Explosion-proof motor

Abstract

The explosion-proof motor comprises a motor main body, the motor main body is provided with an output shaft, an end cover, an end cover and a junction box, the end cover is provided with a plurality of groups of power assemblies, the power assemblies are provided with cooling and deashing assemblies, the end parts of the cooling and deashing assemblies are provided with pull-back assemblies, and the end cover is internally provided with a sealing assembly. Through the arrangement of the sealing assembly, when the pressure in the expansion cavity is sufficient, gas extrudes the adjusting block through the communicating opening, so that the exhaust channel communicates with the throttling channel, the gas is discharged out of the sealing ring, dust and impurities can be blocked, and the service life of a sealing piece is prolonged; when the sealing lip is worn, gas pushes the adjusting block to move, the gas transmission hole is communicated with the exhaust hole, the gas enters the expansion cavity, the elastic hoop is pushed to move, the sealing lip is further extruded and sealed, the sealing performance is prevented from being reduced, oil leakage and explosive gas or dust are prevented from entering, and therefore the safety of the motor is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of explosion-proof motors, and particularly to an explosion-proof motor. Background Art

[0002] An explosion-proof motor is a motor specifically designed to operate in flammable and explosive environments. These motors do not generate electric sparks during operation to avoid causing fires or explosions in flammable and explosive environments. The main application fields of explosion-proof motors for automobiles include coal mines, oil and natural gas, petrochemicals, and the chemical industry. The main function of explosion-proof motors is to prevent external explosive gas mixtures from entering the interior of the motor through their special structures and material selections. These motors usually adopt explosion-proof enclosures. When these gases come into contact with the sparks, electric arcs, or dangerous high temperatures inside the motor, the explosion-proof enclosures of the motor can prevent explosions and ensure that the surrounding explosive gas mixtures will not be ignited. Generally, they are used in vehicles transporting liquefied natural gas (LNG) or chemicals, and it is necessary to prevent the circuit system from becoming an ignition source.

[0003] The rotation of the output shaft of an explosion-proof motor for automobiles usually wears the seals. Since the seals seal the motor under the elastic force of the elastic hoop, but the elastic force of the elastic hoop is fixed and cannot be adjusted adaptively. On the one hand, it will cause the contact force between the seal and the output shaft to be too large, accelerating the wear of the seal and requiring frequent replacement, which affects the working efficiency of the motor. On the other hand, it will cause the contact degree between the seal and the output shaft to decrease, resulting in a decline in sealing performance. Prolonged use will cause oil leakage and allow explosive gases or dust to enter, thus triggering an explosion hazard of the explosion-proof motor. At the same time, during the operation of the motor, the outer wall of the motor is covered by dust or dirt for a long time, resulting in poor heat dissipation of the motor outer wall, increasing the motor temperature, affecting the operation efficiency of the motor, and the body also needs to be cleaned and maintained regularly, which is time-consuming and troublesome.

[0004] Therefore, the present invention proposes an explosion-proof motor to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide an explosion-proof motor, which can avoid frequent replacement of seals and affect the working efficiency of the motor. At the same time, during the operation of the motor, the outer wall of the motor is covered by dust or dirt for a long time, resulting in poor heat dissipation of the motor outer wall, increasing the motor temperature, affecting the operation efficiency of the motor, and the body also needs to be cleaned and maintained regularly, which is time-consuming and troublesome, so as to solve the technical problems raised in the above background art.

[0006] To achieve the above object, the present invention provides the following technical solution: An explosion-proof motor, including a motor main body, the motor main body is provided with an output shaft, end covers, end shields and a junction box, multiple power components are arranged on the end shield, a cooling and dust cleaning component is arranged on the power component, a pulling-back component is arranged at the end of the cooling and dust cleaning component, and a sealing component is arranged inside the end cover;

[0007] The sealing component includes a sealing block arranged inside the end cover, a sealing ring is sleeved between the sealing block and the output shaft, the contact point between the sealing ring and the output shaft is set as a sealing lip, an adjustment groove is opened inside the sealing ring, an elastic hoop is sleeved inside the adjustment groove, and an expansion chamber is opened inside the sealing ring.

