Replacement tool for differential mechanism in new energy speed reducer

Abstract

The utility model relates to the field of speed reducers, and discloses a replacement tool for a differential mechanism in a new energy speed reducer, which comprises a shell, a first replacement block, a second replacement block and a vertical shaft which form an integral power transmission unit. Second holes are formed in the top and the bottom of the shell, the first replacement block is connected into the shell and provided with first through holes coinciding with the first holes, the second replacement block is connected with the first replacement block and provided with third through holes coinciding with the second holes, and the vertical shaft penetrates through the third through holes and is fixedly connected with the second holes. The replacement tool can be repeatedly used, meets the requirement of replacing a differential mechanism for an endurance test, converts power, enables the power to flow in from an input shaft of a speed reducer and flow out from an output shaft on the opposite side, reduces the number and cost of dynamometers, and improves the testing efficiency. Meanwhile, the problem of interference between an input end dynamometer and an output end dynamometer on the same side when an electric drive assembly arranged at a large angle executes an endurance test on a rack is solved.

Description

Technical Field

[0001] The utility model relates to the field of speed reducers, and particularly to a differential replacement tooling inside a new energy speed reducer. Background Art

[0002] With the continuous aggravation of the global energy crisis and environmental pollution problems, new energy vehicles have gradually become an inevitable trend in the development of the global automotive industry. The service life of new energy vehicles is one of the key performance indicators and is directly affected by the durability performance of the electric drive assembly. As an important component in the electric drive assembly, the durability performance of the speed reducer directly affects the durability performance of the electric drive assembly. Therefore, the durability test of a single speed reducer is a very important link. However, when testing durability, since the layout angles (the angle between the connecting line of the input shaft and the output shaft and the horizontal plane) of most electric drive assemblies on the vehicle are relatively small, within ±30°, when conducting durability tests on a test bench using the prior art, 1 dynamometer is connected to the input end of the speed reducer, and 2 dynamometers are connected to the output end of the speed reducer. However, when testing a large-angle arranged electric drive assembly (such as when the connecting line of the input shaft and the output shaft is perpendicular to the horizontal plane), it will be impossible to set up due to interference between the input-end dynamometer and the output-shaft dynamometer on the same side. Summary of the Utility Model

[0003] In order to overcome the above-mentioned technology, the utility model provides a differential replacement tooling inside a new energy speed reducer. The replacement tooling can replace the differential, convert the power, so that the power flows in from the input shaft of the speed reducer and only flows out from the output shaft on the opposite side, reducing the number of dynamometers and the cost. At the same time, it solves the interference problem between the input-end dynamometer and the output-end dynamometer on the same side when a large-angle arranged electric drive assembly conducts a single speed reducer durability test on a test bench.

[0004] In order to achieve the above object, on the one hand, the utility model provides a differential replacement tooling inside a new energy speed reducer, and the replacement tooling includes:

[0005] A housing, with first holes provided at both ends of the housing, second holes provided at the top and bottom of the housing, and the housing is fixedly connected to the external main reduction gear;

[0006] A first replacement block, one end of the first replacement block is fixedly connected to one end inside the housing, and a first through hole corresponding to and coinciding with the first hole is provided on the first replacement block;

[0007] A second replacement block, one end of the second replacement block is fixedly connected to the other end of the first replacement block, a second through hole corresponding to and coinciding with the first hole is provided on the second replacement block, and third through holes corresponding to and coinciding with the second holes are provided on the top and bottom of the second replacement block;

[0008] The vertical shaft passes through the third through hole and is fixedly connected to the second hole.

[0009] Preferably, a circular ring is provided on the outer side of the housing, and the circular ring is arranged between the second hole and the first hole parallel to the vertical shaft;

[0010] Multiple groups of first screw holes are provided on the circular ring, and the circular ring is bolted to the main reduction gear through the first screw holes.

[0011] Preferably, a circular groove is provided at one end inside the housing, and a circular protrusion matching the circular groove is provided at one end of the first replacement block.

[0012] Preferably, two protrusions are provided at the other end of the first replacement block, and grooves corresponding to the protrusions are provided at one end of the second replacement block.

[0013] Preferably, a chamfer is provided at the top of the protrusion.

[0014] Preferably, multiple groups of teeth are provided on the inner wall of the first through hole for connecting the output shaft of an external dynamometer.

[0015] Preferably, a first pin hole is provided at one end of the vertical shaft, and a second pin hole corresponding to and coinciding with the first pin hole is provided on the housing for a pin to pass through the first pin hole and the second pin hole to fix the vertical shaft inside the housing.

[0016] Preferably, two symmetrical openings are provided on the housing.

