Chain drive power assembly to tow test bed

Abstract

The chain transmission power assembly pair test bench comprises a test bench, characterized in that: it further comprises a suspension support for suspending the power assembly, a sprocket assembled on the input shaft of the power assembly and a chain engaged with the sprocket, the number of the suspension supports is two, one power assembly is suspended on each suspension support, the sprockets on the two power assemblies are connected in transmission through the chain, and the mounting position of the suspension support on the test bench is adjustable. In the utility model, the power assembly is suspended on the suspension support to simulate the mounting mode of the electric drive power assembly of the electric power-assisted bicycle suspended through the frame, the engagement transmission of the sprocket and the chain forms the chain transmission pair test of the two power assemblies, the operation mode of the chain transmission of the electric drive power assembly of the electric power-assisted bicycle is the same, the suspension mounting and the chain transmission of the electric drive power assembly of the electric power-assisted bicycle are simulated, and the reliability and effectiveness of the test are improved.

Description

Technical Field

[0001] This utility model relates to a chain drive powertrain towing test bench for towing tests of two powertrains. Background Technology

[0002] Electric-assisted bicycles, as a product for short-distance travel, provide auxiliary power through electric motors and battery packs, making riding easier and more convenient, and are favored by consumers. As one of the core components of the whole vehicle, the electric drive power assembly of electric-assisted bicycles must undergo sufficient durability and NVH tests before mass production in the factory. To test the durability and NVH performance of electric drive assemblies and improve testing efficiency, a common practice is to use a towing test device to perform towing tests on two electric drive assemblies simultaneously. For example, CN112394251A discloses a towing test bench and method for electric drive systems, including two electric drive assemblies, two buses, a host computer, a data acquisition system, a coupling, and an environmental chamber. This scheme connects the output shafts of the two electric drive assemblies through the coupling and controls the operation of the assemblies through the host computer. However, the installation state of the electric drive system in the above scheme is different from the installation state of the electric drive assembly in an electric-assisted bicycle, which is suspended by the frame. Moreover, the towing transmission of the two electric drive systems using a coupling in the above scheme is different from the chain drive operation of the electric drive assembly in an electric-assisted bicycle. It cannot simulate the installation and transmission of the electric drive assembly in an electric-assisted bicycle, affecting the reliability of the test. The purpose of this scheme is to design a towing test device that can simulate the installation and transmission of the electric drive assembly in an electric-assisted bicycle. Utility Model Content

[0003] The chain-driven powertrain towing test bench provided by this utility model simulates the electric drive powertrain of an electric-assisted bicycle through the frame suspension installation method. The two powertrains are towed by chain drive through the meshing of the chain and chain, which is the same as the operation mode of the chain drive of the electric drive powertrain of an electric-assisted bicycle. This simulates the suspension installation and chain drive of the electric drive powertrain of an electric-assisted bicycle, improving the reliability and effectiveness of the test.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A chain-driven powertrain test bench includes a test bench, characterized in that it further includes a suspension bracket mounted on the test bench for suspending the powertrain, a sprocket mounted on the input shaft of the powertrain, and a chain meshing with the sprocket. The number of suspension brackets is two, with one powertrain suspended on each suspension bracket. The sprockets on the two powertrains are connected by a chain to form a transmission connection. The installation position of the suspension brackets on the test bench is adjustable.

[0005] Preferably, the suspension bracket includes a frame-shaped support frame and a support leg integrally formed at the bottom of the support frame. The support leg is positioned on the test bench by bolts. Bolt holes corresponding to the mounting holes of the powertrain are opened on the support frame. The bolts pass through the mounting holes of the powertrain and the bolt holes and are tightened to suspend the powertrain on the suspension bracket.

[0006] Preferably, the suspension bracket has two support legs, each support leg has two positioning blocks, the four positioning blocks on the suspension bracket are arranged in a rectangular shape, two position adjustment holes are opened on the test platform, the position adjustment holes are opened along the direction of the two suspension brackets, the positioning blocks are positioned in the position adjustment holes by bolts, and the installation position of the suspension bracket on the test platform is adjusted as the positioning blocks move along the position adjustment holes.

