Multi-axis linkage gearbox fatigue life accelerated test bench equipment

Abstract

The utility model relates to gear box detection technical field, concretely relates to the fatigue life acceleration test bench equipment of multi -shaft linkage's gear box, including experiment table, be equipped with the through groove in the test table top, be equipped with the test assembly for detecting gear box in the test table top, the test assembly includes the spline group, the spline group is located at the through groove and can slide up and down, the spline group includes spline seat, a plurality of through -holes are equipped with in the spline seat, be equipped with the thread groove in the through -hole, every the through -hole is equipped with the spline sleeve, the size of all through -hole places the spline sleeve gradually decreases from top to bottom, spline sleeve surface one side is equipped with thread, and this thread cooperates with the thread groove in the through -hole, can make the thread separate from the thread groove through the spline sleeve rotation, makes the spline sleeve move along the through -hole axial movement to sleeve joint drive motor output shaft, through the spline seat integration a plurality of size gradient gradually reduced spline sleeve, combines the screw quick -release structure, realizes the quick adaptation different model gear box drive shaft.

Description

Technical Field

[0001] This utility model relates to the field of gearbox testing technology, and more specifically, to a multi-axis linkage gearbox fatigue life accelerated testing bench. Background Technology

[0002] A gearbox is a very common mechanical transmission device. It is a closed mechanical device that uses a combination of meshing gears to transmit power, change speed, change torque, change direction of rotation, or distribute power.

[0003] Currently, most gearbox fatigue life accelerated testing benches on the market use a single-size spline connection structure. When testing different models of gearboxes, it is necessary to frequently change the spline sleeve that matches the drive shaft, resulting in poor compatibility: the single spline structure cannot cover drive shafts of multiple specifications of gearboxes, forcing the test to be interrupted to change the tooling; low efficiency: the replacement operation involves steps such as disassembling bolts and repositioning, which takes more than 15 minutes per operation; accuracy risk: repeated disassembly and assembly can easily lead to coaxiality deviation between the spline sleeve and the drive motor shaft, affecting the accuracy of the test data.

[0004] Therefore, there is an urgent need for a test bench connection structure that can quickly adapt to multiple gearbox models to improve testing efficiency and reliability.

[0005] Therefore, there is an urgent need for multi-axis linkage gearbox fatigue life accelerated testing equipment to improve the shortcomings of existing technologies. Utility Model Content

[0006] The purpose of this invention is to provide a multi-axis linkage gearbox fatigue life accelerated testing rig, which integrates multiple spline sleeves with decreasing size gradients through a spline seat, combined with a threaded quick-release structure, to achieve rapid adaptation to different models of gearbox drive shafts, thereby solving the problems mentioned in the background art, namely:

[0007] Currently, most gearbox fatigue life accelerated testing benches on the market use a single-size spline connection structure. When testing different models of gearboxes, it is necessary to frequently replace the spline sleeve that is compatible with the drive shaft.

[0008] To achieve the above objectives, this utility model provides a multi-axis linkage gearbox fatigue life accelerated testing rig, including a testing rig with a through slot above it; and a testing component for testing the gearbox is provided above the testing rig.

[0009] The test component includes a spline assembly, which is located in the through slot and can slide up and down.

[0010] The spline assembly includes a spline seat, the spline seat having multiple through holes and threaded grooves inside the through holes;

[0011] Each of the through holes is provided with a spline sleeve, and the size of the spline sleeve at all through holes gradually decreases from top to bottom; one side of the surface of the spline sleeve is provided with a thread, which mates with the threaded groove in the through hole;

[0012] By rotating the spline sleeve, the thread can be disengaged from the thread groove, allowing the spline sleeve to move axially along the through hole to engage with the output shaft of the drive motor.

[0013] In the above technical solution, the external thread of the spline sleeve of the target size is disengaged from the internal thread groove of the spline seat through hole by rotating it. After the circumferential constraint is released, the spline assembly is pushed along the vertical direction of the through groove, so that the spline sleeve moves axially and is sleeved onto the output shaft of the drive motor. During the test, the torque of the drive motor is transmitted to the input shaft of the gearbox under test through the spline sleeve, so as to complete the rapid adaptation and fatigue life test of the gearboxes of multiple specifications.

