A screening device for road and bridge construction materials
By introducing a corrugated screen and an adaptive leveling mechanism into the screening equipment, the problem of large workload in adjusting the screen level is solved, achieving high screening efficiency and uniform wear, and simplifying the screening operation on the construction site.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- ZHONG STEEL SHIBAJU GRP NO 2 ENG CO LTD
- Filing Date
- 2024-10-08
- Publication Date
- 2026-05-26
AI Technical Summary
In complex and ever-changing construction environments, adjusting the level of the screens in screening equipment is a labor-intensive task that relies heavily on the operator's experience, resulting in low screening efficiency and the possibility that the screens may not be perfectly level, thus affecting construction efficiency.
The road and bridge construction material screening device includes a frame, vibrating components, and screening components. The screening components consist of a base shaft, elastic components, and telescopic rods. Through a wave-shaped design and an adaptive leveling mechanism, the screen leveling work is simplified, screening efficiency is improved, and adaptive adjustment is made during use to avoid material accumulation.
It simplifies the screen leveling process, improves screening efficiency, adaptively adjusts to avoid material accumulation, reduces the space occupied by the device, and achieves uniform wear and cleaning by rotating the screen position, further improving screening efficiency.
Smart Images
Figure CN119186995B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of screening equipment technology, and in particular to a screening device for road and bridge construction materials. Background Technology
[0002] In civil engineering, screening is an indispensable part. When screening sand and gravel, it is necessary to ensure that the material is evenly distributed on the screen plate to maintain maximum screening efficiency.
[0003] However, working in complex and ever-changing construction environments often requires frequent relocation to adapt to different work sites. For example, in the case of on-site excavation, crushing, and screening, each time the equipment is changed, the workers need to adjust the outriggers to keep the screen level (if the level is not adjusted, the material will accumulate on one side while the other side is empty). This not only requires repeated adjustments to the height of one or more outriggers, which greatly increases the workload and affects the on-site screening efficiency, but also depends on the experience and skill level of the operators, which may result in the screen not being able to reach a completely level state.
[0004] The information disclosed in the background section of this invention is intended only to enhance the understanding of the general background of this invention, and should not be construed as an admission or in any way implying that such information constitutes prior art known to those skilled in the art. Summary of the Invention
[0005] Therefore, it is necessary to provide a screening device for road and bridge construction materials to address the problem of the large workload involved in adjusting the level of current screening equipment.
[0006] The above objectives are achieved through the following technical solutions:
[0007] A screening device for road and bridge construction materials includes a frame, a vibrating element, and a screening assembly. The vibrating element is connected to the frame. The screening assembly includes a base shaft, a first screen, a second screen, a first elastic element, a first telescopic rod, a second elastic element, and a second telescopic rod. The base shaft is rotatably connected to the frame, and its axis is arranged along the front-rear direction. The first screen and the second screen are respectively connected to the left and right sides of the base shaft. Both the first screen and the second screen are elastic, and their initial state is wavy. The first elastic element is connected to one end of the first screen along the front-rear direction, and one end of the first elastic element is connected to the base shaft. The initial state of the first elastic element is a wave shape matching that of the first screen. The first telescopic rod has one end rotatably connected to the frame, and the other end rotatably connected to the other end of the first elastic element. The second elastic element is connected to one end of the second screen in the front-back direction, and one end of the second elastic element is connected to the base shaft. The second elastic element is wavy and matches the second screen. One end of the second telescopic rod is rotatably connected to the frame, and the other end of the second telescopic rod is rotatably connected to the other end of the second elastic element. Both the first and second telescopic rods are provided with at least one locking element. When the first and second screens are kept horizontal, the first telescopic rod stretches the first elastic element flat, and the second telescopic rod stretches the second elastic element flat.
[0008] Furthermore, the base shaft is slidable in the vertical direction on the frame.
[0009] Furthermore, there are multiple screening components, which are arranged at intervals along the vertical direction.
[0010] Furthermore, the upper end of the first telescopic rod in the lower screening assembly is rotatably connected to the base shaft in the upper screening assembly, and the lower end of the second telescopic rod in the upper screening assembly is rotatably connected to the base shaft in the lower screening assembly.
