Double-shaft shredding machine and fixed cutter assembly thereof

Abstract

The stationary knife assembly comprises a stationary knife fixing plate connected to the inner wall of a case plate of the double-shaft shredder, and the top end face and the bottom end face of the stationary knife fixing plate are each provided with a hanging part. Hanging parts are arranged at the upper ends and the lower ends of the fixed cutter bodies respectively, the hanging parts are hung on the hanging parts, and the fixed cutter bodies are constructed to be capable of adjusting the distance between the fixed cutter bodies and a movable cutter spacer bush of the double-shaft shredding machine through movement; the push plate is arranged between the stationary knife fixing plate and the stationary knife body, the push plate is connected to the stationary knife fixing plate through a long screw, and the other end face of the push plate abuts against the stationary knife body. According to the double-shaft shredding machine, when the fixed cutter body is abraded, the fixed cutter body can be pushed to the position close to the movable cutter spacer bush through the pushing plate, so that the matching degree of the fixed cutter body and the movable cutter spacer bush is ensured, and the service life of the fixed cutter body can be prolonged while the shredding effect is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of pulverizing equipment, in particular to a double-shaft shredder and a fixed knife assembly thereof. Background Art

[0002] Double-shaft shredder is a kind of crushing equipment widely used in the industrial field. Its main function is to shear and shred raw materials. It mainly includes two types of cutting tools: a moving knife driven by two rotating shafts to achieve relative motion, and a fixed comb-toothed fixed knife. In the existing double-shaft shredder, the fixed knife is usually fixed. For example, the utility model patent with the publication number CN212069052U and the name "Crusher Automation Control System" discloses a crusher with a comb-toothed metal sheet on the edge of the inner cavity of the crushing chamber, and a pair of roller-type toothed knife groups in the middle. The fixed comb-toothed metal sheet (fixed knife) will cause wear on the side that cooperates with the pair of roller-type toothed knife groups (moving knife) during long-term use. The comb-toothed metal sheet with a larger degree of wear needs to be replaced in time to ensure its shearing effect. However, frequent replacement of the comb-toothed metal sheet will cause its service life to be too short and the replacement cost to be too high. Utility Model Content

[0003] The purpose of the utility model is to provide a double-shaft shredder and a fixed knife assembly thereof, which can solve the technical problems mentioned in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a fixed knife assembly, which is used for a double-axis shredder, comprising: a fixed knife fixing plate connected to the inner wall of the double-axis shredder chassis plate, the top end surface and the bottom end surface of the fixed knife fixing plate are respectively provided with hanging parts; a plurality of movable fixed knife bodies, the upper and lower ends of the fixed knife bodies are respectively provided with hanging parts, the hanging parts are hung on the hanging parts, and the fixed knife body is constructed to be able to adjust the spacing between it and the double-axis shredder motor knife spacer by movement; a pushing plate arranged between the fixed knife fixing plate and the fixed knife body, the pushing plate is connected to the fixed knife fixing plate by a long screw, and the other end surface of the pushing plate abuts against the fixed knife body.

[0005] In one embodiment, the hanging portion includes a sliding end surface and a hanging ear, and the hanging portion includes a connecting portion extending from the upper and lower ends of the fixed knife body to the side close to the fixed knife fixing plate, and a hook fixedly connected to the end of the connecting portion, and the hook is hung on the hanging ear.

[0006] In one embodiment, the length L1 of the sliding end surface is greater than the width L2 of the hook, and the length L3 of the connecting portion is greater than the width L4 of the hook. This arrangement enables the fixed knife body to have space for movement.

[0007] In one embodiment, the push plate is constructed by combining multiple plates, and its total length is consistent with the length of the fixed knife fixing plate. By configuring the push plate as multiple plates, the adjustment thereof will be more flexible, and it can be adjusted individually according to the situation of a certain fixed knife body, which is more targeted.

[0008] On the other hand, the utility model further provides a double-shaft shredder, comprising the fixed knife assembly described in any one of the above schemes.

[0009] In one embodiment, the double-shaft shredder further includes: a feed hopper, a working chamber connected to the outlet end of the feed hopper, the working chamber being enclosed by a box plate; and a shearing knife group, the shearing knife group including two groups of rotatable rollers arranged along the length direction of the working chamber, and a plurality of movable blades and movable knife spacers sleeved on the middle ends of the rollers, the fixed knife body and the movable knife spacers on the corresponding side cooperate.

[0010] In one embodiment, the saw teeth of each movable blade are arranged to be staggered in rotation direction.

[0011] In one embodiment, a material screening element is connected to the discharge end of the working cavity.

[0012] Compared with the prior art, the beneficial effect of the utility model is that the double-shaft shredder provided by the utility model is provided with a push plate and a movable fixed knife body. When the fixed knife body is worn, the push plate can be used to move it to a position close to the moving knife spacer, thereby ensuring the fit between the fixed knife body and the moving knife spacer. While ensuring the shearing and shredding effects, the service life of the fixed knife body can be extended and the replacement frequency can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the overall structure of a double-shaft shredder in an embodiment of the utility model;

[0014] Figure 2 This is a schematic diagram of the structure of the working chamber and the shearing knife group in the embodiment of the utility model;

[0015] Figure 3 for Figure 2 The main view;

[0016] Figure 4 for Figure 3 Cross-sectional view in the BB direction;

[0017] Figure 5 It is a schematic diagram of the cooperation between the fixed knife fixing plate and the fixed knife body in the embodiment of the utility model.

