A forklift roller bearing simulation testing machine

Abstract

The invention discloses a forklift roller bearing simulation test machine, comprising a base plate, a bearing experiment main body part arranged on the base plate, a loading part arranged on the base plate and a PLC control system, wherein the bearing experiment main body part comprises two columns and a fork frame; the two columns are arranged on the top end of the base plate at intervals, the bottom ends of the two columns are rotatably connected to the top end of the base plate, and test tracks are fixedly connected to the opposite surfaces of the two columns; the fork frame is arranged on one side of the two columns; in the present invention, only loading mechanism one and loading mechanism two need to be controlled, and the whole can simulate the rising of the heavy object carried on the fork frame, the pause of the heavy object, the forward and backward tilting of the fork frame, the centering of the fork frame, and the descending of the heavy object, so as to complete a cycle of the actual working environment of the forklift roller bearing, and the simulated working condition of the bearing is true and accurate, and the bearing analysis data is true.

Description

Technical Field

[0001] The invention belongs to the technical field of bearing simulation test equipment, and in particular relates to a forklift roller bearing simulation test machine. Background Art

[0002] The working conditions of large forklift gantry roller bearing units and automobile generator bearings are all outer ring rotation. The forklift roller bearing model is divided into rod roller bearings or rodless roller bearings. Due to their special working conditions, the requirements for bearing life and reliability are also quite high. At present, with the continuous expansion of the demand and application scope of outer ring rotating bearings, the product quality requirements are also higher than before; therefore, it is necessary to conduct simulation tests on forklift roller bearings to ensure that the produced forklift roller bearings meet the quality requirements.

[0003] Although there are some bearing simulation test equipments to perform quality tests on roller bearings, the test quality is poor and they cannot completely simulate the working conditions of roller bearings during actual use, which results in the data of simulation tests not being realistic enough. Summary of the invention

[0004] The purpose of the present invention is to provide a forklift roller bearing simulation testing machine, aiming to solve the problems in the related art.

[0005] The technical solution adopted by the present invention is as follows:

[0006] A forklift roller bearing simulation test machine, comprising a base plate, a bearing test main body arranged on the base plate, a loading part arranged on the base plate and a PLC control system;

[0007] The main part of the bearing experiment includes two columns and a fork frame; the two columns are arranged at intervals on the top of the base plate, the bottom ends of the two columns are rotatably connected to the top of the base plate, and the test tracks are fixedly connected to the opposite surfaces of the two columns; the fork frame is arranged on one side of the two columns, and a plurality of bearing mounting seats are installed on one end surface of the fork frame facing the two columns, and a test bearing is installed on the mounting surface of each bearing mounting seat, and the plurality of test bearings are evenly arranged in the two test tracks;

[0008] The loading part comprises a loading mechanism 1 for controlling the fork frame to reciprocate along the vertical direction of the test track and a loading mechanism 2 for controlling the two columns to rotate.

[0009] Preferably, the loading mechanism 1 comprises a lifting cylinder fixedly connected to the column in a manner parallel to the column and a lifting cylinder joint fixedly connected to the piston rod of the lifting cylinder for lifting the fork frame, and the lifting cylinder is a lifting oil cylinder.

[0010] Preferably, sprockets are rotatably connected to the two end surfaces of the lifting cylinder joint along the length direction, and a chain is meshed on each of the sprockets; a cross bar is fixedly connected between the two columns, one end of the chain is fixedly connected to the cross bar, and the end of the chain away from the cross bar is fixedly connected to an end surface of the fork frame facing the two columns.

[0011] Preferably, the second loading mechanism comprises two inclined piston cylinders arranged on opposite sides of two columns, the piston rod on each piston cylinder corresponds to the side of a column and is rotatably connected thereto, a cylinder mounting seat is fixedly connected to the base plate, and one end of each piston cylinder away from the column is rotatably connected to the cylinder mounting seat; the piston cylinder is a tilted oil cylinder.

[0012] Preferably, two column supports are fixedly connected to the top end surface of the base plate at intervals, and the bottom end of the column is rotatably connected to the column support.

[0013] Preferably, the plurality of bearing mounting seats are connected to a side surface of the fork frame facing the column via screws.

[0014] Preferably, a plurality of bearing mounting holes are formed on the mounting surface of each bearing mounting seat.

[0015] Preferably, the number of the bearing mounting seats is an even number ≥2.

[0016] Preferably, a displacement limit plate is fixedly connected to the cross bar 1, a cross bar 2 is fixedly connected to the top ends of the two columns, the other end of the displacement limit plate is fixedly connected to the cross bar 2, a limit slot is provided on the displacement limit plate, a proximity switch 1 is fixedly connected to the top of the limit slot, a proximity switch 2 is fixedly connected to the lifting cylinder joint, the switch 2 is located at the bottom of the limit slot, and both the proximity switch 1 and the proximity switch 2 are electrically connected to the PLC control system.