[0011] Furthermore, there are two of each of the first elastic element and the second elastic element. The two first elastic elements are located on the front and rear sides of the first screen, respectively, and the two second elastic elements are located on the front and rear sides of the second screen, respectively.
[0012] Furthermore, there are two of each of the first and second telescopic rods. The two first telescopic rods are located on the front and rear sides of the first screen, and the two first telescopic rods correspond one-to-one with the two first elastic elements. The two second telescopic rods are located on the front and rear sides of the second screen, and the two second telescopic rods correspond one-to-one with the two second elastic elements.
[0013] Furthermore, the first screen is provided with a first rigid boss and two first flexible bosses. The first rigid boss is connected to the side of the first screen away from the base shaft, and the two first flexible bosses are respectively connected to the front and rear sides of the first screen. The second screen also has a second rigid boss and two second flexible bosses. The second rigid boss is connected to the side of the second screen away from the base shaft, and the two second flexible bosses are respectively connected to the front and rear sides of the second screen.
[0014] Furthermore, the upper ends of the first rigid boss and the first flexible boss are both located at the upper end of the first screen, and the lower ends of the first rigid boss and the first flexible boss are both located at the lower end of the first screen; the upper ends of the second rigid boss and the second flexible boss are both located at the upper end of the second screen, and the lower ends of the second rigid boss and the second flexible boss are both located at the lower end of the second screen.
[0015] Furthermore, the screening assembly also includes a limiting member, which is sleeved on the base shaft and connected to the frame, with one end of the first telescopic rod and one end of the second telescopic rod both located between the limiting member and the frame.
[0016] Furthermore, there are two vibrating elements, which are symmetrically arranged on the left and right sides of the frame.
[0017] The beneficial effects of this invention are:
[0018] 1. By setting up the screening components, this invention not only simplifies the leveling of the screen and improves screening efficiency, but also allows for adaptive adjustment during device use, preventing material from accumulating on one side and further improving screening efficiency.
[0019] 2. After using this invention for a period of time, rotate the base shaft 180° to swap the positions of the first and second screens and turn the other side upward. This swaps the positions of the wave crests and troughs, making the wear more uniform. At the same time, when the reverse side is used, the material vibration and falling can shake off the blockage material that was previously stuck on the front of the screen, thus cleaning the screen and reducing screen blockage and debris, which reduces efficiency.
[0020] 3. After a period of use, the base shaft is rotated 180°. During the rotation, the first and second elastic elements contract under their own elastic force, thereby reducing the width of the first and second screens. The base shaft can be rotated 180° in a very small space, allowing a smaller distance to be set between the upper and lower screening components. The rotation requirement can be met without setting an excessively large frame, which helps to reduce the space occupied by the device. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of the structure of the road and bridge construction material screening device according to an embodiment of the present invention;
[0022] Figure 2 This is a three-dimensional schematic diagram of a multi-layer screening assembly according to an embodiment of the present invention, wherein the first screen and the second screen are in a horizontal state;
[0023] Figure 3 This is a front view of a multi-layer screening assembly according to an embodiment of the present invention, wherein the first screen and the second screen are in a horizontal state;
[0024] Figure 4 This is a three-dimensional schematic diagram of a single-layer screening component according to an embodiment of the present invention, wherein the first screen and the second screen are in a horizontal state;
[0025] Figure 5 This is a front view of a single-layer screening assembly according to an embodiment of the present invention, wherein the first screen and the second screen are in a horizontal state;
[0026] Figure 6 This is a three-dimensional schematic diagram of a single-layer screening component according to an embodiment of the present invention, wherein the first screen and the second screen are in an inclined state;
[0027] Figure 7 This is a front view of a single-layer screening component according to an embodiment of the present invention, wherein the first screen and the second screen are in an inclined state.
[0028] in:
[0029] 1. Frame; 2. Vibrating component; 3. Screening assembly; 31. Base shaft; 32. First screen; 321. First rigid boss; 322. First flexible boss; 33. Second screen; 331. Second rigid boss; 332. Second flexible boss; 34. First elastic component; 35. First telescopic rod; 36. Second elastic component; 37. Second telescopic rod; 38. Locking component; 39. Limiting component. Detailed Implementation
[0030] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
[0031] The component designations used in this document, such as "first" and "second," are merely for distinguishing the described objects and do not have any sequential or technical meaning. The terms "connection" and "linkage" used in this invention, unless otherwise specified, include both direct and indirect connections (linkages). In the description of this invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.
