A new granulator spindle structure

Abstract

The utility model relates to feed mechanical technical field, concretely is a kind of novel granulator main shaft structure, including fixed base, main shaft and cantilever shaft, the first jack plug and the second jack plug around the first jack plug of the first jack plug of the fixed base upper formation is located in middle part The assembly end cooling of main shaft is inserted into the first jack plug from the first end surface of the fixed base, until the assembly end end surface of main shaft is flush with the second end surface of the fixed base, the insertion end cooling of cantilever shaft is inserted into the second jack plug from the second end surface of the fixed base, until the insertion end end surface of cantilever shaft is flush with the first end surface of the fixed base. The technical problem of high production cost, long production cycle of granulator main shaft in prior art is solved.

Description

Technical Field

[0001] This utility model relates to the field of feed machinery technology, specifically a novel pellet mill spindle structure. Background Technology

[0002] A pellet mill is a widely used piece of equipment in the feed industry. It is mainly used to form hard pellets by extruding mixed and conditioned raw materials. The main shaft, as the core component of the pellet mill, has a pressure roller fixed at one end and an overload protection device connected at the other end. It plays a crucial role in the production process of the pellet mill.

[0003] The existing granulator spindle structure has the following problems: 1. The spindle body is integrally formed, which is complex, resulting in high raw material costs and subsequent processing costs, and a long overall processing cycle; 2. The spindle body requires high processing precision. Due to the complexity of the integral forming process, there are many quality control points during the manufacturing process, resulting in a high defect rate. Often, the entire spindle body will be scrapped due to the failure to process individual dimensions properly. Summary of the Invention

[0004] To address the technical problems of high manufacturing cost and long production cycle of pellet mill spindles in the prior art, this application proposes a novel pellet mill spindle structure, which solves the aforementioned technical problems.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] This utility model provides a novel granulator spindle structure, comprising: a fixed base, on which a first insertion hole located in the center and a second insertion hole arranged around the first insertion hole are formed; a spindle, wherein after the assembly end of the spindle is cooled, it is inserted into the first insertion hole from the first end face of the fixed base until the assembly end face of the spindle is flush with the second end face of the fixed base; after the spindle returns to room temperature, it is interference-fitted with the fixed base and welded to the fixed base at the second end face of the fixed base; after the spindle is welded to the fixed base, a first pin hole for guiding the spindle is opened on the side of the fixed base, and a first fixing pin is fitted in the first pin hole; the first fixing pin is used to... The first pin hole passes through the fixed seat and is inserted into the main shaft to form an interference fit; the cantilever shaft, after its insertion end cools, is inserted into the second insertion hole from the second end face of the fixed seat until the insertion end face of the cantilever shaft is flush with the first end face of the fixed seat. After the cantilever shaft returns to room temperature, it is interference-fitted with the fixed seat and welded to the fixed seat on the first end face of the fixed seat. After the cantilever shaft is welded to the fixed seat, a second pin hole is opened on the side of the fixed seat to guide the cantilever shaft. A second fixing pin is fitted in the second pin hole. The second fixing pin passes through the fixed seat and is inserted into the cantilever shaft to form an interference fit.

[0007] Furthermore, the cantilever shaft is cylindrical in shape.

[0008] Furthermore, the section of the cantilever shaft near the mounting end narrows to form a step that abuts against the fixed seat.

[0009] Furthermore, the second insertion hole forms a ring of abutment groove on the second end face of the fixed base to connect to the step of the cantilever shaft.

[0010] Furthermore, there are at least two first retaining pins inserted into the spindle, and they are inserted at different positions on the spindle.

[0011] Furthermore, there are two cantilever shafts, distributed on opposite sides of the main shaft.

[0012] Furthermore, the fixed base, the main shaft, the cantilever shaft, the first fixing pin, and the second fixing pin are all made of metal.

[0013] Based on the above technical solution, the technical effects that this utility model can achieve are as follows:

[0014] The novel granulator spindle structure of this utility model is divided into three sections: a fixed base, a spindle, and a cantilever shaft. This greatly simplifies the structure of each part of the shaft, reduces the processing cycle and manufacturing cost, and simplifies the processing steps by segmenting the process, improving dimensional accuracy and reducing the defect rate. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the novel granulator main shaft of this utility model;

[0016] Figure 2 This is an exploded view of the main shaft structure of the novel granulator of this utility model.

[0017] Wherein: 1-fixed base, 11-first insertion hole, 12-second insertion hole, 121-abutment groove, 13-first end face, 14-second end face; 2-main shaft, 21-first fixing pin; 3-cantilever shaft, 31-second fixing pin. Detailed Implementation

[0018] 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. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0019] like Figure 1-2 As shown, this utility model provides a novel granulator spindle structure, including a fixed base 1, a spindle 2, and a cantilever shaft 3. The fixed base 1 has a first insertion hole 11 located in the center and a second insertion hole 12 arranged around the first insertion hole 11. After the assembly end of the spindle 2 cools, it is inserted into the first insertion hole 11 from the first end face 13 of the fixed base 1 until the assembly end face of the spindle 2 is flush with the second end face 14 of the fixed base 1. After the spindle 2 returns to room temperature, it is interference-fitted with the fixed base 1 and welded to the fixed base 1 at the second end face 14. After the spindle 2 is welded to the fixed base 1, a first pin hole for inserting the spindle 2 is opened on the side of the fixed base 1. A first fixing pin 21 fits in the first pin hole, and the first fixing pin 21 is secured by the first pin... The hole passes through the fixed seat 1 and is inserted into the spindle 2 to form an interference fit, thereby strengthening the connection between the spindle 2 and the fixed seat 1. After the insertion end of the cantilever shaft 3 cools down, it is inserted into the second insertion hole 12 from the second end face 14 of the fixed seat 1 until the insertion end face of the cantilever shaft 3 is flush with the first end face 13 of the fixed seat 1. After the cantilever shaft 3 returns to normal temperature, it is interference-fitted with the fixed seat 1 and welded to the fixed seat 1 at the first end face 13. After the cantilever shaft 3 is welded to the fixed seat 1, a second pin hole for guiding the cantilever shaft 3 is opened on the side of the fixed seat 1. A second fixing pin 31 is fitted in the second pin hole. The second fixing pin 31 passes through the fixed seat 1 and is inserted into the cantilever shaft 3 through the second pin hole to form an interference fit, thereby strengthening the connection between the cantilever shaft 3 and the fixed seat 1.

