Combined adjustable cutter shaft isolation sleeve and cutting device

Abstract

The utility model relates to the technical field of aluminum processing equipment, and discloses a combined adjustable cutter shaft spacer sleeve and a cutting device, which comprise a fixed lantern ring, a first adjusting lantern ring and a second adjusting lantern ring, and the first adjusting lantern ring and the second adjusting lantern ring are both rotatably connected to the fixed lantern ring. A size adjusting part is arranged between the opposite end faces of the first adjusting lantern ring and the second adjusting lantern ring, and when the first adjusting lantern ring and the second adjusting lantern ring rotate relatively, the first adjusting lantern ring, the size adjusting part and the second adjusting lantern ring are combined into multiple sets of axial size values in the axial direction of the fixing lantern ring. According to the utility model, the first adjusting lantern ring and the second adjusting lantern ring are rotationally arranged on the fixed lantern ring, and the size adjusting part is arranged, so that the first adjusting lantern ring, the size adjusting part and the second adjusting lantern ring are combined into a plurality of groups of axial size values in the axial direction of the fixed lantern ring; the problem that in the prior art, an isolation sleeve cannot conveniently adjust end face jumping of a cutting disc is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of aluminum processing equipment, in particular to a combined adjustable cutter shaft spacer and a cutting device. Background Technique

[0002] During the fine processing of aluminum sheets and strips, it is necessary to cut the coils into multiple aluminum strips with a certain width according to customer requirements. At present, the slitting work is mainly completed by slitting equipment. The slitting part of the slitting equipment mainly includes a slitting cutter shaft and a plurality of circular knives fixedly connected to the slitting cutter shaft. A spacer is arranged between adjacent circular knives. The spacer is fixed on the slitting cutter shaft, and the distance between adjacent circular knives is controlled by the spacer, so as to control the width of the slit aluminum strip.

[0003] During the slitting process, due to the machining errors of the circular knives and the spacers, or the assembly errors generated during the assembly process of the circular knives and the spacers, or the deformation of the cutter shaft due to force during use, etc., the end face of the circular knife will have excessive runout, affecting the quality of aluminum strip slitting. In the prior art, the structure of the spacer is disc-shaped, its structure is fixed and the thickness cannot be adjusted, making it very difficult to adjust the end face runout of the circular knife. Therefore, it is necessary to improve the structure of the spacer in the prior art so as to adjust the end face runout of the circular knife. Content of the Utility Model

[0004] The utility model aims to provide a combined adjustable cutter shaft spacer and a cutting device to solve the problem that the spacer in the prior art cannot conveniently adjust the end face runout of the circular knife.

[0005] To solve the above problems, the utility model adopts the following technical scheme: A combined adjustable cutter shaft spacer includes a fixed collar, a first adjusting collar and a second adjusting collar. The first adjusting collar and the second adjusting collar are both rotatably connected to the fixed collar, and a dimension adjusting part is arranged between the end faces of the first adjusting collar and the second adjusting collar facing each other. When the first adjusting collar and the second adjusting collar rotate relative to each other, the first adjusting collar, the dimension adjusting part and the second adjusting collar form multiple sets of axial dimension values in the axial direction of the fixed collar.

[0006] The principle of this solution is as follows: In this application, the fixed collar is used to fix to the tool shaft in the prior art. The first adjusting collar and the second adjusting collar are both rotatably connected to the fixed collar, and the first adjusting collar and the second adjusting collar are arranged adjacent to each other along the axial direction of the fixed collar. One side of the first adjusting collar away from the second adjusting collar protrudes beyond one side of the fixed collar, while one side of the second adjusting collar away from the first adjusting collar protrudes beyond the other side of the fixed collar. As a result, the width of the combination of the first adjusting collar and the second adjusting collar in the axial direction of the fixed collar is greater than the thickness of the fixed collar, so that the side surface of the first adjusting collar protruding beyond one side of the fixed collar can contact the side surface of the disc cutter in the prior art, and the side surface of the second adjusting collar protruding beyond the other side of the fixed collar can contact the side surface of another adjacent disc cutter.