[0032] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0033] The following describes the road and bridge construction material screening device according to an embodiment of the present invention with reference to the accompanying drawings.
[0034] like Figures 1 to 7 As shown, the road and bridge construction material screening device of this embodiment includes a frame 1, a vibrating component 2, and a screening assembly 3. Wherein,
[0035] The frame 1 is welded from high-strength steel, which has good load-bearing capacity and stability. Adjustable support legs can also be designed at the bottom of the frame 1 to adjust the overall level of the device under different terrains and working conditions, so as to ensure efficient screening operations.
[0036] Vibrating element 2 is installed at an appropriate position on the frame 1. It generates periodic vibration by driving the eccentric block to rotate through the motor, and transmits the vibration energy to the screening assembly 3. The number and position of vibrating element 2 are determined according to the specific size of the screening device and the screening requirements. Usually, one vibrating element 2 is installed on each side of the frame 1 and the two vibrating elements 2 are arranged symmetrically to ensure that the force on both sides of the screening assembly 3 is uniform and to improve the screening efficiency.
[0037] Screening component 3 includes:
[0038] The base shaft 31 is set along the front-to-back direction, and both ends of the base shaft 31 are fixed to the frame 1 by bearings to ensure that the base shaft 31 can rotate smoothly.
[0039] The first screen 32 and the second screen 33 are respectively connected to the left and right sides of the base shaft 31 (in the attached figure, the first screen 32 is located on the left side of the base shaft 31, and the second screen 33 is located on the right side of the base shaft 31). Both the first screen 32 and the second screen 33 are elastic, and the initial state (the state without external force) of the first screen 32 and the second screen 33 is wavy. The wavy design allows the first screen 32 and the second screen 33 to store energy after being stretched. The aperture, weight, length and width of the first screen 32 and the second screen 33 are the same, so that the first screen 32 and the second screen 33 can maintain balance when they are not subjected to external force.
[0040] The first elastic element 34 and the second elastic element 36 are both wave-shaped springs (e.g., Figure 6 and Figure 7 As shown, when the first elastic element 34 and the second elastic element 36 are not subjected to external force, both the first elastic element 34 and the second elastic element 36 are wavy. The first elastic element 34 is connected to the front end of the first screen 32, and the length direction of the first elastic element 34 is set along the width direction of the first screen 32. One end of the first elastic element 34 is connected to the base shaft 31. The second elastic element 36 is connected to the front end of the second screen 33, and the length direction of the second elastic element 36 is set along the width direction of the second screen 33. One end of the second elastic element 36 is connected to the base shaft 31. The wavy design allows the first elastic element 34 and the second elastic element 36 to store energy after being stretched. When the first elastic element 34 is stretched, the first elastic element 34 drives... The first screen 32 is generally flat. When the first elastic member 34 contracts into a wavy shape, the first screen 32 returns to a wavy shape under its own elastic force, so that the first screen 32 has multiple peaks and troughs, thereby blocking the material from moving in the left and right directions and preventing the material from accumulating on the first screen 32 or one place on the first screen 32. Similarly, when the second elastic member 36 is stretched, the second elastic member 36 causes the second screen 33 to be generally flat. When the second elastic member 36 contracts into a wavy shape, the second screen 33 returns to a wavy shape under its own elastic force, so that the second screen 33 has multiple peaks and troughs, thereby blocking the material from moving in the left and right directions and preventing the material from accumulating on the first screen 32 or one place on the second screen 33.
[0041] The first telescopic rod 35 and the second telescopic rod 37 are located above the first screen 32. The upper end of the first telescopic rod 35 is rotatably connected to the frame 1 and located directly above the base shaft 31. The lower end of the first telescopic rod 35 is connected to the free end of the first elastic member 34. The second telescopic rod 37 is located below the second screen 33. The lower end of the first telescopic rod 35 is rotatably connected to the frame 1 and located directly below the base shaft 31. The lower end of the second telescopic rod 37 is connected to the free end of the second elastic member 36. Both the first telescopic rod 35 and the second telescopic rod 37 are provided with at least one locking member 38.
