A shock absorbing frame for a bounce screen and a bounce screen

Abstract

The utility model discloses a kind of bounce screen damping racks, including rectangular frame, the inner side of the rectangular frame and the fixed position close to bottom portion have two cross beams, two symmetrically arranged damping structures are installed on each cross beam, the lower layer board of damping structure is installed on cross beam by bolt, its top is fixed with two symmetric screw rods and multiple evenly distributed lower rubber blocks, rubber cylinder is sleeved on each screw rod, bearing seat is installed on the top layer board, two through holes for rubber cylinder are provided on it, the bottom of upper layer board is fixed with multiple evenly distributed upper rubber blocks, two through holes for screw rod are provided on it, screw rod passes through the through hole and is connected with nut;The lower layer board, the middle layer board, the upper layer board of the damping rack for bounce screen and bounce screen are cooperated by rubber cylinder, lower rubber block and upper rubber block, can effectively absorb and buffer vibration energy, and significantly reduce the noise when equipment operates.

Description

Technical Field

[0001] This utility model relates to the field of bouncing screen technology, specifically to a vibration damping frame for a bouncing screen and a bouncing screen. Background Technology

[0002] In current industrial production, material screening is a crucial and ubiquitous process. Its effectiveness directly impacts the smoothness of subsequent production processes and the quality of the final product. Traditional screening methods, especially for sorting lightweight solid waste such as household waste, construction waste, waste plastics, and metal fragments, typically employ bouncy screens. These screens work by using a motor-driven crankshaft to move multiple bouncy plates inside the frame up and down and back and forth, thus shaking and screening the material. However, in existing bouncy screens, the crankshaft is usually directly mounted on a crossbeam inside the frame via bearing seats. During operation, the movement of the bouncy plates causes significant vibration in the frame. This not only generates considerable noise during operation but also easily leads to frame deformation and breakage of the crossbeams inside the frame, significantly shortening the equipment's lifespan and increasing maintenance costs.

[0003] Therefore, we have designed a vibration damping frame and a bouncing screen to solve the above problems. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of the existing technology by providing a vibration damping frame for a bouncing screen and a bouncing screen in order to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a vibration damping frame for a bouncing screen, comprising a rectangular frame, with two crossbeams fixed on the inner side of the rectangular frame near the bottom. Each crossbeam is equipped with two symmetrically arranged vibration damping structures, each vibration damping structure comprising a lower plate, a middle plate, and an upper plate. The lower plate is bolted to the crossbeams, and its top is fixed with two symmetrical threaded rods and multiple evenly distributed lower rubber blocks. Each threaded rod is fitted with a rubber cylinder. The middle plate is positioned above the lower plate, and its top is equipped with a bearing seat with two through holes for the rubber cylinders to pass through. The upper plate is positioned above the middle plate, and its bottom is fixed with multiple evenly distributed upper rubber blocks, each with two through holes for the threaded rods to pass through. The threaded rods pass through the through holes and are connected to nuts.

[0006] As a preferred embodiment of this utility model, the rubber cylinder passes through the through hole in the middle layer plate and is sandwiched between the lower layer plate and the upper layer plate.

[0007] As a preferred embodiment of this utility model, the middle layer plate is sandwiched between the lower rubber block and the upper rubber block.

[0008] As a preferred embodiment of this utility model, the middle part of the upper plate is raised upwards, and the bearing seat is located inside the raised area of ​​the upper plate and does not directly contact the upper plate.

[0009] A bouncing screen includes a vibration damping frame for the bouncing screen, which also includes a crankshaft, a first tensioner, a drive structure, funnels, and a support. The crankshaft is rotatably mounted between the bearing seats of two vibration damping structures on the same crossbeam. Six spring plates are provided above the entire structure of the two crankshafts. The ends of the two crankshafts are each equipped with a first sprocket. The two first sprockets are connected by a first chain drive. The first tensioner is installed inside the rectangular frame, and the tensioning wheel on it presses against the first chain. The drive structure is located outside the rectangular frame and is drive-connected to one of the crankshafts. Three funnels are fixed at the bottom of the rectangular frame, and a support that can adjust the tilt angle is also provided at the bottom of the rectangular frame.

[0010] As a preferred technical solution of this utility model, each of the two crankshafts is provided with six connecting rod journals, and the connecting rod journals of the two crankshafts correspond to each other in pairs. Connecting rods are fixed at the bottom of the ramps and near both ends. The six ramps are rotatably connected to the corresponding two connecting rod journals on the two crankshafts through the two connecting rods at the bottom.

[0011] As a preferred technical solution of this utility model, the length of the springboard is less than the inner length of the rectangular frame, and multiple evenly distributed sieve holes are opened in the middle of the six springboards. The three funnels are located directly below the front end of the springboard, directly below the sieve holes of the springboard, and directly below the rear end of the springboard, respectively.