[0017] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0018] 1. In the present invention, during the simulation test, a heavy object is loaded on the fork frame, and the bearing mounting seat on the fork frame and the test track on the column cooperate with each other. The test bearing on the bearing mounting seat can rotate on the inner and outer circles of the test track. The fork frame can be controlled to move back and forth in the vertical direction of the test track through the loading mechanism 1, and the test bearing located in the test track can reciprocate and slide in the track for testing. Then, the rotation of the two columns can be controlled by the loading mechanism 2, so that the overall components on the column (including the test bearing) can be adjusted in position. At this time, it is only necessary to control the loading mechanism 1 and the loading mechanism 2, and the overall simulation of the rise of the heavy object loaded on the fork frame - the pause of the heavy object - the tilt of the fork frame forward and backward - the return of the fork frame to the center - the descent of the heavy object can be completed, completing a cycle of the actual working environment of the forklift roller bearing. The simulated working condition of the bearing is true and accurate, and the bearing analysis data is true.

[0019] 2. In the present invention, the lifting cylinder, the lifting cylinder joint, the sprocket, the chain and the cross bar cooperate with each other. When the lifting cylinder is started, the piston rod on the lifting cylinder can push the lifting cylinder joint and the sprocket to rise, and the chain meshing with the sprocket has one end fixedly connected to the cross bar and the other end fixedly connected to the fork frame, thereby adjusting the lifting cylinder to raise and lower the fork frame in the vertical direction.

[0020] 3. In the present invention, through the cooperation between the two inclined piston cylinders and the cylinder mounting seats, the rotational orientations of the two columns can be adjusted by regulating the piston cylinders, which is convenient for simulating actual scenes.

[0021] 4. In the present invention, the bearing mounting seat is connected to the fork frame by screws, which is convenient for disassembly and replacement of the bearing mounting seat, and further convenient for replacement simulation test of the test bearing on the bearing mounting seat.

[0022] 5. In the present invention, multiple bearing mounting holes can be used to adjust the upper and lower distances between bearings according to different hole spacings, which is convenient for actual simulation testing.

[0023] 6. In the present invention, through the mutual cooperation of the displacement limit plate, the limit groove, the proximity switch 1 and the proximity switch 2, when the proximity switch 2 which moves vertically together with the lifting cylinder joint touches the proximity switch 1, the lifting cylinder stops under the control of the PLC control system, thereby ensuring the safe use of the lifting cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the structure enlarged at A in the present invention;

[0026] Figure 3 It is a three-dimensional schematic diagram of the fork frame in the present invention.

[0027] Markings in the figure: 1. Base plate; 200. Test track; 2. Post; 201. Crossbar 1; 202. Post support; 3. Fork frame; 4. Bearing mounting seat; 400. Test bearing; 5. Lifting cylinder; 6. Lifting cylinder joint; 7. Sprocket; 8. Chain; 9. Piston cylinder body; 10. Cylinder body mounting seat; 11. Bearing mounting hole; 12. Displacement limit plate; 13. Crossbar 2; 14. Limit slot; 15. Proximity switch 1; 16. Proximity switch 2. DETAILED DESCRIPTION

[0028] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0029] Example 1

[0030] Reference Figure 1-3 A forklift roller bearing simulation test machine includes a base plate 1, a bearing test main body arranged on the base plate 1, a loading part arranged on the base plate 1 and a PLC control system. The PLC control system is the same as the prior art and will not be described in detail here.

[0031] The main part of the bearing experiment includes two columns 2 and a fork frame 3; the two columns 2 are arranged at intervals on the top of the base plate 1, the bottom ends of the two columns 2 are rotatably connected to the top of the base plate 1, and two column supports 202 are fixedly connected to the top surface of the base plate 1 at intervals, and the bottom ends of the columns 2 are rotatably connected to the column supports 202;

[0032] A test track 200 is fixedly connected to the opposite surfaces of the two columns 2; a fork frame 3 is arranged on one side of the two columns 2, and a plurality of bearing mounting seats 4 are installed on one end surface of the fork frame 3 facing the two columns 2, and the number of the bearing mounting seats 4 is an even number ≥ 2, and a test bearing 400 is installed on the mounting surface of each bearing mounting seat 4, and the test bearing 400 is any one of a rod roller bearing or a rodless roller bearing, and a plurality of test bearings 400 are evenly arranged in the two test tracks 200;

[0033] The loading part includes a loading mechanism 1 for controlling the fork frame 3 to reciprocate along the vertical direction of the test track 200 and a loading mechanism 2 for controlling the two columns 2 to rotate.

