Linear bearing durability testing tool

Abstract

The invention discloses a linear bearing durability test tool, which comprises a cross support plate, an adapter shaft and a work table, and further comprises an intermittent driving mechanism, an intermittent driving mechanism, a driving mechanism and a driving mechanism, the rotating telescopic testing mechanism comprises two centering plates which are symmetrically fixed in the middle of the upper surface of the rotating circular truncated cone, a reciprocating cross rod arranged on the inner wall of the top of the rotating circular truncated cone and a bevel gear ring arranged over the rotating circular truncated cone, and the bevel gear ring is connected with the workbench through a gear ring fixing plate. By arranging the rotary telescopic testing mechanism, utilizing a mode of meshing transmission of a bevel gear and a bevel gear ring, driving a reciprocating cross rod to axially stretch out and draw back through an air cylinder, and enabling a telescopic shaft to drive the reciprocating cross rod to synchronously rotate through a flat key, it is ensured that a linear bearing bears dynamic friction and impact loads under a compound motion trail; the problem that durability evaluation fails due to the fact that multi-dimensional load coupling in actual application cannot be simulated in the prior art is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of linear bearing durability performance testing, in particular to a linear bearing durability performance testing tool. Background Art

[0002] Linear bearings are fundamental mechanical components that enable linear reciprocating motion. Their core structure consists of an outer ring, rolling elements, and a cage. They utilize rolling friction instead of sliding friction to achieve low-resistance, high-precision relative motion between shaft components and guide rails. These bearings are typically manufactured from metal or engineering plastics and may incorporate steel balls, rollers, or needles as rolling elements. These bearings form a kinematic pair with precision-machined guide rail surfaces. They feature low friction, high positioning accuracy, stable load capacity, and a long service life. They are widely used in automation equipment, CNC machine tools, precision instruments, and industrial robots. In high-speed, heavy-load, and high-frequency reciprocating motion scenarios, the load capacity, motion smoothness, and lifespan of linear bearings directly impact the overall performance of the mechanical system. As high-end equipment continues to demand continuous operational reliability, the need to evaluate the durability of linear bearings under complex operating conditions is becoming increasingly prominent. Scientific and quantitative testing methods are essential to systematically evaluate their ability to maintain design accuracy over long-term service life, providing data support for optimizing bearing materials, lubrication structures, and load parameters.

[0003] In the prior art, durability testing of linear bearings usually adopts a test fixture in which the bearing to be tested is directly mounted on the outside of a reciprocating shaft, and the linear motion working condition of the bearing is simulated by the periodic expansion and contraction motion of the shaft. However, this test mode can only obtain the durability parameters of the bearing under an idealized unidirectional axial motion trajectory, and cannot truly reflect the composite load conditions that the bearing may withstand in actual application scenarios. As a result, engineering and technical personnel cannot obtain durability evaluation data with engineering guidance value, which restricts the application performance verification of linear bearings in high-reliability fields such as precision machinery and automation equipment. To this end, a linear bearing durability performance test fixture is provided. Summary of the Invention

[0004] In order to overcome the deficiencies of the prior art, the present invention proposes a linear bearing durability performance testing tool.

[0005] In order to solve the above technical problems, the basic technical solutions proposed by the present invention are: A linear bearing durability test tool comprises a cross support plate, an adapter shaft, and a work table, wherein a movable opening is provided through the middle of the upper surface of the work table, and further comprises: An intermittent drive mechanism for rotating a linear bearing, the intermittent drive mechanism comprising a rotating truncated table located inside the movable opening, and a horizontal support plate mounted on the lower surface of the work table and located at the position of the rotating truncated table, a truncated table supporting column for supporting the rotating truncated table being provided inside the horizontal support plate, the truncated table supporting column corresponding to the position of the rotating truncated table, both ends of the truncated table supporting column being rotatably arranged with the horizontal support plate and the cross support plate respectively through bearings, the top end of the truncated table supporting column being connected to the bottom end of the rotating truncated table; A rotation and telescopic testing mechanism for testing the durability of linear bearings, comprising two centering plates symmetrically fixed to the middle of the upper surface of a rotating circular table, a reciprocating cross bar arranged on the inner wall of the top of the rotating circular table, and a bevel gear ring arranged directly above the rotating circular table, wherein the bevel gear ring is connected to the work table via a gear ring fixing plate.

