Pressing mechanism for screen plate of vibrating screen

Abstract

The utility model discloses a hold-down mechanism for a sieve plate of a vibrating screen, which comprises a vibrating screen side plate, a sieve plate and a wedge block, the wedge block is of a trapezoidal structure, the hold-down mechanism further comprises a hold-down structure, and the hold-down structure comprises a mounting shaft; a mounting shaft is rotationally mounted on the vibrating screen side plate, one end of the mounting shaft extends to the inner side of the vibrating screen side plate and is provided with a main gear located above the wedge block, and the other end of the mounting shaft extends to the outer side of the vibrating screen side plate and is provided with a locking wheel and a rotating handle; a pushing rack matched with the main gear is arranged at the trapezoidal inclined face end of the wedge block, a crawler belt is rotationally arranged on the lower end face opposite to the inclined face end, and the main gear drives the wedge block to be slidably pressed on the sieve plate through the pushing rack. A one-way lock plate matched with the lock wheel and used for limiting one-way rotation of the lock wheel is elastically arranged on the outer side face of the vibrating screen side plate in an abutting mode. The locking wheel and the one-way locking plate are arranged, so that the pressing structure can be limited to drive the wedge block to move in one direction, and the wedge block can be prevented from retreating.

Description

A clamping mechanism for vibrating screen plates Technical Field

[0001] This utility model relates to the field of vibrating screen plate clamping technology, specifically a clamping mechanism for vibrating screen plates. Background Technology

[0002] A vibrating screen is a screening device that operates by utilizing the complex rotary vibration generated by a vibrator. It is widely used in industries such as mining, coal, metallurgy, and building materials. The screen plate, as a key component of the vibrating screen, directly affects the screening effect and the service life of the equipment due to its installation stability. Most existing vibrating screen plate clamping mechanisms use bolts for fixing. This method requires tools to tighten or loosen the bolts during installation and disassembly, which is cumbersome, time-consuming, and affects work efficiency. Furthermore, during long-term vibration, the bolts are prone to loosening, leading to problems such as screen plate displacement and swaying. Therefore, a new clamping structure is needed.

[0003] In the prior art, utility model patent CN202421021379.X discloses a vibrating screen wedge. The wedge presses against the screen plate, and a rack is machined on the top of the wedge. The upper part of the rack meshes with a gear, and a drive shaft is located at the center of the gear. The drive shaft passes through a through hole in the screen frame and is fitted with a counterweight block. The counterweight block is connected to the drive shaft by a set screw. The counterweight block consists of a counterweight arm A and a counterweight arm B forming an L-shaped structure, and the counterweight block is located on the thick end face of the wedge. In this vibrating screen wedge, the counterweight block also acts as a wrench when installing and removing the screen plate, eliminating the need for other tools. By rotating the counterweight block, the gear drives the rack, causing the wedge block to move and press the screen plate tightly. Due to the action of the counterweight block, the gap generated between the wedge block and the screen plate during screen plate vibration is compensated by the slight rotation of the counterweight block, preventing the screen plate from loosening. The counterweight block also provides a certain preload force on the screen plate from the wedge block.

[0004] The aforementioned patent provides a clamping structure that uses wedges to press the screen plate of a vibrating screen. Compared to bolt installation, this method is simpler and more convenient, and the weight of the counterweight can prevent the wedges from retracting. However, the vibration generated during the operation of the screen plate can easily cause the wedges to retract. When the counterweight corrects this retraction under its own weight, it will exert a swaying force on the counterweight, causing it to wobble and posing a certain safety hazard. Furthermore, the wedges may also detach along their width during vibration. Summary of the Invention

[0005] The purpose of this utility model is to provide a clamping mechanism for vibrating screen plates, which aims to improve the existing vibrating screen plate clamping structure. When the vibrating screen plate is working, the vibration can easily cause the wedge to retract, and there are certain safety hazards during use. At the same time, the wedge may also detach along its width direction during vibration.

