A composite roller sand making machine with adjustable crushing force

Abstract

The present invention provides a composite double-roller sand making machine with adjustable crushing force, comprising a transmission device and a sand making machine body. A first roller and a second roller are disposed within the sand making machine body. The sand making machine body comprises two frame plates, each having a slot and a swing hole formed in the middle portion thereof. The slot engages with a linear motion device, and the swing hole engages with the swing device. The swing device comprises two swing frames, one side of each swing frame being connected to the swing hole via a second bearing assembly. The other side of each swing frame is provided with a spring device. The top of each swing frame is provided with a second bearing seat, and a second roller is mounted on the second bearing seat. The present invention utilizes the linear motion device to adjust the gap between the two rollers, and the swing device to achieve adjustable crushing force between the two rollers during the sand making process.

Description

Technical Field

[0001] The invention belongs to the technical field of speed reducers, and in particular relates to a composite double-roller sand making machine with adjustable crushing force. Background Art

[0002] The double-roller sand making machine is a highly efficient and energy-saving machine for crushing machine-made sand. During operation, material passes through the feeding device and enters the crushing chamber formed between the movable and fixed rollers by gravity. There, it is forced to receive direct pressure from the roller surfaces while the two rollers rotate in opposite directions, achieving continuous crushing of the material. In conventional sand making machines, the crushing force provided between the two rollers is fixed after adjustment. The stones to be crushed vary in size, which results in an increase in the needle-like content of the manufactured sand, a gradual decrease in the bulk density of the manufactured sand, a gradual increase in the porosity, and an increase in the crushing value. Furthermore, the needle-like content of the manufactured sand significantly affects the performance of mortar and concrete. Summary of the Invention

[0003] The invention provides a composite double-roller sand making machine with adjustable crushing force, which has a simple structure, a long service life and is easy to adjust.

[0004] A composite double-roller sand making machine with adjustable crushing force includes a transmission device and a sand making machine body, wherein a first roller and a second roller are provided in the sand making machine body, and the sand making machine body includes two frame plates, which are connected by a fixed plate, and a slot and a swing hole are provided in the middle parts of the two frame plates, the slot cooperates with a linear motion device, and the swing hole cooperates with the swing device; a plug-in fixing seat is installed on the side of the two frame plates close to the slot, and a spring seat is installed on the side of the two frame plates close to the swing hole.

[0005] The linear motion device includes two adjustment frames, one side of which is connected to a slotted groove via a first bearing assembly. A push-pull mechanism is provided on the other side of each adjustment frame. Each adjustment frame is topped with a first bearing seat, on which a first roller is mounted. The push-pull mechanism is mounted on a tab holder and includes a push-pull rod and a hydraulic cylinder that drives the push-pull rod. The hydraulic cylinder drives the push-pull rod left and right, thereby adjusting the gap between the first and second rollers. After the gap is adjusted, the push-pull rod is secured via the tab holder to prevent the first roller from moving sideways during operation.

[0006] The swing mechanism comprises two swing frames, one side of which is connected to the swing hole via a second bearing assembly. A spring mechanism is installed on the other side of each swing frame. A second bearing seat is located on the top of each swing frame, and a second roller is mounted on the second bearing seat. The spring mechanism is mounted on a spring seat and includes two or more spring assemblies. The swing mechanism's configuration multiplies the crushing force, achieving efficient extrusion crushing. During the sand production process, the second roller swings with the swing frame, applying some shear force to the material, effectively reducing the amount of needle-like flakes in the manufactured sand.

[0007] The slot and the swing hole are arranged on the left and right, and the axis of the slot is lower than the axis of the swing hole. The height of the spring seat is flush with the axis of the swing hole. The two frame plates have the same structure and are in a "convex" shape. The top end surfaces of the adjustment frame and the swing frame are located on the same horizontal plane, and the top end surfaces of the adjustment frame and the swing frame are higher than the top end surfaces of the two frame plates. The adjustment frame and the swing frame form a "concave" structure with the frame plate, which can ensure the synchronous movement of the bearing seats on both sides of the roller ring, and the centers of the bearings on both sides are fixed, thereby reducing the eccentricity of the bearings due to the adjustment of the gap between the two rollers and improving the service life of the bearings. The sunken structure reduces the center height, thereby reducing the bending moment and improving material utilization.

