Input shaft series system performance testing device and method

Abstract

The present invention discloses an input shaft string system performance test device and method, which belongs to the technical field of vehicle performance test, wherein the base comprises a first mounting plate and a second mounting plate arranged opposite to each other, wherein the first mounting plate has a first through hole, and the second mounting plate has a second through hole; the preload assembly comprises a front adjustment nut installed in the first through hole and a rear adjustment nut installed in the second through hole, wherein the front adjustment nut is used to fix the other end of the input shaft, and the rear adjustment nut is used to fix the inter-axle differential assembly; the end support assembly is used to support the inter-axle differential assembly; the torque output assembly is rotatably mounted on the first mounting plate and the second mounting plate; and the displacement detection assembly is used to detect the displacement of the cylindrical gear pair and / or the inter-axle differential assembly in a preset direction. The present invention facilitates obtaining the state and performance level of the input shaft string system, and can improve the progress of product development and the efficiency of problem solving.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle performance testing, and in particular to an input shaft series system performance testing device and method. Background Art

[0002] In the vehicle field, the input shaft string system that runs through the middle bridge is the key mechanism to realize the two-stage transmission of the double-bridge. Especially for medium and heavy-duty trucks, the performance of the input shaft string system directly affects the performance of the medium and heavy-duty trucks.

[0003] The current mainstream input shaft string system type in the market usually includes an input shaft, a primary transmission mechanism cylindrical gear pair and accessories, and an inter-axle differential assembly. Among them, the cylindrical gear is integrated with the front bevel gear of the inter-axle differential. The input shaft string system is popular because of its compact structure and reliable functions. In the prior art, auxiliary verification is usually carried out during the whole bridge test, and the performance of the input shaft string system cannot be directly tested, which makes it difficult to determine the status and performance level of the input shaft string system, seriously affecting the progress of product development and the efficiency of solving quality problems.

[0004] Therefore, there is an urgent need for an input shaft string system performance testing device and method for input shaft string system performance testing. Summary of the invention

[0005] The object of the present invention is to provide an input shaft string system performance testing device and method, which is convenient for obtaining the state and performance level of the input shaft string system, and can improve the progress of product development and the efficiency of problem solving.

[0006] As conceived above, the technical solution adopted by the present invention is:

[0007] An input shaft train system performance test device, the input shaft train system includes an input shaft, a cylindrical gear pair sleeved on the middle of the input shaft, and an inter-axle differential assembly installed on one end of the input shaft, the input shaft is connected to the first gear of the cylindrical gear pair, and the input shaft train system performance test device includes:

[0008] The base comprises a first mounting plate and a second mounting plate which are arranged opposite to each other, wherein the first mounting plate has a first through hole, and the second mounting plate has a second through hole;

[0009] A preload assembly, comprising a front adjusting nut installed in the first through hole and a rear adjusting nut installed in the second through hole, wherein the front adjusting nut is used to fix the other end of the input shaft, and the rear adjusting nut is used to fix the inter-axle differential assembly;

[0010] an end support assembly, used for supporting the inter-axle differential assembly;

[0011] A torque output assembly, rotatably mounted on the first mounting plate and the second mounting plate, and used to be connected to the second gear of the cylindrical gear pair;

[0012] The displacement detection component is used to detect the displacement of the cylindrical gear pair and / or the inter-axle differential assembly in a preset direction, wherein the preset direction is perpendicular to the arrangement direction of the first mounting plate and the second mounting plate.

[0013] Optionally, the end support assembly comprises a flange shaft, the axis of the flange shaft is colinear with the axis of the input shaft, and the flange shaft is inserted into the rear bevel gear of the inter-axle differential assembly.

[0014] Optionally, the torque output assembly includes an output shaft and an end cover fixed to one end of the output shaft, the output shaft is rotatably mounted on the first mounting plate and the second mounting plate, and the middle portion of the output shaft is used to pass through the second gear and connect to the second gear.