[0006] This utility model is implemented as follows: A clamping mechanism for a vibrating screen plate includes a vibrating screen side plate, a screen plate, and a wedge. The wedge has a trapezoidal structure. The mechanism also includes a clamping structure, which includes a mounting shaft. The mounting shaft is rotatably mounted on the vibrating screen side plate. One end of the mounting shaft extends to the inner side of the vibrating screen side plate and is equipped with a main gear located above the wedge. The other end extends to the outer side of the vibrating screen side plate and is equipped with a locking wheel and a rotating handle. The trapezoidal inclined end of the wedge is equipped with a pushing rack adapted to the main gear. A track is rotatably mounted on the lower end face opposite the inclined end. The main gear drives the wedge to slide and clamp onto the screen plate by pushing the rack. A one-way locking plate adapted to the locking wheel is elastically abutted against the outer side of the vibrating screen side plate to restrict the one-way rotation of the locking wheel.

[0007] Preferably, the vibrating screen side plate further includes a mounting platform, and the mounting platform is provided on the inner side of the vibrating screen side plate, with the lower end face of the screen plate abutting against the upper end face of the mounting platform.

[0008] Preferably, the wedge further includes a rotating shaft, and the lower end face of the wedge corresponding to the inclined end face is provided with a mounting groove. Multiple rotating shafts are sequentially arranged in the mounting groove along its length direction, and the track is rotatably mounted through the multiple rotating shafts.

[0009] Preferably, it also includes a limiting plate, on which the limiting plate is detachably installed at the end face of the main gear away from the side plate of the vibrating screen, and the area of ​​the limiting plate covers the side of the wedge.

[0010] Preferably, the locking wheel includes irregular teeth, and a plurality of irregular teeth are sequentially arranged along its circumference on the outer ring side of the locking wheel; the one-way locking plate includes limiting teeth, and the side of the one-way locking plate near the locking wheel is provided with matching limiting teeth; the irregular teeth and the limiting teeth abut against each other on one side of the rotation direction in which the wedge is pressed by the main gear are curved abutted, and the other side abutted against each other is planar abutted.

[0011] Preferably, the one-way locking plate further includes a spring, and a mounting block is provided on the vibrating screen side plate above the one-way locking plate. One end of the spring is mounted on the mounting block, and the other end is mounted on the upper surface of the one-way locking plate. One end of the one-way locking plate is rotatably mounted on the vibrating screen side plate and elastically abuts against the locking wheel by the spring.

[0012] Preferably, it also includes a top rod, and the lower end face of the movable end of the one-way locking plate is provided with a top groove. The vibrating screen side plate is rotatably provided with a top rod located below the top groove. The movable end of the top rod can be lifted with the one-way locking plate and abut against the top groove.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This utility model can restrict the wedge block from moving in one direction by setting a locking wheel and a one-way locking plate, thereby preventing the wedge block from retracting.

[0015] 2. This utility model provides a limiting plate on the side of the main gear, which can limit the wedge block and prevent it from detaching from the side.

[0016] 3. By providing a track at the lower end of the wedge, this utility model can reduce the friction between the wedge and the screen plate, thus making the installation of the wedge easier. Attached Figure Description

[0017] Figure 1 is a schematic diagram of the installation structure of the clamping structure and wedge block of this utility model;

[0018] Figure 2 is a cross-sectional structural diagram of the wedge block of this utility model;

[0019] Figure 3 is a three-dimensional structural schematic diagram of the clamping structure of this utility model;

[0020] Figure 4 is a schematic diagram of the outer structure of the vibrating screen side plate of this utility model;

[0021] Figure 5 is a structural schematic diagram of point A in Figure 4 of this utility model.

[0022] In the diagram: 1. Vibrating screen side plate; 101. Mounting platform; 2. Screen plate; 3. Wedge block; 301. Push rack; 302. Mounting groove; 303. Rotating shaft; 304. Track; 4. Clamping structure; 401. Mounting shaft; 402. Main gear; 403. Locking wheel; 404. Rotating handle; 405. Limiting plate; 406. One-way locking plate; 407. Top groove; 408. Top rod; 409. Mounting block; 410. Spring; 411. Special-shaped tooth; 412. Limiting tooth. Detailed implementation method:

[0023] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] The following description, in conjunction with the accompanying drawings and specific embodiments, provides further details:

[0025] Example 1

[0026] As shown in Figures 1, 3, and 4, a clamping mechanism for a vibrating screen plate includes a vibrating screen side plate 1, a screen plate 2, a wedge block 3, and a clamping structure 4. The wedge block 3 has a trapezoidal structure. The vibrating screen side plate 1 also includes a mounting platform 101, which is provided on the inner side of the vibrating screen side plate 1. The lower end face of the screen plate 2 abuts against the upper end face of the mounting platform 101. The screen plate 2 is mounted on the mounting platform 101, and then the wedge block 3 is mounted on the upper end face of the screen plate 2. The clamping structure 4 includes a mounting shaft 401 and a limiting plate 405. The mounting shaft 401 is rotatably mounted on the vibrating screen side plate 1. One end of the mounting shaft 401 extends to the inner side of the vibrating screen side plate 1 and is provided with a main gear 402 located above the wedge block 3. The other end extends to the outer side of the vibrating screen side plate 1 and is provided with a locking wheel 403 and a rotating handle 404. The trapezoidal inclined end of the wedge 3 is equipped with a pushing rack 301 adapted to the main gear 402, and a track 304 is rotatably mounted on the lower end face opposite the inclined end. The main gear 402 drives the wedge 3 to slide and press against the screen plate 2 by pushing the rack 301. A limiting plate 405 is detachably installed on the end face of the main gear 402 away from the vibrating screen side plate 1, and the area of ​​the limiting plate 405 covers the side of the wedge 3. The limiting plate 405 can prevent the wedge 3 from detaching from the side. The main gear 402 on the pressing structure 4 rotates and drives the wedge 3 to move on the screen plate 2 through the pushing rack 301 on the inclined surface of the wedge 3. As the position of the main gear 402 on the inclined surface of the wedge 3 increases, the wedge 3 presses more firmly against the screen plate 2. The track 304 can reduce the friction between the wedge 3 and the screen plate 2, making it easier for the pressing structure 4 to drive the wedge 3 to press against the screen plate 2.

[0027] As shown in Figures 2, 4, and 5, the wedge block 3 also includes a rotating shaft 303. A mounting groove 302 is provided on the lower end face of the wedge block 3 corresponding to the inclined end face. Multiple rotating shafts 303 are sequentially arranged along the length of the mounting groove 302. The track 304 is rotatably mounted via these rotating shafts 303. The rotating shafts 303 on the wedge block 3 can drive the track 304 to rotate. Simultaneously, the track 304 increases the contact area between the lower end face of the wedge block 3 and the screen plate 2, preventing damage to the upper end face of the screen plate 2. A one-way locking plate 406, adapted to the locking wheel 403, is elastically abutted against the outer side of the vibrating screen side plate 1 to restrict the unidirectional rotation of the locking wheel 403. The locking wheel 403 includes irregular teeth 411, and a plurality of irregular teeth 411 are arranged sequentially along its circumference on the outer ring side of the locking wheel 403. The one-way locking plate 406 includes limiting teeth 412, and the one-way locking plate 406 is provided with matching limiting teeth 412 on the side near the locking wheel 403. The irregular teeth 411 and the limiting teeth 412 have curved abutment surfaces on one side of the rotation direction in which the main gear 402 drives the wedge block 3 to press, and the abutment surfaces on the other side are flat abutment surfaces. By having curved abutment surfaces on one side, normal rotation is allowed in this direction, so that the mounting shaft 401 can be rotated by rotating the handle 404 in the pressing structure 4, thereby driving the main gear 402 to rotate, so that the wedge block 3 can be gradually pressed onto the screen plate 2; the flat abutment surfaces on the other side can restrict the rotation of the mounting shaft 401, so that the wedge block 3 cannot retract. The one-way locking plate 406 also includes a spring 410. A mounting block 409 is provided on the vibrating screen side plate 1 above the one-way locking plate 406. One end of the spring 410 is mounted on the mounting block 409, and the other end is mounted on the upper surface of the one-way locking plate 406. One end of the one-way locking plate 406 is rotatably mounted on the vibrating screen side plate 1 and elastically abuts against the locking wheel 403 by the spring 410. Additionally, a top rod 408 is included. A top groove 407 is provided on the lower end face of the movable end of the one-way locking plate 406. The top rod 408 is rotatably provided on the vibrating screen side plate 1 located below the top groove 407. The movable end of the top rod 408 can be lifted with the one-way locking plate 406 and then abut against the top groove 407. By setting the top rod 408, when the wedge block 3 needs to be retracted, the one-way locking plate 406 can be lifted, so that the one-way locking plate 406 and the locking wheel 403 are disengaged, and the top rod 408 can lift it up, so that the rotating handle 404 can be rotated to drive the wedge block 3 to retract.

