Speed reducer with gear ratio

Abstract

The embodiment of the invention provides a speed reducer with a gear ratio, and relates to the technical field of mechanical transmission. The speed reducer with the gear ratio comprises a front shell, the right side of the front shell is fixedly connected with a rear shell through a bolt, an input gear shaft used for providing power is installed in the middle of the front shell in a penetrating mode, the input gear shaft is connected with a motor output shaft, and an intermediate shaft body is transversely installed at the upper end of an inner cavity of the front shell; a sun wheel shaft body is transversely installed in the middle of an inner cavity of the front shell, the sun wheel shaft body and the input gear shaft are coaxially installed, and a planetary reduction gear set is installed on the right side of the surface of the sun wheel shaft body. By optimally designing the combination of the first-stage speed reduction mechanism, the second-stage speed reduction mechanism and the planetary speed reduction gear set, the function of automatically adjusting the speed reduction ratio under different working conditions is achieved, the reversing speed is increased, the hydraulic power loss is reduced, and the overall efficiency and reliability of the system are remarkably improved.

Description

Technical Field

[0001] The present application relates to the technical field of mechanical transmission, and in particular to a variable speed ratio reducer. Background Art

[0002] With the continuous improvement of industrial automation level, various mechanical equipment have higher and higher performance requirements for transmission systems. Especially in the field of hydrogen compressors, due to the special working environment, there are extremely strict requirements for the efficiency, stability and reliability of the transmission system.

[0003] Although traditional reducers can meet basic deceleration requirements, when faced with the rotary reversing valve drive in the hydrogen compressor, they are often unable to effectively reduce the energy consumption during the reversing process, resulting in low overall system efficiency and increased operating costs.

[0004] Therefore, for hydrogen compressor applications, there is an urgent need for a new type of reducer that can effectively reduce the energy consumption of the reversing valve, increase the reversing speed and reduce the hydraulic power loss. Summary of the invention

[0005] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a variable speed ratio reducer, which realizes the function of automatically adjusting the reduction ratio under different working conditions by optimizing the design of the combination of the primary and secondary reduction mechanisms and the planetary reduction gear set, which not only improves the switching speed and reduces the hydraulic power loss, but also significantly improves the overall efficiency and reliability of the system.

[0006] This application is implemented as follows:

[0007] The present application provides a variable speed ratio reducer, including a front housing, the right side of the front housing is fastened with a rear housing by bolts, an input gear shaft for providing power is installed through the middle of the front housing, and the input gear shaft is connected to the output shaft of the motor, an intermediate shaft body is transversely installed at the upper end of the inner cavity of the front housing, and a sun gear shaft body is transversely installed in the middle of the inner cavity of the front housing, wherein the sun gear shaft body is coaxially installed with the input gear shaft, and a planetary reduction gear set is installed on the right side of the surface of the sun gear shaft body.

[0008] According to the variable speed ratio reducer of the embodiment of the present application, an oil seal is mounted at the opening on the right side of the inner cavity of the rear housing, and an oil seal is mounted at the opening on the left side of the inner cavity of the front housing and located on the outer side of the surface of the input gear shaft, and a deep groove ball bearing is mounted on the surface on the left side of the inner cavity of the front housing.

[0009] According to the variable speed ratio reducer of the embodiment of the present application, a primary driving gear is sleeved on the right side of the surface of the input gear shaft, and at the same time, a primary driven gear is sleeved on the left side of the surface of the intermediate shaft body, wherein the primary driving gear and the primary driven gear are meshed with each other.

[0010] According to the variable speed ratio reducer of the embodiment of the present application, deep groove ball bearing 2 and deep groove ball bearing 3 are respectively installed on the front and rear ends of the surface of the intermediate shaft body, and deep groove ball bearing 2 and deep groove ball bearing 3 are used to support the intermediate shaft body and improve its stability during rotation.

[0011] According to the variable speed ratio reducer of the embodiment of the present application, a secondary elliptical driving gear is sleeved on the right side of the intermediate shaft surface, and a secondary elliptical driven gear is sleeved on the left end of the outer surface of the sun gear shaft body, wherein the secondary elliptical driven gear and the sun gear shaft body are meshed with each other.

