Low-abrasion speed increasing mechanism and speed increasing box
By adopting a double gear structure with opposite rotation directions in the speed increase box, the serious wear of helical gears is solved, and low wear, long life and stable power transmission is achieved.
Patent Information
- Application Number
- CN202422626136.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-29
- Publication Date
- 2025-08-08
- Estimated Expiration
- 2034-10-29
AI Technical Summary
The helical gears in the existing speed-growing box are subjected to axial force when meshing and transmission, resulting in serious wear and affecting the equipment life and normal operation.
A double-connected gear structure is adopted, wherein the first helical gear and the second helical gear rotate in opposite directions, and the axial force is opposite when meshing and transmission, so as to keep the double-connected gear in the center position and reduce wear.
Effectively reduce wear on the mounting surface of the dual gear, extend the equipment life, improve transmission efficiency and stability, and reduce noise and vibration.
Smart Images
Figure CN223203590U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of speed increasing boxes, in particular to a low-wear speed increasing mechanism and a speed increasing box. Background Art
[0002] Speed increasers are a common speed-increasing device widely used in household food processors, soymilk makers, juicers, and blenders. In existing speed-increasing gearboxes, helical gears are often used for transmission and speed-increasing transmission to achieve smooth power transmission. However, when the helical gears are engaged, they are often subjected to axial force, causing severe wear and frictional heat to the mounting locations and ends of the helical gears. If the temperature inside the speed increaser is too high, lubricating oil will overflow, affecting the normal operation of the speed increaser and shortening its lifespan. Utility Model Content
[0003] In order to overcome at least one of the defects described in the above-mentioned prior art, one of the purposes of the present invention is to provide a low-wear speed-increasing mechanism, in which double gears are used for power transmission and speed-increasing, and the first helical gear and the second helical gear in the double gears have opposite rotation directions, and during meshing transmission, the axial force exerted on the first helical gear is toward the second helical gear, and the axial force exerted on the second helical gear is toward the first helical gear, so that the double gears can maintain a centered position during transmission, eliminating or reducing the wear on the mounting surfaces at both ends of the double gear pair.
[0004] In order to overcome at least one defect of the above-mentioned prior art, the second purpose of the present utility model is to provide a speed increasing gearbox, which has the aforementioned low-wear speed increasing mechanism, so that the power transmission of the speed increasing gearbox is smooth and the service life is long.
[0005] The technical solution adopted by the present invention to solve the problem is:
[0006] A low-wear speed-increasing mechanism comprises an input shaft, an output shaft, a duplex gear, a power input gear fixedly mounted on the input shaft, and a power output gear fixedly mounted on the output shaft;
[0007] The double gear includes a first helical gear and a second helical gear, and the first helical gear and the second helical gear are coaxially fixedly connected; the first helical gear and the second helical gear are respectively engaged with the power input gear and the power output gear, and the transmission ratio of the power input gear to the first helical gear is less than 1, and the transmission ratio of the second helical gear to the power output gear is less than 1;
[0008] The first helical gear and the second helical gear have opposite rotation directions, and during meshing transmission, the axial force applied to the first helical gear is directed toward the second helical gear, and the axial force applied to the second helical gear is directed toward the first helical gear.
[0009] Further: the first helical gear is a right-handed gear and rotates clockwise, the second helical gear is a left-handed gear and rotates clockwise, or the first helical gear is a left-handed gear and rotates counterclockwise, the second helical gear is a right-handed gear and rotates counterclockwise.
[0010] Furthermore: a fixed column is also included, the first bevel gear and the second bevel gear are fixedly connected and sleeved on the fixed column, and the first bevel gear and the second bevel gear rotate around the fixed column.
[0011] Furthermore: the double gears are provided in at least two groups, and the double gears are evenly distributed around the output shaft.
[0012] Further: the input shaft is coaxially arranged with the output shaft; a first bearing is arranged between the input shaft and the output shaft; the input shaft is coaxially connected to the outer ring of the first bearing, and the output shaft is coaxially connected to the inner ring of the first bearing; or, the output shaft is coaxially connected to the outer ring of the first bearing, and the input shaft is coaxially connected to the inner ring of the first bearing.
[0013] Furthermore: a mounting hole is coaxially provided on the power input gear, the first bearing is coaxially sleeved in the mounting hole, and the fixed outer ring of the first bearing is fixedly connected to the inner wall of the mounting hole, and the output shaft is fixedly connected to the inner ring of the first bearing.
