Brush gear pump structure

Abstract

The invention provides a brushed gear pump structure which comprises a machine shell, an oil inlet cover is arranged at one end of the machine shell, and an oil outlet cover is arranged at the other end of the machine shell; wherein a magnetic shoe and a rotor which are matched with each other are arranged between the oil inlet cover and the oil outlet cover, and a rotating shaft is arranged at the axis of the rotor; the oil pumping disc is arranged on the oil inlet cover, a rotating disc is arranged at the eccentric position of the oil pumping disc, an oil pumping groove is formed in the axis position of the rotating disc, and a tooth-shaped piece clamped with the rotating shaft is arranged in the oil pumping groove. According to the brush gear pump structure provided by the invention, the rotor and the magnetic shoe are utilized to enable the rotating shaft to rotate, and meanwhile, the tooth-shaped piece rotates in the rotating disc under the linkage of the rotating shaft, so that negative pressure is formed in the shell, fuel oil enters the oil pumping groove of the rotating disc from the oil inlet end, and bubbles enter a high-pressure area along with the tooth-shaped piece to be broken at the moment; and therefore, the influence of bubbles on output fuel oil is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel pumps, and more particularly to a structure of a brushed gear pump. Background Art

[0002] A fuel pump has an inlet pipe and an outlet pipe, and is mainly assembled inside a fuel tank so that the bottom of the inlet pipe is placed in the fuel tank, and the inlet pipe is connected to the engine fuel unit. When the fuel pump operates, the internal rotating shaft rotates to suck the fuel in the fuel tank, and the fuel continuously supplies to the fuel unit along the outlet pipe, so that the engine runs continuously and stably.

[0003] However, when the engine runs at high frequency and high speed, the relative fuel pump will also work at high frequency. The actual required fuel volume is supplied to the engine, and the excess fuel often flows back to the fuel tank. In this process, the high-speed flow of fuel is likely to generate bubbles. If the bubbles enter the fuel pump along with the fuel, the bubbles will damage the normal fuel suction process of the fuel pump, resulting in unstable fuel supply, and then phenomena such as too low oil pressure and unstable fuel supply will occur. Summary of the Invention

[0004] The purpose of the present invention is to address the above problems existing in the prior art, aiming to solve the problem that bubbles affect the fuel supply of the fuel pump during high-frequency operation.

[0005] To achieve the above object, the present invention can be realized by the following technical solutions: A structure of a brushed gear pump, comprising:

[0006] A housing, one end of the housing is provided with an inlet cover, and the other end is provided with an outlet cover;

[0007] Wherein, a magnetic tile and a rotor that cooperate with each other are arranged between the inlet cover and the outlet cover, and a rotating shaft is arranged at the center of the rotor;

[0008] A pump oil disc, the pump oil disc is arranged on the inlet cover, and a turntable is arranged at the eccentric position of the pump oil disc. A pump oil groove is opened at the center of the turntable, and a toothed part that engages with the rotating shaft is arranged in the pump oil groove;

[0009] One end of the pump oil disc is provided with a stop disc that abuts against the turntable, and the other end is provided with a diversion disc that abuts against the inlet cover.

[0010] In an embodiment of the present invention, convex tooth parts are arranged in a circumferential array on the toothed part, and an arc part is arranged between two convex tooth parts. The convex tooth parts and the arc part cooperate with the pump oil groove.

[0011] In an embodiment of the present invention, a second arc oil port and a third arc oil port are respectively opened on the diversion disc, and the second arc oil port and the third arc oil port communicate with the turntable;

[0012] A first arc-shaped oil port communicating with the second arc-shaped oil port is formed on the oil inlet cover.

[0013] Wherein, the first arc-shaped oil port and the second arc-shaped oil port are oil inlet ports, while the third arc-shaped oil port is an oil outlet port.

[0014] In an embodiment of the present invention, an oil discharge groove and an oil transmission channel are formed on the oil inlet cover. The oil transmission channel communicates with the oil discharge groove and is located directly below the third arc-shaped oil port.

[0015] In an embodiment of the present invention, a pressure relief hole communicating with the oil transmission channel is formed on the oil inlet cover. A pressure relief valve is arranged at one end of the pressure relief hole, while a top plate is arranged at the other end. A spring for pushing against the pressure relief valve is arranged on the top plate.