[0006] Preferably, the intermittent drive mechanism also includes a forward ratchet fixedly mounted on the outer surface of the cone support column, and a telescopic plate guide rail fixedly mounted on the lower surface of the horizontal support plate and located at the forward ratchet position, the inner surface of the telescopic plate guide rail is fixedly provided with a telescopic plate guide rod, the outer surface of the telescopic plate guide rod is provided with a reciprocating telescopic plate, and the reciprocating telescopic plate and the telescopic plate guide rail are elastically arranged by a telescopic plate spring.

[0007] Preferably, the inner surface of the reciprocating telescopic plate is elastically provided with a reverse serrated plate at the forward ratchet position through a serrated plate spring, the reverse serrated plate is slidingly engaged with the forward ratchet, the outer surface of the reverse serrated plate is fixedly provided with a serrated plate guide rod at each serrated plate spring position, the lower surface of the reciprocating telescopic plate is fixedly provided with a bevel plate, and a truncated table rubber pad is provided in the middle of the upper surface of the rotating truncated table.

[0008] Preferably, the intermittent drive mechanism also includes a vertical guide rail fixedly mounted on the lower surface of the work table and located at the position of the inclined slot plate, the inner surface of the vertical guide rail is slidably mounted with a lifting push shaft for horizontally pushing the inclined slot plate, the outer surface of the lifting push shaft is located at one end of the inclined slot plate and extends into the inclined slot of the inclined slot plate, the lifting push shaft and the inclined slot plate are slidably arranged, the outer surface of the lifting push shaft is fixedly mounted with a hanging plate away from one end of the inclined slot plate, a pedal is fixedly mounted at the bottom of the hanging plate, and two push shaft guide rods are respectively fixed on both sides of the inner surface of the vertical guide rail.

[0009] Preferably, it also includes a vertical pressing mechanism for positioning and clamping the linear bearing, the vertical pressing mechanism includes a sliding plate guide rod fixedly mounted on the outer surface of the work table, and an L-shaped sliding plate slidably arranged on the outer surface of the sliding plate guide rod, a circular plate pressure rod is elastically arranged inside the L-shaped sliding plate and located at the rotating table position through a pressure rod spring, a pressure circular plate is rotatably mounted on the bottom of the circular plate pressure rod through a bearing, a circular plate rubber pad is provided in the middle of the lower surface of the pressure circular plate, and a pressure rod handle is fixedly provided in the middle of the top end of the circular plate pressure rod.

[0010] Preferably, the reciprocating cross bar and the center plate are elastically arranged through a cross bar spring, a telescopic shaft is slidably arranged on the inner wall of the reciprocating cross bar, and a bevel gear is fixedly installed in the middle of the end of the telescopic shaft, and the bevel gear is meshed with the bevel gear ring, and a flat key is arranged on the outer surface of the telescopic shaft.

[0011] Preferably, the rotation and telescopic testing mechanism also includes a cylinder installed at the bottom of one of the center plates, and a cross bar push-pull plate fixedly arranged on the outer surface of the reciprocating cross bar and close to the position of the cylinder, and the output end of the cylinder is connected and assembled with the outer end of the cross bar push-pull plate.

