Connecting tool for calibrating transmission shaft surface patch type torque sensor

Abstract

The utility model discloses a connecting tool for calibrating a transmission shaft surface patch type torque sensor. The connecting tool is composed of a connecting disc and a spline shaft which are coaxially fixed together. The spline shaft is used for being connected with a durable rack. The connecting disc is fixed with the transmission shaft connecting end. And a cylindrical part and arc transition are reserved between the spline shaft and the connecting disc to reduce stress concentration. An inserting groove and a limiting pin groove are reserved in the connecting end of the connecting disc and the transmission shaft. The inserting grooves guarantee longitudinal connection of the connecting disc and prevent longitudinal dislocation, and the limiting pin grooves play a transverse fixing role and prevent the connecting disc from being disengaged transversely. The torsion bar durable rack is suitable for connecting a traditional transmission shaft torque sensor calibration testing machine with a special design tool when a torsion bar durable rack can be used for torque sensor calibration on a long transmission shaft due to the fact that a sample is too long and the space size is not enough.

Description

Technical Field

[0001] This utility model belongs to the field of sensor calibration technology, and relates to a connection fixture for calibrating a surface-mount torque sensor on a drive shaft. Specifically, it relates to a connection fixture for calibrating a surface-mount torque sensor on a drive shaft using a torsion bar durability test bench. Background Technology

[0002] Traditional calibration testing machines have limited space, making them unsuitable for calibrating long shaft parts. Torsion bar durability test benches are specialized machines with flexible, adjustable positions at one end, allowing them to be used on shaft parts of varying lengths and to apply loads. However, the connection between the machine and the part is custom-designed. For calibration parts, specialized connecting fixtures need to be redesigned based on the part's size and shape. Furthermore, traditional connecting fixtures are often multi-hole connecting discs secured with bolts. In practice, due to machining errors, it's difficult to ensure hole alignment during installation and disassembly, posing challenges to bolt installation and removal. Utility Model Content

[0003] This invention provides a connection fixture for calibrating a surface-mount torque sensor on a drive shaft, thus solving the aforementioned problems.

[0004] To solve the above technical problems, this utility model provides a connection fixture for calibrating a surface-mount torque sensor on a drive shaft. The fixture is characterized by being composed of a connecting disc and a splined shaft that are coaxially fixed together, with the connecting disc used for fixed connection to the drive shaft.

[0005] Beneficial effects: Based on the size and shape requirements of the connection, this utility model adopts a 12-outer spline connection at the connection end with the durable frame, and a connecting plate with a plug groove and a limiting pin at the connection end with the drive shaft. The plug groove ensures the longitudinal connection of the connecting plate and prevents longitudinal misalignment, while the limiting pin restricts the lateral disengagement of the connecting plate. A cylindrical part and an arc transition are left between the external spline and the connecting plate to reduce stress concentration.

[0006] It has the advantages of simple structure, easy mounting and disassembly, and is suitable for the connection of surface-mount torque sensors for calibration of specific shaft parts.

[0007] For torque sensor calibration testing machines suitable for traditional drive shafts, when the sample is too long and the space is insufficient, a torsion bar durability test bench can be used to calibrate the torque sensor on a longer drive shaft. This specially designed fixture is used for connection. Attached Figure Description

[0008] Figure 1 This is the front view of the tooling;

[0009] Figure 2 This is the left view of the tooling;

[0010] Figure 3 This is a top view of the tooling;

[0011] In the diagram, 1 is the connecting plate, 2 is the spline shaft, 3 is the limiting pin hole, and 4 is the insertion slot. Detailed Implementation

[0012] To make the purpose, content and advantages of this utility model clearer, the specific embodiments of this utility model will be described in further detail below.

[0013] This utility model proposes a connecting fixture for calibrating a surface-mount torque sensor on a drive shaft, which consists of a connecting disc and a splined shaft fixed together on the same axis.

[0014] The splined shaft is used to connect to the durability test bench and has 12 external splines.

[0015] The connecting plate and the drive shaft are fixed by eight Φ12mm fastening holes.

[0016] A cylindrical section and a rounded transition are left between the spline shaft and the connecting plate to reduce stress concentration.

[0017] The connecting plate and the drive shaft connection end are provided with a plug groove and a limiting pin groove. There are multiple plug grooves, and a through limiting pin groove is provided perpendicular to the plug groove direction and passes through the shaft center. The plug groove ensures the longitudinal connection of the connecting plate and prevents longitudinal misalignment, while the limiting pin groove plays a lateral fixing role and prevents the connecting plate from coming off laterally.

[0018] The insertion slot has a dovetail groove structure.

[0019] The material used is ordinary carbon steel, and the heat treatment process is quenching and tempering.

[0020] This connecting fixture is used to connect the drive shaft to the torsion bar durability test bench, thereby facilitating the calibration of the drive shaft.

[0021] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A connection fixture for calibrating a surface-mount torque sensor on a drive shaft, characterized in that: It consists of a connecting plate and a splined shaft that are coaxially fixed together. The connecting plate is used to fix the drive shaft; the splined shaft is used to connect the durable test bench; the splined shaft is designed with multiple external splines; there is a cylindrical part and a rounded transition between the splined shaft and the connecting plate.

2. The connection fixture for calibrating a surface-mount torque sensor on a drive shaft according to claim 1, characterized in that: The connecting plate and the drive shaft are fixed by the reserved fastening mounting holes.

3. The connection fixture for calibrating a surface-mount torque sensor on a drive shaft according to claim 1, characterized in that: The connecting plate and the drive shaft are provided with a plug groove and a limit pin groove.

4. The connection fixture for calibrating a surface-mount torque sensor on a drive shaft according to claim 3, characterized in that: There are multiple insertion slots.

5. The connection fixture for calibrating a surface-mount torque sensor on a drive shaft according to claim 4, characterized in that: The insertion slot has a dovetail groove structure.

6. The connection fixture for calibrating a surface-mount torque sensor on a drive shaft according to claim 1, characterized in that: The direction of the limiting pin groove is perpendicular to the direction of the insertion groove.

7. The connection fixture for calibrating a surface-mount torque sensor on a drive shaft according to claim 6, characterized in that: The limiting pin groove passes through the axis of the connecting plate end face and is a through groove.

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