A shredder main shaft

Abstract

The present invention belongs to the technical field of shredders, and particularly refers to a shredder main shaft. It includes a main shaft body, and the main shaft body is sleeved with a plurality of blade discs along its axial direction. The blade discs and the main shaft body rotate synchronously in the circumferential direction. An air storage passage is provided between the inner wall surface of the blade disc and the outer wall surface of the main shaft body. An air intake passage connected to the air storage passage is provided on the main shaft body, and the air intake end of the air intake passage is used to communicate with external compressed air. In the production process in which the main shaft body drives the blade discs to rotate, the air intake end of the air intake passage is connected with external compressed air, so that external compressed air is inflated into the air intake passage and the air storage passage, and the compressed air forms a positive pressure environment on the mounting surface between the blade disc and the main shaft body, effectively preventing dust or debris from entering the mounting surface, thereby facilitating the removal of the blade disc from the main shaft body without getting stuck.

Description

Technical field:

[0001] The invention belongs to the technical field of shredders, in particular to a main shaft of a shredder. Background technology:

[0002] A shredder is a machine used to shred plastic or other materials. It includes a shredder main shaft, on which are mounted a plurality of cutters. The rotation of the main shaft drives the rotation of the cutters, so that the rapidly rotating cutters cut the plastic or other materials to achieve the purpose of shredding the materials.

[0003] Among them, the assembly accuracy requirements between the spindle and the tool are relatively high. In actual applications, tearing plastic or other materials will generate a lot of dust and impurities, and these dust and impurities can easily enter the gap between the spindle and the tool, causing the tool to be stuck by dust and impurities, making it difficult to remove from the spindle. The longer the time, the more difficult it is to remove. During the forced disassembly process, since the hardness of the blade is much higher than that of the spindle, the mounting surface of the spindle and the blade will be unpredictably damaged, and even the spindle components will be scrapped. Summary of the invention:

[0004] The object of the present invention is to provide a shredder main shaft, which can effectively prevent dust or impurities from entering the mounting surface between a blade disc and a main shaft body, and facilitates the removal of the blade disc from the main shaft body.

[0005] The present invention is achieved in that:

[0006] A shredder main shaft comprises a main shaft body, wherein the main shaft body is sleeved with a plurality of blade discs along its axial direction, the blade discs and the main shaft body rotate synchronously in the circumferential direction, an air storage passage is arranged between the inner wall surface of the blade disc and the outer wall surface of the main shaft body, an air intake passage connected with the air storage passage is opened on the main shaft body, and the air intake end of the air intake passage is used to communicate with external compressed air.

[0007] In the above-mentioned shredder main shaft, the main shaft body is sleeved with a plurality of spacers along its axial direction, and the spacers are spaced apart from the blade discs, and the air storage passage is located between the inner wall surfaces of the spacers and the blade discs and the outer wall surface of the main shaft body.

[0008] In the above-mentioned shredder main shaft, the middle part of the main shaft body includes, from left to right, a large diameter part, a mounting part and a small diameter part, whose outer diameters gradually decrease one by one, and positioning steps are formed between the large diameter part and the mounting part, and between the mounting part and the small diameter part. The spacer sleeve and the blade disc are arranged on the mounting part, and the spacer sleeve or blade disc located on the far left abuts against the corresponding positioning step, and the spacer sleeve or blade disc located on the far right abuts against the fastening component fixed on the small diameter part.

[0009] In the above-mentioned shredder main shaft, the fastening assembly includes a blade locking sleeve mounted on the small diameter portion, and a locking pressure plate abutting against the corresponding spacer sleeve or blade disc, the blade locking sleeve passes through and is threaded with an adjusting bolt with the end abutting against the locking pressure plate, an annular groove is provided on the small diameter portion located on the right side of the blade locking sleeve, and a locking chuck abutting against the blade locking sleeve is mounted on the annular groove.

[0010] In the above-mentioned shredder main shaft, the mounting portion is a prism structure having a plurality of side surfaces, and the inner hole structures of the blade disc and the spacer sleeve correspond to the prism structure of the mounting portion.

[0011] In the above-mentioned shredder main shaft, an air storage passage is provided between each side surface of the mounting portion and the inner wall surface of the spacer sleeve and the blade disc sleeve.

[0012] In the above-mentioned shredder spindle, the air storage duct is an air duct groove opened on the outer wall of the spindle body, the air duct groove is arranged along the axial direction of the spindle body, the air inlet channel includes a central air hole opened on the axis of the spindle body, and the spindle body is provided with an air passage for connecting the central air hole and the air duct groove.

