Filter paper hole rolling tool for frame type oil filter

Abstract

The invention belongs to the technical field of frame-type oil filters, and particularly relates to a filter paper hole rolling tool for a frame-type oil filter, which comprises a workbench and a linearly moving hole forming cutter, a through hole corresponding to the hole forming cutter in position is formed in the surface of the workbench, the filter paper hole rolling tool is characterized in that the hole forming cutter is of a hollow tubular structure, a cutter edge is arranged at the bottom end of the hole forming cutter, and the through hole is communicated with the through hole. A center rod is arranged on the inner side of the trepanning cutter, and the trepanning cutter and the center rod both rotate during hole pricking work; the axis of the center rod coincides with the axis of the trepanning tool, and the rotating direction of the trepanning tool is opposite to the rotating direction of the center rod. A conical part is arranged at the bottom end of the center rod, in the orthographic projection direction, the edge of a cutting edge of the trepanning cutter is located within the range of the conical part, a low-pressure trepanning mode is adopted, so that the trepanning cutter trepans multiple pieces of filter paper in the rotating state, paper cutting is facilitated, and the efficiency is improved. Therefore, the problem of unequal hole diameters and positions caused by excessive pressure applied to a plurality of pieces of filter paper is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of frame type oil filters, and in particular relates to a filter paper hole punching tool for frame type oil filters. Background Art

[0002] The plate and frame oil filter is composed of filter bed, oil pump and coarse filter and other components. Filter paper or filter cloth as filter medium is lined between the filter plate and the filter frame. The filter plate and the filter frame are fixed to form a separate filter chamber by the pressure of the pressing device. The filter paper or filter cloth pressed between the filter plate and the filter frame plays a filtering role. The plate and frame oil filter is specially designed for power plants, power stations, industrial and mining enterprises, lubricating oil warehouses, tractor stations, petroleum, chemical, metallurgical and national defense units. It is mainly used to filter trace moisture and impurities in transformer oil, turbine oil, engine oil, diesel, aviation hydraulic oil and other oils. There is filter paper between the filter plate and the filter frame. The filter paper needs to be drilled before installation. Punching is now commonly used for punching filter paper. When punching multiple filter papers at a time, the holes will be inaccurate in position and the hole diameters will be unequal. Therefore, multiple filter papers cannot be punched at the same time, which is inefficient. Summary of the invention

[0003] In order to solve the problems raised in the above background technology, the present invention provides a frame-type oil filter filter paper punching tool to avoid the problem of unequal hole diameters and positions caused by excessive pressure applied to multiple filter papers during the punching work.

[0004] To achieve the above object, the present invention provides the following technical solution: a frame-type oil filter filter paper punching tool, comprising a workbench and a linearly movable punching tool, the workbench surface is provided with a through hole corresponding to the position of the punching tool, characterized in that: the punching tool is a hollow tubular structure, the bottom end of the punching tool is provided with a knife edge, the inner side of the punching tool is provided with a center rod, and during the punching operation, the punching tool and the center rod both rotate;

[0005] The axis of the center rod coincides with the axis of the hole-making tool, and the rotation direction of the hole-making tool is opposite to the rotation direction of the center rod;

[0006] A conical portion is arranged at the bottom end of the center rod, and in the orthographic projection direction, the edge of the cutting edge of the hole-making tool is located within the range of the conical portion.

[0007] As a preferred tool for punching holes in filter paper of a frame-type oil filter of the present invention, the bottom of the punching tool is arranged to have a wavy blade edge.

[0008] As a preferred tool for punching holes in filter paper of a frame type oil filter of the present invention, a plurality of blind grooves distributed at equal intervals are provided on the surface of the conical portion, and in the orthographic projection direction, the edge of the punching tool is located within the range of the blind groove.

[0009] As a preferred tool for punching holes in filter paper of a frame-type oil filter of the present invention, a threaded plate is fixedly connected to the outer surface of one end of the center rod.

[0010] As a preferred tool for punching holes in filter paper of a frame-type oil filter of the present invention, a triangular blade is fixedly connected to the outer surface of the center rod above the threaded plate.

[0011] As a preferred tool for punching holes in filter paper of a frame-type oil filter of the present invention, the hole punching tool comprises an integrally formed cutter head and a cutter rod portion, and the diameter of the cutter rod is smaller than the diameter of the cutter head.

[0012] As a preferred frame-type oil filter paper punching tool of the present invention, two limiting rings are fixedly connected to the outer side of one end of the punching tool, and the outer surface of the punching tool is rotatably connected to a symmetrically arranged rotating bracket, and the rotating bracket is located between the two limiting rings.