[0012] The beneficial effects of the present invention are: By setting up a rotation and telescopic test mechanism, utilizing the meshing transmission method of bevel gears and bevel gear rings, and driving the reciprocating crossbar to axially extend and retract through a cylinder, while the telescopic shaft drives the reciprocating crossbar to rotate synchronously through a flat key, it is ensured that the linear bearing can withstand dynamic friction and impact loads under a complex motion trajectory, solving the problem of durability assessment failure caused by the inability to simulate multi-dimensional load coupling in actual applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a structural schematic diagram of the rotation and telescopic testing mechanism of the present invention; Figure 3 This is a schematic diagram of the work table structure of the present invention; Figure 4 It is a schematic structural diagram of the vertical pressing mechanism of the present invention; Figure 5 Schematic diagram of the intermittent drive mechanism structure of the present invention Figure 1 ; Figure 6 Schematic diagram of the intermittent drive mechanism structure of the present invention Figure 2 ; Figure 7 Schematic diagram of the intermittent drive mechanism structure of the present invention Figure 3 .

[0014] Description of reference numerals: 100, cross support plate; 200, intermittent drive mechanism; 201, vertical guide rail; 202, round table support column; 203, round table rubber pad; 204, rotating round table; 205, telescopic plate guide rail; 206, horizontal support plate; 207, serrated plate spring; 208, inclined groove plate; 209, reverse serrated plate; 210, forward ratchet; 211, telescopic plate guide rod; 212, telescopic plate spring; 213, reciprocating telescopic plate; 214, hanging plate; 215, push shaft guide rod; 216, pedal; 217, lifting push shaft; 218, serrated plate guide rod; 3 00, adapter shaft; 400, work table; 500, vertical pressing mechanism; 501, L-shaped sliding plate; 502, pressure circular plate; 503, sliding plate guide rod; 504, circular plate rubber pad; 505, pressure rod spring; 506, circular plate pressure rod; 507, pressure rod handle; 600, rotation and telescopic testing mechanism; 601, telescopic shaft; 602, gear ring fixing plate; 603, centering plate; 604, cylinder; 605, crossbar push-pull plate; 606, reciprocating crossbar; 607, crossbar spring; 608, bevel gear ring; 609, flat key; 610, bevel gear. DETAILED DESCRIPTION

[0015] The following will be combined with the Figure 1 To the attached Figure 7 The technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort shall fall within the scope of protection of the present invention.

[0016] The present invention provides a technical solution: a linear bearing durability testing tool, including a cross support plate 100, an adapter shaft 300 and a work table 400, the work table 400 is located in the middle above the cross support plate 100, the adapter shaft 300 is arranged between the work table 400 and the cross support plate 100, and at least four adapter shafts 300 are provided. The two ends of the adapter shaft 300 are respectively connected to the work table 400 and the cross support plate 100. The device also includes: an intermittent drive mechanism 200 for rotating the linear bearing; and a rotation and telescopic testing mechanism 600 for testing the durability of the linear bearing.

[0017] Specifically, a movable opening is opened through the middle of the upper surface of the work table 400, and the intermittent drive mechanism 200 includes a rotating table 204 located inside the movable opening, and a horizontal support plate 206 installed on the lower surface of the work table 400 and located at the position of the rotating table 204. A table supporting column 202 is provided inside the horizontal support plate 206 for supporting the rotating table 204. The table supporting column 202 corresponds to the position of the rotating table 204. The two ends of the table supporting column 202 are respectively rotatably arranged with the horizontal support plate 206 and the cross support plate 100 through bearings. The top of the table supporting column 202 is connected to the bottom end of the rotating table 204. The outer surface of the rotating table 204 is clearance-matched with the inner surface of the movable opening, and a table rubber pad 203 is provided in the middle of the upper surface of the rotating table 204.