[0034] In the present invention, during the simulation test, a heavy object is loaded on the fork frame 3, and the bearing mounting seat 4 on the fork frame 3 and the test track 200 on the column 2 cooperate with each other. The test bearing 400 on the bearing mounting seat 4 can rotate on the inner and outer circles of the test track 200. The fork frame 3 can be controlled to move back and forth in the vertical direction of the test track 200 through the loading mechanism 1, and the test bearing 400 located in the test track 200 can reciprocate and slide in the track for testing, and then the rotation of the two columns 2 can be controlled by the loading mechanism 2, so that the overall components on the column 2 (including the test bearing 400) can be adjusted in position. At this time, it is only necessary to control the loading mechanism 1 and the loading mechanism 2, and the overall simulation of the fork frame 3 carrying the heavy object rising-the heavy object pausing-the fork frame tilting forward and backward-the fork frame returning to the center-the heavy object descending can be completed, completing a cycle of the actual working environment of the forklift roller bearing, and the simulated working condition of the bearing is true and accurate, and the bearing analysis data is true.

[0035] Example 2

[0036] Reference Figure 1-2 , further defined on the basis of Example 1, the loading mechanism 1 includes a lifting cylinder 5 fixedly connected to the column 2 in a manner parallel to the column and a lifting cylinder joint 6 fixedly connected to the piston rod of the lifting cylinder 5 for lifting the fork frame 3, the lifting cylinder joint 6 is rotatably connected to the two end surfaces along the length direction with sprockets 7, and each sprocket 7 is meshed with a chain 8; a cross bar 201 is fixedly connected between the two columns 2, one end of the chain 8 is fixedly connected to the cross bar 201, and the end of the chain 8 away from the cross bar 201 is fixedly connected to an end surface of the fork frame 3 facing the two columns 2.

[0037] In the present invention, the lifting cylinder 5, the lifting cylinder joint 6, the sprocket 7, the chain 8 and the cross bar 201 cooperate with each other. When the lifting cylinder 5 is started, the piston rod on the lifting cylinder 5 can push the lifting cylinder joint 6 and the sprocket 7 to rise, and the chain 8 meshing with the sprocket 7 has one end fixedly connected to the cross bar 201 and the other end fixedly connected to the fork frame 3, thereby adjusting the lifting cylinder 5 to lift the fork frame 3 in the vertical direction.

[0038] Example 3

[0039] Reference Figure 1 , further defined on the basis of Example 1 or 2, the loading mechanism 2 includes two inclined piston cylinders 9 arranged on opposite sides of the two columns 2, the piston rod on each piston cylinder 9 corresponds to a side of a column 2 and is rotatably connected thereto, a cylinder mounting seat 10 is fixedly connected to the base plate 1, and one end of each piston cylinder 9 away from the column 2 is rotatably connected to the cylinder mounting seat 10.

[0040] In the present invention, through the cooperation between the two inclined piston cylinders 9 and the cylinder mounting seat 10, the rotational orientation of the two columns 2 can be adjusted by adjusting the piston cylinders 9, which is convenient for simulating actual scenes.

[0041] Example 4

[0042] Reference Figure 3 , further defined on the basis of Example 1, a plurality of bearing mounting seats 4 are connected to a side surface of the fork frame 3 facing the column 2 by screws.

[0043] In the present invention, the bearing mounting seat 4 is connected to the fork frame 3 by screws, which is convenient for disassembly, and it is convenient to disassemble and replace the bearing mounting seat 4, and then it is convenient to perform a replacement simulation test on the test bearing 400 on the bearing mounting seat 4.

[0044] Example 5

[0045] Reference Figure 3 , further defined on the basis of Example 1 or 4, a plurality of bearing mounting holes 11 are provided on the mounting surface of each bearing mounting seat 4; when the test bearing (400) is a roller bearing with a rod, the rod body of the roller bearing with a rod is inserted into the inner cavity of the bearing mounting hole 11; when the test bearing (400) is a rodless roller bearing, a mounting column is inserted into the inner cavity of the bearing mounting hole 11, and then the rodless roller bearing is inserted onto the mounting column for testing.

[0046] In the present invention, the upper and lower distances between bearings can be adjusted according to different hole spacings through a plurality of bearing mounting holes 11, which is convenient for actual simulation testing.

[0047] Example 6

[0048] Reference Figure 1-2 , further defined on the basis of Example 2, a displacement limiting plate 12 is fixedly connected to the cross bar 1 201, a cross bar 2 13 is fixedly connected to the top of the two columns 2, the other end of the displacement limiting plate 12 is fixedly connected to the cross bar 2 13, a limiting groove 14 is provided on the displacement limiting plate 12, a proximity switch 15 is fixedly connected to the top of the limiting groove 14, a proximity switch 2 16 is fixedly connected to the lifting cylinder joint 6, the proximity switch 2 16 is located at the bottom of the limiting groove 14, and the proximity switch 15 and the proximity switch 2 16 are both electrically connected to the PLC control system.

