Screen quick-release structure of crusher

Abstract

The utility model discloses a crusher screen quick release structure which comprises a shell, a pair of screens arranged in the shell and a screen frame arranged on the outer sides of the screens and used for pressing the screens, the lower end of the screen frame is hinged to the bottom of the shell, and a lock catch is arranged on the upper edge of the screen frame. A shifting fork capable of hooking the lock catch through swinging is further arranged in the shell, and a driving mechanism for driving the shifting fork to swing is arranged outside the shell. The shifting fork is driven by the driving mechanism to swing, so that the shifting fork hooks the screen lock catch to form a self-locking structure, the screen frame is fixed, and the screen is compressed.

Description

Technical Field

[0001] This utility model relates to the field of crushers, specifically to a quick-release structure for a crusher screen. Background Technology

[0002] A pulverizer is a machine that crushes large solid raw materials to the required size. A screen is installed inside the pulverizer's casing to further crush raw materials that haven't reached the required size, while the pulverized material passes through the screen and is discharged. The screen is mounted inside the casing via a screen frame, currently secured either by a ratchet and chain tensioning or by a spring seat pressing a handle.

[0003] like Figure 9 The method uses a ratchet to tighten the chain for fixing. After the screen is in place, multiple chains are interlocked, and then a special tool is used to rotate the eccentric winch to fix the screen frame. However, this fixing method is relatively troublesome to adjust or disassemble, and the chains are prone to breakage after long-term use.

[0004] Using a spring seat to press the handle for fixation results in significant spring fatigue, requiring frequent replacement. Furthermore, if the fatigued spring is not replaced promptly, there is a risk of it popping out during operation of the crusher. Utility Model Content

[0005] Based on this, and in response to the aforementioned technical problems, this utility model provides a quick-release structure for a crusher screen.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] A quick-release structure for a crusher screen includes a housing, a pair of screens disposed inside the housing, and a screen frame with an outer side for pressing the screens. The lower end of the screen frame is hinged to the bottom of the housing. The upper edge of the screen frame has a latch. Inside the housing, there is also a lever fork that can hook the latch by swinging. Outside the housing, there is a drive mechanism for driving the lever fork to swing.

[0008] Using the above technical solution, the lower end of the screen frame is hinged to the bottom of the shell, the upper end of the screen frame is provided with a lock, and a fork is provided inside the shell. The fork is driven by a drive mechanism to swing, so that the fork hooks the screen lock to form a self-locking structure, thereby fixing the screen frame and achieving screen clamping.

[0009] In a specific embodiment of this utility model: a transmission shaft extending along the length of the screen frame is provided on the outer side of the upper part of the housing, the shift fork is connected to the transmission shaft, and one end of the transmission shaft extends out of the housing and is connected to the drive mechanism.

[0010] In a specific embodiment of this utility model: the driving mechanism includes a cylinder and a rocker arm, one end of the rocker arm is connected to a transmission shaft and the other end is connected to the cylinder, and the cylinder is connected to a control switch.

[0011] In a specific embodiment of this utility model: the lower end of the shift fork has a through hole, a bolt is installed in the through hole, the end of the bolt passes through the through hole and abuts against the lock, and a nut is also fitted on the bolt, which is fixed together with the shift fork. By using a structure where the bolt end passes through the through hole and abuts against the lock, the extension length of the bolt end can be controlled by tightening the bolt, thus flexibly adapting to the installation requirements of screens with different thicknesses within the range of 0.5-5.0mm.

[0012] In a specific embodiment of this utility model: the screen frame has an arc-shaped structure and is divided into an upper screen support and a lower screen support. The upper screen support and the lower screen support are hinged together by a long shaft.

[0013] In this specific embodiment of the utility model: a handle base is fixed to the top of the screen frame, and a handle is mounted on the handle base via a rotating shaft. A torsion spring is sleeved on the rotating shaft, with one end of the torsion spring hooking the handle and the other end hooking the handle base. A hook that cooperates with the handle is also provided inside the housing. The handle consists of a handle portion and a hook head connected to the hook. With this structure, during screen replacement, the fork is driven to swing outward to release the lock on the screen frame, causing the screen frame to loosen. By hooking the handle onto the hook, the risk of the screen frame suddenly tipping outward due to gravity, thus preventing damage to the equipment or injury to personnel, can be prevented. The operator can hold the screen frame with one hand and press down on the handle with the other hand to separate the handle from the hook, releasing the screen frame, thus safely and smoothly completing the screen replacement operation.

