CN212513957U - Shaft rotation bending fatigue test bench - Google Patents
Shaft rotation bending fatigue test bench Download PDFInfo
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- CN212513957U CN212513957U CN202021193447.2U CN202021193447U CN212513957U CN 212513957 U CN212513957 U CN 212513957U CN 202021193447 U CN202021193447 U CN 202021193447U CN 212513957 U CN212513957 U CN 212513957U
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Abstract
The utility model relates to a technical field of material fatigue performance test, the utility model provides a tired testboard of axle rotation bending, which comprises a motor, the transmission main shaft, the bearing box, the mobile station, the hydraulic stem, a slide rail, the locating piece, the transmission main shaft sets up in the bearing box and both ends all stretch out outside the bearing box, the one end of transmission main shaft is used for connecting motor and the other end and is used for connecting the sample axle, the hydraulic stem is used for being spacing on the mobile station to sample axle loading radial load and its quilt, the mobile station is used for adjusting the position of hydraulic stem and its and slide rail sliding connection, the locating piece is used for locking the position of mobile station on the slide rail. When the hydraulic rod loads radial load on the rotating sample shaft, the position of the moving platform is locked by the positioning block, so that the situation that the position applied by the radial load is unstable due to the displacement of the moving platform and the hydraulic rod is avoided, and abnormal abrasion of a transmission main shaft and a bearing in the test bed caused by overlarge rotation angle of the sample shaft on a vertical plane is avoided.
Description
Technical Field
The utility model relates to a technical field of material fatigue performance test more exactly relates to a shaft rotation bending fatigue testboard.
Background
The semi-floating half shaft for various cars has the advantages that the acting force of the road surface to wheels is pressed on the half shaft, and the half shaft can simultaneously bear vertical force, lateral force and bending moment generated jointly besides transmitting torque. In addition, as the motor shaft of the axial flow fan is provided with the impeller with larger mass, the motor shaft is required to bear large radial load, and the motor shaft is also required to bear bending moment generated by the radial load in the process of driving the impeller to rotate. It is necessary to perform fatigue resistance test on shafts which are rotating and also bear bending moment, and the shafts are usually tested according to the working environment for corresponding running time under different rotating speeds and different radial loads to obtain performance curve data of the shafts.
The current test bed fixes the applying component of the radial load by using a lead screw, during the process of carrying out the rotating bending fatigue resistance test on shafts, a sample shaft often generates strong reaction on the applying component of the radial load, and the lead screw can not lock the applying component of the radial load, so that the applying position of the radial load is unstable. Once the radial load applying component is displaced to cause the rotation angle of the sample shaft on the vertical plane to be too large, the damage to the transmission main shaft and the bearing in the test bed is large, the actual service life of the sample shaft cannot be accurately measured, the transmission main shaft or the bearing can be damaged when the sample shaft is tested once in the initial stage, or the measured service life of the sample shaft is far shorter than the actual service life of the sample shaft.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide an axle rotating bending fatigue test platform, can accurately survey the rotating bending fatigue life who gets axle class, can not cause unoperated state's injury to transmission main shaft and bearing in the test bench moreover.
The technical solution of the utility model is, a axle rotation bending fatigue testboard is provided, which comprises a motor, the transmission main shaft, the bearing box, the mobile station, the hydraulic stem, a slide rail, the locating piece, the transmission main shaft sets up in the bearing box and both ends all stretch out outside the bearing box, the one end of transmission main shaft is used for connecting motor and the other end and is used for connecting the sample axle, the hydraulic stem is used for being spacing on the mobile station to sample axle loading radial load and its quilt, the mobile station is used for adjusting the position of hydraulic stem and its and slide rail sliding connection, the locating piece is used for locking the position of mobile station on the slide rail.
Compared with the prior art, the utility model discloses a rotatory crooked tired testboard of axle has following advantage: when the hydraulic rod loads radial load on the sample shaft, the position of the moving platform is locked by the positioning block, so that the situation that the position applied by the radial load is unstable due to the displacement of the moving platform and the hydraulic rod is avoided, and abnormal abrasion of a transmission main shaft and a bearing in the test bed due to the fact that the rotation angle of the sample shaft on a vertical plane is too large is avoided.
