Anti-falling impact mill hammerhead mounting structure
Through the interference fit connection between the inverted tapered through holes and the internal threaded pipe, the problem of hammer head falling off is solved, the firm connection between the hammer head and the cutting plate is achieved, and the operation stability and safety of the equipment are improved.
Patent Information
- Application Number
- CN202422045790.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-22
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-08-22
AI Technical Summary
In the prior art, the fastening bolts connected to the hammer head and the circular cutter plate are prone to wear, causing the hammer head to fall off, affecting the stable operation and safety of the mill.
The hammer head is a rectangular structure, with an inverted conical through hole. The connection method is to ensure a stable connection between the hammer head and the cutting wheel through the inverted conical internal threaded pipe and reverse fastening bolts and the circular cutting wheel.
Even if the hammer head and bolts are worn seriously, it can still prevent the hammer head from falling off, improve the stability and safety of equipment operation, and reduce the risk of hammer head breaking.
Smart Images
Figure CN223082883U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a mounting structure for an impact mill hammer head that prevents falling off Background Art
[0002] An impact mill is a very important mill in the field of dry ultrafine pulverization of solid materials. The pulverizing chamber of this mill consists of a circular disc and a toothed stator liner. A plurality of hammer heads are staggered and distributed on the circumferential two sides of the rotor disc. During operation, the rotor disc rotates at a high speed, causing the material to be pulverized to generate centrifugal force. The material is thrown towards the stator liner, and brittle materials are brittlely pulverized. At the same time, there is a small gap between the top of the hammer head on the circular cutter disc and the stator liner. When the rotor disc rotates at a high speed, a strong shearing force is generated between the rotor disc and the stator liner, causing ductile materials to be sheared and pulverized. When crushing materials with higher hardness and strength, the hammer head and its fastening bolts are very easy to wear. Therefore, how to ensure that the hammer head does not fall off when the hammer head and the fastening bolts are worn is an important guarantee for the stable operation of the mill
[0003] In the prior art, the connection between the hammer head and the circular cutter disc mostly uses a counterbore structure for the hammer head to protect the bolts from wear. However, when the hammer head is severely worn, the bolts will also gradually wear. When the hexagon head of the fastening bolt is worn, it is easy to cause the cutter head to fall off and cause accidents Content of the Utility Model
[0004] Aiming at the deficiencies in the background art, the utility model provides a mounting structure for an impact mill hammer head that prevents falling off, which can still ensure stable operation when the hammer head and the bolts are severely worn, and will not cause accidents due to the falling off of the hammer head
[0005] To solve the above technical problems, the utility model adopts the following technical solutions
[0006] A mounting structure for an impact mill hammer head that prevents falling off, the structure includes a circular cutter disc (1) and a hammer head (2), and is characterized in that
[0007] The structure includes a circular cutter disc (1) and a hammer head (2). The hammer head (2) is of a cuboid structure, which is divided into a hammer head end (21) and a hammer head tail (22). Two inverted conical through holes (221) are provided in the hammer head tail (22). The circular cutter disc (1) is provided with a hammer head mounting groove (11). A counterbore (12) is provided on the reverse side of the hammer head mounting groove (11). The mounting groove (11) is evenly divided into 8 - 16 parts in both the front and back directions. The two sides of the hammer head (2) and the mounting groove (11) are in interference fit. The hammer head is fixed on the cutter disc through an inverted conical inner threaded tube (3) and a reverse fastening bolt (4)
[0008] Furthermore, the centers of the two inverted conical through holes (221) in the hammer head tail (22) are on the same straight line and are formed by precision machining or mold processing
[0009] Further, the inverted conical internal thread tube (3) is formed by precision machining, and its outer surface is in interference fit with the inner surface of the inverted conical through hole (221).
[0010] Further, the back counterbore of the hammer head mounting groove of the circular cutter head (1), and the fastening bolts (4) are all recessed into the circular cutter head.
[0011] After the present utility model adopts the above technical solutions, compared with the prior art, it has the following advantages:
[0012] 1. The inverted conical through hole of the hammer head and the inverted conical internal thread tube are in interference fit, and the back of the cutter head has a counterbore. The bolts fix the circular cutter head and the hammer head in the reverse direction. Even if the cutter head is severely worn, the hammer head will not fall off during the rotation of the circular cutter head. At the same time, compared with the form of the cutter head counterbore, the fastening force is stronger, which greatly increases the stability and safety of the equipment operation with the hammer head.
