High-efficiency testing fixture for linear bearings

Abstract

This invention discloses a high-efficiency testing fixture for linear bearings, comprising a fixture base, a fixture shaft on the fixture base, a fixture hole extending through the center of the fixture shaft along its length, a mandrel slidably disposed in the fixture hole, and fixture rings at both ends of the fixture hole. A receiving groove is formed between the inner circumferential walls of the two fixture rings and the outer circumferential wall of the mandrel for accommodating an external linear bearing to be tested. A fixing member is provided on the fixture shaft for fixing the fixture rings and preventing the external linear bearing to be tested from dislodging from the receiving groove. A driving member is provided on the fixture base for driving the mandrel to slide along the length of the fixture hole. An application member is provided on the fixture base for applying radial load to the fixture shaft. This invention solves the problem in the prior art of lacking a testing fixture that is simple to operate, easy to install, has high efficiency in mandrel reciprocating motion, and can simulate the actual stress conditions of linear bearings.

Description

Technical Field

[0001] This invention relates to the field of linear bearing testing fixtures, specifically a high-efficiency testing fixture for linear bearings. Background Technology

[0002] Linear bearings are low-cost linear motion systems used in conjunction with cylindrical shafts for unlimited stroke applications. They are widely used in sliding components of industrial machinery such as precision machine tools, textile machinery, food packaging machinery, and printing machinery. Linear bearings are mechanical components that provide support and sliding guidance for the telescopic motion of a spindle in equipment. In existing technologies, the inner ring of a linear bearing is fitted onto the reciprocating spindle, while the outer ring connects to components of external mechanical equipment. After production, linear bearings require performance testing. However, existing performance testing fixtures are inefficient. They use cylinders to drive the spindle in reciprocating motion, but cylinder-driven operation is inefficient. Furthermore, existing testing fixtures lack the function of applying radial loads to the linear bearing under test, meaning they cannot simulate the actual operating conditions of the linear bearing, resulting in inaccurate test results. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a high-efficiency testing fixture for linear bearings. This solution addresses the lack of a testing fixture in the existing technology that is simple to operate, easy to install, has high efficiency in the reciprocating motion of the spindle, and can simulate the actual stress conditions of linear bearings.

[0004] To achieve the above objectives, the present invention provides a high-efficiency testing fixture for linear bearings, comprising a fixture base, a fixture shaft disposed on the fixture base, a fixture hole extending through the center of the fixture shaft along its length, a mandrel slidably disposed in the fixture hole, fixture rings disposed at both ends of the fixture hole, a receiving groove forming between the inner peripheral walls of the two fixture rings and the outer peripheral wall of the mandrel for accommodating an external linear bearing to be tested, a fixing member disposed on the fixture shaft for fixing the fixture rings and preventing the external linear bearing to be tested from dislodging from the receiving groove, a driving member disposed on the fixture base for driving the mandrel to slide along the length of the fixture hole in the fixture hole, and an application member disposed on the fixture base for applying radial load to the fixture shaft.

[0005] The advantages of adopting the above technical solution are as follows: The operator places the linear bearing to be tested in the receiving groove. At this time, the inner ring of the linear bearing to be tested is fitted on the mandrel, while its outer ring is in contact with the inner circumferential wall of the receiving groove. Then, the operator uses the fixing component to restrict the bearing to be tested and prevent it from falling out of the receiving groove. At this time, the operator starts the drive component to drive the mandrel to reciprocate along the length of the tooling hole. When the mandrel reciprocates, the linear bearing moves in conjunction. At this time, the efficient reciprocating motion of the mandrel realizes the performance test of the linear bearing. The entire operation and installation process is simple and fast, which speeds up the preparation process before testing and improves the testing efficiency. In the above technology, the receiving groove can accommodate multiple linear bearings, thereby realizing the simultaneous testing of multiple linear bearings and improving the testing efficiency. In the above technology, the setting of the application component can apply a radial load to the tooling shaft. The load torque will be transmitted to the bearing to be tested and the mandrel through the tooling shaft, thereby simulating the actual operating conditions of the linear bearing.

[0006] The present invention further comprises: a retaining edge is provided on the outer side wall of each of the two tooling rings; the inner side wall of each retaining edge is respectively abutted and fitted with the side walls of the two tooling shafts; a plurality of fixing holes are provided through each of the two retaining edges; a mating hole is provided on each side wall of the tooling shaft corresponding to each adjacent fixing hole; the plurality of mating holes correspond one-to-one with the plurality of fixing holes and are aligned; the fixing member includes a plurality of fixing rods; the plurality of fixing rods correspond one-to-one with the plurality of fixing holes; the beginning of each fixing rod is threadedly connected to its corresponding fixing hole; and the end of each fixing rod is threadedly connected to its adjacent mating hole.