[0008] Preferably, an adjustment cavity is opened inside the sealing ring, an adjustment block is slidably connected inside the adjustment cavity, a second elastic member is connected between one end of the adjustment block and the adjustment cavity, a communication port is opened between the adjustment cavity and the expansion chamber, an air storage tank is opened inside the adjustment block, an air injection hole communicating the adjustment cavity and the expansion chamber is opened inside the sealing ring, an exhaust hole and an exhaust passage communicating with the air storage tank are opened on the outer peripheral side of the adjustment block, and a throttling passage is opened on one side of the adjustment cavity away from the motor main body.

[0009] Preferably, the adjustment groove is of an inclined structure. When the expansion chamber expands, it can squeeze the adjustment groove to change the angle of the adjustment groove, push the elastic hoop to move inside the adjustment groove, and further squeeze the sealing lip;

[0010] When the gas in the expansion chamber is saturated, the gas will enter the adjustment cavity through the communication port to cooperate with the second elastic member to squeeze the adjustment block, so that the exhaust passage and the throttling passage are communicated to discharge the excess gas. When the air pressure in the expansion chamber decreases, the gas in the air storage tank will squeeze the second elastic member to move through the adjustment block, so that the air injection hole and the exhaust hole are communicated, and the gas enters the expansion chamber.

[0011] Preferably, the cooling and dust cleaning component includes a support cylinder arranged on the outer peripheral side of the motor main body, an air blowing port is opened on one side of the support cylinder close to the motor main body, and the outer side of one end of the support cylinder away from the power component is fixedly connected to the motor main body through a fixing rod.

[0012] Preferably, an air collecting chamber is formed at one end of the support cylinder away from the power assembly. The air collecting chamber is arranged eccentrically. A rotating block is rotatably connected inside the air collecting chamber. The rotating block is eccentrically arranged with respect to the air collecting chamber. A plurality of first sliding grooves are formed in the rotating block at circumferentially equidistant intervals. A sliding blade is slidably connected in each first sliding groove. An air inlet communicating with the inside of the air collecting chamber is formed in the outer wall of one end of the support cylinder. An air outlet is formed in the fixed rod. A gas supply channel is formed between the air outlet and the adjustment chamber.

[0013] Preferably, the power assembly includes a sprocket housing fixedly connected to the end cover. A rotating rod is rotatably connected to the center inside the sprocket housing. One end of the rotating rod close to the end cover is fixedly connected to one end of the output shaft. A toothless sprocket is fixedly connected to the outer wall of the rotating rod. A plurality of driven rotating rods are rotatably connected inside the sprocket housing. A double-row sprocket is fixedly connected to the outer wall of each driven rotating rod. The double-row sprocket meshes with the toothless sprocket.

[0014] Preferably, a plurality of connecting covers arranged at circumferentially equidistant intervals are fixedly connected to the outside of the sprocket housing. One end of each connecting cover away from the sprocket housing is fixedly connected to the support cylinder in each group of cooling and dust cleaning assemblies. A linkage rod is rotatably connected inside each connecting cover. A first sprocket and a second sprocket are fixedly connected to the outer wall of each linkage rod. The first sprocket is connected to the double-row sprocket by a chain.

[0015] Preferably, a plurality of partition plates are arranged inside the support cylinder. The inside of the support cylinder is divided into a plurality of installation chambers by the plurality of partition plates. A rotating rod is rotatably connected inside the support cylinder. A rotating fan fixedly connected to the rotating rod is rotatably connected in each installation chamber of the support cylinder. One end of the rotating rod located inside the air collecting chamber is fixedly connected to the rotating block. A third sprocket is fixedly connected to one end of the rotating rod close to the power assembly. The third sprocket is meshed and connected with the corresponding second sprocket.

[0016] Preferably, the pulling-back assembly includes a support rod fixedly connected to one end of the support cylinder away from the power assembly. The other end of the support rod is fixedly connected to the end cover. A winding wheel fixedly connected to the rotating rod is rotatably connected inside the support rod.

[0017] Preferably, a second sliding groove is formed inside the support rod. A baffle is slidably connected in the second sliding groove. A first elastic member is arranged inside the second sliding groove. One end of the first elastic member is connected to the second sliding groove. The other end of the first elastic member is connected to the side of the baffle away from the end cover. A pulling rope is arranged between the winding wheel and the baffle.

