Gravel screening device for road maintenance

Abstract

The utility model relates to the technical field of road maintenance, and discloses a road maintenance gravel screening device which comprises a frame body, a motor is fixedly installed on the frame body, a cam is fixedly installed at the end of an output shaft of the motor, a protective frame body is further arranged above the frame body, a screen plate is installed in the protective frame body, and a motor is fixedly installed on the screen plate. A connecting column and a stable spring are fixedly installed on the side face of the protective frame body, and the end of the stable spring is fixedly connected with the frame body. According to the road maintenance gravel screening device, the screen plate is mounted on the protective frame body, so that when the screen plate vibrates and screens gravel back and forth, the phenomenon that the unscreened gravel on the upper surface of the screen plate falls off can be avoided due to the separation effect of the side wall of the protective frame body, and the screening effect of the whole device is ensured; and an auxiliary assembly is further arranged on the protection frame body, the connection state between the sliding plate and the protection frame body and the connection state between the baffle and the protection frame body can be adjusted according to different actual scenes, and therefore the actual application requirement is met.

Description

Technical Field

[0001] This utility model relates to the field of road maintenance technology, specifically to a road maintenance crushed stone screening device. Background Technology

[0002] In road maintenance, crushed stone layers, used as road base or subbase layers, can improve the compressive strength and drainage performance of the road surface, extend the road life, and the crushed stone needs to be screened before use.

[0003] When a screening machine with a horizontally placed screen plate vibrates back and forth to screen, the gravel on the surface of the screen plate moves back and forth, which can easily cause unscreened gravel to fall off, affecting the screening effect and thus the subsequent road maintenance effect. To address this issue, we have proposed a road maintenance gravel screening device to solve the above problems. Utility Model Content

[0004] In view of the shortcomings of the existing technology, this utility model provides a road maintenance crushed stone screening device, which solves the problems mentioned in the background.

[0005] This utility model provides the following technical solution: a road maintenance crushed stone screening device, comprising: a frame, on which a motor is fixedly installed, and a cam is fixedly installed at the end of the motor output shaft; a protective frame is also provided above the frame, and a screen plate is installed inside the protective frame; connecting columns and stabilizing springs are fixedly installed on the sides of the protective frame, the end of the stabilizing spring is fixedly connected to the frame, and the connecting columns are slidably connected to the frame; an inclined feeding plate is also fixedly installed on the frame, and the feeding plate is located below the screen plate; the protective frame is also provided with auxiliary components and linkage components; the auxiliary components include components slidably connected to the protective frame. The auxiliary components include a U-shaped block, a sliding plate fixedly connected to the U-shaped block, a limiting plate fixedly connected to the protective frame, an insert block slidably disposed inside the protective frame, a baffle disposed on the side of the protective frame away from the sliding plate, and a hinge for realizing the movable connection between the baffle and the protective frame. The auxiliary components also include a screw. The linkage components include a first rack and a second rack slidably disposed inside the protective frame, and a central gear rotatably disposed inside the protective frame. A top block is fixedly installed on the upper end of the first rack, and a return spring is fixedly installed on the lower surface of the top block. An L-shaped slide rod is fixedly installed on the side of the second rack, and the end of the L-shaped slide rod away from the second rack is fixedly connected to the insert block.

[0006] Preferably, the side of the baffle adjacent to the insert block is provided with an L-shaped slot, and the end of the L-shaped slot is designed to be open.

[0007] Preferably, the screw is threadedly connected to the protective frame, and the U-shaped block has an auxiliary hole for the screw to pass through.

[0008] Preferably, a knob is fixedly installed at the upper end of the screw, and the outer surface of the knob is provided with anti-slip texture.

[0009] Preferably, the top block is located below the screw, and the first rack is located in the internal cavity of the return spring.

[0010] Preferably, the protective frame has a threaded hole for connecting with the screw, and the protective frame also has a circular cavity for accommodating the top block and the return spring.

[0011] Preferably, the circular cavity is located below the threaded hole, and the size of the circular cavity is larger than the size of the screw, while the size of the top block is smaller than the size of the threaded hole.

[0012] Preferably, the first rack and the second rack are respectively disposed on both sides of the central gear, and both the first rack and the second rack can be meshed with the central gear.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. This road maintenance gravel screening device, by installing the screen plate on the protective frame, prevents unscreened gravel from falling off the upper surface of the screen plate when the screen plate vibrates back and forth to screen the gravel due to the obstruction effect of the side wall of the protective frame, thus ensuring the screening effect of the overall device. In addition, auxiliary components are also set on the protective frame, and the connection between the sliding plate and the baffle and the protective frame can be adjusted according to different actual scenarios to meet the actual application requirements.

