A gear type oil pump

Abstract

The present invention discloses a gear type oil pump, comprising a gear type oil pump body, the oil outlet of the gear type oil pump body is fixedly connected to a liquid outlet pipe, the cavity of the liquid inlet pipe is slidably connected to a filter screen for filtering the oil passing through the liquid inlet pipe cavity, the center of the filter screen is penetrated and fixedly connected to a movable sleeve 1, one end of the movable sleeve 1 close to the gear type oil pump body is rotationally connected to a movable sleeve 2, the top of the movable sleeve 2 is fixedly connected to a tension spring 1, the top of the tension spring 1 is fixedly connected to the top of the inner wall of the liquid inlet pipe, and the oil inlet of the gear type oil pump body is fixedly connected to the liquid inlet pipe. The present invention, through the coordinated use of the above structures, solves the problem that in actual use, the traditional filter screen will be immersed in the oil after filtering, which will aggravate the pollution of the oil and bring inconvenience to use.

Description

Technical Field

[0001] The invention relates to the technical field of oil pumps, in particular to a gear type oil pump. Background Art

[0002] The gear pump is a pump used to transport oil. The pump body has a pair of meshing gears, one is the driving gear and the other is the driven gear. Due to the meshing of the two gears, the working chamber of the pump is divided into two independent parts, one side is the suction chamber and the other side is the discharge chamber; when the gear oil pump is working, the driving gear rotates the driven gear, and when the gears are meshed and disengaged, a partial vacuum is formed on the suction side, and the liquid is sucked in. The liquid fills the gears and is brought to the discharge side. When the gears come into mesh, the liquid is compressed to form a high-pressure liquid and is discharged from the pump through the discharge port of the pump;

[0003] However, during the use of gear pumps, due to its large wear, wear impurities often appear in the closed circulation oil circuit, or the service life of the gear pump is reduced due to oil pollution problems. Filters are often installed in gear pumps to reduce impurities and oil pollution from entering the oil circuit and extend the service life of the equipment.

[0004] After filtering, the traditional filter will remain immersed in the oil, which will aggravate the pollution of the oil and bring inconvenience to use. Summary of the invention

[0005] The object of the present invention is to provide a gear type oil pump, which has the advantages of making the filter screen separate from the continuous contact with the oil after the gear pump stops running and avoiding oil contamination, thereby solving the problems in the background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a gear oil pump, comprising a gear oil pump body, the oil outlet of the gear oil pump body is fixedly connected to a liquid outlet pipe, and the oil inlet of the gear oil pump body is fixedly connected to a liquid inlet pipe;

[0007] The cavity of the liquid inlet pipe is slidably connected with a filter screen for filtering the oil passing through the liquid inlet pipe cavity, the center of the filter screen is penetrated and fixedly connected with a movable sleeve 1, one end of the movable sleeve 1 close to the gear type oil pump body is rotationally connected with a movable sleeve 2, the top of the movable sleeve 2 is fixedly connected with a tension spring 1, the top of the tension spring 1 is fixedly connected to the top of the inner wall of the liquid inlet pipe, and the center of the movable sleeve 2 facing one end of the gear type oil pump body is penetrated and A pressure column is fixedly connected axially, and two sliding rods are fixedly connected to one end of the movable sleeve facing the gear oil pump body, which can slide up and down the inner wall of the liquid inlet pipe. A pulling belt is fixedly connected to the lower surface of the pressure column, and a truncated cone-shaped sealing plug is fixedly connected to the bottom of the pulling belt, which can slide horizontally in the liquid inlet pipe cavity. A sealing plug block that matches the outer contour of the truncated cone-shaped sealing plug is fixedly connected to the inner wall of the liquid inlet pipe, and a ferrule fixed to the inner wall of the liquid inlet pipe is provided directly below the filter.

[0008] Preferably, the filter screen is provided with a blocking device, the blocking device includes a second ferrule which is limitedly slidably connected to the arc-shaped profile at the top of the filter screen, the second ferrule is fixedly connected to a connecting arm located at the top of the movable sleeve second on the side facing the gear type oil pump body, the top of the second ferrule is fixedly connected to an elastic folding plate, the top of the elastic folding plate is fixedly connected to the top of the inner wall of the liquid inlet pipe, and the inner wall of the liquid inlet pipe away from the gear type oil pump body is fixedly connected to an inclined block 1 which guides the oil in the liquid inlet pipe downward.

[0009] Preferably, the filter screen is provided with a driving device for driving the filter screen to rotate relative to the movable sleeve 2, and the inner wall of the liquid inlet pipe is fixedly connected with a scraper for scraping and collecting impurities filtered on the surface of the filter screen after the filter screen rotates, and the surface of the liquid inlet pipe facing the scraper is penetrated and detachably installed with a sealing plug.