[0013] As a preferred filter paper hole punching tool for a frame-type oil filter of the present invention, a transmission rod is fixedly connected to the inner side of one end of the rotating bracket, a bearing plate is fixedly connected to the outer side of the top end of the transmission rod, the top of the bearing plate is fixedly connected to the output end of the first linear drive, the outer side of the first linear drive is fixedly connected to a connecting bracket, one end of the transmission rod is fixedly connected to the outer side of a mounting bracket, the bottom end of the mounting bracket is fixedly connected to a first driving motor, the outer side of a main shaft of the first driving motor is fixedly connected to an umbrella gear, the umbrella gear is meshed with teeth arranged on the top of the hole opening tool, the top of the mounting bracket is fixedly connected to a second driving motor, the main shaft of the second driving motor is fixedly connected to the top of the center rod, and the outer side of one end of the center rod is rotatably connected to the inner side of one end of the mounting bracket, the outer side of the end of the connecting bracket is fixedly connected to a support plate, and the support plate is fixedly mounted on the table top of the workbench through a fixed bracket.

[0014] As a preferred frame-type oil filter paper punching tool of the present invention, one end of the support plate is fixedly connected to the second linear drive through a connecting bracket, the end of the output shaft of the second linear drive is fixedly connected to a pressure plate, a reinforcing edge is provided at the edge of the upper surface of the pressure plate, and a reinforcing rib is fixedly connected to the upper surface of the pressure plate, and the reinforcing rib is connected to the reinforcing edge.

[0015] As a preferred tool for punching holes in filter paper of a frame type oil filter of the present invention, a limit plate is movably connected to the surface of the workbench, the edge of the limit plate is slidably connected to the limit strip, and the outer side of the bottom end of the limit strip is fixedly connected to the surface of the workbench.

[0016] Compared with the prior art, the beneficial effects of the present invention are: a low-pressure hole-opening method is adopted, so that the hole-opening tool opens holes in multiple filter papers in a rotating state, and at the same time, the center rod and the hole-opening tool rotate in opposite directions, which is beneficial to the discharge of the cut paper and the cutting of the paper, thereby avoiding the problem of unequal hole diameters and positions caused by excessive pressure on multiple filter papers. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the installation structure of the connecting bracket in the present invention;

[0020] Figure 3 It is a schematic diagram of the installation structure of the limiting plate in the present invention;

[0021] Figure 4 It is a schematic diagram of the connection structure of the hole-opening tool in the present invention;

[0022] Figure 5 It is a schematic diagram of the connection structure of the mounting bracket in the present invention;

[0023] Figure 6 A cross-sectional view of the connection structure of the hole-opening tool in the present invention;

[0024] Figure 7 It is a structural schematic diagram of the wavy blade in the present invention;

[0025] Figure 8 For the present invention Figure 7 Schematic diagram of the enlarged structure at A;

[0026] Fig. 9 This is a schematic diagram of the filter paper being squeezed in the present invention;

[0027] In the figure:

[0028] 1. Workbench; 101. Through hole; 2. Drilling tool; 3. Center rod;

[0029] 201, wavy blade; 202, blade head; 203, blade rod; 204, limit ring; 205, teeth;

[0030] 301, tapered portion; 302, blind groove; 303, threaded plate; 304, triangular blade;

[0031] 4. Rotating bracket; 5. Transmission rod; 6. Load-bearing plate; 7. First linear drive; 8. Connecting bracket; 9. Mounting bracket; 10. First drive motor; 11. Bevel gear; 12. Second drive motor; 13. Support plate; 14. Fixed bracket; 15. Second linear drive; 16. Pressing plate; 17. Reinforced edge; 18. Reinforcement rib; 19. Limiting plate; 20. Limiting strip. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] like Figure 1-Figure 9 As shown:

[0034] A frame-type oil filter filter paper punching tool comprises a workbench 1 and a straight-line moving punching tool 2. A through hole 101 corresponding to the position of the punching tool 2 is formed on the workbench 1. The through hole 101 can accommodate the punching tool 2, so as to cut and punch a hole in the filter paper at the bottom. The punching tool 2 is a hollow tubular structure. A blade is formed at the bottom end of the punching tool 2. A center rod 3 is formed inside the punching tool 2. When punching a hole, the punching tool 2 and the center rod 3 both rotate.

