A test device for independent testing of NW wheel reducers

Abstract

The present invention discloses a test device for independent testing of NW wheel-side reducers, which relates to the technical field of wheel-side reducer testing, including two NW wheel-side reducers to be tested, two sets of test devices, respectively connected to the corresponding NW wheel-side reducers to be tested, and the test device includes: a speed increasing device, a supporting device, a torque transmission device, and an adaptive transmission device. Aiming at the problem that it is difficult to independently test the NW wheel-side reducer, the present invention realizes the independent loading test of the NW wheel-side reducer on a conventional test bench through the function of the adaptive transmission device.

Description

Technical Field

[0001] The present invention relates to the technical field of wheel-end reducer testing, and in particular to a testing device for independent testing of NW wheel-end reducers. Background Art

[0002] The NW wheel-side reducer is the core transmission component of the mining dump truck. It is installed inside the driving wheel of the mining truck and is independently driven to transmit power, reduce speed and increase torque, thereby improving the driving force and carrying capacity of the mining truck. Due to the harsh mining environment and special road conditions, the wheel-side reducer has the characteristics of high load-bearing capacity, high stability, and long life cycle. In order to ensure the reliability of the reducer and reduce the impact of the traction motor on the test, it is a more reliable solution to independently verify the reducer. The test method of the conventional test bench is to use a closed power flow test bench for towing loading, which requires the input and output ends to be located on both sides. However, the input and output ends of the NW wheel-side reducer are located on the same side, and towing loading cannot be used. The existing conventional test bench cannot perform loading tests on wheel-side reducers with this structure.

[0003] In order to solve the above problems, it is urgent to develop a test device that can perform NW wheel reducer loading tests based on a conventional test bench. Summary of the invention

[0004] In accordance with the technical problems raised above, a test device for independent testing of NW wheel-end reducers is provided.

[0005] The technical means adopted by the present invention are as follows:

[0006] A test device for independent testing of NW wheel-side reducers, comprising two NW wheel-side reducers to be tested, two sets of test devices, respectively connected to the corresponding NW wheel-side reducers to be tested, the test device comprising: a speed increasing device, a supporting device, a torque transmission device, and an adapting transmission device;

[0007] The speed increasing device comprises a motor, a torque speed monitoring device and a speed increasing gearbox, wherein the motor of one set of test devices is a main test motor, and the motor of the other set of test devices is a companion test motor, the main test motor and the companion test motor are respectively connected to the two sets of torque speed monitoring devices, and are positioned through bearings, the torque speed monitoring device is connected to the speed increasing gearbox through a coupling, the speed increasing gearbox is installed on the speed increasing gearbox bracket, the speed increasing gearbox bracket is fixed on the test platform, and the output end of the speed increasing gearbox is connected to the universal joint shaft of the matching transmission device;

[0008] The support device includes a support seat, a support cover, a support seat bolt group, a base and a base bolt group. The NW wheel-side reducer is installed on the support seat, a support cover is arranged on the support seat, the support seat and the support cover are connected by a support seat bolt group, the support seat is installed on the base, the base is fixed on the test platform, and the support seat and the base are connected and fixed by the base bolt group;

[0009] The torque transmission device comprises a first torque transmission flange and a second torque transmission flange, the first torque transmission flange comprises a plurality of large diameter holes and a plurality of small diameter holes, the small diameter holes of the first torque transmission flange are connected to the output end of the NW wheel-side reducer via a first torque transmission flange bolt group, the large diameter holes of the first torque transmission flange are connected to the second torque transmission flange via a second torque transmission flange bolt group, and the second torque transmission flanges of the two test devices are connected via a flexible pin;

[0010] The adapting transmission device comprises a universal joint shaft, a sleeve, a locking plate, a transmission shaft, an axle box, a first support bearing, a second support bearing, a first gland, a second gland, a first seal, a second seal, a first adapting flange, a second adapting flange, a first adapting flange bolt group, a second adapting flange bolt group, a third adapting flange bolt group, a sealing housing, a spline sleeve, a transition shaft, a fixing block, a fastening bolt group and an oil return assembly.