[0014] Based on this, the support frame is fixedly supported at the far end of the through slot to form a stable test benchmark for the input shaft of the gearbox under test. After adjusting the height of the spline assembly, the support seats on both sides of the through slot are rigidly locked by inserting pins into the spline seat fixing holes. At the same time, the fixing block is inserted into the slide groove to form a vertical guide, ensuring that the spline sleeve, the gearbox input shaft, and the drive motor output shaft are precisely coaxial, and achieving zero-off-center torque transmission.

[0015] Furthermore, a support frame is fixedly connected to the upper surface of the test bench on the side of the through slot away from the drive motor, and the support frame is used to support the gear shaft to be measured.

[0016] Furthermore, support seats are fixedly connected to both sides of the through groove, and the support seats are used to fix the spline assembly after adjustment.

[0017] Furthermore, the spline seat has a fixing hole on one side and a sliding groove on the other side; one of the support seats has a pin that is inserted into the fixing hole, and the other support seat has a fixing block on its surface. The fixing block is engaged in the sliding groove so that the spline assembly can only move up and down along the experimental table.

[0018] In another technical solution, a motor frame is provided on the upper surface of the test bench, and a drive motor is fixedly connected to the motor frame. A lifting lug for easy hand-holding is fixedly connected to the upper surface of the spline seat. The spline assembly is adapted to the drive connection requirements of different models of gear shafts through multiple spline sleeves of different sizes.

[0019] In this technical solution, the motor frame provides a rigid mounting reference for the drive motor, ensuring that the spatial position of the output shaft remains constant. The operator applies force by holding the spline seat lifting lug, causing the spline assembly to slide vertically along the through groove to the target position. At this time, the target specification spline sleeve is rotated to disengage its threads from the thread groove, and the spline sleeve is pushed to axially engage with the output shaft of the drive motor. The spline sleeve assembly with size gradients is used to precisely match the drive shafts of different gearbox models, achieving an efficient adaptation mechanism.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0021] This multi-axis linkage gearbox fatigue life accelerated testing rig integrates multiple spline sleeves with decreasing size gradients through a spline seat, combined with a threaded quick-release structure, to achieve rapid adaptation to different models of gearbox drive shafts, completely solving the problems of long tooling replacement time and poor compatibility of traditional testing rigs; the spline assembly moves precisely vertically under the double limit of pin-slide groove, ensuring that the coaxiality error between the spline sleeve and the drive motor shaft is ≤0.05mm, eliminating test data distortion caused by off-center loading; with the handheld lifting lug design, a single person can safely complete the operation. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the embodiment;

[0023] Figure 2 This is a schematic diagram of the test bench structure for an embodiment;

[0024] Figure 3 This is a schematic diagram of the test component structure for an embodiment;

[0025] Figure 4 This is a schematic diagram of the spline assembly structure in an embodiment.

[0026] The meanings of the labels in the diagram are as follows:

[0027] 100. Test bench; 110. Through slot; 120. Motor frame; 130. Support base; 140. Support frame;

[0028] 200 Test component; 210 Drive motor; 220 Spline assembly; 221 Spline base; 222 Lifting lug; 223 Spline sleeve; 224 Through hole; 225 Slide groove. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] For now, please refer to Figures 1-4 As shown, this embodiment provides a multi-axis linkage gearbox fatigue life accelerated testing rig equipment, including a test bench 100, a through slot 110 above the test bench 100; and a test assembly 200 for testing the gearbox above the test bench 100.

[0031] Test component 200 includes spline assembly 220, which is located at through slot 110 and can slide up and down;

[0032] Spline assembly 220 includes spline seat 221, spline seat 221 is provided with multiple through holes 224, and threaded grooves are provided in the through holes 224;

[0033] Each through hole 224 is provided with a spline sleeve 223, and the size of the spline sleeve 223 at all through holes 224 gradually decreases from top to bottom; one side of the surface of the spline sleeve 223 is provided with a thread, which mates with the threaded groove in the through hole 224;

[0034] By rotating the spline sleeve 223, the thread can be disengaged from the thread groove, and the spline sleeve 223 can be moved axially along the through hole 224 to engage the output shaft of the drive motor 210.

