A double-toothed roller crusher anti-metal foreign object overload protection device
By introducing an overload protection device into the toothed roll crusher, and utilizing the cooperation of metal protective columns and protective pins, the overload problem of the spring when encountering metal foreign objects is solved, thus achieving effective protection of the equipment and avoiding damage to the spring.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GONGYI TIANYUAN MASCH CO LTD
- Filing Date
- 2025-07-15
- Publication Date
- 2026-07-03
AI Technical Summary
When a toothed roller crusher encounters a metal block or hard object, the spring undergoes excessive instantaneous deformation, leading to spring damage and making it difficult to effectively protect the moving shaft.
An overload protection device is adopted, including a metal protective block, a protective pin, and a buffer spring. The metal protective block and the protective pin work together to prevent the buffer spring from exceeding its compression stroke. When overloaded, the protection device breaks the protective pin to relieve the force and prevent equipment damage.
It effectively protects equipment components, prevents spring damage, and extends equipment lifespan.
Smart Images
Figure CN224443130U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of toothed roller crusher technology, and in particular to an anti-metal foreign object overload protection device for a double toothed roller crusher. Background Technology
[0002] Toothed roll crusher (also known as double toothed roll crusher) is a mechanical equipment used for crushing medium and low hardness brittle materials. It is mainly used in coal, mining, metallurgy, sand and gravel yards and coal preparation plants.
[0003] When the movable shaft of a toothed roller crusher is in use, it will undergo slight displacement to protect the movable crushing roller. It is usually supported by a return spring. However, when it encounters a metal block or a large hard object, the spring will deform significantly in an instant, even exceeding the spring's unloading stroke. This not only damages the spring but also makes it difficult to effectively protect the movable shaft.
[0004] To address the aforementioned issues, an overload protection device for metal foreign objects in a double-toothed roller crusher is proposed. Utility Model Content
[0005] The main purpose of this invention is to provide an anti-metal foreign object overload protection device for a double toothed roller crusher, which solves the problems mentioned in the background art.
[0006] The objective of this utility model can be achieved by adopting the following technical solution:
[0007] A double-toothed roller crusher anti-metal foreign object overload protection device includes a crusher body, a cylinder seat integrally formed on the base of the crusher body, a positioning cylinder fixed on one side wall of the inner cavity of the cylinder seat, and overload protection mechanisms provided on the upper and lower sides of the positioning cylinder.
[0008] The overload protection mechanism includes metal protective columns that are symmetrically fixed to the other two side walls of the cylinder seat cavity. A metal protective block is sleeved on the upper limit of the metal protective column. The metal protective column and the metal protective block are provided with pin holes of the same size and connected to each other. A protective pin is limited and passes through the pin hole. A mounting plate is fixed on the output end of the positioning cylinder. The mounting plate is in movable contact with the outer side wall of the metal protective block.
[0009] Furthermore, the metal protective pillar extends 1 / 2 of the distance into the metal protective block.
[0010] Furthermore, the protective pin is made of round steel, one end of the protective pin is formed with a limiting lug, and the other end is movably connected with a buckle.
[0011] Furthermore, a spring plate is fixedly connected to the side of the mounting plate opposite the metal protective block, and a buffer spring is sleeved on the spring plate.
[0012] Furthermore, the end of the buffer spring away from the spring plate is provided with a power unit that is fitted and mounted on the machine base.
[0013] The beneficial technical effects of this utility model are as follows:
[0014] This invention installs a metal protective block with a metal protective column and a protective pin between the cylinder seat and the spring plate. When the toothed roller encounters a metal foreign object, causing a large displacement of the moving shaft and the buffer spring, the metal protective block is first squeezed to slide along the outer wall of the metal protective column, breaking the protective pin to achieve the purpose of unloading force. This provides greater protection for the buffer spring and avoids exceeding the compression stroke of the buffer spring, which could cause damage to the equipment parts. Attached Figure Description
[0015] Figure 1 This is a front view schematic diagram of a preferred embodiment of an anti-metal foreign object overload protection device for a double-toothed roller crusher according to the present invention;
[0016] Figure 2 This is a schematic diagram showing the positional relationship between the overload protection mechanism and the crusher body in a preferred embodiment of a double-toothed roller crusher anti-metal foreign object overload protection device according to the present invention;
[0017] Figure 3 This is a schematic diagram of the structure after the metal protection block and the metal protection column are separated in a preferred embodiment of a double-toothed roller crusher anti-metal foreign object overload protection device according to the present invention;
[0018] Figure 4 This is a top cross-sectional view of the connection relationship between the overload protection mechanism and the spring plate in a preferred embodiment of an anti-metal foreign object overload protection device for a double-toothed roller crusher according to the present invention.
