Gear box with multi-stage heat dissipation structure

Abstract

The invention relates to the technical field of gear boxes, and provides a gear box with a multi-stage heat dissipation structure, which comprises a box body, a working cavity is formed in the bottom end of the inner side of the box body, a gear set is arranged on the inner side of the working cavity, a heat dissipation cavity is formed in the top end of the inner side of the box body, and a communication groove communicated with the working cavity is formed in one end of the heat dissipation cavity; the outlet end of the oil return pipe is fixedly connected with a filter box, a filter screen is arranged on the inner side of the filter box, an oil pump is fixedly installed on the outer side of the box body, the inlet end of the oil pump is communicated with the bottom of the filter box, a cleaning mechanism is arranged above the filter screen, and a first-stage cooling coil pipe is fixedly connected to the inner side of the heat dissipation cavity; a negative pressure mechanism is arranged at the outlet end of the first-stage cooling coil, and an air cooling mechanism is arranged at the outlet end of the negative pressure mechanism. The secondary air cooling design of the cooling water solves the problem that the heat dissipation capacity is reduced after a single water cooling system operates for a long time, the stable heat exchange efficiency is maintained, and the system is particularly suitable for high-speed and high-load working conditions.

Description

Technical Field

[0001] The present invention relates to the technical field of gear boxes, and in particular to a gear box with a multi-stage heat dissipation structure. Background Art

[0002] The gearbox is an important component of the transmission system. The main function of the gearbox is to transmit the power generated by the engine to the working parts. The gearbox plays the role of controlling, regulating and distributing power in the power system. Commonly used gearboxes usually use gear lubricants to lubricate and cool them, thereby improving the operating efficiency of the gearbox. The gearbox will generate a lot of heat energy during operation, which will cause the physical properties of the gear components to change. The high temperature environment has a significant impact on the wear of the gears. Therefore, for high-speed running gears, an adaptive cooling system needs to be installed.

[0003] However, the existing gearbox heat dissipation solutions have the following main defects: First, common solutions rely on natural heat dissipation from the box or a single air-cooling structure, which has limited heat dissipation capacity. Under high-temperature conditions, heat cannot be quickly dissipated during the lubricating oil circulation cooling, causing the oil temperature to continue to rise. Second, impurities such as metal debris are easily mixed into the lubricating oil during repeated circulation. If the filter is not cleaned in time after the accumulation of dirt, the oil flow rate will be greatly reduced, and even the cooling cycle will be interrupted; Third, in some solutions that use cooling water to assist in heat dissipation, the cooling water's own temperature rises after absorbing heat, and there is a lack of a secondary cooling mechanism. After long-term operation, the heat dissipation efficiency is significantly attenuated.

[0004] In view of this, the present invention proposes a gearbox with a multi-stage heat dissipation structure. Summary of the Invention

[0005] The present invention provides a gear box with a multi-stage heat dissipation structure, which solves the problem of poor heat dissipation effect of a single air-cooling structure in the prior art.

[0006] The technical solution of the present invention is as follows: A gear box with a multi-stage heat dissipation structure includes a box body, a working chamber is formed at the bottom end of the inner side of the box body, a gear set is arranged inside the working chamber, a heat dissipation chamber is formed at the top end of the inner side of the box body, a connecting groove is formed at one end of the heat dissipation chamber and communicates with the working chamber, an oil return pipe is fixedly connected to the other end of the heat dissipation chamber, an outlet end of the oil return pipe is fixedly connected to a filter box, a filter screen is arranged inside the filter box, an oil pump is fixedly installed on the outside of the box body, the inlet end of the oil pump is connected to the bottom of the filter box, the outlet end of the oil pump is connected to the inside of the working chamber through a conduit, a cleaning mechanism for cleaning the surface of the filter screen is arranged above the filter screen, a first-level cooling coil filled with cooling water is fixedly connected to the inner side of the heat dissipation chamber, a negative pressure mechanism is provided at the outlet end of the first-level cooling coil to pump out cooling water by cooperating with the activation of the cleaning mechanism, an air cooling mechanism is provided at the outlet end of the negative pressure mechanism, and the outlet end of the air cooling mechanism is connected to the inlet end of the first-level cooling coil.

