CN210603905U - Static load testing machine for roller bearing - Google Patents

Abstract

The utility model provides a roller bearing static load testing machine, wherein a servo electric cylinder is arranged at the top of a frame, the servo electric cylinder is connected with a controller, and an output screw rod of the servo electric cylinder faces downwards; the test fixture is arranged on the table top of the rack and is positioned right below the servo electric cylinder, the test fixture comprises a base, upper clamping blocks, lower clamping blocks, a mandrel, a ring gauge and a pull head, the base is fixed on the table top, the two lower clamping blocks are arranged on the base at intervals, the two upper clamping blocks are respectively positioned above the two lower clamping blocks, the opposite upper clamping blocks and the lower clamping blocks are locked through bolts, and the two upper clamping blocks can respectively clamp two ends of the mandrel; the outer diameter of the mandrel is matched with the inner diameter of the bearing, the bearing is sleeved on the mandrel and is positioned in a gap between the two upper clamping blocks, the ring gauge is sleeved on the bearing, the top of the ring gauge is clamped in the pull head, and the servo electric cylinder can compress the pull head. The utility model discloses an application scope is big, and heat dissipation load is little, and the test result accuracy is high.

Description

Static load testing machine for roller bearing

Technical Field

The utility model belongs to the technical field of the bearing processing, concretely relates to gyro wheel bearing static load testing machine.

Background

The roller bearing provides support for the rotating shaft and reduces load friction, the rigidity and radial load of the bearing are critical to the stability of the bearing system, and in order to ensure that the radial load of the roller bearing meets the industrial standard, a testing machine is required to carry out static load test on the roller bearing. The existing roller bearing static load testing machine adopts a hydraulic cylinder to generate rated pressure on a workpiece, and repeated experiments are carried out for a plurality of times until the workpiece cannot bear the pressure to generate damage. Because the stroke of the hydraulic cylinder is rated, the coverage range of a test product is small, and the application range of equipment is limited; in addition, the hydraulic cylinder is driven by hydraulic oil, the heat dissipation load of the testing machine can be increased due to the rise of the oil temperature, and the phenomenon of oil leakage is easy to occur. The bearing jig is arranged on the existing testing machine to position the bearing, but the bearing can still slightly rotate when being pressed by the hydraulic cylinder, so that the testing result of the radial static load force is inaccurate.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a gyro wheel bearing static load testing machine to the application range who solves current bearing static load testing machine's pneumatic cylinder is little, and the thermal diffusivity is poor, and the not high problem of test result accuracy.

The utility model provides a following technical scheme:

a static load testing machine for a roller bearing comprises a rack, wherein a servo electric cylinder is longitudinally arranged at the top of the rack and is connected with a controller, an output screw rod of the servo electric cylinder faces downwards, and the controller can control the output pressure and the output stroke of the servo electric cylinder; the testing jig is arranged on the table top of the rack and located right below the servo electric cylinder, the testing jig comprises a base, an upper clamping block, a lower clamping block, a mandrel, a ring gauge and a pull head, the base is fixed on the table top, the lower clamping block is arranged on the base, the upper clamping block and the lower clamping block are oppositely arranged and locked through bolts, and the mandrel can be clamped by the upper clamping block and the lower clamping block; the outer diameter of the mandrel is matched with the inner diameter of a bearing to be tested, the bearing is sleeved on the mandrel and does not contact the lower clamping block and the upper clamping block, a ring gauge matched with the outer diameter of the bearing is sleeved on the bearing, the top of the ring gauge is clamped in the pull head, and the servo electric cylinder can press the pull head. The base is provided with two lower clamping blocks at intervals, the two upper clamping blocks are respectively positioned above the two lower clamping blocks, the two upper clamping blocks respectively clamp two ends of the mandrel, and the bearing and the ring gauge are positioned in a gap between the two upper clamping blocks.

Preferably, the upper clamping block and the lower clamping block are oppositely provided with a V-shaped clamping groove, and the end part of the mandrel is positioned in the V-shaped clamping groove.

Preferably, a T-shaped groove is formed in the lower side of the pull head, the T-shaped groove penetrates through the pull head downwards, a T-shaped block matched with the T-shaped groove is arranged at the top of the ring gauge, and the T-shaped block is inserted into the T-shaped groove.

Preferably, two wedge block grooves are oppositely arranged in the pull head, the wedge block grooves are positioned on two sides of the top of the T-shaped groove and communicated with the T-shaped groove, a wedge block is arranged in each wedge block groove, and the bottom of each wedge block compresses the T-shaped block; a clamping bolt is horizontally inserted into the two wedges and the pull head, and the clamping bolt fastens the two wedges through nuts.

Preferably, the top of the pull head is provided with a pressed blind hole matched with an output screw rod of the servo electric cylinder, and the output screw rod of the servo electric cylinder can be pressed into the pressed blind hole.