[0007] During the actual use process, since a dimension adjusting part is provided between the end faces of the first adjusting collar and the second adjusting collar facing each other, by rotating the first adjusting collar and the second adjusting collar, the first adjusting collar and the second adjusting collar rotate relative to each other. Finally, the first adjusting collar, the dimension adjusting part, and the second adjusting collar are combined into multiple sets of axial dimension values with different sizes in the axial direction of the fixed collar. During the actual use process, according to the end face runout situation of the disc cutter, it is adjusted to an appropriate axial dimension value, so as to conveniently and stably adjust the end face runout of the disc cutter.

[0008] The beneficial effects of the present utility model are as follows:

[0009] 1. It can conveniently adjust the end face runout of the disc cutter: Compared with the spacer sleeve in the prior art that cannot adjust the end face runout of the disc cutter, resulting in poor quality of aluminum strip slitting. In this application, by setting the spacer sleeve structure as the first adjusting collar and the second adjusting collar that can rotate relative to the fixed collar, during the use process, by rotating the first adjusting collar and the second adjusting collar, relying on the dimension adjusting part provided between the two, the axial width dimension of the entire spacer sleeve can be conveniently adjusted, so as to achieve the purpose of adjusting the end face runout of the disc cutter. The structure is simple and the operation is convenient.

[0010] 2. The adjustment range of the disc cutter end face adjustment is wide: In this application, when the first adjusting collar and the second adjusting collar rotate relative to each other, relying on the set dimension adjusting part, the first adjusting collar, the dimension adjusting part, and the second adjusting collar are combined to form multiple sets of axial dimension values, realizing the setting of multiple axial dimensions. Therefore, when adjusting the end face runout of the disc cutter, it is possible to select an appropriate axial dimension value corresponding to the size of the end face runout of the disc cutter, which can not only achieve more accurate adjustment, but also achieve the adjustment of multiple dimension values, and the adjustment range is wide.

[0011] 3. It can provide stable support for the end face of the disc cutter: In this application, the size adjustment part is arranged between the two opposite end faces of the first adjustment collar and the second adjustment collar. Therefore, the end face of the first adjustment collar protruding beyond one side of the fixed collar and the end face of the second adjustment collar protruding beyond the other side of the fixed collar can be set to be planar, so that when contacting the corresponding end face of the disc cutter, it is a surface contact, which can play a stable supporting role for the end face of the disc cutter, effectively improving the stability of the end face of the disc cutter, and thus improving the quality of aluminum strip slitting.

[0012] Preferably, as an improvement, the size adjustment part includes an adjustment inclined plane arranged between the first adjustment collar and the second adjustment collar, and the adjustment inclined plane forms an angle with the radial plane of the fixed collar.

[0013] In this solution, the size adjustment part is set as two adjustment inclined planes respectively arranged on the first adjustment collar and the second adjustment collar. The adjustment inclined plane forms an angle with the radial plane of the fixed collar, that is, the adjustment inclined plane is inclined relative to the radial plane of the fixed collar. Thus, when rotating the first adjustment collar and the second adjustment collar, as long as there is a relative rotation between the first adjustment collar and the second adjustment collar, a combined support structure with different axial dimension values can be formed by the first adjustment collar and the second adjustment collar in the axial direction of the fixed collar, which can adjust the end face runout of the disc cutter of different sizes. The structure of the adjustment inclined plane is very simple and the adjustment process is convenient and smooth.

[0014] Certainly, when setting the size adjustment part, a stepped end face can be set on the opposite end faces of the first adjustment collar and the second adjustment collar. The sizes of different stepped end faces are different in the axial direction of the fixed collar. When the first adjustment collar and the second adjustment collar rotate relatively, different axial dimension values can be formed by the cooperation of different stepped end faces between the first adjustment collar and the second adjustment collar, and the end face runout of the disc cutter can also be adjusted. Moreover, in the form of setting the stepped end face in this solution, since the contact surface between the first adjustment collar and the second adjustment collar is a surface contact, it can transmit the axial force better than the above-mentioned form of setting the adjustment inclined plane and is more stable in use. However, in the form of the above-mentioned adjustment inclined plane, the adjustment inclined plane can automatically play a guiding role during the adjustment process, making the adjustment process smoother and more convenient.

