A crushing device for recycled concrete production

Abstract

The present invention provides a crushing device for recycled concrete production, which belongs to the field of crushing technology; it includes a machine body and a motor installed on the machine body, a movable plate is arranged inside the machine body, and the motor drives the movable plate to move through a transmission mechanism, and also includes: an adjustment plate assembly, the adjustment plate assembly includes a square plate, an adjustment shaft, a back plate and a tension spring, the tension spring is installed between the back plate and the square plate, and the adjustment shaft is provided with a second inclined plane and a third inclined plane. During the crushing process, the circumferential surface of the adjustment shaft is attached to the side of the square plate away from the movable plate. When the material is stuck, the adjustment shaft is driven to rotate to adjust the distance between the square plate and the movable plate. When the concrete block is stuck on the top of the square plate, the adjustment shaft rotates to make the second inclined plane attached to the side of the square plate away from the movable plate. By setting the square plate and the adjustment shaft, the present invention does not need to move the concrete block with hand-held tools during the whole process, and the operation is safer, and the crushing efficiency of the concrete block stuck in the middle of the movable plate can be improved.

Description

Technical Field

[0001] The invention relates to the field of crushing technology, in particular to a crushing device for producing recycled concrete. Background Art

[0002] Recycled concrete refers to concrete that uses recycled aggregate (usually waste concrete blocks) as the main material after crushing. During production, the concrete blocks must first be crushed by a jaw crusher. After crushing, the crushed products are screened. After screening, a new type of concrete is made through a specific process. The jaw crusher is mainly composed of a body, a moving plate, a fixed plate, a motor and a transmission mechanism. The motor drives the moving plate to move through the transmission mechanism, thereby crushing the concrete between the moving plate and the fixed plate.

[0003] When crushing concrete blocks by a jaw crusher, due to the different sizes and shapes of the concrete blocks, when the concrete blocks fall to the feeding port of the jaw crusher, the concrete blocks may be stuck on the top plate or the middle position of the jaw crusher due to their shape, and the concrete blocks will not be able to be crushed. At this time, manual hand-held levers and other tools are required to change the position of the concrete blocks so that the concrete blocks can continue to be crushed. However, in the process of moving the concrete blocks, the motor always drives the moving plate to work, so there is a certain risk during the operation of the personnel. Therefore, the present application provides a crushing device for recycled concrete production to meet the needs. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a crushing device for recycled concrete production to solve the problem of certain dangers for personnel during operation.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] A crushing device for recycled concrete production includes a machine body and a motor mounted on the machine body, a moving plate is arranged inside the machine body, and the motor drives the moving plate to move through a transmission mechanism, and also includes:

[0007] An adjusting plate assembly comprises a square plate, an adjusting shaft, a back plate and a tension spring, wherein the tension spring is installed between the back plate and the square plate, and an inclined plane 2 and an inclined plane 3 are provided on the adjusting shaft. During the crushing process, the circumferential surface of the adjusting shaft is fitted against the side of the square plate away from the movable plate. When the concrete block is stuck at the top of the square plate, the adjusting shaft rotates to make the inclined plane 2 fit against the side of the square plate away from the movable plate, and the top square plate is away from the movable plate, so that the concrete block engaged with the top square plate falls down. When the concrete block is stuck in the middle of the square plate and the movable plate, the adjusting shaft rotates to make the inclined plane 3 fit against the side of the square plate away from the movable plate, and a number of square plates are close to the movable plate in an inverted step shape.

[0008] Preferably, the adjustment plate assembly also includes an upper seat and a lower seat arranged in the machine body, a horizontal rotating shaft is fixed to the inner wall of the machine body, the lower seat is movably sleeved on the surface of the horizontal rotating shaft, a back plate is fixed to the side of the upper seat and the lower seat away from the movable plate, the square plate is located between the upper seat and the lower seat, a hydraulic motor is fixed to the bottom of the lower seat, the output shaft of the hydraulic motor movably passes through the lower seat, circular grooves are provided on the facing surfaces of the lower seat and the upper seat, the inner walls of the circular grooves are rotatably connected with vertical rotating shafts, the adjusting shafts are fixed between the vertical rotating shafts, the output shaft of the hydraulic motor is fixed to the bottom of the vertical rotating shaft, and the upper seat is fixedly connected to the machine body by fixing bolts.

