CN217384703U - Bearing rigidity test device - Google Patents

Abstract

The utility model provides a bearing rigidity test device, include the frame at least, with frame swing joint's loading part, with frame fixed connection's test bench, be used for measuring the measuring subassembly of the bearing deformation volume that awaits measuring and locate the experimental unit between test bench and the loading part. The loading component is controlled by the driving component to move. The test unit at least comprises a test shaft and a test seat, wherein a bearing mounting hole for mounting a bearing to be tested is formed in the test seat, and the bearing mounting hole can accommodate the test shaft to pass through. The measuring component is contacted with the test unit to measure the displacement of the bearing to be measured. After the test shaft, the test seat and the bearing to be tested are installed, strength detection when the shaft to be tested bears radial force or axial force can be achieved by changing the direction of force applied to the test unit by the loading part, and the test device is very convenient to use.

Description

Bearing rigidity test device

Technical Field

The utility model relates to a bearing performance test device field, concretely relates to bearing rigidity experimental apparatus.

Background

The rigidity of the bearing is an important parameter for evaluating the performance of the bearing, in a precision instrument, the rigidity of the bearing directly influences the accuracy of the instrument, and if the bearing deforms during working, the measurement accuracy of the precision instrument is greatly influenced. The rigidity of the bearing is measured by measuring the deformation of the shaft under load. However, the deformation amount of the bearing in the precision instrument is often smaller in magnitude, and the actual deformation amount of the bearing under load is difficult to measure by using a conventional measuring means, so that the test and detection result aiming at the rigidity performance of the bearing is often low in accuracy, and the designed bearing is difficult to meet the requirement of the precision instrument.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: in the prior art, a test device special for detecting the rigidity of the bearing is absent, and the deformation quantity of a shaft bearing load is difficult to measure, so that the rigidity performance of the bearing is difficult to determine through experiments.

In order to solve the technical problem, the utility model provides a technical scheme as follows:

the utility model provides a bearing rigidity test device includes at least: a frame; the loading component is movably connected with the rack, and a driving assembly for driving the loading component to move along the vertical direction is arranged in the rack; the test bed is fixedly arranged in the rack; the test unit is arranged between the test bed and the loading part and at least comprises a test shaft and a test seat, and a bearing mounting hole is formed in the test seat and can accommodate the test shaft to pass through; applying a load to the test unit after the loading component is contacted with the test unit; the measuring assembly is fixedly connected with the test bed and is in contact with the test unit.

Preferably, the test unit still includes two at least radial fixing bases, radial fixing base with the test bench is detachable to be connected, be equipped with on the radial fixing base with the shaft hole of experimental axle adaptation, just the axial perpendicular to in shaft hole the moving direction of loading part, the both ends of experimental axle are connected respectively in both sides in the shaft hole of radial fixing base.

Further, the loading part is fixedly connected with a loading block, a pressing block is sleeved outside the test seat, and the pressing block is fixedly connected with the loading block.

Further, the upper end of briquetting is equipped with the spacing portion of briquetting, the fast lower terminal surface of loading be equipped with the briquetting spacing groove of the spacing portion adaptation of briquetting, spacing portion fixed connection of briquetting in the briquetting spacing inslot.

Furthermore, a test bed through hole is formed in the position, corresponding to the test unit, of the test bed, the measuring assembly comprises a grating micrometer, the grating micrometer is fixedly arranged on the lower end face of the test bed, the grating micrometer comprises a measuring portion, and the measuring portion penetrates through the test bed through hole and is in contact with the lower end face of the pressing block.

Preferably, one end of the test shaft is provided with a test shaft flange, the loading part is fixedly connected with a loading block, the test shaft flange is detachably and fixedly connected with the loading block, and the axial direction of the test shaft is parallel to the moving direction of the loading part; the outside of test seat is equipped with the flange limit, the flange limit with the detachable fixed connection of test bench.

Furthermore, a test shaft protruding part is arranged on the test shaft flange, and a test shaft positioning hole matched with the test shaft protruding part is formed in the loading block.

Furthermore, a test bed through hole is formed in the position, corresponding to the test unit, of the test bed, the measuring assembly comprises a grating micrometer, the grating micrometer is fixedly arranged on the lower end face of the test bed, the grating micrometer comprises a measuring portion, and the measuring portion penetrates through the test bed through hole and is in contact with the lower end of the test shaft.

Preferably, the driving assembly at least comprises two sets of ball screws, the two sets of ball screws are respectively and fixedly arranged on two sides of the rack, the two sets of ball screws are respectively and fixedly connected with two sides of the loading part, the ball screws drive the loading part to move along the vertical direction, and at least one set of ball screws are driven by the servo motor.

