A crusher cutter shaft structure

Abstract

The utility model discloses a crusher cutter shaft structure, include: main shaft, one end of main shaft is equipped with first bearing cooperation part, a plurality of inserts are welded with interval along the length direction of main shaft and are arranged, the other end of main shaft is equipped with connecting seat, and connecting seat and main shaft are linked through connecting structure between, and the detachable installation of connecting seat has coupling shaft, and the second bearing cooperation part of coaxial with first bearing cooperation part is equipped with on coupling shaft, and the torque transmission mechanism is equipped with between coupling shaft and connecting seat. Above crusher cutter shaft structure when making, first bearing cooperation part is processed in one end of main shaft first, then a plurality of inserts are welded and set up on main shaft, in addition, the connecting seat, the coupling shaft and the torque transmission mechanism are made separately, and the second bearing cooperation part is not influenced by main shaft when manufacturing, and it is easy to process and manufacture, and it is helpful to have higher coaxiality between first bearing cooperation part and second bearing cooperation part, thereby guaranteeing the service life of crusher cutter shaft structure.

Description

Technical Field

[0001] This utility model relates to the field of waste treatment technology, and in particular to a crusher cutter shaft structure. Background Technology

[0002] Twin-shaft coarse crushers are increasingly used in many solid waste treatment fields, such as large-item waste crushing, biomass energy production, and the manufacture of alternative fuels from municipal solid waste. Twin-shaft coarse crushers rely on the shearing and tearing action between the rotating blades on the shaft and the fixed blades on the frame to crush solid waste. They are characterized by large blade box size, high crushing capacity, and high output torque, and are widely used in the first coarse crushing process of materials.

[0003] The crusher cutter shaft includes a main shaft, multiple blades, and spacers. The blades are welded and fixed along the length of the main shaft at intervals. A spacer fitted onto the main shaft is placed between adjacent blades. Numerous weld seams are welded between the blades and the main shaft, between the spacers and the main shaft, and on the spacers themselves. The overall volume and mass of the crusher cutter shaft are very large, making it impossible to machine bearing mating parts at both ends of the welded shaft. Therefore, current processing methods involve pre-fabricating bearing mating parts at both ends of the main shaft, and then welding the blades and spacers onto the main shaft. However, after welding, the cutter shaft inevitably accumulates deformation at various welding points, making it difficult to guarantee the coaxiality between the two bearing mating parts. This significantly increases the probability of uneven rotation during cutter shaft assembly, leading to severe bearing overheating and premature failure. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the purpose of this invention is to propose a crusher cutter shaft structure that is easy to process and manufacture and has high coaxiality.

[0005] A crusher cutter shaft structure according to an embodiment of the present utility model includes: a main shaft, one end of which is provided with a first bearing mating part, a plurality of blades are welded at intervals along the length of the main shaft, the other end of the main shaft is provided with a connecting seat, the connecting seat and the main shaft are connected by a connecting structure, a connecting shaft is detachably mounted on the connecting seat, the connecting shaft is provided with a second bearing mating part coaxial with the first bearing mating part, and a torque transmission mechanism is provided between the connecting shaft and the connecting seat.

[0006] A crusher cutter shaft structure according to an embodiment of the present utility model has at least the following beneficial effects:

[0007] In the manufacturing process of the above crusher cutter shaft structure, the first bearing mating part is first machined at one end of the main shaft, and then multiple blades are welded on the main shaft. In addition, the connecting seat, connecting shaft and torque transmission mechanism are manufactured separately. The second bearing mating part is not affected by the main shaft during manufacturing, which is easy to process and manufacture, and also helps to achieve a high degree of coaxiality between the first bearing mating part and the second bearing mating part, thereby ensuring the service life of the crusher cutter shaft structure.

[0008] In some embodiments of this utility model, the torque transmission mechanism includes a spline shaft and a spline groove that matches the spline shaft, wherein one of the spline shaft and the spline groove is disposed on the connecting seat and the other is disposed on the connecting shaft.

[0009] In some embodiments of this utility model, the spline shaft is formed on the connecting shaft, the spline shaft and the second bearing mating part are arranged at intervals along the axial direction of the connecting shaft, and the connecting shaft, the spline shaft and the second bearing mating part are an integral metal structure.

[0010] In some embodiments of this utility model, the spindle is provided with a first disc portion at one end away from the first bearing mating portion, the connecting seat is a second disc portion that can fit against the side of the first disc portion, the spline groove is provided through the second disc portion, one of the first disc portion and the second disc portion is provided with a circular recessed groove arranged concentrically therewith, and the other is provided with an annular protrusion that contacts the inner peripheral wall of the circular recessed groove.

[0011] In some embodiments of this utility model, the connecting structure is an annular welding strip disposed between the outer peripheral edge of the side surface of the first disk portion and the outer peripheral edge of the side surface of the second disk portion.

