Connecting shaft assembly, cutting equipment and detection device

Abstract

The utility model discloses a connecting shaft assembly, cutting equipment and a detection device. The connecting shaft assembly comprises a connecting part, a flange part, at least two sets of positioning structures arranged on the flange part and a plurality of positioning pieces arranged on the positioning structures in a penetrating mode, wherein the connecting part and the flange part are coaxially and oppositely connected. When the tool bit is inserted into the cavity, the multiple positioning pieces penetrate through the positioning structures one by one, so that the tool bit can rotate with the multiple positioning pieces penetrating through one positioning structure as lever fulcrums, the tool bit can conveniently penetrate through the multiple positioning pieces on the other positioning structure to drive the tool bit to rotate, and the axis of the tool bit can be conveniently and rapidly adjusted; therefore, the effect that the tool bit and the axis of the connecting shaft assembly are coaxially arranged is achieved. And moreover, the tool bit is fixed through the plurality of positioning pieces, so that the stability of the tool bit in the cavity is improved, and the effect of improving the stability of the coaxiality between the tool bit and the main shaft is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of cutting devices, and in particular to a connecting shaft assembly and a cutting device having the connecting shaft assembly. Background Art

[0002] In the production process of some products, it is necessary to cut or puncture the products. Generally, a rotating cutter head is used to act on the products to cut or puncture the products, such as using a cutter head to roll the teeth of a gear or to perforate a chip.

[0003] Generally, the cutter head is coaxially connected to the main shaft through a connecting shaft. When replacing or installing different cutter heads, the position of the cutter head relative to the connecting shaft needs to be adjusted several times so that the axis of the cutter head coincides with the axis of the connecting shaft. The existing connecting shaft is not convenient for quickly coaxially fixing cutter heads of different sizes, resulting in low efficiency in cutter head installation. Utility Model Content

[0004] The purpose of the present application is to provide a connecting shaft assembly and a cutting device having the connecting shaft assembly. The technical solution provided in the present application is used to achieve rapid coaxial connection between a cutter head and a connecting shaft assembly, thereby solving the problem of low efficiency in installing the cutter head.

[0005] The present application provides a connecting shaft assembly, which is used to install a cutter head. The connecting shaft assembly includes a connecting portion and a flange portion that are coaxial and relatively connected, and at least two groups of positioning structures and a plurality of positioning members arranged on the flange portion. The connecting portion is used to input torque. A cavity is provided along the axial direction of the flange portion on a side of the flange portion away from the connecting portion, and the cavity is used to accommodate the cutter head. At least two groups of positioning structures are arranged in an array along the axial direction of the flange portion, and each group of positioning structures includes at least three positioning holes arranged on the surface of the flange portion. The at least three positioning holes of each group of positioning structures are arranged in an annular shape on the flange portion, and the axes of the positioning holes are perpendicular to the axes of the flange portion, and the positioning holes are connected to the cavity. The connecting shaft assembly also includes a plurality of positioning members, and the plurality of positioning members are arranged one-to-one with the at least three positioning blocks of each group of positioning structures. A portion of each positioning member extends into the cavity through the corresponding positioning hole, and the positioning member acts on the cutter head in the cavity.

[0006] In the above implementation process, when the cutter head is inserted into the cavity, multiple positioning members pass through multiple positioning blocks of one group of positioning structures to act on the cutter head, so as to quickly position the axis of one end of the cutter head, so that the axis of one end of the cutter head intersects with the axis of the flange. Then, multiple positioning members pass through multiple positioning holes of another group of positioning structures to act on the cutter head, so that the cutter head can rotate with multiple positioning members on one group of positioning structures as a lever fulcrum, so as to drive the cutter head to rotate through multiple positioning members on another group of positioning structures, so as to quickly adjust the axis of the cutter head, thereby achieving the effect of coaxial setting of the cutter head and the axis of the connecting shaft assembly. In addition, fixing the cutter head by multiple positioning members helps to improve the stability of the cutter head in the cavity, so as to achieve the effect of improving the stability of the coaxiality between the cutter head and the main shaft.

[0007] In some embodiments, the flange portion is arranged in a conical shape, and the diameter of the flange portion gradually decreases in a direction away from the connecting portion.

[0008] Based on the above-mentioned connecting shaft assembly, the present application provides a cutting device, which includes a main shaft and the above-mentioned connecting shaft assembly, the main shaft is connected to the connecting part, the axis of the main shaft coincides with the axis of the flange part, and the main shaft is used to input torque to the connecting part.