Furthermore, a force sensor is arranged on the loading part, and the force sensor is connected with the servo motor to form closed-loop control.

The utility model has the advantages of:

1. overall structure is simple, high durability and convenient operation, behind the collocation observing and controlling system, experimental parameter setting and test result can be directly detect and respond to the observing and controlling system through the sensing device who observes and controls the system on, parameter setting can directly be regulated and control through observing and controlling the system, the accuracy of experimental result is also higher than manual measurement's accuracy, and can be satisfied by different measuring component to the measurement accuracy requirement of bearing deformation volume, the more accurate result that measuring component measured is more accurate, under the grating micrometer's that selects for use the preference the condition, the measuring result can be accurate to 1 micron.

2. The bearing rigidity experimental device can respectively measure the deformation quantity of the bearing when the bearing is stressed in the axial direction and the deformation quantity of the bearing when the bearing is stressed in the radial direction. When the deformation of the shaft to be tested when bearing the axial force is detected, the test shaft and the test seat are installed according to the mode shown in figure 7, the servo motor controls the loading component to move downwards, and the axial load is applied to the test shaft. Because the bearing to be tested is matched and connected with the test shaft without relative sliding, the amount of movement in the test shaft direction at the moment is the deformation amount of the bearing to be tested, and the deformation amount of the bearing to be tested when the axial force is applied to the bearing to be tested is further detected; when the deformation quantity of the radial force borne by the shaft to be measured is detected, the radial fixing seat is installed on the test bed in a mode shown in figure 3, the test shaft and the test seat are installed on the radial fixing seat in a mode shown in figure 3, and at the moment, the loading component applies radial load to the test seat through the pressing block. Under the condition that deformation of the test shaft, the test seat and the pressing block is not considered, the downward moving distance of the pressing block is the deformation of the shaft to be tested when bearing radial load, and rigidity strength of the bearing to be tested when bearing radial load is applied is obtained.

3. The force sensor and the servo motor form closed-loop control, and the output power of the servo motor is influenced by signals transmitted by the force sensor, so that the ball screw can be self-regulated, and the accurate control of the loading part on the load applied to the test unit is facilitated.

Drawings

Fig. 1 is a schematic view of a first usage example of the present invention;

FIG. 2 is a half sectional view of a first example of use;

FIG. 3 is a partial view of portion A of FIG. 2;

FIG. 4 is a schematic diagram of a test cell using example one;

fig. 5 is a schematic view of a second usage example of the present invention;

FIG. 6 is a half sectional view of a second example of use;

FIG. 7 is a partial view of portion B of FIG. 6;

FIG. 8 is a schematic diagram of an experimental unit using example two;

description of reference numerals: 1-experimental unit, 10-test bed, 100-test bed through hole, 11-test shaft, 110-test shaft flange, 111-test shaft bulge, 12-test seat, 13-pressing block, 131-pressing block limiting part, 14-loading block, 141-pressing block limiting groove, 15-radial fixing seat, 2-frame, 3-loading part, 31-fixing block, 4-measuring component, 40-measuring part, 41-measuring component fixing block, 5-bearing to be measured and 50-bearing mounting hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may include, for example, a fixed connection, an integral connection, or a detachable connection; may be communication within two elements; they may be directly connected or indirectly connected through an intermediate, and those skilled in the art can understand the specific meaning of the above terms in the present invention in specific situations.

Use example one:

as shown in fig. 1 to 4, the first use example is a use example of the bearing rigidity testing apparatus when the bearing 5 to be tested is subjected to a radial load. The first use example at least comprises a frame 2, and a loading part 3 which can move up and down is connected between the frames 2. A test bed 10 is fixedly connected to the frame 2, and a test unit 1 is arranged between the test bed 10 and the loading part 3. In the process of detecting that the bearing 5 to be tested is subjected to the radial load by the bearing rigidity experiment device, the structure of the test unit 1 is as shown in fig. 3 and 4, and the test unit at least comprises a test shaft 11, a test seat 12 and two radial fixing seats 15. Radial fixing base 15 and test bench 10 fixed connection are equipped with the shaft hole on the radial fixing base 15, and the axial in shaft hole is perpendicular with the moving direction of loading unit 3, and shaft hole and 11 adaptations of experimental axle. Be equipped with bearing mounting hole 50 on test seat 12, bearing mounting hole 50 can hold test axle 11 and pass through, and bearing mounting hole 50 and the bearing 5 adaptation that awaits measuring, guarantee can not remove when the bearing 5 that awaits measuring after will awaiting measuring the bearing 5 installation back in bearing mounting hole 50 again receives the load. The test shaft 11 sequentially penetrates through the radial fixing seat 15 on one side, the bearing 5 to be tested and the radial fixing seat 15 on the other side, and the bearing 5 to be tested is positioned.

