Coaxial speed reducer testing device

Abstract

The utility model relates to a coaxial speed reducer testing device. The coaxial speed reducer testing device comprises a transmission box, a testing driving assembly, a first testing load assembly and a second testing load assembly. The transmission case comprises a case body, a first shaft body and a second shaft body. And the first shaft body and the second shaft body are in transmission fit. The first shaft body and the second shaft body are arranged in a spaced mode in the radial direction of the second shaft body. The two ends of the second shaft body are arranged in a penetrating mode, one end of the second shaft body is used for being connected with the input end of the coaxial speed reducer assembly, and the second shaft body is used for allowing an inner half shaft of the coaxial speed reducer assembly to penetrate through. The test drive assembly has a drive shaft. And the driving shaft is in transmission fit with the first shaft body. The input end of the first test load assembly is used for being connected with an inner half shaft of the coaxial speed reducer assembly. The input end of the second test load assembly is used for being connected with the other inner half shaft of the coaxial speed reducer assembly, and interference between the test drive assembly and the inner half shaft extending to the same side of the transmission case is avoided.

Description

Technical Field

[0001] The present application relates to the technical field of coaxial reducer testing, and in particular to a coaxial reducer testing device. Background Art

[0002] In recent years, with the increase in sales and share of new energy vehicles, the technological development of new energy vehicles has been accelerated, and the investment in R&D and testing of new energy vehicles has also increased.

[0003] Some new energy vehicles use drive motors to provide power, and the drive motors drive the wheels through the reducer, so that the vehicle has a large torque output at low speed. In order to make the two coaxial wheels rotate at the same time, some new energy vehicles use a coaxial electric drive system, that is, the drive shaft of the drive motor is hollow and connected to the input shaft of the coaxial reducer. One half shaft of the reducer is connected to one wheel, and the other half shaft passes through the drive shaft coaxially and then connects to the other wheel.

[0004] During the development or production of coaxial reducers, it is necessary to test the coaxial reducers. Since the drive motor used in the test cannot provide a hollow passage space, interference occurs between one of the inner half-axles of the reducer and the test drive motor. Therefore, when using the traditional test device, the differential structure of the coaxial reducer is first removed, one of the half-axles is disassembled, and twice the load is applied to the remaining half-axle, resulting in the inability to test the differential structure performance of the coaxial reducer and the simultaneous output performance of the two half-axles. At the same time, the coaxial reducer may malfunction during the test due to the excessive load on a single half-axle. Summary of the invention

[0005] Based on this, it is necessary to provide a coaxial reducer testing device in view of the fact that when using the traditional testing device, it is necessary to first remove the differential structure of the coaxial reducer and apply twice the load to the remaining half-shafts, which makes it impossible to test the differential structure performance and the simultaneous output performance of the two half-shafts. At the same time, abnormal problems may occur due to a single half-shaft bearing too large a load.

[0006] A coaxial reducer testing device, comprising:

[0007] A transmission box, comprising a box body, a first shaft body and a second shaft body; the first shaft body and the second shaft body are rotatably mounted on the box body respectively; a transmission fit is formed between the first shaft body and the second shaft body; along the radial direction of the second shaft body, the first shaft body and the second shaft body are arranged at intervals; the second shaft body is arranged with both ends penetrating; one end of the second shaft body is used to connect to the input end of the coaxial reducer assembly; the second shaft body is used for an inner half shaft of the coaxial reducer assembly to pass through;

[0008] A test drive assembly having a drive shaft; the drive shaft forms a transmission fit with the first shaft body;

[0009] a first test load assembly, wherein an input end of the first test load assembly is used to connect an inner half shaft of the coaxial reducer assembly; and

[0010] A second test load assembly, wherein the input end of the second test load assembly is used to connect to another inner half-shaft of the coaxial reducer assembly.

