Sealing device for forklift internal combustion engine

Abstract

The present invention relates to the technical field of forklift internal combustion engines, and discloses a sealing device for a forklift internal combustion engine, comprising: a fixed flow guide mechanism, wherein a wind pressure cleaning mechanism, a wind pressure dust prevention mechanism and a dust blocking mechanism are respectively fixedly installed inside the fixed flow guide mechanism, wherein the wind pressure dust prevention mechanism is located between the wind pressure cleaning mechanism and the dust blocking mechanism, wherein a pressure storage mechanism is arranged at one end of the fixed flow guide mechanism, wherein a reflux filtering mechanism is arranged inside the pressure storage mechanism, wherein a single-pass air intake mechanism is arranged at one side of the pressure storage mechanism, and an air compression mechanism is arranged at the top of the pressure storage mechanism. The sealing device for the forklift internal combustion engine can actively generate a high-pressure airflow through the air compression mechanism during operation, and continuously blow the gap between the power output shaft of the forklift internal combustion engine and the internal combustion engine casing outward from the wind pressure dust prevention mechanism, thereby avoiding dust from being left attached between the two, reducing the wear caused by dust, and ensuring the sealing effect.

Description

Technical Field

[0001] The invention relates to the technical field of forklift internal combustion engines, in particular to a sealing device for a forklift internal combustion engine. Background Art

[0002] An internal combustion engine is a power machine. It is a thermal engine that burns fuel inside the machine and converts the heat energy it releases directly into power. In a broad sense, internal combustion engines include not only reciprocating piston internal combustion engines, rotary piston engines and free piston engines, but also rotary impeller jet engines. However, the internal combustion engine usually refers to a piston internal combustion engine. Common ones are diesel engines and gasoline engines. It converts internal energy into mechanical energy, and changes internal energy by doing work. An internal combustion forklift refers to a forklift that uses diesel, gasoline or liquefied petroleum gas as fuel and is powered by an engine. It is generally divided into: counterbalanced internal combustion forklifts, container forklifts, and side forklifts.

[0003] In order to provide a rotary sealing effect and prevent dust or water from entering the interior of the internal combustion engine, a rotary seal is installed between the power output shaft of the forklift internal combustion engine and the internal combustion engine casing as an internal and external isolation of the internal combustion engine casing. However, after a long period of use, the exposed part between the power output shaft of the forklift internal combustion engine and the internal combustion engine casing is prone to dust. The dust is stuck between the rotary seal and the power output shaft of the forklift internal combustion engine. As the shaft rotates, it causes greater wear to the rotary seal, affecting the sealing performance. Therefore, a sealing device for the forklift internal combustion engine is needed, so that it can actively create a high-pressure airflow during operation to continuously blow the gap between the power output shaft of the forklift internal combustion engine and the internal combustion engine casing outward, so as to prevent dust from being left and attached between the two, reduce the wear caused by dust, and ensure the sealing effect. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a sealing device for a forklift internal combustion engine, which solves the problems mentioned in the above background.

[0005] The present invention provides the following technical solution: A sealing device for a forklift internal combustion engine, comprising: a fixed flow guide mechanism, wherein a wind pressure cleaning mechanism, a wind pressure dust prevention mechanism and a dust blocking mechanism are respectively fixedly installed inside the fixed flow guide mechanism, the wind pressure dust prevention mechanism is located between the wind pressure cleaning mechanism and the dust blocking mechanism, a pressure storage mechanism is arranged at one end of the fixed flow guide mechanism, a reflux filtering mechanism is arranged inside the pressure storage mechanism, a single-way air intake mechanism is arranged on one side of the pressure storage mechanism, an air compression mechanism is arranged on the top of the pressure storage mechanism, and the single-way air intake mechanism is located between the air compression mechanism and the reflux filtering mechanism.

[0006] Preferably, the fixed air guiding mechanism includes a fixed frame tube, a pipeline external support tube, an air intake hole, an air intake offset hard tube, an air intake hose, a reflux flow hole, a reflux offset hard tube, a reflux hose and a sealing gasket, the number of the pipeline external support tubes is two, and the two pipeline external support tubes are respectively and integrally arranged on both sides of the fixed frame tube, the air intake hole and the reflux flow hole are both penetrated and opened on the inner wall of the fixed frame tube, the air intake offset hard tube is fixedly connected to the inner wall of one end of the air intake hole, the air intake hose is fixedly connected to one end of the air intake offset hard tube, the reflux offset hard tube is fixedly connected to the inner wall of one end of the reflux flow hole, the reflux hose is fixedly connected to one end of the reflux offset hard tube, the sealing gasket is fixedly fitted on one side of the fixed frame tube, and the outer wall of the intake hose and the outer wall of the reflux hose are respectively fixedly connected to the inner walls of the two pipeline external support tubes.