[0007] The advantages of adopting the above technical solution are: when the operator needs to fix the tooling ring, the operator will thread each fixing rod into its corresponding fixing hole, and then continue to screw the fixing rod in so that each fixing rod is threaded into its corresponding mating hole, thereby fixing the tooling ring in the tooling hole and ensuring that the tooling ring will not come off the tooling hole when the linear bearing is running at high speed, thus preventing the detection from failing.

[0008] The present invention further includes: the fixing member also includes a retaining ring for closing the shaft hole opening of the tooling ring, the inner side wall of the retaining ring is fitted with the outer side wall of the fixing ring, the retaining ring has a plurality of first openings through it, the outer side wall of the fixing ring has a second opening corresponding to each of the first openings, each of the first openings is threaded with a positioning rod, and each positioning rod is threaded with its adjacent second opening.

[0009] The advantages of adopting the above technical solution are: after the operator installs the bearing to be tested, the operator connects each positioning rod to its corresponding first opening with a thread, and then continues to screw in the positioning rod so that each positioning rod is threaded into its corresponding second opening, so that the retaining ring and the fixing ring fit together. At this time, the inner circumferential wall of the retaining ring and the outer circumferential wall of the spindle are in clearance fit, thereby preventing the linear bearing from dislodging from the receiving groove and avoiding detection failure when the linear bearing is running at high speed.

[0010] The present invention further includes: a limiting ring is provided between the two tooling rings, the limiting ring is sleeved on the mandrel, and the two side walls of the limiting ring abut against the inner side walls of the two tooling rings respectively.

[0011] The advantage of adopting the above technical solution is that the limiting ring is set between the two tooling rings, thereby ensuring that the two tooling rings will not shake or even move when the bearing to be tested is running at high speed, which would affect the testing accuracy.

[0012] The present invention further includes a drive motor, wherein the output end of the drive motor is linked to the spindle.

[0013] The advantages of adopting the above technical solution are: the drive motor in the above technology can drive the spindle to perform high-speed reciprocating motion, thereby increasing the operating speed of the linear bearing, speeding up the detection process, and improving detection efficiency; the drive motor in the above technology is existing technology, so its structure and function will not be described in detail.

[0014] The present invention further comprises: a drive disk is provided on the output end of the drive motor, a drive shaft is provided on the drive disk, the drive shaft is eccentrically disposed on the drive disk, a rotating ring is rotatably disposed on the drive shaft along its axis, a linkage shaft is provided at one end of the rotating ring, a linkage groove is provided on the linkage shaft, an insert shaft is horizontally inserted in the linkage groove, a mating ring is rotatably disposed on the insert shaft, the mating ring is rotatably disposed in the linkage groove, and one end of the spindle is connected to the mating ring.

[0015] The advantages of adopting the above technical solution are as follows: When the drive motor is running, it will drive the drive disk to rotate axially. At this time, the drive shaft on the drive disk will make eccentric motion with the rotation of the drive disk, so that the drive shaft drives the rotating ring to move. There is a linkage shaft on the rotating ring, and the linkage shaft and the mandrel are linked through a mating ring. Thus, when the linkage shaft swings, it will drive the mandrel to move. The mandrel is limited by the tooling hole, so the mandrel can only make sliding motion. One rotation of the drive disk will cause the mandrel to make reciprocating motion. When the motor runs at high speed, it will drive the drive disk to make high-speed motion, thereby increasing the reciprocating motion rate of the mandrel, thereby improving the detection efficiency of the linear bearing under test and speeding up the detection process.

[0016] The invention further comprises: a sliding groove on the drive disk, a limiting shaft in the sliding groove, a limiting block threadedly connected to the limiting shaft, the drive shaft mounted on the limiting block, the limiting block having a trapezoidal radial cross-section, the sliding groove being adapted to the shape of the limiting block, two limiting plates on the drive disk, the two limiting plates being respectively located on both sides of the sliding groove, each limiting plate having a limiting hole, the two ends of the limiting shaft being threadedly connected to their respective adjacent limiting holes, and two retaining plates at both ends of the two limiting shafts, the inner peripheral walls of the two retaining plates abutting against the end faces of the limiting plates.

