Filter tip cutting wheel assembly and cigarette equipment

Abstract

The utility model relates to a filter tip cutting wheel assembly and cigarette equipment. The filter tip cutting wheel assembly comprises a drum wheel and an air distribution seat. The drum wheel rotates around the air distribution seat in the working process, and when part of the negative pressure holes corresponding to the wheel groove pass through the first strong negative pressure groove, the filter tip can be rapidly filled into the wheel groove under the action of large negative pressure. After the filter tip is obtained, the wheel groove immediately rotates to enable part of the negative pressure holes to pass through the weak negative pressure groove, so that the negative pressure in the wheel groove is obviously weakened, the negative pressure leaked from the side face is reduced, and the situation that one wheel groove corresponds to two filter tips is avoided. And then, when part of negative pressure holes corresponding to the wheel grooves pass through second strong negative pressure grooves, the filter tips in the wheel grooves are cut, and therefore it is ensured that the filter tips are tightly attached to the drum wheel, and the cutting quality is guaranteed. Therefore, the filter tip cutting wheel assembly can effectively reduce the tip clamping probability.

Description

Technical Field

[0001] The utility model relates to the technical field of tobacco machinery, in particular to a filter tip cutting wheel assembly and a cigarette making device. Background Art

[0002] The filter cutting wheel assembly is used to cut the filter in the cigarette making equipment. The drum surface of the filter cutting wheel assembly is provided with a plurality of wheel grooves extending in the axial direction and cutting grooves extending in the circumferential direction. The filter can enter the wheel grooves in turn and be adsorbed by negative pressure. After the drum rotates to the cutting station, the cutter cuts along the cutting grooves to cut the filter.

[0003] In order to facilitate the smooth entry of the filter into the wheel groove, the diameter of the wheel groove is generally slightly larger than the diameter of the filter. In this way, when a filter has entered and adsorbed in the wheel groove, the gap between it and the filter will cause negative pressure leakage and suction on the side of the wheel groove, and the suction on the side of the wheel groove will easily adsorb the second filter, resulting in one wheel groove corresponding to two filters, which will cause the filter to be stuck and trigger an alarm to cause shutdown. Utility Model Content

[0004] Based on this, it is necessary to provide a filter cutting wheel assembly and cigarette making equipment that can effectively reduce the probability of pinching in order to solve the above problems.

[0005] A filter cutting wheel assembly, comprising:

[0006] A drum wheel, a surface of which is formed with a plurality of wheel grooves extending along the axial direction of the drum wheel and cutting grooves extending along the circumferential direction of the drum wheel and passing through the plurality of wheel grooves, a bottom of each of the wheel grooves is provided with a plurality of negative pressure holes extending to the inner wall of the drum wheel; and

[0007] A valve seat having a negative pressure cavity, wherein the outer wall of the valve seat is formed with a variable negative pressure groove and two constant negative pressure grooves extending in the circumferential direction and communicating with the negative pressure cavity, wherein the two constant negative pressure grooves are distributed on both sides of the variable negative pressure groove, and the variable negative pressure groove is sequentially provided with a first strong negative pressure groove, a weak negative pressure groove and a second strong negative pressure groove which are independent of each other along the circumference of the valve seat, and the flow area between the weak negative pressure groove and the negative pressure cavity is smaller than the flow area between the first strong negative pressure groove and the second strong negative pressure groove and the negative pressure cavity;

[0008] Among them, the drum wheel is rotatably mounted on the valve seat, part of the negative pressure holes in each wheel groove corresponds to the constant negative pressure groove, and another part of the negative pressure holes corresponds to the variable negative pressure groove, and the part of the negative pressure holes corresponding to the variable negative pressure groove can pass through the first strong negative pressure groove, the weak negative pressure groove and the second strong negative pressure groove in sequence.

[0009] In one of the embodiments, a connecting through hole communicating with the negative pressure chamber is formed at the bottom of the weak negative pressure groove, and the filter cutting wheel assembly further comprises a plug that can be detachably inserted into the connecting through hole.

[0010] In one of the embodiments, a plurality of the connecting through holes are provided, and each of the connecting through holes is correspondingly provided with the plug.