[0018] The beneficial effects of the present invention are:

[0019] 1. Through the settings of the power component, cooling and dust cleaning component, and pulling-back component, after the main motor body is started, the output shaft drives the toothless sprocket to rotate. When the toothless sprocket meshes with one of the double-row sprockets, the third sprocket is driven to rotate through the first sprocket and the second sprocket, and at the same time, the rotating fan is driven to rotate together, so that the rotating fan cools the main motor body and blows dust for cleaning. When the rotating rod rotates, it drives the winding wheel to rotate together, so that the winding wheel winds the pulling rope. When the pulling rope is wound, it pulls the baffle to move and squeezes the first elastic member to store energy; when the toothless sprocket is separated from the double-row sprocket, the rotating rod loses traction. At this time, the first elastic member that stores energy is released, so that the rotating rod drives the rotating fan to rotate in the reverse direction, repeatedly cooling and blowing dust for the main motor body, thereby avoiding the problem that the motor is covered by dust or dirt, resulting in poor heat dissipation of the outer wall of the motor and an increase in the motor temperature, improving the operating efficiency and service life of the motor, being able to improve the electric energy conversion efficiency of the vehicle, reduce energy consumption, avoid the temperature protection of the electronic control system triggered by the over-high temperature of the vehicle motor, prevent the electronic control system from forcibly restricting power output or directly shutting down, and improving the safety performance of the vehicle;

[0020] 2. Through the setting of the sealing component, when the rotating rod drives the rotating block to rotate synchronously, air enters the air collection chamber from the air inlet, passes through the air supply channel and enters the air storage tank in the regulating block. When the pressure in the expansion chamber is sufficient and the sealing lip is not worn, the gas in the expansion chamber will squeeze the regulating block, making the regulating block unable to move. At this time, the exhaust channel is communicated with the throttling channel, and the air in the air storage tank is discharged from the sealing ring. The discharged gas can block dust and impurities through the gap between the end cover and the output shaft, thereby being able to extend the service life of the motor; when the sealing lip is worn and the air pressure in the expansion chamber decreases, the injection pressure in the air storage tank will push the regulating block to move, making the air injection hole communicate with the exhaust hole, so that the gas in the air storage tank enters the expansion chamber, causing the expansion chamber to expand and squeeze the elastic hoop to move, further applying pressure to the sealing lip for sealing, preventing the sealing performance from decreasing, avoiding combustibles from entering the interior of the motor, preventing the motor explosion from affecting the safety performance of the vehicle, and thus improving the safety of the vehicle and the vehicle users. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 is a schematic diagram of the overall structure of the present invention from another perspective;

[0023] Figure 3 is a schematic diagram of the structure of the power component and the cooling and dust cleaning component of the present invention;

[0024] Figure 4 is a schematic diagram of the internal sectional structure of the power component of the present invention;

[0025] Figure 5 Explosion structure schematic diagram of the cooling and dust cleaning component of the present invention;

[0026] Figure 6 Explosion structure schematic diagram of the pulling-back component of the present invention;

[0027] Figure 7 Cross-sectional structure schematic diagram of the air collection chamber of the present invention;

[0028] Figure 8 Cross-sectional structure schematic diagram of the end cover of the present invention;

[0029] Figure 9 Structure schematic diagram of the sealing ring of the present invention;

[0030] Figure 10 Cross-sectional structure schematic diagram of the sealing ring of the present invention;

[0031] Figure 11 For the present invention Figure 10 Enlarged structure schematic diagram of part A in

[0032] Reference numerals are: 1, motor main body; 12, output shaft; 13, end cover; 14, end shield; 15, junction box; 2, power component; 21, sprocket housing; 22, rotating rod; 23, toothless sprocket; 24, driven rotating rod; 25, double-row sprocket; 26, connecting cover; 27, linkage rod; 28, first sprocket; 29, second sprocket; 3, cooling and dust cleaning component; 31, support cylinder; 32, fixed rod; 33, partition; 34, rotating rod; 35, rotating fan; 36, third sprocket; 4, pulling-back component; 41, support rod; 42, winding wheel; 43, second sliding groove; 44, baffle; 45, first elastic member; 46, pulling rope; 5, sealing component; 51, sealing block; 52, sealing ring; 53, sealing lip; 54, adjusting groove; 55, elastic hoop; 56, expansion chamber; 57, adjusting chamber; 58, adjusting block; 59, second elastic member; 510, communication port; 511, air storage tank; 512, air delivery hole; 513, exhaust hole; 514, exhaust passage; 515, throttling passage; 516, air collection chamber; 517, rotating block; 518, first sliding groove; 519, sliding blade; 520, air inlet; 521, air outlet; 522, air supply passage. Detailed implementation manners

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments; based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present invention.