[0007] Preferably, the wind pressure cleaning mechanism comprises a cleaning cylinder, a first inner fixing ring, a first outer fixing ring, an intermediate pressure ring, a first sealing ring and a first eight-shaped sealing ring, the cleaning cylinder is fixedly connected to the inner wall of the fixing frame cylinder, and the surface of the cleaning cylinder is respectively penetrated by a first air inlet hole and a return hole, and the cleaning cylinder is connected with the air inlet through hole through the first air inlet hole, and the cleaning cylinder is connected with the return through hole through the return hole, the number of the first inner fixing ring, the number of the first outer fixing ring, the number of the intermediate pressure ring and the number of the first sealing ring are all two, and the two first inner fixing rings are respectively fixedly connected to the two ends of the cleaning cylinder, and the two first outer fixing rings are respectively fixedly connected to one side of the two first inner fixing rings, and the intermediate pressure ring and the first sealing ring are both fixedly connected between the first inner fixing ring and the first outer fixing ring, and the intermediate pressure ring is located inside the first sealing ring, the number of the first eight-shaped sealing rings is four, and the four first eight-shaped sealing rings are respectively fixedly connected to the two sides of the two intermediate pressure rings.

[0008] Preferably, the wind pressure dust prevention mechanism includes a jet cylinder, a second inner fixing ring, a second outer fixing ring, a second sealing ring and a second figure eight sealing ring, the jet cylinder is fixedly connected to the inner wall of the fixing frame cylinder, and the jet cylinder is fixedly connected to the first outer fixing ring, and a second air inlet hole is opened through the surface of the jet cylinder, and the jet cylinder is connected to the air inlet through-hole through the second air inlet hole, the second inner fixing ring is fixedly connected to one end of the jet cylinder away from the cleaning cylinder, the second outer fixing ring is fixedly connected to one side of the second inner fixing ring, and the second sealing ring and the second figure eight sealing ring are both fixedly connected between the second inner fixing ring and the second outer fixing ring.

[0009] Preferably, the dust blocking mechanism includes a brush cylinder and bristles, the brush cylinder is fixedly connected to the inner wall of the fixed frame cylinder, and the brush cylinder is fixedly connected to the second outer fixed ring, and the bristles are fixedly installed on the inner wall of the brush cylinder.

[0010] Preferably, the pressure storage mechanism includes a lower cylinder end plate, a pressure storage cylinder, an upper cylinder end plate, a pressure storage chamber, an air intake check valve and a pressure gauge, the lower cylinder end plate is fixedly arranged at one end of the air intake hose and the return hose away from the fixed frame cylinder, the pressure storage cylinder is fixedly connected to one side of the lower cylinder end plate, the upper cylinder end plate is fixedly connected to one end of the pressure storage cylinder away from the lower cylinder end plate, the pressure storage chamber is opened inside the pressure storage cylinder, and the pressure storage chamber is connected with the air intake hose, the air intake check valve is fixedly installed at the bottom of the upper cylinder end plate, and the air intake check valve is located inside the pressure storage chamber, and the pressure gauge is fixedly installed on the surface of the pressure storage cylinder, and the input end of the pressure gauge is connected with the pressure storage chamber.

[0011] Preferably, the reflux filter mechanism includes a filter chamber, a mesh plate, a reflux check valve, a filter sponge, a core changing port and a sealing plate, the filter chamber is opened inside the pressure storage cylinder, the number of the mesh plates is two, and the two mesh plates are fixedly connected to the inside of the filter chamber, the reflux check valve is fixedly installed at the bottom of the upper cylinder end plate, and the reflux check valve is located inside the filter chamber, and the reflux check valve is located above the mesh plate, the filter sponge is movably installed between the two mesh plates, the core changing port is penetrated through the inner wall of the filter chamber, and the inner wall of the core changing port is fixedly fitted with a sealing ring, and the sealing plate is fixedly installed on the inner wall of the core changing port.

[0012] Preferably, the single-way air intake mechanism includes a valve seat, a dust cover, a dust filter hole, an inner through hole, a guide frame, an air sealing frame, an air sealing head, a spring and an air inlet, the valve seat is fixedly connected to the inner wall of the pressure storage cylinder, the dust cover is fixedly connected to the outer wall of the pressure storage cylinder, and the dust cover is fixedly connected to the valve seat, the dust filter hole is penetrated and opened on the surface of the dust cover, the inner through hole is penetrated and opened on the surface of the valve seat, the guide frame and the air sealing frame are both fixedly connected to the inner wall of the valve seat, the air sealing head is slidably connected to the inner wall of the guide frame, the spring is movably installed between the air sealing head and the valve seat, the air inlet is penetrated and opened on both sides of the air sealing frame, and the inner wall of the air inlet is movably connected to the surface of the air sealing head, and the surface of the air sealing head is penetrated with a flow hole.

[0013] Preferably, the air compression mechanism includes a lower cylinder seat, a connecting column, an upper cylinder seat and a sealing cover, the lower cylinder seat is fixedly connected to the upper surface of the upper cylinder end plate, the connecting column is fixedly inserted into the top of the lower cylinder seat, the upper cylinder seat is fixedly connected to the top of the connecting column, and the sealing cover is fixedly connected to the upper surface of the upper cylinder seat.