[0017] The advantages of adopting the above technical solution are: the drive shaft is set on the limit block, and the limit block is threadedly connected to the limit shaft. When the operator rotates the limit shaft, it will engage with the limit block threadedly. However, the limit block is restricted by the slide groove and cannot rotate. Therefore, it can only slide along its length in the slide groove. When the position of the limit block is adjusted, it will drive the position of the drive shaft to adjust, thereby realizing the change of the eccentric position of the drive shaft relative to the drive disc, and thus realizing the reciprocating motion of the spindle at different speeds. The setting of the clamping plate in the above technology ensures that the limit shaft will not disengage from the limit plate, so that only the position of the limit block changes when the limit shaft rotates.

[0018] The present invention further comprises: the applying element includes a driving cylinder disposed on a tooling base, a force-bearing shell sleeved on the tooling shaft, and the output end of the driving cylinder abutting against the force-bearing shell.

[0019] The advantages of adopting the above technical solution are: the setting of the drive cylinder in the above technology allows the operator to adjust the output torque of the drive cylinder according to the testing requirements, thereby simulating different operating conditions when the linear bearing is running; the drive cylinder in the above technology is existing technology, so its structure and function will not be described in detail. Attached Figure Description

[0020] Figure 1 This is a three-dimensional view of the present invention;

[0021] Figure 2 This is a top-view sectional view of the present invention;

[0022] Figure 3 for Figure 2 Enlarged view of part A in the middle;

[0023] Figure 4 This is a three-dimensional view of the drive motor and its connection structure in this invention. Detailed Implementation

[0024] This invention provides a high-efficiency testing fixture for linear bearings, including a fixture base 1. A fixture shaft 2 is mounted on the fixture base 1. A fixture hole 21 extends through the center of the fixture shaft 2 along its length. A mandrel 3 is slidably disposed within the fixture hole 21. Fixture rings 22 are provided at both ends of the fixture hole 21. A receiving groove 23 is formed between the inner circumferential walls of the two fixture rings 22 and the outer circumferential wall of the mandrel 3 to accommodate the linear bearing to be tested. A fixing member is provided on the fixture shaft 2 to fix the fixture rings 22 and prevent the linear bearing to be tested from dislodging from the receiving groove 23. A driving member is provided on the fixture base 1 to drive the mandrel 3 to slide within the fixture hole 21 along its length. A tooling element is provided on the fixture base 1 to... The radial load-applying component for shaft 2 includes two tooling rings 22 with flanges 24 on their outer sidewalls. The inner sidewalls of the two flanges 24 abut against the two sidewalls of the tooling shaft 2. Each flange 24 has a plurality of fixing holes 241. Each sidewall of the tooling shaft 2 has a mating hole 25 corresponding to each adjacent fixing hole 241. The mating holes 25 correspond one-to-one with the fixing holes 241 and are aligned. The fixing component includes a plurality of fixing rods 26, each corresponding one-to-one with the fixing holes 241. The beginning of each fixing rod 26 is threaded to its corresponding fixing hole 241, and the end of each fixing rod 26 is threaded to its adjacent mating hole 25. The fixing component further includes a retaining ring 4 for closing the shaft hole opening of the tooling ring 22. The inner sidewall of the retaining ring 4 is fitted against the outer sidewall of the tooling ring 22. The retaining ring 4 has several first openings 41. A second opening 221 is provided on the outer sidewall of the tooling ring 22 corresponding to each first opening 41. A positioning rod 42 is threadedly connected to each first opening 41. Each positioning rod 42 is threadedly connected to its adjacent second opening 221. A limiting ring 43 is provided between two tooling rings 22. The limiting ring 43 is sleeved on the mandrel 3. The two sidewalls of the limiting ring 43 abut against the inner sidewalls of the two tooling rings 22 respectively. The driving component includes a driving motor 5. The output end of the driving motor 5 is connected to the mandrel 3. The drive motor 5 has a drive disk 51 at its output end, a drive shaft 52 on the drive disk 51, and an eccentrically mounted drive shaft 52. A rotating ring 53 is axially mounted on the drive shaft 52, and a linkage shaft 531 is mounted at one end of the rotating ring 53. A linkage groove 532 is formed on the linkage shaft 531, and a horizontally inserted shaft 54 ​​is inserted into the linkage groove 532. A mating ring 541 is rotatably mounted on the inserted shaft 54 ​​and is rotatably positioned within the linkage groove 532. One end of the spindle 3 is connected to the mating ring 541. A sliding groove 6 is formed on the drive disk 51, and a limit shaft 61 is mounted in the sliding groove 6. A limit block 62 is threadedly connected to the limit shaft 61.The drive shaft 52 is mounted on the limiting block 62, which has a trapezoidal radial cross-section. The slide groove 6 is shaped to match the limiting block 62. Two limiting plates 63 are mounted on the drive disc 51, positioned on opposite sides of the slide groove 6. Each limiting plate 63 has a limiting hole. The two ends of the limiting shaft 61 are threadedly connected to their respective adjacent limiting holes. Each end of the two limiting shafts 61 has a retaining plate 64, whose inner circumferential walls abut against the end faces of the limiting plates 63. The applying element includes a drive cylinder 7 mounted on the tooling base 1. A force-bearing shell 71 is sleeved on the tooling shaft 2, and the output end of the drive cylinder 7 abuts against the force-bearing shell 71.