[0007] Preferably, the cleaning mechanism includes a reciprocating screw rod rotatably connected to the inner side of the filter box, a first motor is fixedly installed on one side of the filter box, the output shaft of the first motor is fixedly connected to the reciprocating screw rod, a slider is threadedly connected to the reciprocating screw rod, the bottom of the slider is fixedly connected to a vertical rod, the bottom of the vertical rod is fixedly connected to a scraper, and the scraper is slidably connected to the top wall of the filter screen.

[0008] Preferably, the negative pressure mechanism includes a cylinder fixedly connected to the outside of the box body, one end of the cylinder is slidably connected to a push-pull rod passing through the side wall of the cylinder, one end of the push-pull rod is fixedly connected to a piston, the piston is slidably connected to the inner wall of the cylinder, the inlet end of the cylinder is fixedly connected to a water inlet pipe, the inlet end of the water inlet pipe is connected to the outlet end of the first-level cooling coil, the outlet end of the cylinder is fixedly connected to a water outlet pipe, the outlet end of the water outlet pipe is connected to the air cooling mechanism, and the other end of the push-pull rod is provided with a linkage part that drives the push-pull rod to slide back and forth by cooperating with the rotation of the reciprocating screw.

[0009] Preferably, a water inlet one-way valve is fixedly connected to the water inlet pipe, and a water outlet one-way valve is fixedly connected to the water outlet pipe.

[0010] Preferably, the linkage includes an eccentric wheel rotatably connected to the outside of the box body, the outer edge of the eccentric wheel is rotatably connected to a connecting rod, the end of the connecting rod away from the eccentric wheel is hinged to a connecting seat, and one side of the connecting seat is fixedly connected to the end of the push-pull rod.

[0011] Preferably, the linkage member further includes a first gear coaxially fixedly connected to the eccentric wheel, one end of the reciprocating screw is fixedly connected to a second gear, and the second gear is meshed with the first gear.

[0012] Preferably, the gear ratio between the first gear and the second gear is 1:10.

[0013] Preferably, the air cooling mechanism includes a bellows fixedly connected to the outside of the box body, a secondary cooling pipe is fixedly connected to the inner side of the bellows, the inlet end of the secondary cooling pipe is connected to the water outlet pipe, the outlet end of the secondary cooling pipe is connected to the inlet end of the primary cooling coil, and an air suction piece for introducing cold air is provided on one side of the bellows, and a plurality of evenly distributed air outlet holes are opened at one end of the top of the bellows.

[0014] Preferably, the air suction member includes a mounting sleeve fixedly connected to the outside of the bellows, one end of the inner side of the bellows is fixedly connected to a bracket, a second motor is fixedly installed on the inner side of the bracket, and the output shaft of the second motor is fixedly connected to the air suction impeller.

[0015] The working principle and beneficial effects of the present invention are: 1. High-temperature lubricating oil enters the heat dissipation cavity through the connecting groove and directly exchanges heat with the built-in first-stage cooling coil. The cooling water absorbs the heat of the oil, achieving the first efficient cooling and avoiding gear wear caused by the continuous increase in oil temperature. The heated cooling water is pumped into the second-stage cooling pipe of the air cooling mechanism through the negative pressure mechanism, and the cold air is forced into the suction impeller for secondary heat exchange. After the cooling water temperature drops, it can re-enter the first-stage coil circulation, forming a closed-loop cooling system to ensure continuous heat dissipation efficiency.