[0015] Optionally, it also includes a front bearing cover, a front bearing, a rear bearing cover and a rear bearing, the front bearing cover is fixedly mounted on the first mounting plate, the other end of the output shaft is rotatably mounted on the front bearing cover through the front bearing, the rear bearing cover is fixedly mounted on the second mounting plate, and the middle part of the output shaft is rotatably mounted on the rear bearing cover through the rear bearing.

[0016] Optionally, a front spacer is further included, wherein the front spacer is sleeved on the output shaft, and one end of the front spacer abuts against the front bearing, and the other end of the front spacer is used to abut against the second gear.

[0017] Optionally, a rear spacer is further included, wherein the rear spacer is sleeved on the output shaft, and one end of the rear spacer abuts against the rear bearing, and the other end of the rear spacer is used to abut against the second gear.

[0018] Optionally, the base further includes a bottom plate, the first mounting plate and the second mounting plate are respectively vertically connected to the bottom plate, and the first mounting plate and the second mounting plate are located on the same side of the bottom plate.

[0019] Optionally, the displacement detection component includes a first laser displacement meter and a second laser displacement meter, the first laser displacement meter is used to detect the displacement of the cylindrical gear pair in the preset direction, and the second laser displacement meter is used to detect the displacement of the inter-axle differential assembly in the preset direction.

[0020] Optionally, a temperature sensor is further included, and the temperature sensor is used to detect the temperature of the inter-axle differential assembly.

[0021] The input shaft string system performance test method is applied to the above-mentioned input shaft string system performance test device, comprising the following steps:

[0022] Fixing the other end of the input shaft to the first mounting plate via a front adjusting nut;

[0023] Fixing the inter-axle differential assembly to the second mounting plate via a rear adjusting nut;

[0024] supporting the inter-axle differential assembly via the end support assembly;

[0025] connecting the torque output assembly to a second gear of the cylindrical gear pair;

[0026] The displacement detection component is fixedly mounted on the cylindrical gear pair and / or the inter-axle differential assembly;

[0027] Inputting a preset rotation speed and a preset torque into the input shaft, and detecting the displacement of the cylindrical gear pair and / or the inter-axle differential assembly in a preset direction through the displacement detection component;

[0028] The performance level of the input shaft train system is determined by the displacement of the spur gear pair and / or the inter-axle differential assembly in a preset direction.

[0029] Optionally, determining the performance level of the input shaft train system by displacement of the cylindrical gear pair and / or the inter-axle differential assembly in a preset direction comprises the following steps:

[0030] Detecting a first displacement of the cylindrical gear pair in the preset direction;

[0031] detecting a second displacement of the inter-axle differential assembly in the preset direction;

[0032] Compare the relationship between the first displacement and the second displacement and the first preset displacement and the second preset displacement. When the first displacement and / or the second displacement is greater than the first preset displacement, it is determined that the performance level of the input shaft string system is poor; when the first displacement and the second displacement are both less than the second preset displacement, it is determined that the performance level of the input shaft string system is excellent; when the first displacement is less than or equal to the first preset displacement and greater than the second preset displacement, and the second displacement is less than or equal to the first preset displacement, or when the second displacement is less than or equal to the first preset displacement and greater than the second preset displacement, and the first displacement is less than or equal to the first preset displacement, it is determined that the performance level of the input shaft string system is good.

[0033] The input shaft string system performance testing device and method proposed in the present invention assemble the input shaft and the inter-axle differential assembly on a base through a preload component, and support the inter-axle differential assembly through an end support component. The torque output component is used to output the torque input by the input shaft, so as to realize the simulation of the actual working state of the input shaft string system. The displacement of the cylindrical gear pair and / or the inter-axle differential assembly in a preset direction is detected by the displacement detection component. The performance level of the input shaft string system can be further determined through analysis, thereby improving the product development progress and the efficiency of problem solving. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is a schematic diagram of the structure of an input shaft string system performance testing device provided by an embodiment of the present invention;

[0035] Figure 2 is a schematic structural diagram of an end support assembly provided by an embodiment of the present invention;