[0015] 2. This road maintenance gravel screening device, by setting a linkage component inside the protective frame, further connects the sliding plate and the baffle. Therefore, the position of the baffle can be adjusted by the user to change the connection between the sliding plate and the protective frame, making it easier for the user to remove large gravel located on the surface of the screen plate that cannot pass through the screening holes of the screen plate, thus further improving the practicality of the overall device. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the overall structure of this utility model from another perspective;

[0018] Figure 3 This is an exploded view of the structure of the open box body of this utility model;

[0019] Figure 4 This is a cross-sectional schematic diagram of the open box structure of this utility model;

[0020] Figure 5This is a schematic diagram of the connection of the central gear structure of this utility model.

[0021] In the diagram: 1. Frame; 2. Motor; 3. Cam; 4. Protective frame; 5. Connecting column; 6. Stabilizing spring; 7. Screen plate; 8. Feeding plate; 9. Auxiliary components; 91. Slide plate; 92. Limiting plate; 93. U-shaped block; 94. Screw; 95. Baffle; 96. Insert block; 97. Hinge; 10. Linkage component; 101. Top block; 102. Return spring; 103. First rack; 104. Central gear; 105. Second rack; 106. L-shaped slide bar. Detailed Implementation

[0022] 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.

[0023] Please see Figure 1-5 A road maintenance crushed stone screening device includes: a frame 1, a motor 2 fixedly installed on the frame 1, a cam 3 fixedly installed at the end of the output shaft of the motor 2, a protective frame 4 above the frame 1, a screen plate 7 installed inside the protective frame 4, a connecting column 5 and a stabilizing spring 6 fixedly installed on the sides of the protective frame 4 respectively, the end of the stabilizing spring 6 being fixedly connected to the frame 1, the connecting column 5 being slidably connected to the frame 1, an inclined feeding plate 8 being fixedly installed on the frame 1 and located below the screen plate 7, and auxiliary components 9 and linkage components 10 being provided on the protective frame 4.

[0024] The auxiliary component 9 includes a U-shaped block 93 slidably connected to the protective frame 4, a slide plate 91 fixedly connected to the U-shaped block 93, a limiting plate 92 fixedly connected to the protective frame 4, an insert 96 slidably disposed inside the protective frame 4, a baffle 95 disposed on the side of the protective frame 4 away from the slide plate 91, and a hinge 97 for realizing the movable connection between the baffle 95 and the protective frame 4. The auxiliary component 9 also includes a screw 94. An L-shaped slot is provided on the side adjacent to the baffle 95 and the insert 96. The end of the L-shaped slot is designed to be open. The screw 94 is threadedly connected to the protective frame 4. An auxiliary hole is provided on the U-shaped block 93 for the screw 94 to pass through. The limiting plate 92 can be used to limit the position of the slide plate 91 and the U-shaped block 93, so that the auxiliary hole on the U-shaped block 93 can be aligned with the threaded hole provided on the protective frame 4 for connection with the screw 94, so as to connect using the screw 94. A knob is fixedly installed on the upper end of the screw 94. The outer surface of the knob is provided with anti-slip texture for easy operation by the user.

[0025] The linkage assembly 10 includes a first rack 103 and a second rack 105 slidably disposed inside the protective frame 4, and a central gear 104 rotatably disposed inside the protective frame 4. A top block 101 is fixedly installed on the upper end of the first rack 103, and a return spring 102 is fixedly installed on the lower surface of the top block 101. An L-shaped slide rod 106 is fixedly installed on the side of the second rack 105, and the end of the L-shaped slide rod 106 away from the second rack 105 is fixedly connected to the insert block 96. The top block 101 is located below the screw 94, and the first rack 103 is located in the cavity inside the return spring 102. The protective frame 4 has an opening for engaging with the screw 94. The screw 94 is connected to a threaded hole, and the protective frame 4 is also provided with a circular cavity for accommodating the top block 101 and the return spring 102. The circular cavity is located below the threaded hole, and the size of the circular cavity is larger than the size of the screw 94, while the size of the top block 101 is smaller than the size of the threaded hole. This allows the screw 94 to be inserted into the circular cavity while ensuring that the top block 101 can slide into the threaded hole, avoiding interference. The first rack 103 and the second rack 105 are respectively provided on both sides of the central gear 104, and both the first rack 103 and the second rack 105 can mesh with the central gear 104.

