CN216519186U - Thrust spherical plain bearing aligning device and pressure experiment machine provided with same - Google Patents
Thrust spherical plain bearing aligning device and pressure experiment machine provided with same Download PDFInfo
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- CN216519186U CN216519186U CN202122557691.3U CN202122557691U CN216519186U CN 216519186 U CN216519186 U CN 216519186U CN 202122557691 U CN202122557691 U CN 202122557691U CN 216519186 U CN216519186 U CN 216519186U
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Abstract
The utility model discloses a thrust joint bearing aligning device and a pressure testing machine provided with the same, and relates to the technical field of material testing equipment, and the thrust joint bearing aligning device comprises a bearing seat, wherein a thrust joint bearing is arranged on the bearing seat, the thrust joint bearing is inversely arranged in the bearing seat, and a positioning pin is arranged at the thrust joint bearing; the center of the bearing seat is provided with an anti-backlash pull rod; the thrust knuckle bearing pair is connected into a whole by the anti-backlash pull rod and the positioning pin; the bottom surface of the positioning pin is connected with an upper pressure plate through a bolt, a belleville spring is connected between the upper part of the clearance elimination pull rod and the bearing seat, and the clearance elimination pull rod and the belleville spring form limited restraint on a thrust joint bearing kinematic pair; the top of the anti-backlash pull rod is connected with a nut; the thrust knuckle bearing aligning device is compact in manufacturing structure, flexible in rotation and good in interchangeability, effectively solves the problem that a pressure tester adapts to a brittle test piece compression test pressing plate, and guarantees test effect and test precision.
Description
Technical Field
The utility model relates to the technical field of material testing equipment, in particular to the technical field of a thrust knuckle bearing aligning device and a pressure testing machine provided with the thrust knuckle bearing aligning device.
Background
Compression tests of rocks, concrete, composite materials and the like are limited by material properties and sample preparation methods, the geometric shape and the overall dimension of a test piece have certain deviation, and particularly, the overall dimension, the surface flatness and the like of the test piece, the component and the model with larger dimensions cannot reach ideal conditions. When a brittle material test piece bears a pressing load, if the test piece is irregular in appearance, uneven in upper and lower surfaces and unparallel, local stress and stress concentration of the test piece are very easy to occur. Because the plastic deformation amount of the brittle material is very small, the adjustment cannot be carried out in a plastic deformation mode. The small-area and local loading often causes that the local stress of the test piece exceeds the compressive strength and local cracking or damage, thereby causing early abnormal damage of the tested piece, having large deviation of measured data and being incapable of obtaining real and accurate data such as the compressive strength and the like.
In order to realize large-area stress of a tested piece and avoid early abnormal damage caused by local stress of the test piece, a pressure testing machine is generally provided with a set of aligning device on an upper pressure plate or a lower pressure plate. When the pressure testing machine applies load to the test piece through the pressure plate, the aligning device can rotate within the range of 360 degrees, so that the pressure plate is adaptive to the bearing surface of the tested piece, the pressure plate is in large-area contact with the bearing surface of the tested piece, and the requirements of load distribution and uniform stress are basically met.
The traditional aligning device of the pressure testing machine generally adopts a spherical aligning structure and consists of a ball head pressing plate and a spherical bearing seat, the ball head pressing plate and the spherical bearing seat are both subjected to high-carbon steel integral quenching and tempering combined surface quenching treatment, and the contact surfaces of two parts are matched and ground. Because the part machining efficiency is low, the quality control difficulty is large, the spherical pair matched with grinding has the problems of poor universality, no interchange and the like, and the use effect is not very ideal. In particular, a large-tonnage compression testing machine has the defects that the processing difficulty of a ball head pressing plate and a spherical bearing seat is high, the finished spherical aligning device is inflexible to rotate, the initial friction force is high, and the testing precision, particularly the measuring precision of a small force value is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problem that a pressure testing machine adapts to a brittle test piece compression test pressing plate and a test piece, and provides a thrust knuckle bearing aligning device and a pressure testing machine provided with the same, which can reduce the part processing difficulty, effectively improve the using effect of the aligning device of the pressure testing machine and ensure the testing effect and the testing precision.