[0007] Preferably, at least one suspension bracket is equipped with a tensioning wheel for tensioning the chain, the tensioning wheel engaging with the chain.

[0008] Preferably, the suspension bracket has a tensioning wheel mounting hole for mounting the tensioning wheel. The tensioning wheel mounting hole is a strip-shaped hole opened vertically, and the wheel axle of the tensioning wheel is positioned in the tensioning wheel mounting hole by bolts.

[0009] The beneficial effects of this utility model are: This utility model discloses a chain-driven powertrain towing test bench. It has two suspension brackets, with the powertrain suspended on each bracket. A chainring is mounted on the input shaft of each powertrain, and the chainrings on both powertrains are connected by a chain. When one powertrain is running, the other powertrain is driven synchronously through the chainring and chain, forming a towing test between the two powertrains. The powertrains are suspended on the brackets, simulating the electric drive system of an electric-assisted bicycle, which is mounted on the frame. The chainring and chain drive create a chain-driven towing test between the two powertrains, similar to the chain drive operation of an electric-assisted bicycle. This simulation of the suspension and chain drive of the electric drive system improves the reliability and effectiveness of the test. By installing corresponding sensors on the powertrains to monitor real-time changes in torque, speed, and temperature during operation, the durability and NVH performance of the two powertrains can be tested simultaneously. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the chain drive powertrain test bench in Example 1.

[0011] Figure 2 This is a schematic diagram of the chain drive powertrain towing test bench in Example 2. Detailed Implementation

[0012] The following is combined Figures 1-2 The embodiments of this utility model will be described in detail below. Example 1

[0013] A chain-driven powertrain test bench includes a test bench 1, characterized in that it further includes a suspension bracket 2 mounted on the test bench 1 for suspending a powertrain 100, a chain 3 mounted on the input shaft of the powertrain 100, and a chain 4 meshing with the chain 3. The number of suspension brackets 2 is two, and one powertrain 100 is suspended on each suspension bracket 2. The chain 3 on the two powertrains 100 are connected by the chain 4. The installation position of the suspension bracket 2 on the test bench 1 is adjustable.

[0014] The chain-driven powertrain towing test bench described above has two suspension brackets 2. The powertrain 100 is suspended on the suspension brackets 2. Chainrings 3 are mounted on the input shaft of the powertrain 100. The chainrings 3 on the two powertrains 100 are connected by a chain 4. When one powertrain 100 is driven, the other powertrain 100 is driven synchronously through the transmission of the chainrings 3 and the chain 4, forming a towing test between the two powertrains. The powertrain 100 is suspended on the suspension brackets 2 to simulate the electric driving force of an electric-assisted bicycle. The assembly is mounted on the frame and the chain drive of the chainring 3 and chain 4 forms a chain drive between two power assemblies 100, which is the same as the chain drive of the electric drive power assembly of an electric-assisted bicycle. This simulates the mounting and chain drive of the electric drive power assembly of an electric-assisted bicycle, improving the reliability and effectiveness of the test. By setting corresponding sensors on the power assembly 100 to monitor the real-time changes in torque, speed and temperature during its operation, the durability and NVH performance of the two power assemblies 100 can be tested simultaneously.

[0015] The suspension bracket 2 includes a frame-shaped support frame 5 and an integrally formed support leg 6 at the bottom of the support frame 5. The support leg 6 is positioned on the test bench 1 by bolts. The support frame 5 has bolt holes 51 corresponding to the mounting holes of the powertrain 100. The bolts pass through the mounting holes of the powertrain 100 and the bolt holes 51 and are tightened to suspend the powertrain 100 on the suspension bracket 2. The bolt holes 51 on the support frame are connected to the mounting holes of the powertrain 100 with bolts, suspending the powertrain 100 on the suspension bracket 2. The support leg 5 is positioned on the test bench 1, and the suspension bracket 2 is positioned on the test bench 1. After the two suspension brackets 2 are positioned on the test bench 1, the chain 4 is engaged with the chain 1 and the chain 1 is connected. The chain 4 drives the two chain 1 to move synchronously, forming a drag test of the two powertrains 100.