[0013] The outstanding advantages of the present invention compared with the prior art are:

[0014] During the production process of the main shaft body driving the blade disc to rotate, the air intake end of the air intake channel is connected with external compressed air, so that the external compressed air is inflated into the air intake channel and the air storage channel. The compressed air forms a positive pressure environment on the mounting surface between the blade disc and the main shaft body, effectively preventing dust or debris from entering the mounting surface, thereby facilitating the removal of the blade disc from the main shaft body without getting stuck. Description of the drawings:

[0015] Figure 1 It is an overall stereogram of the present invention;

[0016] Figure 2 It is a partial cross-sectional view of the whole of the present invention;

[0017] Figure 3 is an overall cross-sectional view of the present invention;

[0018] Figure 4 It is a three-dimensional diagram of the main shaft body of the present invention.

[0019] In the figure: 1. spindle body; 2. blade disc; 3. air storage duct; 4. spacer; 5. large diameter part; 6. mounting part; 7. small diameter part; 8. blade locking sleeve; 9. locking pressure plate; 10. adjusting bolt; 11. annular groove; 12. locking chuck; 13. air duct groove; 14. center air hole; 15. air passage. Specific implementation method:

[0020] The present invention is further described below with reference to specific embodiments. Figure 1 —4:

[0021] A shredder main shaft includes a main shaft body 1, wherein the main shaft body 1 is sleeved with a plurality of blade discs 2 along its axial direction, the blade discs 2 and the main shaft body 1 rotate synchronously in the circumferential direction, an air storage passage 3 is arranged between the inner wall surface of the blade disc 2 and the outer wall surface of the main shaft body 1, and an air intake passage connected to the air storage passage 3 is opened on the main shaft body 1, and the air intake end of the air intake passage is used to communicate with external compressed air. At the same time, in this embodiment, the main shaft body 1 is sleeved with a plurality of spacers 4 along its axial direction, and the spacers 4 are spaced apart from the blade discs 2, and the air storage passage 3 is located between the spacers 4 and the inner wall surface of the blade disc 2 and the outer wall surface of the main shaft body 1.

[0022] During the production process in which the spindle body 1 drives the blade disc 2 to rotate, the air inlet end of the air inlet channel is connected to the external compressed air, so that the external compressed air is inflated into the air inlet channel and the air storage passage 3. The compressed air forms a positive pressure environment on the installation surface between the blade disc 2 and the spacer sleeve 4 and the spindle body 1, effectively preventing dust or debris from entering the installation surface, thereby facilitating the removal of the blade disc 2 from the spindle body 1 without getting stuck.

[0023] Moreover, in the present embodiment, the specific structure of the blade disc 2 and the spacer sleeve 4 assembled on the main shaft body 1 is as follows: the middle part of the main shaft body 1 includes, from left to right, a large diameter portion 5, a mounting portion 6 and a small diameter portion 7, the outer diameters of which decrease one by one, and positioning steps are formed between the large diameter portion 5 and the mounting portion 6, and between the mounting portion 6 and the small diameter portion 7, and the spacer sleeve 4 and the blade disc 2 are sleeved on the mounting portion 6, and the spacer sleeve 4 or the blade disc 2 located on the far left abuts against the corresponding positioning step, and the spacer sleeve 4 or the blade disc 2 located on the far right abuts against the fastening component fixed on the small diameter portion 7.

[0024] Furthermore, the fastening assembly may be a fixed structure commonly used in the prior art, which includes a positioning sleeve fixedly sleeved on the small diameter portion 7 of the main shaft body 1. In this embodiment, in order to enable the fastening assembly to have an axial adjustment function, so as to facilitate the axial fastening and assembly of the blade discs 2 and the spacer sleeves 4 of different sizes and thicknesses on the main shaft body 1, the fastening assembly includes a blade locking sleeve 8 sleeved on the small diameter portion 7, and a locking pressure plate 9 abutting against the corresponding spacer sleeve 4 or blade disc 2. The blade locking sleeve 8 penetrates and is screwed with an adjusting bolt 10 whose end abuts against the locking pressure plate 9. An annular groove 11 is provided on the small diameter portion 7 on the right side of the blade locking sleeve 8. A locking chuck 12 abutting against the blade locking sleeve 8 is sleeved on the annular groove 11. The spacing between the locking pressure plate 9 and the blade locking sleeve 8 is adjusted by rotating the adjusting bolt 10, so that the locking pressure plate 9 can be tightly abutted against the corresponding spacer sleeve 4 or blade disc 2. The locking chuck 12 serves to limit the blade locking sleeve 8.