[0017] Through the above technical solutions, the replacement tooling connects the housing, the vertical shaft, the second replacement block, and the first replacement block into a tight overall power transmission unit, which can be reused, meets the requirements for replacing the differential for durability tests, converts the power, enables the power to flow in from the input shaft of the reducer and only flow out from the output shaft on the opposite side, reduces the number of dynamometers, reduces costs, and simultaneously solves the interference problem between the input dynamometer and the output dynamometer on the same side during the single-reducer durability test of the electric drive assembly arranged at a large angle on the test bench. Description of the Drawings

[0018] Figure 1 is a cross-sectional schematic view of a differential replacement tooling inside a new energy reducer according to an embodiment of the present invention;

[0019] Figure 2 is a structural schematic view of a differential replacement tooling inside a new energy reducer according to an embodiment of the present invention;

[0020] Figure 3Schematic diagram of the first replacement block of a differential replacement tooling inside a new energy reducer according to an embodiment of the present utility model;

[0021] Figure 4 Schematic diagram of the second replacement block of a differential replacement tooling inside a new energy reducer according to an embodiment of the present utility model.

[0022] Description of reference numerals

[0023] 1. Housing 2. First replacement block

[0024] 3. Second replacement block 4. Vertical shaft

[0025] 11. First hole 12. Second hole

[0026] 13. Ring 14. Circular groove

[0027] 15. Second pin hole 16. Opening

[0028] 21. First through hole 22. Circular protrusion

[0029] 23. Protrusion 31. Second through hole

[0030] 32. Third through hole 33. Groove

[0031] 41. First pin hole 131. First screw hole

[0032] 211. Ratchet teeth 231. Chamfer Detailed implementation manners

[0033] The following will detail the specific implementation manners of the embodiments of the present utility model with reference to the accompanying drawings. It should be understood that the specific implementation manners described herein are only for explaining and illustrating the embodiments of the present utility model, and are not used to limit the embodiments of the present utility model.

[0034] As Figure 1 shown is a cross-sectional schematic diagram of a differential replacement tooling inside a new energy reducer according to an embodiment of the present utility model; as Figure 2 shown is a schematic diagram of a differential replacement tooling inside a new energy reducer according to an embodiment of the present utility model. In Figure 1 and Figure 2Among them, the replacement tooling can include a housing 1, a first replacement block 2, a second replacement block 3, and a vertical shaft 4. Specifically, first holes 11 are provided at both ends of the housing 1. The housing 1 is fixedly connected to the external main reduction gear, and second holes 12 are provided at the top and bottom of the housing 1. One end of the first replacement block 2 is fixedly connected to one end inside the housing 1, and a first through hole 21 corresponding to and coinciding with the first hole 11 is provided on the first replacement block 2. One end of the second replacement block 3 is fixedly connected to the other end of the first replacement block 2, and a second through hole 31 corresponding to and coinciding with the first hole 11 is provided on the second replacement block 3. Third through holes 32 corresponding to and coinciding with the second holes 12 are provided at the top and bottom of the second replacement block 3. The vertical shaft 4 passes through the third through holes 32 and is fixedly connected to the second holes 12. The housing 1, the first replacement block 2, the second replacement block 3, and the vertical shaft 4 are connected into an integral power transmission unit. At the same time, the output shaft of the dynamometer can sequentially pass through the first hole 12, the first through hole 21, and the second through hole 31 to complete the fixed connection with the replacement tooling, meeting the connection requirements for subsequent durability testing of the reducer.

[0035] In Figure 1 Among them, considering that the replacement tooling is a power transmission unit, when the power connection in the output aspect is completed through the first hole 12, the first through hole 21, and the second through hole 31, a reasonable connection should also be made in the input aspect. In an embodiment of the present invention, a circular ring 13 is provided on the outer side of the housing 1. The circular ring 13 is arranged between the second hole 12 and the first hole 11 parallel to the vertical shaft 4. Multiple groups of first screw holes 131 are provided on the circular ring 13. The circular ring 13 is bolted to the main reduction gear through the first screw holes 15. Since the main reduction gear of the reducer houses the differential replacement tooling, the circular ring 13 is provided on the housing 1 for easy connection according to the shape and rotation direction of the main reduction gear.

[0036] In Figure 1 Among them, considering the rotation requirements of the differential and the convenience of connecting the first replacement block in the housing, in an embodiment of the present invention, a circular groove 14 is provided at one end inside the housing 1. A circular protrusion 22 matching the circular groove 14 is provided at one end of the first replacement block 2. The circular groove 14 and the circular protrusion 22 fit together, making the first replacement block 2 more tightly connected to one end inside the housing 1, avoiding detachment and causing test failures.

[0037] As Figure 3 shown is a schematic structural diagram of the first replacement block of a differential replacement tooling inside a new energy reducer according to an embodiment of the present invention; as Figure 4 shown is a schematic structural diagram of the second replacement block of a differential replacement tooling inside a new energy reducer according to an embodiment of the present invention. In Figure 3 and 4In order to meet the authenticity of the replacement requirements of the replacement tooling, a stable connection is required between the first replacement block 2 and the second replacement block 3 to meet the replacement requirements. In an embodiment of the present invention, two protrusions 23 are provided at the other end of the first replacement block 2, and a groove 33 corresponding to the protrusion 23 is provided at one end of the second replacement block 3. The fitting arrangement of the two can not only replace the gear connection in the real differential, but also avoid the instability of the connection between the two and cause detachment. In order to facilitate the combination of the first replacement block 2 and the second replacement block 3, in an embodiment of the present invention, a chamfer 231 is provided at the top of the protrusion 23 to facilitate the assembly of the two.

