Low-resistance long-acting filter cartridge dust removal device
By introducing structures such as limiting strips, wedge blocks, and unlocking modules into the filter cartridge dust collector, the problem of the filter cartridge being difficult to remove quickly is solved, achieving the effect of rapid removal and internal wall cleaning.
Patent Information
- Application Number
- CN202610291892.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2026-03-11
- Publication Date
- 2026-06-23
- Estimated Expiration
- 2046-03-11
AI Technical Summary
In the existing technology, the combination of the long-life filter cartridge and the outer cylinder is connected by multiple sets of bolts and other fasteners, which makes it inconvenient to remove the long-life filter cartridge from the outer cylinder. Improvements are needed to achieve quick disassembly.
A low-resistance, long-lasting filter cartridge dust collector was designed. By setting a limiting strip, wedge block, insertion rod, pushing module, and unlocking module inside the outer cylinder, and utilizing the drive gear and lever system of the unlocking module, the filter cartridge can be quickly unlocked and removed.
It enables rapid removal of the filter cartridge, enhances the ease of disassembly and assembly of the outer cylinder, and allows for cleaning of the inner wall of the filter cartridge during the removal process to prevent the accumulation of impurities.
Smart Images

Figure CN121819492B_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of cartridge dust collection, specifically relating to a low-resistance, long-lasting cartridge dust collection device. Background Technology
[0002] In the existing technology, during the long-term use of long-life filter cartridges in the outer cylinder, it is necessary to periodically remove the long-life filter cartridges from the outer cylinder for cleaning. However, the long-life filter cartridges are often combined with the outer cylinder by multiple sets of bolts and other fasteners. How to quickly remove the long-life filter cartridges from the outer cylinder has become a technical problem that urgently needs to be solved.
[0003] This invention seeks to mitigate or at least alleviate such problems or defects by providing new or otherwise improved cartridge dust collection methods. Summary of the Invention
[0004] In view of one or more of the above-mentioned defects or improvement needs of the prior art, the present invention provides a low-resistance long-life filter cartridge dust collector, which has the advantage of being able to quickly remove the long-life filter cartridge from the outer cylinder.
[0005] To achieve the above objectives, the present invention provides a low-resistance, long-lasting filter cartridge dust collector, which includes an outer cylinder having multiple sets of limiting strips inside, a lower inclined surface at the tail of the limiting strip, and an upper inclined surface at one end of the limiting strip.
[0006] A cap, which is removably disposed on the outer cylinder, has an extension cylinder communicating with it;
[0007] A connecting cylinder 1 is detachably installed at the tail of the outer cylinder, and a ventilation pipe is provided on one side of the connecting cylinder 1.
[0008] A filter cartridge is located inside the outer cylinder. A rod is slidably inserted through one end of the filter cartridge. An external spring is slidably arranged on the rod. A wedge-shaped block is located at one end of the rod.
[0009] The push module is removably installed inside the connecting cylinder.
[0010] The unlocking module comprises a pushing section and an unlocking section interconnected with the pushing section. When the unlocking section is driven, it can drive the pushing module to tend to push the filter cartridge upwards and force the pushing section to tend to move towards the inside of the filter cartridge. When the filter cartridge is pushed, it tends to disengage from the outer cylinder.
[0011] As a further improvement of the present invention, a through groove is provided at the tail of the outer cylinder, and an insert ring is detachably installed at the tail of the cap, and the insert ring can pass through the through groove.
[0012] As a further improvement of the present invention, the unlocking module has a pushing segment comprising:
[0013] Connecting cylinder two is detachably arranged inside connecting cylinder one. An internal rod is slidably arranged inside connecting cylinder two. A scraping ring is detachably arranged at one end of the internal rod.
[0014] An internal spring is slidably mounted on the internal rod;
[0015] Unlock the column wheel, which is detachably mounted to one end of the built-in rod;
[0016] The lever is located within the built-in spring;
[0017] The unlocking module has the following unlocking segments:
[0018] A drive column wheel is detachably mounted on the lever;
[0019] A drive gear one is detachably mounted at the tail of the drive column wheel via a rotating shaft;
[0020] The unlocking component is detachably mounted on the connecting cylinder and meshes with the drive gear.