[0025] Furthermore, the circumferential fixing structure between the blade disc 2 and the spacer sleeve 4 and the main shaft body 1 is: the mounting portion 6 is a prism structure with a plurality of side surfaces, and the inner hole structure of the blade disc 2 and the spacer sleeve 4 corresponds to the prism structure of the mounting portion 6, that is, with the help of the multiple side structures of the prism, the blade disc 2 and the spacer sleeve 4 mounted on the mounting portion 6 can rotate synchronously with the mounting disc in the circumferential direction.

[0026] In order to ensure that dust and impurities are effectively removed from the gap between the blade disc 2 and the spacer sleeve 4 and the main shaft body 1, an air storage duct 3 is provided between each side surface of the mounting portion 6 and the inner wall surface of the spacer sleeve 4 and the blade disc 2 sleeve.

[0027] At the same time, in this embodiment, the specific configuration structure of the air storage channel 3 is as follows: the air storage channel 3 is an air channel groove 13 provided on the outer wall of the main shaft body 1, the air channel groove 13 is provided along the axial direction of the main shaft body 1, the air inlet channel includes a central air hole 14 provided on the axis of the main shaft body 1, and the main shaft body 1 is provided with an air passage 15 for connecting the central air hole 14 and the air channel groove 13. In actual application, the outer port of the central air hole 14 can be connected to the external compressed air through a pneumatic rotary joint,

[0028] The above embodiment is only one of the preferred embodiments of the present invention, and is not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes made based on the shape, structure, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A shredder main shaft, comprising a main shaft body (1), characterized in that: The main shaft body (1) is sleeved with a plurality of blade discs (2) along its axial direction. The blade discs (2) and the main shaft body (1) rotate synchronously in the circumferential direction. An air storage passage (3) is provided between the inner wall surface of the blade disc (2) and the outer wall surface of the main shaft body (1). The main shaft body (1) is provided with an air intake passage connected to the air storage passage (3). The air intake end of the air intake passage is used to communicate with external compressed air. The main shaft body (1) is sleeved with a plurality of spacers (4) along its axial direction, and the spacers (4) and the blade disc (2) are arranged at intervals, and the air storage passage (3) is located between the inner wall surface of the spacers (4) and the blade disc (2) and the outer wall surface of the main shaft body (1); The middle part of the main shaft body (1) includes, from left to right, a large diameter part (5), a mounting part (6) and a small diameter part (7) whose outer diameters gradually decrease. Positioning steps are formed between the large diameter part (5) and the mounting part (6), and between the mounting part (6) and the small diameter part (7). The spacer (4) and the blade disc (2) are sleeved on the mounting part (6), and the spacer (4) or the blade disc (2) on the far left abuts against the corresponding positioning step, and the spacer (4) or the blade disc (2) on the far right abuts against the fastening component sleeved on the small diameter part (7). The fastening assembly comprises a blade locking sleeve (8) sleeved on the small diameter portion (7), and a locking pressure plate (9) abutting against the corresponding spacer sleeve (4) or the blade disc (2); the blade locking sleeve (8) penetrates and is threadedly connected with an adjusting bolt (10) whose end abuts against the locking pressure plate (9); an annular groove (11) is provided on the small diameter portion (7) on the right side of the blade locking sleeve (8); a locking chuck (12) abutting against the blade locking sleeve (8) is sleeved on the annular groove (11); The mounting portion (6) is a prism structure having a plurality of side surfaces, and the inner hole structures of the blade disc (2) and the spacer sleeve (4) correspond to the prism structure of the mounting portion (6).

2. A shredder main shaft according to claim 1, characterized in that: An air storage passage (3) is provided between each side surface of the mounting portion (6) and the inner wall surface of the spacer sleeve (4) and the blade disc (2) sleeve.

3. A shredder main shaft according to claim 1 or 2, characterized in that: The air storage passage (3) is an air passage groove (13) provided on the outer wall surface of the main shaft body (1), the air passage groove (13) being arranged along the axial direction of the main shaft body (1), the air inlet passage comprising a central air hole (14) provided on the axis of the main shaft body (1), and an air passage (15) for connecting the central air hole (14) and the air passage groove (13) being provided on the main shaft body (1).

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