[0010] Preferably, the driving device includes a compression spring which is sleeved on the outer contour of the pressure column and is simultaneously located in the movable sleeve two, an end of the compression spring away from the movable sleeve two is movably connected to an end of the movable sleeve one close to the gear-type oil pump body, an end of the pressure column away from the gear-type oil pump body passes through the movable sleeve one and is fixedly connected to a connecting column located in the movable sleeve one, a second ramp block and a third ramp block which cooperate with each other are fixedly connected to the arc-shaped contour of the connecting column, axially fixed clamping strips are evenly distributed on the inner wall of the movable sleeve one, the clamping strips on the inner wall of the movable sleeve one are respectively matched with the ramps on the ramp blocks two and three, and a protrusion which slides with the end of the pressure column is fixedly connected to the inner wall of the liquid inlet pipe.

[0011] Preferably, the movable sleeve 1 is provided with a pushing device for further centralized processing of impurities scraped on the scraper, and the pushing device includes a rotating ring coaxially fixed on the filter screen on the side away from the gear oil pump body, and the outer contour upper limit rotation connection of the movable sleeve 1 at one end away from the gear oil pump body is connected with the movable sleeve 3, and the end of the movable sleeve 3 away from the gear oil pump body is fixedly connected with a connecting frame, and the side of the connecting frame away from the gear oil pump body is connected to the upper and lower limit sliding connection of the inner wall of the liquid inlet pipe;

[0012] The movable sleeve three is connected with a T-shaped bracket in a radial limited sliding manner on a side away from the gear oil pump body, the T-shaped bracket is provided with a movable through groove, the inner wall of the movable through groove is connected with a rotating arm in a fixed axis rotation, the rotating arm is fixedly connected with a transmission column on the side away from the rotating ring, and the transmission column is fixedly connected with a triangular block at one end away from the rotating arm, the end of the T-shaped bracket is penetrated and axially slidably connected with a plug rod, one end of the plug rod is slidably connected to the inclined surface on the triangular block, and the other end of the plug rod is fixedly connected to a connecting disk, and a tension spring 2 is sleeved on the arc profile of the plug rod, and the two ends of the tension spring 2 are fixedly connected to the connecting disk and the opposite surfaces of the T-shaped bracket.

[0013] Preferably, the pushing device also includes two symmetrical guide rods fixedly connected to one side of the rotating arm close to the movable sleeve three, and two spiral grooves symmetrical to each other are opened on the side of the rotating ring close to the movable sleeve three, and the ends of the two guide rods away from the rotating arm are slidingly connected to the inner walls of the corresponding spiral grooves, and the inner walls of the spiral grooves close to the edge of the rotating ring are fixedly connected with a lifting block for guiding the rotating arm to rotate in the movable through groove, and the end of the rotating arm close to the scraper is fixedly connected with a pushing frame for further concentrating impurities collected after scraping the upper surface of the scraper.

[0014] Preferably, an elastic slide bar is fixedly connected to a side of the connecting plate away from the gear type oil pump body, and an end of the elastic slide bar away from the T-shaped bracket is horizontally limited and slidably connected to the inner wall of the connecting frame.

[0015] Preferably, a guide column is fixedly connected to the inner wall of the liquid inlet pipe, and the outer contour of the guide column is slidably connected to the surface of the pulling belt.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. After the gear-type oil pump body is powered on, when the present invention starts working, the oil will enter the gear-type oil pump body through the liquid inlet pipe, and finally be discharged outward from the liquid outlet pipe;

[0018] 2. When the oil passes through the liquid inlet pipe, the oil can be filtered through the filter screen arranged in the liquid inlet pipe. The filter screen is made of stainless steel and is durable. The filter screen is driven by the movable sleeve 1 to rotate synchronously in the liquid inlet pipe. The power source of the rotation of the movable sleeve 1 will be introduced in the following text. The rotation of the movable sleeve 1 is supported by the movable sleeve 2, and the end of the movable sleeve 2 is supported by the pressure column and the sliding rod. The end of the sliding rod away from the movable sleeve 2 is slid up and down on the inner wall of the liquid inlet pipe, so that the lifting and lowering of the filter screen as a whole in the liquid inlet pipe can be smoothly realized.