[0013] 2. This structure is especially suitable for hammer heads made of all cemented carbide materials and industrial ceramic materials, greatly reducing the processing difficulty of the counterbore of the cemented carbide hammer head. At the same time, it increases the contact area between the fastening bolt and the hammer head, reducing the risk of the hammer head bursting due to the small contact area between the fastening bolt and the hammer head and the centrifugal force generated by high-speed rotation, making the equipment operation more stable.
[0014] The following further describes the present utility model in detail with reference to the drawings and embodiments. Description of the Drawings
[0015] The following further describes the present utility model with reference to the accompanying drawings of the embodiments, but it is not a limitation to the present utility model:
[0016] Figure 1 It is a schematic assembly diagram of the hammer head and the circular cutter head in the embodiment of the present utility model
[0017] Figure 2 It is a schematic structural diagram of the hammer head in the embodiment of the present utility model
[0018] Figure 3 It is a schematic diagram of the inverted conical internal thread tube of the present utility model
[0019] Figure 4 It is a schematic diagram of the circular cutter head in the embodiment of the present utility model.
[0020] In the figure, 1 - circular cutter head, 11 - mounting groove, 12 - counterbore, 2 - hammer head, 21 - hammer head end, 22 - hammer head tail, 221 - inverted conical through hole, 3 - inverted conical internal thread tube, 4 - fastening bolt Detailed Embodiment
[0021] For a clearer understanding of the technical features, objectives, and effects of the present utility model, the specific embodiments of the present utility model are now described with reference to the drawings.
[0022] The hammer head has a cuboid structure, which is divided into the end part and the tail part of the hammer head. There are two inverted conical through holes in the tail part of the hammer head;
[0023] An inverted conical internal threaded pipe is sleeved in the inverted conical through hole of the hammer head, and the two are in interference fit;
[0024] The circular cutter head is provided with a hammer head installation groove. There is a countersunk hole on the reverse side of the hammer head installation groove. The two sides of the hammer head are in interference fit with the hammer head installation groove. At the same time, the centers of the two inverted conical through holes on the hammer head are concentric with the two circular through holes in the hammer head installation groove of the circular cutter head respectively;
[0025] Conversely, the hammer head is fixed on the cutter head with fastening bolts. The wear of the hammer head and the fastening bolts will not cause the hammer head to fall off. At the same time, the contact area between the bolt and the fastening surface of the hammer head is large, making the cutter head more stable and not easy to crack and break.
[0026] Advantages of the present utility model:
[0027] Through this structural connection method, the risk of accidents caused by the hammer head falling off due to the wear of the hammer head and the bolts is greatly reduced. At the same time, the contact area between the bolt and the fastening surface of the cutter head is increased, reducing the risk of the cutter head cracking and breaking, making the equipment operate more stably and safely.
[0028] The above is an example of the best implementation mode of the present utility model. The parts not described in detail are all common knowledge of those of ordinary skill in the art. The protection scope of the present utility model is subject to the content of the claims. Any equivalent transformation based on the technical inspiration of the present utility model is also within the protection scope of the present utility model.
Claims
1. An anti - shedding impact mill hammer head installation structure, which structure includes a circular cutter head (1) and a hammer head (2), and is characterized in that: This structure includes a circular cutter head (1) and a hammer head (2). The hammer head (2) is of a cuboid structure, divided into a hammer head end (21) and a hammer head tail (22). The hammer head tail (22) is provided with two inverted conical through - holes (221). The circular cutter head (1) is provided with an installation groove (11), and a counterbore (12) is provided on the reverse side of the installation groove (11). The installation groove (11) is evenly divided into 8 - 16 parts in both the front and reverse directions. The two sides of the hammer head (2) and the installation groove (11) are in interference fit, and the hammer head is fixed on the cutter head through an inverted conical inner threaded pipe (3) and a reverse fastening bolt (4).
2. The anti-detachment impact mill hammer head mounting structure according to claim 1, characterized in that: For the two inverted conical through - holes (221) at the hammer head tail (22), the centers of the circles are on the same straight line and are formed by precision machining or grinding.
3. The anti-detachment impact mill hammer head mounting structure according to claim 1, characterized in that: The inverted conical inner threaded pipe (3) is formed by precision machining, and its outer surface is in interference fit with the inner surface of the inverted conical through - hole (221).
4. The anti - shedding impact mill hammer head mounting structure according to claim 1, characterized in that: For the counterbore on the back of the hammer head installation groove of the circular cutter head (1), the bolt head is completely sunk into the circular cutter head.