Bearing durability experiment tool

Abstract

The utility model provides a bearing durability experiment tooling, including loading shaft and applying axial force to the power portion of loading shaft, the power portion includes testboard, impact shaft, transmission shaft, clamping seat and swing control mechanism, the top of testboard is connected with the portal frame, the impact shaft is horizontally arranged and is in transverse sliding connection with the portal frame, the transmission shaft is connected with the portal frame, and the swing control mechanism is connected with the portal frame. The two ends of the impact shaft are fixedly connected with connectors, the transmission shaft is transversely connected with the door-shaped frame in a sliding mode, the transmission shaft is located on one side of the impact shaft and is parallel to the impact shaft, and the transmission shaft is axially and elastically connected with an impact plate in a sliding mode. Through the arrangement of the transmission shaft, the impact shaft, the impact plate, the buffer spring, the door-shaped frame, the swing control mechanism and the clamping seat, the tool has the function of applying bidirectional impact force to the loading shaft, is convenient for endurance test data of axial bidirectional impact of the bearing, and can test two sets of tools for placing the bearing at the same time; and the bearing testing efficiency and the testing accuracy are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of bearing durability testing, in particular to a bearing durability testing tool. Background Art

[0002] The existing bearing endurance life test fixture design usually adopts the mode of companion test bearing plus test bearing, in which the companion test bearing is in the middle, and its function is to transmit the radial force borne by the test bearing, and the test bearing is arranged at both ends of the companion test bearing. The test bearings are respectively installed on the test benches on both sides through end bushings, and are connected and rotated together through a core shaft. This test fixture applies axial thrust on the end bushing to transmit the axial force to the bearing to be tested. Since the end bushing is fixedly connected to the test bench, the cooperation between the end bushing and the test bench will consume and absorb part of the thrust, thereby causing the force of the hull on the test bearing to be inconsistent with the actual loading force.

[0003] To this end, publication number CN219657166U discloses a bearing durability test tool, including a base, a rotating shaft, a loading shaft, a bearing assembly to be tested arranged in the base, and a test bearing assembly arranged in the base, wherein a mounting groove is provided in the middle of the base, and the mounting groove is open, and the test bearing assemblies are arranged in pairs on both sides of the mounting groove, and the rotating shaft is sleeved on the paired test bearing assemblies, and the bearing assembly to be tested is arranged in the mounting groove and sleeved on the rotating shaft, and one end of the loading shaft is provided with a plurality of connecting rods along its circumference, and the plurality of connecting rods pass through the base and are fixedly connected to the bearing assembly to be tested, and are directly fixedly connected to the mounting seat through the connecting rods, so that the axial force is directly transmitted to the bearing to be tested, and the bearing assembly to be tested is sleeved on the rotating shaft without contacting other supporting surfaces, and there will be no axial force transmission loss, thereby ensuring the accuracy of the test loading force.

[0004] The specification of the above-mentioned prior art records the loading scheme of "the other end of the loading shaft is used to connect to a driving mechanism such as a piston or a cylinder," that is, the implementation scheme of loading the loading shaft through a direct-drive structure such as a piston or a cylinder still has the following shortcomings: 1. If the output shaft of the piston or the cylinder and the loading shaft are not tightly connected, and the loading shaft is loaded only by impact, the loading shaft can only be subjected to a unidirectional axial force and cannot generate a bidirectional impact force, thereby the axial durability test of the bearing is not comprehensive and the performance of the reaction bearing cannot be accurately measured; 2. One loading shaft can only correspond to one direct-drive structure such as a piston or a cylinder, which has the defect of poor efficiency of the durability test. In order to obtain the average value of the bearing endurance test, more tooling components in the prior art need to be put into use.

[0005] To this end, the utility model provides a bearing durability test tool. Utility Model Content

[0006] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a bearing durability test tool to solve the problems raised in the above-mentioned background technology. The present invention has the function of applying bidirectional impact force to the loading shaft, which is convenient for the axial bidirectional impact durability test data of the bearing, and can test two sets of tooling for placing bearings at the same time, thereby improving the bearing test efficiency and test accuracy.