[0014] In summary, the control switch controls the starter cylinder to drive the fork to swing. When the fork hooks onto the screen lock, a self-locking structure is formed, ensuring reliable fixation of the screen frame. When replacing the screen, the cylinder drives the fork to swing in the opposite direction to release the lock on the screen frame, causing it to loosen. The handle hooks onto the hooks, providing temporary fixation and effectively preventing the screen frame from suddenly tipping over due to gravity. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings.

[0016] Figure 1 This is a schematic diagram of a quick-release structure for a crusher screen according to the present invention;

[0017] Figure 2 This is the front view of this utility model;

[0018] Figure 3 yes Figure 1 Enlarged view of point A in the middle;

[0019] Figure 4 yes Figure 1 Enlarged view of point B in the middle;

[0020] Figure 5 yes Figure 2 Sectional view at CC;

[0021] Figure 6 yes Figure 5 Enlarged view at point D;

[0022] Figure 7 yes Figure 5 Enlarged view at point E in the middle;

[0023] Figure 8 This is a schematic diagram of the structure of the screen frame of this utility model;

[0024] Figure 9 This illustrates the use of ratchet tensioning chains to secure screen frames in the prior art. Detailed Implementation

[0025] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, this utility model is a quick-release structure for a crusher screen, including a housing 10, a pair of screens disposed inside the housing 10, and a screen frame 12 with an outer side for pressing the screens. The two screen frames 12 are symmetrically arranged. The lower end of each screen frame 12 is hinged to the bottom of the housing 10. The upper edge of each screen frame 12 has a U-shaped latch 13, and a fork 14 that can hook the latch 13 by swinging is also provided inside the housing 10. A drive mechanism 15 is provided outside the housing 10 to drive the fork 14 to swing. In this way, the drive mechanism 15 drives the fork 14 to swing, so that the fork 14 hooks the latch 13 to form a self-locking structure, thereby fixing the screen frame.

[0027] like Figure 5 , Figure 6 and Figure 7As shown, the housing 10 is a hollow structure, and a base (not shown in the figure) is fixedly connected to the lower end of the housing 10 to support the housing. A feed inlet 101 is provided at the top of the housing 10. A pair of pressure plates 102 are symmetrically arranged on both sides below the feed inlet 101 inside the housing 10. The pressure plates 102 are inclined. A storage trough 103 is provided at the bottom inside the housing 10. Two screen frames are symmetrically arranged on both sides of the storage trough. When a screen is inserted into the housing and positioned inside the corresponding screen frame, the screen is pressed tightly by the screen frame. The lower edge of the pressure plate 102 presses against the upper folded edge 111 of the corresponding screen 11, and the lower folded edge 112 of the screen 11 is engaged with the edge of the opening of the storage trough 103.

[0028] In this embodiment, a drive shaft 20 extending along the length of the screen frame is provided on the outer side of the upper part of the screen frame 12 inside the housing 10. The shift fork 14 is connected to the drive shaft 20. One end of the drive shaft 20 extends out of the housing 10 and is connected to the drive mechanism 15.

[0029] like Figure 1 As shown, in this embodiment, the drive mechanism 15 includes a cylinder and a rocker arm 152. One end of the rocker arm 152 is connected to the drive shaft 20, and the other end is connected to the cylinder. The cylinder is connected to a control switch.

[0030] like Figure 3 As shown, in this embodiment, the lower end of the shift fork 14 has a through hole. A bolt 141 is provided in the through hole. The end of the bolt 141 passes through the through hole and abuts against the inner wall of the latch 13. A nut 142 is also fitted onto the bolt 141, and the nut 142 is fixed together with the shift fork 14. By adopting the structure of the bolt end passing through the through hole and abutting against the latch, the extension length of the bolt end can be controlled by turning the bolt, thereby flexibly adapting to the installation requirements of screens with different thicknesses within the range of 0.5-5.0mm.