[0016] In an embodiment of the present invention, a coupling block is arranged on the rotating shaft. Raised columns are arranged in a circumferential array on the coupling block, and the raised columns are engaged with the toothed part and the retaining disc.

[0017] In an embodiment of the present invention, a toothed gasket and an elastic pressing sheet are sequentially arranged on the retaining disc. Card holes are formed on the toothed gasket, the elastic pressing sheet, the retaining disc and the toothed part, and the card holes are engaged with the raised columns.

[0018] In an embodiment of the present invention, a filtering unit is arranged at the oil inlet end of the oil inlet cover. The filtering unit includes a chuck and a filter cover clamped on the chuck. A tubing ferrule is arranged at one end of the filter cover.

[0019] Wherein, a fixing disc is arranged inside the filter cover. A filter frame is clamped on the fixing disc. A scraping frame rotatably arranged on the filter frame and abutted against the outer wall of the filter frame is arranged on the filter frame. A linkage rod is arranged on the scraping frame, and the linkage rod is engaged with the rotating shaft.

[0020] In an embodiment of the present invention, a collection box is arranged on the fixing disc. A first opening and a second opening are formed on the collection box, and a blocking plate is arranged at the second opening.

[0021] The first opening faces the oil inlet cover, while the second opening faces the tubing ferrule.

[0022] In an embodiment of the present invention, an oil discharge flow channel is arranged between the chuck and the filter cover.

[0023] Compared with the prior art, the advantages of the present application are as follows: The rotor and the magnetic tile are used to rotate the rotating shaft. At the same time, the toothed part rotates within the turntable under the linkage of the rotating shaft, so as to form a negative pressure inside the casing. The fuel enters the fuel pumping groove of the turntable from the fuel inlet end. At this time, the air bubbles enter the high-pressure area with the toothed part and burst, thereby reducing the influence of the air bubbles on the output fuel. Description of the Drawings

[0024] Figure 1 is the schematic structural diagram of the overall fuel pump;

[0025] Figure 2 is the schematic overall structure diagram of the casing of the fuel pump after half-section and disassembly from the internal parts;

[0026] Figure 3 is the schematic assembly structure diagram of the fuel inlet cover and the fuel pumping disc;

[0027] Figure 4 is the exploded structural diagram of the parts of the fuel pumping disc located on the fuel inlet cover;

[0028] Figure 5 is the schematic exploded structure diagram of the partial section of the fuel inlet cover in the fuel pumping disc and other parts in the fuel pumping disc;

[0029] Figure 6 is the schematic plan view after the turntable and the toothed part in the fuel pumping disc are assembled;

[0030] Figure 7 is the schematic overall structure diagram of the fuel inlet cover and the filter unit assembled;

[0031] Figure 8 is the exploded structural diagram of the parts in the filter unit;

[0032] Figure 9 is the schematic half-section plan view after the parts in the filter unit are assembled;

[0033] Figure 10 is Figure 9 the enlarged view of part A in

[0034] Figure 11 is the schematic plan view of the overall half-section.

[0035] 1. Fuel inlet cover; 11. Fuel inlet end; 12. Oil delivery flow channel; 121. Oil discharge groove; 122. Oil guiding groove; 13. Pressure relief hole; 131. Spring; 132. Top disc; 133. Pressure relief valve; 14. First arc-shaped oil port;

[0036] 2. Casing; 21. Inner cylinder; 211. First limiting groove; 212. Second limiting groove;

[0037] 3. Oil outlet cover; 31. Electrode plate; 32. Oil outlet end; 33. First clamping block; 34. Second clamping block;

[0038] 4. Pump oil plate; 41. Third clamping block; 42. Elastic pressure plate; 43. Toothed gasket; 44. Baffle plate; 45. Clamping hole; 46. Rotating plate; 461. Pump oil groove; 47. Toothed member; 471. Protruding tooth portion; 472. Arc-shaped portion; 48. Drainage plate; 481. Second arc-shaped oil port; 482. Third arc-shaped oil port;

[0039] 5. Magnetic tile; 6. Rotor; 7. Rotating shaft; 71. Coupling block; 72. Protruding column;

[0040] 8. Filter unit; 80. Chuck; 81. Filter cover; 82. Oil unloading channel; 83. Oil pipe ferrule; 84. Fixed plate; 85. Filter frame; 851. Link rod; 86. Scrape rack; 87. Collecting box; 871. First opening; 872. Second opening; 873. Blocking plate. DETAILED DESCRIPTION

[0041] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention.