[0014] Furthermore: the transmission ratio between the power input gear and the first helical gear is equal to the transmission ratio between the second helical gear and the power output gear.
[0015] Furthermore, the module and the number of teeth of the power input gear are equal to those of the second helical gear, and the module and the number of teeth of the second helical gear are equal to those of the power output gear.
[0016] Furthermore, a second bearing and a third bearing are respectively sleeved on the two separated end portions of the input shaft and the output shaft.
[0017] A speed increasing box, comprising the aforementioned low-wear speed increasing mechanism and a box body for mounting the low-wear speed increasing mechanism, wherein the input shaft and the output shaft extend out of the box body respectively;
[0018] The second bearing and the third bearing are both mounted on the box body;
[0019] The fixing column is fixedly installed on the box body.
[0020] In summary, the low-wear speed-increasing mechanism provided by the present invention has the following technical effects:
[0021] 1. The duplex gears include a first helical gear and a second helical gear. The first helical gear and the second helical gear have opposite rotation directions. When meshing, the axial force on the first helical gear is directed toward the second helical gear, and the axial force on the second helical gear is directed toward the first helical gear. As a result, when meshing, the duplex gears are subjected to two opposite axial forces. The two axial forces can offset or partially offset each other, so that the duplex gears remain in a central position or a substantially central position during transmission, reducing the wear of the mounting positions at both ends of the duplex gears and reducing the friction on the duplex gears themselves, thereby avoiding heat generation of the duplex gears, extending the service life of the duplex gears, and thereby extending the service life of the speed increasing mechanism.
[0022] 2. There are at least two sets of double gears, and the double gears are evenly distributed around the output shaft to increase the load-bearing capacity of the output shaft.
[0023] 3. By setting up a double gear, combining the power input gear and the power output gear, a two-stage speed-increasing transmission is realized, and the transmission ratio of the two-stage speed-increasing transmission is equal. At the same time, the module and number of teeth of the power input gear and the second helical gear are equal, and the module and number of teeth of the second helical gear and the power output gear are equal, respectively, to achieve coaxial setting of the input shaft and the output shaft and coaxial transmission.
[0024] 4. The first bearing further enables the coaxial arrangement and coaxial transmission of the input and output shafts. This coaxial arrangement and coaxial transmission of the input and output shafts makes power transmission more direct, reduces energy loss during transmission, and improves transmission efficiency. It also makes power transmission smoother and reduces vibration and noise during transmission.
[0025] In summary, the speed increasing gearbox provided by the present invention has the following technical effects:
[0026] This speed increaser adopts the aforementioned low-wear speed increaser mechanism, which has low wear, low failure rate, long service life and stable power output. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 The present invention provides a schematic structural diagram of an embodiment of a speed increasing box.
[0028] Figure 2 for Figure 1 Exploded view of the medium speed gearbox.
[0029] Figure 3A structural schematic diagram of an embodiment of a low-wear speed-increasing mechanism of the utility model.
[0030] Figure 4 for Figure 3 main view.
[0031] Figure 5 for Figure 3 Exploded diagram.
[0032] The meanings of the reference numerals are as follows:
[0033] 100, speed increasing mechanism; 200, housing; 201, positioning surface; 300, speed increasing box;
[0034] 10. First bearing; 1. Input shaft; 11. Power input gear; 111. Mounting hole; 12. Second bearing; 2. Output shaft; 21. Power output gear; 22. Third bearing; 3. Duplex gear; 31. First helical gear; 32. Second helical gear; 33. Fixed column; 3a. Duplex gear 2. DETAILED DESCRIPTION
[0035] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.
[0036] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.
[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.
[0038] See Figure 3 The utility model discloses a low-wear speed-increasing mechanism 100 .
[0039] The low-wear speed-increasing mechanism 100 includes an input shaft 1 , an output shaft 2 , a duplex gear 3 , a power input gear 11 fixedly mounted on the input shaft 1 , and a power output gear 21 fixedly mounted on the output shaft 2 .
[0040] The double gear 3 includes a first helical gear 31 and a second helical gear 32, which are coaxially fixedly connected. The first helical gear 31 and the second helical gear 32 are respectively engaged with the power input gear 11 and the power output gear 21. The transmission ratio between the power input gear 11 and the first helical gear 31 is less than 1, and the transmission ratio between the second helical gear 32 and the power output gear 21 is less than 1.
[0041] The first helical gear 31 and the second helical gear 32 have opposite rotation directions. When meshing and transmitting, the axial force applied to the first helical gear 31 is directed toward the second helical gear 32 , and the axial force applied to the second helical gear 32 is directed toward the first helical gear 31 .
