Cutter head shell and cutter head

Abstract

The utility model relates to a cutterhead shell and a cutterhead. The cutter head shell is provided with a protection cavity, a notch is formed in the outer side face of the cutter head shell and communicated with the protection cavity, the protection cavity is used for providing a space for a cutting component to rotate and enabling at least part of the cutting component to be exposed out of the notch in the rotating process, and a dust falling opening is formed in the inner side face of the cutter head shell. The dust falling opening is communicated with the protection cavity, and the dust falling opening and the notch are oppositely arranged in the radial direction of the cutterhead shell. The dust falling opening and the notch are oppositely arranged, so that when the blade rotates at a high speed, crushed grass brought into the protection cavity through the notch can be directly thrown out of the dust falling opening in the other opposite side under the action of centrifugal force, the conditions of accumulation of the crushed grass on the side face of the cutter head shell, blockage and the like are reduced, the influence on work of the blade is reduced, and the service life of the cutter head is prolonged.

Description

Technical Field

[0001] The present application relates to the field of cutter discs, and in particular to a cutter disc housing and a cutter disc. Background Art

[0002] The blade of the lawn mower drives the blade to rotate at high speed to cut the grass on the lawn. When the blade rotates at high speed in the blade housing, it will bring the cut grass into the blade housing. The cut grass will accumulate in the blade housing and cause blockage, affecting the balance and stability of the blade, making it difficult for the blade to work normally, and causing wear between the blade housing and the blade, thus reducing the service life of the blade. Utility Model Content

[0003] Based on this, it is necessary to provide a cutter disc housing and a cutter disc to address the problem that grass clippings may be brought into the cutter disc housing by the blades, affecting the operation of the blades and reducing the service life of the cutter disc.

[0004] In the first aspect, a blade disc housing is provided with a protective cavity, a notch is provided on the outer side of the blade disc housing, the notch is communicated with the protective cavity, the protective cavity is used to provide a space for a cutting component to rotate, and the cutting component is at least partially exposed from the notch during rotation, an ash outlet is provided on the inner side of the blade disc housing, the ash outlet is communicated with the protective cavity, and the ash outlet and the notch are arranged opposite to each other in the radial direction of the blade disc housing.

[0005] In one of the embodiments, along the thickness direction of the blade disc housing, the blade disc housing includes a top wall and a bottom wall, a portion of the bottom wall gradually decreases in thickness toward the center of the top wall to form a guide slope, and is connected to the top wall; another portion of the bottom wall is spaced apart from the top wall to form the protective cavity, the notch and the ash outlet.

[0006] In one of the embodiments, a guide groove is recessed on the outer surface of the cutter disc housing toward the inner side thereof, and the guide groove extends along a preset direction, and the preset direction is configured as a direction around the outer periphery of the axis of the cutter disc housing.

[0007] In one of the embodiments, at least a portion of the groove wall surface of the guide groove along the preset direction is a curved surface, and / or at least a portion of the groove wall surface of the guide groove along the radial direction is a curved surface.

[0008] In one embodiment, the blade disc housing includes a connecting portion and a mowing portion, wherein the mowing portion is arranged on the outer periphery of the connecting portion, and the mowing portion is provided with the protective cavity, the notch and the guide groove. Along the radial direction of the blade disc housing, at least part of the connecting portion and at least part of the mowing portion have the same cross-sectional thickness.

[0009] In one embodiment, the notches include a plurality of notches, the guide grooves include a plurality of guide grooves, and all the notches and all the guide grooves are alternately arranged along the preset direction.

[0010] In one of the embodiments, the guide groove is arranged close to the periphery of the cutter disc housing.

[0011] In one of the embodiments, along the thickness direction of the cutter disc housing, the outer surface includes a first surface and a second surface that are opposite to each other, and the guide groove is formed by the first surface being recessed in a direction toward the second surface.

[0012] In one of the embodiments, along the radial direction of the cutter disc housing, the cross-sectional width of the guide groove first increases and then decreases.

[0013] In a second aspect, a cutter disc comprises the cutter disc housing as described in the first aspect.

