A pre-tightening device for a shafting installation of a tapered roller bearing testing machine

Abstract

The utility model discloses a kind of pre-tightening devices for conical roller bearing testing machine shafting installation, the outer part of right side stepped of main shaft is successively sleeved with spacer sleeve one and spacer sleeve two, the outer periphery of spacer sleeve one is sleeved with conical roller bearing one, the outer periphery of spacer sleeve two is sleeved with conical roller bearing two, the outer part of conical roller bearing one is equipped with loading wheel one, the outer part of conical roller bearing two is equipped with loading wheel two;Along the circumferential end surface between loading wheel one and loading wheel two, pre-tightening mechanism is evenly arranged;The pre-tightening device is simple and compact in structure, the trend of loading wheel one and loading wheel two sliding to inside is avoided by the support of pre-tightening mechanism, using screw rod, screw sleeve and pressure sensor, the pre-tightening force between loading wheel one and loading wheel two is accurately adjusted, position state of a pair of conical roller bearing inner and outer rings is adjusted simultaneously, satisfy the test requirement of large-scale various specifications bearing, improve bearing test installation efficiency and the overall test performance of testing machine.

Description

Technical Field

[0001] This utility model belongs to the technical field of bearing testing machines, specifically relating to a pre-tightening device for shaft system installation in a tapered roller bearing testing machine. Background Technology

[0002] Tapered roller bearings are key basic components in equipment manufacturing and are widely used in various rotating machinery. The performance indicators of the bearings directly affect the performance, reliability and service life of the entire machine. During the design, development and manufacturing process, the bearings must be verified under corresponding simulated working conditions on a testing machine.

[0003] In the shaft system assembly of a tapered roller bearing testing machine, the main shaft system is the core of the entire testing equipment, and a reasonable main shaft system structure is key to the smooth conduct of the test. The shaft system plays a supporting role in the entire equipment, and a pair of test bearings are installed on the shaft system. The outer ring of the test bearing is radially and evenly loaded using loading wheels. Since the inner and outer rings of the tapered roller bearing are separate structures, the loading wheels set on the outer circumference of the bearing's outer ring tend to slip. It is necessary to adjust the position of the loading wheels and the test bearing. How to support the two loading wheels and achieve the preload effect, while ensuring that the inner and outer rings of the test bearing are concentrically installed, so that the loading wheels can circumferentially and evenly load the outer ring of the test bearing to test the performance of the test bearing, is also an urgent problem to be solved. Summary of the Invention

[0004] To solve the above-mentioned technical problems, this utility model provides a pre-tightening device for shaft system installation of tapered roller bearing testing machine. A pre-tightening mechanism is set between two loading wheels. The pre-tightening force between the loading wheels is adjusted by the mechanism to maintain the concentric position of the inner and outer rings of the bearing. The radial force is uniformly applied by the loading wheels to ensure smooth test and improve test efficiency.

[0005] The technical solution adopted by this utility model is as follows: a pre-tightening device for shaft system installation of a tapered roller bearing testing machine, including a base, which is horizontally arranged, with left and right supports at both ends of the base. The left end of a hollow stepped main shaft is mounted on the left support via a bearing, and a left end plate is fixedly mounted on the left side of the main shaft. A right end plate is fixedly mounted on the right side of the main shaft, and the right end plate is connected to a reducer and a motor via a coupling, with the motor driving the main shaft to rotate. Spacer 1 and spacer 2 are sequentially fitted on the outer side of the stepped main shaft. Tapered roller bearing 1 is fitted on the outer circumference of spacer 1, and tapered roller bearing 2 is fitted on the outer circumference of spacer 2. Loading wheel 1 is fitted on the outer side of tapered roller bearing 1, and loading wheel 2 is fitted on the outer side of tapered roller bearing 2. Pre-tightening mechanisms are evenly distributed between the circumferential end faces of loading wheel 1 and loading wheel 2.

[0006] The pre-tightening mechanism includes a screw, one end of which is threaded to the right circumferential end face of the loading wheel one, and the other end of which is threaded to the inside of a screw sleeve. The other end of the screw sleeve is threaded to a pressure sensor, and the other end of the pressure sensor abuts against the left circumferential end face of the loading wheel two.

[0007] The pre-tightening mechanism is provided in at least four sets, and the pre-tightening mechanisms are arranged axially at intervals along the right circumferential end face of the loading wheel.