[0021] As a further improvement of the present invention, the bottom of the unlocking roller is composed of the same left and right portions, and the left and right portions of the unlocking roller form two sets of gaps. When the unlocking roller is located on the left, it is composed of a descending slope, a concave slope, and a rising slope. One end of the descending slope is connected to one end of the concave slope, and the other end of the concave slope is connected to one end of the rising slope.
[0022] As a further improvement of the present invention, the lever is composed of a column segment and a toggle segment connected to the column segment, wherein the toggle segment has two sets of side ears, and in the initial position, the two sets of side ears of the toggle segment respectively abut against the two sets of gaps of the unlocking column wheel.
[0023] As a further improvement of the present invention, the unlocking component consists of a short rod, a drive wheel connected to the short rod, and a second drive gear connected to the short rod, wherein the short rod can pass through the first connecting cylinder, and the second drive gear meshes with the first drive gear.
[0024] As a further improvement of the present invention, the drive column wheel has a first curved groove, a first straight groove, a second curved groove, and a second straight groove. One end of the first curved groove is connected to one end of the first straight groove, the other end of the first straight groove is connected to one end of the second curved groove, the other end of the second curved groove is connected to one end of the second straight groove, and the other end of the second straight groove is connected to the other end of the first curved groove.
[0025] As a further improvement of the present invention, the push module includes:
[0026] The lower shaft cylinder is detachably installed inside the connecting cylinder and has a cavity inside the lower shaft cylinder;
[0027] An extension shaft is slidably disposed within the cavity of the lower shaft cylinder;
[0028] A connecting rod, which is detachably mounted on the extension shaft, has a ball head detachably mounted on one end of the connecting rod.
[0029] As a further improvement of the present invention, in the initial position, the ball head can be inserted into the first groove, and the ball head is located at the lowest point of the first groove.
[0030] As a further improvement of the invention, a shim is detachably mounted on the top of the extension shaft, wherein, in the initial position, the height of the shim is lower than the height of the scraping ring.
[0031] In summary, the beneficial effects of the above-described technical solutions conceived by this invention compared with the prior art include:
[0032] The low-resistance, long-lasting filter cartridge dust collector of the present invention, through the arrangement of the unlocking module, drives the drive gear and drive roller to rotate by rotating the unlocking component. When the drive roller rotates, it drives the lever to rotate. The two sets of side ears in the lever can rotate out of the two gaps of the unlocking roller and move into the descending slope to push the unlocking roller upward and squeeze the scraping ring upward. This drives the scraping ring to scrape the inner wall of the filter cartridge, preventing impurities from accumulating inside the filter cartridge. At the same time, during the rotation of the drive roller, it drives the ball head along the first... The path movement of the groove drives the extension shaft to move upward. During the upward movement of the extension shaft, the filter cartridge can be pushed upward along the limit bar. Firstly, the wedge block moves upward along the lower inclined surface and is compressed towards the filter cartridge, which can drive the filter cartridge to be unlocked from the outer cylinder, thereby removing the filter cartridge from the outer cylinder. This allows for quick removal of the filter cartridge and enhances the speed of disassembly and assembly of the outer cylinder. Secondly, after the filter cartridge is pushed upward, it can again cause the inner wall of the filter cartridge to rub against the scraping ring, thereby cleaning the inner wall of the filter cartridge. Attached Figure Description
[0033] Figure 1 This is a schematic diagram of the overall structure of the low-resistance, long-lasting filter cartridge dust collector of the present invention;
[0034] Figure 2 This is an exploded view of the low-resistance, long-lasting filter cartridge dust collector of the present invention;
[0035] Figure 3 The low-resistance, long-lasting filter cartridge dust collector of the present invention is viewed from the side. Figure 2 A schematic diagram of the structure at that time;
[0036] Figure 4 This is a schematic diagram of the overall structure of the filter cartridge of the present invention;
[0037] Figure 5 This is a schematic diagram of the structure of the unlocking module and the push module of the present invention when they are combined.
[0038] Figure 6 This is a split view of the unlocking module of the present invention;
[0039] Figure 7 This is a schematic diagram of the structure of the lever and the unlocking pinwheel of the present invention when they are combined.