[0014] The above-mentioned cutter disc is provided with an ash-dropping opening on the inner side surface of the cutter disc housing, and a notch is provided on the outer side surface of the cutter disc housing. The ash-dropping opening and the notch are provided opposite to each other along the radial direction of the cutter disc housing; in other words, the ash-dropping opening and the notch are provided on two opposite sides of the cutter disc housing, respectively, so that the ash-dropping opening and the notch are provided opposite to each other along the radial direction of the cutter disc housing; it can also be understood that the ash-dropping opening and the notch are provided on opposite sides of the protective cavity along the radial direction, respectively. The ash-dropping opening and the notch are provided opposite to each other, so that when the blade rotates at high speed, the grass clippings brought into the protective cavity through the notch can be directly thrown out from the ash-dropping opening on the other opposite side under the action of centrifugal force, thereby reducing the accumulation of grass clippings on the side surface of the cutter disc housing, reducing blockages, etc., reducing the impact on the blade operation, and increasing the service life of the cutter disc. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A stereoscopic image from one perspective of a cutter disc provided in an embodiment of the present application.

[0016] Figure 2 A stereoscopic image from another perspective of a cutter disc provided in an embodiment of the present application.

[0017] Figure 3 A cross-sectional view of a cutter disc provided in an embodiment of the present application.

[0018] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0019] Figure 5 for Figure 3 Enlarged view of point B in the middle.

[0020] Explanation of the reference numerals: 100, blade disc; 10, blade disc housing; 1, connecting portion; 11, first portion; 111, first top surface; 112, bottom surface; 12, second portion; 121, second top surface; 13, third portion; 2, mowing portion; 21, guide groove; 22, protective cavity; 23, notch; 24, ash outlet; 3, first surface; 4, second surface; 5, outer side surface; 6, inner side surface; 20, cutting component; 6, top wall; 7, bottom wall; 8, guide slope. DETAILED DESCRIPTION

[0021] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0022] The blade of the lawn mower drives the blade to rotate at high speed to cut the grass on the lawn. When the blade rotates at high speed in the blade housing, it will bring the cut grass and branches and other debris into the blade housing. The cut grass will accumulate in the blade housing and cause blockage, affecting the balance and stability of the blade, making it difficult for the blade to work normally, and causing wear between the blade housing and the blade, thus reducing the service life of the blade.

[0023] See also Figure 1 and Figure 5 Based on this, the embodiment of the present application provides a blade disc housing 10, which is provided with a protective cavity 22, and the outer side surface 5 of the blade disc housing 10 is provided with a notch 23, which is connected to the protective cavity 22, and the protective cavity 22 is used to provide a space for the cutting component 20 to rotate, and to make the cutting component 20 at least partially exposed from the notch 23 during the rotation process, and the inner side surface 6 of the blade disc housing 10 is provided with an ash outlet 24, which is connected to the protective cavity 22, and along the radial direction of the blade disc housing 10, the ash outlet 24 and the notch 23 are arranged back to back.

[0024] See also Figure 5In the embodiment of the present application, the cutting component 20 may be a blade or a sawtooth blade. The protective cavity 22 is used to provide a space for the cutting component 20 to rotate, and to allow the cutting component 20 to at least partially expose the notch 23 during the rotation process. The cutting component 20 is mounted on the blade housing 10 by means of a stud and a nut, and the cutting component 20 can rotate freely relative to the stud. When the blade housing 10 rotates, the cutting component 20 rotates in the protective cavity 22 driven by the blade housing 10. When the cutting component 20 is screwed into the outside of the protective cavity 22, the grass can be cut. When the cutting component 20 is screwed into the protective cavity 22, the protective cavity 22 protects the cutting component 20.

[0025] See also Figure 5 , by setting the dust outlet 24 on the inner side 6 of the blade housing 10, and setting the notch 23 on the outer side 5 of the blade housing 10, the dust outlet 24 and the notch 23 are set opposite to each other in the radial direction of the blade housing 10; in other words, the dust outlet 24 and the notch 23 are respectively set on two opposite sides of the blade housing 10, so that the dust outlet 24 and the notch 23 are set opposite to each other in the radial direction of the blade housing 10; it can also be understood that the dust outlet 24 and the notch 23 are respectively set on opposite sides of the protection cavity 22 in the radial direction. The dust outlet 24 and the notch 23 are set opposite to each other, so that when the blade rotates at a high speed, the grass cutters brought into the protection cavity 22 through the notch 23 can be directly thrown out from the dust outlet 24 on the other side under the action of centrifugal force, thereby reducing the accumulation of grass cutters on the side of the blade housing 10, reducing blockage, etc., reducing the impact on the blade work, and improving the service life of the blade 100. At the same time, the ash outlet 24 is arranged in the radial direction of the blade disc housing 10 and is arranged opposite to the slot 23, which can reduce the setting area of ​​the ash outlet 24 and reduce wind resistance. Compared with being arranged on the bottom surface of the blade disc housing 10, the ash outlet 24 is arranged on the inner side surface 6 of the blade disc housing 10, which can reduce direct contact with obstacles and objects such as grass, and reduce the obstruction of objects to the high-speed rotating blade disc 100.