[0028] Example 2

[0029] As shown in Figures 1, 3, and 4, a clamping mechanism for a vibrating screen plate includes a vibrating screen side plate 1, a screen plate 2, and a wedge block 3. The wedge block 3 has a trapezoidal structure. The vibrating screen side plate 1 also includes a mounting platform 101, which is provided on the inner side of the vibrating screen side plate 1. The lower end face of the screen plate 2 abuts against the upper end face of the mounting platform 101. A clamping structure 4 is also included, comprising a mounting shaft 401. The mounting shaft 401 is rotatably mounted on the vibrating screen side plate 1. One end of the mounting shaft 401 extends to the inner side of the vibrating screen side plate 1 and is provided with a main gear 402 located above the wedge block 3. The other end extends to the outer side of the vibrating screen side plate 1 and is provided with a locking wheel 403 and a rotating handle 404. The trapezoidal inclined end of the wedge 3 is provided with a push rack 301 adapted to the main gear 402, and the lower end face opposite to the inclined end is rotatably provided with a track 304. The main gear 402 drives the wedge 3 to slide and press it against the screen plate 2 by pushing the rack 301. In addition, a limiting plate 405 is also included. The limiting plate 405 can be detachably installed on the end face of the main gear 402 away from the vibrating screen side plate 1. The area of ​​the limiting plate 405 covers the side of the wedge 3.

[0030] As shown in Figures 2, 4, and 5, the wedge block 3 also includes a rotating shaft 303. A mounting groove 302 is provided on the lower end face of the wedge block 3 corresponding to the inclined end face. Multiple rotating shafts 303 are sequentially arranged along the length of the mounting groove 302. The track 304 rotates via these multiple rotating shafts 303 to rotatably mount the outer side of the vibrating screen side plate 1, which elastically abuts against a locking wheel 403. A one-way locking plate 406, adapted to restrict the unidirectional rotation of the locking wheel 403, is provided. The locking wheel 403 includes irregular teeth 411, with several irregular teeth 411 sequentially arranged along its circumference on the outer ring side of the locking wheel 403. The one-way locking plate 406 includes limiting teeth 412, with corresponding limiting teeth 412 provided on the side of the one-way locking plate 406 near the locking wheel 403. The non-circular teeth 411 and the limiting teeth 412, driven by the main gear 402 to press the wedge block 3, have curved abutment surfaces on one side and flat abutment surfaces on the other side. The one-way locking plate 406 also includes a spring 410. A mounting block 409 is provided on the vibrating screen side plate 1 above the one-way locking plate 406. One end of the spring 410 is mounted on the mounting block 409, and the other end is mounted on the upper end face of the one-way locking plate 406. One end of the one-way locking plate 406 is rotatably mounted on the vibrating screen side plate 1 and elastically abuts against the locking wheel 403 through the spring 410. It also includes a push rod 408. A top groove 407 is provided on the lower end face of the movable end of the one-way locking plate 406. The push rod 408 is rotatably provided on the vibrating screen side plate 1 below the top groove 407. The movable end of the push rod 408 can be lifted with the one-way locking plate 406 and abut against the top groove 407.

[0031] The working principle of this utility model is as follows: During use, the screen plate 2 is placed on the mounting platform 101, and then the lower end of the trapezoidal inclined surface of the wedge block 3 is slidably inserted under the main gear 402. Then, by rotating the rotating handle 404, the main gear 402 is driven to rotate, thereby causing the wedge block 3 to slide on the screen plate 2 with the main gear 402. As the main gear 402 gradually presses down on the inclined surface of the wedge block 3, the screen plate 2 can be pressed tightly. The one-way locking plate 406 can restrict the reverse rotation of the pressing structure 4. When it is necessary to remove the wedge block 3 by reversing the pressing structure 4, the one-way locking plate 406 can be lifted by the top rod 408, and then the pressing structure 4 can be rotated to remove the wedge block 3.