[0025] The linear bearing to be tested described in the above technology is identified as 8 in the accompanying drawings.

[0026] The foregoing has shown and described the basic principles and main features of the present invention, as well as its advantages. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the present invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope. All such changes and modifications fall within the scope of the present invention as claimed, which is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency testing fixture for linear bearings, characterized in that: The device includes a fixture base, a fixture shaft on the fixture base, a fixture hole extending through the center of the fixture shaft along its length, a mandrel slidably disposed in the fixture hole, and fixture rings at both ends of the fixture hole. A receiving groove is formed between the inner circumferential walls of the two fixture rings and the outer circumferential wall of the mandrel for accommodating an external linear bearing to be tested. A fixing member is provided on the fixture shaft to fix the fixture rings and prevent the external linear bearing to be tested from dislodging from the receiving groove. A driving member is provided on the fixture base to drive the mandrel to slide along the length of the fixture hole. An application member is provided on the fixture base to apply a radial load to the fixture shaft. The driving member includes a drive motor, the output end of which is linked to the mandrel. A drive disk is provided on the output end of the drive motor, and a drive shaft is disposed on the drive disk. The drive shaft is eccentrically disposed on the drive disk. A rotating ring is rotatably arranged along its axis. A linkage shaft is provided at one end of the rotating ring. A linkage groove is opened on the linkage shaft. An insert shaft is horizontally inserted in the linkage groove. A mating ring is rotatably arranged on the insert shaft. The mating ring is rotatably arranged in the linkage groove. One end of the mandrel is connected to the mating ring. A sliding groove is opened on the drive disk. A limit shaft is provided in the sliding groove. A limit block is threadedly connected to the limit shaft. The drive shaft is arranged on the limit block. The radial cross section of the limit block is trapezoidal. The shape of the sliding groove is adapted to the shape of the limit block. Two limit plates are provided on the drive disk. The two limit plates are respectively arranged on both sides of the sliding groove. Each of the two limit plates has a limit hole. The two ends of the limit shaft are respectively threadedly connected to their respective adjacent limit holes. Both ends of the two limit shafts are provided with retaining plates. The inner peripheral walls of the two retaining plates abut against the end faces of the limit plates.

2. The high-efficiency testing fixture for linear bearings according to claim 1, characterized in that: Both of the tooling rings have retaining edges on their outer sidewalls. The inner sidewalls of the two retaining edges abut against the two sidewalls of the tooling shaft. Each retaining edge has a plurality of fixing holes. Each sidewall of the tooling shaft has a mating hole corresponding to each of its adjacent fixing holes. The mating holes correspond one-to-one with the fixing holes and are aligned. The fixing member includes a plurality of fixing rods, each of which corresponds one-to-one with the fixing holes. The beginning of each fixing rod is threaded to its corresponding fixing hole, and the end of each fixing rod is threaded to its adjacent mating hole.

3. The high-efficiency testing fixture for linear bearings according to claim 2, characterized in that: The fastener also includes a retaining ring for closing the shaft hole opening of the tooling ring. The inner sidewall of the retaining ring is fitted to the outer sidewall of the fixing ring. The retaining ring has several first openings. The outer sidewall of the fixing ring has a second opening corresponding to each of the first openings. Each first opening is threaded with a positioning rod. Each positioning rod is threaded with its adjacent second opening.

4. The high-efficiency testing fixture for linear bearings according to claim 2, characterized in that: A limiting ring is provided between the two tooling rings. The limiting ring is sleeved on the mandrel, and the two side walls of the limiting ring abut against the inner side walls of the two tooling rings respectively.

5. The high-efficiency testing fixture for linear bearings according to claim 1, characterized in that: The applying component includes a drive cylinder mounted on a tooling base, a force-bearing shell sleeved on the tooling shaft, and the output end of the drive cylinder abutting against the force-bearing shell.

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