[0019] 3. When the gear type oil pump body starts to operate, a huge suction force is generated on one end of the inlet pipe close to the gear type oil pump body, so that the truncated cone-shaped sealing plug is sucked and moves toward the gear type oil pump body, thereby opening the oil path between the inlet pipe and the gear type oil pump body; through the transmission of the pulling belt, the pressure column, the movable sleeve 2, the movable sleeve 1 and the filter screen are pulled downward in the inlet pipe, so that the filter screen enters the lower space of the inlet pipe, so that the filter screen can smoothly filter the oil passing through, and once the gear type oil pump body stops operating, the suction force on the truncated cone-shaped sealing plug in the gear type oil pump body is released, and under the elastic force of the tension spring 1, the movable sleeve 2 brings the movable sleeve 1 and the filter screen to move upward quickly, so that the filter screen is separated from the oil in the inlet pipe, so as to prevent the impurities filtered on the filter screen from continuing to pollute the oil.

[0020] 4. Through the setting of the card sleeve 1, after the filter screen moves down to the lowest point, it can be engaged with the filter screen to avoid gaps at the corners between the filter screen and the inner wall of the liquid inlet pipe, so that the liquid flows out without being filtered.

[0021] 5. The coordinated use of the above structures solves the problem that in actual use, the traditional filter screen will be immersed in oil after filtering, which will aggravate the pollution of the oil and bring inconvenience to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a three-dimensional diagram of the liquid inlet pipe of the present invention;

[0023] Figure 2 A three-dimensional diagram of the internal structure of the liquid inlet pipe of the present invention;

[0024] Figure 3 is a three-dimensional diagram of the filter screen of the present invention;

[0025] Figure 4 It is a three-dimensional diagram of the inclined plane block 2 of the present invention;

[0026] Figure 5 is a three-dimensional diagram of the spiral groove of the present invention;

[0027] Figure 6 A three-dimensional diagram of the card strip of the present invention;

[0028] Figure 7 For the present invention Figure 5 A magnified view of the structure at center A;

[0029] Figure 8 It is a three-dimensional diagram of a movable sleeve 1 of the present invention.

[0030] In the figure: 1, gear type oil pump body; 2, liquid outlet pipe; 3, liquid inlet pipe; 4, filter screen; 5, movable sleeve 1; 6, movable sleeve 2; 61, tension spring 1; 7, pressure column; 8, sliding rod; 9, pulling belt; 10, truncated cone sealing plug; 11, sealing plug block; 12, ferrule 1; 13, ferrule 2; 15, elastic folding plate; 16, inclined block 1; 17, scraper; 18, sealing plug; 19, pressure spring; 20, connecting column ; 21. Inclined block two; 22. Inclined block three; 23. Clip strip; 24. Rotating ring; 25. Movable sleeve three; 26. Connecting frame; 27. T-shaped bracket; 28. Movable through groove; 29. ​​Rotating arm; 30. Transmission column; 31. Triangular block; 32. Insert rod; 33. Connecting plate; 34. Tension spring two; 35. Guide rod; 36. Spiral groove; 37. Lifting block; 38. Push frame; 39. Elastic slide rod; 40. Guide column. DETAILED DESCRIPTION

[0031] 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.

[0032] Embodiment 1:

[0033] The present invention provides a technical solution: a gear oil pump, comprising a gear oil pump body 1, wherein the model of the gear oil pump body 1 in this solution is specifically 2CY-1.08, the oil outlet of the gear oil pump body 1 is fixedly connected with a liquid outlet pipe 2, and the oil inlet of the gear oil pump body 1 is fixedly connected with a liquid inlet pipe 3;

[0034] The cavity of the liquid inlet pipe 3 is connected with a filter screen 4 for filtering the oil passing through the cavity of the liquid inlet pipe 3 in an upper and lower limit sliding manner. The center of the filter screen 4 is penetrated and fixedly connected with a movable sleeve 1 5. The movable sleeve 1 5 is connected with a movable sleeve 2 6 at one end thereof close to the gear type oil pump body 1 in a limit rotation manner. The top of the movable sleeve 2 6 is fixedly connected with a tension spring 1 61. The top of the tension spring 1 61 is fixedly connected to the top of the inner wall of the liquid inlet pipe 3. The center of the movable sleeve 2 6 facing one end of the gear type oil pump body 1 is penetrated and axially fixed. A pressure column 7 is fixedly connected, and two sliding rods 8 that slide up and down the inner wall of the liquid inlet pipe 3 are fixedly connected on the end of the movable sleeve 6 facing the gear-type oil pump body 1. A pulling belt 9 is fixedly connected to the lower surface of the pressure column 7, and a truncated cone-shaped sealing plug 10 that slides horizontally in the cavity of the liquid inlet pipe 3 is fixedly connected to the bottom of the pulling belt 9. A sealing plug block 11 that matches the outer contour of the truncated cone-shaped sealing plug 10 is fixedly connected to the inner wall of the liquid inlet pipe 3, and a clamping sleeve 12 fixed on the inner wall of the liquid inlet pipe 3 is provided directly below the filter screen 4.

