Gear box of helical gear

Abstract

The utility model discloses a gear box of a bevel gear, which belongs to the technical field of gear boxes and comprises a box body, an opening is arranged on the back of the box body, a box cover is detachably mounted at the position of the opening, and a mounting seat is fixedly mounted on the outer surface of the box body. A first helical cylindrical gear, a second helical cylindrical gear and a third helical cylindrical gear are arranged to replace a straight gear transmission structure in a traditional gearbox, the meshing process between gear teeth of the helical cylindrical gears is a transition process, and stress on the gear teeth is gradually increased and then gradually decreased; the helical gear is suitable for high-speed and heavy-load conditions, the meshing time of the helical spur gear is long, the contact area is large, then stress is reduced, transmission is stable, the meshing time is long, the contact ratio is increased, the bearing capacity of the gear is increased, the service life of the gear is prolonged, the minimum tooth number is reduced due to the arrangement of the helical spur gear, and the service life of the gear is prolonged. Therefore, the structure is compact and weight is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of gearboxes, and particularly relates to a gearbox with helical gears. Background Art

[0002] A gearbox is an important component widely used in mechanical transmissions. A gearbox is a mechanical transmission device used to convert the rotational speed and torque of an input shaft into different rotational speeds and torques of an output shaft. It consists of a set of gears that transmit force and motion through gear meshing and rotation. The main function of a gearbox is to change the transmission of rotational speed and torque, and it is commonly used in mechanical systems such as automobiles, industrial machinery, ships, and wind turbines. By selecting different sizes and types of gear combinations, a gearbox can achieve different output speeds and torques to meet different application requirements. The working principle of a gearbox is based on the meshing between gears. When the gear on the input shaft rotates, it drives the rotation of the adjacent gear, thereby transmitting power and motion. The size and number of teeth of the gears determine the rotational speed and torque of the output shaft. By changing the size and combination method of the gears, different transmission ratios can be achieved to meet different application requirements. In addition, a gearbox can also provide various transmission modes such as forward transmission, reverse transmission, and neutral no transmission. Some advanced gearboxes have a design with multiple gear cascades to provide a larger range of transmission ratios and higher efficiency.

[0003] Chinese Patent (Publication No.: CN218510097U) discloses a reduction gearbox that uses spur gears in cooperation with a worm, belonging to the technical field of reduction equipment. The utility model includes a power output component, a reduction gear component, a driving motor, and a box body. The power output component and the reduction gear component are fixedly arranged in the box body. The power output component is meshed and connected with the reduction gear component. The driving motor is provided with a motor shaft, and the motor shaft is provided with a worm fixedly connected thereto. The worm extends into the box body. The reduction gear component includes a first-stage reduction gear, and the first-stage reduction gear is a spur gear. The worm is vertically meshed and connected with the first-stage reduction gear, which improves the transmission efficiency, realizes the self-locking function at a large lead angle, greatly reduces the heat generation degree of the worm, improves the stability of the reduction gearbox, and improves the service life of the motor.

[0004] Chinese Patent (Publication No.: CN202402572U) proposes a small gearbox, which includes a housing, a bottom plate, a cover plate, an output shaft, a first spur gear transmission assembly, a second spur gear transmission assembly, and an output spur gear fixed on the output shaft; the first spur gear transmission assembly further includes a first transmission shaft and multiple groups of first spur gears rotatably installed on the first transmission shaft; the second spur gear transmission assembly includes a second transmission shaft and multiple groups of second spur gears rotatably installed on the second transmission shaft; the first transmission shaft and the second transmission shaft respectively pass through the partition and are fixedly installed between the bottom plate and the cover plate; the output shaft is rotatably installed between the partition and the cover plate of the housing and passes through the central through hole of the cover plate; the gears of each group in the first spur gear transmission assembly and the second spur gear transmission assembly mesh with each other; a group of gears in the first spur gear transmission assembly meshes with the output spur gear on the output shaft. It has the advantages of small volume, compact structure, low cost, reliable performance, and high production efficiency.

[0005] The gearbox structures proposed by the above devices all use traditional straight-tooth structures. Straight teeth have characteristics such as strong load-bearing capacity and durability. However, when the gears have problems such as large module and broken teeth, it is not convenient to measure the outside diameter of the tooth tip, which is likely to cause impact and noise, and the transmission smoothness is poor. Therefore, we propose a gearbox with helical gears. Summary of the Utility Model

[0006] The purpose of the present utility model is to provide a gearbox with helical gears to solve the problems raised in the above background technology.

