Hybrid transmission reduction gear set gear durability test mechanism

Abstract

The utility model discloses a gear durability testing mechanism for a reduction gear set of a hybrid transmission, comprising a tested housing with a reduction gear set assembled therein, a sealing cover plate fixedly connected to the side opposite to the driving motor connection end of the tested housing; a support frame for supporting the tested housing is fixedly installed on one side of the sealing cover plate, a generator input shaft, a driving motor input / output shaft, an engine input shaft and a differential output shaft are spline-connected on the reduction gear set; two inner spline shaft holes are arranged on the sealing cover plate, and end bearings matched with the generator input shaft and the engine input shaft are arranged in the two inner spline shaft holes; lubricating oil holes are arranged beside the two inner spline shaft holes, and the lubricating oil holes are communicated with the corresponding lubricating oil channels in the tested housing through an oil guide hose; end oil seals sleeved on the generator output shaft and the engine input shaft are also arranged at the two inner spline shaft holes and on the outer side of the bearings.

Description

Technical Field

[0001] The utility model relates to the field of detection devices, in particular to a gear durability testing mechanism for a reduction gear set of a hybrid transmission. Background Art

[0002] The gearbox is a key component in the vehicle transmission system, and the performance of the gearbox directly affects the economy and power performance of the vehicle. The hybrid gearbox includes a housing, in which the electronic control components and the reduction mechanism are assembled. The durability of the gear set of the reduction mechanism has a huge impact on the service life of the equipment. Therefore, in the development process of the gearbox, it is essential to test the durability of the gears in the reduction gear set in the gearbox.

[0003] When conducting durability tests on the gears in the reduction gear set in the hybrid gearbox, the traditional test method is to connect the generator input, drive motor input and output of the hybrid gearbox to the corresponding dynamometer through a connecting shaft, and then drive the connecting shaft through the dynamometer to conduct a durability test. In the above test method, the gearbox also includes electronic control components such as the generator and drive motor, the box body is large and the fixing structure is complex. In addition, directly testing the entire machine is not convenient for transfer and confidentiality.

[0004] In order to solve the above problems, the applicant considered removing the rear housing in the gearbox case and the generator and engine mechanism in the case (the housing only includes the reduction gear set, the input / output shaft of the drive motor splined to the reduction gear set, and the differential output shaft), simulating the working conditions of the reduction gear set in the gearbox case, and conducting a durability test on the gears of the reduction gear set in the gearbox case. After removing the above generator and engine mechanism, one side of the case is open, and the lubrication pipeline on the rear housing is also removed at the same time. It is necessary to restructure the generator input end and the engine input end according to the structure of the hybrid gearbox, and seal the case. In the process of structural reconstruction, how to ensure the stability of the structure is an urgent problem to be solved. Summary of the invention