[0015] Preferably, as an improvement, the difference in the axial dimension values between adjacent axial dimension values along the axial direction of the fixed collar is 0.025 mm.

[0016] In this solution, the dimensional difference of adjacent axial dimension values along the axis of the fixed collar is set to 0.025 mm. Thus, when adjusting a set of axial dimension values, the combined dimension value of the first adjusting collar, the dimension adjusting part, and the second adjusting collar along the axis of the fixed collar can be increased or decreased by 0.025 mm, so as to adjust the end face runout of the disc cutter step by step and accurately.

[0017] Preferably, as an improvement, the number of groups of the axial dimension values is 3 - 5 groups.

[0018] In this solution, the number of groups of the axial dimension values is set to 3 - 5 groups, so that the dimension adjustment range of the spacer sleeve is between 0.050 - 0.100 mm, and the end face runout of the disc cutter can be accurately adjusted.

[0019] Preferably, as an improvement, a limiting mechanism for preventing the first adjusting collar and the second adjusting collar from sliding out of the fixed collar along the axis of the fixed collar is provided on the fixed collar.

[0020] In this solution, the first adjusting collar and the second adjusting collar are limited by the limiting mechanism to prevent the first adjusting collar and the second adjusting collar from falling out of the fixed collar. Thus, after the first adjusting collar and the second adjusting collar are installed on the fixed collar, their relative positions will no longer change, and only the first adjusting collar and the second adjusting collar can be rotated to adjust to different axial dimension values, making the adjustment process more stable.

[0021] Preferably, as an improvement, the limiting mechanism includes a limiting protrusion and a limiting snap ring. The limiting protrusion is fixedly connected to one side of the fixed collar, and the limiting snap ring is detachably connected to the other side of the fixed collar. A limiting space for the first adjusting collar and the second adjusting collar to move along the axis of the fixed collar is formed between the limiting protrusion and the limiting snap ring.

[0022] In this solution, the limiting snap ring is detachably connected to one side of the fixed collar. When installing the first adjusting collar and the second adjusting collar, first remove the limiting snap ring from the fixed collar, then set the first adjusting collar and the second adjusting collar on the fixed collar, and then fix the limiting snap ring on the fixed collar. Then, the first adjusting collar and the second adjusting collar can be limited by the limiting protrusion and the limiting snap ring. The installation of the first adjusting collar and the second adjusting collar is convenient, the overall structure is simple, and the limiting is stable.

[0023] Preferably, as an improvement, first relief grooves are formed on one side of each end face of the first adjusting collar close to the fixed collar, and second relief grooves are formed on one side of each end face of the second adjusting collar close to the fixed collar.

[0024] In this solution, by providing a first relief groove and a second relief groove, the contact area between the first adjusting collar and the second adjusting collar is reduced, and the contact surfaces between the first adjusting collar and the end face of the disc cutter as well as between the second adjusting collar and the disc cutter are relatively reduced, so that it is more labor-saving and convenient to rotate and adjust the first adjusting collar and the second adjusting collar.

[0025] Preferably, as an improvement, a clamping fit groove for cooperating with the limit snap ring is provided on the first adjusting collar, and a protrusion fit groove for cooperating with the limit protrusion is provided on the second adjusting collar.

[0026] In this solution, by providing the clamping fit groove and the protrusion fit groove, it is avoided that the limit snap ring and the limit protrusion block the relative rotation of the first adjusting collar and the second adjusting collar with respect to the fixed collar, making the rotational adjustment of the first adjusting collar and the second adjusting collar smoother.

[0027] Preferably, as an improvement, a plurality of first size marks are provided on the outer wall of the first adjusting collar along the circumferential direction of the first adjusting collar, and a plurality of second size marks equal in number to the first size marks are provided on the outer wall of the second adjusting collar along the circumferential direction of the second adjusting collar. When the first adjusting collar rotates relative to the second adjusting collar, when one of the first size marks and one of the second size marks rotate to be paired, the first adjusting collar, the size adjusting part and the second adjusting collar are combined into one of the axial dimension values in the axial direction of the fixed collar.