[0034] Embodiment 1

[0035] During the operation of the automotive motor, for a long time, the outside of the automotive motor will be covered by dust or dirt, resulting in poor heat dissipation of the outer wall of the automotive motor, increasing the motor temperature, affecting the operating efficiency of the automotive motor, and the body also needs to be cleaned and maintained regularly, which is time-consuming and troublesome.

[0036] As Figures 1 to 11 shown, the present invention proposes an explosion-proof motor, including a motor main body 1, the motor main body 1 is provided with an output shaft 12, an end cover 13, an end shield 14 and a junction box 15, multiple groups of power components 2 are arranged on the end shield 14, a cooling and dust-removing component 3 is arranged on the power components 2, a pulling-back component 4 is arranged at the end of the cooling and dust-removing component 3, the pulling-back component 4 is elastically arranged, and a sealing component 5 is arranged in the end cover 13.

[0037] As Figures 1 to 5 shown, the power component 2 includes a sprocket housing 21 fixedly connected to the end shield 14, a rotating rod 22 is rotatably connected to the center of the sprocket housing 21, one end of the rotating rod 22 close to the end cover 13 is fixedly connected to one end of the output shaft 12, an incomplete sprocket 23 is fixedly connected to the outer wall of the rotating rod 22, multiple driven rotating rods 24 are rotatably connected in the sprocket housing 21, a double-row sprocket 25 is fixedly connected to the outer wall of each driven rotating rod 24, the double-row sprocket 25 is engaged with the incomplete sprocket 23, multiple connecting covers 26 arranged at equal circumferential intervals are fixedly connected to the outside of the sprocket housing 21, one end of each connecting cover 26 away from the sprocket housing 21 is respectively fixedly connected to a support cylinder 31 in each group of cooling and dust-removing components 3, a linkage rod 27 is rotatably connected in each connecting cover 26, a first sprocket 28 and a second sprocket 29 are fixedly connected to the outer wall of each linkage rod 27, and the first sprocket 28 is connected to the double-row sprocket 25 through a chain.

[0038] As Figures 3 to 5 shown, the cooling and dust-removing component 3 includes a support cylinder 31 arranged on the outer peripheral side of the motor main body 1, an air blowing port is opened on one side of the support cylinder 31 close to the motor main body 1, the outer side of one end of the support cylinder 31 away from the power component 2 is fixedly connected to the motor main body 1 through a fixing rod 32, multiple partition plates 33 are arranged in the support cylinder 31, the interior of the support cylinder 31 is divided into multiple installation chambers by the multiple partition plates 33, a rotating rod 34 is rotatably connected in the support cylinder 31, a rotating fan 35 fixedly connected to the rotating rod 34 is rotatably connected in each installation chamber of the support cylinder 31, a third sprocket 36 is fixedly connected to one end of the rotating rod 34 close to the power component 2, and the third sprocket 36 is meshed and connected with the corresponding second sprocket 29.

[0039] As Figures 3 to 6As shown in the figure, the retraction assembly 4 includes a support rod 41 fixedly connected to one end of the support cylinder 31 away from the power assembly 2. The other end of the support rod 41 is fixedly connected to the end cover 13. A winding wheel 42 fixedly connected to the rotating rod 34 is rotatably connected inside the support rod 41. A second sliding groove 43 is formed inside the support rod 41. A baffle 44 is slidably connected inside the second sliding groove 43. A first elastic member 45 is arranged inside the second sliding groove 43. One end of the first elastic member 45 is connected to the second sliding groove 43, and the other end of the first elastic member 45 is connected to the side of the baffle 44 away from the end cover 13. A pull rope 46 is arranged between the winding wheel 42 and the baffle 44.