[0018] Specifically, the intermittent drive mechanism 200 also includes a forward ratchet 210 fixedly mounted on the outer surface of the truncated cone support column 202, which is used to drive the truncated cone support column 202 to rotate synchronously, and a telescopic plate guide rail 205 fixedly mounted on the lower surface of the horizontal support plate 206 and located at the position of the forward ratchet 210. The inner surface of the telescopic plate guide rail 205 is fixedly provided with a telescopic plate guide rod 211, and the outer surface of the telescopic plate guide rod 211 is provided with a reciprocating telescopic plate 213. The reciprocating telescopic plate 213 and the telescopic plate guide rail 205 are elastically connected by a telescopic plate spring 212. The telescopic plate guide rod 211 is provided with at least two, and the inner surface of the reciprocating telescopic plate 213 is elastically provided with a reverse serrated plate 209 at the position of the forward ratchet 210 through the serrated plate spring 207, which is used to cooperate with the forward ratchet 210 to push the round table support column 202 in one direction, and the reverse serrated plate 209 is slidably engaged with the forward ratchet 210. The outer surface of the reverse serrated plate 209 is fixed with a serrated plate guide rod 218 at the position of each serrated plate spring 207, and the outer end of the serrated plate guide rod 218 passes through the reciprocating telescopic plate 2 13, and extends to the outside of the reciprocating telescopic plate 213, the serrated plate spring 207 is wound on the reciprocating telescopic plate 213, and the lower surface of the reciprocating telescopic plate 213 is fixedly provided with an inclined slot plate 208, which is used to drive the reciprocating telescopic plate 213 to slide horizontally and synchronously. The intermittent drive mechanism 200 also includes a vertical guide rail 201 fixedly installed on the lower surface of the work table 400 and located at the position of the inclined slot plate 208. The inner surface of the vertical guide rail 201 is slidably installed with a lifting push shaft 217 for horizontally pushing the inclined slot plate 208. The lifting push shaft The outer surface of 217 is located in the inclined groove of the inclined groove plate 208 and extends from one end of the inclined groove plate 208. The lifting push shaft 217 is slidably arranged with the inclined groove plate 208. The outer surface of the lifting push shaft 217 and one end away from the inclined groove plate 208 is fixedly provided with a hanging plate 214. The bottom of the hanging plate 214 is fixedly provided with a pedal 216. Two push shaft guide rods 215 are respectively fixed on both sides of the inner surface of the vertical guide rail 201, which are used to provide support for the lifting push shaft 217 during the up and down sliding. The lifting push shaft 217 is slidably arranged on the outer surface of the push shaft guide rod 215.

[0019] Specifically, the device also includes a vertical pressing mechanism 500 for positioning and clamping the linear bearing. Specifically, the vertical pressing mechanism 500 includes a sliding plate guide rod 503 fixedly mounted on the outer surface of the work table 400, and an L-shaped sliding plate 501 slidably arranged on the outer surface of the sliding plate guide rod 503. A circular plate pressure rod 506 is elastically arranged inside the L-shaped sliding plate 501 and located at the position of the rotating table 204 through a pressure rod spring 505. A pressure rod pull handle 507 is fixedly arranged in the middle of the top of the circular plate pressure rod 506. A pressure circular plate 502 is rotatably mounted on the bottom of the circular plate pressure rod 506 through a bearing. A circular plate rubber pad 504 is arranged in the middle of the lower surface of the pressure circular plate 502.

[0020] Specifically, the rotating telescopic testing mechanism 600 includes two centering plates 603 symmetrically fixed to the middle of the upper surface of the rotating table 204 for limiting the linear bearing, a reciprocating crossbar 606 arranged on the inner wall of the top of the rotating table 204, and a bevel gear ring 608 arranged just above the rotating table 204. The bevel gear ring 608 is connected to the work table 400 through the gear ring fixing plate 602. The reciprocating crossbar 606 and the centering plate 603 are elastically arranged by a crossbar spring 607. The linear bearing is slidably sleeved on the outer surface of the reciprocating crossbar 606 and is located between the two centering plates 603. The inner wall of the reciprocating crossbar 606 is slidably provided with an extension spring. The telescopic shaft 601 and the bevel gear 610 are fixedly installed in the middle of the end of the telescopic shaft 601, and the bevel gear 610 is meshed with the bevel gear ring 608. The outer surface of the telescopic shaft 601 is provided with a flat key 609, which is used to make the bevel gear 610, the telescopic shaft 601 and the reciprocating cross bar 606 rotate synchronously. The rotating telescopic testing mechanism 600 also includes a cylinder 604 installed at the bottom of one of the center plates 603, and a cross bar push-pull plate 605 fixedly set on the outer surface of the reciprocating cross bar 606 and close to the position of the cylinder 604, which is used to drive the reciprocating cross bar 606 to move back and forth synchronously. The output end of the cylinder 604 is connected and assembled with the outer end of the cross bar push-pull plate 605.