[0028] In this solution, by providing a plurality of first size marks and a plurality of second size marks, when rotating the first adjusting collar and the second adjusting collar, each first size mark can be made to be directly opposite and cooperate with only one of the second size marks, and when one of the first size marks is directly opposite and cooperates with different second size marks, it means that the first adjusting collar and the second adjusting collar rotate to different cooperation states. Therefore, a pairing table can be preset, so that the axial dimension values corresponding to the cooperation of one of the first size marks and different second size marks. The user can quickly and accurately determine the corresponding axial dimension value at this time relying on the pairing table and the direct opposite cooperation of the first size marks and the second size marks, or can quickly rotate the first adjusting collar and the second adjusting collar according to the pairing table when the axial dimension value to be adjusted is determined, and complete the adjustment process quickly and accurately.

[0029] A cutting device includes a cutter shaft and a plurality of disc cutters arranged on the cutter shaft. The above-mentioned combined adjustable cutter shaft spacer is connected between adjacent disc cutters, and the fixed collar is fixedly connected to the cutter shaft.

[0030] In this solution, by setting the described combined adjustable cutter shaft spacer between adjacent disc cutters, the fixed collar is fixedly connected to the cutter shaft. When it is necessary to adjust the end face runout of the disc cutter, only by rotating the first adjusting collar and the second adjusting collar, the first adjusting collar, the size adjusting part and the second adjusting collar can be combined into axial dimension values of different sizes, so as to adjust the end face runout of the disc cutter and achieve a better aluminum strip slitting effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the first embodiment of the present utility model.

[0032] Figure 2 is Figure 1 front sectional view of.

[0033] Figure 3 It is a schematic diagram of the first adjusting collar in the first embodiment of the present utility model.

[0034] Figure 4 It is a schematic diagram of the first adjusting collar vertically arranged in the first embodiment of the present utility model.

[0035] Figure 5 It is a schematic diagram of a cutting device in the first embodiment of the present utility model.

[0036] Figure 6 It is a cross-sectional view of the connection of the fixed collar, the first adjusting collar and the second adjusting collar in the second embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0037] The following is a further detailed description through specific embodiments:

[0038] The reference numerals in the accompanying drawings of the specification include: fixed collar 1, limit protrusion 101, card slot 102, first adjusting collar 2, first avoidance groove 201, adjusting inclined surface 202, distal end 2021, proximal end 2022, clamping and mating groove 203, second adjusting collar 3, second avoidance groove 301, protrusion mating groove 302, cutter shaft 4, disc cutter 5.

[0039] Embodiment 1

[0040] As shown in the attached Figure 1 and Figure 2 : A combined adjustable cutter shaft spacer includes a fixed collar 1, a first adjusting collar 2 and a second adjusting collar 3, wherein the first adjusting collar 2 and the second adjusting collar 3 are both rotatably connected to the fixed collar 1, the first adjusting collar 2 and the second adjusting collar 3 are arranged adjacent to each other along the axial direction of the fixed collar 1, and the outer diameters of the first adjusting collar 2 and the second adjusting collar 3 are equal. The left side of the first adjusting collar 2 protrudes beyond the left side of the fixed collar 1, and the right side of the second adjusting collar 3 protrudes beyond the right side of the fixed collar 1.

[0041] Combined with Figure 1 and Figure 2 , a dimension adjusting portion is provided between the end faces of the first adjusting collar 2 and the second adjusting collar 3 that are in contact with each other face to face. When the first adjusting collar 2 rotates relative to the second adjusting collar 3, the first adjusting collar 2, the dimension adjusting portion, and the second adjusting collar 3 can be combined into multiple sets of axial dimension values with different sizes in the axial direction of the fixed collar 1. Specifically, combined with Figure 4 , the dimension adjusting portion in this embodiment includes adjusting inclined surfaces 202 integrally formed on the first adjusting collar 2 and the second adjusting collar 3, that is, the aforementioned adjusting inclined surfaces 202 are provided on the right end face of the first adjusting collar 2 and the left end face of the second adjusting collar 3. The adjusting inclined surfaces 202 form an angle with the radial plane of the fixed collar 1, that is, the adjusting inclined surfaces 202 are inclined relative to the radial plane of the first adjusting collar 2 or the second adjusting collar 3 (in order to highlight the adjusting inclined surfaces 202, Figure 4 the inclination angle of the adjusting inclined surfaces 202 in is increased, and the actual setting angle is not shown here).