[0035] refer to Figure 1 , Figure 2 and Figure 3 The working principle of the first embodiment: when the gear type oil pump body 1 is powered on and starts working, the oil will enter the gear type oil pump body 1 through the liquid inlet pipe 3, and finally be discharged outward from the liquid outlet pipe 2.

[0036] When the oil passes through the liquid inlet pipe 3, the oil can be filtered by the filter screen 4 arranged in the liquid inlet pipe 3. The filter screen 4 is made of stainless steel and is durable. The filter screen 4 is driven by the movable sleeve 1 5 to rotate synchronously in the liquid inlet pipe 3. The power source of the rotation of the movable sleeve 1 5 will be introduced in the following text. The rotation of the movable sleeve 1 5 is supported by the movable sleeve 2 6, and the end of the movable sleeve 2 6 is supported by the pressure column 7 and the sliding rod 8. The end of the sliding rod 8 away from the movable sleeve 2 6 slides up and down on the inner wall of the liquid inlet pipe 3, so that the filter screen 4 can be smoothly lifted and lowered as a whole in the liquid inlet pipe 3. After the gear type oil pump body 1 starts to run, a huge suction force will be generated on the end of the liquid inlet pipe 3 close to the gear type oil pump body 1, so that the round table The truncated cone-shaped sealing plug 10 is sucked and moved toward the gear type oil pump body 1, thereby opening the oil path between the liquid inlet pipe 3 and the gear type oil pump body 1; through the transmission of the pulling belt 9, the pressure column 7, the movable sleeve 2 6, the movable sleeve 1 5 and the filter screen 4 are pulled downward in the liquid inlet pipe 3, so that the filter screen 4 enters the lower space of the liquid inlet pipe 3, so that the filter screen 4 can smoothly filter the oil passing through, and once the gear type oil pump body 1 stops operating, the suction force on the truncated cone-shaped sealing plug 10 in the gear type oil pump body 1 is released, and under the elastic force of the tension spring 1 61, the movable sleeve 2 6 brings the movable sleeve 1 5 and the filter screen 4 to move upward quickly, so that the filter screen 4 is separated from the oil in the liquid inlet pipe 3, so as to prevent the impurities filtered on the filter screen 4 from continuing to contaminate the oil. Through the setting of the clamping sleeve 12, after the filter screen 4 moves down to the lowest point, it can be engaged with the filter screen 4 to avoid gaps at the corners between the filter screen 4 and the inner wall of the liquid inlet pipe 3, so that the liquid flows out without being filtered.

[0037] Embodiment 2 is basically the same as embodiment 1, and furthermore: a blocking device is provided on the filter screen 4, the blocking device includes a second ferrule 13 which is limitedly slidably connected to the arc-shaped contour at the top of the filter screen 4, the second ferrule 13 is fixedly connected to a connecting arm located at the top of the movable sleeve 6 on the side facing the gear type oil pump body 1, the top of the second ferrule 13 is fixedly connected to an elastic folding plate 15, the top of the elastic folding plate 15 is fixedly connected to the top of the inner wall of the liquid inlet pipe 3, and the inner wall of the liquid inlet pipe 3 away from the gear type oil pump body 1 is fixedly connected to an inclined block 16 which guides the oil in the liquid inlet pipe 3 downward.

[0038] refer to Figure 1 , Figure 2 and Figure 3 .

[0039] Working principle of the second embodiment: by setting the connecting arm, the second ferrule 13 can be raised and lowered synchronously with the second movable sleeve 6 and the filter 4, so that the inner wall of the second ferrule 13 can keep in continuous contact with the arc-shaped contour at the top of the filter 4, and the upper space where the filter 4 is located is separated by the second ferrule 13 and the elastic folding plate 15; the oil is prevented from entering the gear-type oil pump body 1 through the space above the filter 4, so that the oil passes through the mesh on the filter 4 and then enters the gear-type oil pump body 1. The elastic folding plate 15 has a folding and unfolding effect, which can cope with the vacancy generated after the filter 4 moves downward and continue to maintain the sealing effect.

[0040] Furthermore, a driving device is provided on the filter screen 4 for driving the filter screen 4 to rotate relative to the movable sleeve 6, and a scraper 17 is fixedly connected to the inner wall of the liquid inlet pipe 3 for scraping and collecting impurities filtered on the surface of the filter screen 4 after the filter screen 4 rotates. A sealing plug 18 is penetrated and detachably installed on the surface of the liquid inlet pipe 3 facing the scraper 17.