[0042] In the above scheme, the dual gear 3 meshes with the power input gear 11 and the power output gear 21, respectively, to achieve a two-stage transmission from the power input gear 11 to the power output gear 21. The transmission ratio between the power input gear 11 and the first helical gear 31 is less than 1, and the transmission ratio between the second helical gear 32 and the power output gear 21 is less than 1. That is, in both stages of transmission, the transmission ratio is less than 1, achieving the purpose of increasing the speed from the power input gear 11 to the power output gear 21.
[0043] In the above scheme, the first helical gear 31 and the second helical gear 32 rotate in opposite directions, and when meshing and transmitting, the axial force applied to the first helical gear 31 is directed toward the second helical gear 32, while the axial force applied to the second helical gear 32 is directed toward the first helical gear 31. When the first and second helical gears in the duplex gear 3 are meshing and transmitting with the power input gear 11 and the power output gear 21, respectively, they are subjected to opposite axial forces, which offset each other, allowing the duplex gear 3 to remain in a middle or relatively middle position along its axis during operation. This can reduce or eliminate wear on the mounting positions of the duplex gear 3 at both ends, ensure stable duplex gear transmission, and extend the service life of the duplex gear and the speed increaser housing on which the duplex gear is mounted.
[0044] like Figure 3As shown, the first helical gear 31 and the second helical gear 32 are coaxially fixedly connected. They are then coaxially sleeved on a fixing post 33. When the first helical gear rotates, the fixing post 33 remains fixed, so that the second helical gear sleeved on the fixing post 33 has the same angular velocity as the first helical gear, that is, the first and second helical gears have the same rotational speed. The first and second helical gears are coaxially sleeved on the fixing post 33 to complete the installation of the first and second helical gears. After the first helical gear and the second helical gear are coaxially sleeved on the fixed column 33, in the transmission of the first helical gear and the second helical gear, the first helical gear and the second helical gear in the form of helical gears will be subjected to axial force during the transmission. In order to prevent the first helical gear and the second helical gear from being pressed toward one end of the double gear due to the axial force driving action, thereby causing wear on the positioning surface 201 at one end of the double gear, in the above scheme, the first helical gear 31 is subjected to an axial force toward the second helical gear 32 when meshing with the power input gear 11, and the second helical gear 32 is subjected to an axial force toward the first helical gear 31 when meshing with the power output gear 21. During the double gear transmission, the first helical gear and the second helical gear are subjected to opposite axial forces, so that the double gear can maintain a centered or relatively centered position on the positioning column 33, thereby preventing the double gear from causing wear on the positioning surface 201 at one or both ends of the fixed column 33.
[0045] like Figure 2 As shown, the positioning surface 201 is used to fix the fixing column 33 and to install the duplex gears. After the duplex gears are installed, the positioning surfaces 201 at both ends of the fixing column are in contact with the outer end surface of the first helical gear or the second helical gear. After the duplex gears are subjected to opposite axial forces, the outer end surfaces of the first helical gear and the second helical gear no longer contact the positioning surfaces or the friction between the outer end surfaces and the positioning surfaces is reduced, thereby extending the service life of the duplex gears and the installation position of the duplex gears, improving the overall accuracy and installation accuracy of the duplex gears, and ensuring smooth and reliable power transmission.
[0046] Similarly, the first helical gear 31 and the second helical gear 32 are meshed with the power input gear 11 and the power output gear 21 respectively, so the power input gear 11 and the power output gear 21 are also helical gears, and the power input gear 11 and the power output gear 21, which are helical gears, have opposite rotation directions. When the first helical gear and the second helical gear are subjected to opposite axial forces, the power input gear 11 and the power output gear 21 are also subjected to axial forces respectively, and the axial force exerted on the power input gear 11 is toward the power output gear, while the axial force exerted on the power output gear is toward the power input gear. In this way, the input shaft and the power input gear 11 are also kept in the middle position and the output shaft and the power output gear 21 are also kept in the middle position, which can effectively reduce the wear of the input shaft, the power input gear 11, the output shaft and the power output gear 21 on the installation position.