[0009] In some embodiments, along the axial direction of the main shaft, the main shaft is provided with a groove for accommodating the connecting portion, and the outer side surface of the connecting portion is cooperatively connected with the inner side wall of the groove.

[0010] In some embodiments, a connecting pin is arranged in the groove. A mounting hole is provided through the connecting portion along the axial direction. When the connecting portion is located in the groove, the connecting pin is inserted into the mounting hole and is threadedly connected with the connecting portion.

[0011] In some embodiments, a boss is formed on one side of the connection portion close to the flange portion, and a support surface is formed on the side of the boss away from the flange portion, and the support surface is perpendicular to the axis of the connection portion. When the main shaft is connected to the connection portion, the boss contacts the end of the main shaft.

[0012] Based on the above-mentioned connecting shaft assembly, the present application also provides a detection device, which is used to perform coaxial detection on the above-mentioned connecting shaft assembly and the cutter head installed on the connecting shaft assembly, and the detection device includes a light-emitting assembly, which is arranged on the side of the connecting part away from the flange part, and the light-emitting assembly is used to emit a light beam, and the light path of the light beam passes through the connecting part, the cavity, and the cutter head in sequence along the axial direction of the connecting shaft assembly, and finally the light beam extends in the direction of the flange part away from the connecting part. The optical axis of the light-emitting assembly coincides with the axis of the connecting shaft assembly.

[0013] In some embodiments, the detection device further includes a first light-displaying surface disposed on a side surface of the tool head, and the first light-displaying surface is parallel to an axial direction of the tool head.

[0014] In some embodiments, the detection device further comprises a baffle disposed opposite to the flange along the axis direction of the connecting shaft assembly, the baffle having a second light display surface facing the flange, the second light display surface being perpendicular to the axis of the connecting shaft assembly. A display area is disposed on the second light display surface.

[0015] In some embodiments, the display area includes a plurality of concentric circles, and an extension line of the axis of the connecting shaft assembly passes through the centers of the plurality of concentric circles.

[0016] Compared with the prior art, the beneficial effect of the present application is that: a connecting shaft assembly is provided, and when the cutter head is inserted into the cavity, a plurality of positioning members pass through a plurality of positioning blocks of one group of positioning structures one by one to act on the cutter head, so as to quickly position the axis of one end of the cutter head, so that the axis of one end of the cutter head intersects with the axis of the flange. Then, a plurality of positioning members pass through a plurality of positioning holes of another group of positioning structures one by one to act on the cutter head, so that the cutter head can be rotated by passing through a plurality of positioning members on a group of positioning structures as a lever fulcrum, so as to drive the cutter head to rotate through a plurality of positioning members on another group of positioning structures, so as to quickly adjust the axis of the cutter head, so as to achieve the effect of coaxial arrangement of the cutter head and the axis of the connecting shaft assembly. In addition, fixing the cutter head by a plurality of positioning members helps to improve the stability of the cutter head in the cavity, so as to achieve the effect of improving the stability of the coaxiality between the cutter head and the spindle. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 It is a partial structural schematic diagram of a cutting device according to one embodiment of the present application;

[0019] Figure 2 It is a partial structural cross-sectional view of a connecting shaft assembly according to one embodiment of the present application;

[0020] Figure 3 is a perspective view of a cutting device according to another embodiment of the present application;

[0021] Figure 4 It is a schematic diagram of the working state of a detection device according to one embodiment of the present application;

[0022] Figure 5 is a schematic diagram of the working state of a detection device according to another embodiment of the present application;

[0023] Figure 6 It is a side view of a baffle of a detection device according to one embodiment of the present application.

[0024] Among them: 10, connecting shaft assembly; 11, connecting part; 111, mounting hole; 112, boss; 1121, supporting surface; 12, flange part; 121, cavity; 13, positioning structure; 131, positioning hole; 14, positioning piece; 20, tool head; 30, main shaft; 31, groove; 311, connecting pin; 40, detection device; 41, light-emitting assembly; 411, light beam; 42, first light-displaying surface; 43, baffle; 431, second light-displaying surface; 432, concentric circles. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0026] It should be noted that when a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a central component at the same time. When a component is considered to be "located on" another component, it may be directly located on the other component or there may be a central component at the same time. The terms "top", "bottom", "upper", "lower", "left", "right", "front", "back", and similar expressions used herein are for illustrative purposes only.

[0027] Unless otherwise specified, the term "plurality" as used herein means two or more than two.