[0041] refer to Figure 3 and Figure 4 After the gear type oil pump body 1 stops running, the sealing plug 18 is removed from the liquid inlet pipe 3, and the impurities accumulated on the scraper 17 are centrally cleaned and transferred; in this solution, the sealing plug 18 is fixed to the liquid inlet pipe 3 by bolts; and because the scraper 17 is fixed to the inner wall of the liquid inlet pipe 3, along with the rotation of the filter screen 4, it will generate relative rotation with the scraper 17, and then the impurities on the filter screen 4 will be scraped and removed by the scraper 17.

[0042] Embodiment 3 is basically the same as embodiment 2, and furthermore: the driving device includes a compression spring 19 which is sleeved on the outer contour of the pressure column 7 and is simultaneously located in the movable sleeve 2 6, and the end of the compression spring 19 away from the movable sleeve 2 6 is movably connected to the end of the movable sleeve 1 5 close to the gear-type oil pump body 1, and the end of the pressure column 7 away from the gear-type oil pump body 1 passes through the movable sleeve 1 5 and is fixedly connected to a connecting column 20 located in the movable sleeve 1 5, and the arc-shaped contour of the connecting column 20 is fixedly connected with a bevel block 21 and a bevel block 3 22 which cooperate with each other, and the inner wall of the movable sleeve 1 5 is evenly distributed with axially fixed clamping strips 23, and the clamping strips 23 on the inner wall of the movable sleeve 1 5 are respectively matched with the bevels on the bevel blocks 21 and 3 22 for transmission, and the inner wall of the liquid inlet pipe 3 is fixedly connected with a protrusion which slides with the end of the pressure column 7.

[0043] refer to Figure 3 and Figure 4 .

[0044] Working principle of the third embodiment: by setting the compression spring 19, the axial spacing between the movable sleeve 2 6 and the movable sleeve 1 5 is maintained, and when the pressure column 7 moves downward along with the movable sleeve 2 6, it will contact and squeeze the protrusions set on the inner wall of the liquid inlet pipe 3, so that the pressure column 7 and the movable sleeve 2 6 approach the movable sleeve 1 5 after overcoming the elastic force of the compression spring 19, and the rotation support of the movable sleeve 1 5 will be further supplemented in the following text;

[0045] Once the pressure column 7 resumes its upward movement along with the movable sleeve 2 6 under the elastic force of the tension spring 1 61 , the contact with the protrusion on the inner wall of the liquid inlet pipe 3 is immediately released, and under the elastic force of the compression spring 19 , the movable sleeve 2 6 moves the pressure column 7 away from the movable sleeve 1 5 .

[0046] Driven by the axial reciprocating movement of the pressure column 7 in the above content, the connecting column 20 synchronously performs axial reciprocating movement in the movable sleeve 5, and the inclined surface block 21 and the inclined surface block 3 22 on the outer contour of the connecting column 20 smoothly contact and push the multiple evenly distributed movable sleeves 3 25 on the inner wall of the movable sleeve 5 one by one, so that the movable sleeve 5 is smoothly deflected, thereby realizing the rotation of the movable sleeve 5 and the filter screen 4 in the liquid inlet pipe 3, and the impurities on the filter screen 4 are scraped off through the rotation in coordination with the inclined surface block 16 mentioned above, and the scraped impurities and oil stains will be concentrated on the upper surface of the scraper 17.

[0047] Embodiment 4 is basically the same as Embodiment 3, and furthermore, a pushing device is provided on the movable sleeve 15 for further centralized processing of impurities scraped from the scraper 17, and the pushing device includes a rotating ring 24 coaxially fixed on the filter screen 4 on the side away from the gear type oil pump body 1, and the outer contour upper limit rotation connection of the movable sleeve 15 on the end away from the gear type oil pump body 1 is connected with the movable sleeve 3 25, and the end of the movable sleeve 3 25 away from the gear type oil pump body 1 is fixedly connected with a connecting frame 26, and the side of the connecting frame 26 away from the gear type oil pump body 1 is connected to the inner wall of the liquid inlet pipe 3 in an upper and lower limit sliding connection;

[0048] A T-shaped bracket 27 is radially limited and slidably connected to the side of the movable sleeve 3 25 away from the gear oil pump body 1, and a movable through groove 28 is opened on the T-shaped bracket 27. The inner wall of the movable through groove 28 is axially rotatably connected to a rotating arm 29. A transmission column 30 is fixedly connected to the side of the rotating arm 29 away from the rotating ring 24, and a triangular block 31 is fixedly connected to the end of the transmission column 30 away from the rotating arm 29. An insertion rod 32 is penetrated and axially slidably connected at the end of the T-shaped bracket 27, one end of the insertion rod 32 is slidably connected to the inclined surface on the triangular block 31, and the other end of the insertion rod 32 is fixedly connected to a connecting disk 33. A tension spring 2 34 is sleeved on the arc profile of the insertion rod 32, and the two ends of the tension spring 2 34 are fixedly connected to the connecting disk 33 and the opposite surfaces of the T-shaped bracket 27.