[0049] In the present invention, through the mutual cooperation of the displacement limit plate 12, the limit groove 14, the proximity switch 15 and the proximity switch 2 16, when the proximity switch 2 16 that moves vertically together with the lifting cylinder joint 6 touches the proximity switch 15, the lifting cylinder 5 stops under the control of the PLC control system, ensuring the safe use of the lifting cylinder 5.

Claims

1. A forklift roller bearing simulation test machine, comprising a base plate (1), a bearing test main body arranged on the base plate (1), a loading part arranged on the base plate (1) and a PLC control system, characterized in that: The main part of the bearing experiment comprises two columns (2) and a fork frame (3); the two columns (2) are arranged at intervals on the top of the base plate (1); the bottom ends of the two columns (2) are rotatably connected to the top of the base plate (1); and the test tracks (200) are fixedly connected to the opposite surfaces of the two columns (2); the fork frame (3) is arranged on one side of the two columns (2); a plurality of bearing mounting seats (4) are installed on one end surface of the fork frame (3) facing the two columns (2); a test bearing (400) is installed on the mounting surface of each bearing mounting seat (4); and the plurality of test bearings (400) are evenly arranged in the two test tracks (200); The loading part comprises a loading mechanism 1 for controlling the fork frame (3) to reciprocate along the vertical direction of the test track (200) and a loading mechanism 2 for controlling the two columns (2) to rotate; The plurality of bearing mounting seats (4) are connected to a side surface of the fork frame (3) facing the column (2) via screws; A plurality of bearing mounting holes (11) are formed on the mounting surface of each bearing mounting seat (4); The number of the bearing mounting seats (4) is an even number ≥ 2; Control loading mechanism 1 and loading mechanism 2 to simulate the rise of the heavy object on the fork frame - the heavy object pauses - the fork frame tilts forward and backward - the fork frame returns to the center - the heavy object descends, completing a cycle of the actual working environment of the forklift roller bearing; When the test bearing (400) is a roller bearing with a rod, the rod body of the roller bearing with a rod is inserted into the inner cavity of the bearing mounting hole (11); when the test bearing (400) is a rodless roller bearing, a mounting column is inserted into the inner cavity of the bearing mounting hole (11), and then the rodless roller bearing is inserted onto the mounting column for testing.

2. A forklift roller bearing simulation testing machine according to claim 1, characterized in that: The loading mechanism 1 comprises a lifting cylinder (5) fixedly connected to the column (2) in a manner parallel to the column and a lifting cylinder joint (6) fixedly connected to the piston rod of the lifting cylinder (5) for lifting the fork frame (3).

3. A forklift roller bearing simulation testing machine according to claim 2, characterized in that: The lifting cylinder joint (6) is rotatably connected to sprockets (7) on both end surfaces along the length direction, and each sprocket (7) is meshed with a chain (8); a cross bar (201) is fixedly connected between the two upright posts (2), one end of the chain (8) is fixedly connected to the cross bar (201), and the end of the chain (8) away from the cross bar (201) is fixedly connected to an end surface of the fork frame (3) facing the two upright posts (2).

4. A forklift roller bearing simulation testing machine according to any one of claims 1 to 3, characterized in that: The second loading mechanism comprises two inclined piston cylinders (9) arranged on opposite sides of two columns (2), the piston rod on each piston cylinder (9) corresponds to the side of a column (2) and is rotatably connected thereto, the base plate (1) is fixedly connected with a cylinder mounting seat (10), and one end of each piston cylinder (9) away from the column (2) is rotatably connected to the cylinder mounting seat (10).

5. The forklift roller bearing simulation testing machine according to claim 1, characterized in that: Two column supports (202) are fixedly connected at intervals on the top surface of the base plate (1), and the bottom end of the column (2) is rotatably connected to the column support (202).

6. The forklift roller bearing simulation testing machine according to claim 3, characterized in that: A displacement limit plate (12) is fixedly connected to the first cross bar (201), a second cross bar (13) is fixedly connected to the top ends of the two uprights (2), the other end of the displacement limit plate (12) is fixedly connected to the second cross bar (13), a limit slot (14) is provided on the displacement limit plate (12), a proximity switch (15) is fixedly connected to the top of the limit slot (14), a proximity switch (16) is fixedly connected to the lifting cylinder joint (6), the proximity switch (16) is located at the bottom of the limit slot (14), and both the proximity switch (15) and the proximity switch (16) are electrically connected to a PLC control system.

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