[0014] Preferably, the air compression mechanism also includes a compression motor, an eccentric wheel, an eccentric shaft, a connecting rod, a compression cylinder, a compressed air piston and a piston head. The compression motor is fixedly mounted inside the upper cylinder seat, the eccentric wheel is fixedly mounted on the output end of the compression motor, the eccentric shaft is fixedly inserted in the surface of the eccentric wheel, the connecting rod is rotatably connected to the surface of the eccentric shaft through a bearing, the compression cylinder is fixedly connected between the lower cylinder seat and the upper cylinder seat, the compressed air piston is slidably connected to the inner wall of the compression cylinder, the piston head is fixedly inserted in the inner wall of the compressed air piston, and one end of the piston head is rotatably connected to the connecting rod.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The sealing device of the forklift internal combustion engine can actively generate a high-pressure airflow through the air compression mechanism during operation by means of a fixed flow guiding mechanism, a wind pressure cleaning mechanism, a wind pressure dust prevention mechanism, a dust blocking mechanism, a pressure storage mechanism, a reflux filtering mechanism, a single-pass air intake mechanism and an air compression mechanism, so as to continuously blow outwardly the gap between the power output shaft of the forklift internal combustion engine and the internal combustion engine casing from the wind pressure dust prevention mechanism, thereby avoiding dust from being left and attached between the two, reducing the wear caused by dust and ensuring the sealing effect.

[0017] The sealing device of the forklift internal combustion engine can form a chamber capable of reflux between the power output shaft of the forklift internal combustion engine through the cleaning cylinder, the first inner fixing ring, the first outer fixing ring, the intermediate pressure ring, the first sealing ring and the first eight-shaped sealing ring, so that dust entering the interior through the gap can be taken away by the airflow, thereby preventing dust or moisture from continuing to enter the interior of the internal combustion engine.

[0018] The sealing device of the forklift internal combustion engine can facilitate the external spraying of internal high-speed airflow to spray away dust and form a one-way seal to prevent the outer wall airflow, dust or moisture from entering through the arranged air jet cylinder, the second inner fixed ring, the second outer fixed ring, the second sealing ring and the second eight-shaped sealing ring.

[0019] The sealing device of the forklift internal combustion engine can temporarily store compressed air through the lower cylinder end plate, the pressure storage cylinder, the upper cylinder end plate, the pressure storage chamber, the air intake check valve and the pressure gauge, so as to ensure continuous jetting and avoid jetting interruption.

[0020] The sealing device of the forklift internal combustion engine is provided with a filter chamber, a mesh plate, a reflux check valve, a filter sponge, a core replacement port and a sealing plate, so as to filter the refluxed gas through the filter sponge and conveniently replace the filter sponge through the core replacement port.

[0021] The sealing device of the forklift internal combustion engine can be conducted in a one-way manner through the valve seat, dust cover, dust filter hole, inner through hole, guide frame, air sealing frame, air sealing head, spring and air inlet, so as to draw external air to supplement the air flow after excessive internal gas consumption forms negative pressure.

[0022] The sealing device of the forklift internal combustion engine can utilize the reciprocating motion of the air compression piston to compress air and form an air flow circulation to promote air filtration through the arranged compression motor, eccentric wheel, eccentric shaft, connecting rod, compression cylinder, air compression piston and piston head. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the present invention;

[0024] Figure 2 It is a rear view of the present invention;

[0025] Figure 3 This is a schematic diagram of the structure after the fixed flow guide mechanism of the present invention is installed;

[0026] Figure 4 This is a schematic diagram of the structure of the fixed flow guiding mechanism of the present invention;

[0027] Figure 5 It is a side sectional view of the fixed flow guiding mechanism of the present invention;

[0028] Figure 6 This is a schematic diagram of the internal explosion structure of the fixed flow guide mechanism of the present invention;

[0029] Figure 7 This is a schematic diagram of the internal explosion structure of the wind pressure cleaning mechanism of the present invention;

[0030] Figure 8 This is a schematic diagram of the internal explosion structure of the wind pressure dust prevention mechanism of the present invention;

[0031] Fig. 9 It is a side sectional view of the pressure storage mechanism of the present invention;

[0032] Fig.10 It is a schematic diagram of the internal explosion structure of the pressure storage mechanism of the present invention;

[0033] Fig.11 It is a side sectional view of the single-way air intake mechanism of the present invention.