[0005] In view of the above-mentioned deficiencies in the prior art, the purpose of the present utility model is to provide a gear durability testing mechanism for a reduction gear set of a hybrid transmission, so as to solve the problems that the tested transmission is difficult to fix and support and is inconvenient to keep confidential in the existing durability testing device.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A gear durability testing mechanism for a reduction gear set of a hybrid transmission comprises a tested housing with a reduction gear set installed therein, a sealing cover plate fixedly connected thereto is provided on the side opposite to the driving motor connection end of the tested housing, and the sealing cover plate seals the reduction gear set in the tested housing; a support frame for supporting the tested housing is fixedly installed on one side of the sealing cover plate, a generator input shaft, a driving motor input / output shaft, an engine input shaft and a differential output shaft are spline-connected on the reduction gear set, the generator input shaft and the engine input shaft are located on the same side, and the ends thereof extend out of the sealing cover plate; There are two inner spline shaft holes respectively matched with the generator input shaft and the engine input shaft, and end bearings matched with the generator input shaft and the engine input shaft are arranged in the two inner spline shaft holes; lubricating oil holes corresponding to the end bearings are arranged on the sealing cover plate and beside the two inner spline shaft holes, and the lubricating oil holes are connected with the corresponding lubricating oil channels in the tested housing through oil guide hoses; end oil seals sleeved on the generator output shaft and the engine input shaft are also arranged at the two inner spline shaft holes and outside the bearings, and the generator input shaft and the engine input shaft are both rotatably sealed with the sealing cover plate through the end oil seals. In this way, only the reduction gear set to be tested is arranged in the tested housing, and the electric control components such as the generator and the drive motor are all disassembled, which can effectively ensure the confidentiality of the internal structure of the hybrid transmission, and at the same time, it can also reduce the volume and weight of the tested device. After the sealing cover plates are installed on both sides of the tested housing, the cover plates are in a flat shape, which is convenient for fixing with the dynamometer and the support frame, and the reduction gear set in the tested housing is sealed inside. The generator input shaft is used to replace the motor shaft connected to the reduction gear set, and the engine input shaft is used to replace the engine shaft in the original hybrid gearbox; during the test, according to the working condition to be tested, the dynamometer is connected to the generator input shaft, the drive motor input / output shaft is connected to another dynamometer, and the power is output through the generator input shaft, the reduction gear set, and the drive motor input / output shaft to form a pair of drags, forming a test mechanism for the first working condition; the drive motor input / output shaft is used as the power input end, the drive motor input / output shaft is connected to the corresponding side dynamometer, and the generator input shaft is disconnected from the dynamometer. At this time, after the power is input through the drive motor, it is transmitted to the reduction gear set, and finally the power is output by the differential output shaft on the reduction gear set, simulating the second working condition, and performing a durability test on the reduction gear set; the generator input shaft, the drive motor and the dynamometer are disconnected, and the engine input shaft is connected to the dynamometer. After the power is input through the engine input shaft, it is transmitted to the reduction gear set, and finally the power is output through the differential output shaft on the reduction gear set, simulating the third working condition, and performing a durability test on the reduction gear set.In addition to simulating the transmission mechanism of the hybrid transmission to conduct durability tests on the reduction gear set, the lubricating oil holes are connected to the lubricating oil channels built into the tested housing to lubricate the bearings on each test shaft, simulating the lubricating oil system of the hybrid transmission. This can effectively ensure the smooth progress of the test process and avoid malfunctions due to insufficient lubrication.

[0008] Furthermore, two shaft shoulders are arranged at intervals in the middle of the generator input shaft, and a middle bearing sleeved on the generator input shaft is arranged in the tested housing, and the end bearing and the middle bearing on the generator input shaft are both located on one side of the shaft shoulder. In this way, two bearings are sleeved on the generator input shaft, which can effectively ensure its stable operation, and the arranged shaft shoulders can limit the bearings.

[0009] Furthermore, the sealing cover plate is provided with assembly holes corresponding to the generator input shaft and the engine input shaft, and a shaft sleeve coaxial with the assembly hole is provided on the side of the two assembly holes facing the tested housing, and the shaft sleeve and the assembly hole form the internal spline shaft hole. In this way, the internal spline shaft hole is composed of the assembly hole and the shaft sleeve, which can ensure that there is enough space to set the internal spline, and can also effectively reduce the thickness of the sealing cover plate, saving the test cost.

[0010] Furthermore, a dynamometer drive shaft spline-connected to the generator input shaft is provided at the outer end thereof. In this way, the generator input shaft 4 and the dynamometer drive shaft are spline-connected, and the connection structure is stable.

[0011] Furthermore, the support frame includes two support columns arranged at intervals, and a mounting seat that can move up and down and be positioned along the support columns is sleeved on the two support columns, and a suspension cushion is detachably mounted on the two mounting seats, and the two suspension cushions are installed at the same height, and a fixing plate is fixedly mounted on the sealing cover plate, and two flat plates connected to the suspension cushion by fasteners and arranged horizontally are arranged at intervals on the outside of the fixing plate. In this way, the lower end of the support column is fixed to the ground, and the upper end is used to support the shell under test. After the mounting seat can move up and down and be positioned, the fixed height of the shell under test can be adjusted according to the installation height of the dynamometer, and the installation height of different models of the tested devices can be adjusted. The suspension cushion can form a buffer during the test process to reduce the vibration of the shell under test 1 during the test process.

[0012] Further, a lateral support plate is fixedly installed on one side opposite to the two mounting seats, and the suspension cushion is fixedly installed on the corresponding lateral support plate. In this way, the mounting seat and the suspension cushion are connected through the lateral support plate, which can provide sufficient installation space for the suspension cushion.

[0013] Furthermore, the suspension cushion is made of rubber, a rectangular through hole is provided in the middle of the suspension cushion, and a plurality of mounting holes are provided at the lower end of the rectangular through hole. The suspension cushion is connected to the lateral support plate by threads after the fastening bolts pass through the mounting holes. In this way, the cushion is made of rubber, so that the cushion has both certain flexibility and certain strength. The rectangular through hole provided in the middle of the suspension cushion 93 can facilitate the fastening bolts to extend into the corresponding position during installation, and the mounting holes provided under the rectangular through hole can facilitate the fastening bolts to fit and fix the suspension cushion.