[0042] When the device is tilted, a level is set on the first screen 32 or the second screen 33 and the locking of the first telescopic rod 35 and the second telescopic rod 37 is released. According to the state of the level, the filter screen is pressed down or raised until the level shows that it is in a horizontal state. After the first elastic member 34 and the second elastic member 36 are stretched flat, the first telescopic rod 35 and the second telescopic rod 37 are locked, thus completing the leveling of the first screen 32 and the second screen 33.
[0043] When the device is in use, if the material on the first screen 32 is heavier than the material on the second screen 33, the base shaft 31 rotates toward the first screen 32 as follows: Figure 7 In the middle, the base shaft 31 rotates counterclockwise. Since the lengths of the first telescopic rod 35 and the second telescopic rod 37 are fixed, the first elastic element 34 and the second elastic element 36 contract into a wave shape under their own elastic force. The first screen 32 and the second screen 33, no longer restricted by the first elastic element 34 and the second elastic element 36, return to their wave shape, so that both the first screen 32 and the second screen 33 have multiple peaks and troughs, thereby blocking the raw material from moving towards the first screen 32 and preventing material accumulation on the first screen 32. When the material on the second screen 33 is heavier than the material on the first screen 32, the base shaft 31 tends to rotate towards the second screen 33. Figure 5 In the middle, the base shaft 31 has a tendency to rotate clockwise, but because the lengths of the first telescopic rod 35 and the second telescopic rod 37 are fixed, and the first elastic element 34 and the second elastic element 36 are stretched flat and cannot be stretched flat further, the base shaft 31 remains horizontal under the pulling force of the first elastic element 34, the second elastic element 36, the first telescopic rod 35 and the second telescopic rod 37, thus preventing the material from accumulating on the second screen 33.
[0044] After a period of use, release the locking of the first telescopic rod 35 and the second telescopic rod 37, rotate the base shaft 31 180°, so that the positions of the first screen 32 and the second screen 33 are swapped and the other side faces upward. The positions of the crests and troughs are reversed to make the wear more uniform. At the same time, when the material vibrates and falls, it can shake off the blockage material that was previously stuck on the front of the screen, which plays a cleaning role. Moreover, during the rotation, the first elastic element 34 and the second elastic element 36 contract under their own elastic force, and the first screen 32 and the second screen 33 return to the wave shape under their own elastic force, so that the width of the first screen 32 and the second screen 33 is reduced. The base shaft 31 can be rotated 180° in a smaller space, so that a smaller distance can be set between the screening components 3 located in the upper layer and the screening components 3 located in the lower layer. The rotation requirements can be met without setting an excessively large frame 1, which helps to reduce the space occupied by the device.
[0045] The road and bridge construction material screening device of this invention simplifies the screen leveling work and improves screening efficiency by setting the screening component 3. Moreover, it can adaptively adjust during the use of the device to avoid material accumulation on one side, further improving screening efficiency.
[0046] In one embodiment, the base shaft 31 is slidable in the vertical direction on the frame 1. By adjusting the position of the base shaft 31 on the frame 1 and the lengths of the first telescopic rod 35 and the second telescopic rod 37, the rotation angle of the first screen 32 and the second screen 33 can be controlled to avoid the first screen 32 and the second screen 33 from rotating too much and failing to perform screening work normally.
[0047] like Figures 1 to 3 As shown, in one embodiment, there are multiple screening components 3, which are arranged at intervals in the vertical direction. The upper end of the first telescopic rod 35 in the lower screening component 3 is rotatably connected to the base shaft 31 in the upper screening component 3, and the lower end of the second telescopic rod 37 in the upper screening component 3 is rotatably connected to the base shaft 31 in the lower screening component 3. It can be understood that multiple screening components 3 can perform screening operations simultaneously, thereby improving screening efficiency.
