Transmission and motor integrated power assembly starting torque testing device

Abstract

The utility model discloses a transmission and motor integrated power assembly starting torque testing device comprising a transmission part which is coaxially arranged with an input shaft of a transmission and motor integrated power assembly and is fixedly connected along the circumferential direction, and the other end of the transmission part is connected with a torque testing part. And the test end of the torsion test part is perpendicular to the transmission part. According to the utility model, the starting torque of the transmission and motor integrated power assembly can be measured without using a test bench, the structure is simple and reliable, and the operation is convenient, so that power assembly defective products with abnormal internal resistance caused by factors such as assembly and part quality are eliminated.

Description

Technical Field

[0001] The utility model relates to the technical field of transmission and motor integrated power assembly testing, in particular to a transmission and motor integrated power assembly starting torque testing device. Background Art

[0002] Starting torque is an important performance indicator for evaluating the integrated transmission and motor powertrain. It is mainly caused by the transmission motor overcoming the friction loss during gear meshing, including friction loss during gear and bearing meshing, oil stirring loss of gears and bearings, etc. The input shaft of the integrated transmission and motor powertrain is provided with an external spline for connection, and an oil seal is provided on the input shaft to seal the transmission case. Normally, starting torque is tested on a dedicated test bench, but test benches are generally expensive and have tight schedules. In addition, the range of torque sensors is mostly above 1000Nm, and there is usually only a 10Nm test requirement for starting torque. Too large a range will directly affect the test results. Utility Model Content

[0003] The purpose of the utility model is to propose a transmission and motor integrated powertrain starting torque testing device to address the deficiencies in the prior art. The starting torque of the transmission and motor integrated powertrain can be measured without using a test bench. The structure is simple and reliable, and the operation is convenient, thereby eliminating defective powertrain products with abnormal internal resistance caused by factors such as assembly and component quality.

[0004] The technical solution to achieve the purpose of this utility model is:

[0005] A starting torque testing device for a transmission and motor integrated powertrain comprises a transmission part coaxially arranged with an input shaft of the transmission and motor integrated powertrain and fixedly connected in the circumferential direction, the other end of the transmission part is connected with a torque testing part, and the testing end of the torque testing part is arranged perpendicular to the transmission part.

[0006] Furthermore, the transmission part includes a transmission connecting shaft and a powertrain connecting shaft and a test end connecting shaft which are integrally formed and coaxially arranged at both ends of the transmission connecting shaft. The powertrain connecting shaft is a hollow structure and is circumferentially fixedly sleeved on the input shaft of the integrated powertrain of the transmission and the motor. The test end of the torque testing part is fixedly connected with a sleeve, and the sleeve is circumferentially fixedly sleeved on the test end connecting shaft.

[0007] Furthermore, the inner hole of the powertrain connecting shaft is provided with an internal spline adapted to the input shaft of the transmission and motor integrated powertrain.

[0008] Furthermore, the front end outer peripheral surface of the powertrain connecting shaft is provided with an inwardly recessed annular limit platform, and the annular limit platform is adapted to the oil seal on the input shaft of the transmission and motor integrated powertrain.

[0009] Furthermore, the front end outer ring of the annular limiting platform is provided with a chamfer.

[0010] Furthermore, the hardness of the inner spline is smaller than the hardness of the outer spline of the input shaft of the transmission and motor integrated power assembly.

[0011] Furthermore, a flange bolt is provided at the end of the test end connecting shaft, and a connecting hole matched with the flange bolt is provided at the sleeve.

[0012] Furthermore, the outer peripheral surface of the bottom of the connecting hole is chamfered.

[0013] Furthermore, the torque testing unit is a digital torque wrench with a measuring range of less than 100 Nm.

[0014] By adopting the above technical solution, the utility model has the following beneficial effects:

[0015] (1) The utility model drives the input shaft of the transmission and motor integrated power assembly through the transmission part by rotating the torque test part perpendicular to the transmission part in the circumferential direction, thereby realizing the measurement of the starting torque of the transmission and motor integrated power assembly without using a test bench. The overall structure is simple and reliable, and the operation is convenient, thereby eliminating defective power assembly products with abnormal internal resistance caused by factors such as assembly and parts quality.