[0049] Furthermore, the pushing device also includes two symmetrical guide rods 35 fixedly connected to one side of the rotating arm 29 near the movable sleeve three 25, and two spiral grooves 36 symmetrical to each other are opened on the side of the rotating ring 24 near the movable sleeve three 25. The ends of the two guide rods 35 away from the rotating arm 29 are slidably connected to the inner walls of the corresponding spiral grooves 36. The inner walls of the spiral grooves 36 near the edges of the rotating ring 24 are fixedly connected with a lifting block 37 for guiding the rotating arm 29 to rotate in the movable through groove 28. The end of the rotating arm 29 near the scraper 17 is fixedly connected with a pushing frame 38 for further concentrating impurities collected after scraping the upper surface of the scraper 17.

[0050] refer to Figure 4 and Figure 5 .

[0051] Working principle of the fourth embodiment: First, the ultimate goal is to achieve centralized collection of impurities on the scraper 17 by pushing the push frame 38 on the upper surface of the scraper 17.

[0052] Specifically, the filter screen 4 drives the rotating ring 24 to rotate synchronously, such as Figure 5 As shown in the figure, one of the guide rods 35 is sliding in the inner wall of the spiral groove 36, and since the T-shaped bracket 27 as a whole can only perform radial limited sliding on the end of the movable sleeve 3 25, the spiral groove 36 after rotation will slide relative to the end of the guide rod 35, and under the guidance of the spiral track on the spiral groove 36, the guide rod 35 smoothly brings the rotating arm 29, the T-shaped bracket 27 and the movable through groove 28 to gradually move horizontally toward the scraper 17, thereby achieving the above-mentioned impurity concentration effect;

[0053] Once the guide rod 35 rotates to the lifting block 37 on the end of the spiral groove 36, the spiral groove 36 is propped up from the spiral groove 36 under the guidance of the lifting block 37, so that the rotating arm 29 deflects in the opposite direction in the movable through groove 28, and the triangular block 31 rotates synchronously through the transmission of the transmission column 30. Through the elastic force of the tension spring 24, the end of the insertion rod 32 always keeps in close contact with the inclined surface of the triangular block 31, and always limits the angle of lateral deflection of the triangular block 31.

[0054] Through the deflection of the rotating arm 29 in the upper section, the guide rod 35 on the rotating arm 29 away from the scraper 17 enters into the inner wall of another spiral groove 36, so that the T-shaped bracket 27 and other structures move horizontally in the direction away from the scraper 17. Through this operation, the contact with the impurities on the scraper 17 is broken, and the unilateral push of the impurities on the scraper 17 is achieved.

[0055] Furthermore, an elastic slide bar 39 is fixedly connected to one side of the connecting plate 33 away from the gear type oil pump body 1 , and one end of the elastic slide bar 39 away from the T-shaped bracket 27 is horizontally limited and slidably connected to the inner wall of the connecting frame 26 .

[0056] refer to Figure 5 By setting the elastic slide bar 39, the horizontal radial limited sliding of the T-shaped bracket 27 on the movable sleeve three 25 can be further limited. When the insertion rod 32 is squeezed and moves axially in the direction away from the movable sleeve three 25, the elastic slide bar 39 itself is elastically deformed to maintain the limited sliding of the elastic slide bar 39 on the inner wall of the connecting frame 26.

[0057] Furthermore, a guide column 40 is fixedly connected to the inner wall of the liquid inlet pipe 3 , and the outer contour of the guide column 40 is slidably connected to the surface of the pulling belt 9 .

[0058] refer to Figure 3 By setting the guide column 40, the pulling belt 9 can be turned and guided, so that the end of the pulling belt 9 away from the pressure column 7 can remain horizontal and pull the truncated cone-shaped sealing plug 10.

[0059] Working principle: When the gear oil pump is in use, after the gear oil pump body 1 is powered on and starts working, the oil will enter the gear oil pump body 1 through the liquid inlet pipe 3, and finally be discharged outward from the liquid outlet pipe 2.