[0047] In the present technical solution, in order to achieve that the first helical gear 31 and the second helical gear 32 have opposite rotation directions, and when meshing transmission, the axial force received by the first helical gear 31 is toward the second helical gear 32, and the axial force received by the second helical gear 32 is toward the first helical gear 31, the adopted solutions are: the first helical gear 31 is a right-handed gear and the rotation direction is clockwise, the second helical gear 32 is a left-handed gear and the rotation direction is also clockwise, or the first helical gear 31 is a left-handed gear and the rotation direction is counterclockwise, the second helical gear 32 is a right-handed gear and the rotation direction is also counterclockwise.
[0048] In the above scheme, the first bevel gear 31 is a right-handed gear and rotates in a clockwise direction, and the second bevel gear 32 is a left-handed gear and rotates in a clockwise direction. At this time, the power input gear is a left-handed gear and rotates in a counterclockwise direction, and the power output gear is a right-handed gear and rotates in a counterclockwise direction.
[0049] In the above scheme, the first bevel gear 31 is a left-handed gear and rotates counterclockwise, and the second bevel gear 32 is a right-handed gear and rotates counterclockwise. At this time, the power input gear is a right-handed gear and rotates clockwise, and the power output gear is a left-handed gear and rotates clockwise.
[0050] According to the description of the above two schemes, it can be seen that the power input gear and the power output gear have the same rotation direction, that is, the input shaft and the output shaft have the same rotation direction.
[0051] In this technical solution, the speed increasing mechanism 100 further includes a fixed post 33, around which the first helical gear 31 and the second helical gear 32 are fixedly connected and sleeved. The first helical gear 31 and the second helical gear 32 rotate. The first helical gear 31 and the second helical gear 32 are integrally formed and coaxially sleeved on the fixed post 33. During meshing transmission, the fixed post 33 remains stationary, thereby securing and limiting the position of the duplex gear 3, ensuring the rotational position of the duplex gears, and ensuring smooth meshing and stable transmission of the duplex gears with the power input gear 11 and the power output gear 21.
[0052] Generally, when this speed-increasing mechanism is used in small household appliances, such as juicers, blenders, and soymilk makers, to achieve strong electrical isolation and reduce costs, the speed-increasing box and speed-increasing mechanism are made of plastic, the fixed column 33 is molded from plastic, and the first and second helical gears in the duplex gears are also made of plastic. In a duplex gear transmission, if there is significant direct friction between the duplex gears and the fixed column 33 and the positioning surfaces 201 at both ends of the fixed column 33, this may cause wear on the duplex gears, the fixed column, and the positioning surfaces. This wear may even generate heat, causing the duplex gears, the fixed column, and the positioning surfaces to soften and deform, affecting the normal operation of the speed-increasing mechanism and shortening its service life.
[0053] In this technical solution, at least two groups of double gears 3 are provided, and each double gear 3 is evenly distributed around the output shaft 2. Figure 1 As shown, a second dual gear 3a is also provided opposite the dual gear 3. Of course, more dual gear sets can be provided, evenly distributed around the power input gear and / or power output gear. The evenly wound arrangement of multiple dual gear sets balances the transmission forces applied to the power input gear 11 and the power output gear 21, ensuring smooth transmission between the power input gear 11 and the power output gear 21 and smooth power output from the output shaft. Furthermore, the evenly wound arrangement of multiple dual gear sets increases the load-bearing capacity of the output shaft, improving its output torque.
[0054] In this technical solution, the input shaft 1 and the output shaft 2 are coaxially arranged.
[0055] A first bearing 10 is provided between the input shaft 1 and the output shaft 2. The input shaft 1 is coaxially connected to the outer ring of the first bearing 10, and the output shaft 2 is coaxially connected to the inner ring of the first bearing 10; alternatively, the output shaft 2 is coaxially connected to the outer ring of the first bearing 10, and the input shaft 1 is coaxially connected to the inner ring of the first bearing 10.
[0056] In the above scheme, by setting the first bearing and connecting the input shaft and the output shaft to the first bearing, on the one hand, the coaxial setting and coaxial transmission of the input shaft and the output shaft are realized, and on the other hand, the installation of the input shaft and the output shaft is realized through the setting of the first bearing, which avoids the problem of cantilever transmission at the ends of the input shaft and the output shaft that are close to each other during transmission, ensures that the ends of the output shaft and the output shaft are installed close to each other, and reduces the swing problem of the input shaft and the output shaft when they rotate at high speed during operation.
[0057] In the above embodiment, either the input shaft or the output shaft can be connected to the outer ring of the first bearing. When the outer ring of the first bearing is connected to one of the input shaft and the output shaft, the inner ring of the first bearing is connected to the other of the input shaft and the output shaft. Preferably, the outer ring of the first bearing is coaxially fixedly connected to one of the input shaft and the output shaft, and the inner ring of the first bearing is coaxially fixedly connected to the other of the input shaft and the output shaft.