[0012] According to the variable speed ratio reducer of the embodiment of the present application, the surfaces of the secondary elliptical driving gear and the secondary elliptical driven gear are provided with dynamic balancing weight-reducing holes, and there are multiple dynamic balancing weight-reducing holes. A needle roller bearing 1 is mounted on the left side of the outer surface of the sun gear shaft and located in the inner cavity of the input gear shaft. The needle roller bearing 1 cooperates with the sun gear shaft body to support the sun gear shaft body and the input gear shaft.

[0013] According to the variable speed ratio reducer of the embodiment of the present application, the planetary reduction gear set includes a sun gear body mounted on a sun gear shaft body, and the outer ring of the sun gear body is meshedly connected with planetary gear bodies all around.

[0014] According to the variable speed ratio reducer of the embodiment of the present application, the inner ring of the planetary gear body is provided with a pin shaft body, and the side opposite to the pin shaft body and the planetary gear body is provided with a second needle roller bearing.

[0015] According to the variable speed ratio reducer of the embodiment of the present application, the outer surface of the planetary gear body is sleeved with an inner gear ring member, wherein the planetary gear body is meshed with the outer ring of the sun gear shaft body and the inner ring of the inner gear ring member respectively.

[0016] According to the variable speed ratio reducer of the embodiment of the present application, a planet carrier is installed on the outer side of the sun gear shaft body, and four deep groove ball bearings are installed on the outer surface of the planet carrier.

[0017] Beneficial effects of the present invention: The variable speed ratio reducer provided by the present invention has ingeniously designed primary and secondary reduction mechanisms and planetary reduction gear sets through targeted development, which not only realizes efficient transmission, but is also particularly suitable for driving the rotary reversing valve in the hydrogen compressor. The reducer utilizes the variable speed ratio principle, and when the reversing valve switches to the dead point, it can significantly increase the reversing speed, effectively reduce the hydraulic power loss, and thus greatly improve the overall efficiency of the system.

[0018] In addition, by adopting various types of bearings, such as deep groove ball bearings and needle bearings, the stability and reliability of the equipment under long-term operation are ensured, and the service life is extended. In addition, the present invention also takes lightweight design into special consideration. By setting dynamic balancing weight-reducing holes on the secondary elliptical driving gear and the secondary elliptical driven gear, the dynamic balance of the gear is ensured, the overall weight is reduced, and the transmission efficiency is further improved.

[0019] In summary, the variable speed ratio reducer proposed in the invention not only solves the problems existing in the prior art, but also provides an efficient and reliable transmission solution for the field of hydrogen compressors. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a schematic diagram of the overall structure assembly according to an embodiment of the present application;

[0022] Figure 2 is a schematic diagram of the meshing structure of a secondary elliptical driving gear and a secondary elliptical driven gear according to an embodiment of the present application;

[0023] Figure 3 It is a schematic diagram of the meshing structure of the sun gear body, the planetary gear body and the inner gear ring according to an embodiment of the present application.

[0024] In the figure: 1, front housing; 101, rear housing; 102, oil seal one; 2, input gear shaft; 201, oil seal two; 202, deep groove ball bearing one; 3, primary driving gear; 4, intermediate shaft; 401, deep groove ball bearing two; 402, deep groove ball bearing three; 5, primary driven gear; 6, secondary elliptical driving gear; 7, secondary elliptical driven gear; 701, dynamic balancing weight reduction hole; 8, sun gear shaft; 801, needle roller bearing one; 9, sun gear body; 10, planetary gear body; 11, pin shaft body; 12, needle roller bearing two; 13, inner gear ring; 14, deep groove ball bearing four; 15, planet carrier. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0026] In order to make the purpose, technical solutions and advantages of the implementation methods of this application clearer, the technical solutions in the implementation methods of this application will be clearly and completely described below in conjunction with the drawings in the implementation methods of this application. Obviously, the described implementation methods are part of the implementation methods of this application, not all of the implementation methods. Based on the implementation methods in this application, all other implementation methods obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0027] like Figure 1-Figure 3 As shown, the variable speed ratio reducer according to the embodiment of the present application includes a front housing 1, the right side of the front housing 1 is fastened with a rear housing 101 by bolts, wherein the front housing 1 and the rear housing 101 cooperate with each other to form an assembly cavity; an oil seal 102 is mounted at the opening on the right side of the inner cavity of the rear housing 101;