[0035] During implementation, the operator first selects the corresponding spline sleeve 223 on the spline seat 221 according to the specifications of the gearbox drive shaft to be tested, with the size decreasing from top to bottom; when the spline sleeve 223 is selected, rotate the spline sleeve 223 60°-90° to disengage its external thread from the internal thread groove of the through hole 224 and release the circumferential lock.

[0036] Push the spline assembly 220 vertically along the through groove 110 to drive the unlocked spline sleeve 223 to move axially until it is fitted into the output shaft of the drive motor 210; rotate the spline sleeve 223 in the opposite direction to make its threads re-mesh with the thread groove to achieve rigid locking; the torque of the drive motor 210 is transmitted to the input shaft of the gearbox through the meshing spline teeth, while the support frame 140 lifts the output end of the gearbox to form a closed-loop load system, realizing accelerated fatigue life testing of gearboxes of various specifications.

[0037] See Figure 2 As shown, after the height of the spline assembly 220 is adjusted, the left support seat 130 of the through slot 110 is inserted into the fixing hole of the spline seat 221 through the spring pin to achieve circumferential rigid locking, and the wedge-shaped fixing block of the right support seat 130 is simultaneously inserted into the slide groove 225 of the spline seat 221 to form a vertical guiding constraint. This dual-point coordination mechanism allows the spline assembly 220 to retain only a single degree of vertical motion - the pin resists the horizontal displacement caused by the driving torque, and the design of the gap between the fixing block and the slide groove 225 ≤ 0.1mm eliminates the deflection angle, ensuring that the coaxiality error between the central axis of the spline sleeve 223 and the output shaft of the drive motor 210 is extremely low.

[0038] Figure 3In the test bench 100, the motor frame 120 rigidly fixes the drive motor 210 to the test bench 100, ensuring zero spatial offset of the output shaft. When the gearbox under test is placed on the test bench 100, its input shaft end meshes with the output shaft of the drive motor 210 through the spline sleeve 223, which is compatible with gearbox output shafts of different shaft diameters. During the test, the torque of the drive motor 210 is transmitted to the input shaft of the gearbox through the spline sleeve 223, while the support frame 140 bears the weight of the gearbox and the reaction force of the output end, forming a three-point rigid body support system of "motor frame 120-spline assembly 220-support frame 140", which completely eliminates the shaft wobble caused by the traditional cantilever structure.

[0039] Additionally, see Figure 4 As shown, the operator applies force by holding the arc-shaped lifting lug 222 on the upper surface of the spline seat 221, driving the spline assembly 220 to slide vertically along the through groove 110 to the target position. At this time, according to the specifications of the gearbox drive shaft to be tested, a spline sleeve 223 with a matching size is selected and designed with a gradient decreasing from top to bottom. The target spline sleeve 223 is rotated 60° to disengage the external thread from the internal thread groove of the through hole 224, and the spline sleeve 223 is axially pushed to engage the output shaft of the drive motor 210. After the reverse rotation is locked, the remaining unused spline sleeves 223 are kept fixed by thread engagement, forming a stable force transmission structure. The lifting lug 222 provides a force application point, making it more convenient for a single person to operate.

[0040] In this embodiment, the multi-axis linkage gearbox fatigue life accelerated testing equipment, when in use, firstly, according to the specifications of the drive shaft of the gearbox under test, the operator applies force through the lifting lugs 222 on the upper surface of the spline seat 221 to select a matching spline sleeve 223 (multiple spline sleeves 223 are arranged in a gradient decreasing from top to bottom within the through hole 224 of the spline seat 221), rotates the target spline sleeve 223 by a specific angle so that its external thread completely disengages from the internal thread groove of the through hole 224, and after releasing the circumferential constraint, pushes the spline sleeve 223 axially so that its internal spline teeth precisely engage with the external spline of the output shaft of the drive motor 210; then, rotate the spline sleeve 223 in the opposite direction to restore the thread engagement state, forming a rigid torque transmission channel. At this time, the remaining inactive spline sleeves 223 are kept stationary by thread locking, which avoids interference and provides auxiliary support. This completely replaces the traditional single-size tooling replacement mode and significantly shortens the model changeover time.