[0011] The above-mentioned coaxial reducer test device, when using the coaxial reducer test device, the drive shaft of the test drive component rotates, and the test drive component simulates the vehicle drive motor to transmit the required power to the coaxial reducer assembly. The drive shaft drives the first shaft body to rotate relative to the housing, and then the first shaft body drives the second shaft body to rotate relative to the housing. Since one end of the second shaft body is connected to the input end of the coaxial reducer assembly, the input end of the coaxial reducer assembly rotates. Under the internal transmission cooperation of the coaxial reducer assembly, the two inner half shafts of the coaxial reducer assembly rotate at the same time. One inner half shaft is connected to the first test load component, and the first test load component can test the torque and speed of the inner half shaft. The other inner half shaft is connected to the second test load component, and the second test load component can test the torque and speed of the inner half shaft, so that the relevant parameters of the coaxial reducer assembly during the test can be obtained, and the performance or other conditions of the coaxial reducer assembly can be confirmed. When the drive shaft is connected to the first shaft body, the test drive assembly is on one side of the transmission case, and an inner half-shaft of the coaxial reducer assembly passes through the second shaft body, since the first shaft body and the second shaft body are arranged at intervals in the radial direction, the test drive assembly and the inner half-shaft of the coaxial reducer assembly can be spaced apart in the radial direction, thereby avoiding interference between the test drive assembly and the inner half-shaft extending to the same side of the transmission case. The coaxial reducer assembly is connected to the two inner half-shafts with the first test load assembly and the second test load assembly respectively, thereby retaining the test conditions for the differential structure performance of the coaxial reducer assembly and the simultaneous output performance of the two inner half-shafts. At the same time, it avoids the need to apply double load to a single inner half-shaft, preventing abnormalities in the coaxial reducer assembly.

[0012] In one embodiment, it also includes a first transmission shaft, and the first test load assembly is connected to an inner half-shaft of the coaxial reducer assembly through the first transmission shaft; and / or, the coaxial reducer testing device also includes a second transmission shaft, and the second test load assembly is connected to another inner half-shaft of the coaxial reducer assembly through the second transmission shaft.

[0013] In one embodiment, when the coaxial reducer test device includes the first transmission shaft, the coaxial reducer test device also includes a third transmission shaft and a transition bearing seat; the transition bearing seat is connected between one end of the third transmission shaft and the first transmission shaft; the other end of the third transmission shaft is connected to the input end of the first test load assembly.

[0014] In one of the embodiments, it further includes a first torque sensor; the first torque sensor is connected to the second shaft for connecting to one end of the coaxial reducer assembly; the first torque sensor is hollow and is used for an inner half shaft of the coaxial reducer assembly to pass through.

[0015] In one embodiment, a transition flange is further included; a flange portion is formed at one end of the second shaft; and the first torque sensor is connected between the transition flange and the flange portion.

[0016] In one of the embodiments, the transmission box is connected to a vibration sensor, a temperature sensor, a pressure sensor or a flow sensor.

[0017] In one of the embodiments, it also includes a support plate; the support plate is fixedly arranged relative to the transmission box; the support plate is used to connect the coaxial reducer assembly.

[0018] In one embodiment, the test drive assembly includes a test drive motor, a drive sensor and a coupling; the drive sensor and the coupling are connected in sequence between the drive shaft of the test drive motor and the first shaft; the drive sensor is used to detect the rotational speed and / or torque of the drive shaft of the test drive motor.

[0019] In one embodiment, the first test load assembly includes a first load motor and a first load sensor, and the input shaft of the first load motor is connected to an inner half-shaft of the coaxial reducer assembly through the first load sensor; and / or, the second test load assembly includes a second load motor and a second load sensor, and the input shaft of the second load motor is connected to the other inner half-shaft of the coaxial reducer assembly through the second load sensor.

[0020] In one embodiment, the transmission box further includes a plurality of bearing members, wherein the bearing members are arranged between the second shaft body and the housing along the radial direction of the second shaft body; and / or, the transmission box further includes a seal, wherein the seal is arranged on a side of the housing close to the first test load assembly and is used for allowing an inner half shaft of the coaxial reducer assembly to pass through. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] FIG. 1 is a three-dimensional schematic diagram of a coaxial reducer testing device according to an embodiment of the present application.