[0016] 2. The cleaning mechanism drives the reciprocating screw through the first motor, driving the scraper to periodically scrape impurities on the surface of the filter screen to avoid oil circuit blockage caused by accumulation of metal debris, ensuring the stability of the lubricating oil flow rate and circulation continuity. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] Figure 1 A schematic diagram of the structure of a gearbox with a multi-stage heat dissipation structure according to the present invention Figure 1 ; Figure 2 A schematic diagram of the structure of a gearbox with a multi-stage heat dissipation structure according to the present invention Figure 2 ; Figure 3 A schematic diagram of the structure of a gearbox with a multi-stage heat dissipation structure according to the present invention Figure 3 ; Figure 4 It is a structural schematic diagram of the cleaning mechanism of the present invention; Figure 5 Schematic diagram of the structure of the negative pressure mechanism of the present invention; Figure 6 It is a structural schematic diagram of the linkage member of the present invention; Figure 7 It is a structural schematic diagram of the air cooling mechanism of the present invention; Figure 8 It is a structural schematic diagram of the air suction member of the present invention.

[0019] In the figure: 1. Box; 101. Working chamber; 102. Heat dissipation chamber; 103. Connecting groove; 2. Gear set; 3. Oil pump; 4. Oil return pipe; 5. Filter box; 51. Filter screen; 52. Cleaning mechanism; 521. Reciprocating screw; 522. First motor; 523. Slider; 524. Vertical rod; 525. Scraper; 6. First cooling coil; 7. Negative pressure mechanism; 71. Cylinder; 72. Push-pull rod; 73. Piston; 74. Water inlet pipe; 75. Water outlet pipe; 76. Water inlet one-way valve; 77. Water outlet one-way valve; 78. Linkage; 781. Eccentric wheel; 782. Connecting rod; 783. Connecting seat; 784. First gear; 785. Second gear; 8. Air cooling mechanism; 81. Bellows; 82. Secondary cooling pipe; 83. Air suction member; 831. Mounting sleeve; 832. Bracket; 833. Second motor; 834. Air suction impeller; 84. Air outlet. DETAILED DESCRIPTION

[0020] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described 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 making any creative efforts are within the scope of protection of the present invention.

[0021] like Figures 1 to 8 As shown, this embodiment proposes a gearbox with a multi-stage heat dissipation structure, including a box body 1, a working chamber 101 is opened at the bottom end of the inner side of the box body 1, a gear set 2 is arranged inside the working chamber 101, a heat dissipation chamber 102 is opened at the top end of the inner side of the box body 1, a connecting groove 103 communicating with the working chamber 101 is opened at one end of the heat dissipation chamber 102, an oil return pipe 4 is fixedly connected to the other end of the heat dissipation chamber 102, a filter box 5 is fixedly connected to the outlet end of the oil return pipe 4, a filter screen 51 is arranged inside the filter box 5, and an oil pump 3 is fixedly installed on the outside of the box body 1. The inlet end of the oil pump 3 is connected to the bottom of the filter box 5, and the outlet end of the oil pump 3 is connected to the inside of the working chamber 101 through a conduit. A cleaning mechanism 52 for cleaning the surface of the filter 51 is provided above the filter 51. The inner side of the heat dissipation chamber 102 is fixedly connected to a primary cooling coil 6 filled with cooling water. The outlet end of the primary cooling coil 6 is provided with a negative pressure mechanism 7 for extracting the cooling water by cooperating with the start-up of the cleaning mechanism 52. The outlet end of the negative pressure mechanism 7 is provided with an air cooling mechanism 8. The outlet end of the air cooling mechanism 8 is connected to the inlet end of the primary cooling coil 6.

[0022] The oil is introduced into the working chamber 101 through the oil pump 3 to cool the gear set 2, and then the oil that absorbs heat and heats up is introduced into the heat dissipation chamber 102 through the connecting groove 103 and collides with the primary cooling coil 6, so that the high-temperature oil exchanges heat with the cooling water inside the primary cooling coil 6, thereby cooling the oil, and then the cooled oil is introduced into the filter box 5 through the return oil pipe 4, filtered by the filter 51, and then introduced into the working chamber 101 again through the oil pump 3 to cool the gear set 2 for secondary cooling. In this cycle, the oil can circulate to cool the gear set 2, thereby greatly improving the heat dissipation effect of the gear set 2.