[0007] In order to achieve the above-mentioned purpose, the utility model is implemented through the following technical scheme: a bearing durability test tool, including a loading shaft and a power unit that applies axial force to the loading shaft, the power unit including a test bench, an impact shaft, a transmission shaft, a clamping seat and a swing control mechanism, the top of the test bench is connected to a portal frame, the impact shaft is horizontally arranged and is laterally slidably connected to the portal frame, both ends of the impact shaft are fixedly connected with connecting heads, the transmission shaft and the portal frame are laterally slidably connected, the transmission shaft is located on one side of the impact shaft and the two are parallel, an impact plate is axially elastically slidably connected to the transmission shaft, the outer wall of the impact shaft is provided with baffles located on both sides of the impact plate, the clamping seat is located on both sides of the portal frame and is opposite to the impact shaft, and the swing control mechanism is used to control the reciprocating motion of the transmission shaft.

[0008] Furthermore, a retaining ring located inside the portal frame and close to both sides of the portal frame is welded on the transmission shaft, and a buffer spring located on both sides of the impact plate is sleeved on the transmission shaft, and both ends of the buffer spring are respectively against the retaining ring and the impact plate.

[0009] Furthermore, both ends of the transmission shaft are welded to a transmission plate located on one side of the portal frame, and the swing control mechanism includes a connecting arm, one side of the connecting arm is rotatably connected to one side of the portal frame and one end of the connecting arm is welded to a shift shaft that rotates and slides with the transmission plate.

[0010] Furthermore, a positioning plate is welded on one side of the portal frame, a positioning sleeve is welded on one side of the positioning plate, a positioning shaft rotatably connected to the positioning sleeve is welded on one side of the connecting arm, and a rectangular hole that matches the clearance of the shifting shaft is opened on one side of the transmission plate.

[0011] Furthermore, the swing control mechanism includes a drive shaft, which is rotatably connected to the crossbeam at the top of the portal frame. A cantilever is welded to one end of the drive shaft, and the cantilever is provided with a roller. A waist-shaped hole that matches the gap with the roller is opened on one side of the connecting arm.

[0012] Furthermore, the clamping seat is a U-shaped seat structure and locking bolts are screwed through both sides of the clamping seat.

[0013] Furthermore, a connector is welded to one end of the loading shaft, and the connector is a flange plate.

[0014] The beneficial effects of the utility model are as follows:

[0015] 1. The utility model is provided with a portal frame, on which an impact shaft is slidably connected, and two ends of the impact shaft are respectively connected to a loading shaft, and then the portal frame is slidably connected to a transmission shaft, and the transmission shaft is axially elastically slidably connected to an impact plate, and a baffle is arranged on the impact shaft. When the transmission shaft reciprocates, the impact plate will impact the baffle, and the baffle will drive the impact shaft to generate a reciprocating impact force, and this impact force can apply tension and induction to the loading shaft, thereby facilitating the subsequent accurate acquisition of the durability data of the bearing under axial bidirectional impact.

[0016] 2. Both ends of the impact shaft provided in the utility model are connected to a loading shaft, and the axial reciprocating motion of the transmission shaft will exert a bidirectional elastic impact force on the impact plate, so that the device can perform axial loading tests on two loading shafts at a time, thereby improving the efficiency of the durability test and facilitating the acquisition of the average value of the durability test.

[0017] 3. The utility model is provided with a swing control mechanism, which is used to control the axial reciprocating motion of the transmission shaft, so as to facilitate axial cyclic loading of the two loading shafts and has the advantage of higher automatic loading control. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural schematic diagram of a bearing durability test tooling of the utility model;

[0019] Figure 2 It is a schematic diagram after enlarging the local area "a" in soil 1;

[0020] Figure 3 This is a plan view of the connection between a bearing durability test fixture and a loading shaft according to the utility model;

[0021] In the figure: 1, loading shaft; 2, power unit; 21, test bench; 211, door frame; 2111, positioning plate; 21111, positioning sleeve; 2112, crossbeam; 22, impact shaft; 221, connector; 222, baffle; 23, transmission shaft; 231, impact plate; 232, baffle ring; 233, transmission plate; 2331, rectangular hole; 234, buffer spring; 24, swing control mechanism; 241, connecting arm; 2411, dial shaft; 2412, positioning shaft; 2413, waist hole; 242, drive shaft; 2421, cantilever; 24211, roller; 25, clamping seat; 251, locking bolt. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0023] See also Figures 1 to 3The utility model provides a technical solution: a bearing durability test tool, including a loading shaft 1 and a power unit 2 for applying axial force to the loading shaft 1. The loading shaft 1 is a structure in the prior art mentioned in the background technology. The test tool in the prior art includes a base for placing the bearing assembly to be tested, and a loading shaft 1 and a rotating shaft are arranged at both ends of the base. The function of the loading shaft 1 is to indirectly apply axial impact force to the bearing. It should be noted that the loading shaft 1 cannot be displaced, so directly applying thrust to the loading shaft 1 is difficult to accurately reflect the durability effect of the bearing subjected to axial impact.