[0008] The tapered roller bearing 1 and tapered roller bearing 2 are paired and supported back to back. The inner rings of tapered roller bearing 1 and tapered roller bearing 2 are respectively interference-fitted with spacer 1 and spacer 2, and the outer rings of tapered roller bearing 1 and tapered roller bearing 2 are respectively interference-fitted with loading wheel 1 and loading wheel 2.

[0009] The pressure sensor is connected to the microcomputer via a cable to transmit the pre-tightening pressure signal.

[0010] The left annular end face of the first spacer is fixedly connected to the left end face of the spindle step by bolts, and the right annular end face of the second spacer is fixedly connected to the right end face of the spindle step by bolts; the right end face of the first spacer abuts against the left end face of the second spacer.

[0011] The left end face of the first spacer is provided with a left end cap, and the left side of the first spacer is integrally provided with a circular protrusion. A deep groove ball bearing is fitted between the protrusion of the first spacer and the lower part of the left end cap; the right end face of the second spacer is provided with a right end cap.

[0012] The lower annular groove of the loading wheel two is supported on the right support, and the upper annular groove of the loading wheel two is provided with a semi-circular upper cover plate; the two ends of the upper cover plate are fixed to the two ends of the right support by bolts.

[0013] A pre-tightening mechanism is axially and evenly distributed between the circumferential end faces of loading wheel one and loading wheel two. The pre-tightening mechanism includes a screw, one end of which is threaded to the right circumferential end face of loading wheel one, and the other end of which is threaded into a threaded sleeve. The other end of the threaded sleeve is threaded to a pressure sensor, and the other end of the pressure sensor abuts against the left circumferential end face of loading wheel two. This arrangement aims to ensure that at least four sets of pre-tightening mechanisms are axially and evenly distributed between the circumferential end faces of loading wheel one and loading wheel two. The support of the pre-tightening mechanisms prevents loading wheel one and loading wheel two from slipping inwards. Rotating the threaded sleeve precisely adjusts the pre-tightening force between loading wheel one and loading wheel two, indirectly adjusting the position of the outer rings of the pair of test tapered roller bearings. The pressure sensor detects that the pre-tightening force values ​​of the four sets of pre-tightening mechanisms are the same, ensuring that the inner and outer rings of tapered roller bearing one and tapered roller bearing two are concentric. The uniform application of radial force by the loading wheels improves test efficiency and ensures smooth test execution.

[0014] Spacer 1 and spacer 2 are sequentially fitted on the outer right side of the main shaft. A tapered roller bearing 1 is fitted on the outer circumference of spacer 1, and a tapered roller bearing 2 is fitted on the outer circumference of spacer 2. The purpose of this arrangement is that, since the tapered roller bearings used as test bearings are large in size and come in various specifications, spacers are used to adapt to the bearing tests of large tapered roller bearings. By modifying the size of the spacers, they can be used to test tapered roller bearings of different specifications and sizes, making the machine multi-functional and improving the bearing test installation efficiency and the overall testing performance of the testing machine.

[0015] The beneficial effects of this utility model are as follows: The pre-tightening device of this bearing testing machine is scientifically and rationally designed, with a simple and compact structure. The support of the pre-tightening mechanism avoids the tendency of loading wheel one and loading wheel two to slip inward. By using screws, screw sleeves and pressure sensors, the pre-tightening force between loading wheel one and loading wheel two is precisely adjusted, while the position of the inner and outer rings of a pair of tapered roller bearings is also adjusted. The spacer setting meets the testing requirements of large bearings of various specifications. It is a multi-purpose machine, which improves the bearing testing and installation efficiency and the overall testing performance of the testing machine. Attached Figure Description

[0016] Figure 1 This is a schematic cross-sectional view of the shaft system installation and pre-tightening device for the bearing testing machine of this utility model;

[0017] Figure 2 This is a three-dimensional cross-sectional view of the shaft system installation and support structure of the bearing testing machine of this utility model.