[0035] The axis of the center rod 3 coincides with the axis of the hole-making tool 2, and the rotation direction of the hole-making tool 2 is opposite to the rotation direction of the center rod 3;

[0036] A conical portion 301 is provided at the bottom end of the center rod 3 , and in the orthographic projection direction, the edge of the cutting edge of the hole-making tool 2 is located within the range of the conical portion 301 .

[0037] In this scheme, the plate and frame oil filter is composed of components such as a filter bed, an oil pump and a coarse filter. A filter paper or filter cloth as a filter medium is lined between the filter plate and the filter frame. The filter plate and the filter frame are fixed to form a separate filter chamber by the pressure of a pressing device. The filter paper or filter cloth pressed between the filter plate and the filter frame plays a filtering role. The plate and frame oil filter is specially designed for various power plants, power stations, industrial and mining enterprises, lubricating oil warehouses, tractor stations, petroleum, chemical, metallurgical, and national defense units. It is mainly used to filter trace moisture and impurities in transformer oil, turbine oil, engine oil, diesel, aviation hydraulic oil and other oils. There is filter paper between the filter plate and the filter frame. The filter paper needs to be drilled before installation. At present, punching is generally used for punching the filter paper. In the work of punching multiple filter papers at a time, the holes will be inaccurate in position and the hole diameters will be unequal. Therefore, multiple filter papers cannot be punched at the same time, which is inefficient.

[0038] like Fig. 9The force changes of multiple filter papers during the punching operation are shown in FIG. 1 . Compared with ordinary book paper, the filter paper is thicker, has coarser fibers, and is softer in texture. When the punch passes through the filter paper, the punch exerts greater pressure on the filter paper, causing the stacked filter paper to have local wrinkles, which are more obvious when there are more layers of filter paper. When the filter paper is not under force, the stacked filter paper presents a square three-dimensional structure with straight edges. When the stacked filter paper is squeezed, Fig. 9 As shown, the squeezed part of the filter paper will be compressed, so that the filter paper at the squeezed part is thinner, and the filter paper at the squeezed part will spread out to the surroundings, and finally when the punch is used to punch the hole, the edge of the stacked filter paper is in an arc state, that is, the part at the center of the filter paper is squeezed to other places, so that the width of the filter paper is increased. In addition, since the filter paper is stacked in multiple sheets, the overall force is uneven. For example, the filter paper at the bottom layer or near the bottom layer will be resisted by the table surface of the workbench 1, and the force is relatively uniform. The filter paper on the top side is directly in contact with the punch and the force is relatively uniform. The filter paper in the middle area is subjected to pressure indirectly transmitted from other filter papers. The main force-bearing areas and force distributions of different filter papers are different. Finally, when the entire stacked filter paper is punched through, there are certain differences in the diameters of the holes processed by the punch on the filter papers at different positions. If the density distribution of the filter paper is uneven, it will also lead to the hole not being a very standard circle under complex force conditions. This situation is more serious when the filter paper is thicker, softer and as the filter paper is thicker, softer and thicker, the hole diameters of the filter paper at different positions are different. This is more obvious when the number of paper layers increases; when the filter paper is squeezed by the punch, the squeezed part of the filter paper stretches. When the punch passes through this part, the diameter of the hole punched out in the squeezed state is the same as the outer diameter of the punch. When the punch is pulled out, the applied pressure disappears, the filter paper returns to its original state, and the phenomenon of being squeezed and stretched disappears, which will cause the diameter of the hole punched out of the filter paper to shrink, and ultimately cause the diameters of the filter paper holes at different positions of the entire stacked filter paper to be different in one punching operation. This is why when the punch is pulled out, some filter papers will be tightly squeezed on the punch, while some filter papers are easily separated from the filter paper; and the more layers of filter paper are stacked, the worse the stability of the stacking is, and punching is only performed at the four corners of the filter paper. Therefore, when the punch is punching, due to the large pressure exerted by the punch on the filter paper, the stacked filter paper is also prone to skew, that is, the neatly stacked filter paper will become uneven, further leading to the problem of deviation of the opening position, and this situation becomes more serious with the increase of the number of stacked layers.