Preferably, a positioning frame is installed on the table board, a horizontal positioning plate is installed on the positioning frame, a positioning hole matched with the lower end cover of the servo electric cylinder is formed in the positioning plate, and the lower end cover of the servo electric cylinder is located in the positioning hole.

The utility model has the advantages that: the utility model utilizes the servo electric cylinder to repeatedly apply static load pressure to the bearing, can control the servo electric cylinder through the controller, provides accurate pressure output and pressure stroke, has large coverage range to the bearing to be measured and strong applicability; the utility model discloses a servo motor replaces the pneumatic cylinder, and the hydraulic oil temperature that has avoided the pneumatic cylinder rises and causes the problem of radiating effect difference and oil leak. The utility model discloses an experimental tool includes clamp splice and lower clamp splice, inserts the dabber in the bearing, overlaps the ring gage on the bearing, and the top card of ring gage is in the pull head, and clamp splice and the both ends of clamp splice clamping mandrel down are gone up to the reuse, and the output lead screw of servo electric jar acts on the pull head, through ring gage transmission static pressure, and the bearing can not rotate in the experimentation, can apply radial static load power to the bearing steadily, and the test result is accurate reliable.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic structural view of the testing jig of the present invention;

FIG. 3 is a schematic cross-sectional view of the test fixture cut longitudinally from the middle of the mandrel;

fig. 4 is a schematic structural view of another viewing angle of the testing jig of the present invention;

labeled as: 1. a frame; 2. a servo electric cylinder; 3. a positioning frame; 4. positioning a plate; 5. a table top; 6. testing the jig; 7. a base; 8. an upper clamping block; 9. a lower clamping block; 10. a mandrel; 11. a ring gauge; 12. a wedge block; 13. a slider; a V-shaped clamping groove; a T-shaped block; 16. a threaded hole; 17. a pressed blind hole; 18. and a bearing.

Detailed Description

As shown in fig. 1, the present embodiment provides a static load testing machine for a roller bearing, which is used to continuously apply static load pressure to the roller bearing and repeat the test for many times until the bearing is damaged due to insufficient pressure. This device includes frame 1, servo electric jar 2 is installed along vertically to the top of frame 1, servo electric jar 2's output lead screw down, still install the controller in the frame 1, external power source is all connected to servo electric jar 2 and controller, servo electric jar 2 interconnects with the controller, install the touch-sensitive screen of being connected with the controller on the frame 1, can set up servo electric jar 2's output pressure and stroke through the touch-sensitive screen, in order to be adapted to testing the bearing of different specifications. Install locating rack 3 on the mesa of frame 1, install horizontally locating plate 4 on the locating rack 3, be equipped with the locating hole that matches with the lower end cover of servo electric jar 2 on the locating plate 4, the lower end cover of servo electric jar 2 is located the locating hole, and the locating hole is spacing to the lower end cover, avoids 2 action in-process of servo electric jar to take place to rock and influence the stability of static load.

As shown in fig. 2 to 4, a testing jig 6 is mounted on the table-board 5 of the rack 1, and the testing jig 6 is located right below the servo electric cylinder 2. The test fixture 6 comprises a base 7, an upper clamping block 8, a lower clamping block 9, a mandrel 10, a ring gauge 11, a wedge block 12 and a pull head 13. The base 7 is fixedly installed on the table top 5 through bolts, the two lower clamping blocks 9 are installed on the base 7 at intervals, the two upper clamping blocks 8 are respectively located above the two lower clamping blocks 7, the V-shaped clamping grooves 14 are oppositely formed in the upper clamping blocks 8 and the lower clamping blocks 9, the end portions of the mandrel 10 are arranged in the V-shaped clamping grooves 14, the opposite upper clamping blocks 8 and the lower clamping blocks 9 are locked through bolts, therefore, the two ends of the mandrel 10 are clamped, and balance and reliable static pressure can be conveniently provided for a bearing 18 in the middle of the mandrel 10.

As shown in FIG. 3, the outer diameter of the mandrel 10 is matched with the inner diameter of a bearing 18 to be tested, the bearing 18 is sleeved in the middle of the mandrel 10, the bearing 18 is located in a gap between the two lower clamping blocks 7, a ring gauge 11 matched with the outer diameter of the bearing 18 is sleeved on the bearing 18, the top of the ring gauge 11 is clamped in the puller 13, the servo electric cylinder 2 can press the puller 13, and static pressure is transmitted to the bearing 18 through the puller 13 and the ring gauge 11.