[0016] The suspension bracket 2 has two support legs 6, each with two positioning blocks 7. The four positioning blocks 7 on the suspension bracket 2 are arranged in a rectangle. Two position adjustment holes 8 are provided on the test bench 1, which are located along the direction of the two suspension brackets. The positioning blocks 7 are positioned in the position adjustment holes 8 by bolts. The installation position of the suspension bracket 2 on the test bench 1 is adjusted as the positioning blocks 7 move along the position adjustment holes 8. When the bolts on the positioning blocks 7 are not tightened, the positioning blocks 7 can move along the position adjustment holes 8 to adjust the distance between the two suspension brackets 2, that is, to adjust the distance between the two powertrains 100, so as to adapt to the drag test of powertrains of different specifications and improve versatility. After adjustment, the bolts on the positioning blocks 7 are tightened to position the suspension bracket 2 on the test bench 1. Example 2

[0017] The difference from Embodiment 1 is that at least one suspension bracket 2 is equipped with a tensioning wheel 9 for tensioning the chain, and the tensioning wheel 9 meshes with the chain 4. As shown in the figure, a tensioning wheel 9 is installed on a suspension bracket 2, and the chain 4 is tensioned by the tensioning wheel 9 to ensure the reliability of the chain drive, thereby improving the reliability of the drag test.

[0018] The suspension bracket 2 has a tension wheel mounting hole 21 for mounting the tension wheel 9. The tension wheel mounting hole 21 is a vertically oriented strip hole, and the axle of the tension wheel 9 is positioned in the tension wheel mounting hole 21 by bolts. During installation, the axle of the tension wheel 9 is inserted into the tension wheel mounting hole 21 and secured with bolts to form a fixed position. Moving the axle of the tension wheel 9 along the tension wheel mounting hole 21 can adjust the installation position of the tension wheel 9 on the suspension bracket 2. When the chain 4 is slack and not tensioned, adjusting the position of the tension wheel 9 ensures that the chain 4 is effectively tensioned, improving the reliability of the chain drive.

[0019] The technical solutions of the embodiments of this utility model have been fully described above with reference to the accompanying drawings. It should be noted that the described embodiments are only a part of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

Claims

1. A test bench for chain-driven powertrain paired-track systems, comprising a test bench, characterized in that: It also includes a suspension bracket mounted on the test bench for suspending the powertrain, a chain sprocket mounted on the input shaft of the powertrain, and a chain meshing with the chain sprocket. There are two suspension brackets, with one powertrain suspended on each bracket. The chain sprockets on the two powertrains are connected by a chain to form a transmission connection. The installation position of the suspension bracket on the test bench is adjustable.

2. The chain drive powertrain test bench according to claim 1, characterized in that: The suspension bracket includes a frame-shaped support frame and a support leg integrally formed at the bottom of the support frame. The support leg is positioned on the test bench by bolts. Bolt holes corresponding to the mounting holes of the powertrain are opened on the support frame. The bolts pass through the mounting holes of the powertrain and the bolt holes and are tightened to suspend the powertrain on the suspension bracket.

3. The chain drive powertrain test bench according to claim 2, characterized in that: The suspension bracket has two support legs, each with two positioning blocks. The four positioning blocks on the suspension bracket are arranged in a rectangular shape. Two position adjustment holes are opened on the test platform, along the direction of the two suspension brackets. The positioning blocks are positioned in the position adjustment holes by bolts. The installation position of the suspension bracket on the test platform is adjusted as the positioning blocks move along the position adjustment holes.

4. The chain drive powertrain test bench according to claim 1, characterized in that: At least one suspension bracket is equipped with a tension wheel for tensioning the chain, the tension wheel engaging with the chain.

5. The chain drive powertrain test bench according to claim 4, characterized in that: The suspension bracket has a tensioning wheel mounting hole for mounting the tensioning wheel. The tensioning wheel mounting hole is a strip-shaped hole opened vertically, and the wheel axle of the tensioning wheel is positioned in the tensioning wheel mounting hole by bolts.

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