[0026] See also Figure 4 and Figure 5In some embodiments, along the thickness direction of the blade disc housing 10, the blade disc housing 10 includes a top wall 6 and a bottom wall 7, a portion of the bottom wall 7 gradually decreases in thickness toward the center of the top wall 6 to form a guide slope 8, and is connected to the top wall 6; in other words, the top wall 6 and the bottom wall 7 are arranged in a stepped manner, and the top wall 6 and the bottom wall 7 are connected by the guide slope 8; another portion of the bottom wall 7 is spaced from the top wall 6 to form a protective cavity 22, a notch 23, and an ash drop opening 24. By providing the guide slope 8, a guide angle is formed between the top wall 6 and the bottom wall 7 of the blade disc housing 10 along the thickness direction, reducing the friction between the bottom surface of the blade disc 100 and the ground, and improving the passability of the blade disc 100 on the ground when the lawn mower is moving, so that the lawn mower can pass through uneven ground or obstacles more easily.

[0027] Furthermore, during the mowing process, the high-speed rotation of the blade disc 100 will be subject to greater wind resistance. When the blade disc 100 rotates at high speed, the air around the blade disc 100 comes into contact with the surface of the blade disc 100, and due to the influence of friction and pressure, a force that hinders the movement of the blade disc 100 is generated. The blade disc 100 needs to consume energy to overcome the air resistance, so the wind resistance will reduce the rotation speed of the blade disc 100, thereby reducing the mowing efficiency of the blade disc 100.

[0028] In the embodiment of the present application, the preset direction is Figure 1 and Figure 2 The radial direction of the blade housing 10 is as follows: Figure 1 and Figure 2 Direction B shown.

[0029] See also Figure 1 In some embodiments, the outer surface of the blade disc housing 10 is provided with a guide groove 21 in the direction toward the inside thereof, and the guide groove 21 extends along a preset direction, and the preset direction is configured as a direction around the outer periphery of the axis of the blade disc housing 10. In other words, the guide groove 21 can extend along the rotation direction of the blade disc housing 10. The guide groove 21 can change the flow state of air along the outer surface of the blade disc housing 10, change the flow direction and speed of air, make the air flow through the outer surface of the blade disc housing 10 more stably, reduce the generation of turbulence and separation flow, and thus reduce wind resistance. In addition, the guide groove 21 can make the airflow produce a more uniform pressure distribution when flowing through the surface of the blade disc housing 10, reduce local resistance, and thus reduce overall wind resistance.

[0030] See also Figure 1, the embodiment of the present application does not limit the contour shape of the guide groove 21. For example, the contour shape of the guide groove 21 may be square, elliptical, leaf-shaped, etc. In some embodiments, along the radial direction of the cutter disc housing 10, the cross-sectional width of the guide groove 21 first increases and then decreases, so that the guide groove 21 is a waist-shaped groove with obliquely arranged at both ends of the waist. The cross-sectional width of the guide groove 21 first increases and then decreases, which can accelerate or decelerate the air on the surface of the cutter disc housing 10. The larger cross-sectional width of the guide groove 21 allows the air to flow more smoothly, reducing the pressure gradient of the air, thereby reducing wind resistance. The subsequent reduction in cross-sectional width can accelerate the airflow, allowing it to leave the cutter disc housing 10 as soon as possible, reduce the generation of negative pressure areas, and further reduce wind resistance.

[0031] See also Figure 1 , the embodiment of the present application does not limit the surface shape of the guide groove 21. For example, the inner wall surface of the guide groove 21 may be a smooth surface or a surface formed by the edges of multiple surfaces. Preferably, in some embodiments, at least part of the groove wall surface of the guide groove 21 along the preset direction is a curved surface, and at least part of the groove wall surface of the guide groove 21 along the radial direction is a curved surface. At least part of the inner wall surface of the guide groove 21 is set to a smooth curved surface. The smooth curved surface has no concave-convex or texture structure and has a low surface roughness, which can reduce frictional resistance, improve fluid flow performance, and reduce the occurrence of turbulence, thereby helping to reduce wind resistance. Further preferably, all the groove wall surfaces of the guide groove 21 along the preset direction and along the radial direction are curved surfaces.

