A self-cleaning filter self-tightening doctor blade

Abstract

The utility model belongs to the technical field of plastic filter relates to a self -cleaning filter self -tightening scraper, including the knife rest and blade, the blade can swing's installation in the blade mounting groove of knife rest side, the blade includes blade body and blade shaft, the blade mounting groove is provided with the axle hole that is adapted with the blade shaft, the inner end of blade shaft is provided with the locking groove, be provided with the locking hole on the knife rest, the locking hole is at the position corresponding to locking groove and is penetrated to the axle hole, locking piece is fixed in the locking hole, locking piece extends into the locking groove, and the locking groove is cooperated and forms the axial locking structure of blade. The self -cleaning scraper for plastic filter provided by the utility model can improve the stability of scraper work.

Description

Technical Field

[0001] This utility model belongs to the technical field of plastic filters, and relates to a self-cleaning filter self-tightening scraper. Background Technology

[0002] The self-cleaning scraper for plastic filters is an essential accessory. It works in conjunction with the filter screen to remove impurities during operation, ensuring the filter screen remains in good working condition.

[0003] Chinese utility model patent CN219681865U (publication date: 2023.09.15) discloses a self-cleaning scraper for a plastic filter, including a blade holder and a blade. The blade includes a blade body and a blade shaft. The diameter of the blade shaft is greater than the thickness of the blade body. The blade holder has a blade mounting groove inclinedly arranged on its side. The blade mounting groove includes a strip groove adapted to the blade body and a circular groove adapted to the blade shaft. The blade shaft is rotatably disposed in the circular groove. A gap is left between the blade body and the inner wall of the strip groove. When the blade shaft rotates in the circular groove, the blade body swings accordingly in the strip groove.

[0004] The drawback of the aforementioned self-cleaning scraper for plastic filters is that the blade is axially limited by a limiting pin screwed in from the end, which presses against the end face of the blade shaft. The unlocking direction of the limiting pin is the same as the removal direction of the blade. Under long-term high-frequency vibration or reverse material pressure, this limiting method may loosen, causing the blade to move axially and affecting scraping stability. Utility Model Content

[0005] This invention addresses the shortcomings of existing technologies by providing a self-cleaning filter self-tightening scraper, which can improve the stability of the scraper's operation.

[0006] To solve the above-mentioned technical problems, the objective of this utility model is achieved through the following technical solution: A self-cleaning filter self-tightening scraper includes a blade holder and a blade. The blade is oscillatingly mounted in a blade mounting groove on the side of the blade holder. The blade includes a blade body and a blade shaft. The blade mounting groove has a shaft hole adapted to the blade shaft. The inner end of the blade shaft has a locking groove. The blade holder has a locking hole. The locking hole extends through the shaft hole at a position corresponding to the locking groove. A locking member is fixed in the locking hole. The locking member extends into the locking groove and cooperates with the locking groove to form an axial locking structure for the blade.

[0007] In the above-mentioned self-cleaning filter self-tightening scraper, the locking element is a set screw, a pin, or an elastic buckle; preferably, the locking hole is a threaded hole, and the locking element is a screw that mates with it, and the end of the screw is inserted into the locking groove by tightening the screw; preferably, the locking hole is a pin hole, and the locking element is a locking pin that is tightly fitted with the pin hole.

[0008] In the aforementioned self-cleaning filter self-tightening scraper, the locking groove is arranged circumferentially along the blade shaft, the locking hole is arranged on one side of the blade holder and extends axially along the blade holder, and the end of the locking member is inserted into the locking groove to form a locking structure; or, the locking groove is arranged on one side of the blade shaft and penetrates the blade shaft in the direction perpendicular to the blade shaft axis, the locking groove forms an arc-shaped groove, the locking hole is arranged axially along the blade holder, and the locking member is inserted into and penetrates the locking groove to form a locking structure.

[0009] In the above-mentioned self-cleaning filter self-tightening scraper, the blade is oscillatingly disposed in the blade mounting groove around the axis of the blade shaft, and a gap is left between the blade body and the inner wall of the blade mounting groove for material to flow in, so that the blade can adaptively fit the filter screen under the action of material pressure.

[0010] In the aforementioned self-cleaning filter self-tightening scraper, the inner end of the blade shaft is provided with an extension, the locking groove is provided on the extension, the inner end of the shaft hole extends beyond the blade mounting groove to accommodate the extension of the blade shaft, and both ends of the blade body are flush with both ends of the blade mounting groove.