[0039] In order to solve this problem, the traditional direct extrusion punching method is abandoned, and a low-pressure hole-making method is adopted, so that the hole-making tool 2 makes holes in multiple filter papers in a rotating state, and the center rod 3 and the hole-making tool 2 rotate in the opposite direction, which is conducive to the discharge of the cut paper and the cutting of the paper, thereby avoiding the problem of unequal hole diameters and positions caused by excessive pressure on multiple filter papers;

[0040] During the piercing operation, the filter paper is first positioned and fixed, and then the piercing tool 2 is moved downward to apply pressure to the filter paper. At the same time, the piercing tool 2 needs to rotate, but pressure is not the main means to achieve cutting. A conical portion 301 is provided at the bottom end of the center rod 3, and in the direction of the orthographic projection, the edge of the blade of the piercing tool 2 is located within the range of the conical portion 301, that is, before the piercing tool 2 contacts the filter paper, the conical portion 301 has already penetrated into the filter paper. The structural characteristics of the conical portion 301 make it easier to penetrate into the filter paper. Since both the center rod 3 and the piercing tool 2 need to rotate, but in opposite directions, the piercing tool 2 contacts and rotates with a certain pressure to cut the filter paper. The circular filter paper covered by the piercing tool 2 is cut off, and the friction between the rotation of the center rod 3 and the cut filter paper is assisted by the reverse rotation of the center rod 3, so that the cut filter paper is The edge of the paper has a force moving toward the center direction of the center rod 3. At the same time, under the action of friction, the center rod 3 will make the cut filter paper have a force to move relative to other parts of the filter paper, thereby assisting the hole-opening tool 2 to cut the filter paper. During the work of the hole-opening tool 2 cutting the filter paper, the cut filter paper actively moves relative to other parts of the filter paper, and the edge of the cut filter paper is actively separated from the other parts of the filter paper. During the cutting work of the hole-opening tool 2, the filter paper cut by the hole-opening tool 2 is in a tensioned state, and the force applied by the cutting tool can act more evenly on the cutting part. When the filter paper is in a tensioned state, the cutting can ensure that the cutting edge is neat, and no additional resistance will be generated due to structural changes during cutting. For example, when cutting a rope, the rope fibers are arranged in order when straightened, and the resistance encountered by the tool when cutting is small; if the rope is entangled and bent, the fibers are entangled with each other, which increases the cutting resistance, thereby increasing the difficulty of cutting and poor cutting effect.

[0041] In an optional embodiment, the bottom of the hole-opening tool 2 is set as a wavy blade 201. Since the hole-opening tool 2 is mainly used for cutting to open holes, and the hole-opening tool 2 cuts in a rotating state, the design of the wavy blade 201 is beneficial to reducing the contact area between the blade and the filter paper, which is more conducive to the cutting work.

[0042] In an optional embodiment, a plurality of blind grooves 302 distributed at equal intervals are formed on the surface of the conical portion 301 , and in the orthographic projection direction, the edge of the cutting edge of the hole-opening tool 2 is located within the range of the blind groove 302 .

[0043] In this embodiment, the design of the blind groove 302 is conducive to increasing the contact resistance between the tapered portion 301 and the cut filter paper, so that the filter paper is better in a tensioned state.

[0044] In an optional embodiment, a threaded plate 303 is fixedly connected to the outer surface of one end of the central rod 3 .

[0045] In this embodiment, the cut circular filter paper needs to be discharged from the hole-opening tool 2. Through the provided threaded plate 303, the cut filter paper can enter the hole-opening tool 2 and move upward along the inner wall of the hole-opening tool 2 until the cut filter paper is discharged from the top of the hole-opening tool 2.

[0046] In an optional embodiment, a triangular blade 304 is fixedly connected to the outer surface of the center rod 3 above the threaded plate 303 .

[0047] After the cut filter paper is discharged from the top of the hole-opening tool 2, the cut filter paper is squeezed by the cut filter paper below, so that the cut filter paper above contacts the triangular blade 304, and is cut by the triangular blade 304, which facilitates the removal of the cut filter paper and avoids the cut filter paper from piling up on the central rod 3. It should be noted that even if the triangular blade 304 does not completely cut the cut filter paper, the cut filter paper is easier to remove after being cut by the triangular blade 304.

[0048] In an optional embodiment, the hole opening tool 2 includes an integrally formed tool head 202 and a tool rod 203 , and the diameter of the tool rod 203 is smaller than the diameter of the tool head 202 .

[0049] In this embodiment, the diameter of the knife rod 203 is smaller than the diameter of the knife head 202, which can reduce the contact area between the filter paper and the outer surface of the hole-opening tool 2, and avoid excessive friction between the hole-opening tool 2 and the filter paper. At the same time, after the cut filter paper enters the knife rod 203 with a smaller diameter, it will cause the cut filter paper to be squeezed, thereby increasing the friction between the cut filter paper and the inner wall of the knife rod 203, so that the threaded plate 303 can more advantageously move the cut filter paper upward.

