Gearbox for new energy engineering machinery

Abstract

The utility model relates to the technical field of gearboxes, and discloses a gearbox for new energy engineering machinery, the gearbox is composed of a positive helical angle helical gear, a negative helical angle helical gear, an intermediate shaft, an output shaft and motors, the motors comprise a first motor and a second motor, the first motor and the second motor are symmetrically distributed on two sides of a box body, and the first motor and the second motor are arranged on the box body. The two input shafts are respectively connected with respective input shafts, each input shaft is respectively provided with a first-stage positive helical angle helical gear and a second-stage positive helical angle helical gear, and the first-stage positive helical angle helical gear and the second-stage positive helical angle helical gear are meshed with each other to form a first-stage reduction gear pair; according to the gearbox for the new energy engineering machinery, due to the unique two-stage speed reduction meshing design of the positive helical angle bevel gear and the negative helical angle bevel gear, axial force is automatically counteracted, and the stability and the reliability of a transmission system are greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to gearbox technical field, concretely is a new energy engineering machinery gearbox. BACKGROUND

[0002] In the current non-road engineering machinery electrification process, the transmission system of the gearbox or the speed reducer is usually required to be efficient, stable and compact. When the traditional speed reduction device faces high load and high precision requirements, the problem of unbalanced axial force often occurs, which not only affects the transmission efficiency of the speed reducer, but also may cause early wear of the bearing, increase of vibration and increase of noise, etc.

[0003] The current mainstream scheme on the market mainly has the following problems:

[0004] 1. The traditional speed reducer (gearbox) gear adopts the same helix angle design, which causes the axial force to be superimposed, and the bearing life is reduced by more than 40%;

[0005] 2. The axial force generated by the gear transmission will be transmitted to the bearing and the casing, which will cause the system vibration and noise to increase;

[0006] 3. The existing scheme needs to increase additional mechanism to offset the axial force, which greatly increases the complexity of the whole system;

[0007] Some existing methods for offsetting axial force either have complex structure and high cost, or have poor effect, which cannot meet the growing industrial demand. Therefore, it is of great practical significance to develop a speed reducer (gearbox) that can effectively offset the axial force and has the advantages of high efficiency, stability and compact structure. CONTENT OF THE UTILITY MODEL

[0008] The utility model aims at providing a new energy engineering machinery gearbox to solve the problems in the above background technology.

[0009] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0010] The utility model relates to a new energy engineering machinery gearbox which is composed of positive helix angle helical gears, negative helix angle helical gears, intermediate shafts, output shafts and motors, the motors include first motors and second motors which are symmetrically distributed on both sides of the gearbox and are connected with respective input shafts, first-stage positive helix angle helical gears and second-stage positive helix angle helical gears are respectively installed on each input shaft and mesh with each other to form a first-stage speed reduction gear pair, a first-stage negative helix angle helical gear which meshes with the first-stage positive helix angle helical gear is installed on the intermediate shaft, and a second-stage negative helix angle helical gear which meshes with the first-stage negative helix angle helical gear on the intermediate shaft is installed on the output shaft to form a second-stage speed reduction gear pair.

[0011] As a preferred technical scheme of the utility model, the helix angles of the first-stage positive helix angle helical gears and the second-stage positive helix angle helical gears are equal in size and have the same direction, and axial forces in the same direction are generated in the process of power transmission.

[0012] As a preferred technical scheme of the utility model, the first-stage negative helix angle helical gears and the first-stage positive helix angle helical gears are equal in modulus and equal in size but opposite in direction.

[0013] As a preferred technical scheme of the utility model, the first motors and the second motors are consistent in size.

[0014] As a preferred technical scheme of the utility model, the output shaft is used for transmitting power to external equipment.

[0015] Compared with the prior art, the utility model has the following beneficial effects: the new energy engineering machinery gearbox effectively offsets axial forces, realizes automatic offset of axial forces through the two-stage speed reduction meshing design of the unique positive and negative helix angle helical gears, greatly improves the stability and reliability of the transmission system, improves transmission efficiency, reduces energy loss caused by axial forces, thereby improving transmission efficiency and reducing energy consumption, prolongs the service life, reduces the wear of bearings and other key components caused by axial forces, prolongs the overall service life of the gearbox and reduces maintenance costs, reduces vibration and noise during operation of the gearbox and improves the working environment. BRIEF DESCRIPTION OF DRAWINGS

[0016] Other features, objects and advantages of the application will become more apparent from the following detailed description of non-restrictive embodiments made with reference to the accompanying drawings:

[0017] Fig. 1 It is a transmission diagram of the speed reducer of the new energy engineering machinery gearbox.

[0018] Fig. 2 The utility model discloses a gear force analysis diagram of new energy engineering machinery gearbox;

[0019] In the drawing: 1, first positive helix angle helical gear; 2, second positive helix angle helical gear; 201, input shaft; 202, intermediate shaft; 203, output shaft; 3, first negative helix angle helical gear; 4, second negative helix angle helical gear; 5, first motor; 6, second motor. DETAILED DESCRIPTION

[0020] The application will be further described below in detail in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related utility model, and not limited to the utility model. In addition, it should be noted that, in order to facilitate the description, only the parts related to the utility model are shown in the drawings, and the drawings in the utility model embodiments: different kinds of section lines in the drawing are not marked according to the national standard, and the material of the element is not required, which is to distinguish the section view of the element in the drawing.