[0011] In one of the embodiments, a dust suction chamber connected to the cutting groove is formed in the drum wheel, a dust removal hole extending to the inner wall of the drum wheel is formed at the bottom of the dust suction chamber, an air suction hole connected to the negative pressure chamber is formed on the outer wall of the gas distribution seat, and the air suction hole can pass through the dust removal hole during the rotation of the drum wheel.

[0012] In one of the embodiments, an air suction groove is formed on the outer wall of the gas distribution seat, the air suction hole is located in the air suction groove, and the dust removal hole can pass through the air suction groove during the rotation of the drum wheel.

[0013] In one of the embodiments, each of the cutting grooves is connected to a plurality of the dust suction chambers, and the plurality of the dust suction chambers are arranged at equal intervals along the circumference of the cutting groove.

[0014] In one of the embodiments, in the direction from the cutting groove to the dust removal hole, the size of the dust suction chamber in the circumferential direction of the drum wheel decreases.

[0015] In one embodiment, the drum wheel includes a wheel core and a plurality of wheel bodies sleeved on the wheel core, the plurality of wheel bodies are arranged along the axial direction of the wheel core, and the cutting groove and the dust suction chamber are formed between two adjacent wheel bodies.

[0016] In one of the embodiments, an annular partition is provided on the end surface of each wheel body facing the other wheel body, a groove is formed on the surface of each partition, and the grooves of two opposite partitions cooperate to enclose the dust suction chamber.

[0017] A cigarette making device comprises a filter cutting wheel assembly as described in any one of the above preferred embodiments.

[0018] In the above-mentioned filter cutting wheel assembly and cigarette making equipment, the drum wheel rotates around the gas distribution seat during operation, and when some of the negative pressure holes in the wheel groove pass through the first strong negative pressure groove, the filter can be quickly filled into the wheel groove under the action of a larger negative pressure. After obtaining the filter, the wheel groove is immediately rotated to make some of the negative pressure holes pass through the weak negative pressure groove, thereby significantly weakening the negative pressure in the wheel groove and reducing the negative pressure leaking from the side, thereby avoiding the situation where one wheel groove corresponds to two filters. Next, when some of the negative pressure holes in the wheel groove pass through the second strong negative pressure groove, the filter in the wheel groove is cut, thereby ensuring that the filter is close to the drum wheel to ensure the cutting quality. It can be seen that the above-mentioned filter cutting wheel assembly can effectively reduce the probability of filter pinching. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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 work.

[0020] Figure 1 This is a structural schematic diagram of a filter cutting wheel assembly in a preferred embodiment of the utility model;

[0021] Figure 2 for Figure 1 A longitudinal cross-sectional view of the filter cutting wheel assembly after assembly shown;

[0022] Figure 3 for Figure 1 A cross-sectional view of the filter cutting wheel assembly after assembly, taken transversely along the wheel body;

[0023] Figure 4 for Figure 1 A cross-sectional view of the filter tip cutting wheel assembly after assembly, cut transversely along the partition;

[0024] Figure 5 for Figure 1 The schematic diagram of the structure of the gas distribution seat in the filter cutting wheel assembly shown;

[0025] Figure 6 for Figure 5 The schematic diagram of the structure of the valve seat after being rotated to a specific angle is shown;

[0026] Figure 7 for Figure 5 The cross-sectional view of the valve seat along AA is shown. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model 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 utility model. However, the utility model 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 utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0030] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral 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 the present invention can be understood according to specific circumstances.

[0031] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a 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. A first feature being "below", "below" or "below" a 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.

[0032] It should be noted that when 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. When 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. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0033] See also Figure 1 and Figure 2 The utility model provides a filter cutting wheel assembly 100 and a cigarette making device (not shown). The cigarette making device includes a filter cutting wheel assembly 100. The filter cutting wheel assembly 100 can cooperate with a cutter wheel (not shown) to cut the filter, thereby cutting a longer filter into several shorter filters.

[0034] The filter cutting wheel assembly 100 in the preferred embodiment of the present invention includes a drum wheel 110 and a gas distribution seat 120 .