[0048] like Figure 6 As shown, in one embodiment, there are two first elastic elements 34 and two second elastic elements 36. One first elastic element 34 is connected to the front side of the first screen 32, and the other first elastic element 34 is connected to the rear side of the first screen 32. Similarly, one second elastic element 36 is connected to the front side of the second screen 33, and the other second elastic element 36 is connected to the rear side of the second screen 33. It can be understood that the arrangement of two first elastic elements 34 and two elastic elements 36 allows the first elastic elements 34 and two elastic elements 36 to drive the first screen 32 and the second screen 33 to move more smoothly and reliably.
[0049] like Figure 4 As shown, furthermore, there are two first telescopic rods 35 and two second telescopic rods 37. Each of the two first telescopic rods 35 corresponds to one of the two first elastic elements 34. One first telescopic rod 35 is located on the front side of the first screen 32 and is rotatably connected to the first elastic element 34 located on the front side of the first screen 32. The other first telescopic rod 35 is connected to the rear side of the first screen 32 and is rotatably connected to the first elastic element 34 located on the rear side of the first screen 32. Similarly, each of the two second telescopic rods 37 corresponds to one of the two second elastic elements 36. One second telescopic rod 37 is located on the front side of the second screen 33 and is rotatably connected to the second elastic element 36 located on the front side of the second screen 33. The other second telescopic rod 37 is connected to the rear side of the second screen 33 and is rotatably connected to the second elastic element 36 located on the rear side of the second screen 33. It can be understood that the arrangement of two first telescopic rods 35 and two telescopic rods 37 allows the first telescopic rods 35 and 37 to drive the first elastic elements 34 and 36 more smoothly and reliably.
[0050] like Figures 1 to 7 As shown, in one embodiment, the first screen 32 is provided with a first rigid boss 321 and two first flexible bosses 322. The first rigid boss 321 is connected to the side of the first screen 32 away from the base shaft 31, as shown in the figure. Figure 4 As shown on the left, one first flexible boss 322 is connected to the front side of the first screen 32, and the other first flexible boss 322 is connected to the rear side of the first screen 32; the second screen 33 also has a second rigid boss 331 and two second flexible bosses 332, the second rigid boss 331 being connected to the side of the second screen 33 away from the base shaft 31, as shown in the diagram. Figure 4 As shown on the right side, one of the second flexible protrusions 332 is connected to the front side of the second screen 33, and the other second flexible protrusion 332 is connected to the rear side of the second screen 33.
[0051] Furthermore, the upper ends of the first rigid boss 321 and the first flexible boss 322 are both located at the upper end of the first screen 32, and the lower ends of the first rigid boss 321 and the first flexible boss 322 are both located at the lower end of the first screen 32; the upper ends of the second rigid boss 331 and the second flexible boss 332 are both located at the upper end of the second screen 33, and the lower ends of the second rigid boss 331 and the second flexible boss 332 are both located at the lower end of the second screen 33.
[0052] It is understandable that by setting the first rigid boss 321 and the two first flexible bosses 322, the edge height of the first screen 32 is increased, reducing the leakage of material from the edge of the first screen 32. Similarly, by setting the second rigid boss 331 and the two second flexible bosses 332, the edge height of the second screen 33 is increased, reducing the leakage of material from the edge of the second screen 33.
[0053] like Figures 1 to 7 As shown, in one embodiment, the screening assembly 3 further includes a limiting member 39, which is sleeved on the base shaft 31 and connected to the frame 1. One end of the first telescopic rod 35 and the second telescopic rod 37 are both located between the limiting member 39 and the frame 1. It can be understood that the limiting member 39 prevents the first telescopic rod 35 and the second telescopic rod 37 from detaching from the base shaft 31.
[0054] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0055] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.