[0021] According to the above, the present invention sets up a rotating telescopic test mechanism 600. When in use, the bevel gear 610 and the bevel gear ring 608 are engaged and driven, and the reciprocating crossbar 606 is driven axially by the cylinder 604. At the same time, the telescopic shaft 601 drives the reciprocating crossbar 606 to rotate synchronously through the flat key 609, ensuring that the linear bearing withstands dynamic friction and impact loads under the composite motion trajectory, solving the problem of the existing inability to simulate multi-dimensional load coupling in actual applications leading to failure of durability evaluation; the present invention sets up an intermittent drive mechanism 200. When in use, the forward ratchet 210 and the reverse sawtooth are used to The plate 209 is slidably engaged, and the pedal 216 drives the lifting push shaft 217 to drive the inclined groove plate 208 to reciprocate horizontally, so that the rotating table 204 produces intermittent rotational motion, ensuring that the linear bearing is synchronously subjected to axial telescopic load and periodic rotation load during the test; the present invention sets a vertical pressing mechanism 500. When in use, the L-shaped sliding plate 501 and the sliding plate guide rod 503 are slidably matched, and the vertical pre-tightening force is provided to the linear bearing by the pressure circular plate 502 and the circular plate rubber pad 504, thereby ensuring the contact stability between the linear bearing and the reciprocating cross bar 606 during the test.

[0022] Based on the disclosure and teachings of the above description, those skilled in the art may also make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and modifications and variations of the present invention should also fall within the scope of protection of the claims of the present invention. In addition, although certain specific terms are used in this description, these terms are only for convenience of description and do not constitute any limitation to the present invention.

Claims

1. A linear bearing durability test fixture, comprising a cross support plate (100), an adapter shaft (300) and a work table (400), characterized in that: The work table (400) has a movable opening formed through the middle of the upper surface thereof, and further comprises: An intermittent drive mechanism (200) for rotating a linear bearing, the intermittent drive mechanism (200) comprising a rotating truncated table (204) located inside a movable opening, and a horizontal support plate (206) mounted on the lower surface of a work table (400) and located at the position of the rotating truncated table (204), a truncated table support column (202) for supporting the rotating truncated table (204) is provided inside the horizontal support plate (206), the truncated table support column (202) corresponds to the position of the rotating truncated table (204), both ends of the truncated table support column (202) are respectively rotatably arranged with the horizontal support plate (206) and the cross support plate (100) through bearings, and the top end of the truncated table support column (202) is connected to the bottom end of the rotating truncated table (204); A rotation and telescopic testing mechanism (600) for testing the durability of a linear bearing, the rotation and telescopic testing mechanism (600) comprising two centering plates (603) symmetrically fixed to the middle of the upper surface of a rotating truncated table (204), a reciprocating crossbar (606) arranged on the top inner wall of the rotating truncated table (204), and a bevel gear ring (608) arranged directly above the rotating truncated table (204), wherein the bevel gear ring (608) is connected to a work table (400) via a gear ring fixing plate (602).