[0035] The drum wheel 110 is a roughly cylindrical tube-shaped structure with a central hole (not marked) extending along the axial direction. A plurality of wheel grooves 101 are formed on the surface of the drum wheel 110. The wheel grooves 101 extend along the axial direction of the drum wheel 110, and the plurality of wheel grooves 101 are evenly spaced along the circumference of the drum wheel 110. The wheel grooves 101 are used to accommodate the filter to be cut, and their length is generally slightly smaller than the length of the filter. The surface of the drum wheel 110 is also formed with cutting grooves 102 extending along the circumference of the drum wheel 110 and passing through the plurality of wheel grooves 101. The cutting grooves 102 are annular and can avoid the cutter wheel so as to cut off the filter accommodated in the wheel grooves 101. The number of cutting grooves 102 is determined according to the number of sections that the filter needs to be cut. For example, if two cutting grooves 102 are provided in the present embodiment, they can cooperate with two cutter wheels respectively to divide the filter in the wheel groove 101 into three.

[0036] Furthermore, each wheel groove 101 is provided with a negative pressure hole 103 extending to the inner wall of the drum wheel 110 at the bottom. Generally, there are multiple negative pressure holes 103, which are arranged at intervals along the length direction of the wheel groove 101. The inner wall of the drum wheel 110 refers to the inner wall of the center hole of the drum wheel 110, that is, the negative pressure hole 103 connects the corresponding wheel groove 101 with the center hole of the drum wheel 110. The negative pressure hole 103 can be connected with the gas distribution seat 120, so that negative pressure is formed in the corresponding wheel groove 101, thereby adsorbing the filter tip.

[0037] In this embodiment, the drum 110 includes a wheel core 111 and a plurality of wheel bodies 112 sleeved on the wheel core 111. The plurality of wheel bodies 112 are arranged along the axial direction of the wheel core 111, and a cutting groove 102 is formed between two adjacent wheel bodies 112. For example, three wheel bodies 112 are provided, and the gap between two adjacent wheel bodies 112 constitutes the cutting groove 102, so two cutting grooves 102 are formed between the three wheel bodies 112.

[0038] The wheel core 111 is generally cylindrical, and its central hole is the central hole of the drum wheel 110. The wheel body 112 is annular, and a plurality of wheel bodies 112 are concentrically arranged with the wheel core 111 and fixedly connected with the wheel core 111. The wheel groove 101 is formed on the outer wall of the wheel body 112, and the negative pressure hole 103 passes through the wheel body 112 and the wheel core 111.

[0039] The drum wheel 110 can rotate around its own axis, and the gas distribution seat 120 is fixed. Specifically, the gas distribution seat 120 can be fixedly installed on the wall plate of the cigarette making equipment.

[0040] Please also read Figure 3 , Figure 5 and Figure 7 The gas distribution seat 120 has a negative pressure cavity 108, and the negative pressure cavity 108 can be connected to an external negative pressure generator to form a negative pressure. The outer wall of the gas distribution seat 120 is formed with a variable negative pressure groove connected to the negative pressure cavity 108 and two constant negative pressure grooves 125. The variable negative pressure groove is sequentially provided with a first strong negative pressure groove 121, a weak negative pressure groove 122 and a second strong negative pressure groove 123 that are independent of each other along the circumference of the gas distribution seat 120, that is, the first strong negative pressure groove 121, the weak negative pressure groove 122 and the second strong negative pressure groove 123 together constitute the above-mentioned variable negative pressure groove.

[0041] Two constant negative pressure grooves 125 are arranged at intervals along the axial direction of the gas distribution seat 120, and the variable negative pressure groove is located between the two constant negative pressure grooves 125. The first strong negative pressure groove 121, the weak negative pressure groove 122 and the second strong negative pressure groove 123 are arranged in sequence along the circumference of the gas distribution seat 120, and the weak negative pressure groove 122 is located between the first strong negative pressure groove 121 and the second strong negative pressure groove 123. The first strong negative pressure groove 121, the weak negative pressure groove 122, the second strong negative pressure groove 123 and the constant negative pressure groove 125 can be evacuated through the negative pressure chamber 108, thereby forming a negative pressure.

[0042] Furthermore, the flow area between the weak negative pressure groove 122 and the negative pressure chamber 108 is smaller than the flow area between the first strong negative pressure groove 121 and the second strong negative pressure groove 123 and the negative pressure chamber 108. The smaller the flow area, the smaller the gas flow per unit time. Therefore, the negative pressure formed in the weak negative pressure groove 122 is smaller than the negative pressure in the first strong negative pressure groove 121, and also smaller than the negative pressure in the second strong negative pressure groove 123. In other words, in the extension direction of the variable negative pressure groove, the negative pressure in different areas thereof varies. In the extension direction of the constant negative pressure groove 125, the negative pressure remains consistent. Usually, the negative pressure in the constant negative pressure groove 125 is roughly the same as the negative pressure in the first strong negative pressure groove 121 and the second strong negative pressure groove 123.