[0058] In the above solution, by connecting both the input shaft and the output shaft to the first bearing, the installation structure of the input shaft and the output shaft is simplified, and at the same time, the connection structure of the input shaft and the output shaft is made compact, thereby avoiding the alignment operation when the input shaft and the output shaft are coaxially installed, and reducing or even eliminating the error of the coaxial installation of the input shaft and the output shaft.
[0059] In the above solution, by connecting both the input shaft and the output shaft to the first bearing, combined with the transmission and speed increase of the double gear 3, the output shaft transmission is smooth, the output shaft vibration is reduced, and the output shaft power output is stable.
[0060] As described above, the power input gear and the power output gear rotate in the same direction, meaning the input shaft and the output shaft rotate in the same direction. When the input and output shafts rotate in the same direction, the relative speed of the output shaft to the input shaft decreases, and the relative speed between the inner ring and the outer ring of the first bearing connecting the input and output shafts decreases, effectively reducing bearing wear.
[0061] In this technical solution, a mounting hole 111 is coaxially provided on the power input gear 11, the first bearing 10 is coaxially sleeved in the mounting hole 111, and the fixed outer ring of the first bearing 10 is fixedly connected to the inner wall of the mounting hole 111, and the output shaft 2 is fixedly connected to the inner ring of the first bearing 10.
[0062] A mounting hole 111 is coaxially provided on the power input gear 11, and a first bearing is provided in the mounting hole, and the outer ring of the first bearing cooperates with the mounting hole so that the first bearing is installed in the mounting hole. Preferably, the outer ring of the first bearing is coaxially fixedly installed with the mounting hole. Providing the mounting hole to install the first bearing eliminates the need for a fixed bracket and another bearing for mounting the input shaft or output shaft, which are originally required in the speed-increasing mechanism. At the same time, it also shortens the overall height of the speed-increasing mechanism and reduces the height of the speed-increasing box, reducing the height of the speed-increasing box by at least about 20 mm, saving costs, optimizing assembly difficulty, and optimizing the precision of the coaxial assembly of the input shaft and output shaft.
[0063] In this technical solution, the transmission ratio between the power input gear 11 and the first helical gear is equal to the transmission ratio between the second helical gear and the power output gear 21, so that the input shaft and the output shaft are coaxially arranged and coaxially driven.
[0064] In the above scheme, the input shaft and the output shaft are coaxially arranged and transmitted coaxially, which makes the power transmission more direct, reduces the energy loss during transmission, and improves the transmission efficiency. At the same time, it also makes the power transmission smoother, can reduce the vibration and noise during the transmission process, and reduces the unbalanced force caused by different axes.
[0065] In the above scheme, the input shaft and the output shaft are coaxially arranged and the transmission is coaxial. The coaxial arrangement of the input shaft and the output shaft makes the speed increasing mechanism structure more compact, saves the space of the speed increasing mechanism, reduces the volume of the speed increasing box using the speed increasing mechanism, and realizes the miniaturization and lightweight of the speed increasing box.
[0066] In the above scheme, the input shaft and the output shaft are coaxially arranged and coaxially transmitted, which simplifies the structural design of the speed-increasing mechanism and makes the installation and maintenance of the speed-increasing mechanism simpler and more convenient. The input shaft and the output shaft are on the same axis, which makes it easy to align and adjust the input shaft and the output shaft.
[0067] In the above scheme, in order to achieve equal transmission ratios between the power input gear 11 and the first helical gear and between the second helical gear and the power output gear 21, the input shaft and the output shaft are coaxially arranged and coaxially driven, the module and number of teeth of the power input gear 11 and the second helical gear are respectively equal, and the module and number of teeth of the second helical gear and the power output gear 21 are respectively equal.
[0068] In this technical solution, a second bearing 12 and a third bearing 22 are respectively mounted on the ends of the input shaft 1 and the output shaft 2, respectively, away from the first bearing 10. The second bearing 12 and the third bearing 22 respectively enable the installation of the input and output shafts at their respective ends, thereby avoiding the problem of cantilever transmission of the input and output shafts and improving the rotational stability of the output shafts, particularly ensuring stable rotational motion output of the output shafts.