[0032] See also Figure 1 and Figure 2 , the embodiment of the present application does not limit the setting position of the guide groove 21. The outer surface of the cutter disc housing 10 includes a first surface 3, a second surface 4 and an outer side surface 5. Along the thickness direction of the cutter disc housing 10, the first surface 3 and the second surface 4 are arranged back to back, and the outer side surface 5 is sandwiched between the first surface 3 and the second surface 4. In the embodiment of the present application, the first surface 3 is a surface of the cutter disc housing 10 facing away from the ground, and the second surface 4 is a surface of the cutter disc housing 10 close to the ground. The guide groove 21 may be recessed on the first surface 3, and / or, the second surface 4, and / or, the outer side surface 5. Exemplarily, the guide groove 21 may be arranged only on the first surface 3, or on the first surface 3 or the second surface 4 at the same time, or on the first surface 3, the second surface 4 and the outer side surface 5 at the same time.

[0033] Since the first surface 3 and the second surface 4 are the contact surfaces of the blade housing 10 that are mainly subject to wind resistance and have a large contact area with the air, the guide grooves 21 are arranged on the first surface 3 and the second surface 4 to guide more air and improve the effect of reducing wind resistance. Figure 1In some embodiments, the guide groove 21 is formed by the first surface 3 being recessed in the direction of the second surface 4, so that the guide groove 21 is set on a surface of the blade disc housing 10 facing away from the ground, that is, on the upper surface of the blade disc housing 10, which can reduce the interference and obstruction of the guide groove 21 by weeds and other objects.

[0034] Furthermore, the guide groove 21 may be disposed near the center of the cutter head housing 10 or near the periphery of the cutter head housing 10. Figure 1 Preferably, in some embodiments, the guide groove 21 is arranged near the periphery of the cutter disc housing 10. Since the guide groove 21 is formed by the outer surface of the cutter disc housing 10 being recessed inward, the cutter disc housing 10 provided with the guide groove 21 is required to have a certain thickness, and the periphery of the cutter disc housing 10 usually needs to be provided with a cutting component 20 so as to have a certain thickness. By arranging the guide groove 21 at the periphery of the cutter disc housing 10, the guide groove 21 can be arranged conveniently by utilizing the thickness of the periphery, and the thickness of the position close to the center of the cutter disc housing 10 can be made thinner, which is beneficial to maintaining a good uniformity of the thickness of the cutter disc housing 10 from the center to the periphery, realizing a lightweight design of the cutter disc housing 10, and further reducing wind resistance.

[0035] See also Figure 2 and Figure 3 In some embodiments, the blade housing 10 includes a connecting portion 1 and a mowing portion 2 connected to each other, and the mowing portion 2 is disposed on the outer periphery of the connecting portion 1. Figure 3 , along the radial direction of the blade disc housing 10, at least part of the connecting portion 1 and at least part of the mowing portion 2 have the same cross-sectional thickness, and the mowing portion 2 is provided with a guide groove 21. It can be understood that the connecting portion 1 is used to install a drive shaft such as a motor output shaft. The blade disc housing 10 is subjected to torque and mowing resistance from the motor output during operation. The uniform thickness of the connecting portion 1 and the mowing portion 2 can make these forces more evenly distributed on the entire blade disc housing 10, reduce the possibility of local stress concentration, improve the bearing capacity of the blade disc housing 10, and reduce the risk of deformation and rupture of the blade disc housing 10. In addition, the connecting portion 1 with uniform thickness can reduce the stress difference at different positions of the blade disc housing 10, thereby reducing the vibration and noise during the operation of the lawn mower. Furthermore, the connecting portion 1 and the mowing portion 2 with uniform thickness have high structural strength, so that the blade disc housing 10 does not need to add additional reinforcing ribs, and can also obtain better structural stability.

[0036] See also Figure 2 and Figure 3 Further, along the radial direction of the blade housing 10, the connecting portion 1 includes a first portion 11, a second portion 12 and a third portion 13. The second portion 12 is arranged on the outer periphery of the first portion 11, the first portion 11 is arranged on the outer periphery of the third portion 13, the mowing portion 2 is arranged on the outer periphery of the second portion 12, and the third portion 13 is used to install the motor output shaft. Figure 3 , the first part 11 gradually tilts from the third part 13 to the direction of the second part 12, and the first top surface 111 and the bottom surface 112 of the first part 11 along its own thickness direction are both inclined surfaces. The second top surface 121 of the second part 12 is flush with at least part of the upper surface of the mowing part 2. It should be noted that in the related art, reinforcing ribs are usually set on the first surface of the blade disc housing 10 to improve the overall structural strength of the blade disc 100, but the presence of reinforcing ribs will increase the contact area with the air and increase the wind resistance of the blade disc housing 10 during rotation, which will not only increase the torque and current of the blade disc 100 motor, but also cause the rotation speed of the blade disc 100 to decrease, affecting the mowing effect. The embodiment of the present application does not set reinforcing ribs on the first surface 3 of the blade disc housing 10, but sets the first top surface 111 and the second top surface 121 of the first part 11 and the second part 12 to smooth surfaces, which can reduce wind resistance.