[0043] The drum wheel 110 is rotatably mounted on the gas distribution seat 120. Specifically, the gas distribution seat 120 is rotatably inserted into the center hole of the drum wheel 110. The outer wall of the gas distribution seat 120 is sealed with the inner wall of the center hole of the drum wheel 110 to prevent air leakage. Part of the negative pressure holes 103 of each wheel groove 101 corresponds to the constant negative pressure groove 125, and the other part of the negative pressure holes 103 corresponds to the variable negative pressure groove, and the part of the negative pressure holes 103 corresponding to the variable negative pressure groove can pass through the first strong negative pressure groove 121, the weak negative pressure groove 122 and the second strong negative pressure groove 123 in sequence.

[0044] During the rotation of the drum 110, when the partial negative pressure holes 103 of the wheel groove 101 corresponding to the variable negative pressure groove pass through the first strong negative pressure groove 121 and the second strong negative pressure groove 123, the wheel groove 101 can be connected with the first strong negative pressure groove 121 and the second strong negative pressure groove 123 through the corresponding negative pressure holes 103. At this time, since the negative pressure in the first strong negative pressure groove 121 and the second strong negative pressure groove 123 is relatively strong, the negative pressure formed by the wheel groove 101 is also relatively strong. When the partial negative pressure holes 103 of the wheel groove 101 pass through the weak negative pressure groove 122, the wheel groove 101 can be connected with the weak negative pressure groove 122 through the corresponding negative pressure holes 103. At this time, since the negative pressure in the weak negative pressure groove 122 is relatively weak, the negative pressure formed by the wheel groove 101 is also relatively weak.

[0045] During this process, some of the negative pressure holes 103 corresponding to the constant negative pressure grooves 125 can always be connected to the negative pressure chamber 108 through the constant negative pressure grooves 125 , so that a certain negative pressure is maintained in the wheel groove 101 .

[0046] By setting the feeding position and the cutting position, the filter can be supplied when the negative pressure hole 103 corresponding to the wheel groove 101 passes through the first strong negative pressure groove 121, so as to ensure that the filter is quickly filled into the wheel groove 101 under the action of a large negative pressure, and the filter in the wheel groove 101 is cut when the negative pressure hole 103 corresponding to the wheel groove 101 passes through the second strong negative pressure groove 123, so as to ensure that the filter is close to the drum wheel 110 to ensure the cutting quality. Moreover, after the wheel groove 101 obtains the filter, as the drum wheel 110 rotates, the negative pressure hole 103 corresponding to it will immediately reach the weak negative pressure groove 122, so that the negative pressure in the wheel groove 101 that obtains the filter is significantly weakened and the negative pressure leaking from the side is reduced, so as to avoid the situation where one wheel groove 101 corresponds to two filters.

[0047] In this embodiment, a connecting through hole 104 communicating with the negative pressure chamber 108 is provided at the bottom of the weak negative pressure groove 122, and the filter cutting wheel assembly 100 further includes a plug 130 that can be detachably inserted into the connecting through hole 104. Normally, the plug 130 is pulled out from the connecting through hole 104, and the weak negative pressure groove 122 is connected to the negative pressure chamber 108 through the connecting through hole 104 and forms a negative pressure. In the actual production process, if it is found that there is still a situation where one wheel groove 101 corresponds to two filter tips, it means that the negative pressure of the wheel groove 101 is still too large after the filter tip is obtained. At this time, the plug 130 can be inserted into the connecting through hole 104, and the weak negative pressure groove 122 is connected to the negative pressure chamber 108 only through the gap between the hole wall of the connecting through hole 104 and the plug 130, and the negative pressure in the weak negative pressure groove 122 is significantly reduced. Therefore, when the negative pressure hole 103 corresponding to the wheel groove 101 passes through the weak negative pressure groove 122, the negative pressure in the wheel groove 101 will also be significantly reduced.