[0012] In some embodiments of this utility model, the connecting structure includes a plurality of threaded holes spaced apart around the circumference of the first disk portion, and through holes corresponding to the threaded holes are provided through the outer peripheral edge of the side of the second disk portion. Both the through holes and the threaded holes extend along the axial direction parallel to the main shaft, and each through hole is provided with a bolt connected to the corresponding threaded hole.

[0013] In some embodiments of this utility model, the spline shaft and the spline groove are in the shape of a plum blossom.

[0014] In some embodiments of this utility model, the blade has an open arc sleeve, the inner diameter of which matches the outer diameter of the spindle. An arc strip is mounted on the spindle to close the opening of the arc sleeve. The two ends of the arc strip are spliced ​​to the two ends of the arc sleeve to form two first V-shaped notches. The smaller end of the first V-shaped notch is connected to the outer peripheral wall of the spindle. A first welding part is provided between the two side walls of the blade and the outer peripheral wall of the spindle, and between the two side walls of the arc strip and the outer peripheral wall of the spindle. A second welding part is provided inside the first V-shaped notch.

[0015] In some embodiments of this utility model, the spindle is provided with a spacer between two adjacent blades, and the two ends of the spacer abut against the side walls of the two blades and the side walls of the two arc strips, respectively. The two ends of the spacer are provided with annular inclined surfaces for shielding and avoiding the first welded part.

[0016] In some embodiments of this utility model, the spacer is formed by splicing two semicircular sleeves, and a second V-shaped notch is provided at the splice of the two semicircular sleeves. The smaller end of the second V-shaped notch is connected to the outer peripheral wall of the main shaft, and a third welding part is provided inside the second V-shaped notch.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0019] Figure 1 This is a schematic diagram of one embodiment of the crusher cutter shaft structure of this utility model;

[0020] Figure 2 for Figure 1 A partially enlarged schematic diagram showing the separation of the connecting shaft, connecting seat, and main shaft in the embodiment;

[0021] Figure 3 for Figure 1 A schematic diagram of a layout section of an embodiment;

[0022] Figure 4 A schematic diagram of one embodiment of the blade, arc strip, and spacer;

[0023] Figure 5 for Figure 2 A structural schematic diagram of the connector from another perspective.

[0024] Figure label:

[0025] Main spindle 100; first bearing mating part 110; first disc part 120; circular countersunk groove 121; blade 200; arc sleeve 210; connecting seat 300; second disc part 310; annular protrusion 311; connecting shaft 400; second bearing mating part 410; torque transmission mechanism 500; spline shaft 510; spline groove 520; threaded hole 610; through hole 620; bolt 630; arc strip 700; first V-shaped notch 710; spacer 800; first welded part 810; annular inclined surface 820; second V-shaped notch 830. Detailed Implementation

[0026] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0027] In the description of this utility model, it should be understood that the directional descriptions, such as the terms "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] See Figure 1 and Figure 2This utility model discloses a crusher cutter shaft structure, comprising: a main shaft 100, one end of which is provided with a first bearing mating part 110, a plurality of blades 200 are welded at intervals along the length of the main shaft 100, the other end of which is provided with a connecting seat 300, the connecting seat 300 and the main shaft 100 being connected by a connecting structure, a connecting shaft 400 being detachably mounted on the connecting seat 300, a second bearing mating part 410 coaxial with the first bearing mating part 110 being provided on the connecting shaft 400, and a torque transmission mechanism 500 being provided between the connecting shaft 400 and the connecting seat 300.

[0031] In the manufacturing process of the above-mentioned crusher cutter shaft structure, the first bearing mating part 110 is first machined at one end of the main shaft 100. Then, multiple blades 200 are welded onto the main shaft 100. In addition, the connecting seat 300, the connecting shaft 400, and the torque transmission mechanism 500 are manufactured separately. The second bearing mating part 410 is not affected by the main shaft 100 during manufacturing, which is easy to process and manufacture, and also helps to achieve a high degree of coaxiality between the first bearing mating part 110 and the second bearing mating part 410, thereby ensuring the service life of the crusher cutter shaft structure.

[0032] See Figure 2 and Figure 5 In some embodiments of this utility model, the torque transmission mechanism 500 includes a splined shaft 510 and a spline groove 520 matching the splined shaft 510. One of the splined shaft 510 and the spline groove 520 is disposed on the connecting seat 300, and the other is disposed on the connecting shaft 400. It should be noted that the splined shaft 510 has multiple teeth participating in bearing the load simultaneously. Compared with a single-key connection, the torque can be distributed to multiple teeth, making the stress on each tooth relatively small, thereby greatly improving the load-bearing capacity of the connection and meeting the transmission requirements of larger power and torque.