[0042] Combined with Figure 3 and Figure 4 , taking the first adjusting collar 2 as an example, the left end face of the first adjusting collar 2 is arranged parallel to its own radial plane, while the right end face of the first adjusting collar 2 is an inclined adjusting inclined surface 202. The adjusting inclined surface 202 has a distal end 2021 protruding to the right and a proximal end 2022 concave into the first adjusting collar 2. By relying on the contact and cooperation of the distal end 2021 with different positions of the adjusting inclined surface 202 on the second adjusting collar 3, the first adjusting collar 2 and the second adjusting collar 3 can be combined to have different axial dimension values in the axial direction of the fixed collar 1. In this embodiment, combined with the adjustment dimension of the end face runout of the disc cutter 5, the difference between the axial dimension values along the axial direction of the fixed collar 1 between adjacent axial dimension values is 0.025 mm, and the number of groups of axial dimension values is set to 3 - 5 groups, so that the adjustment range of the axial dimension values is between 0.050 - 0.100 mm (two-way adjustment). Preferably, the number of groups of axial dimension values in this embodiment is five groups. Of course, in other embodiments other than this embodiment, the difference between the axial dimension values can be set to 0.050 mm or other values according to the specifications of the disc cutter 5, and the number of groups of axial dimension values can also be set to other numbers according to the actual situation, which will not be elaborated here.

[0043] Combined with Figure 2 and Figure 5, A cutting device, including a tool shaft 4 and a plurality of disc cutters 5 axially arranged on the tool shaft 4 along the axial direction of the tool shaft 4. An above-mentioned combined adjustable tool shaft spacer sleeve is arranged between adjacent disc cutters 5. Among them, the fixed collar 1 is fixedly connected to the tool shaft 4 through a flat key. The left side of the first adjusting collar 2 is in contact with the right end face of one of the disc cutters 5, and the right side of the second adjusting collar 3 is in contact with the left end face of another disc cutter 5, so that the left end face and the right end face of the disc cutter 5 can be tightly fixed by the left and right combined adjustable tool shaft spacer sleeves 4.

[0044] In this embodiment, when it is necessary to adjust the end face runout of the disc cutter 5, first cancel the locking pressure on the tool shaft 4 in the prior art, so that the tightening force between the disc cutter 5 and the spacer sleeve disappears. Then rotate the first adjusting collar 2 and the second adjusting collar 3, rotate the first adjusting collar 2 and the second adjusting collar 3 to be combined into the required axial dimension value, and then rotate the first adjusting collar 2 and the second adjusting collar 3 simultaneously, so that the adjusted axial dimension value rotates to the end face runout position of the disc cutter 5. Finally, fix it with the locking pressure to adjust the end face runout of the disc cutter 5.

[0045] Combined with Figure 2 and Figure 3 As shown in the figure, in order to facilitate the rotational adjustment of the first adjusting collar 2 and the second adjusting collar 3, in this embodiment, first avoidance grooves 201 are opened on one side of the left and right end faces of the first adjusting collar 2 close to the fixed ring, and second avoidance grooves 301 are opened on one side of the left and right end faces of the second adjusting collar 3 close to the fixed collar 1, so that the contact area between the first adjusting collar 2 and the second adjusting collar 3 is smaller, and the adjustment is more convenient and labor-saving.