[0034] In the figure: 101, fixed frame cylinder; 102, pipeline external support cylinder; 103, air intake hole; 104, air intake offset hard pipe; 105, air intake hose; 106, reflux hole; 107, reflux offset hard pipe; 108, reflux hose; 109, sealing pad; 201, cleaning cylinder; 202, first inner fixed ring; 203, first outer fixed ring; 204, intermediate pressure ring; 205, first sealing ring; 206, first eight-shaped sealing ring; 301, jet cylinder; 302, second inner fixed ring; 303, second outer fixed ring; 304, second sealing ring; 305, second eight-shaped sealing ring; 401, brush cylinder; 402, brush hair; 501, lower cylinder end plate; 502, pressure storage cylinder; 503, Upper cylinder end plate; 504, pressure storage chamber; 505, air intake non-return valve; 506, air pressure gauge; 601, filter chamber; 602, mesh plate; 603, return non-return valve; 604, filter sponge; 605, core replacement port; 606, sealing plate; 701, valve seat; 702, dust cover; 703, dust filter hole; 704, inner through hole; 705, guide frame; 706, air sealing frame; 707, air sealing head; 708, spring; 709, air inlet; 801, lower cylinder seat; 802, connecting column; 803, upper cylinder seat; 804, sealing cover; 805, compression motor; 806, eccentric wheel; 807, eccentric shaft; 808, connecting rod; 809, compression cylinder; 810, air compression piston; 811, piston head. DETAILED DESCRIPTION

[0035] 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.

[0036] See also Figure 1-11, a sealing device for a forklift internal combustion engine comprises: a fixed flow guide mechanism, wherein a wind pressure cleaning mechanism, a wind pressure dust prevention mechanism and a dust blocking mechanism are respectively fixedly installed inside the fixed flow guide mechanism, the wind pressure dust prevention mechanism is located between the wind pressure cleaning mechanism and the dust blocking mechanism, a pressure storage mechanism is arranged at one end of the fixed flow guide mechanism, a reflux filtering mechanism is arranged inside the pressure storage mechanism, a single-way air intake mechanism is arranged on one side of the pressure storage mechanism, an air compression mechanism is arranged on the top of the pressure storage mechanism, and the single-way air intake mechanism is located between the air compression mechanism and the reflux filtering mechanism, through the provided fixed flow guide mechanism, the wind pressure cleaning mechanism, the wind pressure dust prevention mechanism, the dust blocking mechanism, the pressure storage mechanism, the reflux filtering mechanism, the single-way air intake mechanism and the air compression mechanism, a high-pressure airflow can be actively generated through the air compression mechanism during operation, and the gap between the power output shaft of the forklift internal combustion engine and the internal combustion engine casing is continuously blown outward from the wind pressure dust prevention mechanism, thereby avoiding dust from being left and attached between the two, reducing the wear caused by dust and ensuring the sealing effect.

[0037] The fixed flow guiding mechanism includes a fixed frame tube 101, a pipe external support tube 102, an air intake hole 103, an air intake offset hard tube 104, an air intake hose 105, a reflux hole 106, a reflux offset hard tube 107, a reflux hose 108 and a sealing pad 109. The number of the pipe external support tube 102 is two, and the two pipe external support tubes 102 are respectively arranged on both sides of the fixed frame tube 101 in an integrated manner. The air intake hole 103 and the reflux hole 106 are both opened through the inner wall of the fixed frame tube 101. The air intake offset hard tube 104 is fixedly connected to the inner wall of one end of the air intake hole 103. The air intake hose 105 is fixedly connected to one end of the air intake offset hard tube 104, the return offset hard tube 107 is fixedly connected to the inner wall of one end of the return flow hole 106, the return hose 108 is fixedly connected to one end of the return offset hard tube 107, the sealing gasket 109 is fixedly fitted on one side of the fixed frame tube 101, and the outer wall of the air intake hose 105 and the outer wall of the return hose 108 are respectively fixedly connected to the inner walls of the two pipe external support tubes 102, so as to provide installation support points for the wind pressure cleaning mechanism, the wind pressure dust prevention mechanism and the dust blocking mechanism, and play a conductive role in the entry and return of airflow.

[0038] Wherein; the wind pressure cleaning mechanism includes a cleaning cylinder 201, a first inner fixing ring 202, a first outer fixing ring 203, an intermediate pressure ring 204, a first sealing ring 205 and a first eight-shaped sealing ring 206, the cleaning cylinder 201 is fixedly connected to the inner wall of the fixing frame cylinder 101, and the surface of the cleaning cylinder 201 is respectively penetrated with a first air inlet hole and a return hole, and the cleaning cylinder 201 is connected to the air inlet through hole 103 through the first air inlet hole, and the cleaning cylinder 201 is connected to the return flow hole 106 through the return hole, the number of the first inner fixing ring 202, the number of the first outer fixing ring 203, the number of the intermediate pressure ring 204 and the number of the first sealing ring 205 are all two, and the two first inner fixing rings 202 are respectively fixedly connected to the two ends of the cleaning cylinder 201, and the two first outer fixing rings 203 are respectively fixedly connected to the two ends of the cleaning cylinder 201, and the two first outer fixing rings 203 are respectively fixedly connected to the two ends of the cleaning cylinder 201. The first outer fixing ring 203 and the first inner fixing ring 204 are fixedly connected to one side of the two first inner fixing rings 202, and the intermediate pressure ring 204 and the first sealing ring 205 are fixedly connected between the first inner fixing ring 202 and the first outer fixing ring 203, and the intermediate pressure ring 204 is located inside the first sealing ring 205. The number of the first eight-shaped sealing rings 206 is four, and the four first eight-shaped sealing rings 206 are fixedly connected to both sides of the two intermediate pressure rings 204, respectively. Through the cleaning cylinder 201, the first inner fixing ring 202, the first outer fixing ring 203, the intermediate pressure ring 204, the first sealing ring 205 and the first eight-shaped sealing ring 206, a chamber capable of reflux can be formed between the power output shaft of the forklift internal combustion engine, and the dust entering the interior through the gap can be taken away by the airflow to prevent dust or moisture from continuing to enter the internal combustion engine.