In order to facilitate the loading component 3 to apply load to the test bed 12, the loading component 3 is fixedly connected with a loading block 14, a part of the loading block 14 penetrates through the loading component 3 and then is sleeved with a pressing block 13 outside the test bed 12 through a fixing block 31, and the pressing block 13 is connected with the loading block 14. When the loading component 3 is pressed down, the applied load is transmitted along the loading block 14, the pressing block 13 and the test seat 12 in sequence and finally transmitted on the test shaft 11, and the condition that the bearing 5 to be tested is subjected to radial load when in use is simulated. During installation, the pressing block 13 is arranged on the outer side of the bearing 5 to be tested, so that the problem that the error of a test result is large due to the fact that the stress position of the bearing 5 to be tested is inaccurate is avoided.

In order to position the pressing block 13 conveniently, the upper end of the pressing block 13 is provided with a pressing block limiting portion 131, the lower end face of the loading block 14 is provided with a pressing block limiting groove 141 matched with the pressing block limiting portion 131, the pressing block limiting portion 131 and the pressing block limiting portion 141 can be matched and connected to determine the direction of the pressing block 13, and the test bed 12 can be installed in the pressing block 13 conveniently.

When the loading component 3 is pressed down, the downward displacement of the pressing block 13 can reflect the deformation of the bearing 5 to be measured after radial load, so that the measuring component 4 is selected to measure the displacement of the pressing block 13. Preferably, choose the grating micrometer for use, grating micrometer and test bench 10 one side fixed connection dorsad test unit 1, and be equipped with a measuring part 40 on the grating micrometer 10, correspond the position of test unit 1 on test bench 10 and set up a test bench through-hole 100 simultaneously, measuring part 40 passes test bench through-hole 100 back and the lower terminal surface contact of briquetting 13. After the pressing block 13 moves downwards, the measuring part 40 moves downwards along with the pressing block 13, and the grating micrometer measures the displacement of the pressing block 13, namely the deformation of the bearing 5 to be measured. After the grating micrometer is electrically connected with the measurement and control system, the deformation quantity of the bearing 5 to be detected can be directly obtained from the measurement and control system, and the test for detecting the rigidity of the bearing 5 to be detected under the radial load of the bearing 5 to be detected is completed.

Use example two:

as shown in fig. 5 to 8, the second use example is a use example of the bearing rigidity test device when the bearing 5 to be tested receives an axial load, and the principles and component structures of the second use example and the first use example are substantially the same, except that in the second use example, one end of the test shaft 11 is directly fixedly connected with the loading block 14, the test base 12 is fixedly connected with the test bed 10, the load applied to the test shaft 11 by the loading block 14 is along the axial direction of the test shaft 11, and at this time, the downward displacement of the test shaft 11 can reflect the deformation amount of the bearing 5 to be tested when the axial load is received, so the measuring unit 40 only needs to measure the downward displacement of the test shaft 11. The special attention needs to be paid here that the selected test shaft 11 is just matched with the bearing 5 to be measured, so as to avoid the influence of the sliding generated between the test shaft 11 and the bearing 5 to be measured on the measurement precision.

In order to conveniently and fixedly connect the test shaft 11 and the loading block 14, a test shaft flange 110 is arranged at one end of the test shaft 11, and the loading block 14 is connected with the test shaft flange 110 through bolts, so that the test shaft 11 is uniformly stressed when the loading block 14 is pressed down. In order to fix the test bed 12 and the test bed 10 conveniently, a flange edge may be similarly arranged outside the test bed 12, and the flange edge is connected with the test bed 10 by using a bolt to keep the test bed 12 fixed. After the test shaft 11 and the test base 12 are fixed, the loading part 3 is driven to apply a load downwards, and the deformation quantity of the bearing 5 to be tested under the axial force can be detected.

Preferably, the test shaft flange 110 is further provided with a test shaft protrusion 111, and the test shaft flange 14 is provided with a test shaft positioning hole matched with the test shaft protrusion 111, so that the test shaft 11 and the load block 14 can be conveniently aligned and mounted.