[0009] Preferably, an upper extrusion head is fixed to one side of the square plate close to the movable plate by bolts, and a lower extrusion head is fixed to one side of the lower seat close to the movable plate by bolts.

[0010] Preferably, a sloped surface 1 is provided at the bottom of the middle square plate and at a corner close to one side of the moving plate, and a triangular block is fixed on the sloped surface 1.

[0011] Preferably, a vertical surface is provided on the adjustment shaft, and the vertical surface is located between the second inclined surface and the third inclined surface, and there is a smooth transition between the second inclined surface and the vertical surface, and there is a smooth transition between the vertical surface and the third inclined surface.

[0012] Preferably, a guide hole is provided on the side of the square plate away from the movable plate, and a guide rod is fixed on the side of the back plate close to the movable plate, and the guide rod is movably inserted in the guide hole.

[0013] Preferably, an upper inclined surface and a lower inclined surface are provided at a corner of the square plate away from the moving plate, and the upper inclined surface is located above the lower inclined surface.

[0014] Preferably, a drainage hole is provided at the bottom of the lower seat.

[0015] Preferably, two support rods are fixed to the side of the back plate away from the moving plate.

[0016] Preferably, a pull rod is fixed between the two support rods.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects:

[0018] In the above scheme, by setting the square plate and the adjusting shaft, when the concrete block is stuck on the top of the square block, the adjusting shaft rotates to make the inclined surface 2 fit on the side of the square plate away from the movable plate, and the top square plate is away from the movable plate, so that the concrete block clamped with the top square plate falls down. When the concrete block is stuck in the middle of the square plate and the movable plate, the adjusting shaft rotates to make the inclined surface 3 fit on the side of the square plate away from the movable plate. Several square plates are close to the movable plate in an inverted step shape, which can reduce the frequency of concrete blocks bouncing upwards and crush the concrete block stuck in the middle. During the whole process, there is no need for personnel to use hand-held tools to move the concrete blocks, the operation is safer, and the crushing efficiency of the concrete blocks stuck in the middle of the movable plate can be improved.

[0019] By setting up the upper extrusion head and the lower extrusion head, since the concrete block causes serious wear to the upper extrusion head and the lower extrusion head, the upper extrusion head and the lower extrusion head can be replaced separately without replacing the entire square plate, and the replacement cost is lower.

[0020] By setting the inclined plane and the triangular block, when the concrete block is stuck in the middle position of the movable plate, the triangular block on the upper extrusion head at the middle position is used to crush the concrete block. Since the tip of the triangular block points to the concrete block, when the triangular block is subjected to force, the direction of the force is roughly toward the triangular block. Therefore, the triangular block is relatively firm and stable during use. Secondly, the reaction force of the triangular block on the concrete block can further promote the crushing of the concrete block, thereby further improving the crushing efficiency of the concrete block.

[0021] By arranging the upper seat, the lower seat, the vertical rotating shaft and the fixing bolts, the upper extrusion head or the lower extrusion head can be turned down as a whole when being replaced, so that the upper extrusion head and the lower extrusion head face upwards, which is convenient for subsequent replacement or maintenance.

[0022] By setting the vertical surface, when the square plate is replaced and repaired, the vertical surface of the adjusting shaft is fitted to the side of the square plate, the distance between the square plate and the back plate is shortened, the deformation of the tension spring is reduced, thereby reducing the tension of the tension spring and making it easier to remove the tension spring at the corresponding position.

[0023] By setting the support rod and the pull rod, after the whole body is flipped down, it can be supported on the ground by the support rod, which improves the convenience in operation. Secondly, the pull rod can improve the connection stability between the two support rods and prevent the support rods from moving outward. When the whole body is reset, the pull rod can also act as a handle, so that the hand has a place where force can be easily applied, and the operation is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, further serve to explain the principles of the present disclosure and to enable those skilled in the relevant art to make and use the present disclosure.

[0025] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0026] Figure 2 This is a cross-sectional view of the horizontal rotation axis of the present invention;

[0027] Figure 3 It is a schematic diagram of the three-dimensional structure of the adjustment plate assembly of the present invention;

[0028] Figure 4 For the present invention Figure 3 A magnified view of the structure at center;

[0029] Figure 5 This is a schematic diagram of the three-dimensional structure of the upper extrusion head of the present invention;

[0030] Figure 6 It is a cross-sectional view of the tension spring of the present invention;

[0031] Figure 7 This is a cross-sectional view of the adjusting shaft of the present invention;

[0032] Figure 8 This is a schematic diagram of the three-dimensional structure of the adjusting shaft of the present invention;

[0033] Fig. 9 This is a front view of the adjusting shaft of the present invention; Fig.10 It is a top view of the adjustment shaft of the present invention.