[0060] When the oil passes through the liquid inlet pipe 3, the oil can be filtered by the filter screen 4 arranged in the liquid inlet pipe 3. The filter screen 4 is made of stainless steel and is durable. The filter screen 4 is driven by the movable sleeve 1 5 to rotate synchronously in the liquid inlet pipe 3. The power source of the rotation of the movable sleeve 1 5 will be introduced in the following text. The rotation of the movable sleeve 1 5 is supported by the movable sleeve 2 6, and the end of the movable sleeve 2 6 is supported by the pressure column 7 and the sliding rod 8. The end of the sliding rod 8 away from the movable sleeve 2 6 slides up and down on the inner wall of the liquid inlet pipe 3, so that the filter screen 4 can be smoothly lifted and lowered as a whole in the liquid inlet pipe 3. After the gear type oil pump body 1 starts to run, a huge suction force will be generated on the end of the liquid inlet pipe 3 close to the gear type oil pump body 1, so that the round table The truncated cone-shaped sealing plug 10 is sucked and moved toward the gear type oil pump body 1, thereby opening the oil path between the liquid inlet pipe 3 and the gear type oil pump body 1; through the transmission of the pulling belt 9, the pressure column 7, the movable sleeve 2 6, the movable sleeve 1 5 and the filter screen 4 are pulled downward in the liquid inlet pipe 3, so that the filter screen 4 enters the lower space of the liquid inlet pipe 3, so that the filter screen 4 can smoothly filter the oil passing through, and once the gear type oil pump body 1 stops operating, the suction force on the truncated cone-shaped sealing plug 10 in the gear type oil pump body 1 is released, and under the elastic force of the tension spring 1 61, the movable sleeve 2 6 brings the movable sleeve 1 5 and the filter screen 4 to move upward quickly, so that the filter screen 4 is separated from the oil in the liquid inlet pipe 3, so as to prevent the impurities filtered on the filter screen 4 from continuing to contaminate the oil. Through the setting of the clamping sleeve 12, after the filter screen 4 moves down to the lowest point, it can be engaged with the filter screen 4 to avoid gaps at the corners between the filter screen 4 and the inner wall of the liquid inlet pipe 3, so that the liquid flows out without being filtered.

[0061] The coordinated use of the above structures solves the problem that in actual use, the traditional filter screen will be immersed in oil after filtering, which will aggravate the pollution of the oil and bring inconvenience to use.

[0062] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A gear type oil pump, comprising a gear type oil pump body (1), wherein an oil outlet of the gear type oil pump body (1) is fixedly connected to a liquid outlet pipe (2), Features: The oil inlet of the gear-type oil pump body (1) is fixedly connected to a liquid inlet pipe (3); A filter screen (4) for filtering the oil passing through the cavity of the liquid inlet pipe (3) is slidably connected in an upper and lower limit position in the cavity of the liquid inlet pipe (3); a movable sleeve (5) is penetrated at the center of the filter screen (4) and fixedly connected thereto; a movable sleeve (6) is rotatably connected at one end of the movable sleeve (5) close to the gear type oil pump body (1); a tension spring (61) is fixedly connected at the top of the movable sleeve (6); the top of the tension spring (61) is fixedly connected to the top of the inner wall of the liquid inlet pipe (3); a movable sleeve (6) is penetrated at the center of the end of the movable sleeve (6) facing the gear type oil pump body (1) and axially fixedly connected thereto; A pressure column (7) is connected, and one end of the movable sleeve (6) facing the gear-type oil pump body (1) is fixedly connected to two sliding rods (8) that slide up and down the inner wall of the liquid inlet pipe (3). A pulling belt (9) is fixedly connected to the lower surface of the pressure column (7), and a truncated cone-shaped sealing plug (10) that slides horizontally in the cavity of the liquid inlet pipe (3) is fixedly connected to the bottom of the pulling belt (9). A sealing plug block (11) that matches the outer contour of the truncated cone-shaped sealing plug (10) is fixedly connected to the inner wall of the liquid inlet pipe (3), and a clamping sleeve (12) fixed to the inner wall of the liquid inlet pipe (3) is provided directly below the filter screen (4); The filter screen (4) is provided with a blocking device, the blocking device comprising a second ferrule (13) which is limitedly slidably connected to the arc-shaped contour at the top of the filter screen (4), the second ferrule (13) is fixedly connected to a connecting arm located at the top of the movable sleeve (6) on the side facing the gear type oil pump body (1), the top of the second ferrule (13) is fixedly connected to an elastic folding plate (15), the top of the elastic folding plate (15) is fixedly connected to the top of the inner wall of the liquid inlet pipe (3), and the inner wall of the liquid inlet pipe (3) away from the gear type oil pump body (1) is fixedly connected to an inclined block (16) which guides the oil in the liquid inlet pipe (3) downward; A guide column (40) is fixedly connected to the inner wall of the liquid inlet pipe (3), and the outer contour of the guide column (40) is slidably connected to the surface of the pulling belt (9).