[0020] This utility model provides a novel granulator spindle structure, which consists of three parts: a cantilever shaft 3, a fixed seat 1, and a spindle 2. The cantilever shaft 3 and the fixed seat 1, as well as the fixed seat 1 and the spindle 2, are all interference fits. The assembly adopts a cold pressing assembly process. After assembly, the first pin hole and the second pin hole are machined, and the corresponding first fixing pin 21 and the second fixing pin 31 are pressed in respectively, which further improves the overall integrity. After the novel granulator spindle structure is divided into multiple parts, each individual part is easier to process. After processing, it can be assembled in a simple way, which can significantly reduce the processing difficulty, shorten the production cycle, reduce the production cost, and improve the yield.

[0021] In one specific embodiment of this utility model, the cantilever shaft 3 is cylindrical in shape. Cylindrical blanks are easier to obtain on the market, thereby reducing costs.

[0022] In one specific embodiment of this utility model, the section of the cantilever shaft 3 near the assembly end is narrowed to form a step that abuts against the fixed seat 1.

[0023] Furthermore, the second insertion hole 12 forms a ring of abutment groove 121 on the second end face 14 of the fixed base 1 to connect to the step of the cantilever shaft 3, making the overall structure more stable.

[0024] Furthermore, there are at least two first fixing pins 21 inserted into the spindle 2, and they are inserted at different positions on the spindle 2. Inserting at least two first fixing pins 21 into the spindle 2 can reduce the length of a single first fixing pin 21 on the one hand, and further improve the overall firmness on the other hand.

[0025] In one specific embodiment of this utility model, there are two cantilever shafts 3, distributed on opposite sides of the main shaft 2, to facilitate subsequent assembly.

[0026] In one specific embodiment of this utility model, the fixed base 1, the main shaft 2, the cantilever shaft 3, the first fixing pin 21 and the second fixing pin 31 are all made of metal, such as iron.

[0027] It should be understood that the specific embodiments described above are only for explaining the present invention and are not intended to limit the present invention. Obvious variations or modifications derived from the spirit of the present invention are still within the protection scope of the present invention.

Claims

1. A novel granulator spindle structure, characterized in that, include: A fixing base (1) having a first insertion hole (11) located in the center and a second insertion hole (12) arranged around the first insertion hole (11); The spindle (2) is inserted into the first insertion hole (11) from the first end face (13) of the fixed seat (1) after the assembly end of the spindle (2) is cooled, until the assembly end face of the spindle (2) is flush with the second end face (14) of the fixed seat (1). After the spindle (2) returns to normal temperature, it is interference-fitted with the fixed seat (1) and welded to the fixed seat (1) on the second end face (14). After the spindle (2) is welded to the fixed seat (1), a first pin hole for inserting the spindle (2) is opened on the side of the fixed seat (1). A first fixing pin (21) is fitted in the first pin hole. The first fixing pin (21) passes through the fixed seat (1) through the first pin hole and is inserted into the spindle (2) to form an interference fit. The cantilever shaft (3) is inserted into the second insertion hole (12) from the second end face (14) of the fixed seat (1) after the insertion end of the cantilever shaft (3) is cooled, until the insertion end face of the cantilever shaft (3) is flush with the first end face (13) of the fixed seat (1). After the cantilever shaft (3) returns to normal temperature, it is interference-fitted with the fixed seat (1) and welded to the fixed seat (1) on the first end face (13). After the cantilever shaft (3) is welded to the fixed seat (1), a second pin hole for guiding the cantilever shaft (3) is opened on the side of the fixed seat (1). A second fixing pin (31) is fitted in the second pin hole. The second fixing pin (31) passes through the fixed seat (1) through the second pin hole and is inserted into the cantilever shaft (3) to form an interference fit.

2. The novel pellet mill main shaft structure according to claim 1, characterized in that, The cantilever shaft (3) is cylindrical in shape.

3. The novel pellet mill main shaft structure according to claim 1, characterized in that, The section of the cantilever shaft (3) near the assembly end narrows to form a step that abuts against the fixed seat (1).

4. The novel pellet mill main shaft structure according to claim 3, characterized in that, The second insertion hole (12) forms a ring of abutment groove (121) on the second end face (14) of the fixed base (1) to connect to the step of the cantilever shaft (3).

5. The novel pellet mill main shaft structure according to claim 1, characterized in that, There are at least two first fixing pins (21) inserted into the main shaft (2), and they are inserted at different positions on the main shaft (2).

6. The novel pellet mill main shaft structure according to claim 1, characterized in that, There are two cantilever shafts (3), which are distributed on opposite sides of the main shaft (2).

7. The novel pellet mill main shaft structure according to claim 1, characterized in that, The fixed base (1), the main shaft (2), the cantilever shaft (3), the first fixing pin (21) and the second fixing pin (31) are all made of metal.

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