[0012] As a preferred embodiment of this utility model, the drive structure includes a base plate fixed to the outside of a rectangular frame. A motor and a reducer are mounted on the base plate. The output shaft of the motor is connected to the input shaft of the reducer. A second sprocket is mounted on the output shaft of the reducer. A circular through hole with a radius larger than the main shaft radius of the crankshaft is opened on the side of the rectangular frame where the reducer is located, corresponding to the position of one of the crankshaft ends. The main shaft end of the crankshaft passes through the circular through hole and is also mounted with a second sprocket. The two second sprockets are connected by a second chain drive. A second tensioner is also mounted on the base plate, and the tensioning wheel on it presses against the second chain.

[0013] As a preferred embodiment of this utility model, the front part of the rectangular frame is rotatably mounted on the front part of the bracket via a hinge, and two symmetrical hydraulic cylinders are arranged between the rear part of the rectangular frame and the rear part of the bracket. Both ends of the hydraulic cylinders are respectively connected to the rectangular frame and the bracket via hinges.

[0014] As a preferred embodiment of this utility model, a maintenance platform is fixedly installed on the bracket.

[0015] Compared with the prior art, the present invention provides a vibration damping frame for a bouncing screen and a bouncing screen, which has the following beneficial effects:

[0016] The bouncing screen uses a vibration-damping frame and is equipped with a vibration-damping structure. The lower, middle, and upper plates of the vibration-damping structure work together through rubber cylinders, lower rubber blocks, and upper rubber blocks. When the bouncing screen is working, it can effectively absorb and buffer vibration energy, greatly reducing the impact of vibration on the rectangular frame and other components, reducing the wear of equipment parts, extending the service life of the equipment, reducing maintenance costs, and significantly reducing the noise of the equipment during operation, creating a quieter and more comfortable working environment for operators. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of the rectangular frame of this utility model;

[0019] Figure 3 This is an enlarged view of section A of this utility model;

[0020] Figure 4 This is a schematic diagram of the vibration reduction structure of this utility model;

[0021] Figure 5 This is a schematic diagram of the bouncing screen structure of this utility model;

[0022] Figure 6 This is an enlarged view of section B of this utility model.

[0023] Reference numerals in the attached drawings: 1. Rectangular frame; 2. Crossbeam; 3. Vibration damping structure; 301. Lower plate; 302. Rubber cylinder; 303. Middle plate; 304. Upper plate; 305. Nut; 306. Threaded rod; 307. Lower rubber block; 308. Bearing seat; 309. Upper rubber block; 4. Crankshaft; 5. Skip; 6. First sprocket; 7. First chain; 8. First tensioner; 9. Drive structure; 901. Base plate; 902. Motor; 903. Reducer; 904. Second sprocket; 905. Second chain; 906. Second tensioner; 10. Funnel; 11. Support; 12. Hydraulic cylinder; 13. Maintenance platform. 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] Example 1: Please refer to Figures 1-6This embodiment provides a vibration damping frame for a bouncing screen and the specific structure of the bouncing screen. The vibration damping frame includes a rectangular frame 1. Two parallel crossbeams 2 are fixed to the inner side of the rectangular frame 1 near the bottom. Two vibration damping structures 3 are symmetrically installed on each crossbeam 2. In the vibration damping structure 3, the lower plate 301 is fixed to the crossbeam 2 by bolts. Its top is provided with two symmetrical threaded rods 306 and multiple evenly distributed lower rubber blocks 307. Each threaded rod 306 is fitted with a rubber cylinder 302. The middle plate 303 is located above the lower plate 301 and has through holes for the rubber cylinders 302 to pass through. A bearing seat 308 is installed on its top. The upper plate 304 is located above the middle plate 303 and has multiple evenly distributed upper rubber blocks 309 at its bottom. Through holes are provided for the threaded rods 306 to pass through. After the threaded rods 306 pass through the through holes, they are connected by nuts 306. 5. Locking: At this point, the rubber cylinder 302 passes through the through hole on the middle layer plate 303 and is clamped between the lower layer plate 301 and the upper layer plate 304. The middle layer plate 303 is clamped between the lower rubber block 307 and the upper rubber block 309. The setting of the rubber cylinder 302 can determine the horizontal position of the middle layer plate 303 and the bearing seat 308. The setting of the lower rubber block 307 and the upper rubber block 309 can determine the vertical position of the middle layer plate 303 and the bearing seat 308. Through the joint cooperation of the rubber cylinder 302, the lower rubber block 307 and the upper rubber block 309, the vibration generated by the bearing seat 308 during operation can be absorbed, thereby achieving the effect of vibration reduction. The middle part of the upper layer plate 304 is raised upward. The bearing seat 308 is located inside the raised area and does not contact the upper layer plate 304. This design can effectively prevent the bearing seat 308 from impacting the upper layer plate 304 during production vibration.