[0040] During actual use, after the motor main body 1 is started, the output shaft 12 will drive the sprocket with missing teeth 23 on the rotating rod 22 to rotate. When the sprocket with missing teeth 23 meshes with one of the double-row sprockets 25, it will drive the first sprocket 28 and the second sprocket 29 to rotate through the chain, and drive the third sprocket 36 to rotate through the second sprocket 29. At the same time, the third sprocket 36 will drive the rotating fan 35 on the rotating rod 34 to rotate together, so that the rotation of the rotating fan 35 can cool the motor main body 1 by blowing air and clean the dust. When the rotating rod 34 rotates, it will drive the winding wheel 42 to rotate together, so that the winding wheel 42 winds the pull rope 46. When the pull rope 46 is wound, it will pull the baffle 44 to move and compress the first elastic member 45 to store energy;

[0041] When the sprocket with missing teeth 23 separates from one of the double-row sprockets 25, the corresponding rotating rod 34 will lose traction. At this time, the stored first elastic member 45 is released, so that the baffle 44 returns to its previous position, pulling the rotating rod 34 to drive the rotating fan 35 to rotate in the reverse direction, and repeatedly cooling the motor main body 1 and cleaning the dust.

[0042] In summary, through the settings of the power component 2, the cooling and dust cleaning component 3, and the pulling-back component 4, after the motor main body 1 is started, the output shaft 12 will drive the toothless sprocket 23 to rotate. When the toothless sprocket 23 meshes with one of the double-row sprockets 25, it drives the third sprocket 36 to rotate through the first sprocket 28 and the second sprocket 29, and at the same time drives the rotating fan 35 to rotate together, so that the rotating fan 35 cools the motor main body 1 and blows dust for cleaning. When the rotating rod 34 rotates, it will drive the winding wheel 42 to rotate together, so that the winding wheel 42 winds the pulling rope 46. When the pulling rope 46 is wound, it will pull the baffle 44 to move and compress the first elastic member 45 to store energy; when the toothless sprocket 23 is separated from the double-row sprocket 25, the rotating rod 34 will lose traction, and at this time, the stored first elastic member 45 is released, so that the rotating rod 34 drives the rotating fan 35 to rotate in the reverse direction, repeatedly cooling the motor main body 1 and blowing dust for cleaning, thereby avoiding the problem that the motor is covered by dust or dirt, resulting in poor heat dissipation of the motor outer wall and an increase in the motor temperature, improving the operating efficiency and service life of the motor, improving the electric energy conversion efficiency of the vehicle, reducing energy consumption, avoiding the temperature protection of the electric control system triggered by the overheating of the vehicle motor, preventing the electric control system from forcibly restricting power output or directly shutting down, and improving the safety performance of the vehicle.

[0043] Embodiment 2

[0044] The rotation of the output shaft of the explosion-proof motor usually wears the seal. Since the seal seals the motor under the elastic force of the elastic hoop, but the elastic force of the elastic hoop is fixed and cannot be adjusted adaptively. On the one hand, it will cause the contact force between the seal and the output shaft to be too large, accelerating the wear of the seal and requiring frequent replacement, affecting the working efficiency of the vehicle motor. On the other hand, it will cause the contact degree between the seal and the output shaft to decrease, resulting in a decrease in sealing performance. Prolonged use will cause oil leakage and allow explosive gases or dust to enter, thus triggering the explosion risk of the explosion-proof motor. Therefore, this embodiment improves the device described in the above embodiment.

[0045] Such as Figures 7 to 11As shown in the figure, the sealing assembly 5 includes a sealing block 51 disposed within the end cap 13. A sealing ring 52 is sleeved between the sealing block 51 and the output shaft 12. The contact point between the sealing ring 52 and the output shaft 12 is set as a sealing lip 53. An adjustment groove 54 is formed inside the sealing ring 52. An elastic hoop 55 is sleeved within the adjustment groove 54. An expansion chamber 56 is formed inside the sealing ring 52. An adjustment chamber 57 is formed inside the sealing ring 52. An adjustment block 58 is slidably connected within the adjustment chamber 57. One end of the adjustment block 58 is connected to the adjustment chamber 57 by a second elastic member 59. A communication port 510 is formed between the adjustment chamber 57 and the expansion chamber 56. An air storage groove 511 is formed within the adjustment block 58. An air intake hole 512 communicating the adjustment chamber 57 with the expansion chamber 56 is formed inside the sealing ring 52. An exhaust hole 513 and an exhaust passage 514 communicating with the air storage groove 511 are formed on the outer peripheral side of the adjustment block 58. A throttle passage 515 is formed on the side of the adjustment chamber 57 away from the motor body 1.