[0031] like Figure 8 As shown, in this embodiment, the screen frame 12 has an arc-shaped structure and is divided into an upper screen support 121 and a lower screen support 122. The upper screen support 121 and the lower screen support 122 are connected together by a long shaft 123.

[0032] like Figure 4As shown, in this embodiment, a handle base 30 is fixed to the top of the screen frame 12, and a handle 32 is mounted on the handle base 30 via a rotating shaft 31. A torsion spring 33 is fitted onto the rotating shaft 31. One end of the torsion spring 33 hooks the handle 32, and the other end hooks the handle base 30. A hook 34 that cooperates with the handle is also provided on the pressure plate. The handle 32 consists of a handle portion 321 and a hook head 322 connected to the hook 34. During the screen replacement process, when the fork is driven to swing outward to release the lock on the screen frame, the handle hooking the hook can prevent the screen frame from suddenly flipping outward due to gravity, thus preventing damage to the equipment or injury to personnel. The operator can hold the screen frame with one hand and press down on the handle portion of the handle with the other hand to separate the hook head from the hook, releasing the screen frame, so as to safely and smoothly complete the screen replacement operation.

[0033] The above describes a quick-release structure for a crusher screen according to this utility model. When the screen needs to be replaced, firstly, the cylinder is activated by the control switch. The piston rod of the cylinder pushes the swing arm 152 to swing, driving the transmission shaft 20 to rotate, causing the fork 14 to swing outward and release the lock 13. Then, the operator holds the screen frame 12 steady with one hand and presses down on the handle 321 of the handle 32 with the other hand to separate the hook 322 from the hook 34, slowly flipping the screen frame 12 outward and pulling out the screen. Afterward, according to the thickness of the screen to be replaced, rotate each bolt so that the length of the bolt end protruding meets the screen installation requirements. Insert the new screen into the inside of the screen frame, flip the screen frame 12 inward, and at the same time press the handle 321 to connect the hook 322 with the hook. Then, the cylinder is controlled by the control switch, and the cylinder drives the transmission shaft 20 to rotate, causing the fork 14 to swing inward and hook the lock 13 to form a self-locking structure, fixing the screen frame and completing the screen replacement and tightening.

[0034] The above description provides a detailed account of one embodiment of the present invention. However, this description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A quick-release structure of a shredder screen, comprising a housing, a pair of screens provided in the housing, and a screen frame provided with a screen outside for pressing the screen, the lower end of the screen frame being hinged to the bottom of the housing, characterized in that, The upper edge of the screen frame is provided with a lock catch, and a shifting fork capable of hooking the lock catch by swinging is arranged in the shell.

2. The quick release structure of a shredder screen according to claim 1, wherein The outer side of the upper part of the screen frame in the shell is provided with a transmission shaft extending along the length direction of the screen frame, the shifting fork is connected with the transmission shaft, and one end of the transmission shaft extends out of the shell and is connected with the driving mechanism.

3. The quick release structure of a shredder screen according to claim 2, wherein The driving mechanism comprises a cylinder and a swinging rod, one end of the swinging rod is connected with the transmission shaft, the other end is connected with the cylinder, and the cylinder is connected with a control switch.

4. The quick release structure of a shredder screen according to claim 1, wherein The lower end of the shifting fork is provided with a through hole, a bolt is arranged in the through hole, the end of the bolt passes through the through hole and abuts against the lock catch, and a nut is sleeved on the bolt, the nut being fixed with the shifting fork.

5. The quick release structure of a shredder screen according to claim 1, wherein The screen frame is in an arc structure and is divided into an upper screen frame support and a lower screen frame support, the upper screen frame support and the lower screen frame support are hingedly connected through a long shaft.

6. The quick release structure of a shredder screen according to claim 1, wherein A handle seat is fixed to the top of the screen frame, a handle is installed on the handle seat through a rotating shaft, a torsion spring is sleeved on the rotating shaft, one end of the torsion spring hooks the handle and the other end hooks the handle seat, a hook is arranged in the shell and cooperates with the handle, and the handle is divided into a handle part and a hook head connected with the hook.

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