The utility model specifically adopts the following technical scheme for realizing the purpose:
a thrust knuckle bearing aligning device comprises a bearing seat, wherein a thrust knuckle bearing is arranged on the bearing seat, the thrust knuckle bearing is inversely installed in the bearing seat, and a positioning pin is installed at the thrust knuckle bearing; the center of the bearing seat is provided with an anti-backlash pull rod; the clearance eliminating pull rod and the positioning pin connect the thrust knuckle bearing pair into a whole; the bottom surface of the positioning pin is connected with an upper pressure plate through a bolt, a butterfly spring is connected between the upper part of the anti-backlash pull rod and the bearing seat, and the anti-backlash pull rod and the butterfly spring form limited restraint on a thrust knuckle bearing kinematic pair; the top of the anti-backlash pull rod is connected with a nut.
When the upper pressure plate is assembled, the upper pressure plate can flexibly and freely rotate without obvious gaps by adjusting the tightness of the nut.
Further, the thrust knuckle bearing is a self-lubricating type thrust knuckle bearing.
Self-lubricating type thrust oscillating bearing is selected for use to this application, need not annotate lubricating oil to the aligning device in the testing machine normal use, is particularly suitable for top board position installation.
Bearing parts of the joint thrust bearing are made of bearing steel, and are subjected to quenching and tempering treatment and precision machining, so that the parts and finished products are high in precision and have high hardness, strength and wear resistance; the self-lubricating thrust knuckle bearing has the advantages of high bearing capacity, low friction coefficient, flexible rotation, long service life and good interchangeability.
The utility model also provides a pressure testing machine for installing the thrust knuckle bearing aligning device, which comprises a base, wherein the base is connected with an upright post, the upright post is connected with a cross beam, the cross beam is connected with a load sensor, and the load sensor is connected with the aligning device; the base is connected with a thrust structure, and the thrust structure is connected with a lower pressing plate.
The thrust structure comprises an oil cylinder, the shell of the oil cylinder is connected to the base, and the telescopic rod of the oil cylinder is connected with the lower pressing plate.
The pressure testing machine provided with the thrust spherical plain bearing aligning device has the advantages that in the practical application process, when the compression testing is carried out on brittle materials such as rocks and concrete, the pressing plate can flexibly rotate, the angle can be automatically adjusted, the pressure testing machine can better adapt to the bearing surface of a test piece, the test piece is basically free of early abnormal damage, the test data is real and reliable, and the test success rate is high.
The technical principle is as follows: in the test process, the oil cylinder piston extends out, and the lower pressing plate and the test piece are lifted to move upwards until the test piece is contacted with the upper pressing plate arranged on the cross beam. Because the position of the cross beam is kept unchanged, the lower pressure plate and the test piece are limited to freely move upwards, the upper pressure plate applies a pressing load to the test piece, and the test piece is subjected to compression deformation (the deformation is small). For a test piece with an irregular shape and an uneven top surface, the upper pressure plate is in local contact with the test piece at the beginning, the test piece is further in contact with the upper pressure plate along with the continuous rising of the oil cylinder, the upper pressure plate can rotate along with the shape of the bearing surface of the test piece, the contact area is increased, and finally the large-area contact is basically achieved.
The upper pressing plate is in large-area contact with the test piece, the whole section of the test piece bears distributed load, the local stress concentration phenomenon is eliminated, and the test piece can not be damaged abnormally in the early stage, so that accurate and real test data can be obtained.