[0046] As Figure 10 shown in the figure, the adjustment groove 54 is of an inclined structure. When the expansion chamber 56 expands, it can squeeze the adjustment groove 54, causing the angle of the adjustment groove 54 to change, and pushing the elastic hoop 55 to move within the adjustment groove 54 to further squeeze the sealing lip 53.

[0047] As Figures 7 to 11 shown in the figure, when the gas in the expansion chamber 56 is saturated, the gas will enter the adjustment chamber 57 through the communication port 510 to cooperate with the second elastic member 59 to squeeze the adjustment block 58, causing the exhaust passage 514 to communicate with the throttle passage 515 to discharge the excess gas. When the air pressure in the expansion chamber 56 decreases, the gas in the air storage groove 511 will squeeze the second elastic member 59 to move through the adjustment block 58, causing the air intake hole 512 to communicate with the exhaust hole 513, and the gas to enter the expansion chamber 56.

[0048] As Figures 5 to 8 shown in the figure, a gas collection chamber 516 is formed at one end of the support cylinder 31 away from the power assembly 2. The gas collection chamber 516 is arranged off-axis. A rotating block 517 is rotatably connected inside the gas collection chamber 516. The rotating block 517 is eccentrically arranged with respect to the gas collection chamber 516. One end of the rotating rod 34 located inside the gas collection chamber 516 is fixedly connected to the rotating block 517. A plurality of first sliding grooves 518 evenly distributed in a circular pattern are formed inside the rotating block 517. A sliding blade 519 is slidably connected within each first sliding groove 518. An air inlet 520 communicating with the inside of the gas collection chamber 516 is formed on the outer wall of one end of the support cylinder 31. An air outlet 521 is formed inside the fixed rod 32. A gas supply passage 522 is formed between the air outlet 521 and the adjustment chamber 57. There is sealed compressed gas between the first sliding groove 518 and the sliding blade 519. When the rotating block 517 rotates, the sliding blade 519 will expand and compress the sealed compressed gas according to the inner wall of the gas collection chamber 516. The specific working principle can refer to a vane pump and will not be elaborated here.

[0049] During actual use, when the output shaft 12 drives the rotating rod 34 and the rotating fan 35 to cool and remove dust from the outer wall of the motor main body 1 through the power assembly 2, the rotating rod 34 will drive the rotating block 517 to rotate synchronously. Air will enter the air collecting chamber 516 from the air inlet 520. After the rotation of the sliding blade 519, the air will enter the air supply channel 522 from the air outlet 521 and enter the air storage tank 511 in the adjusting block 58 through the air supply channel 522. When the pressure in the expansion chamber 56 is sufficient, that is, when the sealing lip 53 of the sealing ring 52 is not worn, the gas in the expansion chamber 56 will enter the adjusting chamber 57 through the communication port 510 and cooperate with the second elastic member 59 to squeeze the adjusting block 58, so that the adjusting block 58 cannot compress the second elastic member 59 to move. At this time, the exhaust channel 514 is communicated with the throttling channel 515, and the adjusting block 58 will block the air injection hole 512. The air in the air storage tank 511 will be discharged from the sealing ring 52 through the exhaust channel 514 and the throttling channel 515. The discharged gas will be discharged through the gap between the end cover 13 and the output shaft 12, and the dust and impurities can be blocked by the discharged gas, thereby extending the service life of the motor.

[0050] It should be noted that when the elastic hoop 55 has too much elastic force, resulting in too much contact force between the sealing lip 53 and the output shaft 12, the elastic hoop 55 will slide in the inclined adjusting groove 54, reducing the force exerted by the elastic hoop 55 on the sealing lip 53, preventing the contact force between the sealing lip 53 and the output shaft 12 from being too large and avoiding excessive wear.