[0050] In an optional embodiment, two limiting rings 204 are fixedly connected to the outer side of one end of the hole-punching tool 2 , and the outer surface of the hole-punching tool 2 is rotatably connected to a symmetrically arranged rotating bracket 4 , and the rotating bracket 4 is located between the two limiting rings 204 .

[0051] In this embodiment, the rotating bracket 4 is connected into a whole by bolts, and the centers of the two symmetrically arranged rotating brackets 4 form a ring-shaped structure, which can rotate in coordination with the outer surface of the hole-opening tool 2. By setting two limit rings 204, the position of the rotating bracket 4 relative to the hole-opening tool 2 can be fixed, and it is beneficial for the rotating bracket 4 to drive the limit ring 204 and then drive the hole-opening tool 2 to move.

[0052] In an optional embodiment, a transmission rod 5 is fixedly connected to the inner side of one end of the rotating bracket 4, a bearing plate 6 is fixedly connected to the outer side of the top end of the transmission rod 5, the top of the bearing plate 6 is fixedly connected to the output end of the first linear drive 7, the outer side of the first linear drive 7 is fixedly connected to a connecting bracket 8, one end of the transmission rod 5 is fixedly connected to the outer side of a mounting bracket 9, the bottom end of the mounting bracket 9 is fixedly connected to a first driving motor 10, the outer side of the main shaft of the first driving motor 10 is fixedly connected to a bevel gear 11, the bevel gear 11 is meshingly connected to the teeth 205 set at the top of the hole opening tool 2, the top of the mounting bracket 9 is fixedly connected to a second driving motor 12, the main shaft of the second driving motor 12 is fixedly connected to the top of the center rod 3, and the outer side of one end of the center rod 3 is rotatably connected to the inner side of one end of the mounting bracket 9, the end of the connecting bracket 8 is fixedly connected to a support plate 13, and the support plate 13 is fixedly mounted on the table surface of the workbench 1 through a fixed bracket 14.

[0053] In this embodiment, the fixed bracket 14 can install the support plate 13 above the workbench 1, and make the support plate 13 have a certain distance from the table surface of the workbench 1. The support plate 13 can install the first linear drive 7 or the second linear drive 15 through the connecting bracket 8. The first linear drive 7 can drive the bearing plate 6 and then drive the transmission rod 5 to move. The transmission rod 5 will drive the mounting bracket 9 and the rotating bracket 4 to move. The rotating bracket 4 can drive the drilling tool 2 to move. The mounting bracket 9 can fix the first drive motor 10 and the second drive motor 12. The first drive motor 10 drives the bevel gear 11 to rotate and then drives the drilling tool 2 to rotate. The second drive motor 12 can directly drive the center rod 3 to rotate.

[0054] In an optional embodiment, one end of the support plate 13 is fixedly connected to the second linear drive 15 via a connecting bracket 8, the end of the output shaft of the second linear drive 15 is fixedly connected to a pressure plate 16, a reinforcing edge 17 is provided at the edge of the upper surface of the pressure plate 16, a reinforcing rib 18 is fixedly connected to the upper surface of the pressure plate 16, and the reinforcing rib 18 is connected to the reinforcing edge 17.

[0055] In this embodiment, the second linear drive 15 can directly drive the pressure plate 16 to move to squeeze and fix the filter paper, thereby preventing the filter paper from being displaced during the hole opening operation. The reinforced edge 17 can increase the structural strength of the edge of the pressure plate 16, and the reinforcing ribs 18 can increase the overall structural strength of the pressure plate 16. The combination of the reinforced edge 17 and the reinforcing ribs 18 can make the pressure plate 16 smoother as a whole and further increase the structural strength.

[0056] In an optional embodiment, a limit plate 19 is movably connected to the surface of the workbench 1, the edge of the limit plate 19 is slidably connected to the limit strip 20, and the outer bottom end of the limit strip 20 is fixedly connected to the surface of the workbench 1.

[0057] In this embodiment, the limit plate 19 can move in a straight line through the limit bar 20. A strip groove is provided on the limit plate 19. A screw fixed to the surface of the workbench 1 is provided in the strip groove of the limit plate 19. A manual knob is rotatably connected to the outer side of the screw. After adjusting the position of the limit plate 19, the limit plate 19 can be fastened to the surface of the workbench 1 by the manual knob.