[0007] To achieve the above purpose, the present utility model provides the following technical solution: A gearbox with helical gears, including a box body, the back surface of the box body has an opening and a box cover is detachably installed at the opening position, the outer surface of the box body is fixedly installed with a mounting seat, several mounting bolts are penetrated through the mounting seat, a first rotating shaft is rotatably installed on the box body, a second rotating shaft is rotatably installed on the box cover, the first rotating shaft and the second rotating shaft are arranged opposite to each other and connection flange plates are fixedly installed at the mutually remote ends of the first rotating shaft and the second rotating shaft, one end of the first rotating shaft located inside the box body is fixedly installed with a mounting disc, a first helical cylindrical gear is fixedly installed on the side surface of the mounting disc, one end of the second rotating shaft located inside the box body is fixedly installed with a second helical cylindrical gear, several connecting shafts are rotatably installed on the side surface of the box cover, a third helical cylindrical gear is fixedly installed on the outer surface of the connecting shaft, the third helical cylindrical gear is located between the first helical cylindrical gear and the second helical cylindrical gear and meshes with the first helical cylindrical gear and the second helical cylindrical gear, two heat dissipation shells are penetrated and installed on the box body, a heat dissipation fan is fixedly installed inside the heat dissipation shell, the surface of the heat dissipation shell has ventilation openings and ventilation filters are detachably installed at the ventilation opening positions, and the heat dissipation fans inside the two heat dissipation shells are an intake fan and an exhaust fan respectively.

[0008] By adopting the above scheme, the first helical cylindrical gear, the second helical cylindrical gear and the third helical cylindrical gear are arranged to replace the spur gear transmission structure in the traditional gear box. The meshing process between the gear teeth of the helical cylindrical gear is a transitional process, and the force on the gear teeth gradually increases from small to large and then from large to small; the helical gear is suitable for high speed and heavy load conditions, the helical cylindrical gear has a long meshing time and a large contact area, thereby reducing the stress and making the transmission smooth, and the long meshing time increases the overlap, thereby increasing the bearing capacity of the gear, thereby extending the service life of the gear, and the setting of the helical cylindrical gear reduces the minimum number of teeth, so the structure is compact and the weight is reduced, and a heat dissipation shell is arranged and a heat dissipation fan in the heat dissipation shell is used to accelerate the gas circulation in the box body, thereby accelerating the heat dissipation, and the ventilation filter can be used to filter the inlet and outlet gases to prevent dust from entering the box body, and the heat dissipation can be further enhanced by using a thermal conductive copper ring in combination with a heat dissipation fin, and the ventilation filter can be conveniently disassembled and assembled for easy cleaning.

[0009] As a preferred embodiment, a plurality of supporting rollers are fixedly mounted on the inner wall of the box body, and the wheels of the supporting rollers are arranged in close contact with the outer surface of the first helical cylindrical gear.

[0010] By adopting the above solution, the wheel of the supporting roller fits with the surface of the first helical cylindrical gear, and the supporting roller can support the rotation of the first helical cylindrical gear to avoid shaking when the first helical cylindrical gear rotates.

[0011] As a preferred embodiment, a heat-conducting copper ring is fixedly installed on the inner wall of the box body, and the heat-conducting copper ring is sleeved on the outer surface of the first helical cylindrical gear. A plurality of cooling fins are fixedly installed on the outer surface of the heat-conducting copper ring, and the cooling fins are penetrated through the box body and extend out of the box body.

[0012] By adopting the above solution, the heat-conducting copper ring can conduct the heat generated when the first helical cylindrical gear rotates, and transmit it through multiple heat dissipation fins, thereby accelerating the heat conduction and dissipation and improving the heat dissipation efficiency.

[0013] As a preferred embodiment, a plurality of connecting screws are fixedly installed on the back of the box body, and a through hole is opened on the box cover at a position opposite to the connecting screws. The connecting screw passes through the through hole and a connecting nut is threadedly installed on the outer surface of the connecting screw, and the connecting nut is fit-fittingly arranged on the side of the box cover.

[0014] By adopting the above scheme, the connecting screw passes through the through hole and is used in conjunction with the connecting nut, so that a convenient locking operation of the box body and the box cover can be achieved. The locking structure is simple, and the threaded connection has good stability and is not easy to loosen.

[0015] As a preferred embodiment, an elastic plate is fixedly mounted on the side of the ventilation filter, a wedge-shaped clamping plate is fixedly mounted on the side of the elastic plate, and a wedge-shaped clamping groove for the wedge-shaped clamping plate to be clamped into is provided on the side of the heat dissipation shell.