[0011] One end of the universal joint is connected to the speed increasing device, and the other end is connected to the shaft sleeve, the shaft sleeve is installed on the transmission shaft and fixedly connected by a locking disk, the transmission shaft is installed inside the axle box, and is supported for rotation by a first support bearing and a second support bearing installed on the axle box, and a first gland and a second gland are respectively provided at both ends of the axle box, and a first seal and a second seal are respectively installed inside the first gland and the second gland, and the first support bearing, the second support bearing and the above-mentioned speed increasing device are cooled and lubricated by a lubrication system;

[0012] The shell of the axle box is installed on the small end face of the first adapter flange and is fixedly connected by the first adapter flange bolt group. The large end face of the first adapter flange is installed on the second adapter flange. The second adapter flange is installed in the support device. The NW wheel-side reducer is installed on the second adapter flange. The first adapter flange, the second adapter flange and the support device are fixedly connected as a whole by the second adapter flange bolt group. The second adapter flange and the NW wheel-side reducer are fixedly connected by the third adapter flange bolt group.

[0013] The sealing housing is installed on the tested NW wheel-side reducer, and the other end is sleeved on the outside of the second gland. The lower part of the sealing housing is provided with an oil return assembly;

[0014] The output end of the transmission shaft is matched with the conical surface of the spline sleeve and fixedly connected through the transition shaft; the sun gear of the NW wheel reducer is reversely installed on the transition shaft, and the two are fixedly connected through a fixing block and a fastening bolt group. The sun gear of the tested NW wheel reducer of the present invention can be reversely assembled through a series of structures of the above-mentioned adaptive transmission device, thereby realizing independent testing of the NW wheel reducer.

[0015] Furthermore, an oil guide baffle is provided on the NW wheel-side reducer, and the oil guide hole of the oil guide baffle extends deep into the interior of the sun gear.

[0016] Furthermore, a ventilation device is provided on the NW wheel-side reducer.

[0017] Compared with the prior art, the present invention has the following advantages: 1. Aiming at the difficulty of independent testing of NW wheel-side reducer, the present invention realizes the independent loading test of the reducer of this structure on a conventional test bench by adapting the function of the transmission device. The prior art can only use the traction motor and reducer for joint testing. Due to the different parameters of the traction motor, the compatibility of the test bench control system is required to be higher, and the influence of the traction motor on the gearbox test cannot be shielded.

[0018] 2. Aiming at the problem that the input and output ends of the NW wheel reducer are located on the same side, the present invention realizes the reverse installation of the sun gear by using the adapter flange set of the adapter transmission device, thus meeting the towing test requirements of the NW wheel reducer with the input and output on the same side. However, the existing technology does not have the ability to realize this function.

[0019] 3. In order to better simulate the operating conditions of the NW wheel-side reducer, the present invention adopts a speed increasing device, and a wider range of speed adjustment can be obtained by adjusting the gear parameters of the speed increasing device. The existing technology can only adjust the speed in a smaller range.

[0020] 4. The present invention can complete the loading test of the NW wheel-side reducer when it leaves the factory, without the need to perform the loading test simultaneously with the traction motor, which can effectively avoid the problem of unclear separation of the reducer and the traction motor. The prior art can only perform the loading test of the traction motor and the reducer simultaneously, and cannot clearly distinguish the problems of the traction motor and the reducer, resulting in a great waste of time, manpower and material costs.

[0021] 5. The present invention has a simple structure, high adaptability to different machine models, is reusable, and has low procurement and manufacturing costs.

[0022] 6. The present invention is equipped with additional measuring elements and control systems, which can detect the temperature of each bearing of the tested NW wheel-side reducer and the test fixture, oil temperature, vibration, lubrication effect, sealing effect, whether the gear meshing meets the requirements, and whether the gear meshing meets the standards. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0024] Figure 1 It is the front view of the present invention.