[0022] FIG. 2 is a partial schematic diagram of the coaxial reducer testing device shown in FIG. 1 .

[0023] FIG. 3 is an enlarged view of point A of the coaxial reducer test device shown in FIG. 2 .

[0024] 1. The gearbox of the embodiment of the present invention is as follows: 100, coaxial reducer test device; 20, transmission box; 21, housing; 22, first shaft; 23, second shaft; 24, first torque sensor; 25, flange; 26, bearing; 27, sealing; 28, outer cover; 30, test drive assembly; 31, test drive motor; 32, drive sensor; 33, coupling; 40, first test load assembly; 41, first transmission shaft; 42, third transmission shaft; 43, transition bearing seat; 44, first load motor; 45, first load sensor; 50, second test load assembly; 51, second transmission shaft; 52, second load motor; 53, second load sensor; 60, transition flange; 70, support plate; 900, coaxial reducer assembly; 901, housing; 902, reduction assembly; 903, differential assembly; 904, inner half shaft. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0026] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application 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 application.

[0027] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0028] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated 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, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0029] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it can mean that the first and second features are directly in contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0030] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0031] The technical solution provided by the embodiments of the present application is described below in conjunction with the accompanying drawings.

[0032] In conjunction with FIGS. 1 to 3 , the present application provides a coaxial reducer testing device 100 .

[0033] In some embodiments, in conjunction with FIG. 1 , the coaxial reducer test device 100 is used to test the coaxial reducer assembly 900. Specifically, the coaxial reducer test device 100 is used to implement the function, performance or durability test of the coaxial reducer assembly 900. In some embodiments, the coaxial reducer test device 100 is used to test and confirm whether the coaxial reducer assembly 900 achieves the basic reduction function. In other embodiments, the coaxial reducer test device 100 is used to test the efficiency of the coaxial reducer assembly 900. In yet other embodiments, the coaxial reducer test device 100 is used to test the durability of the coaxial reducer assembly 900.

[0034] In some embodiments, as shown in FIG. 2 , the coaxial reducer assembly 900 includes a housing 901, a reduction assembly 902, a differential assembly 903, and an inner half shaft 904. The reduction assembly 902 and the differential assembly 903 are arranged in the housing 901. The reduction assembly 902 forms the input end of the coaxial reducer assembly 900. A transmission fit is formed between the reduction assembly 902 and the differential assembly 903. Two inner half shafts 904 are respectively connected to the differential assembly 903. The differential assembly 903 is between the two inner half shafts 904. The differential assembly 903 drives the two inner half shafts 904 to rotate respectively. One of the inner half shafts 904 passes through one side of the housing 901, and the other inner half shaft 904 passes through the other side of the housing 901. Specifically, the axes of the two inner half shafts 904 are arranged to coincide with each other. In one embodiment, the differential assembly 903 includes a half shaft gear set or a spline. The two inner half shafts 904 are respectively connected with the half shaft gear sets or splines. Specifically, the reduction assembly 902 includes several gear sets.

[0035] In some embodiments, when the coaxial reducer assembly 900 is actually used, the input end of the coaxial reducer assembly 900 is connected to the vehicle drive motor.

[0036] In some embodiments, in combination with FIG. 1 and FIG. 2 , the coaxial reducer test device 100 includes: a transmission box 20, a test drive assembly 30, a first test load assembly 40, and a second test load assembly 50. The transmission box 20 includes a housing 21, a first shaft 22, and a second shaft 23. The first shaft 22 and the second shaft 23 are rotatably mounted on the housing 21. A transmission fit is formed between the first shaft 22 and the second shaft 23. Along the radial direction of the second shaft 23, the first shaft 22 and the second shaft 23 are arranged at intervals. The second shaft 23 is arranged with both ends through, and one end of the second shaft 23 is used to connect the input end of the coaxial reducer assembly 900, and the second shaft 23 is used for an inner half shaft 904 of the coaxial reducer assembly 900 to pass through. The test drive assembly 30 has a drive shaft. A transmission fit is formed between the drive shaft and the first shaft 22. The input end of the first test load assembly 40 is used to connect an inner half shaft 904 of the coaxial reducer assembly 900. The input end of the second test load assembly 50 is used to connect to another inner half-shaft 904 of the coaxial reducer assembly 900 .