[0023] Furthermore, the cleaning mechanism 52 includes a reciprocating screw rod 521 rotatably connected to the inner side of the filter box 5, a first motor 522 is fixedly installed on one side of the filter box 5, the output shaft of the first motor 522 is fixedly connected to the reciprocating screw rod 521, a slider 523 is threadedly connected to the reciprocating screw rod 521, the bottom of the slider 523 is fixedly connected to a vertical rod 524, the bottom of the vertical rod 524 is fixedly connected to a scraper 525, and the scraper 525 is slidably connected to the top wall of the filter screen 51.

[0024] By starting the first motor 522 to drive the reciprocating screw 521 to rotate, the slider 523 slides back and forth along the axis of the reciprocating screw 521, which causes the vertical rod 524 to drive the scraper 525 to slide back and forth on the top wall of the filter 51, so that the scraper 525 cleans the impurities attached to the filter 51, avoiding the problem of impurities accumulating on the filter 51 and causing the filter holes to be clogged.

[0025] Furthermore, the negative pressure mechanism 7 includes a cylinder 71 fixedly connected to the outside of the box body 1, one end of the cylinder 71 is slidably connected to a push-pull rod 72 that passes through the side wall of the cylinder 71, one end of the push-pull rod 72 is fixedly connected to a piston 73, and the piston 73 is slidably connected to the inner wall of the cylinder 71, the inlet end of the cylinder 71 is fixedly connected to a water inlet pipe 74, the inlet end of the water inlet pipe 74 is connected to the outlet end of the first-stage cooling coil 6, the outlet end of the cylinder 71 is fixedly connected to a water outlet pipe 75, the outlet end of the water outlet pipe 75 is connected to the air cooling mechanism 8, the water inlet pipe 74 is fixedly connected to a water inlet one-way valve 76, the water outlet pipe 75 is fixedly connected to a water outlet one-way valve 77, and the other end of the push-pull rod 72 is provided with a linkage part 78 that drives the push-pull rod 72 to slide back and forth by cooperating with the rotation of the reciprocating screw 521.

[0026] The linkage member 78 includes an eccentric wheel 781 rotatably connected to the outside of the box body 1, and the outer edge of the eccentric wheel 781 is rotatably connected to a connecting rod 782. The end of the connecting rod 782 away from the eccentric wheel 781 is hinged to a connecting seat 783, and one side of the connecting seat 783 is fixedly connected to the end of the push-pull rod 72. The eccentric wheel 781 is coaxially fixedly connected to a first gear 784, and one end of the reciprocating screw rod 521 is fixedly connected to a second gear 785. The second gear 785 is meshed with the first gear 784, and the gear ratio of the first gear 784 to the second gear 785 is 1:10.

[0027] By starting the first motor 522 to drive the reciprocating screw 521 to rotate, the second gear 785 rotates synchronously, which makes the first gear 784 drive the eccentric wheel 781 to rotate, so that the connecting rod 782 drives the connecting seat 783 and the push-pull rod 72 to slide back and forth, which makes the piston 73 slide back and forth inside the cylinder 71, so that the pressure inside the cylinder 71 intermittently increases and decreases. When the pressure inside the cylinder 71 decreases, the water inlet pipe 74 extracts the cooling water inside the primary cooling coil 6 and introduces it into the cylinder 71. When the pressure inside the cylinder 71 increases, the water outlet pipe 75 guides the cooling water inside the cylinder 71. In this cycle, the water outlet pipe 75 can intermittently introduce the cooling water into the air cooling mechanism 8 for secondary cooling, so that the cooling water and the air exchange heat. Furthermore, the air cooling mechanism 8 includes a bellows 81 fixedly connected to the outside of the box body 1, and a secondary cooling pipe 82 is fixedly connected to the inner side of the bellows 81. The inlet end of the secondary cooling pipe 82 is connected to the water outlet pipe 75, and the outlet end of the secondary cooling pipe 82 is connected to the inlet end of the primary cooling coil 6. A suction member 83 for introducing cold air is provided on one side of the bellows 81. The suction member 83 includes a mounting sleeve 831 fixedly connected to the outside of the bellows 81, one end of the inner side of the bellows 81 is fixedly connected to a bracket 832, and a second motor 833 is fixedly installed on the inner side of the bracket 832, and the output shaft of the second motor 833 is fixedly connected to an air suction impeller 834; a plurality of evenly distributed air outlet holes 84 are opened at one end of the top of the bellows 81.