2. A gear type oil pump according to claim 1, Features: The filter screen (4) is provided with a driving device for driving the filter screen (4) to rotate relative to the movable sleeve (6); the inner wall of the liquid inlet pipe (3) is fixedly connected with a scraper (17) for scraping and collecting impurities filtered on the surface of the filter screen (4) after the filter screen (4) rotates; and a sealing plug (18) is pierced through and detachably installed on the surface of the liquid inlet pipe (3) facing the scraper (17).

3. A gear type oil pump according to claim 2, Features: The driving device comprises a compression spring (19) which is sleeved on the outer contour of the compression column (7) and is located in the movable sleeve (6); an end of the compression spring (19) which is away from the movable sleeve (6) is movably connected to an end of the movable sleeve (5) which is close to the gear-type oil pump body (1); an end of the compression column (7) which is away from the gear-type oil pump body (1) passes through the movable sleeve (5) and is fixedly connected to a connecting column (20) which is located in the movable sleeve (5); The arc-shaped contour of the connecting column (20) is fixedly connected with a second inclined surface block (21) and a third inclined surface block (22) that cooperate with each other. The inner wall of the movable sleeve (5) is evenly distributed with axially fixed clamping strips (23). The clamping strips (23) on the inner wall of the movable sleeve (5) are respectively matched with the inclined surfaces on the second inclined surface block (21) and the third inclined surface block (22). The inner wall of the liquid inlet pipe (3) is fixedly connected with a protrusion that slidably cooperates with the end of the pressure column (7).

4. A gear type oil pump according to claim 1, Features: The movable sleeve 1 (5) is provided with a pushing device for further centralized processing of impurities scraped from the scraper (17), the pushing device comprising a rotating ring (24) coaxially fixed on the filter screen (4) on the side away from the gear oil pump body (1), the outer contour of the movable sleeve 1 (5) on the end away from the gear oil pump body (1) is rotatably connected to the movable sleeve 3 (25) in an upper limit position, the end of the movable sleeve 3 (25) away from the gear oil pump body (1) is fixedly connected to a connecting frame (26), and the side of the connecting frame (26) away from the gear oil pump body (1) is slidably connected to the inner wall of the liquid inlet pipe (3) in an upper and lower limit position; A T-shaped bracket (27) is radially limitedly slidably connected to a side of the movable sleeve (25) away from the gear oil pump body (1); a movable through groove (28) is provided on the T-shaped bracket (27); a rotating arm (29) is rotatably connected to the inner wall of the movable through groove (28); a transmission column (30) is fixedly connected to a side of the rotating arm (29) away from the rotating ring (24); a triangular block (31) is fixedly connected to one end of the transmission column (30) away from the rotating arm (29); an insertion rod (32) is penetrated through the end of the T-shaped bracket (27) and axially slidably connected; one end of the insertion rod (32) is slidably connected to an inclined surface on the triangular block (31); the other end of the insertion rod (32) is fixedly connected to a connecting plate (33); a tension spring (34) is sleeved on the arc profile of the insertion rod (32); two ends of the tension spring (34) are fixedly connected to the opposite surfaces of the connecting plate (33) and the T-shaped bracket (27).

5. A gear type oil pump according to claim 4, Features: The pushing device also includes two symmetrical guide rods (35) fixedly connected to one side of the rotating arm (29) close to the movable sleeve three (25); two spiral grooves (36) symmetrical to each other are provided on one side of the rotating ring (24) close to the movable sleeve three (25); one end of the two guide rods (35) away from the rotating arm (29) is slidably connected to the inner wall of the corresponding spiral groove (36); a lifting block (37) for guiding the rotating arm (29) to rotate in the movable through groove (28) is fixedly connected to the inner wall of the spiral groove (36) close to the edge of the rotating ring (24); and a pushing frame (38) for further concentrating impurities collected after scraping the upper surface of the scraper (17) is fixedly connected to one end of the rotating arm (29) close to the scraper (17).

6. A gear type oil pump according to claim 5, Features: An elastic slide bar (39) is fixedly connected to a side of the connection plate (33) away from the gear-type oil pump body (1), and an end of the elastic slide bar (39) away from the T-shaped bracket (27) is horizontally limitedly slidably connected to the inner wall of the connection frame (26).

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