[0014] Furthermore, a plurality of threaded holes are provided on one side or around the mounting seat, and the mounting seat is fixed to the supporting column by means of a tightening bolt and a threaded engagement with the threaded hole. In this way, the mounting seat and the supporting column are tightened and fixed by the tightening bolt, and the fixing method is stable, and when there is no tightening, the mounting seat can slide up and down under the action of an external force. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of a gear durability testing mechanism of a reduction gear set of a hybrid transmission in an embodiment;

[0016] Figure 2 It is a three-dimensional structural diagram of another aspect of the gear durability testing mechanism of the reduction gear set of the hybrid transmission in the embodiment;

[0017] Figure 3 It is a cross-sectional schematic diagram of the installation structure of the output shaft of the generator in the gear durability testing mechanism of the reduction gear set in the embodiment;

[0018] Figure 4 It is a schematic diagram of the cross-sectional structure of the input / output shaft of the driving motor in the gear durability testing mechanism of the reduction gear set in the embodiment. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model clearer, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. The components of the embodiment of the utility model generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiment of the utility model provided in the drawings is not intended to limit the scope of the utility model claimed for protection, but merely represents the selected embodiment of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model.

[0020] It should be noted that similar numbers 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. In the description of the utility model, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the invention product is usually placed when used, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In addition, the terms "horizontal", "vertical", etc. do not mean that the components are absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted. In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] like Figure 1-Figure 3As shown, the gear durability testing mechanism of the reduction gear set of the hybrid transmission provided in this embodiment includes a tested housing 1 with the reduction gear set assembled therein, a sealing cover plate 2 fixedly connected thereto is installed on the side opposite to the driving motor end of the tested housing 1, and the sealing cover plate 2 seals the reduction gear set in the tested housing 1; a support frame 9 for supporting the tested housing 1 is fixedly installed on one side of the sealing cover plate 2, and a generator input shaft 4, a driving motor input / output shaft 8, an engine input shaft 5 and a differential output shaft 10 are spline-connected on the reduction gear set, and the generator input shaft 4 and the engine input shaft 5 are located on the same side, and the ends thereof extend out of the sealing cover plate 2; two sealing covers 2 are provided on the sealing cover plate 2, which are connected to the generator input shaft 4 and the engine output shaft 10, respectively. The two inner spline shaft holes 21 are provided with end bearings 6 that match the generator input shaft 4 and the engine input shaft 5, and the drive motor input / output shaft 8 is connected to the corresponding dynamometer through an internal replacement flange connected to the spline thereof; on the sealing cover plate 2, there are provided lubricating oil holes corresponding to the end bearings 6 beside the two inner spline shaft holes 21, and the two lubricating oil holes are connected to the corresponding lubricating oil channels in the measured housing 1 through oil guide hoses; at the two inner spline shaft holes 21, the outer side of the end bearings 6 is also provided with an end oil seal 7 sleeved on the generator output shaft and the engine input shaft 5, and the generator input shaft 4 and the engine input shaft 5 are both rotatably sealed with the sealing cover plate 2 through the end oil seal 7.

[0022] In the tested housing 1 of the test mechanism in this embodiment, only the reduction gear set to be tested is set, and the electric control components such as the generator and the drive motor are all disassembled, which can effectively ensure the confidentiality of the internal structure of the hybrid transmission, and at the same time, it can also reduce the volume and weight of the tested device. After the sealing cover plate 2 is installed on the unsealed side of the tested housing 1, the cover plate is in a flat shape, which is convenient for fixing with the corresponding dynamometer and the support frame 9, and the reduction gear set in the tested housing 1 is sealed inside. The generator input shaft 4 is used to replace the motor shaft connected to the reduction gear set, and the engine input shaft 5 is used to replace the engine shaft in the original hybrid transmission; during the test, according to the working condition to be tested, the dynamometer is connected to the generator input shaft 4, and the drive motor input / output shaft 8 is connected to another dynamometer, and the power is output through the generator input shaft 4, the reduction gear set, and the drive motor input / output shaft 8, forming a pair of drags, forming a test mechanism of the first working condition; the drive motor input / output shaft 8 is used as the power input end, and the drive motor input / output shaft 8 is connected to the corresponding side test dynamometer, disconnect the generator input shaft 4 from the dynamometer. At this time, the power is input through the drive motor and then transmitted to the reduction gear set, and finally the power is output by the differential output shaft 10 on the reduction gear set, simulating the second working condition, and performing a durability test on the reduction gear set; disconnect the generator input shaft 4, the drive motor and the dynamometer, connect the engine input shaft 5 to the dynamometer, and the power is input through the engine input shaft 5 and then transmitted to the reduction gear set, and finally the power is output by the differential output shaft 10 on the reduction gear set, simulating the third working condition, and performing a durability test on the reduction gear set. In addition to simulating the transmission mechanism of the hybrid gearbox to perform a durability test on the reduction gear set, the lubricating oil hole is connected to the lubricating oil channel built into the tested housing 1, forming lubrication for the bearings on each test shaft, simulating the lubricating oil system of the hybrid gearbox, and effectively ensuring the smooth progress of the test process to avoid failures due to insufficient lubrication.