[0028] Working principle: The oil is introduced into the working chamber 101 through the oil pump 3 to cool the gear set 2. The oil that absorbs heat and heats up is then introduced into the heat dissipation chamber 102 through the connecting groove 103 and collides with the primary cooling coil 6. In this way, the high-temperature oil exchanges heat with the cooling water inside the primary cooling coil 6, thereby cooling the oil. The cooled oil is then introduced into the filter box 5 through the return oil pipe 4. After being filtered by the filter 51, the oil is again introduced into the working chamber 101 through the oil pump 3 to cool the gear set 2 for a second time. In this cycle, the oil can circulate to cool the gear set 2. By starting the first motor 522 to drive the reciprocating screw 521 to rotate, the second gear 785 rotates synchronously, which makes the first gear 784 drive the eccentric wheel 781 to rotate, so that the connecting rod 782 drives the connecting seat 783 and the push-pull rod 72 to slide back and forth, which makes the piston 73 slide back and forth inside the cylinder 71, so that the pressure inside the cylinder 71 increases and decreases intermittently. When the pressure inside the cylinder 71 decreases, the water inlet pipe 74 extracts the cooling water inside the first-level cooling coil 6 and introduces it into the cylinder 71. When the pressure inside the cylinder 71 increases, the water outlet pipe 75 draws out the cooling water inside the cylinder 71. Circulation, the water outlet pipe 75 can intermittently introduce the cooling into the interior of the secondary cooling pipe 82, and at the same time start the second motor 833 to drive the suction impeller 834 to rotate, so that the mounting sleeve 831 sucks the external cold air into the interior of the bellows 81, and then contacts the cold air through the secondary cooling pipe 82, so that the cooling water and the cold air exchange heat, thereby cooling the cooling water, and then re-introduced into the interior of the primary cooling coil 6 through the secondary cooling pipe 82 to cool the oil, thereby ensuring that the cooling water can continuously cool the oil, and then the oil continues to cool the gear, group 2, further improving the heat dissipation effect of the gear group 2.

[0029] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A gearbox with a multi-stage heat dissipation structure, comprising a box body (1), a working chamber (101) being provided at the bottom end of the inner side of the box body (1), a gear set (2) being provided inside the working chamber (101), and characterized in that: A heat dissipation cavity (102) is provided at the top of the inner side of the box body (1), a communication groove (103) communicating with the working cavity (101) is provided at one end of the heat dissipation cavity (102), an oil return pipe (4) is fixedly connected to the other end of the heat dissipation cavity (102), an outlet end of the oil return pipe (4) is fixedly connected to a filter box (5), a filter screen (51) is provided on the inner side of the filter box (5), an oil pump (3) is fixedly installed on the outer side of the box body (1), an inlet end of the oil pump (3) is connected to the bottom of the filter box (5), and an outlet end of the oil pump (3) is connected to the bottom of the filter box (5). The conduit is connected to the inside of the working chamber (101); a cleaning mechanism (52) for cleaning the surface of the filter (51) is provided above the filter (51); a first-stage cooling coil (6) filled with cooling water is fixedly connected to the inside of the heat dissipation chamber (102); a negative pressure mechanism (7) for extracting cooling water by cooperating with the start of the cleaning mechanism (52) is provided at the outlet end of the first-stage cooling coil (6); an air cooling mechanism (8) is provided at the outlet end of the negative pressure mechanism (7); and the outlet end of the air cooling mechanism (8) is connected to the inlet end of the first-stage cooling coil (6).

