CN113532854A - Axial loading testing device for ball screw pair - Google Patents
Axial loading testing device for ball screw pair Download PDFInfo
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- CN113532854A CN113532854A CN202110714594.2A CN202110714594A CN113532854A CN 113532854 A CN113532854 A CN 113532854A CN 202110714594 A CN202110714594 A CN 202110714594A CN 113532854 A CN113532854 A CN 113532854A
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- screw pair
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- 238000012360 testing method Methods 0.000 title claims abstract description 25
- 230000005540 biological transmission Effects 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 3
- 238000011161 development Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/02—Gearings; Transmission mechanisms
- G01M13/027—Test-benches with force-applying means, e.g. loading of drive shafts along several directions
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- General Physics & Mathematics (AREA)
- Transmission Devices (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses an axial loading test device for a ball screw shaft, which comprises: a base and a top plate opposite thereto; the connecting shaft is positioned between the base and the top plate, and one end of the connecting shaft is embedded into the top plate; the limiting plate is arranged on the base and fixedly connected with the base so as to realize the circumferential fixing function of the connecting shaft and ensure the circumferential position of the ball screw pair; the transmission pin is fixedly arranged on the ball screw pair so as to realize the axial fixing function of the connecting shaft; the ball screw pair is connected with the top plate through the connecting shaft, and the ball screw pair, the connecting shaft and the top plate are coaxially arranged, so that the effective transmission of pressure is realized; one end of the ball screw pair is embedded into the base and is connected with the base in a matched manner through the groove; the other end is arranged inside the connecting shaft and embedded inside the top plate. The axial loading test device realizes the pressure application to the weak point of the ball screw pair, ensures the axial fixation and the circumferential fixation of the ball screw pair in the force application process, and is safe and reliable.
Description
Technical Field
The invention relates to the technical field of test devices, in particular to an axial loading test device for a ball screw auxiliary shaft.
Background
With the development of the electric transmission technology, the ball screw pair transmission gradually becomes the development direction of the mainstream transmission mechanism due to the advantages of simple structure, high transmission efficiency, high transmission precision, high reliability and the like, and is widely applied in the aerospace field.
With the continuous development of aerospace technology in China, aerospace vehicles have higher performance requirements on the volume, the quality, the static and dynamic response state, the bearing capacity, the reliability and the like of the ball screw pair. The reliability and stability of the transmission of the ball screw pair are directly related to the normal operation of the spacecraft, so that very high requirements are provided for the early-stage simulation loading test of the ball screw pair.
The aerospace working condition is mainly characterized in that: short-time high overload, limited working life, high reliability, and can work normally under the condition of no lubrication for a certain time. Therefore, how to provide an axial loading testing device of a ball screw pair aiming at special working conditions of spaceflight to realize axial loading becomes a problem which needs to be solved urgently at present.
Disclosure of Invention
The invention aims to provide an axial loading testing device of a ball screw pair, which realizes the functions of axial fixing and circumferential fixing of a connecting shaft in the loading process, and effectively applies pressure to the weak points of the ball screw pair and a transmission pin.
In order to achieve the above object, the present invention provides a device for testing axial loading of a ball screw countershaft, comprising: a base and a top plate opposite thereto; the connecting shaft is positioned between the base and the top plate, and one end of the connecting shaft is embedded into the top plate; the limiting plate is arranged on the base and is fixedly connected with the base so as to realize the circumferential fixing function of the connecting shaft; the transmission pin is fixedly arranged on the ball screw pair so as to realize the axial fixing function of the connecting shaft; the ball screw pair is connected with the top plate through a connecting shaft, and the ball screw pair, the connecting shaft and the top plate are coaxially arranged, so that the effective transmission of pressure is realized; one end of the ball screw pair is embedded into the base and is connected with the base in a matched manner through a groove; the other end is placed inside the connecting shaft and embedded inside the top plate.
According to the invention, the limiting plate is of an L-shaped structure, one end face of the limiting plate is fixed on the base through a screw, and the other end face of the limiting plate is in contact with the connecting shaft to prevent the connecting shaft from moving circumferentially.
According to the invention, the driving pin is fixedly connected with the ball screw pair through a screw, and the driving pin is arranged near the connecting shaft so as to ensure the axial fixation of the connecting shaft through the driving pin.
According to the invention, the ball screw pair is connected with the base in a matching way through the groove.
According to the invention, the top plate, the connecting shaft and the ball screw pair are coaxially arranged, so that the pressure from the top plate to the connecting shaft is realized until the weak point of the ball screw pair and the transmission pin is reached.
The invention has the beneficial effects that:
the invention provides a ball screw pair axial loading testing device, which solves the problems of testing limitation, safety, reliability and the like caused by factors such as inconvenient direct stress, axial pressure loading stability and the like due to weak points of a ball screw and a transmission pin, can realize axial loading on the ball screw under the condition of keeping connection axial and circumferential fixation, is an important technical realization way for ground function testing and performance testing, provides technical support for design and manufacture of real products, greatly reduces the cost, manpower and material resources of research and development design and test, and has great practical application value.
Drawings
Fig. 1 schematically shows a structural schematic diagram of a ball screw secondary axial loading test device.
Fig. 2 schematically shows a cross-sectional structure view of the ball screw counter axial load test apparatus.