[0048] Furthermore, in this embodiment, a plurality of connecting through holes 104 are provided, and each connecting through hole 104 is correspondingly provided with a plug 130. By controlling the number of plugs 130 inserted, the flow area between the weak negative pressure groove 122 and the negative pressure cavity 108 can be flexibly adjusted, so that the negative pressure hole 103 in the wheel groove 101 can be flexibly adjusted, that is, it can be avoided that the negative pressure is too small to effectively adsorb the filter tip, and it can be avoided that the negative pressure is too large to cause the wheel groove 101 that has obtained the filter tip to continue to adsorb the second filter tip.

[0049] Please also read Figure 4 and Figure 6 In the present embodiment, a dust suction chamber 107 connected with the cutting groove 102 is formed in the drum wheel 110, a dust removal hole 105 extending to the inner wall of the drum wheel 110 is formed at the bottom of the dust suction chamber 107, and an air suction hole 106 connected with the negative pressure chamber 108 is formed on the outer wall of the gas distribution seat 120, and the dust removal hole 105 can pass through the air suction hole 106 during the rotation of the drum wheel 110.

[0050] When the dust removal hole 105 passes through the air suction hole 106, the dust suction chamber 107 is connected with the air suction hole 106 through the dust removal hole 105 and forms a negative pressure. Therefore, the dust generated by cutting in the cutting groove 102 can be sucked away through the dust suction chamber 107, the dust removal hole 105, the air suction hole 106 and the negative pressure chamber 108 in sequence, effectively avoiding the clogging of the cutting groove 102 after long-term use, thereby ensuring the slitting quality.

[0051] Furthermore, in this embodiment, an air suction groove 124 is formed on the outer wall of the air distribution seat 120, and the air suction hole 106 is located in the air suction groove 124. The dust removal hole 105 can pass through the air suction groove 124 during the rotation of the drum wheel 110. The area of ​​the air suction groove 124 is relatively large, and the dust removal hole 105 can be connected with the air suction hole 106 through the air suction groove 124 when passing through the air suction groove 124, so as to ensure that a stable negative pressure is formed in the dust collection chamber 107.

[0052] In addition, in this embodiment, each cutting groove 102 is connected to a plurality of dust suction chambers 107, and the plurality of dust suction chambers 107 are arranged at equal intervals along the circumference of the cutting groove 102. It can be seen that the plurality of dust suction chambers 107 can be provided to suction dust from multiple locations along the circumference of the cutting groove 102, thereby improving the cleaning effect of the cutting groove 102.

[0053] In this embodiment, in the direction from the cutting groove 102 to the dust removal hole 105, the size of the dust suction chamber 107 in the circumferential direction of the drum wheel 110 decreases. In other words, the size of the dust suction chamber 107 near the cutting groove 102 is larger, and the size of the dust suction chamber 107 near the dust removal hole 105 is smaller, and the dust suction chamber 107 is roughly fan-shaped or inverted triangle-shaped. In this way, it can ensure that the negative pressure in the dust suction chamber 107 is concentrated at the cutting groove 102, thereby facilitating the smooth suction of dust in the cutting groove 102.

[0054] The dust suction chamber 107 can be formed in the drum wheel 110 by milling grooves or the like. In addition, the dust suction chamber 107 can also be formed between two adjacent wheel bodies 112. Figure 1 In this embodiment, each wheel body 112 is provided with an annular partition 113 on the end surface facing the other wheel body 112, and a groove 1131 is formed on the surface of each partition 113, and the grooves 1131 of the two opposite partitions 113 cooperate to form a dust suction chamber 107. In this way, the dust suction chamber 107 is simple to shape and easy to process.

[0055] In the above-mentioned filter cutting wheel assembly 100 and cigarette making equipment, the drum wheel 110 rotates around the gas distribution seat 120 during operation, so that the negative pressure holes 103 corresponding to the variable negative pressure groove of each wheel groove 101 can pass through the first strong negative pressure groove 121, the weak negative pressure groove 122 and the second strong negative pressure groove 123 in sequence. When some of the negative pressure holes 103 of the wheel groove 101 pass through the first strong negative pressure groove 121, the filter is quickly filled into the wheel groove 101 under the action of a large negative pressure. When the wheel groove 101 of the filter is immediately rotated to the point where some of the negative pressure holes 103 pass through the weak negative pressure groove 122, the negative pressure in the wheel groove 101 is significantly weakened and the negative pressure leaking from the side is reduced, thereby avoiding the situation where one wheel groove 101 corresponds to two filters. Then, when some of the negative pressure holes 103 of the wheel groove 101 pass through the second strong negative pressure groove 123, the filter in the wheel groove 101 is cut, thereby ensuring that the filter is close to the drum wheel 110 to ensure the cutting quality. It can be seen that the filter cutting wheel assembly 100 can effectively reduce the probability of filter pinching.