The utility model has the following beneficial effects:
(1) the thrust joint bearing can freely rotate in a certain range while bearing axial load, when a concrete test piece, a model and other compression tests are carried out, the upper pressing plate is contacted with the top surface of the test piece along with the movement of the oil cylinder piston, and can automatically rotate and adjust according to the condition of the top surface of the test piece, so that the upper pressing plate is kept in large-area contact with the test piece, the early abnormal damage of the test piece can be avoided, and the true bearing capacity of the test piece is obtained;
(2) the aligning device is compact in manufacturing structure, flexible in rotation and good in interchangeability, effectively solves the problem that a pressure testing machine is adaptive to a brittle test piece compression test pressing plate, and guarantees the test effect and the test precision;
(3) the thrust spherical plain bearing aligning device of the application can be used for a vertical loading system, can also be used for a horizontal loading system and loading systems in other directions, and is wide in application range.
Drawings
FIG. 1 is a schematic structural diagram of a thrust spherical plain bearing aligning device according to the present invention;
fig. 2 is a schematic structural view of a compression testing machine provided with the thrust spherical plain bearing aligning device of the present invention.
Reference numerals: the method comprises the following steps of 1-base, 2-oil cylinder, 3-lower pressing plate, 4-test piece, 5-upper pressing plate, 6-upright post, 7-aligning device, 8-load sensor, 9-cross beam, 10-bearing seat, 11-thrust joint bearing, 12-positioning pin, 13-backlash eliminating pull rod, 14-butterfly spring and 15-nut.
Detailed Description
In order to make the objects, 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 with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
As shown in fig. 1-2, the present embodiment provides a thrust spherical plain bearing aligning device, including a bearing seat 10, a thrust spherical plain bearing 11 is disposed on the bearing seat 10, the thrust spherical plain bearing 11 is inversely installed in the bearing seat 10, and a positioning pin 12 is installed at the thrust spherical plain bearing 11; the center of the bearing seat 10 is provided with an anti-backlash pull rod 13; the clearance eliminating pull rod 13 and the positioning pin 12 connect the thrust knuckle bearing 11 pair into a whole; the bottom surfaces of the positioning pins 12 are connected with an upper pressure plate 5 through bolts, a belleville spring 14 is connected between the upper part of the clearance elimination pull rod 13 and the bearing seat 10, and the clearance elimination pull rod 13 and the belleville spring 14 form limited restraint on a kinematic pair of the thrust knuckle bearing 11; the top of the anti-backlash pull rod 13 is connected with a nut 15.
During assembly, the upper press plate 5 can flexibly rotate without any obvious gap by adjusting the tightness of the nut 15.
Example 2
As shown in fig. 1 to 2, the thrust spherical plain bearing 11 of this embodiment is a self-lubricating type thrust spherical plain bearing 11 according to embodiment 1.
Self-lubricating type thrust oscillating bearing 11 is selected for use to this application, need not annotate lubricating oil to aligning device 7 in the testing machine normal use process, is particularly suitable for the installation of 5 positions of top board.
Bearing parts of the joint thrust bearing are made of bearing steel, and are subjected to quenching and tempering treatment and precision machining, so that the parts and finished products are high in precision and have high hardness, strength and wear resistance; the self-lubricating thrust oscillating bearing 11 has the advantages of large bearing capacity, low friction coefficient, flexible rotation, long service life and good interchangeability.
Example 3
As shown in fig. 1-2, the embodiment provides a pressure testing machine for installing the aligning device 7 of the thrust spherical plain bearing 11, which includes a base 1, wherein the base 1 is connected with a column 6, the column 6 is connected with a beam 9, the beam 9 is connected with a load sensor 8, and the load sensor 8 is connected with the aligning device 7; the base 1 is connected with a thrust structure, and the thrust structure is connected with a lower pressing plate 3.
Wherein, the thrust structure includes hydro-cylinder 2, and the shell of hydro-cylinder 2 is connected on the base 1, the telescopic link and the holding down plate 3 of hydro-cylinder 2 are connected.