[0016] By adopting the above solution, the elastic plate is used in conjunction with the wedge-shaped clamping plate, which facilitates the assembly operation of the ventilation filter and the heat dissipation shell.

[0017] As a preferred embodiment, a plurality of alignment guide rods are fixed on the surface of the heat dissipation shell, and alignment guide holes used in conjunction with the alignment guide rods are provided at positions on the ventilation filter corresponding to the alignment guide rods.

[0018] By adopting the above scheme, the alignment guide rod and the alignment guide hole are used in combination to facilitate the alignment assembly of the ventilation filter, so that the wedge-shaped clamping plate on the elastic plate on the side of the ventilation filter can be more accurately inserted into the wedge-shaped clamping groove.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] The gearbox of the helical gear replaces the spur gear transmission structure in the traditional gearbox by setting the first helical cylindrical gear, the second helical cylindrical gear and the third helical cylindrical gear. The meshing process between the gear teeth of the helical cylindrical gear is a transitional process, and the force on the gear teeth gradually increases from small to large and then from large to small; the helical gear is suitable for high speed and heavy load conditions. The helical cylindrical gear has a long meshing time and a large contact area, which reduces the stress and makes the transmission stable. The long meshing time increases the overlap, which increases the bearing capacity of the gear, thereby extending the service life of the gear. The setting of the helical cylindrical gear reduces the minimum number of teeth, so the structure is compact and the weight is reduced.

[0021] The gearbox of the helical gear is provided with a heat dissipation shell, and a heat dissipation fan in the heat dissipation shell is used to accelerate the gas circulation in the box body, thereby accelerating the heat dissipation. The ventilation filter can be used to filter the incoming and outgoing gases to prevent dust from entering the box body. The heat dissipation can be further enhanced by using a thermal conductive copper ring in combination with heat dissipation fins. At the same time, the ventilation filter can be conveniently disassembled and assembled for easy cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the utility model;

[0023] Figure 2 For this utility model Figure 1 A schematic diagram of the structure from another angle;

[0024] Figure 3 It is a structural schematic diagram of the box body of the utility model;

[0025] Figure 4 For this utility model Figure 3Structural schematic diagram from another angle;

[0026] Figure 5 Structural schematic diagram of the box cover of the present utility model;

[0027] Figure 6 Structural schematic diagram of the first helical cylindrical gear, the second helical cylindrical gear and the third helical cylindrical gear of the present utility model;

[0028] Figure 7 Exploded schematic diagram of the heat dissipation shell and the ventilation filter screen of the present utility model;

[0029] Figure 8 Structural schematic diagram of the ventilation filter screen of the present utility model.

[0030] In the figure: 1, box body; 2, box cover; 3, mounting seat; 4, mounting bolt; 5, first rotating shaft; 6, second rotating shaft; 7, connecting flange; 8, mounting plate; 9, first helical cylindrical gear; 10, second helical cylindrical gear; 11, connecting shaft; 12, third helical cylindrical gear; 13, heat dissipation shell; 14, heat dissipation fan; 15, ventilation filter screen; 16, support roller; 17, heat-conducting copper ring; 18, heat dissipation fin; 19, connecting screw; 20, connecting nut; 21, alignment guide rod; 22, elastic plate; 23, wedge-shaped clamping plate. Specific implementation manner

[0031] Please refer to Figure 1 - Figure 8 , the present utility model provides a gearbox of a helical gear, including a box body 1, the back surface of the box body 1 has an opening and a box cover 2 is detachably installed at the opening position, a mounting seat 3 is fixedly installed on the outer surface of the box body 1, a plurality of mounting bolts 4 are penetrated through the mounting seat 3, a first rotating shaft 5 is rotatably installed on the box body 1, a second rotating shaft 6 is rotatably installed on the box cover 2, the first rotating shaft 5 and the second rotating shaft 6 are arranged oppositely and connection flanges 7 are fixedly installed at the ends of the first rotating shaft 5 and the second rotating shaft 6 away from each other, a mounting plate 8 is fixedly installed at the end of the first rotating shaft 5 located inside the box body 1, a first helical cylindrical gear 9 is fixedly installed on the side surface of the mounting plate 8, a second helical cylindrical gear 10 is fixedly installed at the end of the second rotating shaft 6 located inside the box body 1, a plurality of connecting shafts 11 are rotatably installed on the side surface of the box cover 2, a third helical cylindrical gear 12 is fixedly installed on the outer surface of the connecting shafts 11, the third helical cylindrical gear 12 is located between the first helical cylindrical gear 9 and the second helical cylindrical gear 10 and meshes with the first helical cylindrical gear 9 and the second helical cylindrical gear 10, two heat dissipation shells 13 are penetrated and installed on the box body 1, a heat dissipation fan 14 is fixedly installed inside the heat dissipation shells 13, the surface of the heat dissipation shells 13 has ventilation openings and ventilation filter screens 15 are detachably installed at the ventilation opening positions, and the heat dissipation fans 14 inside the two heat dissipation shells 13 are an intake fan and an exhaust fan respectively.