[0046] Combined with Figure 2 and Figure 5 , in order to adjust the first adjusting collar 2 and the second adjusting collar 3 more conveniently, clearly and accurately, in this embodiment, a plurality of first dimension marks are arranged on the outer wall of the first adjusting collar 2 along the circumferential direction of the first adjusting collar 2, and a plurality of second dimension marks with the same number as the first dimension marks are arranged on the outer wall of the second adjusting collar 3 along the circumferential direction of the second adjusting collar 3. When the first adjusting collar 2 rotates relative to the second adjusting collar 3, when one of the first dimension marks is rotated to be paired with one of the second dimension marks, the first adjusting collar 2, the dimension adjusting part and the second adjusting collar 3 are combined into one of the axial dimension values in the axial direction of the fixed collar 1. Specifically, the first dimension marks are digital serial numbers of 1, 2, 3..., 7, 8, and the second dimension marks are also digital serial numbers of 1, 2, 3..., 7, 8.

[0047]

[0048] Dimension matching table

[0049] In this embodiment, by providing a first size identifier on the outer wall of the first adjusting collar 2 and a second size identifier on the outer wall of the second adjusting collar 3, during use, when the first adjusting collar 2 and the second adjusting collar 3 rotate relative to each other, the pairing of the numerical serial numbers of the first size identifier and the second size identifier will change. According to the different pairing situations of the two, the above-mentioned size pairing table is set up so that the user can quickly rotate and adjust the first adjusting collar 2 and the second adjusting collar 3 according to the situations in the size pairing table during use.

[0050] For example, according to the above-mentioned size pairing table, when "1" on the first adjusting collar 2 is paired with "8" on the second adjusting collar 3 (for the convenience of representation, it is represented by "1-8"), the pairing situations of the remaining first size identifiers on the first adjusting collar 2 and the remaining second size identifiers on the second adjusting collar 3 are: "2-1", "3-2", "4-3", "5-4", "6-5", "7-6", "8-3", and the combined axial dimension values are 50.025, 49.975, 49.975, 49.975, 49.975, 50.025, 50.025, 50.025 in sequence. At this time, the maximum axial dimension value formed by the first adjusting collar 2 and the second adjusting collar 3 is 50.025, that is, after rotating the second adjusting collar 3 by 45°, the axial dimension value increases by 0.025 mm. And so on, by controlling the rotation angles of the first adjusting collar 2 and the second adjusting collar 3, the axial dimension value can be adjusted within the range of 49.900 - 50.100 mm, and according to the size pairing table, it can be clearly and accurately seen which first size identifier and second size identifier form the largest axial dimension value, and then rotate the first adjusting collar 2 and the second adjusting collar 3 simultaneously to rotate the identifier corresponding to the maximum axial dimension value to the position of the end face runout of the disc cutter 5, so as to adjust the end face runout of the disc cutter 5 more precisely.

[0051] Embodiment 2

[0052] The difference between Embodiment 2 and Embodiment 1 is that as Figure 6As shown in the figure, in this embodiment, a limiting mechanism is provided on the fixed collar 1 to prevent the first adjusting collar 2 and the second adjusting collar 3 from sliding out of the fixed collar 1 along the axial direction of the fixed collar 1. Specifically, the limiting mechanism includes a limiting protrusion 101 and a limiting snap ring. A clamping groove 102 is integrally formed on the outer wall of the left side of the fixed collar 1. The limiting snap ring is detachably connected to the clamping groove 102. The limiting protrusion 101 is integrally formed on the outer wall of the right side of the fixed collar 1. A limiting space for the first adjusting collar 2 and the second adjusting collar 3 to move axially along the fixed collar 1 is formed between the limiting protrusion 101 and the limiting snap ring. In addition, in order to avoid the influence of the limiting protrusion 101 and the limiting snap ring on the rotation of the first adjusting collar 2 and the second adjusting collar 3, a clamping and mating groove 203 that mates with the limiting snap ring is integrally formed on the first adjusting collar 2, and a protrusion mating groove 302 that mates with the limiting protrusion 101 is integrally formed on the second adjusting collar 3.