[0034] [Reference Signs]

[0035] 1. Machine body; 2. Motor; 3. Moving plate; 4. Adjusting plate assembly; 5. Upper seat; 6. Lower seat; 7. Square plate; 8. Upper extrusion head; 9. Inclined surface 1; 10. Back plate; 11. Hydraulic motor; 12. Adjusting shaft; 13. Inclined surface 2; 14. Inclined surface 3; 15. Vertical surface; 16. Tension spring; 17. Horizontal rotating shaft; 18. Vertical rotating shaft; 19. Fixing bolt; 20. Guide rod; 21. Guide hole; 22. Drain hole; 23. Support rod; 24. Pull rod; 25. Upper inclined surface; 26. Lower inclined surface; 27. Lower extrusion head; 28. Triangular block.

[0036] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments, and the adjustments or modifications made are still included in the scope of the attached claims. DETAILED DESCRIPTION

[0037] The following is a detailed description of a crushing device for recycled concrete production provided by the present invention in conjunction with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternative methods to implement some known technologies; and the accompanying drawings are only for a more specific description of the embodiments, and are not intended to specifically limit the present invention.

[0038] It should be noted that the references to "one embodiment", "embodiment", "exemplary embodiments", "some embodiments" and the like in the specification indicate that the embodiments described may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in conjunction with an embodiment, it should be within the knowledge of a person skilled in the art to implement such feature, structure or characteristic in conjunction with other embodiments (whether or not explicitly described).

[0039] In general, a term can be understood, at least in part, from its use in context. For example, depending, at least in part, on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending, at least in part, on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0040] like Figure 1-Figure 10 As shown, an embodiment of the present invention provides a crushing device for recycled concrete production, including a body 1 and a motor 2 installed on the body 1, a moving plate 3 is arranged inside the body 1, and the motor 2 drives the moving plate 3 to move through a transmission mechanism, and also includes:

[0041] The adjusting plate assembly 4 includes a square plate 7, an adjusting shaft 12, a back plate 10 and a tension spring 16. The tension spring 16 is installed between the back plate 10 and the square plate 7. The adjusting shaft 12 is provided with a second inclined surface 13 and a third inclined surface 14. During the crushing process, the circumferential surface of the adjusting shaft 12 is attached to the side of the square plate 7 away from the movable plate 3. When the concrete block is stuck on the top of the square plate 7, the adjusting shaft 12 rotates to make the second inclined surface 13 attached to the side of the square plate 7 away from the movable plate 3, and the top square plate 7 is away from the movable plate 3, so that the top square plate 7 is in contact with the top square plate 7. 7, the engaged concrete block falls down. When the concrete block is stuck in the middle of the square plate 7 and the movable plate 3, the adjusting shaft 12 rotates to make the inclined surface 3 14 fit on the side of the square plate 7 away from the movable plate 3. Several square plates 7 are close to the movable plate 3 in an inverted step shape. During the crushing process of the concrete block, the concrete block is conveyed by the conveyor belt. The concrete block can be evenly conveyed between the movable plate 3 and the adjusting plate assembly 4. When a concrete block is stuck, the conveyor belt can be stopped until the stuck concrete block is crushed.

[0042] like Figure 1-Figure 10As shown, in this embodiment, the adjustment plate assembly 4 also includes an upper seat 5 and a lower seat 6 arranged in the body 1, a horizontal rotating shaft 17 is fixed to the inner wall of the body 1, the lower seat 6 is movably sleeved on the surface of the horizontal rotating shaft 17, the back plate 10 is fixed to the side of the upper seat 5 and the lower seat 6 away from the movable plate 3, the square plate 7 is located between the upper seat 5 and the lower seat 6, a hydraulic motor 11 is fixed to the bottom of the lower seat 6, the output shaft of the hydraulic motor 11 movably passes through the lower seat 6, circular grooves are provided on the facing surfaces of the lower seat 6 and the upper seat 5, the inner walls of the circular grooves are rotatably connected with a vertical rotating shaft 18, the adjusting shaft 12 is fixed between the vertical rotating shaft 18, the output shaft of the hydraulic motor 11 is fixed to the bottom of the vertical rotating shaft 18, the upper seat 5 is fixedly connected to the body 1 by a fixing bolt 19, and the overall adjustment plate assembly 4 can be rotated down through the horizontal rotating shaft 17 on the lower seat 6, which is convenient for subsequent replacement and maintenance.