[0025] Figure 2 It is a cross-sectional view of the torque transmission device of the present invention.

[0026] Figure 3 It is a cross-sectional view of the adapter transmission device of the present invention.

[0027] Figure 4 It is an enlarged view of the adapter transmission device of the present invention.

[0028] Figure 5 It is a three-dimensional schematic diagram of the present invention.

[0029] In the figure: 1-main test motor, 2-accompanying test motor, 3-torque speed monitoring device, 4-speed-increasing gearbox, 5-speed-increasing gearbox bracket, 6-support seat, 7-support cover, 8-support seat bolt group, 9-base, 10-base bolt group, 11-first torque transmission flange, 12-second torque transmission flange, 13-flexible pin, 14-first torque transmission flange bolt group, 15-second torque transmission flange bolt group, 16-traction motor frame, 17-universal joint, 18-shaft sleeve, 19-locking plate, 20-transmission shaft, 21-axle box, 22-first support bearing, 23 -second support bearing, 24-first pressure cover, 25-second pressure cover, 26-first seal, 27-second seal, 28-first adapter flange, 29-second adapter flange, 30-first adapter flange bolt group, 31-second adapter flange bolt group, 32-third adapter flange bolt group, 33-sealing housing, 34-spline sleeve, 35-transition shaft, 36-fixing block, 37-fastening bolt group, 38-oil return assembly, 39-oil guide baffle, 40-ventilation device, 41-tested NW wheel-side reducer, 42-sun gear, 43-lubrication system. DETAILED DESCRIPTION

[0030] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. 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.

[0032] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0033] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, the numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0034] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0035] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below their position devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0036] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0037] like Figures 1 to 5 As shown, the embodiment of the present invention discloses a test device for independent testing of NW wheel-side reducers, including two tested NW wheel-side reducers 41, hereinafter referred to as NW wheel-side reducers, and two sets of test devices, which are respectively connected to the corresponding tested NW wheel-side reducers, and the test device includes:

[0038] Speed ​​increasing device, used to realize torque speed adjustment of the adaptable transmission device and NW wheel reducer,

[0039] Support device, used to support the adaptor transmission device to ensure stability during the test.

[0040] Torque transmission device, used to connect two NW wheel reducers, the output ends of the two NW wheel reducers are set oppositely,

[0041] The adaptor transmission device is used to connect the speed increasing device with the NW wheel reducer, and is provided with supporting components for conducting oil sealing and lubrication experiments on the NW wheel reducer.

[0042] Specifically, the speed increasing device includes a motor, a torque speed monitoring device and a speed increasing gearbox, wherein the motor of one set of test devices is the main test motor, and the motor of the other set of test devices is the companion test motor. The main test motor 1 and the companion test motor 2 are respectively connected to the two sets of torque speed monitoring devices 3, and are positioned through bearings. The torque speed monitoring device is connected to the speed increasing gearbox 4 through a coupling, and the speed increasing gearbox is installed on the speed increasing gearbox bracket 5, and the speed increasing gearbox bracket is fixed on the test platform. The output end of the speed increasing gearbox is connected to the universal joint shaft of the adapter transmission device. During the actual experiment, the active motor drives, and the passive motor acts as a power generation load and rotates synchronously. Of course, the main test motor 1 and the companion test motor 2 are provided with corresponding components to be assembled at the same height as the speed increasing gearbox 4.

[0043] The supporting device includes a supporting seat 6, a supporting cover 7, a supporting seat bolt group 8, a base 9 and a base bolt group 10. The NW wheel-side reducer is installed on the supporting seat, on which a supporting cover is arranged. The supporting seat and the supporting cover are connected by a supporting seat bolt group. The supporting seat is installed on the base, and the base is fixed on the test platform. The supporting seat and the base are connected and fixed by a base bolt group.