[0026] The bouncing screen includes the aforementioned vibration-damping frame. A crankshaft 4 is rotatably mounted between the bearing seats 308 of two vibration-damping structures 3 on the same crossbeam 2. Six springboards 5 are provided above the two crankshafts 4. First sprockets 6 are mounted at the ends of the crankshafts 4, and the two first sprockets 6 are driven by a first chain 7. A first tensioner 8 is installed inside the rectangular frame 1, and the tensioning wheel presses against the first chain 7. A drive structure 9 is located outside the rectangular frame 1 and is connected to one of the crankshafts 4. Three funnels 10 are fixed at the bottom of the rectangular frame 1, and a bracket 11 is also provided at the bottom to adjust the tilt angle of the rectangular frame 1. Both crankshafts 4 have six connecting rod journals, which correspond to each other in pairs. The bottom ends of the springboards 5 are fixed... A fixed connecting rod is used, and six ramps 5 are rotatably connected to the corresponding connecting rod journals of the two crankshafts 4 via bottom connecting rods. The length of ramp 5 is less than the inner length of the rectangular frame 1. Multiple sieve holes are opened in the middle of the ramps. The sieve holes can be round or square, depending on the actual material. Three funnels 10 are located directly below the front end, the sieve holes, and the rear end of ramp 5, respectively. In the drive structure 9, the base plate 901 is fixed to the outside of the rectangular frame 1, and a motor 902 and a reducer 903 are installed on it. The output shaft of the motor 902 is connected to the input shaft of the reducer 903. The output shaft of the reducer 903 and the corresponding crankshaft 4 main shaft ends are both equipped with second sprockets. 904. Two second sprockets 904 are driven by a second chain 905. A through hole with a radius larger than the main shaft radius of crankshaft 4 is opened on the side of the rectangular frame 1 for the crankshaft 4 main shaft to pass through. A second tensioner 906 is installed on the base plate 901, and the tensioning wheel presses on the second chain 905. When the motor 902 starts, it can drive one of the crankshafts 4 to rotate through the reducer 903 and the second chain 905. Then the rotating crankshaft 4 drives the other crankshaft to rotate synchronously through the first chain 7, thereby controlling the up-and-down and back-and-forth movement of the six scaffolds 5 above the crankshaft 4 to achieve the shaking and screening of materials. A control console is set next to the support 11. Machine 902 uses a variable frequency motor connected to a control console, which controls its operation. The front of the rectangular frame 1 is hinged and mounted on the front of the support 11. Two symmetrical hydraulic cylinders 12 are installed between the rear of the rectangular frame 1 and the rear of the support 11. The two ends of the hydraulic cylinders 12 are connected to the rectangular frame 1 and the support 11 respectively through hinges. The hydraulic cylinders 12 are connected to an external hydraulic control system. The tilt angle of the rectangular frame 1 can be adjusted by the hydraulic cylinders 12 to adapt to the screening of different materials. A maintenance platform 13 is fixedly installed on the support 11. Operators can climb to the top of the support 11 through the maintenance platform 13 to facilitate the later inspection and maintenance of the bouncing screen.

[0027] Operating Procedure: When using this bouncing screen, first, according to the material screening requirements, adjust the extension and retraction of the two hydraulic cylinders 12 between the support 11 and the rear of the rectangular frame 1 to make the rectangular frame 1 rotate around the front hinge, adjusting the rectangular frame 1 to a suitable tilt angle. Then, start the drive structure 9, and the motor 902 will run. Its output shaft drives one of the crankshafts 4 to rotate through the reducer 903 and the second chain 905, and then drives the other crankshaft 4 to rotate through the first chain 7. The tensioning wheels of the first tensioner 8 and the second tensioner 906 press on the first chain 7 and the second chain 905 respectively to ensure stable transmission. The six springboards 5 above the crankshaft 4 bounce back and forth and up and down under the drive of the crankshaft 4, putting the material conveying equipment from above the rectangular frame 1 onto the springboards 5, where it bounces. During the process, materials smaller than the screen hole size fall through the screen hole into the funnel 10 located directly below the screen hole of the springboard 5. Materials larger than the screen hole size slide down with the movement of the springboard 5 to the funnels 10 located directly below the front and rear ends of the springboard 5, respectively. During the operation of the springboard screen, the vibration damping structure 3 plays a role. When the bearing seat 308, crankshaft 4 and springboard 5 vibrate as a whole, the rubber cylinder 302, lower rubber block 307 and upper rubber block 309 undergo elastic deformation to absorb and buffer the vibration energy and reduce the impact of vibration on the rectangular frame 1 and other components. If the springboard screen needs to be repaired during use, the staff can climb onto the maintenance platform 13 fixedly installed on the support 11 to inspect and maintain components such as the motor 902, reducer 903, chain, sprocket, crankshaft 4, and springboard 5.