[0040] Figure 8 This is a schematic diagram of the structure when the lever and the unlocking pinwheel of the present invention are separated.
[0041] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 1. Outer cylinder; 11. Limiting strip; 12. Lower inclined surface; 13. Upper inclined surface; 2. Cover; 21. Extension cylinder; 22. Insert ring; 3. Connecting cylinder one; 31. Ventilation pipe; 4. Filter cylinder; 41. Wedge block; 42. Insert rod; 43. External spring; 5. Unlocking module; 51. Connecting cylinder two; 52. Internal rod; 53. Internal spring; 54. Unlocking column wheel; 55. Scraping ring; 56. Drive column wheel; 57. Lever; 58. Drive gear one; 59. Unlocking component; 6. Pushing module; 61. Lower shaft cylinder; 62. Extension shaft; 63. Connecting rod; 64. Ball head. Detailed Implementation
[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0043] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The terms “comprising,” “including,” etc., as used herein indicate the presence of the stated features, steps, operations, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, or components.
[0044] All terms used herein (including technical and scientific terms) have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein are to be interpreted in a manner consistent with the context of this specification, and not in an idealized or overly rigid way.
[0045] In the embodiments, by Figure 1-8 Provided is a low-resistance, long-lasting cartridge dust collector, comprising: an outer cylinder 1 having multiple sets of limiting strips 11 inside, with a lower inclined surface 12 at the tail of each limiting strip 11 and an upper inclined surface 13 at one end of each limiting strip 11; a cover 2 removably mounted on the outer cylinder 1, with an extension cylinder 21 communicating with it; a connecting cylinder 3 detachably mounted at the tail of the outer cylinder 1, with a ventilation pipe 31 on one side of the connecting cylinder 3; and a filter cartridge 4 located inside the outer cylinder 1. A rod 42 is slidably inserted through one end of the filter cartridge 4, and an external spring 43 is slidably arranged on the rod 42. A wedge block 41 is provided at one end of the rod 42. A pushing module 6 is removably arranged inside the connecting cylinder 3. An unlocking module 5 is composed of a pushing section and an unlocking section connected to the pushing section. When the unlocking section is driven, it can drive the pushing module 6 to tend to push the filter cartridge 4 upward, and can force the pushing section to tend to move towards the inside of the filter cartridge 4. When the filter cartridge 4 is pushed, it tends to disengage from the outer cylinder 1.
[0046] The overall concept of this invention is as follows: through the deployment of the unlocking module 5, rotating the unlocking component 59 drives the drive gear 58 and the drive roller 56 to rotate. When the drive roller 56 rotates, it drives the lever 57 to rotate. The two sets of side ears in the lever 57 can rotate from the two sets of gaps in the unlocking roller 54, respectively displacing into the descending slope to push the unlocking roller 54 upward and simultaneously squeeze the scraping ring 55 upward. This drives the scraping ring 55 to scrape the inner wall of the filter cartridge 4, preventing impurities from accumulating inside the filter cartridge 4. At the same time, during the rotation of the drive roller 56, it drives the ball head 64 along the first... The path movement of the groove drives the extension shaft 62 to move upward. During the upward movement of the extension shaft 62, the filter cartridge 4 can be pushed to move upward along the limit bar 11. Firstly, the wedge block 41 moves upward along the lower inclined surface 12 and is compressed in the direction of the filter cartridge 4, which can drive the filter cartridge 4 to be unlocked from the outer cylinder 1, and then the filter cartridge 4 can be taken out from the outer cylinder 1. The filter cartridge 4 can be quickly removed, which enhances the speed of disassembly and assembly of the outer cylinder 1. Secondly, after the filter cartridge 4 is pushed upward, it can again cause the inner wall of the filter cartridge 4 to rub against the scraping ring 55, so as to clean the inner wall of the filter cartridge 4.
[0047] In some embodiments, more specifically, in order to facilitate the quick assembly of the cap 2 onto the outer cylinder 1, a through groove is provided at the tail of the outer cylinder 1, and an insert ring 22 can be detachably installed at the tail of the cap 2, and the insert ring 22 can pass through the through groove.