[0028] Specifically, an input gear shaft 2 for providing power is installed through the middle of the front housing 1, and the input gear shaft 2 is connected to the motor output shaft, so that the motor power is transmitted to the input gear shaft 2 through its output shaft, wherein a screw hole used in conjunction with the motor output shaft is provided in an annular manner on the left side of the input gear shaft 2, for connecting the motor output shaft and the input gear shaft 2 through bolts and screw holes; and an oil seal 2 201 is sleeved on the outer side of the opening on the left side of the inner cavity of the front housing 1 and located on the surface of the input gear shaft 2, wherein the oil seal 1 102 and the oil seal 2 201 are both seals, which are simply seals for lubricating oil, used to seal grease, oil is the most common liquid substance in the transmission system, and also generally refers to a mechanical element with the general meaning of a liquid substance, which isolates the parts in the transmission components that need to be lubricated from the output components to prevent the lubricating oil from leaking;

[0029] Specifically, a deep groove ball bearing 202 is sleeved on the surface of the input gear shaft 2 on the left side of the inner cavity of the front housing 1, and the deep groove ball bearing 202 is used to increase the stability of the input gear shaft 2 during transmission;

[0030] Specifically, an intermediate shaft body 4 is transversely mounted at the upper end of the inner cavity of the front housing 1, and a deep groove ball bearing 401 and a deep groove ball bearing 402 are respectively mounted on the front and rear ends of the surface of the intermediate shaft body 4, and the fixed ends of the outer surfaces of the deep groove ball bearing 401 and the deep groove ball bearing 402 are connected to the inner cavity of the front housing 1, and the deep groove ball bearing 401 and the deep groove ball bearing 402 are used to support the intermediate shaft body 4 and improve its stability during rotation;

[0031] Specifically, a primary driving gear 3 is sleeved on the right side of the surface of the input gear shaft 2, and at the same time, a primary driven gear 5 is sleeved on the left side of the surface of the intermediate shaft body 4, wherein the primary driving gear 3 and the input gear shaft 2 are rigidly connected, and the intermediate shaft body 4 and the primary driven gear 5 are also rigidly connected. The rigid connection refers to a pipe connection method in which a heat shrink tube made of a cross-linked material is flame-heated so that the hot melt adhesive on the inner surface of the heat shrink tube is bonded to the outer surface of the pipe material, and the heat shrink tube is cooled and solidified to form a constant tightening force, which belongs to a rigid connection, wherein the primary driving gear 3 and the primary driven gear 5 are meshed with each other;

[0032] Specifically, the input gear shaft 2 is connected to the motor output shaft, and the input gear shaft 2 is equipped with a primary driving gear 3, which meshes with the primary driven gear 5 of the intermediate shaft body 4, and the primary driven gear 5 is rigidly connected to the intermediate shaft to achieve the first stage of reduction;

[0033] A sun gear shaft body 8 is transversely mounted in the middle of the inner cavity of the front housing 1; wherein the sun gear shaft body 8 is coaxially mounted with the input gear shaft 2, a secondary elliptical driving gear 6 is sleeved on the right side of the surface of the intermediate shaft body 4, and a secondary elliptical driven gear 7 is sleeved on the left end of the outer surface of the sun gear shaft body 8, wherein the secondary elliptical driven gear 7 and the sun gear shaft body 8 are meshed with each other, and the intermediate shaft body 4 and the secondary elliptical driving gear 6 are rigidly connected, and the secondary elliptical driven gear 7 is rigidly mounted on the surface of the sun gear shaft body 8;