[0037] See also Figure 1 In some embodiments, the notches 23 include a plurality of notches, the guide grooves 21 include a plurality of notches, and all the notches 23 and all the guide grooves 21 are alternately arranged along a preset direction. In other words, along the preset direction, the notches 23 and the guide grooves 21 are arranged in a manner of notches 23-guide groove 21-notches 23-guide groove 21-notches 23-notches 23-guide groove 21-notches 23.

[0038] In summary, the blade disc housing 10 provided in the embodiment of the present application has at least the following technical effects: First, by arranging the ash outlet 24 and the notch opposite to each other, the grass removal effect can be improved and the rotational resistance can be reduced. Second, by setting the guide angle, the ground passability of the blade disc 100 can be improved. Third, by setting the guide groove 21, the wind resistance encountered by the blade disc housing 10 during high-speed rotation can be reduced. Fourth, making the inner wall surface of the guide groove 21 a smooth curved surface, and making the guide groove 21 a waist-shaped groove with oblique ends of the waist can further reduce wind resistance. Fifth, by setting the connecting part 1 and the mowing part 2 of uniform thickness, the problem of increased wind resistance caused by setting reinforcing ribs can be avoided while ensuring the structural strength of the blade disc housing 10.

[0039] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does 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 cannot be understood as a limitation on the present application.

[0040] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0041] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0042] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0043] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0044] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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.

[0045] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A cutter head housing, characterized in that: The blade disc housing is provided with a protection cavity, the outer side surface of the blade disc housing is provided with a notch, the notch is communicated with the protection cavity, the protection cavity is used to provide a space for the cutting component to rotate, and the cutting component is at least partially exposed from the notch during the rotation process, the inner side surface of the blade disc housing is provided with an ash dropout opening, the ash dropout opening is communicated with the protection cavity, and along the radial direction of the blade disc housing, the ash dropout opening and the notch are arranged opposite to each other; Along the thickness direction of the blade disc housing, the blade disc housing includes a top wall and a bottom wall, a portion of the bottom wall gradually decreases in thickness toward the center of the top wall to form a guide slope and is connected to the top wall; another portion of the bottom wall is spaced apart from the top wall to form the protective cavity, the groove and the ash outlet.

2. The cutter head housing according to claim 1, characterized in that: The outer surface of the cutter disc housing is provided with a guide groove in a direction toward the inside thereof, and the guide groove extends along a preset direction, and the preset direction is configured as a direction around the outer periphery of the axis of the cutter disc housing.

3. The cutter head housing according to claim 2, characterized in that: At least a portion of the groove wall surface of the guide groove along the preset direction is a curved surface, and / or at least a portion of the groove wall surface of the guide groove along the radial direction is a curved surface.

4. The cutter head housing according to claim 2, characterized in that: The blade disc housing includes a connecting portion and a mowing portion, wherein the mowing portion is arranged on the outer periphery of the connecting portion, and the mowing portion is provided with the protective cavity, the notch and the guide groove. Along the radial direction of the blade disc housing, at least part of the connecting portion and at least part of the mowing portion have the same cross-sectional thickness.

5. The cutter head housing according to claim 2, characterized in that: The notches include a plurality of notches, the guide grooves include a plurality of guide grooves, and all the notches and all the guide grooves are alternately arranged along the preset direction.

6. The cutter head housing according to any one of claims 2 to 5, characterized in that: The guide groove is arranged close to the periphery of the cutter disc housing.

7. The cutter head housing according to any one of claims 2 to 5, characterized in that: Along the thickness direction of the cutter disc housing, the outer surface includes a first surface and a second surface that are opposite to each other, and the guide groove is formed by the first surface being recessed in a direction toward the second surface.

8. The cutter head housing according to any one of claims 2 to 5, characterized in that: Along the radial direction of the cutter disc housing, the cross-sectional width of the guide groove first increases and then decreases.

9. A cutter disc, characterized in that: The cutter disc comprises a cutter disc housing as claimed in any one of claims 1 to 8.

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