2. The gearbox with a multi-stage heat dissipation structure according to claim 1, characterized in that: The cleaning mechanism (52) comprises a reciprocating screw (521) rotatably connected to the inner side of the filter box (5); a first motor (522) is fixedly mounted on one side of the filter box (5); an output shaft of the first motor (522) is fixedly connected to the reciprocating screw (521); a slider (523) is threadedly connected to the reciprocating screw (521); a vertical rod (524) is fixedly connected to the bottom of the slider (523); a scraper (525) is fixedly connected to the bottom of the vertical rod (524); and the scraper (525) is slidably connected to the top wall of the filter screen (51).

3. The gearbox with a multi-stage heat dissipation structure according to claim 2, characterized in that: The negative pressure mechanism (7) includes a cylinder (71) fixedly connected to the outside of the box (1), one end of the cylinder (71) is slidably connected to a push-pull rod (72) penetrating the side wall of the cylinder (71), one end of the push-pull rod (72) is fixedly connected to a piston (73), and the piston (73) is slidably connected to the inner wall of the cylinder (71), the inlet end of the cylinder (71) is fixedly connected to a water inlet pipe (74), the inlet end of the water inlet pipe (74) is connected to the outlet end of the first-stage cooling coil (6), the outlet end of the cylinder (71) is fixedly connected to a water outlet pipe (75), and the outlet end of the water outlet pipe (75) is connected to the air cooling mechanism (8), and the other end of the push-pull rod (72) is provided with a linkage member (78) that drives the push-pull rod (72) to slide back and forth by cooperating with the rotation of the reciprocating screw (521).

4. The gearbox with a multi-stage heat dissipation structure according to claim 3, characterized in that: The water inlet pipe (74) is fixedly connected to a water inlet check valve (76), and the water outlet pipe (75) is fixedly connected to a water outlet check valve (77).

5. The gearbox with a multi-stage heat dissipation structure according to claim 4, characterized in that: The linkage member (78) includes an eccentric wheel (781) rotatably connected to the outside of the box body (1); the outer edge of the eccentric wheel (781) is rotatably connected to a connecting rod (782); one end of the connecting rod (782) away from the eccentric wheel (781) is hinged to a connecting seat (783); one side of the connecting seat (783) is fixedly connected to the end of the push-pull rod (72).

6. The gearbox with a multi-stage heat dissipation structure according to claim 5, characterized in that: The linkage member (78) further includes a first gear (784) coaxially fixedly connected to the eccentric wheel (781), one end of the reciprocating screw (521) is fixedly connected to a second gear (785), and the second gear (785) is meshed with the first gear (784).

7. The gearbox with a multi-stage heat dissipation structure according to claim 6, characterized in that: The gear ratio between the first gear (784) and the second gear (785) is 1:

10.

8. The gearbox with a multi-stage heat dissipation structure according to claim 3, characterized in that: The air cooling mechanism (8) includes a bellows (81) fixedly connected to the outside of the box body (1), a secondary cooling pipe (82) fixedly connected to the inside of the bellows (81), an inlet end of the secondary cooling pipe (82) is connected to the water outlet pipe (75), and an outlet end of the secondary cooling pipe (82) is connected to the inlet end of the primary cooling coil (6), an air suction member (83) for introducing cold air is provided on one side of the bellows (81), and a plurality of evenly distributed air outlet holes (84) are provided at one end of the top of the bellows (81).

9. The gearbox with a multi-stage heat dissipation structure according to claim 8, characterized in that: The air suction member (83) comprises a mounting sleeve (831) fixedly connected to the outside of the bellows (81); one end of the inside of the bellows (81) is fixedly connected to a bracket (832); a second motor (833) is fixedly mounted on the inside of the bracket (832); and an output shaft of the second motor (833) is fixedly connected to a suction impeller (834).

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