[0032] In summary, this utility model, by setting a locking wheel 403 and a one-way locking plate 406, can restrict the clamping structure 4 from driving the wedge block 3 to move in one direction, thereby preventing the wedge block 3 from retracting; by setting a limiting plate 405 on the side of the main gear 402, the wedge block 3 can be limited by the limiting plate 405 to prevent the wedge block 3 from detaching from the side; by setting a track 304 at the lower end of the wedge block 3, the friction between the wedge block 3 and the screen plate 2 can be reduced, thereby making the installation of the wedge block 3 easier.

[0033] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A clamping mechanism for a vibrating screen plate, comprising a vibrating screen side plate (1), a screen plate (2), and a wedge (3), wherein the wedge (3) has a trapezoidal structure, characterized in that, It also includes a clamping structure (4), which includes a mounting shaft (401); the mounting shaft (401) is rotatably mounted on the vibrating screen side plate (1), one end of the mounting shaft (401) extends to the inner side of the vibrating screen side plate (1) and is provided with a main gear (402) located above the wedge (3), and the other end extends to the outer side of the vibrating screen side plate (1) and is provided with a locking wheel (403) and a rotating handle (404); the step of the wedge (3) The inclined end is provided with a push rack (301) adapted to the main gear (402), and the lower end face opposite to the inclined end is rotatably provided with a track (304). The main gear (402) drives the wedge (3) to slide and press against the screen plate (2) by pushing the rack (301). The outer side of the vibrating screen side plate (1) is elastically abutted with a one-way locking plate (406) adapted to the locking wheel (403) to limit the one-way rotation of the locking wheel (403).

2. A hold-down mechanism for a vibrating screen deck according to claim 1, characterised in that, The vibrating screen side plate (1) also includes a mounting platform (101). The mounting platform (101) is provided on the inner side of the vibrating screen side plate (1), and the lower end face of the screen plate (2) abuts against the upper end face of the mounting platform (101).

3. The clamping mechanism for a vibrating screen plate according to claim 1, characterized in that, The wedge (3) also includes a rotating shaft (303). The lower end face of the wedge (3) corresponding to the inclined end face is provided with a mounting groove (302). Multiple rotating shafts (303) are arranged sequentially along the length direction of the mounting groove (302). The track (304) is rotatably installed through multiple rotating shafts (303).

4. The clamping mechanism for a vibrating screen plate according to claim 1, characterized in that, It also includes a limiting plate (405), on which the end face of the main gear (402) away from the vibrating screen side plate (1) is detachably mounted with the limiting plate (405), the area of ​​which covers the side of the wedge (3).

5. The hold-down mechanism for a vibrating screen deck defined in claim 1, wherein, The locking wheel (403) includes irregular teeth (411), and a plurality of irregular teeth (411) are arranged sequentially along its circumference on the outer ring side of the locking wheel (403); the one-way locking plate (406) includes limiting teeth (412), and the one-way locking plate (406) is provided with matching limiting teeth (412) on the side near the locking wheel (403); the irregular teeth (411) and the limiting teeth (412) are in a curved contact with the tooth surface on one side of the rotation direction in which the wedge block (3) is pressed by the main gear (402), and the tooth surface on the other side is a planar contact.

6. A hold-down mechanism for a vibrating screen deck according to claim 5, wherein, The one-way locking plate (406) also includes a spring (410). The vibrating screen side plate (1) is provided with a mounting block (409) above the one-way locking plate (406). One end of the spring (410) is mounted on the mounting block (409), and the other end is mounted on the upper surface of the one-way locking plate (406). One end of the one-way locking plate (406) is rotatably mounted on the vibrating screen side plate (1) and elastically abuts against the locking wheel (403) by the spring (410).

7. A clamping mechanism for a vibrating screen plate according to claim 6, characterized in that, It also includes a top rod (408). The lower end face of the movable end of the one-way locking plate (406) is provided with a top groove (407). The vibrating screen side plate (1) is rotatably provided with a top rod (408) located below the top groove (407). The movable end of the top rod (408) can be lifted with the one-way locking plate (406) and then abut against the top groove (407).

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