[0058] It should be noted that the first linear drive 7 and the second linear drive 15 can be electric screws or hydraulic cylinders.

[0059] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A filter paper punching tool for a frame-type oil filter, comprising a workbench (1) and a punching tool (2) that moves linearly, wherein a through hole (101) corresponding to the position of the punching tool (2) is formed on the workbench (1), and characterized in that: The hole-punching tool (2) is a hollow tubular structure. A cutting edge is arranged at the bottom end of the hole-punching tool (2). A center rod (3) is arranged inside the hole-punching tool (2). When punching holes, both the hole-punching tool (2) and the center rod (3) rotate. The axis of the center rod (3) coincides with the axis of the hole-making tool (2), and the rotation direction of the hole-making tool (2) is opposite to the rotation direction of the center rod (3); A conical portion (301) is provided at the bottom end of the central rod (3), and in the orthographic projection direction, the edge of the cutting edge of the hole-making tool (2) is located within the range of the conical portion (301).

2. The filter paper punching tool for a frame type oil filter according to claim 1, characterized in that: The bottom of the hole-opening tool (2) is arranged as a wave-shaped cutting edge (201).

3. The filter paper punching tool for a frame type oil filter according to claim 1, characterized in that: The surface of the conical portion (301) is provided with a plurality of blind grooves (302) distributed at equal intervals, and in the orthographic projection direction, the edge of the cutting edge of the hole-opening tool (2) is located within the range of the blind groove (302).

4. The filter paper punching tool for a frame type oil filter according to claim 1, characterized in that: A threaded plate (303) is fixedly connected to the outer surface of one end of the central rod (3).

5. The filter paper punching tool for a frame type oil filter according to claim 4, characterized in that: A triangular blade (304) is fixedly connected to the outer surface of the central rod (3) located above the threaded plate (303).

6. The filter paper punching tool for a frame type oil filter according to any one of claims 1 to 5, characterized in that: The hole-opening tool (2) comprises an integrally formed tool head (202) and a tool rod (203), wherein the diameter of the tool rod (203) is smaller than the diameter of the tool head (202).

7. The filter paper punching tool for a frame type oil filter according to claim 1, characterized in that: Two limiting rings (204) are fixedly connected to the outside of one end of the hole-punching tool (2), and a symmetrically arranged rotating bracket (4) is rotatably connected to the outer surface of the hole-punching tool (2), and the rotating bracket (4) is located between the two limiting rings (204).

8. The filter paper punching tool for a frame type oil filter according to claim 7, characterized in that: A transmission rod (5) is fixedly connected to the inner side of one end of the rotating bracket (4); a bearing plate (6) is fixedly connected to the outer side of the top end of the transmission rod (5); the top end of the bearing plate (6) is fixedly connected to the output end of the first linear drive (7); the outer side of the first linear drive (7) is fixedly connected to a connecting bracket (8); the outer side of one end of the transmission rod (5) is fixedly connected to a mounting bracket (9); the bottom end of the mounting bracket (9) is fixedly connected to a first driving motor (10); the outer side of the main shaft of the first driving motor (10) is fixedly connected to a bevel gear (11); 1), the bevel gear (11) is meshedly connected with the teeth (205) arranged at the top of the hole-opening tool (2), the top of the mounting bracket (9) is fixedly connected with a second drive motor (12), the main shaft of the second drive motor (12) is fixedly connected with the top of the center rod (3), and the outer side of one end of the center rod (3) is rotatably connected with the inner side of one end of the mounting bracket (9), the outer side of the end of the connecting bracket (8) is fixedly connected with a support plate (13), and the support plate (13) is fixedly installed on the table surface of the workbench (1) through a fixing bracket (14).

9. The filter paper punching tool for a frame type oil filter according to claim 8, characterized in that: One end of the support plate (13) is fixedly connected to the second linear drive (15) via a connecting bracket (8); the end of the output shaft of the second linear drive (15) is fixedly connected to a pressure plate (16); a reinforcing edge (17) is provided at the edge of the upper surface of the pressure plate (16); a reinforcing rib (18) is fixedly connected to the upper surface of the pressure plate (16), and the reinforcing rib (18) is connected to the reinforcing edge (17).

10. The filter paper punching tool for a frame type oil filter according to claim 1, characterized in that: A limit plate (19) is movably connected to the tabletop of the workbench (1), the edge of the limit plate (19) is slidably connected to a limit strip (20), and the outer side of the bottom end of the limit strip (20) is fixedly connected to the tabletop of the workbench (1).

Images