Supporting structure of double-shaft vibrating screen

Abstract

The supporting structure of the double-shaft vibrating screen comprises a screen box, a supporting plate and two sets of vibration excitation units, the supporting plate is fixed to the two sides of the screen box through first fastening bolts, the two sets of vibration excitation units are arranged on the supporting plate in a front-back mode and located above the screen box, and each vibration excitation unit comprises a bearing seat, a bearing body, a main shaft and an eccentric structure. The bearing seat is fixed on the supporting plate through a second fastening bolt, the bearing body is arranged in the bearing seat, the two ends of the main shaft are matched with the bearing body, and the eccentric structures are arranged at the two ends of the main shaft. The bearing plate and the screen box are connected in a bolt fixing mode, the problem of connecting face deformation caused by welding residual stress is avoided, the operation stability of the bearing seat and the main shaft is ensured, and dynamic balance damage caused by asymmetric centrifugal force is effectively avoided. In addition, the screen box and the supporting plate can be detached through the bolt fixing mode, and installation and maintenance are convenient.

Description

Technical Field

[0001] This utility model relates to the field of vibrating screen structure, and in particular to a support structure for a dual-shaft vibrating screen. Background Technology

[0002] Horizontal vibrating screens are used in quarries, mines, and aggregate processing plants to screen materials. They work by using a vibrator to drive a screen box, generating high-frequency vibrations to separate materials. To ensure direct vibration transmission, the vibrator is typically mounted directly on the screen box via a bearing housing. However, this structure subjects the bearing housing to high-intensity alternating loads and dynamic impacts over extended periods, necessitating robust connections between the bearing housing and the screen box. Traditionally, vibrating screens use welding to connect the bearing housing and screen box. While this ensures direct vibration transmission, residual stress from welding can deform the connection surface over time, leading to deviations in the bearing housing's perpendicularity. This, in turn, causes asymmetric centrifugal forces during screen operation, disrupting dynamic balance and potentially resulting in abnormal screen box oscillation and uneven bearing wear. Utility Model Content

[0003] The purpose of this invention is to propose a support structure for a dual-axis vibrating screen to solve one or more technical problems existing in the background art.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] A support structure for a dual-shaft vibrating screen includes a screen box, a support plate, and two sets of excitation units. The support plate is fixed to both sides of the screen box by first fastening bolts. The two sets of excitation units are arranged one after the other on the support plate and located above the screen box. Each excitation unit includes a bearing seat, a bearing body, a main shaft, and an eccentric structure. The bearing seat is fixed to the support plate by second fastening bolts. The bearing body is disposed within the bearing seat. Both ends of the main shaft are engaged with the bearing body. The eccentric structure is disposed at both ends of the main shaft.

[0006] Preferably, the screen box includes side plates, at least one layer of screen frame and screen mesh, the screen frame is fixed between the side plates by a third fastening bolt, and the screen mesh is fixed on the screen frame.

[0007] Preferably, the support plate is fixed to the outside of the side plate by at least three rows of the first fastening bolts.

[0008] Preferably, the screen box further includes a plurality of gaskets, which are evenly distributed on the screen mesh and are fixed to the screen mesh and the screen frame by a fourth fastening bolt.

[0009] Preferably, the eccentric structure includes an eccentric block and a turntable, the turntable is fixed to the end of the main shaft, the turntable is located on the outside of the side plate, the end face of the turntable is provided with a receiving groove, and the eccentric block is fixed in the receiving groove.

[0010] Preferably, the excitation unit further includes a bushing and a protective seat. The bushing is disposed on the outside of the main shaft, and both ends of the bushing are fixedly connected to the bearing seat. The protective seat is fixed to the side plate, and a limit hole is formed on the protective seat, with the turntable located in the limit hole.

[0011] Preferably, it also includes a spring support, which is fixed to the outside of the screen box by a fifth fastening bolt.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: In this utility model, the connection between the support plate used to support the excitation unit and the screen box is achieved by bolt fixing, which avoids the problem of deformation of the connection surface caused by welding residual stress, ensures the running stability of the bearing seat and the main shaft, and effectively avoids dynamic balance damage caused by asymmetric centrifugal force; moreover, the bolt fixing method also makes the screen box and the support plate detachable, which is convenient for installation and maintenance. Attached Figure Description

[0013] The accompanying drawings further illustrate the present invention, but the content of the drawings does not constitute any limitation on the present invention.