[0026] Working principle: During actual road maintenance and crushed stone screening, the crushed stone is placed on the screen plate 7. Then, the motor 2 is started, causing the cam 3 at the output end of the motor 2 to rotate. This causes the raised and smooth parts of the cam 3 to switch back and forth, contacting the protective frame 4. The connecting column 5, fixed on the protective frame 4, is slidably connected to the frame 1. A stabilizing spring 6 further connects the protective frame 4 and the frame 1. Therefore, after the cam 3 rotates, the protective frame 4 drives the screen plate 7 inside to vibrate back and forth, thus screening the crushed stone. Smaller gravel particles are screened through the screening holes on the screen plate 7 and discharged through the inclined feed plate 8 below the screen plate 7, completing the gravel screening. When it is necessary to remove gravel that cannot be screened from the upper surface of the screen plate 7, the screw 94 is rotated to remove it from the protective frame 4. The top block 101 is no longer restricted. Under the action of the reset springs 102, which are fixedly connected to the top block 101 and the protective frame 4 at both ends, the top block 101 and the first rack 103 slide upwards, interacting with the first rack 103. The meshing central gear 104 rotates accordingly, and the second rack 105, located on the other side of the central gear 104 and meshing with it, drives the L-shaped slide bar 106 and the insert block 96 at the other end of the L-shaped slide bar 106 to slide downwards simultaneously, so that the insert block 96 slides down to the end opening of the L-shaped slot on the baffle 95. At this time, the baffle 95, which is movably connected to the protective frame 4 via the hinge 97, can rotate, and then push the slide plate 91 to push the gravel on the surface of the sieve plate 7. By opening the baffle... The port formed on the protective frame 4 after 95 is discharged; while the screw 94 passes through the U-shaped block 93 to fix the slide plate 91, the top block 101 is squeezed by the end face of the screw 94, which drives the first rack 103 to slide downward. Then, under the transmission of the central gear 104, it drives the second rack 105, the L-shaped slide bar 106 and the insert 96 to slide upward, so that the insert 96 slides up to the closed end of the L-shaped slot on the baffle 95, thereby restricting the state of the baffle 95 and closing the open end of the protective frame 4.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A road maintenance crushed stone screening device, characterized in that, include: A frame (1) is provided, on which a motor (2) is fixedly installed. A cam (3) is fixedly installed at the end of the output shaft of the motor (2). A protective frame (4) is also provided above the frame (1). A screen plate (7) is installed inside the protective frame (4). A connecting column (5) and a stabilizing spring (6) are fixedly installed on the side of the protective frame (4). The end of the stabilizing spring (6) is fixedly connected to the frame (1). The connecting column (5) is slidably connected to the frame (1). An inclined feeding plate (8) is also fixedly installed on the frame (1), and the feeding plate (8) is located below the screen plate (7). An auxiliary component (9) and a linkage component (10) are also provided on the protective frame (4). The auxiliary component (9) includes a U-shaped block (93) slidably connected to the protective frame (4), a sliding plate (91) fixedly connected to the U-shaped block (93), a limiting plate (92) fixedly connected to the protective frame (4), an insert (96) slidably disposed inside the protective frame (4), a baffle (95) disposed on the side of the protective frame (4) away from the sliding plate (91), and a hinge (97) for realizing the movable connection between the baffle (95) and the protective frame (4). The auxiliary component (9) also includes a screw (94). The linkage assembly (10) includes a first rack (103) and a second rack (105) slidably disposed inside the protective frame (4), and a central gear (104) rotatably disposed inside the protective frame (4). A top block (101) is fixedly installed on the upper end of the first rack (103), and a return spring (102) is fixedly installed on the lower surface of the top block (101). An L-shaped slide rod (106) is fixedly installed on the side of the second rack (105), and the end of the L-shaped slide rod (106) away from the second rack (105) is fixedly connected to the insert block (96).

2. The road maintenance crushed stone screening device according to claim 1, characterized in that, The side of the baffle (95) adjacent to the insert (96) is provided with an L-shaped slot, the end of which is designed to be open.

3. The road maintenance crushed stone screening device according to claim 1, characterized in that, The screw (94) is threadedly connected to the protective frame (4), and the U-shaped block (93) has an auxiliary hole for the screw (94) to pass through.

4. The road maintenance crushed stone screening device according to claim 1, characterized in that, A knob is fixedly installed at the upper end of the screw (94), and the outer surface of the knob is provided with anti-slip texture.

5. The road maintenance crushed stone screening device according to claim 1, characterized in that, The top block (101) is located below the screw (94), and the first rack (103) is located in the cavity inside the return spring (102).

6. The road maintenance crushed stone screening device according to claim 1, characterized in that, The protective frame (4) has a threaded hole for connecting with the screw (94), and the protective frame (4) also has a circular cavity for accommodating the top block (101) and the return spring (102).

7. The road maintenance crushed stone screening device according to claim 6, characterized in that, The circular cavity is located below the threaded hole, and the size of the circular cavity is larger than the size of the screw (94), while the size of the top block (101) is smaller than the size of the threaded hole.

8. The road maintenance crushed stone screening device according to claim 1, characterized in that, The first rack (103) and the second rack (105) are respectively disposed on both sides of the central gear (104), and both the first rack (103) and the second rack (105) can mesh with the central gear (104).

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