[0053] In this embodiment, when installing the first adjusting collar 2 and the second adjusting collar 3 onto the fixed collar 1, first remove the limiting snap ring from the clamping groove 102, then sequentially sleeved the second adjusting collar 3 and the first adjusting collar 2 onto the fixed collar 1, and then snap the limiting snap ring into the clamping groove 102. In this way, the first adjusting collar 2 and the second adjusting collar 3 can be limited by the limiting snap ring and the limiting protrusion 101, avoiding the first adjusting collar 2 and the second adjusting collar 3 falling out of the fixed collar 1 during the process of adjusting the axial dimension value, making the adjustment more convenient and stable.

[0054] The above are only the embodiments of the present invention. Specific technical solutions and / or common knowledge such as characteristics that are well known in the art are not described in detail here. It should be noted that for those skilled in the art, without departing from the technical solution of the present invention, several deformations and improvements can still be made, and these should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicability of the patent. The protection scope required by this application should be based on the content of its claims, and the specific implementation manners described in the specification can be used to interpret the content of the claims.

Claims

1. A combined adjustable knife shaft isolation sleeve, characterized in that: It includes a fixed collar, a first adjusting collar and a second adjusting collar. The first adjusting collar and the second adjusting collar are both rotatably connected to the fixed collar, and a size adjustment portion is provided between the end faces facing each other of the first adjusting collar and the second adjusting collar. When the first adjusting collar and the second adjusting collar rotate relatively, the first adjusting collar, the size adjustment portion and the second adjusting collar are combined into multiple groups of axial size values ​​in the axial direction of the fixed collar.

2. The combined adjustable knife shaft isolation sleeve according to claim 1, characterized in that: The size adjustment portion comprises an adjustment bevel arranged between the first adjustment collar and the second adjustment collar, and the adjustment bevel and the radial plane of the fixing collar form an angle with each other.

3. The combined adjustable knife shaft isolation sleeve according to claim 1, characterized in that: The difference between adjacent axial dimension values ​​along the axial direction of the fixing collar is 0.025 mm.

4. The combined adjustable knife shaft spacer sleeve according to claim 3 is characterized in that: The number of groups of axial dimension values ​​is 3-5 groups.

5. The combined adjustable knife shaft isolation sleeve according to claim 1, characterized in that: The fixing collar is provided with a limiting mechanism for preventing the first adjusting collar and the second adjusting collar from sliding out of the fixing collar along the axial direction of the fixing collar.

6. The combined adjustable knife shaft spacer sleeve according to claim 5, characterized in that: The limiting mechanism includes a limiting protrusion and a limiting snap ring. The limiting protrusion is fixedly connected to one side of the fixing ring, and the limiting snap ring is detachably connected to the other side of the fixing ring. A limiting space is formed between the limiting protrusion and the limiting snap ring for the first adjusting ring and the second adjusting ring to move axially along the fixing ring.

7. The combined adjustable knife shaft isolation sleeve according to claim 1, characterized in that: A first avoidance groove is formed on one side of the two end surfaces of the first adjusting collar close to the fixed collar, and a second avoidance groove is formed on one side of the two end surfaces of the second adjusting collar close to the fixed collar.

8. The combined adjustable knife shaft spacer sleeve according to claim 6, characterized in that: The first adjusting collar is provided with a snap-fitting groove matched with the limiting snap ring, and the second adjusting collar is provided with a protrusion matching groove matched with the limiting protrusion.

9. The combined adjustable knife shaft isolation sleeve according to claim 1, characterized in that: A plurality of first size markings are provided on the outer wall of the first adjusting collar along the circumference of the first adjusting collar, and a number of second size markings equal to the number of the first size markings are provided on the outer wall of the second adjusting collar along the circumference of the second adjusting collar. When the first adjusting collar rotates relative to the second adjusting collar, when one of the first size markings rotates to match with one of the second size markings, the first adjusting collar, the size adjustment portion and the second adjusting collar are combined into one of the axial size values ​​in the axial direction of the fixed collar.

10. A cutting device, comprising a knife shaft and a plurality of disc knives arranged on the knife shaft, characterized in that: A combined adjustable cutter shaft isolation sleeve as described in any one of claims 1 to 9 is connected between adjacent disc cutters, and the fixed sleeve ring is fixedly connected to the cutter shaft.

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