[0069] This solution also proposes a speed increasing gearbox 300. This speed increasing gearbox 300 includes the aforementioned low-wear speed increasing mechanism 100 and a housing 200 for mounting the low-wear speed increasing mechanism 100. Both the input shaft 1 and the output shaft 2 extend from the housing 200. This allows for easy installation and connection between the speed increasing gearbox and external components.
[0070] The second bearing 12 and the third bearing 22 are both mounted on the housing 200. The second bearing and the third bearing are fixedly mounted, and the input shaft and the output shaft are mounted, thereby avoiding the problem of cantilever transmission of the input shaft and the output shaft during transmission.
[0071] The fixing post 33 is fixedly mounted to the housing 200, enabling the installation and positioning of the duplex gears. Specifically, the fixing post 33 is integrally formed with the housing, enhancing its strength, optimizing its installation accuracy, and reducing the need for precision in mounting the duplex gears coaxially sleeved on the fixing post 33.
[0072] This speed increaser adopts the low-wear speed increaser mechanism in this solution. The speed increaser mechanism has little wear and low heat generation when engaged in transmission. The speed increaser has a low failure rate, a long service life and stable power output.
[0073] The technical means disclosed in the present invention are not limited to those disclosed in the above-mentioned embodiments, but also include technical solutions composed of any combination of the above-mentioned technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications are also considered to be within the scope of protection of the present invention.
Claims
1. A low-wear speed-increasing mechanism, characterized by: It includes an input shaft, an output shaft, a duplex gear, a power input gear fixedly mounted on the input shaft, and a power output gear fixedly mounted on the output shaft; The double gear includes a first helical gear and a second helical gear, and the first helical gear and the second helical gear are coaxially fixedly connected; the first helical gear and the second helical gear are respectively engaged with the power input gear and the power output gear, and the transmission ratio of the power input gear to the first helical gear is less than 1, and the transmission ratio of the second helical gear to the power output gear is less than 1; The first helical gear and the second helical gear have opposite rotation directions, and during meshing transmission, the axial force applied to the first helical gear is directed toward the second helical gear, and the axial force applied to the second helical gear is directed toward the first helical gear.
2. The low-wear speed-increasing mechanism according to claim 1, characterized in that: The first helical gear is a right-handed gear and rotates clockwise, the second helical gear is a left-handed gear and rotates clockwise, or the first helical gear is a left-handed gear and rotates counterclockwise, the second helical gear is a right-handed gear and rotates counterclockwise.
3. The low-wear speed-increasing mechanism according to claim 1 or 2, characterized in that: It also includes a fixed column, the first bevel gear and the second bevel gear are fixedly connected and sleeved on the fixed column, and the first bevel gear and the second bevel gear rotate around the fixed column.
4. The low-wear speed-increasing mechanism according to claim 1, characterized in that: At least two groups of the double gears are provided, and the double gears are evenly distributed around the output shaft.
5. The low-wear speed-increasing mechanism according to claim 1, characterized in that: The input shaft is coaxially arranged with the output shaft; a first bearing is arranged between the input shaft and the output shaft; the input shaft is coaxially connected to the outer ring of the first bearing, and the output shaft is coaxially connected to the inner ring of the first bearing; or, the output shaft is coaxially connected to the outer ring of the first bearing, and the input shaft is coaxially connected to the inner ring of the first bearing.
6. The low-wear speed-increasing mechanism according to claim 5, characterized in that: A mounting hole is coaxially provided on the power input gear, the first bearing is coaxially sleeved in the mounting hole, and the fixed outer ring of the first bearing is fixedly connected to the inner wall of the mounting hole, and the output shaft is fixedly connected to the inner ring of the first bearing.
7. The low-wear speed-increasing mechanism according to claim 1, characterized in that: The transmission ratio between the power input gear and the first helical gear is equal to the transmission ratio between the second helical gear and the power output gear.
8. The low-wear speed-increasing mechanism according to claim 7, characterized in that: The module and the number of teeth of the power input gear are equal to those of the second helical gear, and the module and the number of teeth of the second helical gear are equal to those of the power output gear.
9. The low-wear speed-increasing mechanism according to claim 1, characterized in that: A second bearing and a third bearing are respectively sleeved on the two separated end portions of the input shaft and the output shaft.
10. A speed increasing gearbox, characterized in that: The invention comprises the low-wear speed-increasing mechanism according to any one of claims 1 to 9 and a housing for mounting the low-wear speed-increasing mechanism, wherein the input shaft and the output shaft extend out of the housing respectively; The second bearing and the third bearing are both mounted on the box; The fixing column is fixedly installed on the box body.