[0037] Specifically, when the coaxial reducer test device 100 is used, the drive shaft of the test drive assembly 30 rotates, and the test drive assembly 30 simulates the vehicle drive motor and transmits the required power to the coaxial reducer assembly 900. The drive shaft drives the first shaft body 22 to rotate relative to the housing 21, and then the first shaft body 22 drives the second shaft body 23 to rotate relative to the housing 21. Since one end of the second shaft body 23 is connected to the input end of the coaxial reducer assembly 900, the input end of the coaxial reducer assembly 900 rotates. Under the internal transmission cooperation of the coaxial reducer assembly 900, the two inner half shafts 904 of the coaxial reducer assembly 900 rotate simultaneously. One inner half shaft 904 is connected to the first test load assembly 40, and the first test load assembly 40 can test the torque and speed of the inner half shaft 904. Another inner half shaft 904 is connected to the second test load assembly 50, and the second test load assembly 50 can test the torque and speed of the inner half shaft 904, so as to obtain the relevant parameters of the coaxial reducer assembly 900 during the test process, and confirm the performance or other conditions of the coaxial reducer assembly 900. When the drive shaft is connected to the first shaft body 22, the test drive assembly 30 is located on one side of the transmission box 20, and an inner half shaft 904 of the coaxial reducer assembly 900 passes through the second shaft body 23, since the first shaft body 22 and the second shaft body 23 are arranged at intervals in the radial direction, the test drive assembly 30 can be spaced apart from the inner half shaft 904 of the coaxial reducer assembly 900 in the radial direction, thereby avoiding interference between the test drive assembly 30 and the inner half shaft 904 extending to the same side of the transmission box 20. The coaxial reducer assembly 900 is connected to the two inner half shafts 904 by the first test load assembly 40 and the second test load assembly 50, respectively, so that the test conditions for the differential structure performance of the coaxial reducer assembly 900 and the simultaneous output performance of the two inner half shafts 904 can be retained. At the same time, it is avoided that a double load is applied to a single inner half shaft 904, and the coaxial reducer assembly 900 is prevented from abnormality.

[0038] Specifically, since there is no need to change the structure or transmission formation of the coaxial reducer assembly 900, the test results of the coaxial reducer testing device 100 are more real and effective. Specifically, for the inner half shaft 904 passing through the second shaft body 23, the inner half shaft 904 and the input end of the coaxial reducer assembly 900 are on the same side.

[0039] Specifically, with the combination of the first test load assembly 40 and the second test load assembly 50, the coaxial reducer test device 100 can operate at the same speed or different speeds, thereby simulating the speed and torque changes of the two wheels when the vehicle is running on an actual road.

[0040] In some embodiments, as shown in FIG. 2 , a meshing transmission is formed between the first shaft 22 and the second shaft 23 through a gear set, which is conducive to a larger center distance between the first shaft 22 and the second shaft 23. In other embodiments, a friction transmission can be formed between the first shaft 22 and the second shaft 23. In other embodiments, a belt transmission or a chain transmission can be used between the first shaft 22 and the second shaft 23.

[0041] In some embodiments, a plurality of pairs of gear sets and belt sets are disposed inside the transmission box 20 , thereby increasing the distance between the first shaft 22 and the second shaft 23 , thereby reserving more sufficient space for arranging the test drive motor 31 .