[0051] When the sealing lip 53 is worn and the elastic force of the elastic hoop 55 cannot make the sealing lip 53 contact the output shaft 12 for sealing, refer to Figure 10 , the force exerted by the elastic hoop 55 on the adjusting groove 54 will decrease, and the expansion chamber 56 can expand further. At this time, the air pressure in the expansion chamber 56 decreases. After the pressure in the expansion chamber 56 decreases, it cannot cooperate with the second elastic member 59 to continue to support the adjusting block 58. At this time, the gas injection pressure in the air storage tank 511 will push the adjusting block 58 to squeeze the second elastic member 59 to move, so that the air injection hole 512 is communicated with the exhaust hole 513, and the throttling channel 515 is blocked by the adjusting block 58. The gas in the air storage tank 511 will enter the expansion chamber 56 through the exhaust hole 513 and the air injection hole 512, causing the expansion chamber 56 to expand and squeeze the adjusting groove 54, changing the angle of the adjusting groove 54 and pushing the elastic hoop 55 to move, further applying pressure to the sealing lip 53 so that the sealing lip 53 contacts the output shaft 12 for sealing, thereby enabling the contact force between the sealing ring 52 and the output shaft 12 to be adaptively adjusted in the state where the elastic force of the elastic hoop 55 is fixed.

[0052] It should be noted that when the elastic force of the elastic hoop 55 can squeeze the sealing lip 53 inside the adjustment groove 54 to contact the output shaft 12 to achieve sealing, the gas in the expansion chamber 56 cannot further squeeze the adjustment groove 54 to deform. At this time, the pressure in the expansion chamber 56 gradually increases, and the gas in the expansion chamber 56 will enter the adjustment chamber 57 through the communication port 510 and cooperate with the second elastic member 59 to push the adjustment block 58 back to the initial position, so that the exhaust passage 514 is communicated with the throttle passage 515, and the adjustment block 58 re-blocks the air injection hole 512. In this way, when the sealing lip 53 is worn, the angle of the adjustment groove 54 can be changed by the expansion of the expansion chamber 56, and the elastic hoop 55 is pushed to move to adaptively compensate for the wear of the sealing lip 53, prevent the sealing performance from decreasing, avoid oil leakage and the entry of explosive gases or dust, prevent the motor explosion from affecting the safety performance of the vehicle, and thus improve the safety of the vehicle and the vehicle users.

[0053] In summary, through the setting of the sealing assembly 5, when the rotating rod 34 drives the rotating block 517 to rotate synchronously, air enters the air collection chamber 516 from the air inlet 520, passes through the air supply passage 522 and enters the air storage tank 511 in the adjustment block 58. When the pressure in the expansion chamber 56 is sufficient and the sealing lip 53 is not worn, the gas in the expansion chamber 56 will squeeze the adjustment block 58, making the adjustment block 58 unable to move. At this time, the exhaust passage 514 is communicated with the throttle passage 515, and the air in the air storage tank 511 is discharged from the sealing ring 52. The discharged gas can block dust and impurities through the gap between the end cover 13 and the output shaft 12, thereby extending the service life of the motor; when the sealing lip 53 is worn and the air pressure in the expansion chamber 56 decreases, the gas injection pressure in the air storage tank 511 will push the adjustment block 58 to move, so that the air injection hole 512 is communicated with the exhaust hole 513, and the gas in the air storage tank 511 enters the expansion chamber 56, causing the expansion chamber 56 to expand and squeeze the elastic hoop 55 to move, further applying pressure to the sealing lip 53 for sealing, preventing the sealing performance from decreasing, avoiding oil leakage and the entry of explosive gases or dust, preventing the motor explosion from affecting the safety performance of the vehicle, and thus improving the safety of the vehicle and the vehicle users.

[0054] Finally: The above are only the preferred embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An explosion-proof motor, comprising a motor main body, wherein the motor main body is provided with an output shaft, end covers, an end shield and a junction box, and is characterized in that: A plurality of power components are arranged on the end cover, a cooling and dust cleaning component is arranged on the power component, a pulling-back component is arranged at the end of the cooling and dust cleaning component, and a sealing component is arranged inside the end cover; The sealing component includes a sealing block arranged inside the end cover. A sealing ring is sleeved between the sealing block and the output shaft. The contact point between the sealing ring and the output shaft is set as a sealing lip. An adjustment groove is formed inside the sealing ring. An elastic hoop is sleeved inside the adjustment groove. An expansion chamber is formed inside the sealing ring.

2. The explosion-proof motor according to claim 1, wherein: An adjustment cavity is formed inside the sealing ring. An adjustment block is slidably connected inside the adjustment cavity. A second elastic member is connected between one end of the adjustment block and the adjustment cavity. A communication port is formed between the adjustment cavity and the expansion chamber. An air storage groove is formed inside the adjustment block. An air injection hole communicating the adjustment cavity and the expansion chamber is formed inside the sealing ring. An exhaust hole and an exhaust passage communicating with the air storage groove are formed on the outer peripheral side of the adjustment block. A throttling passage is formed on one side of the adjustment cavity away from the motor main body.