[0018] The markings in the diagram are: 1. Main shaft; 2. Spacer 1; 3. Spacer 2; 4. Tapered roller bearing 1; 5. Tapered roller bearing 2; 6. Loading wheel 1; 7. Loading wheel 2; 8. Screw; 9. Screw sleeve; 10. Pressure sensor; 11. Left support; 12. Right support; 13. Left end cover; 14. Right end cover; 15. Base; 16. Deep groove ball bearing. Detailed Implementation

[0019] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0020] like Figure 1-2As shown, a pre-tightening device for shaft system installation of a tapered roller bearing testing machine includes a base 15, which is horizontally positioned. A left support 11 and a right support 12 are provided at both ends of the base 15. The left end of a hollow stepped main shaft 1 is mounted on the left support 11 via a bearing. A left end plate is fixedly mounted on the left side of the main shaft 1. A right end plate is fixedly mounted on the right side of the main shaft 1. The right end plate is connected to a reducer and a motor via a coupling, and the motor drives the main shaft 1 to rotate. Spacer 1 2 and spacer 2 3 are sequentially fitted onto the outer side of the stepped main shaft 1. A tapered roller bearing 4 is fitted onto the outer circumference of spacer 1 2, and a tapered roller bearing 5 is fitted onto the outer circumference of spacer 2 3. A loading wheel 6 is fitted onto the outer side of tapered roller bearing 4, and a loading wheel 7 is fitted onto the outer side of tapered roller bearing 5. Pre-tightening mechanisms are evenly distributed between the circumferential end faces of loading wheel 1 6 and loading wheel 2 7. There are at least four sets of pre-tightening mechanisms, which are arranged axially at intervals along the right circumferential end face of the loading wheel 6.

[0021] The pre-tightening mechanism includes a screw 8, one end of which is threaded to the right circumferential end face of the loading wheel 6, and the other end of which is threaded to the inside of a screw sleeve 9. A pressure sensor 10 is threaded to the other end of the screw sleeve 9, and the other end of the pressure sensor 10 abuts against the left circumferential end face of the loading wheel 7. The pressure sensor 10 is connected to a microcomputer via a cable to transmit the pre-tightening pressure signal.

[0022] The tapered roller bearing 4 and tapered roller bearing 5 are paired back-to-back, which provides a large load range and good support stability. The inner rings of tapered roller bearing 4 and tapered roller bearing 5 are interference-fitted with spacer 2 and spacer 3, respectively, and the outer rings of tapered roller bearing 4 and tapered roller bearing 5 are interference-fitted with loading wheel 6 and loading wheel 7, respectively.

[0023] The left annular end face of the first spacer 2 is fixedly connected to the left end face of the step of the main shaft 1 by bolts, and the right annular end face of the second spacer 3 is fixedly connected to the right end face of the step of the main shaft 1 by bolts; the right end face of the first spacer 2 abuts against the left end face of the second spacer 3.

[0024] The left end cover 13 is provided on the left side of the spacer 2. The left side of the spacer 2 has an integrally formed annular protrusion. A deep groove ball bearing 16 is fitted between the protrusion of the spacer 2 and the lower part of the left end cover 13. The right end cover 14 is provided on the right side of the spacer 3. The left end cover 13 and the right end cover 14 are fixedly connected to the outer ends of the spacer and the loading wheel by bolts, which serves as a seal to prevent dust and other debris from falling into the test shaft system.

[0025] The lower annular groove of the loading wheel 7 is supported on the right support 12, and the upper annular groove of the loading wheel 7 is provided with a semi-circular upper cover plate; the two ends of the upper cover plate are fixed to the two ends of the right support 12 by bolts.

[0026] In use, according to the installation dimensions of the tapered roller bearing to be tested, use spacers 1-2 and 2-3 with appropriate structural dimensions. First, install spacers 1-2 and 2-3 on the stepped part of the main shaft 1 and fix them to the two end faces of the stepped part of the main shaft 1 with bolts. Then, install the two sets of tapered roller bearings to be tested back to back on the outer circumference of spacers 1-2 and 2-3. Install loading wheels 1-6 and 2-7, and install four sets of pre-tightening mechanisms. Then, install the main shaft 1 with the tapered roller bearings to be tested inside the left support 11 and the right support 12. Then, connect the right end plate of the main shaft 1 to the reducer and motor in sequence through the coupling. Connect the wiring harnesses of each pressure sensor 10 to the microcomputer.