[0048] Next, the overall operating principle and effect of the unlocking module 5 will be further explained. The pushing section of the unlocking module 5 includes: a second connecting cylinder 51, which is detachably arranged inside the first connecting cylinder 3. An internal rod 52 is slidably arranged inside the second connecting cylinder 51. A scraping ring 55 is detachably arranged at one end of the internal rod 52; an internal spring 53, which is slidably arranged on the internal rod 52; an unlocking column wheel 54, which is detachably installed at one end of the internal rod 52; and a lever 57, which is located inside the internal spring 53. The unlocking section of the unlocking module 5 includes: a drive column wheel 56, which is detachably arranged on the lever 57; a drive gear 58, which is detachably arranged at the tail of the drive column wheel 56 via a rotating shaft; and an unlocking member 59, which is detachably arranged on the first connecting cylinder 3, and the unlocking member 59 and the drive gear 58 mesh with each other.
[0049] Next, the overall operating principle and effect of the unlocking module 5 will be further explained. By rotating the unlocking component 59, the drive gear 58 and the drive roller 56 can be driven to rotate. When the drive roller 56 rotates, it can drive the lever 57 to rotate. The two sets of side ears in the lever 57 can rotate from the two sets of gaps in the unlocking roller 54 and move into the descending slope to push the unlocking roller 54 upward and squeeze the scraping ring 55 upward. This can drive the scraping ring 55 to scrape the inner wall of the filter cartridge 4, which can prevent impurities from accumulating in the filter cartridge 4. At the same time, during the rotation of the drive roller 56, the ball head 64 can be driven along... The path movement of the first groove drives the extension shaft 62 to move upward. During the upward movement of the extension shaft 62, the filter cylinder 4 can be pushed upward along the limit bar 11. Firstly, the wedge block 41 moves upward along the lower inclined surface 12 and is compressed in the direction of the filter cylinder 4, which can drive the filter cylinder 4 to be unlocked from the outer cylinder 1, and then the filter cylinder 4 can be taken out from the outer cylinder 1. The filter cylinder 4 can be quickly removed, which enhances the speed of disassembly and assembly of the outer cylinder 1. Secondly, after the filter cylinder 4 is pushed upward, it can again cause the inner wall of the filter cylinder 4 to rub against the scraping ring 55, so as to clean the inner wall of the filter cylinder 4.
[0050] In some embodiments, more specifically, in order to facilitate the unlocking column wheel 54 being triggered by the lever 57 and to enable the unlocking column wheel 54 to perform an unlocking action between the unlocking member 59, the bottom of the unlocking column wheel 54 is composed of the same left and right portions, and the left and right portions of the unlocking column wheel 54 form two sets of gaps. When the unlocking column wheel 54 is located on the left, it is composed of a descending slope, a concave slope, and a rising slope, wherein one end of the descending slope is connected to one end of the concave slope, and the other end of the concave slope is connected to one end of the rising slope.
[0051] In some embodiments, more specifically, in order to facilitate the unlocking action of the drive unlocking column wheel 54, the lever 57 is composed of a column segment and a toggle segment connected to the column segment, wherein the toggle segment has two sets of side ears, and in the initial position, the two sets of side ears of the toggle segment abut against the two sets of gaps of the unlocking column wheel 54 respectively.
[0052] In some embodiments, more specifically, the unlocking member 59 is further explained by giving a more specific structure and construction. The unlocking member 59 consists of a short rod, a drive wheel connected to the short rod, and a drive gear 2 connected to the short rod. The short rod can pass through the connecting cylinder 3, and the drive gear 2 meshes with the drive gear 58.
[0053] In some embodiments, more specifically, by rotating the drive wheel clockwise, the drive gear two can be rotated. During the rotation of the drive gear two, the drive gear one 58 can be driven to rotate, and the rotation of the drive gear one 58 can drive the drive roller 56 to rotate.
[0054] Next, a more specific structure and construction of the drive column wheel 56 will be given for further explanation. The drive column wheel 56 has a first curved groove, a first straight groove, a second curved groove, and a second straight groove. One end of the first curved groove is connected to one end of the first straight groove, the other end of the first straight groove is connected to one end of the second curved groove, the other end of the second curved groove is connected to one end of the second straight groove, and the other end of the second straight groove is connected to the other end of the first curved groove.