Preferably, the loading part 3 is driven by a ball screw, the ball screw comprises at least two sets of ball screws which are fixedly connected with the machine frames 2 on the two sides respectively, the two sides of the loading part 3 are fixedly connected with the two sets of ball screws respectively, and the ball screws drive the loading part 3 to move up and down along the vertical direction. At least one set of ball screw is driven by a servo motor, and the rest ball screws play a role in guiding. The moving speed of ball screw can be adjusted to servo motor, and the load size that can externally apply is adjusted to the phase change, and preferred can also set up force sensor on load component 3, and force sensor can detect the load size of externally applying of load component 3, and force sensor is connected the back with observing and controlling the system electricity, and the load size can be reacted on observing and controlling the system, and convenience of customers collects and applies the relation between load and the bearing 5 rigidity that awaits measuring. Meanwhile, the force sensor can be connected with the servo motor to form closed-loop control, so that the servo motor can automatically adjust the power output to the outside, and the control accuracy of the servo motor is improved.

In summary, the above description is only a preferred embodiment of the present invention and should not be taken as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention should be included within the scope of the present invention.

Claims (10)

1. A bearing rigidity test device is characterized by at least comprising:

a frame (2);

the loading component (3) is movably connected with the rack (2), and a driving assembly for driving the loading component (3) to move along the vertical direction is arranged in the rack (2);

the test bed (10), the said test bed (10) is fixed in the said framework (2);

the test unit (1) is arranged between the test bed (10) and the loading part (3), the test unit (1) at least comprises a test shaft (11) and a test seat (12), a bearing mounting hole (50) is formed in the test seat (12), and the bearing mounting hole (50) can accommodate the test shaft (11) to pass through; the loading component (3) is in contact with the test unit (1) and then applies load to the test unit (1);

the measuring component (4), the measuring component (4) with test bench (10) fixed connection, just measuring component (4) with test unit (1) contact.

2. The bearing rigidity testing device according to claim 1, wherein the testing unit (1) further comprises at least two radial fixing seats (15), the radial fixing seats (15) are detachably connected with the testing table (10), shaft holes matched with the testing shafts (11) are formed in the radial fixing seats (15), the axial directions of the shaft holes are perpendicular to the moving direction of the loading part (3), and two ends of each testing shaft (11) are respectively connected to the shaft holes of the radial fixing seats (15) on two sides.

3. The bearing rigidity test device according to claim 2, characterized in that the loading component (3) is fixedly connected with a loading block (14), a pressing block (13) is sleeved outside the test seat (12), and the pressing block (13) is fixedly connected with the loading block (14).

4. The bearing rigidity test device according to claim 3, wherein a briquetting limiting part (131) is arranged at the upper end of the briquetting (13), a briquetting limiting groove (141) matched with the briquetting limiting part (131) is arranged at the lower end face of the loading block (14), and the briquetting limiting part (131) is fixedly connected in the briquetting limiting groove (141).

5. The bearing rigidity testing device according to claim 3, wherein a testing table through hole (100) is formed in the testing table (10) corresponding to a position where the testing unit (1) is installed, the measuring component (4) comprises a grating micrometer which is fixedly arranged on the lower end face of the testing table (10), the grating micrometer comprises a measuring part (40), and the measuring part (40) penetrates through the testing table through hole (100) and is in contact with the lower end face of the pressing block (13).

6. The bearing rigidity testing device according to claim 1, characterized in that one end of the testing shaft (11) is provided with a testing shaft flange (110), the loading part (3) is fixedly connected with a loading block (14), the testing shaft flange (110) is detachably and fixedly connected with the loading block (14), and the axial direction of the testing shaft (11) is parallel to the moving direction of the loading part (3); the outer part of the test seat (12) is provided with a flange edge, and the flange edge is detachably and fixedly connected with the test bed (10).

7. The bearing rigidity test device according to claim 6, characterized in that a test shaft protrusion (111) is arranged on the test shaft flange (110), and a test shaft positioning hole matched with the test shaft protrusion (111) is arranged on the loading block (14).

8. The bearing rigidity testing device according to claim 5, wherein a testing stand through hole (100) is formed in the testing stand (10) at a position corresponding to the testing unit (1), the measuring component (4) comprises a grating micrometer which is fixedly arranged on the lower end face of the testing stand (10), the grating micrometer comprises a measuring part (40), and the measuring part (40) penetrates through the testing stand through hole (100) and is in contact with the lower end of the testing shaft (11).

9. The bearing rigidity test device according to any one of claims 1 to 7, characterized in that the driving assembly comprises at least two sets of ball screws, the two sets of ball screws are respectively fixedly arranged on two sides of the frame (2), the two sets of ball screws are respectively fixedly connected with two sides of the loading part (3), the ball screws drive the loading part to move along the vertical direction, and at least one set of ball screws is driven by a servo motor.

10. The bearing rigidity test device according to claim 9, characterized in that a force sensor is arranged on the loading part (3), and the force sensor is connected with the servo motor to form closed-loop control.

Images