[0044] The torque transmission device includes a first torque transmission flange 11 and a second torque transmission flange 12. The first torque transmission flange includes a plurality of large-diameter holes and a plurality of small-diameter holes. The small-diameter holes of the first torque transmission flange are connected to the output end of the NW wheel-side reducer through a first torque transmission flange bolt group 14. The large-diameter holes of the first torque transmission flange are connected to the second torque transmission flange through a second torque transmission flange bolt group 15. The second torque transmission flanges of the two test devices are connected through a flexible pin 13.

[0045] In this embodiment, a traction motor frame 16 is also included, which is the output end of the NW wheel-side reducer mentioned above. It is used to replace the traction motor in the product to ensure the structural integrity of the tested NW wheel-side reducer. A sealing ring is set at the front end of the frame to ensure overall sealing.

[0046] The adapting transmission device comprises a universal joint shaft, a sleeve, a locking plate, a transmission shaft, an axle box, a first support bearing, a second support bearing, a first gland, a second gland, a first seal, a second seal, a first adapting flange, a second adapting flange, a first adapting flange bolt group, a second adapting flange bolt group, a third adapting flange bolt group, a sealing housing, a spline sleeve, a transition shaft, a fixing block, a fastening bolt group and an oil return assembly.

[0047] One end of the universal joint 17 is connected to the speed increasing device, and the other end is connected to the shaft sleeve 18. The shaft sleeve is installed on the transmission shaft 20 and fixedly connected by the locking plate 19. The transmission shaft 20 is installed inside the axle box 21 and supported for rotation by the first support bearing 22 and the second support bearing 23 installed on the axle box 21. The two ends of the axle box 21 are respectively provided with a first pressure cover 24 and a second pressure cover 25. The first pressure cover 24 and the second pressure cover 25 are respectively installed with a first seal 26 and a second seal 27. The first support bearing 22, the second support bearing 23 and the speed increasing device are cooled and lubricated by the lubrication system 43.

[0048] The shell of the axle box 21 is installed on the small end face of the first adapter flange 28 and is fixedly connected by the first adapter flange bolt group 30. The large end face of the first adapter flange 28 is installed on the second adapter flange 29. The second adapter flange 29 is installed in the support device. The NW wheel-side reducer is installed on the second adapter flange 29. The first adapter flange 28, the second adapter flange 29 and the support device as a whole are fixedly connected by the second adapter flange bolt group 31. The second adapter flange 29 and the tested NW wheel-side reducer 41 are fixedly connected by the third adapter flange bolt group 32.

[0049] The sealing housing 33 is installed on the tested NW wheel-side reducer, and the other end is sleeved on the outside of the second gland 25. The lower part of the sealing housing 33 is provided with an oil return assembly 38;

[0050] The output end of the transmission shaft 20 cooperates with the conical surface of the spline sleeve 34 and is fixedly connected via the transition shaft 35 ; the sun gear 42 is reversely mounted on the transition shaft 35 , and the two are fixedly connected via the fixing block 36 and the fastening bolt group 37 .

[0051] An oil guide baffle 39 is provided on the NW wheel-side reducer, and the oil guide hole of the oil guide baffle 39 extends deep into the interior of the sun gear 42 .

[0052] The NW wheel-side reducer is provided with a ventilation device 40 for ensuring the pressure balance inside and outside the tested NW wheel-side reducer.

[0053] The test bench can detect the additional measuring elements and control system of the NW wheel reducer and the test fixture, including the bearing temperature, oil temperature, vibration, lubrication effect, sealing effect, and gear meshing compliance.