[0042] In some embodiments, in combination with FIG. 2 and FIG. 3 , the coaxial reducer test device 100 further includes a first torque sensor 24. The first torque sensor 24 is connected to one end of the second shaft 23, and the one end of the second shaft 23 is used to connect to the input end of the coaxial reducer assembly 900. The first torque sensor 24 is hollow and is used for an inner half shaft 904 of the coaxial reducer assembly 900 to pass through. Specifically, since the first torque sensor 24 is connected between one end of the second shaft 23 and the input end of the coaxial reducer assembly 900, the first torque sensor 24 can be used to detect the torque transmitted from the second shaft 23 to the input end of the coaxial reducer assembly 900. Since the first torque sensor 24 is hollow, the inner half shaft 904 on the same side as the input end of the coaxial reducer assembly 900 can pass through the first torque sensor 24 and the second shaft 23 in sequence, and then the inner half shaft 904 is connected to the first test load assembly 40. In one embodiment, the first torque sensor 24 is a hollow torque sensor.

[0043] In some embodiments, as shown in FIG. 2 and FIG. 3 , the coaxial reducer test device 100 further includes a transition flange 60. A flange 25 is formed at one end of the second shaft 23. The first torque sensor 24 is connected between the transition flange 60 and the flange 25. Specifically, the power of the second shaft 23 is sequentially transmitted to the input end of the coaxial reducer assembly 900 via the flange 25, the first torque sensor 24 and the transition flange 60. The transition flange 60 is used to dock the input end of the coaxial reducer assembly 900. By using transition flanges 60 of different specifications, the first torque sensor 24 can be docked with the input end of the coaxial reducer assembly 900 of different specifications. The flange 25 extends radially relative to the rod portion of the second shaft 23, so that a larger docking area can be provided between the flange 25 and the first torque sensor 24, which is beneficial to increase the installation docking space of the first torque sensor 24 and the second shaft 23, and is beneficial to improve the reliability of the first torque sensor 24.

[0044] In some embodiments, the transmission box 20 is connected to a vibration sensor, a temperature sensor, a pressure sensor or a flow sensor, so that the operating state and the operating temperature of the transmission box 20 during operation can be dynamically monitored to ensure that the transmission box 20 can operate efficiently and reliably for a long time, thereby reducing the maintenance cost of the transmission box 20. Specifically, the vibration sensor can be fixed on the inside or outside of the box body 21, and is used to detect the vibration of the box body 21 to confirm the transmission condition in the transmission box 20. The temperature sensor can be set on the inside or outside of the box body 21, and is used to detect the temperature of the box body 21 to confirm whether the transmission box 20 is in a normal temperature range. Specifically, the pressure sensor can be set inside the box body 21 to confirm the pressure condition of the fluid in the box body 21. Specifically, the flow sensor is used to check the flow rate of the fluid entering and leaving the box body 21.

[0045] In some embodiments, as shown in FIG2 , the transmission box 20 further includes a plurality of bearing members 26, which are disposed between the second shaft body 23 and the housing 21 along the radial direction of the second shaft body 23, thereby reducing the friction between the housing 21 and the second shaft body 23. Specifically, the second shaft body 23 is sleeved with at least two bearing members 26, thereby ensuring the stability of the second shaft body 23.

[0046] In some embodiments, as shown in FIG. 2 , the transmission case 20 further includes a seal 27, which is disposed on one side of the case 21 close to the first test load assembly 40 and is used for passing an inner half shaft 904 of the coaxial reducer assembly 900. The outer side of the seal 27 forms a seal fit with the case 21, while the inner side is attached to the inner half shaft 904, thereby playing a sealing role on the outer periphery of the inner half shaft 904. In some embodiments, the transmission case 20 further includes an outer cover 28, and the seal 27 is located on the outer side of the case 21. The outer wall of the case 21 is enclosed and matched with the outer cover 28, and forms a space for accommodating the seal 27. In some embodiments, the seal 27 is a silicone ring.

[0047] In some embodiments, the coaxial reducer test device 100 further includes a forced lubrication system connected to the transmission box 20. The forced lubrication system is used to lubricate the shaft system, gears or structures that need cooling in the transmission box 20 to ensure that the transmission box 20 is maintained within a reasonable working range.