[0036] Figure 3 is a schematic structural diagram of a front adjusting nut provided in an embodiment of the present invention;

[0037] Figure 4 is a schematic structural diagram of a base provided by an embodiment of the present invention;

[0038] Figure 5 is a schematic structural diagram of a front spacer provided in an embodiment of the present invention;

[0039] Figure 6 is a schematic structural diagram of a front bearing cover provided by an embodiment of the present invention;

[0040] Figure 7 is a schematic structural diagram of an output shaft provided by an embodiment of the present invention;

[0041] Figure 8 is a schematic structural diagram of an input shaft string system provided by an embodiment of the present invention;

[0042] Fig. 9 It is a flow chart of the input shaft string system performance testing method provided by an embodiment of the present invention.

[0043] In the figure:

[0044] 1. base; 11. first mounting plate; 111. first through hole; 112. third through hole; 12. second mounting plate; 121. second through hole; 122. fourth through hole; 13. bottom plate;

[0045] 2. Preload assembly; 21. Front adjustment nut; 22. Rear adjustment nut;

[0046] 3. End support assembly; 31. Flange shaft;

[0047] 4. Torque output assembly; 41. Output shaft; 42. End cover;

[0048] 5. Front bearing cover; 6. Rear bearing cover; 7. Front spacer; 8. Rear spacer;

[0049] 101. input shaft; 102. cylindrical gear pair; 1021. first gear; 1022. second gear; 103. inter-axle differential assembly. DETAILED DESCRIPTION

[0050] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the present invention are further described below in conjunction with the accompanying drawings and through specific implementation methods. It is understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for the convenience of description, only the parts related to the present invention are shown in the accompanying drawings, not all.

[0051] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0053] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0054] Embodiment 1

[0055] This embodiment provides an input shaft string system performance testing device for testing the performance of the input shaft string, so as to obtain the state and performance level of the input shaft string system, thereby improving product development progress and problem-solving efficiency.

[0056] Figure 8 The structure of the input shaft system provided in this embodiment is integrated, wherein the input shaft system includes an input shaft 101, a cylindrical gear pair 102 sleeved in the middle of the input shaft 101, and an inter-axle differential assembly 103 installed at one end of the input shaft 101. Figure 8 In the embodiment, the inter-axle differential assembly 103 is installed at the right end of the input shaft 101. The cylindrical gear pair 102 includes a first gear 1021 and a second gear 1022 that are meshed with each other, the second gear 1022 is located below the first gear 1021, and the input shaft 101 is connected to the first gear 1021. Specifically, the middle portion of the input shaft 101 passes through the first gear 1021 and is fixedly connected to the first gear 1021, so that when the input shaft 101 rotates, it can drive the first gear 1021 to rotate.

[0057] like Figure 1 As shown, the input shaft string system performance testing device includes a base 1, a preload assembly 2, an end support assembly 3, a torque output assembly 4 and a displacement detection assembly (not shown).

[0058] The base 1 includes a first mounting plate 11 and a second mounting plate 12 that are arranged opposite to each other. In this embodiment, the first mounting plate 11 and the second mounting plate 12 are arranged parallel to each other. In addition, the first mounting plate 11 has a first through hole 111 and a third through hole 112 arranged vertically, and the second mounting plate 12 has a second through hole 121 and a fourth through hole 122 arranged vertically.

[0059] The preload assembly 2 is mounted on the base 1 through the first through hole 111 and the second through hole 121. Specifically, the preload assembly 2 includes a front adjustment nut 21 installed in the first through hole 111 and a rear adjustment nut 22 installed in the second through hole 121. The front adjustment nut 21 is used to fix the other end of the input shaft 101. Specifically, the front adjustment nut 21 is used to contact the input shaft bearing of the input shaft 101, and limit the input shaft 101 on the first mounting plate 11 by pressing against the input shaft bearing. The rear adjustment nut 22 is used to fix the inter-axle differential assembly 103. Specifically, the rear adjustment nut 22 contacts the rear cone bearing of the inter-axle differential assembly 103, and limits the inter-axle differential assembly 103 on the second mounting plate 12 by pressing against the rear cone bearing. In this embodiment, the input shaft string system with different sizes can be assembled by tightening, screwing in and out the front adjustment nut 21 and the rear adjustment nut 22, and the actual assembly state of the input shaft string system can be simulated to improve the accuracy of the test results.