2. The linear bearing durability testing tool according to claim 1, characterized in that: The intermittent drive mechanism (200) further comprises a forward ratchet (210) fixedly mounted on the outer surface of the truncated cone support column (202), and a telescopic plate guide rail (205) fixedly mounted on the lower surface of the horizontal support plate (206) and located at the position of the forward ratchet (210), wherein a telescopic plate guide rod (211) is fixedly mounted on the inner surface of the telescopic plate guide rail (205), and a reciprocating telescopic plate (213) is mounted on the outer surface of the telescopic plate guide rod (211), and the reciprocating telescopic plate (213) and the telescopic plate guide rail (205) are elastically arranged via a telescopic plate spring (212).

3. The linear bearing durability testing tool according to claim 2, characterized in that: A reverse serrated plate (209) is elastically provided on the inner surface of the reciprocating telescopic plate (213) at the position of the forward ratchet (210) via a serrated plate spring (207). The reverse serrated plate (209) is slidably engaged with the forward ratchet (210). A serrated plate guide rod (218) is fixedly provided on the outer surface of the reverse serrated plate (209) at the position of each serrated plate spring (207). A chute plate (208) is fixedly provided on the lower surface of the reciprocating telescopic plate (213). A truncated table rubber pad (203) is provided in the middle of the upper surface of the rotating truncated table (204).

4. The linear bearing durability testing tool according to claim 1, characterized in that: The intermittent drive mechanism (200) further comprises a vertical guide rail (201) fixedly mounted on the lower surface of the work table (400) and located at the position of the inclined slot plate (208); a lifting push shaft (217) for horizontally pushing the inclined slot plate (208) is slidably mounted on the inner surface of the vertical guide rail (201); an outer surface of the lifting push shaft (217) is located at one end of the inclined slot plate (208) and extends into the inclined slot of the inclined slot plate (208); the lifting push shaft (217) and the inclined slot plate (208) are slidably arranged; a hanging plate (214) is fixedly mounted on the outer surface of the lifting push shaft (217) away from one end of the inclined slot plate (208); a pedal (216) is fixedly mounted at the bottom of the hanging plate (214); and two push shaft guide rods (215) are respectively fixed on both sides of the inner surface of the vertical guide rail (201).

5. The linear bearing durability testing tool according to claim 1, characterized in that: The invention also includes a vertical pressing mechanism (500) for positioning and clamping the linear bearing, wherein the vertical pressing mechanism (500) includes a sliding plate guide rod (503) fixedly mounted on the outer surface of the work table (400), and an L-shaped sliding plate (501) slidably arranged on the outer surface of the sliding plate guide rod (503), wherein a circular plate pressure rod (506) is elastically arranged inside the L-shaped sliding plate (501) and located at the position of the rotating circular table (204) through a pressure rod spring (505), and a pressure circular plate (502) is rotatably mounted on the bottom of the circular plate pressure rod (506) through a bearing, and a circular plate rubber pad (504) is arranged in the middle of the lower surface of the pressure circular plate (502), and a pressure rod handle (507) is fixedly arranged in the middle of the top of the circular plate pressure rod (506).

6. The linear bearing durability testing tool according to claim 1, characterized in that: The reciprocating crossbar (606) and the center plate (603) are elastically arranged via a crossbar spring (607); a telescopic shaft (601) is slidably arranged on the inner wall of the reciprocating crossbar (606); a bevel gear (610) is fixedly installed at the middle of the end of the telescopic shaft (601); the bevel gear (610) is meshed with the bevel gear ring (608); and a flat key (609) is arranged on the outer surface of the telescopic shaft (601).

7. The linear bearing durability testing tool according to claim 6, characterized in that: The rotation and telescopic testing mechanism (600) further comprises a cylinder (604) mounted on the bottom of one of the center plates (603), and a crossbar push-pull plate (605) fixedly arranged on the outer surface of the reciprocating crossbar (606) and close to the position of the cylinder (604), wherein the output end of the cylinder (604) is connected and assembled with the outer end of the crossbar push-pull plate (605).

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