[0008] The transmission device includes a first motor and a second motor that are symmetrically arranged. The first motor is connected to a reducer through a first elastic coupling, and the second motor is connected to the reducer through a second elastic coupling. The reducer is connected to a first universal joint and a second universal joint. The first motor controls the first universal joint, and the second motor controls the second universal joint.

[0009] The first universal coupling is connected to the first roller, and the second universal coupling is connected to the second roller. The power output function is realized by setting the transmission device, and the transmission device and the sand making machine body adopt a split design, and the torque is transmitted through the universal coupling.

[0010] The technical effects of the present invention are:

[0011] Through the setting of the swing device, the swing frame uses the principle of lever to provide multiple crushing forces through multiple prefabricated compression springs (adjustable), thereby achieving efficient extrusion crushing. In addition, partial shear force is applied to the material during the swinging process, effectively reducing the needle-like content of the machine-made sand.

[0012] The linear motion device, which uses a slider and rectangular guide rails, allows for convenient roller clearance adjustment via a hydraulic cylinder. Once the clearance is adjusted, it is locked with the inserts on both sides, keeping the roller on that side stationary while the machine is operating.

[0013] The structure of the swing frame, adjustment frame, and frame plate allows the roller ring to be supported by sunken bearing seats on both sides, located in the center of the concave structure. The overall concave frame structure ensures synchronous movement of the bearing seats on both sides of the roller ring. The center of each bearing is fixed, reducing the eccentricity caused by adjusting the gap between the two rollers and improving bearing service life. The sunken structure reduces the center height, thereby reducing bending moment and improving material utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described below with reference to the accompanying drawings:

[0015] Figure 1 This is a schematic diagram of the main structure of a composite double-roller sand making machine with adjustable crushing force according to the present invention;

[0016] Figure 2 This is a schematic diagram of the top view of a composite double-roller sand making machine with adjustable crushing force according to the present invention;

[0017] Figure 3 This is a left-side structural schematic diagram of a composite double-roller sand making machine with adjustable crushing force according to the present invention;

[0018] Figure 4 This is a schematic diagram of the main structure of two frame plates of the present invention;

[0019] Figure 5 This is a schematic diagram of the top view of the two frame plates of the present invention.

[0020] Figure: 1, frame plate; 2, adjustment frame; 3, swing frame; 6, reducer; 11, slot; 12, swing hole; 13, fixed plate; 14, insert fixing seat; 15, spring seat; 21, first roller; 22, first bearing assembly; 23, first bearing seat; 24, push-pull rod; 25, hydraulic

[0021] Cylinder; 31. Second roller; 32. Second bearing assembly; 33. Second bearing seat; 34. Spring assembly; 41. First motor; 42. Second motor; 51. First elastic coupling; 52. Second elastic coupling; 71. First universal coupling; 72. Second universal coupling. Implementation Method

[0022] The following is combined with Figure 1-5 The specific implementation method further describes the technical solution of this patent in detail.

