Power takeoff fatigue life test device

Abstract

The utility model relates to the technical field of transmission performance testing, in particular to a power takeoff fatigue life testing device which comprises a loading motor, an auxiliary testing transmission and a driving motor which are arranged on a testing plane. The output end of a loading motor is connected with the input end of an auxiliary test transmission; the output end of the auxiliary test transmission is connected with the input end of the power takeoff to be tested; and connecting the output end of the power takeoff to be tested with a driving motor. The auxiliary test transmission is connected with the output end of the loading motor to realize power input, and the output end of the to-be-tested power takeoff is connected with the output end of the driving motor to realize power output, so that the rated torque of the to-be-tested power takeoff is smaller than the maximum torque output capacity of the driving motor, and the fatigue test of the power takeoff is realized. And the installation is reliable, and the transformation cost is low. The problem that the power takeoff fatigue test cannot meet the test requirement due to the fact that the torque of the driving motor is smaller than the transmission requirement is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of transmission performance testing, in particular to a fatigue life testing device for a power take-off. Background Art

[0002] The bench test of the power take-off is an important part of product research and development. Through bench testing, we can understand the performance and reliability of the power take-off and provide important data support for designers.

[0003] At present, the traditional power take-off fatigue life test device installs the power take-off on the transmission, the transmission is connected to the test bench drive motor, and the power take-off is connected to the test bench loading motor through a transmission shaft. In the power take-off fatigue life test, this connection method often calculates the transmission required torque based on the speed ratio and efficiency loss, which is greater than the maximum torque capacity of the test bench drive end motor, thus failing to meet the test project requirements. Utility Model Content

[0004] Aiming at the problem in the prior art that a fatigue test device for a power take-off cannot meet the test requirements because the torque of a driving motor is less than the requirement of a transmission, the utility model provides a fatigue life test device for a power take-off.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A power take-off fatigue life test device comprises a loading motor, an auxiliary test transmission and a driving motor arranged on a test plane;

[0007] The output end of the loading motor is connected to the input end of the auxiliary test transmission;

[0008] The output end of the auxiliary test transmission is connected to the input end of the power take-off to be tested;

[0009] The output end of the power take-off to be tested is connected to a driving motor.

[0010] Furthermore, the input end of the auxiliary test transmission is connected to the output end of the loading motor through a transmission input drive shaft.

[0011] Furthermore, the input end of the auxiliary test transmission is connected to the transmission input drive shaft via a shaft adapter.

[0012] Furthermore, it also includes a transmission bracket, which is fixedly connected to the auxiliary test transmission housing and is used to support, fix and limit the auxiliary test transmission.

[0013] Furthermore, a base is provided at the bottom of the transmission bracket.

[0014] Furthermore, the base is fixedly connected to the test plane by bolts.

[0015] Furthermore, the shaft adapter is fixedly connected to the transmission bracket by screws.

[0016] Furthermore, a power take-off output transmission shaft is provided between the drive motor and the power take-off to be tested.

[0017] Furthermore, a transition flange is provided on the power take-off to be tested, and the output transmission shaft of the power take-off passes through the transition flange and is connected to the output end of the power take-off to be tested.

[0018] Furthermore, the output end speed of the power take-off to be tested / the input end speed of the auxiliary test transmission=1.39.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] The utility model discloses a fatigue life test device for a power take-off, comprising a loading motor, an auxiliary test transmission and a driving motor arranged on a test plane; the output end of the loading motor is connected to the input end of the auxiliary test transmission; the output end of the auxiliary test transmission is connected to the input end of the power take-off to be tested; and the output end of the power take-off to be tested is connected to the driving motor. The auxiliary test transmission is connected to the output end of the loading motor to realize power input, and the output end of the power take-off to be tested is connected to the output end of the driving motor to realize power output, so that the rated torque of the power take-off to be tested is less than the maximum torque output capacity of the driving motor, thereby realizing fatigue testing of the power take-off, solving the problem in the prior art that the power output of the driving motor cannot meet the test requirements, ensuring the smooth progress of the test project, reliable installation, and low transformation cost.

[0021] The setting of the transmission input transmission shaft realizes the connection between the input end of the auxiliary test transmission and the output end of the loading motor.