[0039] Among them; the wind pressure dust prevention mechanism includes a jet cylinder 301, a second inner fixed ring 302, a second outer fixed ring 303, a second sealing ring 304 and a second eight-shaped sealing ring 305, the jet cylinder 301 is fixedly connected to the inner wall of the fixed frame cylinder 101, and the jet cylinder 301 is fixedly connected to the first outer fixed ring 203, and the surface of the jet cylinder 301 is penetrated by a second air inlet hole, and the jet cylinder 301 is connected to the air inlet through hole 103 through the second air inlet hole, and the second inner fixed ring 302 is fixedly connected to the jet cylinder 301 away from the cleaning At one end of the cylinder 201, the second outer fixing ring 303 is fixedly connected to one side of the second inner fixing ring 302, and the second sealing ring 304 and the second figure eight sealing ring 305 are both fixedly connected between the second inner fixing ring 302 and the second outer fixing ring 303. By setting the jet cylinder 301, the second inner fixing ring 302, the second outer fixing ring 303, the second sealing ring 304 and the second figure eight sealing ring 305, the internal high-speed airflow can be conveniently sprayed out to spray away the dust, and a one-way seal can be formed to prevent the outer wall airflow, dust or moisture from entering.

[0040] Among them; the dust blocking mechanism includes a brush cylinder 401 and bristles 402, the brush cylinder 401 is fixedly connected to the inner wall of the fixed frame cylinder 101, and the brush cylinder 401 is fixedly connected to the second outer fixed ring 303, and the bristles 402 are fixedly installed on the inner wall of the brush cylinder 401, so as to initially intercept external dust through the bristles 402.

[0041] The pressure storage mechanism includes a lower cylinder end plate 501, a pressure storage cylinder 502, an upper cylinder end plate 503, a pressure storage chamber 504, an air intake check valve 505 and a pressure gauge 506. The lower cylinder end plate 501 is fixedly arranged at one end of the air intake hose 105 and the return hose 108 away from the fixed frame cylinder 101. The pressure storage cylinder 502 is fixedly connected to one side of the lower cylinder end plate 501. The upper cylinder end plate 503 is fixedly connected to one end of the pressure storage cylinder 502 away from the lower cylinder end plate 501. The pressure storage chamber 504 is opened inside the pressure storage cylinder 502, and the pressure storage chamber 504 is connected to the air intake check valve 505. The hose 105 is connected, the air intake check valve 505 is fixedly installed at the bottom of the upper cylinder end plate 503, and the air intake check valve 505 is located inside the pressure storage chamber 504, the pressure gauge 506 is fixedly installed on the surface of the pressure storage cylinder 502, and the input end of the pressure gauge 506 is connected to the pressure storage chamber 504. Through the lower cylinder end plate 501, the pressure storage cylinder 502, the upper cylinder end plate 503, the pressure storage chamber 504, the air intake check valve 505 and the pressure gauge 506, the compressed air can be temporarily stored to ensure continuous jetting and avoid jetting interruptions.

[0042] Among them, the backflow filter mechanism includes a filter chamber 601, a mesh plate 602, a backflow check valve 603, a filter sponge 604, a core replacement port 605 and a sealing plate 606. The filter chamber 601 is opened inside the pressure storage cylinder 502. There are two mesh plates 602, and the two mesh plates 602 are fixedly connected to the inside of the filter chamber 601. The backflow check valve 603 is fixedly installed at the bottom of the upper cylinder end plate 503, and the backflow check valve 603 is located inside the filter chamber 601, and the backflow check valve 603 is located above the mesh plate 602. The filter sponge 604 is movably installed between the two mesh plates 602, the core changing port 605 passes through the inner wall of the filter cavity 601, and a sealing ring is fixedly attached to the inner wall of the core changing port 605, and the sealing plate 606 is fixedly installed on the inner wall of the core changing port 605. Through the filter cavity 601, mesh plate 602, reflux check valve 603, filter sponge 604, core changing port 605 and sealing plate 606, the reflux gas can be filtered through the filter sponge 604, and the filter sponge 604 can be replaced conveniently through the core changing port 605.