The pressure testing machine provided with the thrust spherical plain bearing 11 aligning device 7 has the advantages that in the practical application process, when the compression testing is carried out on brittle materials such as rocks and concrete, the pressing plate can flexibly rotate, the angle can be automatically adjusted, the pressure testing machine is well suitable for the bearing surface of the test piece 4, the test piece 4 basically does not generate early abnormal damage, the test data is real and reliable, and the test success rate is high.
The technical principle is as follows: in the test process, the piston of the oil cylinder 2 extends out, and the lower pressing plate 3 and the test piece 4 are lifted to move upwards until the test piece 4 is contacted with the upper pressing plate 5 arranged on the cross beam 9. Because the position of the cross beam 9 is kept unchanged, the lower pressure plate 3 and the test piece 4 are limited to freely move upwards, the upper pressure plate 5 applies a pressing load to the test piece 4, and the test piece 4 is subjected to compression deformation (the deformation amount is small). For a test piece 4 with an irregular shape and an uneven top surface, the upper pressure plate 5 is locally contacted with the test piece 4 at the beginning, the test piece 4 is further contacted with the upper pressure plate 5 along with the continuous rising of the oil cylinder 2, the upper pressure plate 5 can rotate along with the shape of the bearing surface of the test piece 4, the contact area is increased, and finally, the large-area contact is basically achieved.
The upper pressing plate 5 is in large-area contact with the test piece 4, the whole section of the test piece 4 bears distributed load, the local stress concentration phenomenon is eliminated, and the test piece 4 cannot be damaged abnormally in the early stage, so that accurate and real test data are obtained.
Claims (4)
1. The thrust knuckle bearing aligning device is characterized by comprising a bearing seat (10), wherein a thrust knuckle bearing (11) is arranged on the bearing seat (10), the thrust knuckle bearing (11) is inversely installed in the bearing seat (10), and a positioning pin (12) is installed at the position of the thrust knuckle bearing (11); the center of the bearing seat (10) is provided with an anti-backlash pull rod (13); the clearance eliminating pull rod (13) and the positioning pin (12) connect the thrust knuckle bearing (11) pair into a whole; the bottom surfaces of the positioning pins (12) are connected with an upper pressure plate (5) through bolts, a belleville spring (14) is connected between the upper part of the anti-backlash pull rod (13) and the bearing seat (10), and the anti-backlash pull rod (13) and the belleville spring (14) form limited constraint on a kinematic pair of the thrust knuckle bearing (11); the top of the anti-backlash pull rod (13) is connected with a nut (15).
2. The spherical thrust plain bearing centering device according to claim 1, wherein the spherical thrust plain bearing (11) is a self-lubricating type spherical thrust plain bearing (11).
3. A compression testing machine for installing the self-aligning device of the thrust spherical plain bearing according to claim 1 or 2, comprising a base (1), wherein the base (1) is connected with a stand column (6), the stand column (6) is connected with a cross beam (9), the cross beam (9) is connected with a load sensor (8), and the load sensor (8) is connected with the self-aligning device (7); the base (1) is connected with a thrust structure, and the thrust structure is connected with a lower pressing plate (3).
4. The compression testing machine according to claim 3, wherein the thrust structure comprises an oil cylinder (2), the shell of the oil cylinder (2) is connected to the base (1), and the telescopic rod of the oil cylinder (2) is connected to the lower pressure plate (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122557691.3U CN216519186U (en) | 2021-10-22 | 2021-10-22 | Thrust spherical plain bearing aligning device and pressure experiment machine provided with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122557691.3U CN216519186U (en) | 2021-10-22 | 2021-10-22 | Thrust spherical plain bearing aligning device and pressure experiment machine provided with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216519186U true CN216519186U (en) | 2022-05-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122557691.3U Active CN216519186U (en) | 2021-10-22 | 2021-10-22 | Thrust spherical plain bearing aligning device and pressure experiment machine provided with same |
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| Country | Link |
|---|---|
| CN (1) | CN216519186U (en) |
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2021
- 2021-10-22 CN CN202122557691.3U patent/CN216519186U/en active Active
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