[0023] A composite double-roller sand making machine with adjustable crushing force includes a transmission device and a sand making machine body. A first roller 21 and a second roller 31 are provided in the sand making machine body. The sand making machine body includes two frame plates 1. The two frame plates 1 are connected by a fixed plate 13. A straight groove 11 and a swing hole 12 are provided in the middle part of the two frame plates 1. The straight groove 11 and the swing hole 12 are arranged on the left and right, and the axis center of the straight groove 11 is lower than the axis center of the swing hole 12. The slot 11 cooperates with the linear motion device, and the swing hole 12 cooperates with the swing mechanism. The linear motion device includes two adjustment frames 2, one side of which is connected to the slot 11 via a first bearing assembly 22. The other side of each adjustment frame 2 is equipped with a push-pull mechanism. The top of each adjustment frame 2 is equipped with a first bearing seat 23, and the first roller 21 is mounted on the first bearing seat 23. The swing mechanism includes two swing frames 3, one side of which is connected to the swing hole 12 via a second bearing assembly 32. The other side of each swing frame 3 is equipped with a spring mechanism. The top of each swing frame 3 is equipped with a second bearing seat 33, and the second roller 31 is mounted on the second bearing seat 33. The two frame plates 1 have the same structure and are convex in shape. The top end surfaces of the adjustment frame 2 and the swing frame 3 are located on the same horizontal plane and are higher than the top end surfaces of the two frame plates 1. The first bearing assembly 22, the adjustment frame 2, and the swing frame 3 form a concave structure with the two frame plates 1. The first and second bearing assemblies 22 and 32 are conventional. Bearing assemblies are key components in any rotating equipment. The second bearing assembly 32 is located in the middle of the concave structure, ensuring synchronous movement of the bearing seats on both sides of the roller ring. The centers of the bearings on both sides are fixed, reducing eccentricity caused by adjusting the gap between the two rollers and improving bearing service life. The sunken structure reduces center height, thereby reducing bending moment and improving material utilization.

[0024] A plug-in fixing seat 14 is installed on one side of the two frame plates 1 near the slot 11, and a spring seat 15 is installed on one side of the two frame plates 1 near the swing hole 12. The height of the spring seat 15 is flush with the axis of the swing hole 12.

[0025] The push-pull device is installed on the insert fixing seat 14, and the push-pull device includes a push-pull rod 24 and a hydraulic cylinder 25 that drives the push-pull rod 24. The spring device is installed on the spring seat 15, and the spring device includes more than two spring assemblies 34.

[0026] The transmission device includes a symmetrically arranged first motor 41 and second motor 42. The first motor 41 is connected to the reducer 6 via a first elastic coupling 51, while the second motor 42 is connected to the reducer 6 via a second elastic coupling 52. The reducer 6 is connected to a first universal coupling 71 and a second universal coupling 72. The first motor 41 controls the first universal coupling 71, while the second motor 42 controls the second universal coupling 72. The first universal coupling 71 is connected to the first roller 21, while the second universal coupling 72 is connected to the second roller 31. The transmission device and the sand making machine body are designed separately, with torque transmitted via the universal coupling. The transmission device can be implemented in a variety of ways.

[0027] The working principle of the present invention is: the hydraulic cylinder 25 drives the push-pull rod 24 to move left and right to adjust the gap between the first roller 21 and the second roller 31. After the adjustment is completed, it is fixed by the insert fixing seat 14, and the first motor 41 is turned on to drive the first universal joint 71 and the first roller 21 to rotate through the reducer 6. The second motor 42 is turned on to drive the second universal joint 72 and the second roller 31 to rotate through the reducer 6. The fulcrum of the swing frame 3 is on the second bearing assembly 32, and the spring assembly 34 is at the end away from the fulcrum. The lever is used to move away, and partial shear force is applied to the material during the swinging process of the second roller 31. Finally, the first roller 21 cooperates with the second roller 31 to achieve efficient extrusion and crushing of the material.

[0028] In the description of the present invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc., should be understood in a broad sense. For example, "connected" may refer to a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0030] The above describes in detail the preferred embodiments of this patent, but this patent is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in this field without departing from the purpose of this patent.