[0011] In the above-mentioned self-cleaning filter self-tightening scraper, preferably, the shaft hole is a through hole.

[0012] In the above-mentioned self-cleaning filter self-tightening scraper, the blade mounting groove and the blade are arranged in pairs on both sides of the blade holder and are centrally symmetrically distributed.

[0013] In the above-mentioned self-cleaning filter self-tightening scraper, there are two blade holders arranged in a cross shape; each blade holder is provided with two blades, which are distributed on both sides of the blade holder and are centrally symmetrical.

[0014] In the aforementioned self-cleaning filter self-tightening scraper, the locking hole on the blade holder is located on the mating side of the two parts.

[0015] Compared with the prior art, this utility model has the following advantages: This invention provides a self-cleaning filter self-tightening scraper, which improves the blade's mounting structure. A locking element engages with a locking groove, forming a mechanical interlock structure. The axial release force of the blade shaft requires shearing the locking element, and the locking element's shear strength far exceeds its resistance to loosening. In this structure, vibration and axial impact forces will not cause the locking element to loosen, and its reliability no longer depends on the thread preload but on the strength of the locking element itself. Therefore, the blade of this invention has better vibration and impact resistance, resulting in greater stability during operation. Attached Figure Description

[0016] Figure 1 This is a perspective view of Embodiment 1 of this utility model; Figure 2 This is an exploded view of Embodiment 1 of this utility model; Figure 3 This is a perspective view of Embodiment 2 of this utility model; Figure 4 This is a perspective view of embodiment 3 of this utility model; Figure 5 This is an exploded view of embodiment 3 of this utility model; Reference numerals: 1. Tool holder; 2. Tool; 3. Tool mounting slot; 4. Tool body; 5. Tool shaft; 6. Shaft hole; 7. Locking groove; 8. Locking hole; 9. Locking element; 10. Extension. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. See also: Figure 1-5 : Example 1 A self-cleaning filter self-tightening scraper includes a blade holder 1 and a blade 2. The blade 2 is oscillatingly mounted in a blade mounting groove 3 on the side of the blade holder 1. The blade 2 includes a blade body 4 and a blade shaft 5. The blade mounting groove 3 is provided with a shaft hole 6 adapted to the blade shaft 5. The inner end of the blade shaft 5 is provided with a locking groove 7. The blade holder 1 is provided with a locking hole 8. The locking hole 8 extends through to the shaft hole 6 at a position corresponding to the locking groove 7. A locking member 9 is fixed in the locking hole 8. The locking member 9 extends into the locking groove 7 and cooperates with the locking groove 7 to form an axial locking structure for the blade 2.

[0018] Comparison Appendix Figure 1 and attached Figure 2This embodiment improves upon existing self-cleaning scrapers for plastic filters by modifying the axial locking structure of the blade 2. The locking groove 7 is arranged circumferentially along the blade shaft 5, the locking hole 8 is located on one side of the blade holder 1 and extends axially along the blade holder 1, and the end of the locking member 9 is inserted into the locking groove 7 to form a locking structure. During installation, the blade shaft 5 of the blade 2 is first inserted along the shaft hole 6, so that a portion of the blade body 4 is placed in the blade mounting groove 3, and a portion is located outside the blade mounting groove 3 to form a scraping structure. When the blade 2 reaches the predetermined position, the locking member (such as a set screw) is screwed into the locking hole 8 from the side of the blade holder 1 until its end is firmly engaged in the locking groove 7 on the blade shaft 5. At this point, the locking member and the locking groove 7 form a reliable mechanical interlock, thereby achieving axial limitation of the blade 2 and preventing axial movement during operation.

[0019] After installation, the blade 2 can be oscillating around the axis of the blade shaft 5 and is set in the blade mounting groove 3. A gap is left between the blade body 4 and the inner wall of the blade mounting groove 3 for material to flow in, so that the blade 2 can adaptively fit the filter screen under the action of material pressure.

[0020] Preferably, the inner end of the blade shaft 5 is provided with an extension 10, the locking groove 7 is provided on the extension 10, the inner end of the shaft hole 6 extends beyond the blade mounting groove 3 to accommodate the extension 10 of the blade shaft 5, and the two ends of the blade body 4 are flush with the two ends of the blade mounting groove 3. This structure can better form an axial locking structure and avoid the blade body 4 from affecting the setting of the locking structure. At the same time, the extension 10 of the blade shaft 5 and the corresponding shaft hole 6 cooperate to further increase the stability of the blade 2 installation and prevent the blade 2 from coming out of the blade mounting groove 3.