[0023] Furthermore, two shaft shoulders are provided at intervals in the middle of the generator input shaft 4, and a middle bearing 3 sleeved on the generator input shaft 4 is provided in the tested housing 1, and the end bearing 6 and the middle bearing 3 on the generator input shaft 4 are both located on one side of the shaft shoulder. In this way, two bearings are sleeved on the generator input shaft 4, which can effectively ensure its stable operation, and the provided shaft shoulders can limit the bearings.

[0024] Furthermore, the sealing cover plate 2 is provided with assembly holes corresponding to the generator input shaft 4 and the engine input shaft 5, and a shaft sleeve coaxial with the assembly hole is provided on the side of the two assembly holes facing the tested housing 1, and the shaft sleeve and the assembly hole form the internal spline shaft hole 21. In this way, the internal spline shaft hole 21 is composed of the assembly hole and the shaft sleeve, which can ensure that there is enough space to set the internal spline, and can also effectively reduce the thickness of the sealing cover plate 2, saving the test cost.

[0025] Furthermore, a dynamometer drive shaft spline-connected to the generator input shaft 4 is provided at the outer end thereof. In this way, the generator input shaft 4 and the dynamometer drive shaft are spline-connected, and the connection structure is stable.

[0026] Further, the support frame 9 includes two support columns 91 arranged at intervals, and a mounting seat 92 which can move up and down and be positioned along the support columns 91 is sleeved on the two support columns 91, and a suspension cushion 93 is detachably mounted on the two mounting seats 92, and the two suspension cushions 93 are installed at the same height, and a fixing plate 94 is fixedly mounted on the sealing cover plate 2, and two flat plates 941 connected to the suspension cushion 93 by fasteners and arranged horizontally are arranged at intervals on the outer side of the fixing plate 94, and the flat plates 941 are welded and fixed to the fixing plate 94, and a reinforcing plate 942 is also arranged on each side of the flat plate, one side of which is fixedly connected to the fixing plate 94, and the side end is fixedly connected to the fixing plate 94. In this way, the lower end of the support column 91 is fixed to the ground, and the upper end is used to support the measured housing 1. After the mounting seat 92 can move up and down and be positioned, the fixed height of the measured housing 1 can be adjusted according to the installation height of the dynamometer, and the installation height of different types of measured devices can be adjusted. The provided suspension cushion 93 can form a buffer during the test process to reduce the vibration of the tested housing 1 during the test process.

[0027] Further, a lateral support plate is fixedly mounted on one side opposite to the two mounting seats 92, and the suspension cushion 93 is fixedly mounted on the corresponding lateral support plate. In this way, the mounting seat 92 and the suspension cushion 93 are connected via the lateral support plate, which can provide sufficient installation space for the suspension cushion 93.

[0028] Furthermore, the suspension cushion 93 is made of rubber, a rectangular through hole is provided in the middle of the suspension cushion 93, and a plurality of mounting holes are provided at the lower end of the rectangular through hole. After the fastening bolts pass through the mounting holes, the suspension cushion 93 is connected to the lateral support plate by threads. In this way, the cushion is made of rubber, so that the cushion has both certain flexibility and certain strength. The rectangular through hole provided in the middle of the suspension cushion 93 can facilitate the fastening bolts to extend into the corresponding position during installation, and the mounting holes provided under the rectangular through hole can facilitate the fastening bolts to fit and fix the suspension cushion 93.