[0027] The preload force can be adjusted by rotating the screw sleeve 9 to change the length of the preload screw 8. A pressure sensor 10 installed at the head of the screw sleeve 9 allows for real-time measurement of the preload force, facilitating the adjustment of the preload force values ​​of the four preload rods to be consistent. The preload force measured by the pressure sensors 10 of the four preload mechanisms can provide feedback on the position of the inner and outer rings of the tapered roller bearing. When the preload force of the four preload mechanisms is consistent, it can be considered that the inner and outer rings of the tested tapered roller bearing are concentric and evenly fitted, ensuring that the inner and outer rings of tapered roller bearing 4 and tapered roller bearing 5 are concentrically positioned.

[0028] After the overall shaft system structure of the bearing testing machine is installed, the motor drives the main shaft 1 to rotate, which in turn drives the inner rings of spacer 1 2, spacer 2 3, tapered roller bearing 1 4, and tapered roller bearing 2 5 to rotate. The outer rings of tapered roller bearing 1 4 and tapered roller bearing 2 5 are fixed to loading wheels 1 6 and 2 7. The bearing load test is carried out by uniformly applying radial force to the loading wheels from the outside, which improves the test efficiency and ensures the smooth progress of the test.

[0029] The parts of this invention not described in detail are prior art. Besides the embodiments described above, this utility model may have other implementations, and all technical solutions formed by equivalent substitution or equivalent transformation fall within the protection scope claimed by this utility model.

Claims

1. A pre-tensioning device for a conical roller bearing tester shafting installation, characterized by: The base is horizontally positioned, with left and right supports at both ends. The hollow, stepped spindle is mounted on the left support via a bearing on its left end, and a left end plate is fixed to the left side of the spindle. A right end plate is fixed to the right side of the spindle, and the right end plate is connected to a reducer and a motor via a coupling, with the motor driving the spindle to rotate. Spacer 1 and spacer 2 are sequentially fitted on the outside of the stepped spindle on the right side. Tapered roller bearing 1 is fitted on the outer circumference of spacer 1, and tapered roller bearing 2 is fitted on the outer circumference of spacer 2. Loading wheel 1 is fitted on the outside of tapered roller bearing 1, and loading wheel 2 is fitted on the outside of tapered roller bearing 2. Preload mechanisms are evenly distributed between the circumferential end faces of loading wheel 1 and loading wheel 2.

2. A pre-tensioning device for shaft mounting of a tapered roller bearing tester according to claim 1, characterized in that: The pre-tightening mechanism includes a screw, one end of which is threaded to the right circumferential end face of the loading wheel one, and the other end of which is threaded to the inside of a screw sleeve. The other end of the screw sleeve is threaded to a pressure sensor, and the other end of the pressure sensor abuts against the left circumferential end face of the loading wheel two.

3. A pre-tensioning device for shaft mounting of a tapered roller bearing tester according to claim 1, characterized in that: There are at least four sets of pre-tightening mechanisms, which are arranged axially at intervals along the right circumferential end face of the loading wheel.

4. A preloading device for shaft mounting of a tapered roller bearing tester according to claim 1, characterized in that: Tapered roller bearing 1 and tapered roller bearing 2 are paired with back-to-back support. The inner rings of tapered roller bearing 1 and tapered roller bearing 2 are respectively interference-fitted with spacer 1 and spacer 2, and the outer rings of tapered roller bearing 1 and tapered roller bearing 2 are respectively interference-fitted with loading wheel 1 and loading wheel 2.

5. A preloading device for shaft mounting of a tapered roller bearing tester according to claim 2, characterized in that: The pressure sensor is connected to the microcomputer via a cable to transmit the pre-tightening pressure signal.

6. A preloading device for shaft mounting of a tapered roller bearing tester according to claim 1, characterized in that: The left circular end face of spacer one is fixedly connected to the left end face of the spindle step by bolts, and the right circular end face of spacer two is fixedly connected to the right end face of the spindle step by bolts; the right end face of spacer one abuts against the left end face of spacer two.

7. A preload device for shaft system installation in a tapered roller bearing testing machine according to claim 1, characterized in that: A left end cap is provided on the left end face of spacer one, and a circular protrusion is integrally provided on the left side of spacer one. A deep groove ball bearing is fitted between the protrusion of spacer one and the lower part of the left end cap; a right end cap is provided on the right end face of spacer two.

8. A preloading device for shaft mounting of a tapered roller bearing tester according to claim 1, characterized in that: The lower annular groove of the second loading wheel is supported on the right support, and the upper annular groove of the second loading wheel is provided with a semi-circular upper cover plate; the two ends of the upper cover plate are fixed to the two ends of the right support by bolts.

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