[0016] (2) The transmission part of the utility model is an integrated structure, which reduces processing costs and improves the overall structural strength. The torque test part and the transmission part respectively use a sleeve and a hollow structure of the powertrain connecting shaft sleeve on the input shaft and the test end connecting shaft, which simplifies the connection method and facilitates the test operation.

[0017] (3) The powertrain connecting shaft of the utility model is circumferentially fixed to the input shaft by means of a spline connection, and has a simple structure, uniform connection force, and high coaxiality after connection, thereby improving the accuracy of the starting torque test.

[0018] (4) The utility model provides an annular limit platform so that the oil seal on the input shaft can be pressed tightly to avoid oil leakage during testing.

[0019] (5) The annular limit platform of the utility model is provided with chamfers to prevent sharp right-angle edges from scratching the oil seal.

[0020] (6) The hardness of the internal spline of the utility model is less than the hardness of the external spline of the input shaft of the transmission and motor integrated power assembly, thereby ensuring that the input shaft is not damaged when rotating.

[0021] (7) The utility model realizes circumferential fixed connection by providing flange surface bolts and connection holes that cooperate with each other, and has a simple structure and convenient connection.

[0022] (8) The torque test unit of the utility model adopts a digital torque wrench with a measuring range of less than 100 Nm, which facilitates testing while ensuring test accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to make the content of the utility model easier to understand, the utility model is further described in detail below according to specific embodiments and in conjunction with the accompanying drawings, wherein:

[0024] Figure 1 It is a structural schematic diagram of the welding gun device of the utility model;

[0025] Figure 2 This is a structural schematic diagram of the weld sensor of the utility model.

[0026] The reference numerals in the accompanying drawings are:

[0027] Transmission part 1, transmission connecting shaft 1-1, powertrain connecting shaft 1-2, internal spline 1-2-1, annular limit platform 1-2-2, test end connecting shaft 1-3, flange surface bolt 1-3-1, torque testing part 2. DETAILED DESCRIPTION

[0028] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0029] (Example 1)

[0030] like Figure 1 to Figure 2 The transmission and motor integrated powertrain starting torque test device shown comprises a transmission part 1 and a torque test part 2, wherein one end of the transmission part 1 is coaxially arranged with the input shaft of the transmission and motor integrated powertrain and fixedly connected in the circumferential direction, and the other end is vertically connected with the test end of the torque test part 2. By rotating the test end 2 of the vertical torque test part in the circumferential direction, the input shaft of the transmission and motor integrated powertrain is driven through the transmission part 1, thereby realizing the measurement of the starting torque of the transmission and motor integrated powertrain without using a test bench, and the overall structure is simple and reliable, and the operation is convenient, thereby eliminating defective powertrain products with abnormal internal resistance caused by factors such as assembly and parts quality.

[0031] Specifically, the transmission part 1 includes a transmission connecting shaft 1-1 and a powertrain connecting shaft 1-2 and a test end connecting shaft 1-3 which are integrally formed and coaxially arranged at both ends of the transmission connecting shaft 1-1, wherein the powertrain connecting shaft 1-1 is a hollow structure and is circumferentially fixedly sleeved on the input shaft of the transmission and motor integrated powertrain. The torque test part 2 is a digital torque wrench, which is easy to use and has low cost. Considering the test accuracy, the range of the digital torque wrench of this embodiment is 100Nm, which is convenient for accurately displaying the value of the starting torque.