[0043] like Figure 3-Figure 7 As shown, in this embodiment, an upper extrusion head 8 is fixed by bolts on one side of the square plate 7 close to the movable plate 3, and a lower extrusion head 27 is fixed by bolts on one side of the lower seat 6 close to the movable plate 3. By providing replaceable upper extrusion heads 8 and lower extrusion heads 27, only the upper extrusion heads 8 and the lower extrusion heads 27 need to be replaced during replacement, thereby reducing replacement costs and making replacement more convenient. Secondly, no matter where the concrete block is clamped, the interval between the lower extrusion head 27 and the movable plate 3 remains unchanged, and the crushing effect will not be affected.

[0044] like Figure 4 As shown, in this embodiment, an inclined surface 9 is provided at the bottom of the middle square plate 7 and at the corner close to the movable plate 3, and a triangular block 28 is fixed on the inclined surface 9. After the inclined surface 9 is provided, when the concrete block stuck in the middle of the movable plate 3 is crushed, stress concentration at the corner of the square plate 7 can be avoided, and damage to the corner of the square plate 7 can be avoided. Secondly, the triangular block 28 is provided on the inclined surface 9, which can further crush the concrete block and improve the crushing efficiency.

[0045] like Figure 8-Figure 10 As shown, in this embodiment, a vertical surface 15 is provided on the adjusting shaft 12, and the vertical surface 15 is located between the second bevel 13 and the third bevel 14. There is a smooth transition between the second bevel 13 and the vertical surface 15, and there is a smooth transition between the vertical surface 15 and the third bevel 14. When the square plate 7 needs to be replaced, the vertical surface 15 is attached to the square plate 7 to reduce the distance between the square plate 7 and the back plate 10, so that the tension of the tension spring 16 is reduced, which saves more effort when removing the tension spring 16. The contact surface is connected in a smooth transition manner, which can be more stable when the surface is replaced, reduce the overall vibration, and reduce the wear of the contact surface.

[0046] like Figure 3 , Figure 5 and Figure 7As shown, in this embodiment, a guide hole 21 is provided on the side of the square plate 7 away from the movable plate 3, and a guide rod 20 is fixed to the side of the back plate 10 close to the movable plate 3, and the guide rod 20 is movably inserted in the guide hole 21. When the square plate 7 is moving, the square plate 7 is guided by the guide rod 20 and the guide hole 21 to make the square plate 7 more stable in horizontal movement, and two upward guide rods 20 and guide holes 21 need to be set on the same square plate 7, which can prevent the square plate 7 from rotating and further improve the stability of the square plate 7 in movement.

[0047] like Figure 3 , Figure 5-Figure 7 As shown, in this embodiment, an upper inclined surface 25 and a lower inclined surface 26 are provided at the corner of the square plate 7 away from the movable plate 3. The upper inclined surface 25 is located above the lower inclined surface 26. When the inclined surface three 14 contacts the square plate 7, the inclined surface three 14 contacts the upper inclined surface 25. The upper inclined surface 25 increases the contact area with the inclined surface three 14, reduces the pressure at the contact position, reduces the wear of the contact surface, and makes the whole more stable during use. When the inclined surface two 13 contacts the square plate 7, the inclined surface two 13 contacts the lower inclined surface 26. The lower inclined surface 26 increases the contact area with the inclined surface two 13, reduces the pressure at the contact position, reduces the wear of the contact surface, and makes the whole more stable during use.

[0048] like Figure 6 and Figure 7 As shown, in this embodiment, a drainage hole 22 is opened at the bottom of the lower seat 6. When rainwater enters the interior of the adjusting plate assembly 4, the rainwater can flow out from the drainage hole 22, which can prevent water from accumulating inside the adjusting plate assembly 4, avoid internal corrosion of the adjusting plate assembly 4, and improve the overall durability of use.

[0049] like Figure 1 , Figure 3 , Figure 5 and Figure 6 As shown, in this embodiment, two support rods 23 are fixed to the side of the back plate 10 away from the moving plate 3. When the adjustment plate assembly 4 is flipped downward, it can be supported on the ground by the two support rods 23, and the height of the two support rods 23 is the same as the base thickness of the body 1, so that after the adjustment plate assembly 4 is rotated down as a whole, the adjustment plate assembly 4 is in a horizontal state as a whole, making subsequent operations more convenient.