[0032] By setting the first helical cylindrical gear 9, the second helical cylindrical gear 10 and the third helical cylindrical gear 12 to replace the spur gear transmission structure in the traditional gear box, the meshing process between the helical cylindrical gear teeth is a transitional process, and the force on the gear teeth is gradually from small to large, and then from large to small; the helical gear is suitable for high speed and heavy load conditions, the helical cylindrical gear has a long meshing time and a large contact area, thereby reducing the stress and making the transmission stable, and the long meshing time increases the overlap, thereby increasing the bearing capacity of the gear, thereby extending the service life of the gear, and the setting of the helical cylindrical gear reduces the minimum number of teeth, so the structure is compact and the weight is reduced, and the heat dissipation shell 13 is set, and the heat dissipation fan 14 in the heat dissipation shell 13 is used to accelerate the gas circulation in the box body 1, thereby accelerating the heat dissipation, and the ventilation filter 15 can be used to filter the inlet and outlet gases to prevent dust from entering the box body 1, and the heat conduction copper ring 17 and the heat dissipation fins 18 can further enhance the heat dissipation, and the ventilation filter 15 can be conveniently disassembled and assembled for easy cleaning.

[0033] A plurality of supporting rollers 16 are fixedly installed on the inner wall of the box body 1, and the wheels of the supporting rollers 16 are arranged in close contact with the outer surface of the first helical cylindrical gear 9. The wheels of the supporting rollers 16 are in close contact with the surface of the first helical cylindrical gear 9. The supporting rollers 16 can support the rotation of the first helical cylindrical gear 9 to avoid shaking when the first helical cylindrical gear 9 rotates.

[0034] A heat-conducting copper ring 17 is fixedly installed on the inner wall of the box body 1. The heat-conducting copper ring 17 is sleeved on the outer surface of the first helical cylindrical gear 9. A plurality of heat-dissipating fins 18 are fixedly installed on the outer surface of the heat-conducting copper ring 17. The heat-dissipating fins 18 are penetrated on the box body 1 and extend out of the box body 1. The heat-conducting copper ring 17 can conduct the heat generated when the first helical cylindrical gear 9 rotates, and transmit it through multiple heat-dissipating fins 18, thereby accelerating the heat conduction and dissipation and improving the heat dissipation efficiency.

[0035] A plurality of connecting screws 19 are fixedly installed on the back of the box body 1, and a through hole is opened on the box cover 2 at a position opposite to the connecting screw 19. The connecting screw 19 passes through the through hole and a connecting nut 20 is threadedly installed on the outer surface of the connecting screw 19. The connecting nut 20 is closely arranged on the side of the box cover 2. The connecting screw 19 passes through the through hole and is used in conjunction with the connecting nut 20 to realize a convenient locking operation of the box body 1 and the box cover 2. The locking structure is simple, and the threaded connection has good stability and is not easy to loosen.

[0036] An elastic plate 22 is fixedly installed on the side of the ventilation filter 15, and a wedge-shaped clamping plate 23 is fixedly installed on the side of the elastic plate 22. A wedge-shaped clamping groove for the wedge-shaped clamping plate 23 to be inserted into the side of the heat dissipation shell 13 is opened. The elastic plate 22 is used in conjunction with the wedge-shaped clamping plate 23 to facilitate the assembly operation of the ventilation filter 15 and the heat dissipation shell 13.

[0037] A number of alignment guide rods 21 are fixed on the surface of the heat dissipation shell 13. Alignment guide holes for cooperating with the alignment guide rods 21 are provided at the positions corresponding to the alignment guide rods 21 on the ventilation filter screen 15. The alignment guide rods 21 cooperate with the alignment guide holes, which is convenient for the alignment assembly of the ventilation filter screen 15, so that the wedge-shaped clamping plate 23 on the side elastic plate 22 of the ventilation filter screen 15 can be more accurately clamped into the wedge-shaped card slot.