[0021] Preferably, the shaft hole 6 is a through hole, which facilitates machining and also facilitates auxiliary installation or disassembly of the blade shaft 5 from the other side.

[0022] Preferably, the blade mounting groove 3 and the blade 2 are arranged in pairs on both sides of the blade holder 1 and are centrally symmetrically distributed.

[0023] Example 2 Based on Example 1, this example demonstrates another common layout of the scraper in the filter.

[0024] Comparison Appendix Figure 3 There are two tool holders 1, which are arranged in a cross shape. Each tool holder 1 is provided with two blades 2, which are distributed on both sides of the tool holder 1 and are centrally symmetrical.

[0025] Furthermore, the locking hole 8 on the tool holder 1 is located on the mating side of the two, and the locking member 9 is hidden by the side of the tool holder 1, which can further ensure the stability of the installation of the locking member 9.

[0026] Example 3 Comparison Appendix Figure 4 and attached Figure 5 This embodiment demonstrates another locking structure: the locking groove 7 is disposed on one side of the blade shaft 5 and extends through the blade shaft 5 in the direction perpendicular to the axis of the blade shaft 5 (the direction of the axis of the tool holder 1). The locking groove 7 forms an arc-shaped groove. The locking hole 8 extends through the tool holder 1 in the axial direction. The locking member 9 is inserted into and extends through the locking groove 7 to form a locking structure.

[0027] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection of the present utility model.

Claims

1. A self-cleaning filter self-tightening scraper, comprising a blade holder (1) and a blade (2), wherein the blade (2) is pivotally mounted in a blade mounting groove (3) on the side of the blade holder (1), the blade (2) comprising a blade body (4) and a blade shaft (5), and the blade mounting groove (3) is provided with a shaft hole (6) adapted to the blade shaft (5), characterized in that, The inner end of the blade shaft (5) is provided with a locking groove (7), and the tool holder (1) is provided with a locking hole (8). The locking hole (8) extends through to the shaft hole (6) at the position corresponding to the locking groove (7). A locking member (9) is fixed in the locking hole (8). The locking member (9) extends into the locking groove (7) and cooperates with the locking groove (7) to form an axial locking structure for the blade (2).

2. The self-cleaning filter self-tightening scraper according to claim 1, characterized in that, The locking element (9) is a set screw, a pin, or a resilient buckle.

3. The self-cleaning filter self-tightening scraper according to claim 1, characterized in that, The locking groove (7) is arranged circumferentially along the blade shaft (5), and the locking hole (8) is arranged on one side of the tool holder (1) and extends axially along the tool holder (1).

4. The self-cleaning filter self-tightening scraper according to claim 1, characterized in that, The locking groove (7) is provided on one side of the blade shaft (5) and passes through the blade shaft (5) in the direction perpendicular to the axis of the blade shaft. The locking hole (8) is provided through the blade holder (1) in the axial direction.

5. The self-cleaning filter self-tightening scraper according to claim 1, characterized in that, The blade (2) is oscillatingly disposed in the blade mounting groove (3) around the axis of the blade shaft (5). A gap is left between the blade body (4) and the inner wall of the blade mounting groove (3) for material to flow in, so that the blade (2) can adaptively fit the filter screen under the action of material pressure.

6. The self-cleaning filter self-tightening scraper according to claim 1, characterized in that, The inner end of the blade shaft (5) is provided with an extension (10), the locking groove (7) is provided on the extension (10), the inner end of the shaft hole (6) extends beyond the blade mounting groove (3) to accommodate the extension (10) of the blade shaft (5), and the two ends of the blade body (4) are flush with the two ends of the blade mounting groove (3).

7. The self-cleaning filter self-tightening scraper according to claim 6, characterized in that, The shaft hole (6) is a through hole.

8. The self-cleaning filter self-tightening scraper according to claim 1, characterized in that, The blade mounting slot (3) and the blade (2) are arranged in pairs on both sides of the blade holder (1) and are centrally symmetrically distributed.

9. A self-cleaning filter self-tightening scraper according to claim 3, characterized in that, There are two tool holders (1) arranged in a cross shape; each tool holder (1) is provided with two blades (2), which are distributed on both sides of the tool holder (1) and are centrally symmetrical.

10. A self-cleaning filter self-tightening scraper according to claim 9, characterized in that, The locking hole (8) on the tool holder (1) is located on the mating side of the two.

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