[0050] like Figure 1 , Figure 3 , Figure 5 and Figure 6As shown, in the present embodiment, a pull rod 24 is fixed between the two support rods 23. By providing the pull rod 24, the structural strength of the two support rods 23 can be improved. When the support rods 23 are supported on the ground, the support of the support rods 23 is more stable. Secondly, when the whole needs to be pulled upward, the pull rod 24 can also serve as a handle. By holding the hand on the pull rod 24, it is easier for the hand to exert force.

[0051] Working principle: The concrete block falls evenly between the adjusting plate assembly 4 and the moving plate 3 through the conveying device, and the moving plate 3 is driven to move by the motor 2 and the transmission mechanism on the machine body 1, so that the concrete block is broken. In the normal breaking process, the circumferential surface of the adjusting shaft 12 contacts the square plate 7, so that the square plate 7 is in a vertical state;

[0052] When the concrete block is stuck between the top of the square plate 7 and the movable plate 3, the hydraulic motor 11 is started at this time, and the output shaft of the hydraulic motor 11 drives the vertical rotating shaft 18 to rotate, and the vertical rotating shaft 18 drives the adjusting shaft 12 to rotate, so that the inclined surface 2 13 of the adjusting shaft 12 is attached to the square plate 7. Since the square plate 7 and the back plate 10 are connected by the tension spring 16, after the inclined surface 2 13 is attached to the square plate 7, the square plate 7 moves toward the back plate 10, and the square plate 7 is in a positive step shape from top to bottom, and the upper square plate 7 will move in the upper seat 5, so that the concrete block is away from the side of the movable plate 3 and loses support, and the concrete block will fall to the middle position of the movable plate 3, and then the adjusting shaft 12 is rotated again, and the circumferential surface of the adjusting shaft 12 is contacted with the square plate 7 again, so that the square plate 7 is reset. During the operation, there is no need for personnel to use tools to knock down the concrete block, and the operation is safer;

[0053] When the concrete block is too hard and stuck in the middle of the movable plate 3, and bounces up and down, the hydraulic motor 11 is started, and the output shaft of the hydraulic motor 11 drives the vertical rotating shaft 18 to rotate, and the vertical rotating shaft 18 drives the adjusting shaft 12 to rotate, so that the inclined surface 3 14 of the adjusting shaft 12 fits on the square plate 7. Since the square plate 7 and the back plate 10 are connected by the tension spring 16, after the inclined surface 3 14 fits on the square plate 7, the square plate 7 moves toward the movable plate 3, and the square plate 7 is in an inverted step shape from top to bottom. The inverted step-shaped square plates 7 can play a clamping effect on the concrete block, and can prevent the concrete block from moving upward. The concrete block bounces up, making it easier to break. Secondly, when the square plate 7 moves toward the moving plate 3, it can squeeze the concrete block, which can crush the concrete block and improve the crushing efficiency of the concrete block. Secondly, when the moving plate 3 squeezes the concrete block, the concrete block and the triangular block 28 on the inclined surface 9 of the upper squeezing block in the middle are crushed. The triangular block 28 can further crush the concrete block. When the concrete block stuck in the middle of the moving plate 3 is crushed, the hydraulic motor 11 is started again to rotate the adjusting shaft 12 back to the original position, and the whole continues to be used normally.

[0054] When the square plate 7 needs to be replaced, the vertical surface 15 of the adjusting shaft 12 is brought into contact with the square plate 7, so that the square plate 7 is close to the back plate 10, so that the tension of the tension spring 16 is reduced. At this time, the tension spring 16 at the corresponding position is removed through the through hole on the back plate 10, and then the fixing bolt 19 is unscrewed, and the whole is turned down by the pull rod 24, and rotated by the horizontal shaft 17 on the lower seat 6, supported on the ground by the support rod 23, and then the square plate 7 is pulled out, and a new square plate 7 is replaced, and then the whole is rotated back upward, the fixing bolt 19 is tightened, and the tension spring 16 at the corresponding position is reinstalled, and the circumferential surface of the adjusting shaft 12 is fitted on the square plate 7;

[0055] When only the upper extrusion head 8 or the lower extrusion head 27 needs to be replaced, the entire unit is rotated down, but the tension spring 16 does not need to be removed. The upper extrusion head 8 or the lower extrusion head 27 at the corresponding position is then removed and replaced with a new one.