[0028] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A shock-absorbing frame for a bounce screen, comprising a rectangular frame (1), characterized in that: Two crossbeams (2) are fixed inside the rectangular frame (1) near the bottom. Each crossbeam (2) is equipped with two symmetrically arranged vibration damping structures (3). The vibration damping structure (3) includes a lower plate (301), a middle plate (303), and an upper plate (304). The lower plate (301) is bolted to the crossbeam (2), and its top is fixed with two symmetrical threaded rods (306) and multiple evenly distributed lower rubber blocks (307). Each threaded rod (306) has two symmetrical threaded rods (306) and multiple evenly distributed lower rubber blocks (307). A rubber cylinder (302) is fitted on the upper layer plate (303), which is located above the lower layer plate (301). A bearing seat (308) is installed on the top of the upper layer plate (303), and two through holes are opened on the upper layer plate (304) for the rubber cylinder (302) to pass through. A multiple evenly distributed upper rubber blocks (309) are fixed at the bottom of the upper layer plate (304), and two through holes are opened on the upper layer plate (309) for the threaded rod (306) to pass through. The threaded rod (306) passes through the through hole and is connected to a nut (305).

2. A bounce screen shock absorbing housing according to claim 1, characterized in that: The rubber cylinder (302) passes through the through hole on the middle plate (303) and is sandwiched between the lower plate (301) and the upper plate (304).

3. The bounce screen shock absorbing frame of claim 1, wherein: The middle layer plate (303) is sandwiched between the lower rubber block (307) and the upper rubber block (309).

4. The bounce screen shock absorbing housing of claim 1, wherein: The upper plate (304) is raised upward in the middle, and the bearing seat (308) is located inside the raised area of ​​the upper plate (304) and does not directly contact the upper plate (304).

5. A bouncing screen, comprising a vibration damping frame for a bouncing screen as described in any one of claims 1-4, further comprising a crankshaft (4), a first tensioner (8), a drive structure (9), a funnel (10), and a support (11), characterized in that: A crankshaft (4) is rotatably mounted between the bearing seats (308) of the two vibration damping structures (3) on the same crossbeam (2). Six scaffolds (5) are set above the two crankshafts (4). A first sprocket (6) is installed at the end of each of the two crankshafts (4). The two first sprockets (6) are connected by a first chain (7). A first tensioner (8) is installed inside the rectangular frame (1). The tensioning wheel on it presses on the first chain (7). A drive structure (9) is set outside the rectangular frame (1) and is connected to one of the crankshafts (4). Three funnels (10) are fixed at the bottom of the rectangular frame (1). A bracket (11) that can adjust the tilt angle is also provided at the bottom of the rectangular frame (1).

6. A bounce screen according to claim 5, wherein: Each of the two crankshafts (4) is provided with six connecting rod journals, and the connecting rod journals of the two crankshafts (4) correspond to each other. The bottom of the ramp (5) and near both ends are fixed with connecting rods. The six ramps (5) are rotatably connected to the two corresponding connecting rod journals on the two crankshafts (4) through the two connecting rods at the bottom.

7. A bounce screen according to claim 5, wherein: The length of the springboard (5) is less than the inner length of the rectangular frame (1). The middle of each of the six springboards (5) is provided with multiple evenly distributed sieve holes. The three funnels (10) are located directly below the front end of the springboard (5), directly below the sieve holes of the springboard (5), and directly below the rear end of the springboard (5), respectively.

8. A bounce screen according to claim 5, wherein: The drive structure (9) includes a base plate (901) fixed to the outside of the rectangular frame (1). A motor (902) and a reducer (903) are mounted on the base plate (901). The output shaft of the motor (902) is connected to the input shaft of the reducer (903). A second sprocket (904) is mounted on the output shaft of the reducer (903). A circular through hole with a radius larger than the main shaft radius of the crankshaft (4) is opened on the side of the rectangular frame (1) where the reducer (903) is located, corresponding to the position of one of the crankshafts (4). The main shaft end of the crankshaft (4) passes through the circular through hole and is also mounted with a second sprocket (904). The two second sprockets (904) are connected by a second chain (905). A second tensioner (906) is also mounted on the base plate (901), and the tensioning wheel on it presses on the second chain (905).

9. A bounce screen according to claim 5, wherein: The front part of the rectangular frame (1) is mounted on the front part of the bracket (11) by hinge. Two symmetrical hydraulic cylinders (12) are arranged between the rear part of the rectangular frame (1) and the rear part of the bracket (11). Both ends of the hydraulic cylinders (12) are connected to the rectangular frame (1) and the bracket (11) respectively by hinge.

10. A bouncing screen according to claim 5, characterized in that: A maintenance platform (13) is fixedly installed on the bracket (11).

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