[0014] Figure 1 This is a side view structural diagram of one embodiment of the present invention;

[0015] Figure 2 This is a schematic diagram of the internal structure of one embodiment of the present invention;

[0016] Figure 3 This is a top view of one embodiment of the present invention.

[0017] The components include: screen box 1, support plate 2, vibration unit 3, bearing seat 31, bearing body 32, main shaft 33, side plate 11, screen frame 12, screen mesh 13, first fastening bolt 21, second fastening bolt 311, third fastening bolt 121, fourth fastening bolt 131, gasket 14, eccentric block 34, turntable 35, receiving groove 351, bushing 36, protective seat 37, limiting hole 371, spring support 4, and fifth fastening bolt 41. Detailed Implementation

[0018] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0019] This embodiment provides a support structure for a biaxial vibrating screen, see attached diagram. Figure 1-3The system includes a screen box 1, a support plate 2, and two sets of excitation units 3. The support plate 2 is fixed to both sides of the screen box 1 by the first fastening bolt 21. The two sets of excitation units 3 are arranged on the support plate 2 one after the other and located above the screen box 1. The excitation unit 3 includes a bearing seat 31, a bearing body 32, a main shaft 33, and an eccentric structure. The bearing seat 31 is fixed to the support plate 2 by the second fastening bolt 311. The bearing body 32 is located inside the bearing seat 31. Both ends of the main shaft 33 are engaged with the bearing body 32. The eccentric structure is located at both ends of the main shaft 33.

[0020] In this embodiment, the connection between the support plate 2 used to support the excitation unit 3 and the screen box 1 is achieved by bolt fixing, which avoids the deformation of the connection surface caused by welding residual stress, ensures the running stability of the bearing seat 31 and the main shaft 33, and effectively avoids dynamic balance damage caused by asymmetric centrifugal force; moreover, the bolt fixing method also makes the screen box 1 and the support plate 2 detachable, which is convenient for installation and maintenance.

[0021] Preferably, the screen box 1 includes side plates 11, at least one screen frame 12, and a screen 13. The screen frame 12 is fixed between the side plates 11 by third fastening bolts 121, and the screen 13 is fixed on the screen frame 12. The connection between the screen frame 12 and the two side plates 11 is achieved by the third fastening bolts 121, which not only further avoids the problem of deformation of the connection surface caused by residual stress from welding, but also facilitates the replacement of the screen frame 12 and the screen 13, reducing maintenance costs. The screen 13 is fixed on the screen frame 12, so that the screen 13 can screen the stone during vibration, meeting the material screening needs in quarries, mines, and aggregate processing scenarios.

[0022] Preferably, the support plate 2 is fixed to the outside of the side plate 11 by three rows of first fastening bolts 21. Using three rows of first fastening bolts 21 to fix the support plate 2 to the side plate 11 improves the firmness of the connection between the support plate 2 and the screen box 1. Since the high-frequency vibration generated by the excitation unit 3 is transmitted to the screen box 1 through the support plate 2 during the operation of the vibrating screen, a sufficient number of fastening bolts, such as the three rows in this embodiment, can more effectively disperse and bear the vibration load, preventing the support plate 2 from loosening, displacing, or even falling off, thus ensuring the stability of the vibrating screen operation. Furthermore, the multiple rows of first fastening bolts 21 also serve to position the support plate 2 during the assembly process, ensuring the installation accuracy of the support plate 2 and the excitation unit 3.

[0023] Preferably, the screen box 1 further includes multiple gaskets 14, which are evenly distributed on the screen mesh 13. The gaskets 14 are fixed to the screen mesh 13 and the screen frame 12 by a fourth fastening bolt 131. By setting multiple gaskets 14, the screen mesh 13 and the screen frame 12 are tightly fixed, reducing the gap between the screen mesh 13 and the screen frame 12. This makes the screen mesh 13 more stable during vibration, reducing loosening and displacement caused by vibration, and ensuring the stability and reliability of the overall structure of the screen box 1.