[0042] like Figures 1-11 As shown, a brush gear pump structure includes:

[0043] A casing 2, wherein an oil inlet cap 1 is disposed at one end of the casing 2 and an oil outlet cap 3 is disposed at the other end thereof;

[0044] Among them, a magnetic tile 5 and a rotor 6 that cooperate with each other are arranged between the oil inlet cover 1 and the oil outlet cover 3, and a rotating shaft 7 is arranged at the axis center of the rotor 6;

[0045] The oil pump pan 4 is arranged on the oil inlet cover 1, and a rotating disk 46 is arranged at an eccentric position of the oil pump pan 4, an oil pump groove 461 is opened at the axis of the rotating disk 46, and a toothed member 47 engaged with the rotating shaft 7 is arranged in the oil pump groove 461;

[0046] A baffle plate 44 abutting against a rotating plate 46 is arranged at one end of the oil pump pan 4, and a drainage plate 48 abutting against the oil inlet cover 1 is arranged at the other end thereof.

[0047] Specifically, the casing 2 is cylindrical to support the oil inlet cover 1 and the oil outlet cover 3. The oil inlet cover 1 is provided with an oil inlet end 11, and the oil outlet cover 3 is provided with an oil outlet end 32 and an electrode sheet 31. The oil inlet end 11 is used for externally connecting an oil pipe so that the fuel can be continuously and stably supplied to the engine through the fuel, and the motor sheet is externally connected with an electric wire to control the operation and stop of the rotor 6. When the engine is running, the fuel pump receives an electrical signal through the electrode sheet 31 to control the rotor 6 to rotate at the magnetic tile 5. At this time, the rotating shaft 7 in the rotor 6 drives the toothed part 47 to rotate. Since the turntable 46 is eccentrically fixed to the oil pump plate 4, the toothed part 47 rotates, which makes the gap between the pump oil groove 461 and the toothed part 47 change from large to small to form a negative pressure, thereby sucking the fuel in the fuel tank from the oil inlet cover 1 into the pump oil groove 461. Similarly, under the rotation of the toothed part 47, the fuel is squeezed to cause the bubbles in the fuel to burst, thereby improving the fuel supply effect.

[0048] Furthermore, the interior of the casing 2 is clamped with an internal cylinder 21, which serves as a limiter. A first limit groove 211 and a second limit groove 212 are provided on the internal cylinder 21, and a third clamping block 41 is provided on the oil pump pan 4 and a first clamping block 33 is provided on the oil outlet cover 3. The first clamping block 33 is engaged with the first limit groove 211, and the third clamping block 41 is engaged with the second limit groove 212. The internal cylinder 21 is used to position the oil pump pan 4 and the oil outlet cover 3 to limit the rotation of the oil pump pan 4 and the oil outlet cover 3. A second clamping block 34 is provided on the oil outlet cover 3, and the second clamping block 34 abuts against the magnetic tile 5 to improve the fixing effect of the magnetic tile 5. The above-mentioned limiting is to improve the stability of the overall operation of the fuel pump, reduce the shaking phenomenon of the fuel operation, and improve the fuel supply effect.

[0049] As a further embodiment of the present invention, the toothed member 47 is provided with convex teeth 471 in a circumferential array, an arc portion 472 is provided between two convex teeth 471 , and the convex teeth 471 and the arc portion 472 cooperate with the pump oil groove 461 .

[0050] Specifically, the circular array is a convex tooth portion 471 evenly distributed in a ring along the central axis of the toothed member 47, and an arc portion 472 is provided between two adjacent convex tooth portions 471, and the convex tooth portion 471 and the arc portion 472 cooperate with the pump oil groove 461. When the toothed member 47 rotates, the gap between the convex tooth portion 471 and the arc portion 472 and the pump oil groove 461 will change from large to small, thereby squeezing the fuel and increasing the output pressure of the fuel. At the same time, before the oil is filled, the rotation of the toothed member 47 causes a negative pressure to be generated inside the pump oil groove 461, thereby improving the absorption effect of the fuel in the fuel tank.