[0041] During the positioning of the spline assembly 220, the support seats 130 on both sides of the through slot 110 construct a dual constraint mechanism: the elastic pin of one support seat 130 inserts into the fixing hole of the spline seat 221 to resist the circumferential displacement caused by the alternating torque during testing; the wedge-shaped fixing block of the other support seat 130 is embedded in the sliding groove 225 of the spline seat 221, limiting the movement of the spline assembly 220 only in the vertical direction and suppressing radial runout. This dual-point cooperative positioning ensures that the central axis of the spline sleeve 223 maintains a high-precision coaxial relationship with the output shaft of the drive motor 210. At the same time, the far-end support frame 140 of the test bench 100 supports the gearbox output shaft, forming a three-point statically determinate support system together with the rigidly fixed motor frame 120—the motor frame 120 stabilizes the spatial position of the power input end, the support frame 140 balances the self-weight of the gearbox and the output reaction force, and the spline assembly 220 efficiently transmits the working torque. This architecture effectively distributes the dynamic load under high-speed rotation conditions, ensuring the stable operation of the system.

[0042] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A multi-axle linkage gearbox fatigue life accelerated test bench device, comprising a test bench (100), a through slot (110) is arranged above the test bench (100); characterized in that: The test bench (100) is equipped with a test assembly (200) for testing gearboxes; The test component (200) includes a spline group (220), which is located at the through groove (110) and can slide up and down; The spline assembly (220) includes a spline seat (221), the spline seat (221) is provided with a plurality of through holes (224), and the through holes (224) are provided with threaded grooves; Each of the through holes (224) is provided with a spline sleeve (223), and the size of the spline sleeve (223) at all the through holes (224) gradually decreases from top to bottom; one side of the surface of the spline sleeve (223) is provided with a thread, which mates with the thread groove in the through hole (224); By rotating the spline sleeve (223), the thread can be disengaged from the thread groove, and the spline sleeve (223) can be moved axially along the through hole (224) to engage the output shaft of the drive motor (210).

2. The multi-axially loaded gearbox fatigue life accelerated test stand apparatus of claim 1, wherein: The test bench (100) has a motor frame (120) on its upper surface, and the motor frame (120) is fixedly connected to the drive motor (210).

3. The multi-axially loaded gearbox fatigue life accelerated test stand apparatus of claim 1, wherein: A support frame (140) is fixedly connected to the upper surface of the test bench (100) on the side of the through groove (110) away from the drive motor (210). The support frame (140) is used to support the gear shaft to be measured.

4. The multi-axis gear box fatigue life accelerated test bed apparatus of claim 1, wherein: The through groove (110) is fixedly connected to two sides of a support base (130), which is used to fix the spline assembly (220) after adjustment.

5. The multi-axially loaded gearbox fatigue life accelerated test stand apparatus of claim 4, wherein: The spline seat (221) has a fixing hole on one side and a sliding groove (225) on the other side; one of the support seats (130) has a pin and is inserted into the fixing hole, and the other support seat (130) has a fixing block on its surface. The fixing block is engaged in the sliding groove (225) so that the spline assembly (220) can only move up and down along the experimental table.

6. The multi-axis gearbox fatigue life accelerated test bed apparatus of claim 1, wherein: The upper surface of the spline seat (221) is fixedly connected with a handle (222) for easy hand gripping.

7. The multi-axis, gear box fatigue life accelerated test stand apparatus of claim 1, wherein: The spline assembly (220) is adapted to the drive connection requirements of different types of gear shafts through multiple spline sleeves (223) of different sizes.

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