Claims

1. A composite roller sand making machine with adjustable crushing force, comprising a transmission device and a sand making machine body, wherein a first roller (21) and a second roller (31) are provided in the sand making machine body, characterized in that: The sand making machine body comprises two frame plates (1), the two frame plates (1) are connected by a fixed plate (13), and the middle parts of the two frame plates (1) are provided with a straight groove (11) and a swing hole (12), the straight groove (11) cooperates with the linear motion device, and the swing hole (12) cooperates with the swing device; The linear motion device comprises two adjustment frames (2), one side of the two adjustment frames (2) is connected to the slot (11) via a first bearing assembly (22), the other side of the two adjustment frames (2) is provided with a push-pull device, and the top of the two adjustment frames (2) is provided with a first bearing seat (23), and the first roller (21) is installed on the first bearing seat (23); The swing device comprises two swing frames (3), one side of the two swing frames (3) is connected to the swing hole (12) via a second bearing assembly (32), the other side of the two swing frames (3) is provided with a spring device, and the top of the two swing frames (3) is provided with a second bearing seat (33), and the second roller (31) is installed on the second bearing seat (33); The transmission device comprises a first motor (41) and a second motor (42) which are symmetrically arranged. The first motor (41) is connected to a reducer (6) via a first elastic coupling (51), and the second motor (42) is connected to the reducer (6) via a second elastic coupling (52). The reducer (6) is connected to a first universal coupling (71) and a second universal coupling (72). The first motor (41) controls the first universal coupling (71), and the second motor (42) controls the second universal coupling (72). The first universal coupling (71) is connected to a first roller (21), and the second universal coupling (72) is connected to a second roller (31).

2. The composite roller sand making machine with adjustable crushing force according to claim 1, characterized in that: The straight groove (11) and the swing hole (12) are arranged on the left and right sides, and the axis of the straight groove (11) is lower than the axis of the swing hole (12).

3. The composite roller sand making machine with adjustable crushing force according to claim 1, characterized in that: The two frame plates (1) are provided with a plug fixing seat (14) on one side close to the slot (11), and a spring seat (15) is provided on one side close to the swing hole (12). The two frame plates (1) have the same structure and are in a "convex" shape.

4. The composite roller sand making machine with adjustable crushing force according to claim 3, characterized in that: The height of the spring seat (15) is flush with the axis of the swing hole (12).

5. The composite double-roller sand making machine with adjustable crushing force according to claim 1, characterized in that: The push-pull device is mounted on the insert fixing seat (14), and comprises a push-pull rod (24) and a hydraulic cylinder (25) for driving the push-pull rod (24) to move.

6. The composite roller sand making machine with adjustable crushing force according to claim 1, characterized in that: The spring device is mounted on a spring seat (15), and the spring device includes more than two spring assemblies (34).

7. The composite roller sand making machine with adjustable crushing force according to claim 1, characterized in that: The top end surfaces of the adjusting frame (2) and the swing frame (3) are located on the same horizontal plane, and the top end surfaces of the adjusting frame (2) and the swing frame (3) are higher than the top end surfaces of the two frame plates (1).

8. The crushing method of a composite double-roller sand making machine with adjustable crushing force according to claim 1, characterized in that: The sand making machine body is provided with a linear motion device and a swinging device. The linear motion device can adjust the left and right spacing of the rollers on one side, and the swinging device realizes the swing of the rollers on the other side, and drives the two rollers to rotate through the transmission device.

9. The crushing method of a composite double-roller sand making machine with adjustable crushing force according to claim 8, characterized in that: The working steps are as follows: Working step 1: Use the hydraulic cylinder on one side of the frame plate to drive the push-pull rod to move left and right to adjust the distance between the first roller and the second roller. After the adjustment is completed, fix the position of the push-pull rod through the insert fixing seat; Working step 2: Turn on the first motor and the second motor to drive the first universal coupling to connect the first roller to rotate and the second universal coupling to connect the second roller to rotate through the reducer; Working step three: The swing frame and spring device on the other side of the frame plate are set up using the lever principle. When the material is poured between the rollers, the second roller will produce an arc motion. The prefabricated compression provided by more than two spring components provides crushing force, and partial shear force is applied to the material during the swinging process, finally completing the sand making.

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