[0051] As an embodiment further provided by the present invention, a second arc-shaped oil port 481 and a third arc-shaped oil port 482 are respectively provided on the drain plate 48, the second arc-shaped oil port 481 and the third arc-shaped oil port 482 are connected to the turntable 46, and a first arc-shaped oil port 14 connected to the second arc-shaped oil port 481 is provided on the oil inlet cover 1, wherein the first arc-shaped oil port 14 and the second arc-shaped oil port 481 are oil inlets, and the third arc-shaped oil port 482 is an oil outlet.

[0052] Specifically, the first arc-shaped oil port 14 and the second arc-shaped oil port 481 have the same shape, and the fuel enters the pump oil groove 461 through the first arc-shaped oil port 14 and the second arc-shaped oil port 481. Under the rotation of the toothed member 47, the cavity where the fuel is located changes from large to small, so that the fuel is squeezed. Under this squeezing, the bubbles in the fuel will be broken, thereby improving the effect of outputting the fuel. The squeezed fuel will flow to the oil unloading groove 121 through the third arc-shaped oil port 482, and then flow from the oil delivery channel 12 along the oil unloading groove 121 to the oil outlet cover 3, and flow out from the oil outlet end 32 on the oil outlet cover 3 into the engine.

[0053] As a further embodiment of the present invention, an oil discharge groove 121 and an oil delivery channel are provided on the oil inlet cover 1 . The oil delivery channel is connected to the oil discharge groove 121 , and the oil delivery channel is located directly below the third arc-shaped oil port 482 .

[0054] Specifically, the oil unloading groove 121 is located directly below the third arc-shaped oil port 482 to receive the fuel with a certain oil pressure. Cavitation is likely to occur during this process. The oil unloading groove 121 can effectively alleviate the oil trapping phenomenon, avoid gas precipitation caused by a sudden drop in local pressure, reduce cavitation damage to parts and noise during fuel pump operation, and improve the output stability of the fuel pump. Further, Figure 4 An arc-shaped oil guide groove 122 is provided on one side of the oil unloading groove 121. The oil guide groove 122 reduces the instantaneous impact caused by cavitation of the fuel and causes local damage to the oil unloading groove 121. The oil guide groove 122 disperses the fuel and allows the fuel to enter the oil delivery channel 12 from another direction, thereby improving the fuel delivery effect.

[0055] As a further embodiment of the present invention, a pressure relief hole 13 connected to the oil delivery channel is provided on the oil inlet cover 1, a pressure relief valve 133 is provided at one end of the pressure relief hole 13, and a top plate 132 is provided at the other end thereof, and a spring 131 is provided on the top plate 132 for pushing the pressure relief valve 133.

[0056] Specifically, when the oil pressure inside the casing 2 is too high, the fuel with a certain pressure will push against the pressure relief valve 133 from the pressure relief hole 13 at this time, so that the pressure relief valve 133 squeezes the spring 131, causing the pressure relief hole 13 to be in an open state, discharging the fuel, thereby reducing the oil pressure inside the fuel pump, keeping the oil pressure within a suitable range, maintaining the stability of the oil pressure, and improving the fuel supply effect to the engine.

[0057] As an embodiment further provided by the present invention, a coupling block 71 is provided on the rotating shaft 7, and protruding columns 72 are arranged in a circumferential array on the coupling block 71, and the protruding columns 72 are engaged with the toothed part 47 and the retaining disc 44.

[0058] Specifically, with the central axis of the coupling block 71 as a reference, multiple groups of protruding columns 72 are evenly distributed in a ring along the central axis. There are at least six groups of protruding columns 72. By engaging the protruding columns 72 with the toothed part 47, the toothed part 47 is driven to rotate within the oil pumping groove 461. The protruding columns 72 link the rotating shaft 7 with the toothed part 47, improving the rotational stability of the toothed part 47.

[0059] As an embodiment further provided by the present invention, a toothed gasket 43 and an elastic pressing piece 42 are sequentially arranged on the retaining disc 44. Card holes 45 are opened on the toothed gasket 43, the elastic pressing piece 42, the retaining disc 44 and the toothed part 47, and the card holes 45 are engaged with the protruding columns 72.