[0054] The present invention enables the NW wheel reducer to independently perform a loading test on a conventional test bench, can simulate the actual working conditions of the NW wheel reducer, and inspect items such as temperature, vibration, lubrication, sealing, gear meshing, etc., thereby improving the reliability and safety of the NW wheel reducer and reducing the loading test cost.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A test device for independent testing of NW wheel reducers, characterized in that: The test device includes two NW wheel reducers to be tested, and two sets of test devices are respectively connected to the corresponding NW wheel reducers to be tested. The test device includes: Speed ​​increasing device, supporting device, torque transmission device and adapting transmission device; The speed increasing device comprises a motor, a torque speed monitoring device and a speed increasing gearbox, wherein the motor of one set of test devices is a main test motor, and the motor of the other set of test devices is a companion test motor, the main test motor and the companion test motor are respectively connected to the two sets of torque speed monitoring devices, and are positioned through bearings, the torque speed monitoring device is connected to the speed increasing gearbox through a coupling, the speed increasing gearbox is installed on the speed increasing gearbox bracket, the speed increasing gearbox bracket is fixed on the test platform, and the output end of the speed increasing gearbox is connected to the universal joint shaft of the matching transmission device; The support device includes a support seat, a support cover, a support seat bolt group, a base and a base bolt group. The NW wheel-side reducer is installed on the support seat, a support cover is arranged on the support seat, the support seat and the support cover are connected by a support seat bolt group, the support seat is installed on the base, the base is fixed on the test platform, and the support seat and the base are connected and fixed by the base bolt group; The torque transmission device comprises a first torque transmission flange and a second torque transmission flange, the first torque transmission flange comprises a plurality of large diameter holes and a plurality of small diameter holes, the small diameter holes of the first torque transmission flange are connected to the output end of the NW wheel-side reducer via a first torque transmission flange bolt group, the large diameter holes of the first torque transmission flange are connected to the second torque transmission flange via a second torque transmission flange bolt group, and the second torque transmission flanges of the two test devices are connected via a flexible pin; The adapting transmission device comprises a universal joint shaft, a sleeve, a locking plate, a transmission shaft, an axle box, a first support bearing, a second support bearing, a first gland, a second gland, a first seal, a second seal, a first adapting flange, a second adapting flange, a first adapting flange bolt group, a second adapting flange bolt group, a third adapting flange bolt group, a sealing housing, a spline sleeve, a transition shaft, a fixing block, a fastening bolt group and an oil return assembly. One end of the universal joint is connected to the speed increasing device, and the other end is connected to the shaft sleeve, the shaft sleeve is installed on the transmission shaft and fixedly connected by a locking disk, the transmission shaft is installed inside the axle box, and is supported for rotation by a first support bearing and a second support bearing installed on the axle box, and a first gland and a second gland are respectively provided at both ends of the axle box, and a first seal and a second seal are respectively installed inside the first gland and the second gland, and the first support bearing, the second support bearing and the above-mentioned speed increasing device are cooled and lubricated by a lubrication system; The shell of the axle box is installed on the small end face of the first adapter flange and is fixedly connected by the first adapter flange bolt group. The large end face of the first adapter flange is installed on the second adapter flange. The second adapter flange is installed in the support device. The NW wheel-side reducer is installed on the second adapter flange. The first adapter flange, the second adapter flange and the support device are fixedly connected as a whole by the second adapter flange bolt group. The second adapter flange and the NW wheel-side reducer are fixedly connected by the third adapter flange bolt group. The sealing housing is installed on the tested NW wheel-side reducer, and the other end is sleeved on the outside of the second gland. The lower part of the sealing housing is provided with an oil return assembly; The output end of the transmission shaft cooperates with the conical surface of the spline sleeve and is fixedly connected through a transition shaft; the sun gear of the NW wheel-end reducer is reversely mounted on the transition shaft, and the two are fixedly connected through a fixing block and a tightening bolt group.

2. The test device for independent testing of NW wheel reducer according to claim 1 is characterized in that: The NW wheel-side reducer is provided with an oil guide baffle, and the oil guide hole of the oil guide baffle penetrates into the interior of the sun gear.

3. The test device for independent testing of NW wheel reducer according to claim 1, characterized in that: The NW wheel reducer is equipped with a ventilation device.

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