[0022] The provision of the shaft adapter realizes the connection between the input end of the auxiliary test transmission and the transmission input drive shaft.

[0023] The setting of the transmission bracket realizes the support, fixation and limitation of the auxiliary test transmission.

[0024] The setting of the base improves the stability of the bracket.

[0025] The base is fixedly connected to the test plane by bolts, which is convenient for disassembly and installation.

[0026] The shaft adapter is fixedly connected to the transmission bracket by screws, thereby improving the stability of the connection.

[0027] The setting of the power take-off output transmission shaft realizes the connection between the drive motor and the power take-off to be tested.

[0028] Appropriate speed ratio is conducive to the smooth progress of fatigue test and ensures the reliability of test results BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 The utility model is a schematic diagram of a fatigue life test device for a power take-off.

[0030] Figure 2 This is a structural diagram of a shaft adapter of a power take-off fatigue life test device of the utility model, wherein a is a left view of the shaft adapter and b is a cross-sectional view of the shaft adapter.

[0031] Figure 3 This is a structural diagram of a transmission bracket of a power take-off fatigue life test device of the utility model, wherein a is a cross-sectional view of the transmission bracket and b is a left view of the transmission bracket.

[0032] Figure 4 This is a base structure diagram of a power take-off fatigue life test device of the utility model, wherein a is a front view of the base and b is a top view of the base.

[0033] Figure 5 This is a structural diagram of a transition flange of a power take-off fatigue life test device of the utility model, wherein a is a left view of the transition flange and b is a cross-sectional view of the transition flange.

[0034] Among them, 1- loading motor, 2- transmission input drive shaft, 3- shaft adapter, 4- transmission bracket, 5- base, 6- auxiliary test transmission, 7- power take-off to be tested, 8- transition flange, 9- power take-off output drive shaft, 10- driving motor. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0038] In the description of the embodiments of the present utility model, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use, it is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply 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 on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0039] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0040] In the description of the embodiments of the present utility model, 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 utility model can be understood according to specific circumstances.

[0041] The present invention will be further described in detail below in conjunction with specific embodiments, which are intended to explain the present invention rather than to limit it.

[0042] Taking the maximum torque of the drive motor 10 as 720Nm, the rated torque of the power take-off to be tested as 650Nm, and the required torque converted to 950Nm at the input end of the transmission when using the fatigue testing equipment in the prior art, it is obvious that the fatigue testing equipment in the prior art cannot meet the testing requirements.

[0043] See also Figure 1 , the utility model provides a fatigue life test device for a power take-off, comprising a loading motor 1, an auxiliary test transmission 6 and a driving motor 10 arranged on a test plane;

[0044] The output end of the loading motor 1 is connected to the input end of the auxiliary test transmission 6, preferably, see Figure 2The input end of the auxiliary test transmission 6 is connected to the output end of the loading motor 1 through the transmission input drive shaft 2 and the shaft adapter 3.

[0045] See also Figure 3 and Figure 4 The auxiliary test transmission 6 housing is provided with a transmission bracket 4 for supporting, fixing and limiting the auxiliary test transmission 6; the shaft adapter 3 is fixedly connected to the transmission bracket 4 by screws, and a base 5 is provided at the bottom of the transmission bracket 4; the base 5 is fixedly connected to the test plane by bolts; the output end of the auxiliary test transmission 6 is connected to the input end of the power take-off 7 to be tested;

[0046] See also Figure 5 The output end of the power take-off 7 to be tested is connected to the drive motor 10 through the power take-off output transmission shaft 9. A transition flange 8 is provided on the power take-off 7 to be tested. The power take-off output transmission shaft 9 passes through the transition flange 8 and is connected to the output end of the power take-off 7 to be tested.

[0047] Preferably, the output end speed of the power take-off 7 to be tested / the input end speed of the auxiliary test transmission 6 = 1.39.

[0048] During installation, the output end of the loading motor 1 is connected to the transmission input drive shaft 2, the shaft adapter 3, the auxiliary test transmission 6, the power take-off 7, the power take-off output drive shaft 9 and the drive motor 10 in sequence to complete the construction of the power take-off fatigue test device.