[0060] Specifically, the retaining disc 44 is circular, and the diameter of the circle is greater than the diameter of the oil pumping groove 461. The retaining disc 44 covers the rotating disc 46 to block the upper surface of the oil pumping groove 461. Then, the toothed gasket 43 and the elastic pressing piece 42 are sequentially assembled onto the retaining disc 44. Subsequently, the coupling block 71 passes through the elastic pressing piece 42, the toothed gasket 43, the retaining disc 44 and the toothed part 47 from top to bottom through the protruding columns 72, thereby improving the connection effect between the retaining disc 44 and the rotating disc 46. At the same time, by driving the rotation of the toothed part 47 by the coupling block 71, a negative pressure is generated in the oil pumping groove 461, improving the rotation effect of the toothed part 47.

[0061] As an embodiment further provided by the present invention, a filtering unit 8 is provided on the oil inlet end 11 of the oil inlet cover 1. The filtering unit 8 includes a chuck 80 and a filter cover 81 clamped on the chuck 80. One end of the filter cover 81 is provided with a tubing ferrule 83;

[0062] Among them, a fixed disc 84 is arranged inside the filter cover 81. A filter frame 85 is clamped on the fixed disc 84. A scraping frame 86 in contact with the outer wall of the filter frame 85 is rotatably arranged on the filter frame 85. A linkage rod 851 is arranged on the scraping frame 86, and the linkage rod 851 is engaged with the rotating shaft 7.

[0063] Specifically, a scraping plate is provided on the scraping frame 86. The scraping plate is made of rubber. When the fuel pump is operating, the rotating shaft 7 rotates with the rotor 6. At this time, the linkage rod 851 drives the scraping frame 86 to rotate on the filter frame 85, so that the scraping plate continuously contacts the outer wall of the filter frame 85, reducing the phenomenon of impurities adhering to the fuel, and improving the smoothness of fuel supply. Among them, the fixed disk 84 is fixed to the filter cover 81 by bolts, and the filter frame 85 is snap-fitted to the filter cover 81. After the fuel pump has been used for a long time, impurities will block the outer walls of the collection box 87 and the filter frame 85. At this time, the filter frame 85 and the collection box 87 can be removed for cleaning.

[0064] As a further embodiment provided by the present invention, a collection box 87 is provided on the fixed disk 84. The collection box 87 is provided with a first opening 871 and a second opening 872. A blocking plate 873 is provided at the second opening 872. The first opening 871 faces the fuel inlet cover 1, and the second opening 872 faces the tubing ferrule 83.

[0065] Specifically, the number of the first openings 871 and the second openings 872 is the same. Since the collection box 87 is annular, the first openings 871 and the second openings 872 are evenly distributed in multiple groups along the central axis of the collection box 87, and the number of the first openings 871 and the second openings 872 is at least six groups. When the fuel pump is operating, the pump oil disk 4 forms a negative pressure under the drive of the toothed member 47, sucking the fuel from the tubing ferrule 83 into the filter cover 81. At this time, the fuel will carry the impurities scraped off the filter frame 85 and enter the collection box 87 through the second opening 872 for storage, reducing the blockage of the filter frame 85 by fuel impurities, improving the flow rate of the fuel entering the fuel pump, and further reducing the generation of bubbles. Among them, the blocking plate 873 plays a limiting role to reduce the backflow of impurities into the filter cover 81. Further, a mesh filter screen is provided at the first opening 871.

[0066] As a further embodiment provided by the present invention, an oil discharge channel 82 is provided between the chuck 80 and the filter cover 81. The oil discharge channel 82 is located at the circumference of the chuck 80 and the filter cover 81, offset from the center to not hinder the flow of fuel.

[0067] Specifically, the oil discharge channel 82 is communicated with the pressure relief hole 13 on the fuel inlet cover. When the actual required fuel quantity is supplied to the engine at a certain pressure, the excess fuel will flow back to the pressure relief hole 13, and then flow to the oil discharge channel 82 along the pressure relief hole 13. The oil discharge channel 82 is provided with a tubing connection joint, and the returned fuel is discharged through the tubing to a place far from the fuel inlet pipe through this joint, reducing the phenomenon that the fuel generates air bubbles during the liquid discharge process and is directly sucked into the fuel inlet pipe by the fuel inlet pipe, improving the fuel supply effect of the fuel pump.

[0068] In the above technical solution of the present invention, in view of the technical problem that the prior art solution is too single, a solution significantly different from the prior art is provided. For the parts not involved in the technical solution of the present application, they are the same as the prior art or can be implemented by using the prior art, and will not be elaborated here.