[0060] The end support assembly 3 is used to support the inter-axle differential assembly 103. In some embodiments, the end support assembly 3 contacts the rear bevel gear of the inter-axle differential assembly 103 to achieve the differential state of the inter-axle differential assembly 103. Figure 1 The torque output assembly 4 is rotatably mounted on the first mounting plate 11 and the second mounting plate 12 , and the torque output assembly 4 is used to be connected to the second gear 1022 . Specifically, the torque output assembly 4 passes through the second gear 1022 and is fixedly connected to the second gear 1022 .

[0061] The displacement detection assembly in this embodiment is used to detect the displacement of the cylindrical gear pair 102 and / or the inter-axle differential assembly 103 in a preset direction, so as to determine the performance of the input shaft string system according to the displacement. The preset direction is perpendicular to the arrangement direction of the first mounting plate 11 and the second mounting plate 12, and more specifically, the preset direction is the arrangement direction of the first gear 1021 and the second gear 1022.

[0062] The input shaft string system performance testing device provided in this embodiment assembles the input shaft 101 and the inter-axle differential assembly 103 on the base 1 through the preload component 2, and supports the inter-axle differential assembly 103 through the end support component 3. The torque output component 4 is used to output the torque input by the input shaft 101, so as to realize the simulation of the actual working state of the input shaft string system. The displacement of the cylindrical gear pair 102 and / or the inter-axle differential assembly 103 in a preset direction is detected by the displacement detection component, and the performance level of the input shaft string system can be determined by further analysis, thereby improving the product development progress and the efficiency of solving problems.

[0063] The input shaft string system performance testing device provided in this embodiment can test the performance of the input shaft string system with a small number of components. The open testing space provided and the accurate simulation of the installation state of the input shaft string system make targeted performance testing possible.

[0064] Alternatively, if Figure 2 As shown, the end support assembly 3 includes a flange shaft 31, which is formed by fixing a flange plate and a shaft, and the axis of the flange shaft 31 is colinear with the axis of the input shaft 101, and the shaft of the flange shaft 31 is inserted into the rear bevel gear of the inter-axle differential assembly 103, and is arranged opposite to one end of the input shaft 101. In some embodiments, there is a gap between the end of the shaft and the end face of one end of the input shaft 101. By inserting the shaft of the flange shaft 31 into the rear bevel gear, the inter-axle differential assembly 103 is supported, and a differential state can also be achieved. The flange plate can be fixed on the base 1, such as indirectly fixed on the base 1.

[0065] Please continue to see Figure 1 and Figure 7The torque output assembly 4 includes an output shaft 41 and an end cover 42 fixed to one end of the output shaft 41. In this embodiment, the end cover 42 can be a flange. The output shaft 41 is rotatably mounted on the first mounting plate 11 and the second mounting plate 12. Specifically, the output shaft 41 is mounted in the third through hole 112 and the fourth through hole 122, and the middle part of the output shaft 41 passes through the second gear 1022 and is connected to the second gear 1022. When the input shaft 101 drives the first gear 1021 to rotate, the second gear 1022 meshing with the first gear 1021 rotates and drives the output shaft 41 to rotate to output torque outward. In this embodiment, the output shaft 41 can be connected to a torque testing device to test the transmission performance of the input shaft string system.