[0048] In some embodiments, as shown in FIG. 1 , the test drive assembly 30 includes a test drive motor 31, a drive sensor 32, and a main coupling 33. The drive sensor 32 and the main coupling 33 are connected in sequence between the drive shaft of the test drive motor 31 and the first shaft body 22. The drive sensor 32 is used to detect the rotational speed or torque of the drive shaft of the test drive motor 31. Specifically, the main coupling 33 enables the drive shaft of the test drive motor 31 to be coaxially connected to the drive sensor 32. Since the drive sensor 32 is connected between the drive shaft of the test drive motor 31 and the drive sensor 32, the torque transmitted by the drive shaft to the first shaft body 22 can be detected, or the rotational speed of the drive shaft can be detected.

[0049] In some embodiments, the drive sensor 32 is used to detect the rotation speed and torque of the drive shaft of the test drive motor 31, so as to obtain the output power of the test drive assembly 30 or the input power of the transmission box 20. In some embodiments, the main coupling 33 is a high-speed coupling 33.

[0050] In some embodiments, in combination with FIG. 1 , the coaxial reducer test device 100 further includes a first transmission shaft 41, and the first test load assembly 40 is connected to an inner half shaft 904 of the coaxial reducer assembly 900 through the first transmission shaft 41. Specifically, in the actual application of the coaxial reducer assembly 900, due to the length limitation of the inner half shaft 904, the inner half shaft 904 needs to be connected to the wheel through the transmission shaft. In the coaxial reducer test device 100, by setting the first transmission shaft 41, the first test load assembly 40 is connected to the inner half shaft 904 close to it through the first transmission shaft 41, thereby providing the coaxial reducer assembly 900 with a test condition close to the actual environment, and is conducive to avoiding the first test load assembly 40 from interfering with the test drive assembly 30. In some embodiments, the first transmission shaft 41 is connected to the first test load assembly 40 through a coupling 33, or is connected to the inner half shaft 904 through a coupling 33.

[0051] In some embodiments, as shown in FIG1 , the first test load assembly 40 includes a first load motor 44 and a first load sensor 45, and the input shaft of the first load motor 44 is connected to an inner half shaft 904 of the coaxial reducer assembly 900 through the first load sensor 45. Specifically, since the first load sensor 45 is connected between the input shaft of the first load motor 44 and the inner half shaft 904, the first load sensor 45 can be used to detect the rotation speed or torque of the inner half shaft 904 of the coaxial reducer assembly 900.

[0052] In some embodiments, the first load sensor 45 is used to detect the rotation speed and torque of an inner half shaft 904 of the coaxial reducer assembly 900 , so as to obtain the output power of an inner half shaft 904 of the coaxial reducer assembly 900 or the input power of the first load motor 44 .

[0053] In some embodiments, in combination with FIG. 1 , the coaxial reducer test device 100 further includes a second transmission shaft 51, and the second test load assembly 50 is connected to another inner half shaft 904 of the coaxial reducer assembly 900 through the second transmission shaft 51. Specifically, in the coaxial reducer test device 100, by providing the second transmission shaft 51, the second test load assembly 50 is connected to the inner half shaft 904 close thereto through the second transmission shaft 51, thereby providing the coaxial reducer assembly 900 with a test condition close to the actual environment. In some embodiments, the second transmission shaft 51 is connected to the second test load assembly 50 through a coupling 33, or is connected to the inner half shaft 904 through a coupling 33.

[0054] In some embodiments, in combination with FIG. 1 , when the coaxial reducer test device 100 includes a first transmission shaft 41, the coaxial reducer test device 100 also includes a third transmission shaft 42 and a transition bearing seat 43. The transition bearing seat 43 is connected between one end of the third transmission shaft 42 and the first transmission shaft 41. The other end of the third transmission shaft 42 is connected to the input end of the first test load assembly 40. Specifically, by providing the third transmission shaft 42, and connecting the first test load assembly 40 and the first transmission shaft 41 through the third transmission shaft 42, the distance between the first test load assembly 40 and the transmission box 20 can be increased. When the first test load assembly 40 and the test drive assembly 30 are on the same side of the transmission box 20, the first test load assembly 40 can be further prevented from interfering with the test drive assembly 30. The transition bearing seat 43 is connected between the end of the first transmission shaft 41 and the end of the second transmission shaft 51, so that the rotation stability of the first transmission shaft 41 and the second transmission shaft 51 can be ensured.