[0069] The technical solutions in the above embodiments have clearly and completely described the content of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

Claims

1. A structure of a brushed gear pump, characterized in that, Comprising: A housing (2), an oil inlet cover (1) is provided at one end of the housing (2), and an oil outlet cover (3) is provided at the other end thereof; Wherein, a mutually cooperating magnetic tile (5) and a rotor (6) are provided between the oil inlet cover (1) and the oil outlet cover (3), and a rotating shaft (7) is provided at the axis of the rotor (6); An oil pumping disc (4), the oil pumping disc (4) is provided on the oil inlet cover (1), and a turntable (46) is provided at the eccentric position of the oil pumping disc (4), an oil pumping groove (461) is opened at the axis of the turntable (46), and a toothed member (47) engaged with the rotating shaft (7) is provided in the oil pumping groove (461); One end of the oil pumping disc (4) is provided with a stop disc (44) abutting against the turntable (46), and a drainage disc (48) abutting against the oil inlet cover (1) is provided at the other end thereof.

2. The structure of a brushed gear pump according to claim 1, characterized in that Convex tooth portions (471) are arranged in a circumferential array on the toothed member (47), an arc portion (472) is provided between two convex tooth portions (471), and the convex tooth portions (471) and the arc portion (472) cooperate with the oil pumping groove (461).

3. The structure of a brushed gear pump according to claim 1, characterized in that, Second arc-shaped oil ports (481) and third arc-shaped oil ports (482) are respectively opened on the drainage disc (48), and the second arc-shaped oil ports (481) and the third arc-shaped oil ports (482) communicate with the turntable (46); A first arc-shaped oil port (14) communicating with the second arc-shaped oil port (481) is opened on the oil inlet cover (1); Wherein, the first arc-shaped oil port (14) and the second arc-shaped oil port (481) are oil inlets, and the third arc-shaped oil port (482) is an oil outlet.

4. A structure of a brushed gear pump according to claim 3, characterized in that, An oil discharge groove (121) and an oil transmission channel are opened on the oil inlet cover (1), the oil transmission channel is communicated with the oil discharge groove (121), and the oil transmission channel is located directly below the third arc-shaped oil port (482).

5. The structure of a brushed gear pump according to claim 4, characterized in that, A pressure relief hole (13) communicating with the oil transmission channel is opened on the oil inlet cover (1), a pressure relief valve (133) is provided at one end of the pressure relief hole (13), and a top disc (132) is provided at the other end thereof, and a spring (131) pushing against the pressure relief valve (133) is provided on the top disc (132).

6. The brush-type gear pump structure according to claim 1, characterized in that, A coupling block (71) is provided on the rotating shaft (7), protruding columns (72) are arranged in a circumferential array on the coupling block (71), and the protruding columns (72) are engaged with the toothed member (47) and the stop disc (44).

7. The structure of a brushed gear pump according to claim 6, characterized in that, A toothed gasket (43) and an elastic pressing sheet (42) are sequentially provided on the stop disc (44), and clamping holes (45) are opened on the toothed gasket (43), the elastic pressing sheet (42), the stop disc (44) and the toothed member (47), and the clamping holes (45) are engaged with the protruding columns (72).

8. A structure of a brushed gear pump according to claim 1, characterized in that, A filtering unit (8) is provided at the oil inlet end of the oil inlet cover (1), the filtering unit (8) includes a chuck (80) and a filter cover (81) clamped on the chuck (80), and an oil pipe ferrule (83) is provided at one end of the filter cover (81); Among them, a fixed disk (84) is arranged inside the filter cover (81), a filter frame (85) is clamped on the fixed disk (84), a scraping frame (86) which abuts against the outer wall of the filter frame (85) is rotatably arranged on the filter frame (85), a linkage rod (851) is arranged on the scraping frame (86), and the linkage rod (851) is engaged with the rotating shaft (7).

9. A structure of a brushed gear pump according to claim 8, wherein, A collection box (87) is arranged on the fixed disk (84), a first opening (871) and a second opening (872) are formed in the collection box (87), and a blocking plate (873) is arranged at the second opening (872); The first opening (871) faces the oil inlet cover (1), while the second opening (872) faces the tubing ferrule (83).

10. A structure of a brushed gear pump according to claim 8, characterized in that, An oil discharge flow channel (82) is arranged between the chuck (80) and the filter cover (81).

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