[0066] Furthermore, if Figure 1 and Figure 6 As shown, the input shaft series system performance test device also includes a front bearing cover 5, a front bearing installed in the front bearing cover 5, a rear bearing cover 6 and a rear bearing installed in the rear bearing cover 6. Among them, the front bearing cover 5 is fixedly installed on the first mounting plate 11, specifically installed on the third through hole 112, and the other end of the output shaft 41 is rotatably installed on the front bearing cover 5 through the front bearing, that is, the output shaft 41 can rotate relative to the front bearing cover 5. The rear bearing cover 6 is fixedly installed on the second mounting plate 12, specifically installed on the fourth through hole 122, and the middle part of the output shaft 41 is rotatably installed on the rear bearing cover 6 through the rear bearing, so that the output shaft 41 can rotate relative to the rear bearing cover 6. In this embodiment, Figure 1 As shown, the end cover 42 is located on the side of the rear bearing cover 6 away from the front bearing cover 5 .

[0067] In this embodiment, Figure 1 and Figure 5 As shown, the input shaft series system performance test device also includes a front spacer 7. The front spacer 7 is sleeved on the output shaft 41, and one end of the front spacer 7 abuts against the front bearing, and the other end of the front spacer 7 abuts against the second gear 1022. The front spacer 7 is used to ensure a fixed distance between the front bearing and the second gear 1022, so as to achieve lateral positioning of the second gear 1022.

[0068] Furthermore, the input shaft string system performance test device also includes a rear spacer 8, which is sleeved on the output shaft 41, and one end of the rear spacer 8 is against the rear bearing, and the other end of the rear spacer 8 is against the second gear 1022. The rear spacer 8 is used to ensure a fixed distance between the rear bearing and the second gear 1022, and is also used for the lateral positioning of the second gear 1022.

[0069] Alternatively, if Figure 4As shown, the base 1 also includes a bottom plate 13. The first mounting plate 11 and the second mounting plate 12 are respectively vertically connected to the bottom plate 13, and the first mounting plate 11 and the second mounting plate 12 are located on the same side of the bottom plate 13 to ensure that the distance between the first mounting plate 11 and the second mounting plate 12 is fixed. In this embodiment, a reinforcing plate 14 is connected between the first mounting plate 11 and the bottom plate 13 and between the second mounting plate 12 and the bottom plate 13 to provide the connection strength between the first mounting plate 11 and the bottom plate 13 and between the second mounting plate 12 and the bottom plate 13, thereby improving the stability of the first mounting plate 11 and the second mounting plate 12 and reducing the test error.

[0070] In this embodiment, the displacement detection assembly includes a first laser displacement meter and a second laser displacement meter. The first laser displacement meter is used to detect the displacement of the cylindrical gear pair 102 in a preset direction. In some embodiments, the first laser displacement meter is installed on the housing of the cylindrical gear pair 102. The second laser displacement meter is used to detect the displacement of the inter-axle differential assembly 103 in a preset direction. In some embodiments, the second laser displacement meter is installed on the housing of the inter-axle differential assembly 103.

[0071] Furthermore, the displacement detection assembly further includes a temperature sensor, which is mounted on the housing of the inter-axle differential assembly 103 and is used to detect the temperature of the inter-axle differential assembly 103. In this embodiment, the performance of the input shaft string system is determined by testing the rotational motion stability parameters of the cylindrical gear pair 102, the inter-axle differential rotational motion stability parameters of the inter-axle differential assembly 103, and the temperature distribution parameters.

[0072] The input shaft string system performance test device provided in this embodiment requires fewer parts for the input shaft string system, has a simple device, and saves test costs; it can simulate different working conditions of the input shaft string system, which is convenient and flexible; it has fewer test parameters, accurate characterization, simple test steps, and is efficient and fast.

[0073] Embodiment 2

[0074] This embodiment provides an input shaft string system performance test method, which is applied to the input shaft string system performance test device in the first embodiment. Specifically, Fig. 9 As shown, the input shaft string system performance test method includes the following steps:

[0075] S1. Fix the other end of the input shaft 101 on the first mounting plate 11 through the front adjusting nut 21.

[0076] In step S1, different positions of the input shaft 101 can be controlled by adjusting the pre-tightening torque of the front adjusting nut 21, thereby simulating different motion states of the input shaft string system. In this embodiment, the tightening torque of the front adjusting nut 21 is 1050 Nm.