[0055] Furthermore, by selecting a first transmission shaft 41 or a third transmission shaft 42 with an axial telescopic structure, or selecting a first transmission shaft 41 or a third transmission shaft 42 of different lengths, or replacing the third transmission shaft 42 with other more complete transmission structures, the distance adjustment or angle adjustment of the first test load assembly 40 relative to the transmission box 20 can be achieved.

[0056] In some embodiments, as shown in FIG1 , the second test load assembly 50 includes a second load motor 52 and a second load sensor 53, and the input shaft of the second load motor 52 is connected to the other inner half shaft 904 of the coaxial reducer assembly 900 through the second load sensor 53. Specifically, since the second load sensor 53 is connected between the input shaft of the second load motor 52 and the other inner half shaft 904, the second load sensor 53 can be used to detect the rotation speed or torque of the other inner half shaft 904 of the coaxial reducer assembly 900.

[0057] In some embodiments, the second load sensor 53 is used to detect the rotation speed and torque of the other inner half shaft 904 of the coaxial reducer assembly 900, so as to obtain the output power of the other inner half shaft 904 of the coaxial reducer assembly 900 or the input power of the second load motor 52.

[0058] In some embodiments, in combination with FIG. 2 and FIG. 3 , the coaxial reducer test device 100 further includes a support plate 70. The support plate 70 is fixedly arranged relative to the transmission box 20, and the support plate 70 is used to connect the coaxial reducer assembly 900, so that the coaxial reducer assembly 900 is in a stable position relative to the transmission box 20. In some embodiments, the coaxial reducer test device 100 further includes a bottom plate, and the box body 21 and the support plate 70 are respectively fixedly connected to the bottom plate, so that the support plate 70 is fixedly arranged relative to the transmission box 20. In some embodiments, the support plate 70 is fixedly connected to the housing 901.

[0059] In some embodiments, the housing 901 is provided with a mounting hole, and a fastener is passed through the support plate 70 and the mounting hole, so that the housing 901 and the support plate 70 are connected and fixed.

[0060] In some embodiments, the coaxial reducer testing device 100 further includes a control unit for performing signal interaction with the test drive assembly 30, the first test load assembly 40, the second test load assembly 50 and the first torque sensor 24 to receive relevant test data or issue control instructions.

[0061] In some embodiments, the first axis 22 and the second axis 23 are arranged in parallel or at an angle. When there is a deviation in the center height of the test drive motor 31 and the first load motor 44, the second axis 23 can be deflected upward or downward by a certain angle relative to the first axis 22, thereby meeting the usage requirements of various scenarios.

[0062] In some embodiments, before testing the coaxial reducer assembly 900 on the coaxial reducer testing device 100, it is necessary to select a suitable transition flange 60 and support plate 70, as well as other required auxiliary connection components according to the structural form and interface of the coaxial reducer assembly 900. If there is a need for torque measurement, it is necessary to first install the hollow first torque sensor 24 on the flange portion 25 of the second shaft body 23.

[0063] In some embodiments, the application process of the coaxial reducer testing device 100 includes the following operations:

[0064] First, the transition flange 60 is connected to the flange portion 25 of the second shaft body 23 of the transmission box 20 or the hollow first torque sensor 24 .

[0065] Second, install the support plate 70 to a fixed position relative to the transmission box 20. Install the coaxial reducer assembly 900 on the support plate 70 and tighten it with bolts.

[0066] Third, install the two inner half shafts 904 of the coaxial reducer assembly 900. In some embodiments, according to the structure of the coaxial reducer assembly 900 sample, it may be necessary to install the inner half shaft 904 on the same side as the input end of the coaxial reducer assembly 900 before installation.