3. An explosion-proof motor according to claim 2, characterized in that: The adjustment groove is of an inclined structure. When the expansion chamber expands, it can squeeze the adjustment groove to change the angle of the adjustment groove, and push the elastic hoop to move inside the adjustment groove to further squeeze the sealing lip; When the gas in the expansion chamber is saturated, the gas will enter the adjustment cavity through the communication port and cooperate with the second elastic member to squeeze the adjustment block, so that the exhaust passage is communicated with the throttling passage to discharge the redundant gas. When the air pressure in the expansion chamber decreases, the gas in the air storage groove will squeeze the second elastic member to move through the adjustment block, so that the air injection hole is communicated with the exhaust hole, and the gas enters the expansion chamber.

4. An explosion-proof motor according to claim 3, characterized in that: The cooling and dust cleaning component includes a support cylinder arranged on the outer peripheral side of the motor main body. An air blowing port is formed on one side of the support cylinder close to the motor main body. One end of the support cylinder away from the power component is fixedly connected to the motor main body through a fixing rod.

5. An explosion-proof motor according to claim 4, characterized in that: A gas collecting chamber is formed at one end of the support cylinder away from the power component. The gas collecting chamber is arranged in an off-axis manner. A rotating block is rotatably connected inside the gas collecting chamber. The rotating block is arranged eccentrically with respect to the gas collecting chamber. A plurality of first sliding grooves are formed inside the rotating block and are distributed at equal intervals in a circumferential manner. A sliding blade is slidably connected inside each first sliding groove. An air inlet communicating with the inside of the gas collecting chamber is formed on the outer wall of one end of the support cylinder. An air outlet is formed inside the fixing rod. A gas supply passage is formed between the air outlet and the adjustment cavity.

6. An explosion-proof motor according to claim 5, characterized in that: The power component includes a sprocket housing fixedly connected to the end cover. A rotating rod is rotatably connected to the center inside the sprocket housing. One end of the rotating rod close to the end cover is fixedly connected to one end of the output shaft. A toothless sprocket is fixedly connected to the outer wall of the rotating rod. A plurality of driven rotating rods are rotatably connected inside the sprocket housing. A double-row sprocket is fixedly connected to the outer wall of each driven rotating rod. The double-row sprocket is meshed with the toothless sprocket.

7. An explosion-proof motor according to claim 6, characterized in that: A plurality of connecting covers arranged at equal circumferential intervals are fixedly connected to the outer side of the sprocket housing. One end of each connecting cover away from the sprocket housing is fixedly connected to the support cylinder in each group of the cooling and dust-removing assemblies. A linkage rod is rotatably connected in each connecting cover. A first sprocket and a second sprocket are fixedly connected to the outer wall of each linkage rod. The first sprocket is connected to the double-row sprocket through a chain.

8. An explosion-proof motor according to claim 7, characterized in that: A plurality of partition plates are arranged in the support cylinder. The interior of the support cylinder is divided into a plurality of installation chambers by the plurality of partition plates. A rotating rod is rotatably connected in the support cylinder. A rotating fan fixedly connected to the rotating rod is rotatably connected in each installation chamber of the support cylinder. One end of the rotating rod located inside the air collecting chamber is fixedly connected to the rotating block. A third sprocket is fixedly connected to one end of the rotating rod close to the power assembly. The third sprocket is meshed and connected to the corresponding second sprocket.

9. An explosion-proof motor according to claim 8, characterized in that: The pulling-back assembly includes a support rod fixedly connected to one end of the support cylinder away from the power assembly. The other end of the support rod is fixedly connected to the end cover. A winding wheel fixedly connected to the rotating rod is rotatably connected in the support rod.

10. An explosion-proof motor according to claim 9, characterized in that: A second sliding groove is formed in the support rod. A baffle is slidably connected in the second sliding groove. A first elastic member is arranged in the second sliding groove. One end of the first elastic member is connected to the second sliding groove. The other end of the first elastic member is connected to the side of the baffle away from the end cover. A pull rope is arranged between the winding wheel and the baffle.

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