[0043] Among them; the single-way air intake mechanism includes a valve seat 701, a dust cover 702, a dust filter hole 703, an inner through hole 704, a guide frame 705, an air sealing frame 706, an air sealing head 707, a spring 708 and an air inlet 709, the valve seat 701 is fixedly connected to the inner wall of the pressure storage cylinder 502, the dust cover 702 is fixedly connected to the outer wall of the pressure storage cylinder 502, and the dust cover 702 is fixedly connected to the valve seat 701, the dust filter hole 703 penetrates the surface of the dust cover 702, the inner through hole 704 penetrates the surface of the valve seat 701, the guide frame 705 and the air sealing frame 706 are fixedly connected to the inner wall of the valve seat 701, and the air sealing head 707 slides It is movably connected to the inner wall of the guide frame 705, and the spring 708 is movably installed between the sealing head 707 and the valve seat 701. The air inlet 709 is opened on both sides of the air sealing frame 706, and the inner wall of the air inlet 709 is movably connected to the surface of the air sealing head 707, and a flow hole is opened on the surface of the air sealing head 707. Through the valve seat 701, dust cover 702, dust filter hole 703, internal through hole 704, guide frame 705, air sealing frame 706, air sealing head 707, spring 708 and air inlet 709, it can be tested through unidirectional conduction, so as to draw external air to supplement the airflow after excessive internal gas consumption forms a negative pressure.

[0044] Among them; the air compression mechanism includes a lower cylinder seat 801, a connecting column 802, an upper cylinder seat 803 and a sealing cover 804, the lower cylinder seat 801 is fixedly connected to the upper surface of the upper cylinder end plate 503, the connecting column 802 is fixedly plugged into the top of the lower cylinder seat 801, the upper cylinder seat 803 is fixedly connected to the top of the connecting column 802, and the sealing cover 804 is fixedly connected to the upper surface of the upper cylinder seat 803, so as to provide installation, fixation and sealing protection for the compression motor 805 and the compression cylinder 809.

[0045] The air compression mechanism also includes a compression motor 805, an eccentric wheel 806, an eccentric shaft 807, a connecting rod 808, a compression cylinder 809, a compression piston 810 and a piston head 811. The compression motor 805 is fixedly mounted inside the upper cylinder seat 803, the eccentric wheel 806 is fixedly mounted on the output end of the compression motor 805, the eccentric shaft 807 is fixedly plugged into the surface of the eccentric wheel 806, the connecting rod 808 is rotatably connected to the surface of the eccentric shaft 807 through a bearing, and the compression cylinder 809 is fixedly connected to the lower cylinder seat. 801 and the upper cylinder seat 803, the air compressor piston 810 is slidably connected to the inner wall of the compression cylinder 809, the piston head 811 is fixedly inserted into the inner wall of the air compressor piston 810, and one end of the piston head 811 is rotatably connected to the connecting rod 808. Through the set compression motor 805, eccentric wheel 806, eccentric shaft 807, connecting rod 808, compression cylinder 809, air compressor piston 810 and piston head 811, the reciprocating motion of the air compressor piston 810 can be used to compress air and form an air flow circulation to promote air filtration.

[0046] Working principle: when installing, the device is installed on the surface of the power output shaft of the forklift internal combustion engine, so that the surface of the power output shaft of the forklift internal combustion engine is slidably connected with the inner wall of the first eight-shaped sealing ring 206 and the inner wall of the second eight-shaped sealing ring 305. When in use, the compression motor 805 is started, and the compression motor 805 drives the eccentric wheel 806 to rotate. When the eccentric wheel 806 rotates, the connecting rod 808 is driven to reciprocate up and down through the eccentric shaft 807. When the connecting rod 808 reciprocates up and down, the piston head 811 drives the compressed air piston 810 to reciprocate. The reciprocating motion of the compressed air piston 810 is blocked by the intake check valve 505 and the return check valve The guide of 603 continuously sucks in the gas, compresses it and pumps it out. The compressed gas enters the pressure storage chamber 504 from the intake one-way valve 505 for temporary storage. The barometer 506 displays the air pressure. Then the compressed air inside the pressure storage chamber 504 enters the intake hole 103 through the intake hose 105 and the intake offset hard tube 104. Then the gas is diverted. The diverted gas enters the inside of the cleaning cylinder 201 and the inside of the jet cylinder 301 respectively. A high-pressure area is formed inside the jet cylinder 301. The high-pressure gas is discharged from the inside of its gap along the one-way conduction of the second eight-shaped sealing ring 305. The discharged high-speed gas forms a wind pressure, thereby continuously The dust is blown out and a seal is formed to prevent dust from adhering. At the same time, the airflow entering the cleaning cylinder 201 surrounds the surface of the power output shaft of the forklift internal combustion engine and enters the return flow hole 106. At the same time, the airflow takes away the dust passing through the jet cylinder 301, so that the surface of the power output shaft of the forklift internal combustion engine remains clean. The airflow returning to the return flow hole 106 carries dust impurities along the return offset hard pipe 107 and the return hose 108 into the filter chamber 601, and then the airflow is attracted by the negative pressure formed when the air compressor piston 810 contracts. The airflow passes through the filter sponge 604 to filter the dust and hybrids into the compression cylinder 809. Since part of the air The gas is discharged from the jet cylinder 301, so the amount of gas returning to the compression cylinder 809 is less. After the gas flows back to the interior of the compression cylinder 809, there is still negative pressure inside the compression cylinder 809, so that a pressure difference is formed on both sides of the valve seat 701. The external air pressure overcomes the elastic force of the spring 708 to squeeze the air sealing head 707, causing the air sealing head 707 to shrink. The external airflow passes through the air inlet 709 and the internal through hole 704, passes through the air sealing head 707 and enters the filter chamber 601, and then merges with the reflux gas to enter the compression cylinder 809, and then is compressed by the air compression piston 810 and enters the pressure storage chamber 504 again, thereby circulating the above steps to continuously clean the gap.