[0024] Therefore, in the present technical solution, the power unit 2 is provided to apply a bidirectional instantaneous impact force to the loading shaft 1, which has the advantage of truly simulating the working conditions of the bearing.

[0025] The power unit 2 includes a test bench 21, an impact shaft 22, a transmission shaft 23, a clamping seat 25 and a swing control mechanism 24, wherein the clamping seat 25 is used to clamp the base in the prior art, specifically, the clamping seat 25 is located on both sides of the door frame 211 and opposite to the impact shaft 22. The clamping seat 25 is a U-shaped seat structure and locking bolts 251 are screwed through both sides thereof. After the base is placed in the U-shaped groove of the clamping seat 25, when the locking bolts 251 are tightened, the locking bolts 251 will squeeze the base, so that the base and the clamping seat 25 are fixedly connected.

[0026] Specifically, the top of the test bench 21 is connected with a portal frame 211, and the impact shaft 22 is horizontally arranged and slidably connected with the portal frame 211. The specific implementation structure is that guide sleeves are welded on both sides of the portal frame 211 and are sleeved on the outside of the impact shaft 22. The two ends of the impact shaft 22 are fixedly connected with connectors 221, and preferably, one end of the loading shaft 1 is also welded with a connector 221, and the connector 221 is a flange plate. The two ends of the impact shaft 22 are fastened to the loading shaft 1 through flanges and bolts. When the impact shaft 22 is subjected to a bidirectional impact force, the impact force will be transmitted to the loading shafts 1 on both sides at the same time.

[0027] The transmission shaft 23 and the door frame 211 are connected in a transverse sliding manner. The transmission shaft 23 is located on one side of the impact shaft 22 and the two are parallel. The transmission shaft 23 is located above the impact shaft 22. In specific implementation, guide holes that slide with the transmission shaft 23 can be opened on both sides of the door frame 211. An impact plate 231 is axially elastically slidably connected to the transmission shaft 23. The outer wall of the impact shaft 22 is provided with baffles 222 located on both sides of the impact plate 231. When the transmission shaft 23 reciprocates, the baffles 222 will cyclically hit the baffles 222 on both sides thereof under the action of elastic force. Specifically, a retaining ring 232 is welded on the transmission shaft 23 and is located inside the portal frame 211 and close to the two sides of the portal frame 211. A buffer spring 234 is sleeved on the transmission shaft 23 and is located on both sides of the impact plate 231. The two ends of the buffer spring 234 are respectively against the retaining ring 232 and the impact plate 231, wherein the impact plate 231 is provided with a square hole that slides with the transmission shaft 23. The buffer spring 234 applies an elastic thrust to the impact plate 231. At the same time, the buffer spring 234 plays a role in buffering the impact force to avoid damage to the test tooling.

[0028] The swing control mechanism 24 is used to control the reciprocating motion of the transmission shaft 23. Specifically, a transmission plate 233 located on one side of the door frame 211 is welded and connected at both ends of the transmission shaft 23, and the transmission plate 233 is groove-shaped. The swing control mechanism 24 includes a connecting arm 241, one side of the connecting arm 241 is rotatably connected to one side of the door frame 211, and one end of the connecting arm 241 is welded with a shifting shaft 2411 that rotates and slides with the transmission plate 233. When the connecting arm 241 swings, it pushes the transmission plate 233 to reciprocate through the shifting shaft 2411, thereby driving the transmission shaft 23 to reciprocate axially.

[0029] Specifically, a positioning plate 2111 is welded on one side of the door frame 211, a positioning sleeve 21111 is welded on one side of the positioning plate 2111, a positioning shaft 2412 rotatably connected to the positioning sleeve 21111 is welded on one side of the connecting arm 241, and a rectangular hole 2331 that is clearance-matched with the shift shaft 2411 is opened on one side of the transmission plate 233. When the shift shaft 2411 pushes the transmission plate 233, it will move up and down in the rectangular hole 2331.