[0028] The terms "first", "second", etc. are only used to distinguish different objects and shall not be understood as indicating or implying relative importance or implying the quantity, specific order or primary and secondary relationship of the indicated technical features.

[0029] The term "perpendicular" is used to describe an ideal state between two components. In actual production or use, the two components may be in a state that is approximately perpendicular to each other.

[0030] It should be recognized that the dimensions of the layers, regions, films, plates, blocks, columns, convex parts, concave parts, etc. shown in the drawings are given for better understanding and more convenient description, and the present application is not limited to the dimensions shown in the drawings. In order to make the present application clear, elements not related to the description are omitted from the details of this specification.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0032] The present application provides a connecting shaft assembly, which is used to install a cutter head. The connecting shaft assembly includes a connecting portion and a flange portion that are coaxial and relatively connected, and at least two groups of positioning structures arranged on the flange portion. The connecting portion is used to input torque. A cavity is provided along the axial direction of the flange portion on a side of the flange portion away from the connecting portion, and the cavity is used to accommodate the cutter head. At least two groups of positioning structures are arranged along the axial direction of the flange portion, and each group of positioning structures includes at least three positioning holes arranged on the surface of the flange portion. The at least three positioning holes of each group of positioning structures are arranged in an annular shape on the flange portion, and the axis of the positioning holes is perpendicular to the axis of the flange portion, and the positioning holes are connected to the cavity. The connecting shaft assembly also includes a plurality of positioning members, and the plurality of positioning members are arranged one-to-one with the at least three positioning blocks of each group of positioning structures. A portion of each positioning member extends into the cavity through the corresponding positioning hole, and the positioning member acts on the cutter head in the cavity.

[0033] In the above implementation process, when the cutter head is inserted into the cavity, multiple positioning members pass through multiple positioning blocks of one group of positioning structures to act on the cutter head, so as to quickly position the axis of one end of the cutter head, so that the axis of one end of the cutter head intersects with the axis of the flange. Then, multiple positioning members pass through multiple positioning holes of another group of positioning structures to act on the cutter head, so that the cutter head can rotate with multiple positioning members on one group of positioning structures as a lever fulcrum, so as to drive the cutter head to rotate through multiple positioning members on another group of positioning structures, so as to quickly adjust the axis of the cutter head, thereby achieving the effect of coaxial setting of the cutter head and the axis of the connecting shaft assembly. In addition, fixing the cutter head by multiple positioning members helps to improve the stability of the cutter head in the cavity, so as to achieve the effect of improving the stability of the coaxiality between the cutter head and the main shaft.

[0034] Some embodiments of the present application will be described below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0035] The cutter head 20 is a rod-shaped component with a uniform diameter, and one end of the cutter head 20 is set as a tip or provided with a blade for cutting or puncturing the product.

[0036] See also Figure 1 The embodiment of the present application provides a cutting device, including a driver (not shown), a main shaft 30, a connecting shaft assembly 10 and a cutter head 20, wherein the cutter head 20 is coaxially connected to the main shaft 30 through the connecting shaft assembly 10. The main shaft 30 is driven to rotate by the driver, so that the main shaft 30 drives the connecting shaft assembly 10 and the cutter head 20 to rotate, thereby realizing the cutting function of the cutting device. Among them, when the driver is a power device with an output reciprocating force such as a linear motor, a cylinder, a hydraulic cylinder, etc.

[0037] In some embodiments, see Figure 1 and Figure 2 The connecting shaft assembly 10 includes a connecting portion 11 and a flange portion 12 that are coaxially and relatively connected, and two sets of positioning structures 13 and a plurality of positioning members 14 arranged on the flange portion 12. The connecting portion 11 is fixedly connected to the main shaft 30. The connecting portion 11 and the flange portion 12 are hollow components. The flange portion 12 has a cavity 121 on the side away from the connecting portion 11 for accommodating the cutter head 20.

[0038] Two groups of positioning structures 13 are arranged along the axis direction of the flange portion 12. Each group of positioning structures 13 includes three positioning holes 131 opened on the surface of the flange portion 12. The three positioning holes 131 of each group of positioning structures 13 are arranged in a ring shape on the flange portion 12. The axis of the positioning hole 131 is perpendicular to the axis of the flange portion 12. The positioning hole 131 is connected to the cavity 121. A plurality of positioning members 14 are arranged in one-to-one correspondence with at least three positioning blocks of each group of positioning structures 13. A portion of each positioning member 14 passes through the corresponding positioning hole 131 and extends into the cavity 121. The positioning member 14 acts on the cutter head 20 in the cavity 121.