[0047] 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 sealing device for a forklift internal combustion engine, characterized in that: include: A fixed flow guide mechanism, wherein a wind pressure cleaning mechanism, a wind pressure dust prevention mechanism and a dust blocking mechanism are respectively fixedly installed inside the fixed flow guide mechanism, wherein the wind pressure dust prevention mechanism is located between the wind pressure cleaning mechanism and the dust blocking mechanism, wherein a pressure storage mechanism is arranged at one end of the fixed flow guide mechanism, wherein a reflux filtering mechanism is arranged inside the pressure storage mechanism, wherein a single-pass air intake mechanism is arranged at one side of the pressure storage mechanism, wherein an air compression mechanism is arranged at the top of the pressure storage mechanism, and wherein the single-pass air intake mechanism is located between the air compression mechanism and the reflux filtering mechanism; The fixed flow guiding mechanism comprises a fixed frame tube (101), a pipe external support tube (102), an air intake hole (103), an air intake offset hard tube (104), an air intake hose (105), a reflux hole (106), a reflux offset hard tube (107), a reflux hose (108) and a sealing gasket (109). The number of the pipe external support tubes (102) is two, and the two pipe external support tubes (102) are respectively arranged in an integral manner on both sides of the fixed frame tube (101). The air intake hole (103) and the reflux hole (106) are both opened through the inner wall of the fixed frame tube (101). The air intake offset hard tube (104) is fixedly connected to the inner wall of one end of the air intake through hole (103), the air intake hose (105) is fixedly connected to one end of the air intake offset hard tube (104), the return flow offset hard tube (107) is fixedly connected to the inner wall of one end of the return flow hole (106), the return hose (108) is fixedly connected to one end of the return flow offset hard tube (107), the sealing gasket (109) is fixedly attached to one side of the fixed frame tube (101), and the outer wall of the air intake hose (105) and the outer wall of the return hose (108) are respectively fixedly connected to the inner walls of the two pipeline external support tubes (102); The wind pressure cleaning mechanism comprises a cleaning cylinder (201), a first inner fixing ring (202), a first outer fixing ring (203), an intermediate pressure ring (204), a first sealing ring (205) and a first eight-shaped sealing ring (206); the cleaning cylinder (201) is fixedly connected to the inner wall of the fixing frame cylinder (101); a first air inlet hole and a return hole are respectively formed through the surface of the cleaning cylinder (201); the cleaning cylinder (201) is connected to the air inlet hole (103) through the first air inlet hole; and the cleaning cylinder (201) is connected to the return hole (106) through the return hole; the number of the first inner fixing ring (202), the number of the first outer fixing ring (203), the intermediate pressure ring (204), the first sealing ring (205) and the first eight-shaped sealing ring (206) are 4) and the number of first sealing rings (205) are both two, and the two first inner fixing rings (202) are respectively fixedly connected to the two ends of the cleaning tube (201), and the two first outer fixing rings (203) are respectively fixedly connected to one side of the two first inner fixing rings (202), and the intermediate pressure ring (204) and the first sealing ring (205) are both fixedly connected between the first inner fixing ring (202) and the first outer fixing ring (203), and the intermediate pressure ring (204) is located inside the first sealing ring (205), and the number of the first eight-shaped sealing rings (206) is four, and the four first eight-shaped sealing rings (206) are respectively fixedly connected to the two sides of the two intermediate pressure rings (204); The wind pressure dust prevention mechanism comprises an air jet cylinder (301), a second inner fixing ring (302), a second outer fixing ring (303), a second sealing ring (304) and a second eight-shaped sealing ring (305); the air jet cylinder (301) is fixedly connected to the inner wall of the fixing frame cylinder (101), and the air jet cylinder (301) is fixedly connected to the first outer fixing ring (203); a second air inlet hole is formed through the surface of the air jet cylinder (301), and the air jet cylinder (301) is connected to the air inlet through hole (103) through the second air inlet hole; the second inner fixing ring (302) is fixedly connected to one end of the air jet cylinder (301) away from the cleaning cylinder (201); the second outer fixing ring (303) is fixedly connected to one side of the second inner fixing ring (302); and the second sealing ring (304) and the second eight-shaped sealing ring (305) are both fixedly connected between the second inner fixing ring (302) and the second outer fixing ring (303).

2. A sealing device for a forklift internal combustion engine according to claim 1, characterized in that: The dust blocking mechanism comprises a brush cylinder (401) and bristles (402); the brush cylinder (401) is fixedly connected to the inner wall of the fixed frame cylinder (101); the brush cylinder (401) is fixedly connected to the second outer fixed ring (303); and the bristles (402) are fixedly mounted on the inner wall of the brush cylinder (401).