Preferably, the transmission main shaft is provided with a main shaft flange for connecting the sample shaft and driving the sample shaft to rotate by the transmission main shaft. By adopting the structure, the sample shaft is conveniently and fixedly connected to the transmission main shaft.
Preferably, the hydraulic rod is limited below the mobile station, and a loading hole for the hydraulic rod to pass through is formed in the middle of the mobile station. By adopting the structure, the loading position of the hydraulic rod to the sample shaft can be conveniently and accurately controlled.
Preferably, a sliding block is arranged on the lower bottom surface of the mobile station and is in sliding connection with the sliding rail. With this structure, the mobile station can be stably adjusted in position.
Preferably, the positioning block is slidably connected with the slide rail. By adopting the structure, the positioning block can fix the mobile station at any position on the slide rail.
Preferably, the test device further comprises a load bearing sleeve, a test sample bearing connected with the test sample shaft is arranged in the load bearing sleeve, and the top of the hydraulic rod is abutted against the load bearing sleeve so as to load radial load to the test sample shaft. By adopting the structure, the rotation of the sample shaft is not influenced while the radial load is loaded on the sample shaft.
Preferably, the top end of the hydraulic rod is provided with a limiting groove for limiting the load bearing sleeve. By adopting the structure, the hydraulic rod is not easy to generate relative displacement with the limit load shaft, and the loading position of the sample shaft is stable.
Preferably, a first bearing, a second bearing and a bushing are arranged in the bearing box, the transmission main shaft is respectively connected with the first bearing and the second bearing, inner end faces of the first bearing and the second bearing are respectively abutted against two end faces of the bushing, a step face abutted against an outer end face of the second bearing is arranged on the transmission main shaft, and a pair of locking nuts abutted against an outer end face of the first bearing is further arranged on the transmission main shaft. By adopting the structure, the first bearing is limited between the locking nut and the bushing, and the second bearing is limited between the bushing and the step surface of the transmission main shaft, so that the first bearing and the second bearing cannot axially move on the transmission main shaft, and the abrasion among the transmission main shaft, the first bearing and the second bearing is reduced.
Drawings
Fig. 1 is the structure schematic diagram of the shaft rotation bending fatigue test bench of the present invention.
Fig. 2 is a front view of fig. 1.
Fig. 3 is a top view of fig. 1.
FIG. 4 is a schematic cross-sectional view of a bearing housing of a prior art shaft rotational bending fatigue test rig.
Fig. 5 is a schematic sectional view of the bearing housing of the shaft rotation bending fatigue test table of the present invention.
As shown in the figure: 1. the device comprises a transmission main shaft 1-1, a main shaft flange 1-2, a motor connecting end 2, a bearing box 3, a first bearing 4, a second bearing 5, a first bearing cover plate 6, a second bearing cover plate 7, a bushing 8, a first locking nut 9, a second locking nut 10, a sample shaft 10-1, a sample shaft flange 11, a load bearing sleeve 11-1, a sample bearing 12, a sliding rail 13, a moving platform 13-1, a sliding block 14, a hydraulic rod 14-1, a limiting groove 15 and a positioning block.
Detailed Description
For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that the detailed description is merely illustrative of exemplary embodiments of the present application and does not limit the scope of the present application in any way. Like reference numerals refer to like elements throughout the specification.
In the drawings, the thickness, size, and shape of an object have been slightly exaggerated for convenience of explanation. The figures are purely diagrammatic and not drawn to scale.
It will be further understood that the terms "comprises," "comprising," "includes," "including," and/or "including," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Further, when a statement such as "… at least one" appears after the list of listed features, the entire listed feature is modified rather than modifying individual elements in the list.