[0038] In Figure 3 order to facilitate the connection of the output shaft and ensure the requirements of power transmission, in an embodiment of the present invention, multiple sets of teeth 211 are provided on the inner wall of the first through hole 21 for connecting the output shaft of an external dynamometer, thereby ensuring the stability of the durability test.

[0039] Considering that the replacement tooling is a power transmission unit and the vertical shaft 4 plays a stabilizing role in it, in order to prevent the vertical shaft 4 from falling off, in an embodiment of the present invention, a first pin hole 41 is provided at one end of the vertical shaft 4, and a second pin hole 15 corresponding to and coinciding with the first pin hole 41 is provided on the housing 1. A pin is used to pass through the first pin hole 41 and the second pin hole 15 to fix the vertical shaft 4 in the housing 1, so that the connection of the replacement tooling is tighter. At the same time, the positions of the pin hole and the pin are perpendicular to the rotation surface and remain stationary, which is convenient for the subsequent disassembly and installation of the replacement tooling and also reduces the cost.

[0040] In the figure, in order to facilitate the first replacement block 2 and the second replacement block 3 to be placed in the housing 1, and at the same time ensure the strength of the housing 1 of the replacement tooling and the stability during rotation, in an embodiment of the present invention, two symmetrical openings 16 are provided on the housing 1 to avoid damage caused by unbalanced rotation due to a single opening, and it is also convenient for the installation operation when the first replacement block 2 and the second replacement block 3 enter.

[0041] Through the above technical solutions, the replacement tooling connects the housing, the vertical shaft, the second replacement block and the first replacement block into a tight overall power transmission unit, which can be reused, meets the requirements of replacing the differential for durability tests, converts the power, makes the power flow in from the input shaft of the reducer and only flows out from the output shaft on the opposite side, reduces the number of dynamometers, reduces the cost, and at the same time solves the interference problem between the input dynamometer and the output dynamometer on the same side when the large-angle arranged electric drive assembly performs a single reducer durability test on the test bench.

[0042] The preferred embodiments of the present utility model have been described in detail above in conjunction with the accompanying drawings. However, the present utility model is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present utility model, various simple modifications can be made to the technical solutions of the present utility model, and these simple modifications all fall within the protection scope of the present utility model. In addition, it should be noted that, in the above specific embodiments, the various specific technical features described can be combined in any appropriate manner without conflict. To avoid unnecessary repetition, the present utility model will not separately describe various possible combination manners.

[0043] In addition, any combination can be made between various different embodiments of the present utility model as long as it does not violate the idea of the present utility model, and it should equally be regarded as the content disclosed by the present utility model.

Claims

1. A new energy reducer internal differential replacement tooling, characterized in that: The alternative tooling includes: A housing, wherein first holes are disposed at both ends of the housing, second holes are disposed at the top and bottom of the housing, and the housing is fixedly connected to an external main reduction gear; A first replacement block, one end of which is fixedly connected to one end in the housing, and the first replacement block is provided with a first through hole corresponding to and overlapping the first hole; A second replacement block, one end of which is fixedly connected to the other end of the first replacement block, and the second replacement block is provided with a second through hole corresponding to and overlapping with the first hole, and the top and bottom of the second replacement block are provided with a third through hole corresponding to and overlapping with the second hole; A vertical axis passes through the third through hole and is fixedly connected to the second hole.

2. The replacement tool according to claim 1, characterized in that: A circular ring is disposed on the outer side of the shell, and the circular ring is disposed between the second hole and the first hole in parallel with the vertical axis; The circular ring is provided with a plurality of groups of first screw holes, and the circular ring is bolted to the main reduction gear through the first screw holes.

3. The replacement tool according to claim 1, characterized in that: A circular ring groove is arranged at one end of the shell body, and a circular ring protrusion matching with the circular ring groove is arranged at one end of the first replacement block.

4. The replacement tool according to claim 1, characterized in that: The other end of the first replacement block is provided with two protrusions, and one end of the second replacement block is provided with grooves corresponding to the protrusions.

5. The replacement tool according to claim 4, characterized in that: The top of the protrusion is provided with a chamfer.

6. The replacement tool according to claim 1, characterized in that: A plurality of groups of teeth are arranged on the inner wall of the first through hole for connecting to the output shaft of an external dynamometer.

7. The replacement tool according to claim 1, characterized in that: A first pin hole is provided at one end of the vertical shaft, and a second pin hole corresponding to and overlapping the first pin hole is provided on the shell, so that a pin bolt passes through the first pin hole and the second pin hole to fix the vertical shaft in the shell.

8. The replacement tool according to claim 1, characterized in that: The shell is provided with two symmetrical openings.

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