Specifically, as shown in fig. 2 to 4, a T-shaped groove is formed on the lower side of the slider 13, the T-shaped groove penetrates through the slider 13 downwards, a T-shaped block 15 matched with the T-shaped groove is arranged at the top of the ring gauge 11, and the T-shaped block 15 is inserted into the T-shaped groove, so that the ring gauge 11 is installed on the slider 13. Wedge block grooves are respectively formed in the left side and the right side of the inner portion of the pull head 13, the cross sections of the wedge block grooves are of right-angled trapezoid structures, and oblique waists of the two wedge block grooves are arranged oppositely; the wedge block groove is positioned at the top of the T-shaped groove and is communicated with the T-shaped groove, a wedge block 12 matched with the wedge block groove in structure is installed in the wedge block groove, and a T-shaped block 15 is tightly pressed at the bottom of the wedge block 12; a through threaded hole 16 is formed in the wedge 12 and the slider 13, a clamping bolt (not shown) is horizontally installed in the threaded hole 16 to connect the two wedges 12 and the slider 13, and a nut is screwed on the tail of the clamping bolt to fasten the two wedges 12, so that the wedge 12 presses the T-shaped block 15 to firmly fix the ring gauge 11 on the slider 13. To facilitate removal of the wedge 12 from the slider 13, the length of the wedge 12 is increased appropriately so that the outer side wall thereof slightly protrudes out of the wedge groove, thereby increasing the force-receiving area for removal and allowing quick removal of the wedge 12.

The top of the pull head 13 is provided with a pressed blind hole 17 matched with an output screw rod of the servo electric cylinder 2, and the output screw rod of the servo electric cylinder 2 can be pressed into the pressed blind hole 17 to press the pull head 13 tightly.

The working process of the equipment is as follows: sleeving a bearing 18 in the middle of the mandrel 10, and sleeving a ring gauge 11 on the bearing 18; placing two ends of a mandrel 10 on two lower clamping blocks 9 respectively, covering an upper clamping block 8, and screwing a bolt to enable the upper clamping block 8 to clamp the mandrel 10; inserting a T-shaped block 15 at the top of the ring gauge 11 into a T-shaped groove of the pull head 13, respectively inserting two wedges 12 into the two wedge grooves, locking a clamping bolt, fastening the wedges 12 in the pull head 13, and pressing the T-shaped block 15 tightly, thereby reliably connecting the ring gauge 11 with the pull head 13; and starting the servo electric cylinder 2, pressing an output screw rod into the pressed blind hole 17 on the pull head, starting to apply static pressure to the bearing 18, returning the output screw rod of the servo electric cylinder 2 to the original position after the test is finished, loosening the clamping bolt and the upper clamping block 8, and taking out the bearing 18.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. 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 (6)

1. The roller bearing static load testing machine is characterized by comprising a rack, wherein a servo electric cylinder is longitudinally arranged at the top of the rack and is connected with a controller, an output screw rod of the servo electric cylinder faces downwards, and the controller can control the output pressure and the output stroke of the servo electric cylinder; the testing jig is arranged on the table top of the rack and located right below the servo electric cylinder, the testing jig comprises a base, upper clamping blocks, lower clamping blocks, a mandrel, a ring gauge and a pull head, the base is fixed on the table top, the two lower clamping blocks are arranged on the base at intervals, the two upper clamping blocks are respectively located above the two lower clamping blocks, the upper clamping blocks and the lower clamping blocks which are opposite are locked through bolts, and the two upper clamping blocks can respectively press two ends of the mandrel; the outer diameter of the mandrel is matched with the inner diameter of a bearing to be tested, the bearing is sleeved on the mandrel and is positioned in a gap between the two upper clamping blocks, a ring gauge matched with the outer diameter of the bearing is sleeved on the bearing, the top of the ring gauge is clamped in the pull head, and the servo electric cylinder can press the pull head.

2. The roller bearing static load testing machine according to claim 1, wherein the upper clamping block and the lower clamping block are oppositely provided with V-shaped clamping grooves, and the end part of the mandrel is clamped in the V-shaped clamping grooves.

3. The roller bearing static load testing machine according to claim 2, wherein a T-shaped groove is formed on the lower side of the pull head, and the T-shaped groove penetrates through the pull head downwards; the top of ring gage be equipped with T type piece that T type groove matches, T type piece inserts in the T type groove.

4. The roller bearing static load testing machine according to claim 3, wherein two wedge grooves are oppositely arranged in the pull head, the two wedge grooves are symmetrically arranged at two sides of the top of the T-shaped groove and are communicated with the T-shaped groove, a wedge is arranged in each wedge groove, and the bottom of each wedge compresses the T-shaped block; a clamping bolt is horizontally inserted into the two wedges and the pull head, and the clamping bolt fastens the two wedges through nuts.

5. The roller bearing static load testing machine according to claim 1, wherein the top of the slider is provided with a pressed blind hole matched with the output screw rod of the servo electric cylinder, and the end part of the output screw rod of the servo electric cylinder can be pressed into the pressed blind hole.

6. The roller bearing static load testing machine according to claim 1, wherein a positioning frame is mounted on the table top, a horizontal positioning plate is mounted on the positioning frame, a positioning hole matched with the lower end cover of the servo electric cylinder is formed in the positioning plate, and the lower end cover of the servo electric cylinder is located in the positioning hole.

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