[0019] The annotations in the attached figures are explained as follows:
[0020] 1. Crusher body; 2. Power unit; 3. Buffer spring; 4. Overload protection mechanism; 401. Metal protective block; 402. Mounting plate; 403. Pin hole; 404. Metal protective column; 405. Protective pin; 405a. Buckle; 5. Positioning cylinder; 6. Spring plate; 7. Cylinder seat. Detailed Implementation
[0021] To enable those skilled in the art to understand the technical solution of this utility model more clearly, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings, but the implementation of this utility model is not limited thereto.
[0022] like Figures 1-4As shown, this embodiment provides an anti-metal foreign object overload protection device for a double-toothed roller crusher, including a crusher body 1. A cylinder seat 7 is integrally formed on the base of the crusher body 1. A positioning cylinder 5 is fixed on one side wall of the inner cavity of the cylinder seat 7. Overload protection mechanisms 4 are provided on the upper and lower sides of the positioning cylinder 5. The overload protection mechanism 4 includes metal protective columns 404 symmetrically fixedly installed on the other two side walls of the inner cavity of the cylinder seat 7. A metal protective block 401 is sleeved on the upper limit of the metal protective column 404. The metal protective column 404 and the metal protective block 401 are provided with pin holes 403 of the same size and connected to each other. A protective pin 405 is limited and penetrated in the pin hole 403. An installation plate 402 is fixed on the output end of the positioning cylinder 5. The installation plate 402 is in movable contact with the outer side wall of the metal protective block 401.
[0023] In the above structure, the metal protective column 404 is detachably installed on the cylinder seat 7 by bolts, which facilitates disassembly and replacement after the overload protection device is triggered.
[0024] The metal protective post 404 enters the metal protective block 401 by 1 / 2 of its length, at which point the pin hole 403 is located at 1 / 4 of its length inside the metal protective block 401.
[0025] The protective pin 405 is made of round steel. One end of the protective pin 405 is formed with a limiting lug, and the other end is movably inserted with a buckle 405a. The lug and buckle 405a are designed to prevent the protective pin 405 from being dislodged from the metal protective block 401 due to vibration during operation of the toothed roller crusher.
[0026] A spring plate 6 is fixedly connected to the side of the mounting plate 402 opposite to the metal protective block 401. A buffer spring 3 is sleeved on the spring plate 6. A power unit 2 that is mounted on the base is provided at the end of the buffer spring 3 away from the spring plate 6.
[0027] In the above structure, a movable shaft is installed on the power unit 2. The movable shaft is connected to the buffer spring 3 to buffer and protect the movable roller in the crushing tooth roller. The impact of the movable shaft on the buffer spring 3 within the safe range is relieved by the elastic deformation of the buffer spring 3 itself. When the impact is too large, the buffer spring 3 applies a backward thrust to the overload protection mechanism 4, causing the metal protection block 401 to displace and break the protection pin 405, thereby achieving a further relief and protection effect.
[0028] The above are merely further embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope disclosed by this utility model, based on the technical solution and concept of this utility model, shall fall within the protection scope of this utility model.
[0029] All standard parts used in this application can be purchased from the market, and can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. The control method is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art and is common knowledge in the field. Since this application is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail in this application.
Claims
1. A double-toothed roller crusher overload protection device against metal foreign objects, characterized in that: The crusher body (1) includes a cylinder seat (7) integrally formed on the base of the crusher body (1), a positioning cylinder (5) is fixed on one side wall of the inner cavity of the cylinder seat (7), and an overload protection mechanism (4) is provided on the upper and lower sides of the positioning cylinder (5). The overload protection mechanism (4) includes metal protective columns (404) that are symmetrically fixedly installed on the other two side walls of the inner cavity of the cylinder seat (7). A metal protective block (401) is sleeved on the upper limit of the metal protective column (404). The metal protective column (404) and the metal protective block (401) are provided with pin holes (403) of the same size and connected to each other. A protective pin (405) is limited and penetrated in the pin hole (403). A mounting plate (402) is fixedly installed on the output end of the positioning cylinder (5). The mounting plate (402) is in movable contact with the outer side wall of the metal protective block (401).
2. A metal foreign object overload protection device for a double-toothed roll crusher according to claim 1, characterized in that: The metal protective pillar (404) extends 1 / 2 of the distance into the metal protective block (401).
3. A metal foreign object overload protection device for a double toothed roll crusher as claimed in claim 2, wherein: The protective pin (405) is made of round steel. One end of the protective pin (405) is formed with a limiting lug, and the other end is movably connected with a buckle (405a).
4. The anti-metal foreign object overload protection device for a double-toothed roller crusher according to claim 3, characterized in that: A spring plate (6) is fixedly connected to the side of the mounting plate (402) facing the metal protective block (401), and a buffer spring (3) is sleeved on the spring plate (6).
5. A metal foreign object overload protection device for a double toothed roll crusher as claimed in claim 4, wherein: The buffer spring (3) has a power unit (2) mounted on the base at the end away from the spring plate (6).