3. The sealing device for a forklift internal combustion engine according to claim 1, characterized in that: The pressure storage mechanism comprises a lower cylinder end plate (501), a pressure storage cylinder (502), an upper cylinder end plate (503), a pressure storage chamber (504), an air intake check valve (505) and a pressure gauge (506); the lower cylinder end plate (501) is fixedly arranged at one end of the air intake hose (105) and the return hose (108) away from the fixed frame cylinder (101); the pressure storage cylinder (502) is fixedly connected to one side of the lower cylinder end plate (501); and the upper cylinder end plate (503) is fixedly connected to the end of the pressure storage cylinder (502) away from the fixed frame cylinder (101). The pressure storage chamber (504) is opened inside the pressure storage cylinder (502) at one end away from the lower cylinder end plate (501), and the pressure storage chamber (504) is communicated with the air intake hose (105). The air intake check valve (505) is fixedly installed on the bottom of the upper cylinder end plate (503), and the air intake check valve (505) is located inside the pressure storage chamber (504). The air pressure gauge (506) is fixedly installed on the surface of the pressure storage cylinder (502), and the input end of the air pressure gauge (506) is communicated with the pressure storage chamber (504).

4. A sealing device for a forklift internal combustion engine according to claim 3, characterized in that: The backflow filtering mechanism comprises a filtering chamber (601), a mesh plate (602), a backflow check valve (603), a filtering sponge (604), a core replacement port (605) and a sealing plate (606); the filtering chamber (601) is opened inside the pressure storage cylinder (502); there are two mesh plates (602), and both mesh plates (602) are fixedly connected to the inside of the filtering chamber (601); the backflow check valve (603) is fixedly mounted on the upper cylinder end plate (502); 03), and the reflux check valve (603) is located inside the filter chamber (601), and the reflux check valve (603) is located above the mesh plate (602), the filter sponge (604) is movably installed between the two mesh plates (602), the core replacement port (605) is opened through the inner wall of the filter chamber (601), and the inner wall of the core replacement port (605) is fixedly fitted with a sealing ring, and the sealing plate (606) is fixedly installed on the inner wall of the core replacement port (605).

5. The sealing device for a forklift internal combustion engine according to claim 3, characterized in that: The single-pass air intake mechanism comprises a valve seat (701), a dust cover (702), a dust filter hole (703), an inner through hole (704), a guide frame (705), an air sealing frame (706), an air sealing head (707), a spring (708) and an air inlet (709); the valve seat (701) is fixedly connected to the inner wall of the pressure storage cylinder (502); the dust cover (702) is fixedly connected to the outer wall of the pressure storage cylinder (502); the dust cover (702) is fixedly connected to the valve seat (701); the dust filter hole (703) is opened through the surface of the dust cover (702); the inner through hole (704) is penetrated and opened on the surface of the valve seat (701), the guide frame (705) and the air sealing frame (706) are fixedly connected to the inner wall of the valve seat (701), the air sealing head (707) is slidably connected to the inner wall of the guide frame (705), the spring (708) is movably installed between the air sealing head (707) and the valve seat (701), the air inlet (709) is penetrated and opened on both sides of the air sealing frame (706), and the inner wall of the air inlet (709) is movably connected to the surface of the air sealing head (707), and a flow hole is penetrated and opened on the surface of the air sealing head (707).

6. The sealing device for a forklift internal combustion engine according to claim 3, characterized in that: The air compression mechanism comprises a lower cylinder seat (801), a connecting column (802), an upper cylinder seat (803) and a sealing cover (804); the lower cylinder seat (801) is fixedly connected to the upper surface of the upper cylinder end plate (503); the connecting column (802) is fixedly plugged into the top of the lower cylinder seat (801); the upper cylinder seat (803) is fixedly connected to the top of the connecting column (802); and the sealing cover (804) is fixedly connected to the upper surface of the upper cylinder seat (803).

7. The sealing device for a forklift internal combustion engine according to claim 6, characterized in that: The air compression mechanism further comprises a compression motor (805), an eccentric wheel (806), an eccentric shaft (807), a connecting rod (808), a compression cylinder (809), a gas compression piston (810) and a piston head (811); the compression motor (805) is fixedly mounted inside the upper cylinder seat (803); the eccentric wheel (806) is fixedly mounted at the output end of the compression motor (805); the eccentric shaft (807) is fixedly plugged into the surface of the eccentric wheel (806); the connecting rod (808) is rotatably connected to the surface of the eccentric shaft (807) via a bearing; the compression cylinder (809) is fixedly connected between the lower cylinder seat (801) and the upper cylinder seat (803); the gas compression piston (810) is slidably connected to the inner wall of the compression cylinder (809); the piston head (811) is fixedly plugged into the inner wall of the gas compression piston (810); and one end of the piston head (811) is rotatably connected to the connecting rod (808).

Images