[0077] S2. Fix the inter-axle differential assembly 103 on the second mounting plate 12 through the rear adjusting nut 22.

[0078] In step S2, different positions of the inter-axle differential assembly 103 can be controlled by adjusting the preload torque of the rear adjusting nut 22, thereby simulating different motion states of the input shaft string system. In this embodiment, the tightening torque of the rear adjusting nut 22 is 1050Nm, and the distance between the front adjusting nut 21 and the rear adjusting nut 22 is adjusted to 880mm.

[0079] S3. Support the inter-axle differential assembly 103 through the end support assembly 3.

[0080] In this step, the shaft end of the flange shaft 31 is inserted into the rear bevel gear of the inter-axle differential assembly 103 to simulate the differential state.

[0081] S4, connecting the torque output assembly 4 and the second gear 1022 of the cylindrical gear pair 102.

[0082] In step S4, the output shaft 41 is connected to the second gear 1022, and the front bearing cover 5, the front bearing, the rear bearing cover 6, the rear bearing, the front spacer 7 and the rear spacer 8 are assembled in position. After the steps S1 to S4 are implemented, the entire input shaft train system performance test device is as follows: Figure 1 shown.

[0083] S5. Fixedly install the displacement detection component on the cylindrical gear pair 102 and / or the inter-axle differential assembly 103.

[0084] In step S5, the first laser displacement meter and the second laser displacement meter are installed respectively, and the first laser displacement meter is installed on the cylindrical gear pair 102, so that it can test the rotational radial runout of the cylindrical gear pair 102, and measure the range and maximum value of its radial runout. The second laser displacement meter is installed on the housing of the inter-axle differential assembly 103, so that it can test the rotational radial runout of the inter-axle differential assembly 103, and measure the range and maximum value of its radial runout. When the input shaft string system performance test device includes a temperature sensor, the temperature sensor is installed on the housing of the inter-axle differential assembly 103, so that it can measure the temperature distribution of the housing of the inter-axle differential assembly 103.

[0085] S6. Input a preset rotation speed and a preset torque to the input shaft 101, and detect the displacement of the cylindrical gear pair 102 and / or the inter-axle differential assembly 103 in a preset direction through the displacement detection component.

[0086] Before executing step S6, the input shaft 101 can be connected to the test input dynamometer, and the output shaft 41 can be connected to the test output dynamometer, and the input torque of the test input dynamometer is set to 1000Nm, that is, the preset torque is 1000Nm; the input speed is 100r / min, that is, the preset speed is 100r / min. Through step S6, the actual operating condition of the input shaft string system can be simulated, and the simulation of the dynamic state of the input shaft string system is realized, which has a high reference value.

[0087] S7. Determine the performance level of the input shaft train system by the displacement of the cylindrical gear pair 102 and / or the inter-axle differential assembly 103 in a preset direction.

[0088] In step S7, the performance level of the input shaft string system can also be determined in combination with the displacement data and the temperature data, that is, the performance of the input shaft string system is determined after testing the rotational motion stability parameters of the cylindrical gear pair 102, the rotational motion stability parameters of the inter-axle differential assembly 103, and the temperature distribution parameters. It should be noted that in step S7, the measured parameters are compared with the ideal values ​​to determine the performance level of the input shaft string system. In this embodiment, the performance level of the input shaft string system can be divided into several levels such as excellent, good, good, and poor, and the specific level of the input shaft string system is determined according to the difference between the measured parameter value and the ideal value.

[0089] The input shaft string system performance test method provided in this embodiment is to first assemble the input shaft 101 and the inter-axle differential assembly 103 on the base 1 through the preload component 2, and support the inter-axle differential assembly 103 through the end support component 3. The torque output component 4 is used to output the torque input by the input shaft 101, so as to realize the simulation of the actual working state of the input shaft string system. The displacement of the cylindrical gear pair 102 and / or the inter-axle differential assembly 103 in a preset direction is detected by the displacement detection component. The performance level of the input shaft string system can be further determined through analysis, thereby improving the product development progress and the efficiency of problem solving.