[0024] Preferably, the eccentric structure includes an eccentric block 34 and a turntable 35. The turntable 35 is fixed to the end of the main shaft 33 and is located on the outside of the side plate 11. The end face of the turntable 35 is provided with a receiving groove 351, and the eccentric block 34 is fixed in the receiving groove 351.

[0025] By fixing the eccentric block 34 in the turntable 35, the turntable 35, fixed to the end of the main shaft 33, rotates simultaneously when the main shaft 33 rotates, thereby driving the eccentric block 34 to rotate synchronously. The resulting vibration is directly transmitted to the screen box 1, ensuring normal screening operation. By installing the eccentric block 34 in the receiving groove 351 on the end face of the turntable 35, the turntable 35 limits the eccentric block 34 during high-speed rotation, preventing it from being thrown off the turntable 35 due to excessive centrifugal force, thus avoiding potential damage to surrounding equipment and personnel caused by flying parts. In addition, by fixing the eccentric block 34 on the turntable 35, it is also convenient to replace eccentric blocks 34 of different weights to meet different screening requirements.

[0026] Preferably, the excitation unit 3 further includes a bushing 36 and a protective seat 37. The bushing 36 is located on the outside of the main shaft 33, and both ends of the bushing 36 are fixedly connected to the bearing seat 31. The protective seat 37 is fixed on the side plate 11, and a limiting hole 371 is provided on the protective seat 37, with the turntable 35 located within the limiting hole 371. By fixing the bushing 36 to the outer periphery of the main shaft 33, the main shaft 33 is protected, preventing external foreign objects (such as ore fragments, dust, etc.) from impacting or corroding the main shaft 33, thus ensuring the normal operation of the vibrating screen. By providing the protective seat 37, the eccentric block 34 and the turntable 35 are further prevented from being thrown out due to excessive centrifugal force, avoiding potential damage to surrounding equipment and personnel caused by the flying off of parts.

[0027] Preferably, the device also includes a spring support 4, which is fixed to the outside of the screen box 1 by a fifth fastening bolt 41. The spring support 4 is fixed by the fifth fastening bolt 41, further avoiding the problem of deformation of the connection surface caused by residual stress from welding.

[0028] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without any inventive effort, and these embodiments will all fall within the scope of protection of this utility model.

Claims

1. A support structure for a biaxial vibrating screen, characterized in that, The device includes a screen box, a support plate, and two sets of excitation units. The support plate is fixed to both sides of the screen box by a first fastening bolt. The two sets of excitation units are arranged one after the other on the support plate and located above the screen box. Each excitation unit includes a bearing seat, a bearing body, a main shaft, and an eccentric structure. The bearing seat is fixed to the support plate by a second fastening bolt. The bearing body is located inside the bearing seat. Both ends of the main shaft are engaged with the bearing body. The eccentric structure is located at both ends of the main shaft.

2. The support structure of a biaxial vibrating screen according to claim 1, characterized in that, The screen box includes side plates, at least one layer of screen frame and screen mesh. The screen frame is fixed between the side plates by a third fastening bolt, and the screen mesh is fixed on the screen frame.

3. The support structure of a biaxial vibrating screen according to claim 2, characterized in that, The support plate is secured to the outside of the side plate by at least three rows of the first fastening bolts.

4. The support structure of a biaxial vibrating screen according to claim 2, characterized in that, The screen box also includes multiple gaskets, which are evenly distributed on the screen mesh. The gaskets are fixed to the screen mesh and the screen frame by a fourth fastening bolt.

5. The support structure of a biaxial vibrating screen according to claim 2, characterized in that, The eccentric structure includes an eccentric block and a turntable. The turntable is fixed to the end of the main shaft and is located on the outside of the side plate. A receiving groove is formed on the end face of the turntable, and the eccentric block is fixed in the receiving groove.

6. The support structure of a biaxial vibrating screen according to claim 5, characterized in that, The excitation unit also includes a bushing and a protective seat. The bushing is located on the outside of the main shaft, and both ends of the bushing are fixedly connected to the bearing seat. The protective seat is fixed to the side plate, and a limit hole is formed on the protective seat. The turntable is located in the limit hole.

7. The support structure of a biaxial vibrating screen according to claim 1, characterized in that, It also includes a spring support, which is fixed to the outside of the screen box by a fifth fastening bolt.

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