[0029] Furthermore, a plurality of threaded holes are provided on one side or around the mounting seat 92, and the mounting seat 92 is fixed to the supporting column 91 by means of a tightening bolt and a threaded engagement with the threaded hole. A scale line is also provided in the height direction of the supporting column 91, which is used to precisely adjust and control the height of the mounting seat 92, so that the mounting seats 92 on both sides are at the same installation height. In this way, the mounting seat 92 and the supporting column 91 are tightened and fixed by the tightening bolts, and the fixing method is stable, and when not tightened, they can slide up and down under the action of external force.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit the technical solution. Ordinary technicians in this field should understand that those modifications or equivalent replacements of the technical solution of the utility model without departing from the purpose and scope of the technical solution of the utility model should be included in the scope of the claims of the utility model.

Claims

1. A gear durability testing mechanism for a reduction gear set of a hybrid transmission, comprising a tested housing with a reduction gear set mounted therein, characterized in that: A sealing cover plate fixedly connected thereto is provided on the side opposite to the driving motor connection end of the tested housing, and the sealing cover plate seals the reduction gear set in the tested housing; a support frame for supporting the tested housing is fixedly installed on one side of the sealing cover plate, and the generator input shaft, the driving motor input / output shaft, the engine input shaft and the differential output shaft are spline-connected on the reduction gear set, and the generator input shaft and the engine input shaft are located on the same side, and the ends extend out of the sealing cover plate; two inner spline shaft holes respectively matching the generator input shaft and the engine input shaft are provided on the sealing cover plate, and end bearings matching the generator input shaft and the engine input shaft are provided in the two inner spline shaft holes; lubricating oil holes corresponding to the end bearings are provided on the sealing cover plate beside the two inner spline shaft holes, and the lubricating oil holes are connected to the corresponding lubricating oil channels in the tested housing through oil guide hoses; end oil seals sleeved on the generator output shaft and the engine input shaft are also provided at the two inner spline shaft holes and on the outer side of the bearings, and the generator input shaft and the engine input shaft are both rotationally sealed with the sealing cover plate through the end oil seals.

2. The hybrid transmission reduction gear set gear durability testing mechanism according to claim 1, characterized in that: Two shaft shoulders are arranged at intervals in the middle of the generator input shaft, a center bearing sleeved on the generator input shaft is arranged in the measured housing, and the end bearing and the center bearing on the generator input shaft are both located on one side of the shaft shoulder.

3. The hybrid transmission reduction gear set gear durability testing mechanism according to claim 1, characterized in that: The sealing cover plate is provided with assembly holes corresponding to the generator input shaft and the engine input shaft, and a shaft sleeve coaxial with the assembly hole is provided on the side of the two assembly holes facing the measured shell, and the shaft sleeve and the assembly hole form the inner spline shaft hole.

4. The hybrid transmission reduction gear set gear durability testing mechanism according to claim 1, 2 or 3, characterized in that: A dynamometer transmission shaft spline-connected to the generator input shaft is provided at the outer end of the generator input shaft.

5. The hybrid transmission reduction gear set gear durability testing mechanism according to claim 1, 2 or 3, characterized in that: The support frame includes two support columns arranged at intervals, and a mounting seat that can move up and down and be positioned along the support columns is sleeved on the two support columns. A suspension pad is detachably mounted on the two mounting seats, and the two suspension pads are installed at the same height; a fixing plate is fixedly mounted on the sealing cover plate, and two flat plates connected to the suspension pads by fasteners and arranged horizontally are arranged at intervals on the outside of the fixing plate.

6. The hybrid transmission reduction gear set gear durability testing mechanism according to claim 5, characterized in that: A lateral support plate is fixedly mounted on one side opposite to the two mounting seats, and the suspension cushion is fixedly mounted on the corresponding lateral support plate.

7. The hybrid transmission reduction gear set gear durability testing mechanism according to claim 6, characterized in that: The suspension cushion is made of rubber, a rectangular through hole is provided in the middle of the suspension cushion, and a plurality of mounting holes are provided at the lower end of the rectangular through hole. The suspension cushion is connected to the lateral support plate by threads after the fastening bolts pass through the mounting holes.

8. The hybrid transmission reduction gear set gear durability testing mechanism according to claim 6, characterized in that: A plurality of threaded holes are arranged on one side or around the mounting seat, and the mounting seat is fastened and fixed on the supporting column after the mounting seat is threadedly matched with the threaded holes by the fastening bolts.

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