[0056] 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.

[0057] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A filter cutting wheel assembly, characterized in that: include: A drum wheel, a surface of which is formed with a plurality of wheel grooves extending along the axial direction of the drum wheel and cutting grooves extending along the circumferential direction of the drum wheel and passing through the plurality of wheel grooves, a bottom of each of the wheel grooves is provided with a plurality of negative pressure holes extending to the inner wall of the drum wheel; and A valve seat having a negative pressure cavity, wherein the outer wall of the valve seat is formed with a variable negative pressure groove and two constant negative pressure grooves extending in the circumferential direction and communicating with the negative pressure cavity, wherein the two constant negative pressure grooves are distributed on both sides of the variable negative pressure groove, and the variable negative pressure groove is sequentially provided with a first strong negative pressure groove, a weak negative pressure groove and a second strong negative pressure groove which are independent of each other along the circumference of the valve seat, and the flow area between the weak negative pressure groove and the negative pressure cavity is smaller than the flow area between the first strong negative pressure groove and the second strong negative pressure groove and the negative pressure cavity; Among them, the drum wheel is rotatably mounted on the valve seat, part of the negative pressure holes in each wheel groove corresponds to the constant negative pressure groove, and another part of the negative pressure holes corresponds to the variable negative pressure groove, and the part of the negative pressure holes corresponding to the variable negative pressure groove can pass through the first strong negative pressure groove, the weak negative pressure groove and the second strong negative pressure groove in sequence.

2. The filter cutting wheel assembly according to claim 1, characterized in that: A connecting through hole communicating with the negative pressure chamber is formed at the bottom of the weak negative pressure groove, and the filter cutting wheel assembly further comprises a plug which can be detachably inserted into the connecting through hole.

3. The filter cutting wheel assembly according to claim 2, characterized in that: There are a plurality of connecting through holes, and each of the connecting through holes is correspondingly provided with the plug.

4. The filter cutting wheel assembly according to claim 1, characterized in that: A dust suction chamber connected with the cutting groove is formed in the drum wheel, a dust removal hole extending to the inner wall of the drum wheel is formed at the bottom of the dust suction chamber, an air suction hole connected with the negative pressure chamber is formed on the outer wall of the gas distribution seat, and the air suction hole can pass through the dust removal hole during the rotation of the drum wheel.

5. The filter cutting wheel assembly according to claim 4, characterized in that: An air suction groove is formed on the outer wall of the gas distribution seat, the air suction hole is located in the air suction groove, and the dust removal hole can pass through the air suction groove during the rotation of the drum wheel.

6. The filter cutting wheel assembly according to claim 4, characterized in that: Each of the cutting grooves is communicated with a plurality of the dust suction chambers, and the plurality of dust suction chambers are arranged at equal intervals along the circumference of the cutting groove.

7. The filter cutting wheel assembly according to claim 4, characterized in that: In the direction from the cutting groove to the dust removal hole, the size of the dust suction chamber in the circumferential direction of the drum wheel decreases.

8. The filter cutting wheel assembly according to claim 4, characterized in that: The drum wheel comprises a wheel core and a plurality of wheel bodies sleeved on the wheel core. The plurality of wheel bodies are arranged along the axial direction of the wheel core, and the cutting groove and the dust suction cavity are formed between two adjacent wheel bodies.

9. The filter cutting wheel assembly according to claim 8, characterized in that: An annular partition is arranged on the end surface of each wheel body facing the other wheel body, a groove is formed on the surface of each partition, and the grooves of two opposite partitions cooperate to enclose the dust suction chamber.

10. A cigarette making device, characterized in that: A filter cutting wheel assembly comprising the filter cutting wheel assembly as claimed in any one of claims 1 to 9.

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