[0033] Furthermore, the spline shaft 510 and spline groove 520, when used together, can provide better positioning and guidance in the circumferential and axial directions, ensuring good coaxiality between the main shaft 100 and the connecting shaft 400, and improving the smoothness of mechanical transmission.

[0034] In a preferred embodiment, the spline shaft 510 and the spline groove 520 are in a plum blossom shape, which makes it easier to disassemble and install the spline shaft 510 and the spline groove 520, thereby improving maintenance efficiency.

[0035] See Figure 2 and Figure 5In some embodiments of this utility model, the spline shaft 510 is formed on the connecting shaft 400, and correspondingly, the spline groove 520 is provided on the connecting seat 300. The spline shaft 510 and the second bearing mating part 410 are arranged at intervals along the axial direction of the connecting shaft 400. The connecting shaft 400, the spline shaft 510 and the second bearing mating part 410 are an integral metal structure. The connecting shaft 400, the spline shaft 510 and the second bearing mating part 410 are obtained by machining the metal parts to have high mechanical strength. In subsequent processes, they are heat treated and surface treated together for easy manufacturing.

[0036] See Figure 2 and Figure 5 In some embodiments of this utility model, the spindle 100 has a first disc portion 120 at one end away from the first bearing mating portion 110, and the connecting seat 300 is a second disc portion 310 that can fit against the side of the first disc portion 120. The spline groove 520 passes through the second disc portion 310. One of the first disc portion 120 and the second disc portion 310 has a circular recess 121 concentrically arranged therewith, and the other has an annular protrusion 311 that contacts the inner peripheral wall of the circular recess 121. It can be understood that the circular recess 121 and the annular protrusion 311 are used to position the relative positions of the first disc portion 120 and the second disc portion 310, ensuring that the center line of the spline groove 520 is coaxial with the spindle 100, and ultimately ensuring a high degree of coaxiality between the first bearing mating portion 110 and the second bearing mating portion 410.

[0037] In some embodiments of this utility model, the connecting structure is an annular welded strip located between the outer peripheral edge of the side surface of the first disk portion 120 and the outer peripheral edge of the side surface of the second disk portion 310. The annular welded strip secures the side surface of the first disk portion 120 and the side surface of the second disk portion 310 together, resulting in a strong connection and convenient assembly. The connecting seat 300 and the main shaft 100 can be replaced or repaired as a single unit.

[0038] See Figure 1 and Figure 2 In some embodiments of this utility model, the connecting structure includes a plurality of threaded holes 610 spaced apart around the circumference of the first disc portion 120. The outer peripheral edge of the side of the second disc portion 310 is provided with through holes 620 corresponding to the threaded holes 610. Both the through holes 620 and the threaded holes 610 extend axially parallel to the main shaft 100. Each through hole 620 is fitted with a bolt 630 connected to the corresponding threaded hole 610. It is understood that when the spline groove 520 of the connecting seat 300 experiences excessive wear or dimensional abnormalities, the connecting seat 300 can be replaced individually using the above structure.

[0039] See Figure 3 and Figure 4 In some embodiments of this utility model, the blade 200 has an arc sleeve 210 with an opening. The inner diameter of the arc sleeve 210 matches the outer diameter of the spindle 100. An arc strip 700 for closing the opening of the arc sleeve 210 is installed on the spindle 100. The two ends of the arc strip 700 are spliced ​​to the two ends of the arc sleeve 210 to form two first V-shaped notches 710. The smaller end of the first V-shaped notch 710 is connected to the outer peripheral wall of the spindle 100. A first welding part 810 is provided between the two side walls of the blade 200 and the outer peripheral wall of the spindle 100, and between the two side walls of the arc strip 700 and the outer peripheral wall of the spindle 100. A second welding part is provided in the first V-shaped notch 710. Understandably, before welding the fixed blade 200, the arc sleeve 210 is first inserted into one end of the spindle 100, and then the arc strip 700 is aligned with the opening of the arc sleeve 210 and spliced. The first welding part 810 welds and fixes the blade 200 and the arc strip 700 to the spindle 100 respectively. The second welding part not only increases the connection part of the blade 200 and the arc strip 700 on the spindle 100, but also connects the blade 200 and the arc strip 700 together to fill the first V-shaped gap 710, further improving the welding strength.

[0040] See Figure 1 , Figure 3 and Figure 4 In some embodiments of this utility model, a spacer 800 is provided between two adjacent blades 200 on the main shaft 100. The two ends of the spacer 800 abut against the side walls of the two blades 200 and the side walls of the two arcuate strips 700, respectively. The two ends of the spacer 800 are provided with annular inclined surfaces 820 for shielding and avoiding the first welded portion 810. It is understood that the annular inclined surfaces 820 at both ends of the spacer 800 can protect the first welded portion 810, preventing crushed material from directly impacting the first welded portion 810 and causing it to detach. Specifically, to protect the spacer 800 itself from damage, a large number of weld beads are arranged at intervals around the axial direction of the main shaft 100 on the outer peripheral wall of the spacer 800. These weld beads can be re-welded after wear or chipping.