[0039] For the sake of convenience of explanation, one group of positioning structures 13 is the first positioning structure 13, and the other group of positioning structures 13 is the second positioning structure 13. The positioning holes 131 in the first positioning structure 13 are the first positioning holes 131, and the positioning holes 131 in the second positioning structure 13 are the second positioning holes 131. The positioning members 14 passing through the first positioning holes 131 are the first positioning members 14, and the positioning members 14 passing through the second positioning holes 131 are the second positioning members 14.

[0040] When one end of the cutter head 20 is inserted into the cavity 121, three first positioning members 14 are respectively passed through the corresponding first positioning holes 131 and extend into the cavity 121, so that the three first positioning members 14 are respectively in contact with the cutter head 20, and the axis of the cutter head 20 is intersected with the axis of the flange portion 12 by adjusting the three first positioning members 14 respectively. Three second positioning members 14 are respectively passed through the corresponding second positioning holes 131 and extended into the cavity 121, so that the three second positioning members 14 are respectively in contact with the cutter head 20, and the three second positioning members 14 are respectively adjusted so that the cutter head 20 can rotate in the cavity 121 with the three positioning members 14 as lever fulcrums, thereby adjusting the axial direction of the cutter head 20. According to the principle of fixing a straight line with two points, the cutter head 20 is respectively adjusted and fixed along the axis of the flange by the first positioning member 14 and the second positioning member 14, so that the axis of the cutter head 20 is always in the same straight line with the axis of the flange part 12, thereby achieving the effect of the connecting shaft assembly 10 for concentrically connecting the cutter head 20 and the main shaft 30, thereby ensuring the accuracy of the coaxial rotation of the cutter head 20 driven by the main shaft 30.

[0041] In some embodiments, the positioning member 14 is a bolt, and the bolt is threadedly connected to the flange portion 12 .

[0042] In other embodiments, the number of the positioning structures 13 is three, four or five groups, and the number of the positioning holes 131 on each group of positioning structures 13 is four, five or six. The present application does not limit the number of positioning structures 13 and positioning blocks in each positioning structure 13. By providing a plurality of positioning holes 131, the positioning member 14 can fully position the cutter head 20, so as to reduce the risk of the cutter head 20 being easily loosened relative to the flange portion 12.

[0043] In some embodiments, see Figure 2 and 3 The flange portion 12 is conically arranged, and the diameter of the flange portion 12 gradually decreases from the connecting portion 11 to the flange portion 12, so as to reduce the visual obstruction of the flange portion 12 to the cutter head 20, so that the user can observe the working status of the cutter head 20 in a timely and accurate manner, which helps to improve the cutting accuracy of the cutting equipment.

[0044] In some embodiments, along the axial direction of the main shaft 30, a groove 31 for accommodating the connecting portion 11 is provided on the main shaft 30, and the inner side wall of the groove 31 and the outer side surface of the connecting portion 11 are correspondingly provided with threads to achieve the effect of threaded fixing of the main shaft 30 and the connecting portion 11.

[0045] In some embodiments, the connection portion 11 is conical, and the diameter of the connection portion 11 gradually decreases from the flange portion 12 to the connection portion 11, so that the connection portion 11 can be quickly inserted into the groove 31 to achieve a quick installation effect.

[0046] In some embodiments, see Figure 1 and Figure 2 A boss 112 is formed on the side of the connecting portion 11 close to the flange portion 12, and a support surface 1121 is formed on the side of the boss 112 away from the flange portion 12, and the support surface 1121 is perpendicular to the axis of the connecting portion 11. When the main shaft 30 is fixedly connected to the connecting portion 11, the support surface 1121 is fitted with the end surface of the main shaft 30, so that the main shaft 30 supports the boss 112 through the support surface 1121 to improve the stability of the connection between the main shaft 30 and the connecting shaft assembly 10. At the same time, it can be understood that the connecting portion 11 is limited by the support surface 1121 to reduce the insufficient or excessive length of the connecting portion 11 inserted into the groove 31, resulting in an inaccurate connection between the connecting portion 11 and the main shaft 30, which helps to improve the stability of the coaxial connection between the connecting portion 11 and the main shaft 30.