[0090] Optionally, step S7 includes the following steps:

[0091] S71, detecting a first displacement of the cylindrical gear pair 102 in a preset direction.

[0092] In step S71, a first laser displacement meter may be used to detect a first displacement of the cylindrical gear pair 102 in a preset direction.

[0093] S72, detecting a second displacement of the inter-axle differential assembly 103 in a preset direction.

[0094] In step S72 , a second displacement of the inter-axle differential assembly 103 in a preset direction may be detected by a second laser displacement meter.

[0095] S73, comparing the relationship between the first displacement and the second displacement and the first preset displacement and the second preset displacement.

[0096] Specifically, when the first displacement and / or the second displacement is greater than the first preset displacement, the performance level of the input shaft string system is determined to be poor; when the first displacement and the second displacement are both less than the second preset displacement, the performance level of the input shaft string system is determined to be excellent; when the first displacement is less than or equal to the first preset displacement and greater than the second preset displacement, and the second displacement is less than or equal to the first preset displacement, or the second displacement is less than or equal to the first preset displacement and greater than the second preset displacement, and the first displacement is less than or equal to the first preset displacement, the performance level of the input shaft string system is determined to be good.

[0097] In this embodiment, the performance level of the input shaft string system can also be determined in combination with the temperature condition of the inter-axle differential assembly. For example, when the first displacement is greater than the first preset displacement, the second displacement is greater than the first preset displacement and / or the temperature of the inter-axle differential assembly is greater than the upper temperature limit, the performance level of the input shaft string system is determined to be poor; when the first displacement and the second displacement are both less than the second preset displacement and the temperature of the inter-axle differential assembly is lower than the upper temperature limit, the performance level of the input shaft string system is determined to be excellent.

[0098] The above embodiments are only to illustrate the basic principles and characteristics of the present invention. The present invention is not limited by the above embodiments. Without departing from the spirit and scope of the present invention, the present invention may be subject to various changes and modifications, which are within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An input shaft train system performance test device, the input shaft train system comprising an input shaft (101), a cylindrical gear pair (102) sleeved on the middle of the input shaft (101), and an inter-axle differential assembly (103) mounted on one end of the input shaft (101), the input shaft (101) being connected to a first gear (1021) of the cylindrical gear pair (102), characterized in that: The input shaft string system performance testing device comprises: A base (1) comprises a first mounting plate (11) and a second mounting plate (12) which are arranged opposite to each other, wherein the first mounting plate (11) has a first through hole (111), and the second mounting plate (12) has a second through hole (121); A preload assembly (2), comprising a front adjustment nut (21) installed in the first through hole (111) and a rear adjustment nut (22) installed in the second through hole (121), wherein the front adjustment nut (21) is used to fix the other end of the input shaft (101), and the rear adjustment nut (22) is used to fix the inter-axle differential assembly (103); An end support assembly (3) for supporting the inter-axle differential assembly (103); a torque output assembly (4), rotatably mounted on the first mounting plate (11) and the second mounting plate (12), and used to be connected to the second gear (1022) of the cylindrical gear pair (102); the torque output assembly (4) comprises an output shaft (41) and an end cover (42) fixed to one end of the output shaft (41); the output shaft (41) is rotatably mounted on the first mounting plate (11) and the second mounting plate (12), and a middle portion of the output shaft (41) is used to pass through the second gear (1022) and be connected to the second gear (1022); A displacement detection component is used to detect the displacement of the cylindrical gear pair (102) and / or the inter-axle differential assembly (103) in a preset direction, wherein the preset direction is perpendicular to the arrangement direction of the first mounting plate (11) and the second mounting plate (12).

2. The input shaft train system performance test device according to claim 1, characterized in that: The end support assembly (3) comprises a flange shaft (31), the axis of the flange shaft (31) is colinear with the axis of the input shaft (101), and the flange shaft (31) is inserted into the rear bevel gear of the inter-axle differential assembly (103).