Claims
1. A road and bridge construction raw material screening device, characterized by, include: Rack (1), Vibrating element (2), the vibrating element (2) is connected to the frame (1); The screening assembly (3) includes a base shaft (31), a first screen (32), a second screen (33), a first elastic element (34), a first telescopic rod (35), a second elastic element (36), and a second telescopic rod (37). The base shaft (31) is rotatably connected to the frame (1). The axis of the base shaft (31) is arranged along the front-back direction. The first screen (32) and the second screen (33) are respectively connected to the left and right sides of the base shaft (31). Both the first screen (32) and the second screen (33) are elastic, and the initial state of the first screen (32) and the second screen (33) is wavy. The first elastic element (34) is connected to one end of the first screen (32) along the front-back direction, and one end of the first elastic element (34) is connected to the base shaft (31). The initial state of the first elastic element (34) is a wavy shape matching the first screen (32). One end of the first telescopic rod (35) is rotatably connected to the base shaft (31). The frame (1) is described above. The other end of the first telescopic rod (35) is rotatably connected to the end of the first elastic member (34) away from the base shaft (31). The second elastic member (36) is connected to the end of the second screen (33) in the front-back direction, and one end of the second elastic member (36) is connected to the base shaft (31). The second elastic member (36) is wavy and matches the second screen (33). One end of the second telescopic rod (37) is rotatably connected to the frame (1), and the other end of the second telescopic rod (37) is rotatably connected to the end of the second elastic member (36) away from the base shaft (31). The first telescopic rod (35) and the second telescopic rod (37) are each provided with at least one locking member (38). When the first screen (32) and the second screen (33) are kept in a horizontal state, the first telescopic rod (35) stretches the first elastic member (34) flat, and the second telescopic rod (37) stretches the second elastic member (36) flat.
2. The road and bridge construction raw material screening device according to claim 1, characterized in that, The base shaft (31) can slide along the vertical direction on the frame (1).
3. The road and bridge construction raw material screening device according to claim 2, characterized in that, There are multiple screening components (3), and the multiple screening components (3) are arranged at intervals along the vertical direction.
4. The road and bridge construction raw material screening device according to claim 3, characterized in that, The upper end of the first telescopic rod (35) in the lower screening assembly (3) is rotatably connected to the base shaft (31) in the upper screening assembly (3), and the lower end of the second telescopic rod (37) in the upper screening assembly (3) is rotatably connected to the base shaft (31) in the lower screening assembly (3).
5. The road and bridge construction material screening device according to claim 1, characterized in that, There are two of each of the first elastic element (34) and the second elastic element (36). The two first elastic elements (34) are located on the front and rear sides of the first screen (32) respectively, and the two second elastic elements (36) are located on the front and rear sides of the second screen (33) respectively.
6. The road and bridge construction raw material screening device according to claim 5, characterized in that, There are two of each of the first telescopic rod (35) and the second telescopic rod (37). The two first telescopic rods (35) are located on the front and rear sides of the first screen (32) respectively, and the two first telescopic rods (35) correspond one-to-one with the two first elastic elements (34). The two second telescopic rods (37) are located on the front and rear sides of the second screen (33) respectively, and the two second telescopic rods (37) correspond one-to-one with the two second elastic elements (36).
7. The road and bridge construction raw material screening device according to claim 1, characterized in that, The first screen (32) is provided with a first rigid boss (321) and two first flexible bosses (322). The first rigid boss (321) is connected to the side of the first screen (32) away from the base shaft (31), and the two first flexible bosses (322) are respectively connected to the front and rear sides of the first screen (32). The second screen (33) also has a second rigid boss (331) and two second flexible bosses (332). The second rigid boss (331) is connected to the side of the second screen (33) away from the base shaft (31), and the two second flexible bosses (332) are respectively connected to the front and rear sides of the second screen (33).
8. The road and bridge construction raw material screening device according to claim 7, characterized in that, The upper end of the first rigid boss (321) and the upper end of the first flexible boss (322) are both located at the upper end of the first screen (32), and the lower end of the first rigid boss (321) and the lower end of the first flexible boss (322) are both located at the lower end of the first screen (32). The upper ends of the second rigid boss (331) and the second flexible boss (332) are both located at the upper end of the second screen (33), and the lower ends of the second rigid boss (331) and the second flexible boss (332) are both located at the lower end of the second screen (33).
9. The road and bridge construction raw material screening device according to claim 1, characterized in that, The screening assembly (3) also includes a limiting member (39), which is sleeved on the base shaft (31) and connected to the frame (1). One end of the first telescopic rod (35) and one end of the second telescopic rod (37) are both located between the limiting member (39) and the frame (1).
10. The road and bridge construction raw material screening device according to claim 1, characterized in that, There are two vibrating elements (2), which are symmetrically arranged on the left and right sides of the frame (1).