[0055] Next, the overall operating principle and effect of the drive roller 56 will be further explained. During the rotation of the drive roller 56, the ball head 64 can drive the ball head 64 and the extension shaft 62 to move upward as a whole while moving along the first groove. After the extension shaft 62 moves upward, it can push the filter cartridge 4 to move in the direction of separating from the outer cylinder 1. When the extension shaft 62 moves to the first straight groove, the extension shaft 62 can remain stationary while the drive roller 56 rotates. When the ball head 64 moves to the second groove, it can drive the extension shaft 62 to move downward, which can push the extension shaft 62 back into the lower shaft cylinder 61. When the ball head 64 moves to the second straight groove, it can drive the extension shaft 62 to remain stationary while the drive roller 56 rotates, and so on.
[0056] Next, the overall operating principle and effect of the push module 6 will be further explained. The push module 6 includes: a lower shaft cylinder 61, which is detachably installed in the connecting cylinder 3, and has a cavity inside the lower shaft cylinder 61; an extension shaft 62, which is slidably arranged in the cavity of the lower shaft cylinder 61; and a connecting rod 63, which is detachably installed on the extension shaft 62, and a ball head 64 is detachably installed on one end of the connecting rod 63.
[0057] Next, the overall operating principle and effect of the push module 6 will be further explained. During the rotation of the drive column wheel 56, the ball head 64 can be driven to move along the path of the first groove, and the extension shaft 62 can be driven to move upward. During the upward movement of the extension shaft 62, the filter cartridge 4 can be pushed to move upward along the limit bar 11. Firstly, the wedge block 41 moves upward along the lower inclined surface 12 and is compressed in the direction of the wedge block 41 toward the filter cartridge 4, which can drive the filter cartridge 4 to be unlocked from the outer cylinder 1, and then the filter cartridge 4 can be taken out from the outer cylinder 1, which can quickly remove the filter cartridge 4.
[0058] In some embodiments, more specifically, the ball head 64 is able to penetrate into the first groove in the initial position, and the ball head 64 is located at the lowest point of the first groove.
[0059] In some embodiments, more specifically, in order to facilitate the smooth ejection of the filter cartridge 4 from the outer cylinder 1 by the extension shaft 62, a gasket is detachably installed on the top of the extension shaft 62, wherein, in the initial position, the height of the gasket is lower than the height of the scraping ring 55.
[0060] In summary, the unlocking module 5, when rotated, drives the drive gear 58 and drive roller 56 to rotate. When the drive roller 56 rotates, it drives the lever 57 to rotate. The two sets of side ears in the lever 57 rotate through the two gaps in the unlocking roller 54, displacing them into the descending slope to push the unlocking roller 54 upwards and simultaneously press the scraping ring 55 upwards. This drives the scraping ring 55 to scrape the inner wall of the filter cartridge 4, preventing impurities from accumulating inside. Simultaneously, during the rotation of the drive roller 56, the ball head 64 is driven to move along the path of the first groove. The extension shaft 62 moves upward, and during the upward movement of the extension shaft 62, the filter cartridge 4 can be pushed upward along the limit bar 11. Firstly, the wedge block 41 moves upward along the lower inclined surface 12 and is compressed towards the filter cartridge 4, which can drive the filter cartridge 4 to be unlocked from the outer cylinder 1, and then the filter cartridge 4 can be taken out from the outer cylinder 1. This allows for quick removal of the filter cartridge 4 and enhances the speed of disassembly and assembly of the outer cylinder 1. Secondly, after the filter cartridge 4 is pushed upward, it can again cause the inner wall of the filter cartridge 4 to rub against the scraping ring 55, so as to clean the inner wall of the filter cartridge 4.