As shown in fig. 1 to fig. 3, the shaft rotation bending fatigue test bench of the present invention includes a transmission main shaft 1, a bearing box 2, a mobile station 13, a hydraulic rod 14, a load bearing sleeve 11, two parallel sliding rails 12, and two positioning blocks 15. The transmission main shaft 1 is arranged in the bearing box 2, two ends of the transmission main shaft extend out of the bearing box 2, one end of the transmission main shaft 1 is provided with a motor connecting end 1-2, the motor connecting end 1-2 is used for being connected with a motor to enable the transmission main shaft 1 to be driven by the motor to rotate, the other end of the transmission main shaft 1 is provided with a main shaft flange 1-1, the main shaft flange 1-1 is used for being connected with a sample shaft 10 to enable the sample shaft 10 to be driven by the transmission main shaft 1 to rotate, and the sample shaft 10 is provided with a sample shaft flange 10-1 connected with the main shaft. The two parallel sliding rails 12 are connected with the bottom end of the bearing box 2, the sliding rails 12 are connected with a mobile station 13, two sides of the lower bottom surface of the mobile station 13 are respectively provided with 2 sliding blocks 13-1, the sliding blocks 13-1 are connected with the sliding rails 12 in a sliding mode, the middle of the mobile station 13 is further provided with a loading hole, a hydraulic rod 14 is limited at a position below the mobile station 13 and right opposite to the loading hole, the hydraulic rod 14 penetrates through the loading hole to load vertical force, namely radial load, on the sample shaft 10 during loading, the mobile station 13 is further provided with two positioning blocks 15, the two positioning blocks 15 are respectively connected with the two sliding rails 12 in a sliding mode, the positioning blocks 15 are used for locking the position of the mobile station 13, and the position instability caused by the displacement of the mobile station 13 and the hydraulic rod 14 when the hydraulic rod 14 loads the radial load on. When the hydraulic rod 14 loads radial load on the sample shaft 10, the sample shaft 10 is installed in the load bearing sleeve 11, the sample bearing 11-1 is arranged in the load bearing sleeve 11, the sample shaft 10 is connected with the sample bearing 11-1, the top end of the hydraulic rod 14 is provided with a limiting groove 14-1, and the load bearing sleeve 11 is limited in the limiting groove 14-1. When the shaft rotating bending fatigue test is carried out, the sample shaft 10 drives the sample bearing 11-1 to rotate in the load bearing sleeve 11 under the driving of the transmission main shaft 1, and meanwhile, the hydraulic rod 14 applies radial load to the sample shaft 10 through the load bearing sleeve 11.
As shown in fig. 4, the first bearing 3 and the second bearing 4 are respectively arranged at the head end and the tail end in the bearing box 2 in the prior art, the first bearing cover plate 5 and the second bearing cover plate 6 are respectively arranged at the two sides of the bearing box 2 to encapsulate the first bearing 3 and the second bearing 4 in the bearing box 2, the transmission main shaft 1 is respectively connected with the first bearing 3 and the second bearing 4, a plurality of step surfaces are arranged on the transmission main shaft 1, so that the diameter of the transmission main shaft 1 is gradually reduced, and the first bearing 3 and the second bearing 4 do not have a limiting device in the bearing box 2. Because transmission main shaft 1 upwards raises an angle gradually along with radial load loading, lead to the testboard operation back, transmission main shaft 1 drives first bearing 3 and second bearing 4 rotatory simultaneously, first bearing 3 and second bearing 4 can produce axial displacement on transmission main shaft 1 to the wearing and tearing between transmission main shaft 1 and first bearing 3, the second bearing 4 are accelerated, often when the test number of times of sample axle has not reached its life-span test's requirement, transmission main shaft 1 or first bearing 3, second bearing 4 just damaged.
As shown in fig. 5, the utility model discloses a rotatory bending fatigue test platform of axle improves bearing box 2, has increased bush 7 between first bearing 3 and second bearing 4, and first bearing 3 is dorsad and increases two lock nuts in one side of bush 7, is first lock nut 8 and second lock nut 9 respectively, and second bearing 4 is dorsad and a step face on one side and the transmission main shaft 1 of bush 7 inconsistent. Therefore, the first bearing 3 and the second bearing 4 are firmly fixed on the shaft section of the transmission main shaft 1 in the bearing box 2 by the locking nut, the bushing 7 and the step surface of the transmission main shaft 1, and when the transmission main shaft 1 rotates at a high speed, the first bearing 3 and the second bearing 4 cannot axially move on the transmission main shaft 1, so that the abrasion among the transmission main shaft 1, the first bearing 3 and the second bearing 4 is reduced. The current test protocol is to run the test shaft for life 1000 ten thousand cycles after loading the test shaft with a radial load. See from the operation result, adopt the technical scheme of the utility model afterwards, main shaft or bearing damage condition do not appear after the testboard uses more than a year again, and the operation is stable.