[0034] The working principle of the secondary reduction is as follows: the intermediate shaft body 4 is equipped with a secondary elliptical driving gear 6, which is a driving gear and is rigidly connected to the intermediate shaft body 4; the secondary elliptical driving gear 6 is meshed with the secondary elliptical driven gear 7, wherein the secondary elliptical driven gear 7 is a passive gear, and the elliptical gear meshing reduction ratio of the second-stage secondary elliptical driving gear 6 and the secondary elliptical driven gear 7 varies at different meshing positions;

[0035] As shown in the input gear shaft 2, the surfaces of the secondary elliptical driving gear 6 and the secondary elliptical driven gear 7 are provided with dynamic balancing weight-reducing holes 701, and there are multiple dynamic balancing weight-reducing holes 701, so as to increase the stability of the meshing transmission between the secondary elliptical driving gear 6 and the secondary elliptical driven gear 7;

[0036] Specifically, in order to increase the stability between the sun gear shaft body 8 and the input gear shaft 2, an assembly hole is opened on the right side of the input gear shaft 2, and a needle bearing 801 can be installed in the assembly hole. A needle bearing 801 is sleeved on the left side of the outer surface of the sun gear shaft body 8 and located in the inner cavity of the input gear shaft 2. The needle bearing 801 cooperates with the sun gear shaft body 8 to achieve support for the sun gear shaft body 8 and the input gear shaft 2.

[0037] A planetary reduction gear set is installed on the right side of the surface of the sun gear shaft body 8. The planetary reduction gear set includes a sun gear body 9 mounted on the sun gear shaft body 8, and the outer ring of the sun gear body 9 is meshed with planetary gear bodies 10 all around. The inner ring of the planetary gear body 10 is mounted with a pin shaft body 11, and the opposite side of the pin shaft body 11 and the planetary gear body 10 is mounted with a needle bearing 2 12, so as to increase the stability between the pin shaft body 11 and the planetary gear body 10 by using the needle bearing 2 12; the outer surface of the planetary gear body 10 is mounted with an inner gear ring 13, wherein the planetary gear body 10 is meshed with the outer ring of the sun gear shaft body 8 and the inner ring of the inner gear ring 13 respectively, and the inner gear ring 13 Installed to the right side of the oil seal 102; a planet carrier 15 is installed on the outer side of the sun gear shaft 8, and the planet carrier 15 is connected to multiple planetary gear bodies 10 through a pin shaft 11. Therefore, in the planetary reduction gear set, the sun gear shaft 8 serves as the input of power, and the planet carrier 15 serves as the output of power. The inner ring gear 13 is fixed, and the reduction ratio is 4. When the planet carrier 15 outputs one circle, the reduction ratio changes 4 times, and the maximum speed ratio and the minimum speed ratio appear 4 times each. A deep groove ball bearing 14 is installed on the outer surface of the planet carrier 15 to increase the stability of the planet carrier 15, wherein the outer surface of the deep groove ball bearing 14 contacts the inner surface of the inner ring gear 13.

[0038] Specifically, the working principle of the variable speed ratio reducer is as follows: when working, the motor output shaft is first connected to the input gear shaft 2 through bolts and screw holes to transmit the power of the motor to the input gear shaft 2, and the primary driving gear 3 on the input gear shaft 2 is meshed with the primary driven gear 5 on the intermediate shaft body 4 to complete the first deceleration, and then the secondary elliptical driving gear 6 on the intermediate shaft body 4 is meshed with the secondary elliptical driven gear 7 on the sun gear shaft body 8 to achieve the second deceleration. It is worth noting that the secondary elliptical driving gear 6 and the secondary elliptical driven gear 7 adopt an elliptical gear design, and the meshing reduction ratio thereof will change with the change of the meshing position, which enables the reducer to automatically adjust the reduction ratio under specific working conditions, such as when the reversing valve switches to the dead point, to increase the reversing speed and reduce the hydraulic power loss;

[0039] In addition, the sun gear body 9 on the sun gear shaft body 8, the planetary gear body 10 and the inner gear ring 13 form a planetary reduction gear set, which further improves the reduction ratio. When the planet carrier 15 is used as power output, its output speed is 1 / 4 of the input speed, that is, the reduction ratio is 4. In the whole process, through the reasonable arrangement of various bearings and oil seals, the stability and sealing of the transmission are ensured, the leakage of lubricating oil is avoided, and the long-term stable operation of the equipment is guaranteed.