Detailed Description
The construction and use of the invention will be further explained with reference to the drawings and specific embodiments. It is to be understood that the following examples are only illustrative and explanatory of the present invention and should not be construed as limiting the scope of the present invention. All the technologies realized based on the above-mentioned contents of the present invention are covered in the protection scope of the present invention.
Referring to fig. 1-2, the invention provides an axial loading test device for a ball screw pair, which mainly comprises a base 10, a top plate 30 opposite to the base, a connecting shaft 40, a driving pin 50, a limiting plate 60 and the like. The connecting shaft 40 is located between the base 10 and the top plate 30, and one end of the connecting shaft 40 is embedded in the top plate 30. The limiting plate 60 is disposed on the base 10 and fixedly connected to the base 10 to achieve the circumferential fixing function of the connecting shaft 40.
During testing, one end of the ball screw assembly 20 is embedded into the base 10 and is connected with the base 10 in a groove matching mode, and the other end of the ball screw assembly is placed inside the connecting shaft 40 and embedded into the top plate 30. The ball screw pair 20 is connected with the base 10 in a groove matching manner, so that the axial positioning function of the ball screw pair 20 is realized, and the axial position of the ball screw pair is ensured. The ball screw pair 20 is connected with the top plate 30 through the connecting shaft 40, that is, the ball screw pair 20, the connecting shaft 40 and the top plate 30 are coaxially installed, so that effective transmission of pressure is realized. Preferably, the ball screw assembly 20 is connected with the base 10 in a matching manner through a groove, and the groove connection is beneficial to reducing the assembly complexity and ensuring the axial position precision.
As shown in fig. 2, the driving pin 50 is fixedly mounted on the ball screw assembly 20, for example, the driving pin 50 is mounted on the ball screw assembly 20 by a screw. The driving pin 50 is arranged near the connecting shaft 40 to ensure axial fixation of the connecting shaft 40 by the driving pin 50.
Preferably, the limiting plate 60 is fixedly connected with the base 10 through a screw, and the limiting plate 60 is disposed near the connecting shaft 40 to ensure circumferential fixation of the connecting shaft 40 through the limiting plate 60, so as to further ensure the circumferential position of the ball screw assembly 20.
Specifically, the limiting plate 60 may have an L-shaped structure, one end surface of which is fixed to the base 10 by a screw, and the other end surface of which is in contact with the connecting shaft 40 to prevent the connecting shaft 40 from moving circumferentially.
By adopting the axial loading test device, after the ball screw pair 20 is installed from bottom to top, the axial loading device of the ball screw pair is placed on a vertical pressure table, the pressure is transmitted to the connecting shaft 40 from the top plate 30, and is transmitted to the ball screw pair 20 and the transmission pin 50 from the connecting shaft 40. The axial loading testing device of the invention realizes the application of pressure to the weak point of the ball screw pair 20, ensures the axial fixation and circumferential fixation of the ball screw pair 20 in the force application process, and is safe and reliable.
The embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiment. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A device for testing axial loading of a ball screw countershaft, comprising:
a base (10) and a top plate (30) opposite thereto;
the connecting shaft (40) is positioned between the base (10) and the top plate (30), and one end of the connecting shaft (40) is embedded into the top plate (30);
the limiting plate (60) is arranged on the base (10) and is fixedly connected with the base (10) to realize the circumferential fixing function of the connecting shaft (40), so that the circumferential position of the ball screw pair (20) is ensured;
the transmission pin (50) is fixedly arranged on the ball screw pair (20) so as to axially fix the connecting shaft (40);
the ball screw pair (20) is connected with the top plate (30) through a connecting shaft (40), and the ball screw pair (20), the connecting shaft (40) and the top plate (30) are coaxially arranged, so that the effective transmission of pressure is realized;
one end of the ball screw pair (20) is embedded into the base (10) and is connected with the base (10) in a matched mode through a groove; the other end is placed inside the connecting shaft (40) and embedded inside the top plate (30).
2. The ball screw counter axial load testing device of claim 1,
the limiting plate (60) is fixedly connected with the base (10) through a screw, and the limiting plate (60) is arranged near the connecting shaft (40) so as to ensure that the connecting shaft (40) is circumferentially fixed through the limiting plate (60).
3. The device for testing axial loading of the ball screw secondary shaft according to claim 2, wherein the limiting plate (60) is of an L-shaped structure, one end surface of the limiting plate is fixed on the base (10) through a screw, and the other end surface of the limiting plate is in contact with the connecting shaft (40) to prevent the connecting shaft (40) from moving circumferentially.
4. Device according to claim 1, characterized in that said driving pin (50) is mounted on the ball screw pair (20) by means of screws, and in that said driving pin (50) is arranged in proximity to the connection shaft (40) to ensure the axial fixation of the connection shaft (40) by means of the driving pin (50).
5. The ball screw secondary axial loading test device of claim 1, wherein the ball screw pair (20) is in fit connection with the base (10) through a groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110714594.2A CN113532854B (en) | 2021-06-25 | 2021-06-25 | Axial loading testing device for ball screw pair |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110714594.2A CN113532854B (en) | 2021-06-25 | 2021-06-25 | Axial loading testing device for ball screw pair |
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| CN113532854A true CN113532854A (en) | 2021-10-22 |
| CN113532854B CN113532854B (en) | 2024-04-26 |
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2021
- 2021-06-25 CN CN202110714594.2A patent/CN113532854B/en active Active
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