The above are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention; the scope of the appended claims should be accorded the broadest interpretation so as to encompass all such modifications and equivalent arrangements as is within the spirit and scope of the present invention.
Claims (8)
1. The utility model provides a rotatory bending fatigue test platform of axle, a serial communication port, including the motor, transmission main shaft (1), bearing box (2), mobile station (13), hydraulic stem (14), slide rail (12), locating piece (15), transmission main shaft (1) sets up in bearing box (2) and both ends all stretch out outside bearing box (2), the one end of transmission main shaft (1) is used for connecting motor and the other end is used for connecting sample axle (10), hydraulic stem (14) are used for sample axle (10) loading radial load and it is spacing on mobile station (13), mobile station (13) are used for adjusting the position of hydraulic stem (14) and its and slide rail (12) sliding connection, locating piece (15) are used for locking mobile station (13) the position on slide rail (12).
2. The shaft rotating bending fatigue test bench according to claim 1, characterized in that the transmission main shaft (1) is provided with a main shaft flange (1-1) for connecting the sample shaft (10) and making the sample shaft (10) rotate driven by the transmission main shaft (1).
3. The axial rotation bending fatigue test bench according to claim 1, characterized in that the hydraulic rod (14) is limited below the moving platform (13), and a loading hole for the hydraulic rod (14) to pass through is arranged in the middle of the moving platform (13).
4. The axial rotation bending fatigue test bench according to claim 1, characterized in that a sliding block (13-1) is arranged on the lower bottom surface of the movable table (13), and the sliding block (13-1) is connected with the sliding rail (12) in a sliding manner.
5. The shaft rotation bending fatigue test bench according to claim 1, wherein the positioning block (15) is slidably connected with the slide rail (12).
6. The shaft rotating bending fatigue test bench according to claim 1, further comprising a load bearing sleeve (11), wherein a sample bearing (11-1) connected with the sample shaft (10) is arranged in the load bearing sleeve (11), and the top of the hydraulic rod (14) is abutted against the load bearing sleeve (11) so as to load a radial load on the sample shaft (10).
7. The shaft rotating bending fatigue test bench according to claim 6, characterized in that the top end of the hydraulic rod (14) is provided with a limit groove (14-1) for limiting the load bearing sleeve (11).
8. The shaft rotating bending fatigue test bench according to any one of claims 1 to 7, characterized in that a first bearing (3), a second bearing (4) and a bushing (7) are arranged in the bearing box (2), the transmission main shaft (1) is respectively connected with the first bearing (3) and the second bearing (4), inner end surfaces of the first bearing (3) and the second bearing (4) are respectively abutted against two end surfaces of the bushing (7), a step surface abutted against an outer end surface of the second bearing (4) is arranged on the transmission main shaft (1), and a pair of locking nuts abutted against an outer end surface of the first bearing (3) is further arranged on the transmission main shaft (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021193447.2U CN212513957U (en) | 2020-06-24 | 2020-06-24 | Shaft rotation bending fatigue test bench |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021193447.2U CN212513957U (en) | 2020-06-24 | 2020-06-24 | Shaft rotation bending fatigue test bench |
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| CN212513957U true CN212513957U (en) | 2021-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021193447.2U Active CN212513957U (en) | 2020-06-24 | 2020-06-24 | Shaft rotation bending fatigue test bench |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114252346A (en) * | 2021-12-07 | 2022-03-29 | 西南交通大学 | Interference fit structure rotary bending micro-motion fatigue test device |
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2020
- 2020-06-24 CN CN202021193447.2U patent/CN212513957U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114252346A (en) * | 2021-12-07 | 2022-03-29 | 西南交通大学 | Interference fit structure rotary bending micro-motion fatigue test device |
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