3. The input shaft train system performance test device according to claim 1, characterized in that: The input shaft series system performance test device also includes a front bearing cover (5), a front bearing, a rear bearing cover (6) and a rear bearing, wherein the front bearing cover (5) is fixedly mounted on the first mounting plate (11), the other end of the output shaft (41) is rotatably mounted on the front bearing cover (5) through the front bearing, the rear bearing cover (6) is fixedly mounted on the second mounting plate (12), and the middle part of the output shaft (41) is rotatably mounted on the rear bearing cover (6) through the rear bearing.

4. The input shaft train system performance test device according to claim 3, characterized in that: The input shaft string system performance testing device also includes a front spacer (7), which is sleeved on the output shaft (41), and one end of the front spacer (7) is against the front bearing, and the other end of the front spacer (7) is used to abut the second gear (1022).

5. The input shaft train system performance test device according to claim 3, characterized in that: The input shaft string system performance testing device also includes a rear spacer (8), which is sleeved on the output shaft (41), and one end of the rear spacer (8) is against the rear bearing, and the other end of the rear spacer (8) is used to abut the second gear (1022).

6. The input shaft train system performance test device according to claim 1 or 2, characterized in that: The base (1) further comprises a bottom plate (13), the first mounting plate (11) and the second mounting plate (12) being respectively vertically connected to the bottom plate (13), and the first mounting plate (11) and the second mounting plate (12) being located on the same side of the bottom plate (13).

7. The input shaft train system performance testing device according to claim 1 or 2, characterized in that: The displacement detection component comprises a first laser displacement meter and a second laser displacement meter, the first laser displacement meter being used to detect the displacement of the cylindrical gear pair (102) in the preset direction, and the second laser displacement meter being used to detect the displacement of the inter-axle differential assembly (103) in the preset direction.

8. The input shaft train system performance testing device according to claim 1 or 2, characterized in that: The input shaft series system performance testing device further comprises a temperature sensor, and the temperature sensor is used to detect the temperature of the inter-axle differential assembly (103).

9. Input shaft string system performance test method, characterized in that: The input shaft string system performance test device according to any one of claims 1 to 8, the input shaft string system performance test method comprises the following steps: The other end of the input shaft (101) is fixed on the first mounting plate (11) via a front adjusting nut (21); The inter-axle differential assembly (103) is fixed to the second mounting plate (12) via a rear adjustment nut (22); The inter-axle differential assembly (103) is supported by the end support assembly (3); connecting the torque output assembly (4) and the second gear (1022) of the cylindrical gear pair (102); The displacement detection component is fixedly mounted on the cylindrical gear pair (102) and / or the inter-axle differential assembly (103); Inputting a preset rotation speed and a preset torque into the input shaft (101), and detecting the displacement of the cylindrical gear pair (102) and / or the inter-axle differential assembly (103) in a preset direction through the displacement detection component; The performance level of the input shaft train system is determined by the displacement of the cylindrical gear pair (102) and / or the inter-axle differential assembly (103) in a preset direction.

10. The input shaft train system performance testing method according to claim 9, characterized in that: Determining the performance level of the input shaft train system by displacement of the cylindrical gear pair (102) and / or the inter-axle differential assembly (103) in a preset direction comprises the following steps: Detecting a first displacement of the cylindrical gear pair (102) in the preset direction; Detecting a second displacement of the inter-axle differential assembly (103) in the preset direction; comparing the relationship between the first displacement and the second displacement and the first preset displacement and the second preset displacement, and when the first displacement and / or the second displacement is greater than the first preset displacement, determining that the performance level of the input shaft string system is poor; and when the first displacement and the second displacement are both less than the second preset displacement, determining that the performance level of the input shaft string system is excellent; When the first displacement is less than or equal to the first preset displacement and greater than the second preset displacement, and the second displacement is less than or equal to the first preset displacement, or the second displacement is less than or equal to the first preset displacement and greater than the second preset displacement, and the first displacement is less than or equal to the first preset displacement, it is determined that the performance level of the input shaft string system is good.

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