[0018] The meaning of each number in the figure is:

[0019] 1. Feed hopper; 2. Box plate; 21. First box plate; 22. Second box plate; 3. Working chamber; 4. Support frame; 5. Support plate; 6. Roller; 7. Speed ​​reducer motor; 8. Mounting plate; 9. Moving blade; 10. Moving blade spacer; 11. Fixed blade fixing plate; 12. Hanging part; 121. Sliding end surface; 122. Hanging ear; 13. Fixed blade body; 14. Hanging part; 141. Connecting part; 142. Hook; 15. Pushing plate; 16. Long screw. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0022] See also Figure 1 The present embodiment discloses a double-shaft shredder, comprising a feed hopper 1, and an operating cavity 3 connected to the outlet end of the feed hopper 1, wherein the operating cavity 3 is enclosed by a box plate 2, and a shearing knife group is connected through the box plate 2, and a shearing body of the shearing knife group is arranged in the operating cavity 3, and the bottom end of the operating cavity 3 is a discharging end, and the sheared or shredded materials are discharged through the discharging end, and the discharging end is connected to a collection container.

[0023] The feed hopper 1 is constructed in a funnel shape, and the material to be sheared is fed through the feed hopper 1 . The cross section of the feed hopper 1 is rectangular, which is convenient for connecting with the box plate 2 .

[0024] In this embodiment, the double-shaft shredder also includes a support frame 4 for supporting the entire device. A support plate 5 is provided at the top of the support frame 4. The working cavity 3 is seated on the support plate 5. A discharge through hole is provided in the center of the support plate 5. The discharge through hole constitutes the discharge end of the working cavity 3, and the sheared or shredded materials are discharged through the discharge end.

[0025] Specifically, Figure 2As shown, the working chamber 3 is constructed as a rectangular chamber enclosed by four groups of box boards 2. Each box board 2 is connected to a support plate 5. For easy distinction, the two longer groups of box boards 2 are defined as first box boards 21, and the two shorter groups of box boards 2 are defined as second box boards 22.

[0026] The shearing knife group includes two groups of roller shafts 6 that are rotatably connected to the working cavity 3 along the length direction of the working cavity 3, and reduction motors 7 that are respectively connected to the ends of the two groups of roller shafts 6. The two reduction motors 7 respectively control the two groups of roller shafts 6 to perform relative and reverse movements at different speeds. Correspondingly, in the structure of the support frame 4, mounting plates 8 for supporting the reduction motors 7 are respectively provided at both ends of the support plate 5, and the two reduction motors 7 are respectively fixedly connected to the two mounting plates 8. Further, in this embodiment, the two groups of roller shafts 6 are arranged in parallel, and the two ends of the roller shafts 6 are respectively rotatably connected to the second box plate 22 through bearings.

[0027] In this embodiment, the cross section of the middle end of the roller shaft 6 is a polygonal structure, which is convenient for transmitting the rotational torque. Figure 2 As shown, the shearing knife group further includes a plurality of movable blades 9 and movable blade spacers 10 sleeved on the middle end of the roller shaft 6. The movable blades 9 and movable blade spacers 10 are arranged in staggered intervals. In the same roller shaft 6, the saw teeth of each movable blade 9 are arranged in a staggered manner. The movable blades 9 of the two roller shafts 6 are arranged in a staggered manner, that is, the movable blade 9 of one roller shaft 6 corresponds to the movable blade spacer 10 of the other roller shaft 6.

[0028] Combination Figure 4 and Figure 5 The shearing knife group also includes a fixed knife assembly connected to the inner wall of the first box plate 21, and the fixed knife assembly includes a fixed knife fixing plate 11 fixedly connected to the inner wall of the first box plate 21 by screws. In this embodiment, the top end surface and the bottom end surface of the fixed knife fixing plate 11 are respectively provided with a hanging portion 12, and the hanging portion 12 includes a sliding end surface 121 and a hanging ear 122, and the hanging ear 122 is constructed to extend upward or downward (upward on the top end surface and downward on the bottom end surface) along the outer side of the sliding end surface 121. The fixed knife assembly also includes a plurality of fixed knife bodies 13 hanging on the two hanging ears 122, and the fixed knife bodies 13 cooperate with the movable knife spacer 10 on the corresponding side, and are staggered with the movable blade 9 on the corresponding side. In this embodiment, the fixed knife body 13 is constructed to be able to move relative to the sliding end surface 121, and the matching spacing between the fixed knife body 13 and the movable knife spacer 10 can be adjusted by moving.