[0047] In some embodiments, see Figure 2 and 3The connecting part 11 is provided with a mounting hole 111 along the axial direction, and the mounting hole 111 is communicated with the cavity 121. A connecting pin 311 is provided in the groove 31, and the inner wall of the mounting hole 111 and the outer wall of the connecting pin 311 are respectively provided with threads. When the connecting part 11 is inserted into the groove 31, the inner wall of the groove 31 and the outer wall of the connecting line act on the connecting part 11 respectively, so as to increase the contact area between the connecting part 11 and the main shaft 30, thereby helping to improve the stability of the connection between the main shaft 30 and the connecting part 11.

[0048] Based on the above-mentioned connecting shaft assembly 10, the present application also provides a detection device 40, see Figure 3 The detection device 40 includes a light emitting component 41 disposed on a side of the connecting portion 11 away from the flange portion 12, and the light emitting component 41 is used to emit a light beam 411. By means of light, the coaxiality of the connecting shaft component 10 and the cutter head 20 is detected quickly and accurately.

[0049] In some embodiments, see Figure 3 and Figure 4 The detection device 40 includes a first light-displaying surface 42 arranged on the side of the cutter head 20. The light path of the light beam 411 passes through the connecting portion 11, the cavity 121, and the cutter head 20 in sequence along the axial direction of the connecting shaft assembly 10. Finally, the light beam 411 extends toward the flange portion 12 away from the connecting portion 11; the optical axis of the light-emitting assembly 41 coincides with the axis of the connecting shaft assembly 10.

[0050] The cutter head 20 is a round rod member. When the cutter head 20 is fixedly connected to the flange portion 12, a light beam 411 is emitted through the light emitting component 41, so that the light beam 411 passes through the connection portion 11 and illuminates one end of the cutter head 20 in the cavity 121. According to the principle that light propagates in a straight line in a uniform medium, when the axis of the cutter head 20 is collinear with the axis of the connecting shaft component 10, the end of the cutter head 20 will block the side of the cutter head 20, so that the light emitting component 41 cannot directly illuminate the side of the cutter head 20. On the contrary, when the axis of the cutter head 20 is staggered with the axis of the connecting shaft component 10, a light path will be displayed on the first light display surface 42. Therefore, when the light emitting component 41 emits a light beam 411, by observing whether a light path is displayed on the first light display surface 42, the detection device 40 can detect that the axis of the cutter head 20 is collinear with the axis of the connecting shaft component 10.

[0051] In other embodiments, see Figure 5 and Figure 6The detection device 40 includes a baffle 43 movably arranged outside the flange portion 12, and a second light display surface 431 is arranged on the baffle 43. A display area is arranged on the second light display surface 431, and the display area includes a plurality of concentric circles 432. When it is necessary to perform coaxial detection on the axis of the connecting shaft assembly 10 and the axis of the cutter head 20, a light beam 411 is emitted by the light emitting assembly 41, so that the light beam 411 is emitted from the flange portion 12 in the direction from the connecting portion 11 to the flange portion 12, so that the second light display surface 431 is perpendicular to the axis of the flange portion 12, and the axis of the flange portion 12 passes through the center of the plurality of concentric circles 432. When the axis of the cutter head 20 is colinear with the axis of the connecting shaft assembly 10, the projection of the cutter head 20 along the axis direction of the connecting shaft assembly 10 is circular, and at this time, the projection of the cutter head 20 is projected on the second light display surface 431, and the projection of the cutter head 20 coincides with one of the concentric circles 432. When the axis of the cutter head 20 is collinear with the axis of the connecting shaft assembly 10, the projection of the cutter head 20 along the axis of the connecting shaft assembly 10 is an ellipse. At this time, the projection of the cutter head 20 is projected onto the second light display surface 431, and the projection of the cutter head 20 cannot coincide with any concentric circle 432. Therefore, by observing whether the projection of the cutter head 20 coincides with the concentric circle 432, the detection device 40 can detect that the axis of the cutter head 20 is collinear with the axis of the connecting shaft assembly 10.

[0052] Furthermore, by setting a plurality of concentric circles 432, when the baffle plate 43 and the flange portion 12 are spaced at the same distance, projections of the cutter heads 20 of different diameters can be presented on the baffle plate 43, so that the projections of the cutter heads 20 of different diameters overlap with the concentric circles 432 of different diameters, thereby satisfying the function of the detection device 40 being able to adapt to the coaxial detection of the cutter heads 20 of different diameters and the connecting shaft assembly 10.

[0053] In some embodiments, the light emitting component 41 is an LED lamp bead or a laser emitter.