[0038] During use, the first flange on the first rotating shaft 5 and the connecting flange 7 on the second rotating shaft 6 are used to connect with the input shaft and the output shaft. After connection, the first helical cylindrical gear 9, the second helical cylindrical gear 10 and the third helical cylindrical gear 12 are used to realize the power transmission between the first rotating shaft 5 and the second rotating shaft 6. And during the transmission process, ventilation and heat dissipation are carried out through the operation of the heat dissipation fan 14. When the gas passes in and out through the heat dissipation shell 13, it is filtered under the action of the ventilation filter screen 15 to prevent dust and impurities from entering the box body 1. At the same time, the heat conduction copper ring 17 cooperates with the heat dissipation fins 18 to accelerate the heat conduction. When it is necessary to disassemble the box body 1 and the box cover 2 later, just unscrew the connecting nut 20 to disassemble the box body 1 and the box cover 2. Pull the elastic plate 22 to make the elastic plate 22 deformed. When the elastic plate 22 is deformed, it drives the wedge-shaped clamping plate 23 to disengage from the wedge-shaped card slot, so that the ventilation filter screen 15 is unlocked and removable.

Claims

1. A helical gear box, characterized in that: The invention comprises a box body (1), the back of the box body (1) has an opening and a box cover (2) is detachably mounted at the position of the opening, a mounting seat (3) is fixedly mounted on the outer surface of the box body (1), a plurality of mounting bolts (4) are passed through the mounting seat (3), a first rotating shaft (5) is rotatably mounted on the box body (1), and a second rotating shaft (6) is rotatably mounted on the box cover (2), the first rotating shaft (5) and the second rotating shaft (6) are arranged opposite to each other and one end of the first rotating shaft (5) and the second rotating shaft (6) are away from each other. A connecting flange (7) is fixedly mounted on each of the first rotating shaft (5), one end of the first rotating shaft (5) located inside the box body (1) is fixedly mounted with a mounting plate (8), a first helical cylindrical gear (9) is fixedly mounted on the side of the mounting plate (8), a second helical cylindrical gear (10) is fixedly mounted on the end of the second rotating shaft (6) located inside the box body (1), a plurality of connecting shafts (11) are rotatably mounted on the side of the box cover (2), a third helical cylindrical gear (12) is fixedly mounted on the outer surface of the connecting shaft (11), The third helical gear (12) is located between the first helical gear (9) and the second helical gear (10) and meshes with the first helical gear (9) and the second helical gear (10). Two heat dissipation shells (13) are installed through the housing (1). A heat dissipation fan (14) is fixedly installed in the heat dissipation shell (13). The surface of the heat dissipation shell (13) has a vent and a ventilation filter (15) is detachably installed at the vent. The heat dissipation fans (14) in the two heat dissipation shells (13) are (14) are respectively an inlet fan and an exhaust fan; an elastic plate (22) is fixedly mounted on the side of the ventilation filter (15); a wedge-shaped clamping plate (23) is fixedly mounted on the side of the elastic plate (22); a wedge-shaped clamping groove for the wedge-shaped clamping plate (23) to be clamped in is provided on the side of the heat dissipation shell (13); a plurality of alignment guide rods (21) are fixedly mounted on the surface of the heat dissipation shell (13); and alignment guide holes for use with the alignment guide rods (21) are provided at positions on the ventilation filter (15) corresponding to the alignment guide rods (21).

2. A helical gearbox according to claim 1, characterized in that: A plurality of supporting rollers (16) are fixedly mounted on the inner wall of the box body (1), and the wheels of the supporting rollers (16) are arranged in close contact with the outer surface of the first helical cylindrical gear (9).

3. A helical gear box according to claim 1, characterized in that: A heat-conducting copper ring (17) is fixedly mounted on the inner wall of the box body (1), the heat-conducting copper ring (17) is sleeved on the outer surface of the first helical cylindrical gear (9), and a plurality of heat-dissipating fins (18) are fixedly mounted on the outer surface of the heat-conducting copper ring (17), the heat-dissipating fins (18) are penetrated through the box body (1) and extend out of the box body (1).

4. A helical gear box according to claim 1, characterized in that: A plurality of connecting screws (19) are fixedly mounted on the back of the box body (1); a through hole is provided on the box cover (2) at a position directly opposite to the connecting screws (19); the connecting screws (19) pass through the through hole and a connecting nut (20) is threadedly mounted on the outer surface of the connecting screw (19); the connecting nut (20) is closely arranged on the side of the box cover (2).

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