[0029] Further, the upper and lower ends of the fixed knife body 13 are provided with a hanging portion 14, and the fixed knife body 13 cooperates with the hanging portion 12 through the hanging portion 14. The hanging portion 14 includes a connecting portion 141 extending from the upper and lower ends of the fixed knife body 13 to the side close to the fixed knife fixing plate 11, and a hook 142 fixedly connected to the end of the connecting portion 141, and the hook 142 is hung on the hanging ear 122. It should be noted that in this embodiment, the length L1 of the sliding end surface 121 of the fixed knife fixing plate 11 should be greater than the width L2 of the hook 142 of the fixed knife body 13, and the length L3 of the connecting portion 141 of the fixed knife body 13 should be greater than the width L4 of the hanging ear 122 of the fixed knife fixing plate 11, so that the fixed knife body 13 has a movable space.

[0030] Furthermore, the fixed knife assembly further includes a push plate 15 disposed between the fixed knife fixing plate 11 and the fixed knife body 13, and the push plate 15 is fixedly connected to the fixed knife fixing plate 11 by a plurality of long screws 16 and a nut combination. The other end surface of the push plate 15 abuts against the fixed knife body 13, and when the working surface of the fixed knife body 13 is worn, the position of the push plate 15 can be adjusted by loosening the long screws 16 and the nut combination, so that the push plate 15 pushes the fixed knife body 13 to move to a position close to the movable knife spacer 10, so that the worn fixed knife body 13 can continue to play its role, prolong its service life, and reduce the replacement frequency.

[0031] In this embodiment, the push plate 15 is constructed to be composed of a plurality of plates, and its total length is consistent with the length of the fixed knife fixing plate 11. By setting the push plate 15 as a plurality of plates, the adjustment thereof will be more flexible, and it can be adjusted individually according to the wear of a certain fixed knife body 13, which is more targeted. In other embodiments not shown, the push plate 15 can also be set as a whole plate with the same length as the fixed knife fixing plate 11.

[0032] Preferably, in this embodiment, the discharge end of the working cavity 3 is also connected to a material screening element, such as a screen plate or a screen, and the screened material is collected into a collection container.

[0033] The double-shaft shredder provided in this embodiment improves the structure of the fixed knife assembly on the basis of the existing technology. By providing a push plate 15 and a movable fixed knife body 13, when the fixed knife body 13 is worn, it can be pushed to a position close to the movable knife spacer 10 by the push plate 15, thereby ensuring the fit between the fixed knife body 13 and the movable knife spacer 10. While ensuring the shearing and shredding effects, the service life of the fixed knife body 13 can be extended and the replacement frequency can be reduced.

[0034] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A fixed knife assembly, the fixed knife assembly is used for a double-shaft shredder, characterized in that: include: A fixed knife fixing plate (11) connected to the inner wall of the double-shaft shredder chassis plate (2), wherein the top end surface and the bottom end surface of the fixed knife fixing plate (11) are respectively provided with hanging parts (12); A plurality of movable fixed knife bodies (13), wherein the upper and lower ends of the fixed knife bodies (13) are respectively provided with hanging parts (14), the hanging parts (14) are hung on the hanging parts (12), and the fixed knife bodies (13) are constructed so as to be able to adjust the distance between them and the double-axis shredder motor knife spacer (10) by moving; A push plate (15) is arranged between the fixed knife fixing plate (11) and the fixed knife body (13); the push plate (15) is connected to the fixed knife fixing plate (11) via a long screw (16); and the other end surface of the push plate (15) abuts against the fixed knife body (13).

2. The fixed knife assembly according to claim 1, characterized in that: The hanging portion (12) comprises a sliding end surface (121) and a hanging ear (122), and the hanging portion (14) comprises a connecting portion (141) extending from the upper and lower ends of the fixed knife body (13) to a side close to the fixed knife fixing plate (11), and a hook (142) connected to the end of the connecting portion (141), and the hook (142) is hung on the hanging ear (122).

3. The fixed knife assembly according to claim 2, characterized in that: The length L1 of the sliding end surface (121) is greater than the width L2 of the hook (142), and the length L3 of the connecting portion (141) is greater than the width L4 of the hook ear (122).

4. The fixed knife assembly according to claim 1, characterized in that: The pushing plate (15) is constructed by combining a plurality of plates, and its total length is consistent with the length of the fixed knife fixing plate (11).

5. A double-shaft shredder, characterized in that: The invention comprises the fixed knife assembly according to any one of claims 1 to 4.

6. The double-shaft shredder according to claim 5, characterized in that: Also includes: Feed hopper (1); An operating chamber (3) connected to the outlet end of the feed hopper (1), wherein the operating chamber (3) is enclosed by a box plate (2); The shearing knife group comprises two groups of rotatable roller shafts (6) arranged along the length direction of the working chamber (3), and a plurality of movable blades (9) and movable knife spacers (10) sleeved on the middle ends of the roller shafts (6); the fixed knife body (13) cooperates with the movable knife spacers (10) on the corresponding side.

7. The double-shaft shredder according to claim 6, characterized in that: In the same roller shaft (6), the saw teeth of each movable blade (9) are arranged in a staggered manner in a rotation direction.

8. The double-shaft shredder according to claim 6, characterized in that: The material discharging end of the working cavity (3) is connected to a material screening element.

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