[0067] Fourth, install the first transmission shaft 41 and the second transmission shaft 51, connect the first transmission shaft 41 with the transition bearing seat 43, connect the transition bearing seat 43 and the first load motor 44 together through the third transmission shaft 42, and connect the second transmission shaft 51 with the second load motor 52.

[0068] Fifth, lubricating oil is added to the transmission box 20 according to the technical requirements of the coaxial reducer assembly 900. The control unit is started, and key setting parameters such as input and output torque, speed, oil temperature, and running time are set according to the test requirements through the software system of the control unit to start the test.

[0069] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0070] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A coaxial reducer testing device, characterized in that: include: A transmission box, comprising a box body, a first shaft body and a second shaft body; the first shaft body and the second shaft body are rotatably mounted on the box body respectively; a transmission fit is formed between the first shaft body and the second shaft body; along the radial direction of the second shaft body, the first shaft body and the second shaft body are arranged at intervals; the second shaft body is arranged with both ends penetrating; one end of the second shaft body is used to connect to the input end of the coaxial reducer assembly; the second shaft body is used for an inner half shaft of the coaxial reducer assembly to pass through; A test drive assembly having a drive shaft; the drive shaft forms a transmission fit with the first shaft body; a first test load assembly, wherein an input end of the first test load assembly is used to connect an inner half shaft of the coaxial reducer assembly; and A second test load assembly, wherein the input end of the second test load assembly is used to connect to another inner half-shaft of the coaxial reducer assembly.

2. The coaxial reducer testing device according to claim 1, characterized in that: It also includes a first transmission shaft, through which the first test load assembly is connected to an inner half-shaft of the coaxial reducer assembly; and / or the coaxial reducer testing device also includes a second transmission shaft, through which the second test load assembly is connected to another inner half-shaft of the coaxial reducer assembly.

3. The coaxial reducer testing device according to claim 2, characterized in that: When the coaxial reducer test device includes the first transmission shaft, the coaxial reducer test device also includes a third transmission shaft and a transition bearing seat; the transition bearing seat is connected between one end of the third transmission shaft and the first transmission shaft; the other end of the third transmission shaft is connected to the input end of the first test load assembly.

4. The coaxial reducer testing device according to claim 1, characterized in that: It also includes a first torque sensor; the first torque sensor is connected to the second shaft for connecting to one end of the coaxial reducer assembly; the first torque sensor is hollow and is used for an inner half shaft of the coaxial reducer assembly to pass through.

5. The coaxial reducer testing device according to claim 4, characterized in that: It also includes a transition flange; a flange portion is formed at one end of the second shaft; and the first torque sensor is connected between the transition flange and the flange portion.

6. The coaxial reducer testing device according to claim 1, characterized in that: The transmission box is connected with a vibration sensor, a temperature sensor, a pressure sensor or a flow sensor.

7. The coaxial reducer testing device according to claim 1, characterized in that: It also includes a support plate; the support plate is fixedly arranged relative to the transmission box; the support plate is used to connect the coaxial reducer assembly.

8. The coaxial reducer testing device according to claim 1, characterized in that: The test drive assembly includes a test drive motor, a drive sensor and a coupling; the drive sensor and the coupling are connected in sequence between the drive shaft of the test drive motor and the first shaft; the drive sensor is used to detect the rotational speed and / or torque of the drive shaft of the test drive motor.

9. The coaxial reducer testing device according to claim 1, characterized in that: The first test load assembly includes a first load motor and a first load sensor, and the input shaft of the first load motor is connected to an inner half-shaft of the coaxial reducer assembly through the first load sensor; and / or, the second test load assembly includes a second load motor and a second load sensor, and the input shaft of the second load motor is connected to the other inner half-shaft of the coaxial reducer assembly through the second load sensor.

10. The coaxial reducer testing device according to claim 1, characterized in that: The transmission box also includes a plurality of bearing members, which are arranged between the second shaft body and the box body along the radial direction of the second shaft body; and / or the transmission box also includes a seal, which is arranged on a side of the box body close to the first test load assembly and is used for allowing an inner half shaft of the coaxial reducer assembly to pass through.

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