[0040] The above description is only an embodiment of the present application and is not intended to limit the scope of protection of the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0041] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A variable speed ratio reducer, characterized in that: include: A front housing (1), the right side of the front housing (1) is connected to a rear housing (101) by bolts, an input gear shaft (2) for providing power is installed through the middle of the front housing (1), and the input gear shaft (2) is connected to the output shaft of the motor, an intermediate shaft body (4) is installed transversely at the upper end of the inner cavity of the front housing (1), and a sun gear shaft body (8) is installed transversely in the middle of the inner cavity of the front housing (1), wherein the sun gear shaft body (8) is installed coaxially with the input gear shaft (2), and a planetary reduction gear set is installed on the right side of the surface of the sun gear shaft body (8).

2. The variable speed ratio reducer according to claim 1, characterized in that: An oil seal (102) is sleeved at the opening on the right side of the inner cavity of the rear housing (101), and an oil seal (201) is sleeved at the opening on the left side of the inner cavity of the front housing (1) and located on the outer side of the surface of the input gear shaft (2). A deep groove ball bearing (202) is sleeved at the left side of the inner cavity of the front housing (1) and located on the surface (200).

3. The variable speed ratio reducer according to claim 2, characterized in that: A first-stage driving gear (3) is sleeved on the right side of the surface of the input gear shaft (2), and a first-stage driven gear (5) is sleeved on the left side of the surface of the intermediate shaft body (4), wherein the first-stage driving gear (3) and the first-stage driven gear (5) are meshed with each other.

4. The variable speed ratio reducer according to claim 3, characterized in that: The front and rear ends of the surface of the intermediate shaft body (4) are respectively provided with a second deep groove ball bearing (401) and a third deep groove ball bearing (402). The second deep groove ball bearing (401) and the third deep groove ball bearing (402) are used to support the intermediate shaft body (4) and improve its stability during rotation.

5. The variable speed ratio reducer according to claim 4, characterized in that: A secondary elliptical driving gear (6) is sleeved on the right side of the surface of the intermediate shaft body (4), and a secondary elliptical driven gear (7) is sleeved on the left end of the outer surface of the sun gear shaft body (8), wherein the secondary elliptical driven gear (7) and the sun gear shaft body (8) are meshed with each other.

6. The variable speed ratio reducer according to claim 5, characterized in that: The surfaces of the secondary elliptical driving gear (6) and the secondary elliptical driven gear (7) are both provided with dynamic balancing weight-reducing holes (701), and there are a plurality of dynamic balancing weight-reducing holes (701). A needle roller bearing (801) is sleeved on the left side of the outer surface of the sun gear shaft (8) and located in the inner cavity of the input gear shaft (2). The needle roller bearing (801) cooperates with the sun gear shaft (8) to achieve support for the sun gear shaft (8) and the input gear shaft (2).

7. The variable speed ratio reducer according to claim 6, characterized in that: The planetary reduction gear set comprises a sun wheel body (9) mounted on a sun wheel shaft body (8), and the outer ring of the sun wheel body (9) is meshedly connected with planetary wheel bodies (10) all around.

8. The variable speed ratio reducer according to claim 7, characterized in that: The inner ring of the planetary wheel body (10) is sleeved with a pin shaft body (11), and the side opposite to the pin shaft body (11) and the planetary wheel body (10) is sleeved with a second needle bearing (12).

9. The variable speed ratio reducer according to claim 8, characterized in that: The outer surface of the planetary gear body (10) is sleeved with an inner gear ring member (13), wherein the planetary gear body (10) is meshed with the outer ring of the sun gear shaft body (8) and the inner ring of the inner gear ring member (13) respectively.

10. The variable speed ratio reducer according to claim 9, characterized in that: A planet carrier (15) is installed on the outer side of the sun gear shaft body (8), and a deep groove ball bearing (14) is installed on the outer surface of the planet carrier (15).

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