[0061] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A low-resistance, long-lasting cartridge dust collector, characterized in that, It includes: The outer cylinder (1) has multiple sets of limiting strips (11) inside, with a lower inclined surface (12) at the tail of the limiting strip (11) and an upper inclined surface (13) at one end of the limiting strip (11). A cover (2) is removably disposed on the outer cylinder (1), and the cover (2) has an extension cylinder (21) connected thereto. Connecting cylinder 1 (3) is detachably arranged at the tail of the outer cylinder (1), and a ventilation pipe (31) is provided on one side of the connecting cylinder 1 (3). A filter cartridge (4) is located inside the outer cylinder (1). A rod (42) is slidably inserted through one end of the filter cartridge (4). An external spring (43) is slidably arranged on the rod (42). A wedge block (41) is located at one end of the rod (42). The push module (6) is removably disposed inside the connecting cylinder (3); The unlocking module (5) is composed of a pushing section and an unlocking section connected to the pushing section. When the unlocking section is driven, it can drive the pushing module (6) to tend to push the filter cylinder (4) upward, and can force the pushing section to tend to move towards the inside of the filter cylinder (4). When the filter cylinder (4) is pushed, it tends to disengage from the outer cylinder (1). The unlocking module (5) has a pushing section including: Connecting cylinder two (51) is detachably arranged inside the connecting cylinder one (3). An internal rod (52) is slidably arranged inside the connecting cylinder two (51). A scraping ring (55) is detachably arranged at one end of the internal rod (52). An internal spring (53) is slidably arranged on the internal rod (52); Unlocking column wheel (54), which is detachably mounted at one end of the built-in rod (52); The lever (57) is located within the built-in spring (53); The unlocking module (5) has the following unlocking segments: Drive column wheel (56), which is detachably mounted on the lever (57); Drive gear 1 (58) is detachably mounted at the tail of the drive column wheel (56) via a rotating shaft; The unlocking component (59) is detachably mounted on the connecting cylinder (3), and the unlocking component (59) meshes with the drive gear (58). The bottom of the unlocking roller (54) is composed of the same left and right parts. The left and right parts of the unlocking roller (54) form two sets of gaps. When the unlocking roller (54) is located on the left, it is composed of a descending slope, a concave slope and a rising slope. One end of the descending slope is connected to one end of the concave slope, and the other end of the concave slope is connected to one end of the rising slope. The drive column wheel (56) has a first curved groove, a first straight groove, a second curved groove, and a second straight groove. One end of the first curved groove is connected to one end of the first straight groove, the other end of the first straight groove is connected to one end of the second curved groove, the other end of the second curved groove is connected to one end of the second straight groove, and the other end of the second straight groove is connected to the other end of the first curved groove.
2. The low-resistance, long-lasting cartridge dust collector according to claim 1, characterized in that, The outer cylinder (1) also has a through groove at its tail end, and a plug ring (22) can be detachably installed at the tail end of the cover (2), and the plug ring (22) can pass through the through groove.
3. The low-resistance, long-lasting cartridge dust collector according to claim 2, characterized in that, The lever (57) consists of a column segment and a toggle segment connected to the column segment. The toggle segment has two sets of side ears. In the initial position, the two sets of side ears of the toggle segment abut against the two sets of gaps of the unlocking column wheel (54).
4. The low-resistance, long-lasting cartridge dust collector according to claim 3, characterized in that, The unlocking component (59) consists of a short rod, a drive wheel connected to the short rod, and a second drive gear connected to the short rod. The short rod can pass through the first connecting cylinder (3), and the second drive gear meshes with the first drive gear (58).
5. The low-resistance, long-lasting cartridge dust collector according to claim 4, characterized in that, The push module (6) includes: The lower shaft cylinder (61) is detachably installed inside the connecting cylinder (3) and has a cavity inside the lower shaft cylinder (61); An extension shaft (62) is slidably disposed within the cavity of the lower shaft cylinder (61); A connecting rod (63) is detachably mounted on the extension shaft (62), and a ball head (64) is detachably mounted on one end of the connecting rod (63).
6. The low-resistance, long-lasting cartridge dust collector according to claim 5, characterized in that, in, In the initial position, the ball head (64) can penetrate into the first groove, and the ball head (64) is located at the lowest point of the first groove.
7. The low-resistance, long-lasting cartridge dust collector according to claim 6, characterized in that, A shim is also detachably mounted on the top of the extension shaft (62), wherein, in the initial position, the height of the shim is lower than the height of the scraping ring (55).
Citation Information
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