[0054] In some embodiments, the light emitting component 41 is disposed at one end of the main shaft 30 facing the connecting portion 11. By disposing the light emitting component 41 on the main shaft 30, when the cutter head 20 is installed on the main shaft 30 through the connecting shaft assembly 10, the detection device 40 can quickly detect the coaxiality of the cutter head 20 and the connecting shaft assembly 10, thereby helping to improve the installation efficiency of the cutter head 20.

[0055] In other embodiments, see Figure 3 When the main shaft 30 is provided with a groove 31 , the light emitting component 41 is disposed in the groove 31 . When a connecting pin 311 is disposed in the groove 31 , the light emitting component 41 is disposed at the end of the connecting pin 311 .

[0056] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0057] The above is only a preferred embodiment of the present application and does not constitute any form of limitation to the present application. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application are within the scope of the technical solution of the present application.

Claims

1. A connecting shaft assembly for mounting a cutter head, characterized in that: It comprises a connecting portion and a flange portion which are coaxially and relatively connected, and at least two sets of positioning structures arranged on the flange portion; The connecting portion is used to input torque; A cavity is formed on one side of the flange away from the connecting portion along the axial direction of the flange, and the cavity is used to accommodate the cutter head; At least two groups of the positioning structures are arranged along the axis direction of the flange portion, each group of the positioning structures comprises at least three positioning holes provided on the surface of the flange portion, the at least three positioning holes of each group of the positioning structures are arranged in a ring shape on the flange portion, the axes of the positioning holes are perpendicular to the axis of the flange portion, and the positioning holes are communicated with the cavity; The connecting shaft assembly also includes a plurality of positioning members, which are arranged one-to-one corresponding to at least three positioning blocks of each group of the positioning structure. A portion of each positioning member extends into the cavity through the corresponding positioning hole, and the positioning member acts on the tool head in the cavity.

2. The connecting shaft assembly according to claim 1, characterized in that: The flange portion is arranged in a conical shape, and a diameter of the flange portion gradually decreases in a direction away from the connecting portion.

3. A cutting device, characterized in that: It comprises a main shaft and the connecting shaft assembly according to claim 1 or 2, wherein the main shaft is connected to the connecting part, the axis of the main shaft coincides with the axis of the flange part, and the main shaft is used to input torque to the connecting part.

4. The cutting device according to claim 3, characterized in that Along the axial direction of the main shaft, the main shaft is provided with a groove for accommodating the connecting portion, and the groove is used to accommodate the connecting portion.

5. The cutting device according to claim 4, characterized in that A connecting pin is arranged in the groove; The connecting portion is provided with a mounting hole along the axial direction; When the connecting portion is located in the groove, the connecting pin is inserted into the mounting hole and is threadedly connected with the connecting portion.

6. The cutting device according to claim 3, characterized in that: A boss is formed on one side of the connection portion close to the flange portion, and a support surface is formed on the side of the boss away from the flange portion, wherein the support surface is perpendicular to the axis of the connection portion; When the main shaft is connected to the connecting portion, the boss contacts the end of the main shaft.

7. A detection device, characterized in that: The detection device is used to perform coaxial detection on the connecting shaft assembly and the cutter head installed on the connecting shaft assembly in any one of claims 1 to 2, and the detection device includes a light emitting component, which is arranged on a side of the connecting portion away from the flange portion, and the light emitting component is used to emit a light beam, and the light path of the light beam passes through the connecting portion, the cavity, and the cutter head in sequence along the axial direction of the connecting shaft assembly, and finally the light beam extends in a direction from the flange portion to the connecting portion; The optical axis of the light-emitting component coincides with the axis of the connecting shaft component.

8. The detection device according to claim 7, characterized in that: The detection device further comprises a first light-displaying surface arranged on a side surface of the tool head, wherein the first light-displaying surface is parallel to an axial direction of the tool head.

9. The detection device according to claim 7, characterized in that: The detection device further comprises a baffle plate arranged opposite to the flange portion along the axis direction of the connecting shaft assembly, the baffle plate having a second light-displaying surface facing the flange portion, and the second light-displaying surface is perpendicular to the axis of the connecting shaft assembly; The second light display surface is provided with a display area; After the light beam is emitted from the cavity, the light beam irradiates the display area.

10. The detection device according to claim 9, characterized in that: The display area includes a plurality of concentric circles, and an extension line of the axis of the connecting shaft assembly passes through the centers of the plurality of concentric circles.

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