[0030] In this embodiment, the swing control mechanism 24 includes a drive shaft 242, which is rotatably connected to the crossbeam 2112 at the top of the door frame 211. A positioning hole rotatably connected to the drive shaft 242 can be opened on the crossbeam 2112, and then a control motor is installed on one side of the crossbeam 2112. The output shaft of the control motor is fixedly connected to the drive shaft 242, and the control motor can drive the drive shaft 242 to rotate when it rotates. A cantilever 2421 is welded to one end of the drive shaft 242, and a roller 24211 is set on the cantilever 2421. A waist-shaped hole 2413 with a clearance fit with the roller 24211 is opened on one side of the connecting arm 241. When the drive shaft 242 rotates, the roller 24211 will roll in the waist-shaped hole 2413 and then push the connecting arm 241 to swing back and forth.

[0031] Working principle: First, the bases on the two fixtures in the prior art are placed in the two clamping seats 25 respectively, and then the loading shaft 1 and the impact shaft 22 are fastened and connected through the connector 221, and then the locking bolt 251 is tightened, and the base is fixed at this time. The drive shaft 242 is controlled to rotate, the cantilever 2421 moves, and the roller 24211 pushes the connecting arm 241 to swing back and forth. In this process, due to the transmission effect of the transmission plate 233, the transmission shaft 23 swings back and forth, and the impact plate 231 is pushed and impacts the baffles 222 on both sides thereof back and forth. At the same time, the buffer springs 234 on both sides of the impact plate 231 will be retracted and retracted in turn. When the impact plate 231 impacts the baffle 222, the bidirectional impact force of the impact shaft 22 is transmitted to the loading shaft 1, realizing the axial bidirectional impact test of the bearing in the fixture in the prior art.

[0032] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A bearing durability test tool, comprising a loading shaft (1) and a power unit (2) for applying an axial force to the loading shaft (1), characterized in that: The power unit (2) comprises a test bench (21), an impact shaft (22), a transmission shaft (23), a clamping seat (25) and a swing control mechanism (24); the top of the test bench (21) is connected to a portal frame (211); the impact shaft (22) is arranged horizontally and is slidably connected to the portal frame (211); two ends of the impact shaft (22) are fixedly connected to connectors (221); the transmission shaft (23) and the portal frame (211) are slidably connected; the transmission shaft (23) is located on one side of the impact shaft (22) and the two are parallel; an impact plate (231) is axially elastically slidably connected to the transmission shaft (23); baffles (222) located on both sides of the impact plate (231) are arranged on the outer wall of the impact shaft (22); the clamping seat (25) is located on both sides of the portal frame (211) and is opposite to the impact shaft (22); and the swing control mechanism (24) is used to control the reciprocating motion of the transmission shaft (23).

2. A bearing durability test tool according to claim 1, characterized in that: A retaining ring (232) located inside the portal frame (211) and close to two sides of the portal frame (211) is welded on the transmission shaft (23); a buffer spring (234) located on two sides of the impact plate (231) is sleeved on the transmission shaft (23); two ends of the buffer spring (234) are respectively against the retaining ring (232) and the impact plate (231).

3. The bearing durability test tool according to claim 1, characterized in that: The two ends of the transmission shaft (23) are welded to a transmission plate (233) located on one side of the door frame (211); the swing control mechanism (24) comprises a connecting arm (241); one side of the connecting arm (241) is rotatably connected to one side of the door frame (211) and one end of the connecting arm (241) is welded to a shifting shaft (2411) that is rotatably and slidably matched with the transmission plate (233).

4. The bearing durability test tool according to claim 3, characterized in that: A positioning plate (2111) is welded to one side of the door frame (211), a positioning sleeve (21111) is welded to one side of the positioning plate (2111), a positioning shaft (2412) rotatably connected to the positioning sleeve (21111) is welded to one side of the connecting arm (241), and a rectangular hole (2331) is provided on one side of the transmission plate (233) to be clearance-matched with the shifting shaft (2411).

5. The bearing durability test tool according to claim 3, characterized in that: The swing control mechanism (24) comprises a drive shaft (242), the drive shaft (242) being rotatably connected to a crossbeam (2112) at the top of the portal frame (211), a cantilever (2421) being welded to one end of the drive shaft (242), a roller (24211) being provided on the cantilever (2421), and a waist-shaped hole (2413) being clearance-matched with the roller (24211) being provided on one side of the connecting arm (241).

6. The bearing durability test tool according to claim 1, characterized in that: The clamping seat (25) is a U-shaped seat structure and has locking bolts (251) passing through and screwed on both sides thereof.

7. The bearing durability test tool according to claim 1, characterized in that: A connector (221) is also welded to one end of the loading shaft (1), and the connector (221) is a flange plate.

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