[0041] In some embodiments of this utility model, in order to facilitate the manufacturing of the spacer 800 and the assembly between the spacer 800 and the main shaft 100, the spacer 800 is formed by splicing two semi-circular sleeves. A second V-shaped notch 830 is provided at the splice of the two semi-circular sleeves. The smaller end of the second V-shaped notch 830 is connected to the outer peripheral wall of the main shaft 100. A third welding part is provided inside the second V-shaped notch 830.

[0042] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0043] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A crusher cutter shaft structure, characterized in that, include: A spindle (100) is provided at one end with a first bearing mating part (110). Multiple blades (200) are welded to the spindle (100) at intervals along its length. A connecting seat (300) is provided at the other end of the spindle (100). The connecting seat (300) and the spindle (100) are connected by a connecting structure. A connecting shaft (400) is detachably installed on the connecting seat (300). A second bearing mating part (410) is provided on the connecting shaft (400) and is coaxial with the first bearing mating part (110). A torque transmission mechanism (500) is provided between the connecting shaft (400) and the connecting seat (300).

2. The crusher cutter shaft structure according to claim 1, characterized in that: The torque transmission mechanism (500) includes a spline shaft (510) and a spline groove (520) that matches the spline shaft (510). One of the spline shaft (510) and the spline groove (520) is disposed on the connecting seat (300), and the other is disposed on the connecting shaft (400).

3. The crusher cutter shaft structure according to claim 2, characterized in that: The spline shaft (510) is formed on the connecting shaft (400). The spline shaft (510) and the second bearing mating part (410) are arranged at intervals along the axial direction of the connecting shaft (400). The connecting shaft (400), the spline shaft (510) and the second bearing mating part (410) are an integral metal structure.

4. The crusher cutter shaft structure according to claim 2, characterized in that: The main shaft (100) has a first disc portion (120) at one end away from the first bearing mating portion (110). The connecting seat (300) is a second disc portion (310) that can fit against the side of the first disc portion (120). The spline groove (520) passes through the second disc portion (310). One of the first disc portion (120) and the second disc portion (310) has a circular groove (121) arranged concentrically with it, and the other has an annular protrusion (311) that contacts the inner peripheral wall of the circular groove (121).

5. A crusher cutter shaft structure according to claim 4, characterized in that: The connection structure is an annular welded strip located between the outer peripheral edge of the side of the first disk portion (120) and the outer peripheral edge of the side of the second disk portion (310).

6. The crusher cutter shaft structure according to claim 4, characterized in that: The connection structure includes a plurality of threaded holes (610) spaced apart around the circumference of the first disk portion (120). The outer peripheral edge of the side of the second disk portion (310) is provided with through holes (620) corresponding to the threaded holes (610). Both the through holes (620) and the threaded holes (610) extend along an axial direction parallel to the main shaft (100). Each through hole (620) is provided with a bolt (630) connected to the corresponding threaded hole (610).

7. A crusher cutter shaft structure according to claim 2, characterized in that: The spline shaft (510) and the spline groove (520) are in the shape of a plum blossom.

8. A crusher cutter shaft structure according to claim 1, characterized in that: The blade (200) has an open arc sleeve (210), the inner diameter of which matches the outer diameter of the spindle (100). An arc strip (700) for closing the opening of the arc sleeve (210) is installed on the spindle (100). The two ends of the arc strip (700) are spliced ​​to the two ends of the arc sleeve (210) to form two first V-shaped notches (710). The smaller end of the first V-shaped notch (710) is connected to the outer peripheral wall of the spindle (100). A first welding part (810) is provided between the two side walls of the blade (200) and the outer peripheral wall of the spindle (100), and between the two side walls of the arc strip (700) and the outer peripheral wall of the spindle (100). A second welding part is provided inside the first V-shaped notch (710).

9. A crusher cutter shaft structure according to claim 8, characterized in that: The spindle (100) has a spacer (800) between two adjacent blades (200). The two ends of the spacer (800) abut against the side walls of the two blades (200) and the side walls of the two arc strips (700), respectively. The two ends of the spacer (800) are provided with annular inclined surfaces (820) for blocking and avoiding the first welded part (810).

10. A crusher cutter shaft structure according to claim 9, characterized in that: The spacer (800) is formed by splicing two semicircular sleeves. A second V-shaped notch (830) is provided at the splice of the two semicircular sleeves. The smaller end of the second V-shaped notch (830) is connected to the outer peripheral wall of the main shaft (100). A third welding part is provided inside the second V-shaped notch (830).

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