[0056] The present invention encompasses any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the above preferred embodiments of the present invention, and those skilled in the art can fully understand the present invention without the description of these details.

[0057] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A crushing device for recycled concrete production, comprising a body (1) and a motor (2) mounted on the body (1), wherein a moving plate (3) is arranged inside the body (1), and the motor (2) drives the moving plate (3) to move through a transmission mechanism, wherein: Also includes: An adjusting plate assembly (4), the adjusting plate assembly (4) comprising a square plate (7), an adjusting shaft (12), a back plate (10), a tension spring (16), an upper seat (5) and a lower seat (6); a horizontal rotating shaft (17) is fixed to the inner wall of the machine body (1); the lower seat (6) is movably sleeved on the surface of the horizontal rotating shaft (17); the back plate (10) is fixed to a side of the upper seat (5) and the lower seat (6) away from the movable plate (3); the square plate (7) is located between the upper seat (5) and the lower seat (6); the tension spring (16) is installed between the back plate (10) and the square plate (7); a second inclined surface (13) and a third inclined surface (14) are provided on the adjusting shaft (12); during the crushing process, the circumferential surface of the adjusting shaft (12) is attached to a side of the square plate (7) away from the movable plate (3); when the concrete block is stuck on the top of the square plate (7), the adjusting shaft (12) is rotated to make the second inclined surface (13) attached to the square plate ( 7) is away from the side of the movable plate (3), the top square plate (7) is away from the movable plate (3), so that the concrete block clamped with the top square plate (7) falls down, and when the concrete block is clamped in the middle of the square plate (7) and the movable plate (3), the adjusting shaft (12) rotates to make the inclined surface three (14) fit on the side of the square plate (7) away from the movable plate (3), and a plurality of square plates (7) are close to the movable plate (3) in an inverted step shape, and a hydraulic motor (11) is fixed at the bottom of the lower seat (6), and the output shaft of the hydraulic motor (11) movably penetrates the lower seat (6), and circular grooves are provided on the facing surfaces of the lower seat (6) and the upper seat (5), and the inner walls of the circular grooves are rotatably connected with vertical rotating shafts (18), and the adjusting shaft (12) is fixed between the vertical rotating shafts (18), and the output shaft of the hydraulic motor (11) is fixed at the bottom of the vertical rotating shaft (18), and the upper seat (5) is fixedly connected to the body (1) by fixing bolts (19).

2. The crushing device for recycled concrete production according to claim 1, characterized in that: An upper extrusion head (8) is fixed to the side of the square plate (7) close to the movable plate (3) by means of bolts, and a lower extrusion head (27) is fixed to the side of the lower seat (6) close to the movable plate (3) by means of bolts.

3. The crushing device for recycled concrete production according to claim 2, characterized in that: A sloped surface (9) is provided at the bottom of the middle square plate (7) and at a corner close to one side of the movable plate (3), and a triangular block (28) is fixed on the sloped surface (9).

4. The crushing device for recycled concrete production according to claim 1, characterized in that: The adjusting shaft (12) is provided with a vertical surface (15), which is located between the second inclined surface (13) and the third inclined surface (14), and there is a smooth transition between the second inclined surface (13) and the vertical surface (15), and there is a smooth transition between the vertical surface (15) and the third inclined surface (14).

5. The crushing device for recycled concrete production according to claim 1, characterized in that: A guide hole (21) is formed on the side of the square plate (7) away from the movable plate (3), and a guide rod (20) is fixed on the side of the back plate (10) close to the movable plate (3), wherein the guide rod (20) is movably inserted into the guide hole (21).

6. The crushing device for recycled concrete production according to claim 1, characterized in that: An upper inclined surface (25) and a lower inclined surface (26) are provided at a corner of the square plate (7) away from the moving plate (3), and the upper inclined surface (25) is located above the lower inclined surface (26).

7. The crushing device for recycled concrete production according to claim 1, characterized in that: A drainage hole (22) is provided at the bottom of the lower seat (6).

8. The crushing device for recycled concrete production according to claim 1, characterized in that: Two support rods (23) are fixed to a side of the back plate (10) away from the moving plate (3).

9. The crushing device for recycled concrete production according to claim 8, characterized in that: A pull rod (24) is fixed between the two support rods (23).

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