[0049] When in use, first give the loading motor 1 a low speed, determine that the rotation direction of the input shaft of the auxiliary test transmission 6 is clockwise facing the auxiliary test transmission 6 housing, that is, positive, and the torque direction of the auxiliary test transmission 6 is positive torque, that is, the torque of the input shaft of the auxiliary test transmission 6 rotating forward is positive torque; according to the input shaft speed and torque direction of the auxiliary test transmission 6, set the speed and torque direction of the output end of the power take-off 7 to be tested, ensure that the engine end is in forward rotation and positive drive, and make the speed ratio from the input shaft of the auxiliary test transmission 6 to the output end of the power take-off 7 to be tested 0.72, so that the test bench sets the speed ratio = the output end speed of the power take-off 7 to be tested / the input shaft speed of the auxiliary test transmission 6 = 1 / 0.72 = 1.39, and perform the fatigue life test of the power take-off. In this way, the auxiliary test transmission 6 is connected to the output end of the loading motor 1 to realize power input, and the output end of the power take-off 6 to be tested is connected to the input end of the drive motor 10 to realize power output. The rated torque of the power take-off to be tested is 650Nm, which is less than the maximum torque capacity of the drive motor 10 of 720Nm, thereby meeting the fatigue test requirements of the power take-off and solving the problem in the prior art that the power output of the drive motor 10 cannot meet the test requirements, ensuring the smooth progress of the test project, reliable installation and low modification cost.

[0050] To sum up, the utility model provides a power take-off fatigue life test device. By changing the installation position and connection relationship between the drive motor 10 and the loading motor 1 and the auxiliary test transmission 6, the maximum torque output capacity of the drive motor 10 is made greater than the rated torque of the power take-off 7 to be tested, thereby meeting the needs of fatigue testing of the power take-off 7 to be tested, avoiding the problem of insufficient capacity of the drive motor 10, and having reliable installation and low modification cost, and can provide reference for other test benches.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to impose any limitation on the technical solution of the present invention. Those skilled in the art should understand that, without departing from the spirit and principles of the present invention, the technical solution can also be subjected to several simple modifications and replacements, and these modifications and replacements are also within the scope of protection covered by the claims.

Claims

1. A power take-off fatigue life test device, characterized in that: It comprises a loading motor (1), an auxiliary test transmission (6) and a driving motor (10) arranged on a test plane; The output end of the loading motor (1) is connected to the input end of the auxiliary test transmission (6); The output end of the auxiliary test transmission (6) is connected to the input end of the power take-off (7) to be tested; The output end of the power take-off (7) to be tested is connected to a drive motor (10).

2. The power take-off fatigue life test device according to claim 1, characterized in that: The input end of the auxiliary test transmission (6) is connected to the output end of the loading motor (1) via the transmission input drive shaft (2).

3. The power take-off fatigue life test device according to claim 2, characterized in that: The input end of the auxiliary test transmission (6) is connected to the transmission input drive shaft (2) via a shaft adapter (3).

4. The power take-off fatigue life test device according to claim 3, characterized in that: It also includes a transmission bracket (4), which is fixedly connected to the housing of the auxiliary test transmission (6) and is used to support, fix and limit the auxiliary test transmission (6).

5. The power take-off fatigue life test device according to claim 4, characterized in that: A base (5) is provided at the bottom of the transmission bracket (4).

6. The power take-off fatigue life test device according to claim 5, characterized in that: The base (5) is fixedly connected to the test plane via bolts.

7. The power take-off fatigue life test device according to any one of claims 4 to 6, characterized in that: The shaft adapter (3) is fixedly connected to the transmission bracket (4) via screws.

8. The power take-off fatigue life test device according to claim 1, characterized in that: A power take-off output transmission shaft (9) is provided between the driving motor (10) and the power take-off (7) to be tested.

9. The power take-off fatigue life test device according to claim 8, characterized in that: The power take-off (7) to be tested is provided with a transition flange (8), and the power take-off output transmission shaft (9) passes through the transition flange (8) and is connected to the output end of the power take-off (7) to be tested.

10. The power take-off fatigue life test device according to claim 1, characterized in that: The output end speed of the power take-off (7) to be tested / the input end speed of the auxiliary test transmission (6)=1.39.

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