[0021] Please refer to Figs. 1-2 A new energy engineering machinery gearbox, which is composed of positive helix angle helical gear, negative helix angle helical gear, intermediate shaft 202, output shaft 203 and motor, the motor includes first motor 5 and second motor 6, the first motor 5 and the second motor 6 are symmetrically distributed on both sides of the box body, and are connected with respective input shafts 201, the first positive helix angle helical gear 1 and the second positive helix angle helical gear 2 are respectively installed on each input shaft 201, the first positive helix angle helical gear 1 and the second positive helix angle helical gear 2 are meshed with each other to form a first-stage reduction gear pair; the first negative helix angle helical gear 3 meshed with the first positive helix angle helical gear 1 is installed on the intermediate shaft 202; the second negative helix angle helical gear 4 is installed on the output shaft 203 and is meshed with the first negative helix angle helical gear 3 on the intermediate shaft 202 to form a second-stage reduction gear pair.

[0022] Among them, the helix angle of the first positive helix angle helical gear 1 and the second positive helix angle helical gear 2 is equal, and the direction is the same, in the process of power transmission, the same direction axial force is generated.

[0023] Among them, the first negative helix angle helical gear 3 and the first positive helix angle helical gear 1 are equal in modulus, and the helix angle is equal but the direction is opposite.

[0024] Among them, the first motor 5 and the second motor 6 are consistent in size.

[0025] Among them, the output shaft 203 is used for transmitting power, and the power transmitted by the first motor 5 and the second motor 6 is transmitted to the external equipment.

[0026] The working principle and use process of the utility model: the gearbox overall structure: by positive helix angle helical gear, negative helix angle helical gear, intermediate shaft 202, output shaft 203 and motor are composed, first motor 5 and second motor 6 are symmetrically distributed on the both sides of the box, are connected with respective input shaft 201 respectively;

[0027] First stage reduction: each input shaft 201 is respectively equipped with first stage positive helix angle helical gear 1 and second stage positive helix angle helical gear 2, first stage positive helix angle helical gear 1 and second stage positive helix angle helical gear 2 are mutually engaged, and first stage reduction gear pair is formed, the helix angle of the two positive helix angle helical gears is equal, and the direction is same, in the process of power transmission, the axial force in the same direction is produced;

[0028] Second stage reduction: the intermediate shaft 202 is equipped with the first stage negative helix angle helical gear 3 that is engaged with the first stage positive helix angle helical gear 1;A second stage negative helix angle helical gear 4 is installed on the output shaft 203, and is engaged with the first stage negative helix angle helical gear 3 on the intermediate shaft 202, to form a second stage reduction gear pair, the axial force direction of the negative helix angle helical gear in the second stage reduction gear pair is opposite to the axial force direction of the first stage positive helix angle helical gear when transmitting power;

[0029] Axial force cancellation principle: because the axial force produced by the first stage positive helix angle helical gear and the axial force produced by the second stage negative helix angle helical gear are equal in size and opposite in direction, the mutual cancellation of axial force is realized, the whole transmission system is more stable in the running process, and the wear and failure of parts caused by axial force are reduced.

[0030] The contents not described in detail in the description belong to the prior art known to those skilled in the art.

[0031] The above description is only the preferred embodiment of the application and the explanation of the applied technical principles. Those skilled in the art should understand that the utility model range involved in the application is not limited to the technical solutions formed by the specific combination of the above technical features, and also covers other technical solutions formed by the above technical features or equivalent features in any combination without departing from the utility model concept. For example, the above features are replaced with the technical features disclosed in the application (but not limited to) having similar functions to form technical solutions.

Claims

1. A gearbox for new energy engineering machinery, the gearbox is composed of a positive helix angle helical gear, a negative helix angle helical gear, an intermediate shaft (202), an output shaft (203) and a motor, characterized in that: The motor comprises a first motor (5) and a second motor (6), which are symmetrically distributed on two sides of the box body and are connected with respective input shafts (201), a first-stage positive helix angle helical gear (1) and a second-stage positive helix angle helical gear (2) are respectively installed on each input shaft (201), the first-stage positive helix angle helical gear (1) and the second-stage positive helix angle helical gear (2) are meshed with each other to form a first-stage speed reduction gear pair; a first-stage negative helix angle helical gear (3) meshed with the first-stage positive helix angle helical gear (1) is installed on a middle shaft (202); a second-stage negative helix angle helical gear (4) is installed on an output shaft (203) and is meshed with the first-stage negative helix angle helical gear (3) on the middle shaft (202) to form a second-stage speed reduction gear pair.

2. A gearbox for new energy engineering machinery according to claim 1, characterized in that: The helix angles of the first-stage positive helix angle helical gear (1) and the second-stage positive helix angle helical gear (2) are equal in size and same in direction, and axial forces in the same direction are generated in the process of power transmission.

3. A gearbox for new energy engineering machinery according to claim 1, characterized in that: The first-stage negative helix angle helical gear (3) and the first-stage positive helix angle helical gear (1) are equal in modulus and equal in size but opposite in direction.

4. A gearbox for new energy engineering machinery according to claim 1, characterized in that: The first motor (5) and the second motor (6) are consistent in size.

5. A gearbox for new energy engineering machinery according to claim 1, characterized in that: The output shaft (203) is used for transmitting power and transmitting power from the first motor (5) and the second motor (6) to external equipment.

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