[0032] The inner hole of the powertrain connecting shaft 1-2 is provided with an inner spline 1-2-1 adapted to the input shaft of the transmission and motor integrated powertrain. The transmission part 1 and the input shaft are fixed circumferentially by spline connection. The structure is simple, the connection force is uniform, and the coaxiality is high after connection, which improves the accuracy of the starting torque test. The test end of the digital torque wrench is fixedly connected with a sleeve 3, and the end of the test end connecting shaft 1-3 is provided with a flange face bolt 1-3-1. The sleeve 3 is provided with a connecting hole adapted to the flange face bolt 1-3-1. The sleeve 3 is fixedly sleeved on the test end connecting shaft 1-3 along the circumferential direction through the cooperation of the connecting hole and the flange face bolt 1-3-1. The entire transmission part 1 is an integrated structure, which reduces the processing cost and improves the overall structural strength. The torque test part 2 and the transmission part 1 respectively use the sleeve 3 and the hollow structure of the powertrain connecting shaft 1-1 to be sleeved on the input shaft and the test end connecting shaft 1-3, simplifying the connection method and facilitating the test operation.

[0033] The front end outer circumference of the powertrain connecting shaft 1-2 is provided with an annular limit platform 1-2-2 that is recessed inward and matched with the oil seal on the input shaft, so that it can press the oil seal on the input shaft tightly to avoid oil leakage during testing. The front end outer ring of the annular limit platform 1-2-2 is chamfered to prevent sharp right-angle edges from scratching the oil seal. At the same time, the hardness of the internal spline is less than the hardness of the external spline of the input shaft of the transmission and motor integrated powertrain, thereby ensuring that the input shaft is not damaged when measuring the starting torque to rotate the input shaft. In addition, the bottom outer circumference of the connecting hole is also chamfered to facilitate the flange face bolt 1-3-1 to be quickly and accurately inserted into the sleeve 3, simplifying the measurement and assembly operations.

[0034] In this embodiment, the torque testing part 2 is rotated circumferentially perpendicular to the transmission part 1, and the input shaft of the transmission and motor integrated power assembly is driven through the transmission part 1, so that the starting torque of the transmission and motor integrated power assembly can be measured without using a test bench. The overall structure is simple and reliable, and the operation is convenient, thereby eliminating defective power assembly products with abnormal internal resistance caused by factors such as assembly and component quality.

[0035] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A transmission and motor integrated powertrain starting torque test device, characterized in that: It includes a transmission part which is coaxially arranged with the input shaft of the transmission and motor integrated powertrain and fixedly connected along the circumferential direction, the other end of the transmission part is connected with a torque testing part, the test end of the torque testing part is arranged perpendicular to the transmission part, the transmission part includes a transmission connecting shaft and a powertrain connecting shaft and a test end connecting shaft which are integrally formed and coaxially arranged at both ends of the transmission connecting shaft, the powertrain connecting shaft is a hollow structure and is fixedly sleeved on the input shaft of the transmission and motor integrated powertrain along the circumferential direction, the test end of the torque testing part is fixedly connected with a sleeve, and the sleeve is fixedly sleeved on the test end connecting shaft along the circumferential direction.

2. A transmission and motor integrated powertrain starting torque test device according to claim 1, characterized in that: The inner hole of the powertrain connecting shaft is provided with an inner spline matched with the input shaft of the transmission and motor integrated powertrain.

3. A transmission and motor integrated powertrain starting torque test device according to claim 2, characterized in that: The front end outer peripheral surface of the power assembly connecting shaft is provided with an inwardly recessed annular limiting platform, and the annular limiting platform is adapted to the oil seal on the input shaft of the transmission and motor integrated power assembly.

4. A transmission and motor integrated powertrain starting torque test device according to claim 3, characterized in that: The front end outer ring of the annular limiting platform is provided with a chamfer.

5. The transmission and motor integrated powertrain starting torque test device according to claim 2, characterized in that: The hardness of the internal spline is less than the hardness of the external spline of the input shaft of the transmission and motor integrated power assembly.

6. The transmission and motor integrated powertrain starting torque test device according to claim 1, characterized in that: The end of the test end connecting shaft is provided with a flange face bolt, and the sleeve is provided with a connecting hole matched with the flange face bolt.

7. A transmission and motor integrated powertrain starting torque test device according to claim 6, characterized in that: The outer peripheral surface of the bottom of the connecting hole is chamfered.

8. The transmission and motor integrated powertrain starting torque test device according to claim 1, characterized in that: The torque testing unit is a digital torque wrench with a measuring range of less than 100 Nm.

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