A fully automatic grinding device for the bearing holes of an axle box

Abstract

The present invention discloses a fully automatic grinding device for the bearing hole of an axle box, comprising: a grinding robot and a sliding table connected to the grinding robot; the sliding table is used for loading the axle box, and it includes: a grinding sliding table base, a guide rail, a rodless cylinder, a grinding sliding table assembly, a sliding table guide rail bottom plate, a grinding positioning cam and a pressure plate cam frame; the sliding table guide rail bottom plate is arranged on the grinding sliding table base; the guide rail, the rodless cylinder and the pressure plate cam frame are arranged on the sliding table guide rail bottom plate; the grinding sliding table assembly is movably arranged on the guide rail and is used for fixing the axle box, and the rodless cylinder can push the grinding sliding table assembly to the grinding position; the grinding positioning cam is arranged on the pressure plate cam frame. The whole process of the present invention does not require manual operation, the standardization degree of the maintenance process is high, it gets rid of the previous dependence on manual experience and skills, and solidifies the grinding process in the form of a special device and a standard process.

Description

Technical Field

[0001] The present invention relates to a grinding device, and particularly to a fully automatic grinding device for the bearing hole of an axle box. Background Art

[0002] During the maintenance of rail transit vehicles such as EMUs, locomotives, vehicles, and subways, the inspection of the axle box is a necessary item for the inspection of the vehicle running gear.

[0003] Among them, the grinding of the inner hole at the bearing end of the axle box is a necessary link in equipment maintenance. At present, this grinding station is manually operated, and the operation is completed by manually holding a grinding machine. The working environment is extremely poor, the labor intensity of the operators is relatively high, the degree of control of the process is relatively low, and the grinding mainly depends on the experience and skills of the workers. After grinding, manual inspection is carried out to ensure the grinding result. In view of the above problems, it is urgent to adopt automated equipment to improve the working environment. Summary of the Invention

[0004] The purpose of the present invention is to provide a fully automatic grinding device for the bearing hole of an axle box, which does not require manual operation throughout the process, has a high degree of standardization in the maintenance process, gets rid of the previous dependence on manual experience and skills, and solidifies the grinding process in the form of a special device and a standard process.

[0005] In order to achieve the above purpose, the present invention is realized through the following technical solutions:

[0006] A fully automatic grinding device for the bearing hole of an axle box, the axle box is provided with a bearing end, an axle box node end, and an axle box convex end, and the axle box convex end is arranged on one side of the bearing end. The device is characterized by including: a grinding robot and a sliding table connected to the grinding robot;

[0007] The sliding table is used to load the axle box and includes:

[0008] A grinding sliding table base, a guide rail, a rodless cylinder, a grinding sliding table assembly, a sliding table guide rail bottom plate, a grinding positioning cam, and a pressure plate cam frame;

[0009] The sliding table guide rail bottom plate is arranged on the grinding sliding table base;

[0010] The guide rail, the rodless cylinder, and the pressure plate cam frame are arranged on the sliding table guide rail bottom plate;

[0011] The grinding sliding table assembly is movably arranged on the guide rail and is used to fix the axle box, and the rodless cylinder can push the grinding sliding table assembly to the grinding position;

[0012] The grinding positioning cam is arranged on the pressure plate cam frame.

[0013] The grinding robot includes:

[0014] A robot mounting base;

[0015] A robotic arm disposed on a robot mounting base;

[0016] A grinding head disposed at the end of the robotic arm.

[0017] The grinding head includes:

[0018] A grinding head flange connecting seat, which is connected to the robotic arm;

[0019] A motor fixing seat, which is connected to the grinding head flange connecting seat;

[0020] A servo motor, which is disposed on the motor fixing seat;

[0021] A coupling, a rotating shaft and a brush fixing shaft are sequentially connected and arranged. The coupling is connected to the servo motor, and the brush fixing shaft is connected to a brush.

[0022] The grinding head further includes:

[0023] A pair of first bearings, which are sleeved on the rotating shaft and used to support the rotation of the rotating shaft;

[0024] A grinding sleeve, which is connected to the motor fixing seat and sleeved outside the coupling and the rotating shaft.

[0025] The sliding table further includes:

[0026] A grinding protective cover, a sliding table stop block and a grinding dust suction box;

[0027] The grinding protective cover is disposed at one end of the grinding sliding table base;

[0028] The sliding table stop block is disposed on the sliding table guide rail bottom plate to block the grinding sliding table assembly;

[0029] The grinding dust suction box is disposed on the grinding sliding table base and is close to the grinding protective cover.

[0030] The grinding sliding table assembly includes:

[0031] A sliding table moving bottom plate, which is connected to the rodless cylinder. The sliding table moving bottom plate is respectively provided with a shaft box node end positioning point corresponding to the shaft box node end and a bearing end positioning hole corresponding to the bearing end;

[0032] At least one clamping assembly, which is symmetrically disposed on both sides of the bearing end positioning hole. The clamping assembly includes a pair of pressing plates, and the pressing plates are respectively installed on the sliding table moving bottom plate through first precision reamed bolts, and the pressing plates can rotate around the first precision reamed bolts;

[0033] A spring, which is connected between the two pressing plates;

[0034] A second bearing provided at one end of the pressing plate, the second bearing being in contact with the grinding positioning cam, and the second bearing rotating along the surface of the grinding positioning cam, so that after the pressing plate rotates a certain angle, the other end thereof presses against the convex end of the axle box.

[0035] The grinding slide assembly further includes:

[0036] A guide wheel provided at the other end of the pressing plate for pressing against the convex end of the axle box;

[0037] A plurality of slide table pads distributed around the slide table moving bottom plate.

[0038] Compared with the prior art, the present invention has the following advantages:

[0039] This device realizes the upgrade of the axle box grinding station from manual operation to unmanned fully automated grinding operation, and the whole process is automatically completed without manual labor.

[0040] This device is configured with a double grinding station, which cooperates with the robot manipulator. After the axle box on station A is processed, the axle box on station B is continuously processed, improving the utilization rate of the equipment, accelerating the maintenance operation rhythm, and increasing the daily maintenance volume of axle box grinding.

[0041] This device can realize the automation of the whole maintenance process, and the process parameter standards in the grinding process are controllable without personnel intervention, improving the standardization degree of the maintenance operation and more effectively ensuring the maintenance quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 is a schematic diagram of the overall structure of a fully automatic grinding device for the bearing hole of an axle box according to the present invention;

[0043] Figures 2a - 2b is a schematic diagram of the structure of the grinding robot according to the present invention;

[0044] Figures 3a - 3c is a schematic diagram of the structure of the grinding head;

[0045] Figures 4a - 4c is a schematic diagram of the structure of the slide table;

[0046] Figures 5a - 5d is a schematic diagram of the structure of the grinding slide assembly;

[0047] Figures 6a - 6c is a schematic diagram of the structure of the axle box;

[0048] Figure 7 is a schematic diagram of the contact between the second bearing and the grinding positioning cam;

[0049] Figure 8 is a schematic diagram of the principle of the pressing plate pressing. Detailed implementation mode

[0050] The present invention will be further described below in conjunction with the accompanying drawings by elaborating in detail a preferred specific embodiment.

[0051] As shown in Figure 1 , a full-automatic grinding device for the bearing hole of an axle box includes: a grinding robot 16 and a sliding table 17 connected to the grinding robot 16. The axle box 20 is placed on the sliding table 17, and the grinding robot 16 grinds the bearing hole 42 of the axle box. The axle box 20 is provided with a bearing end 43, an axle box node end 44, and an axle box convex end 45. The axle box convex end 45 is arranged on one side of the bearing end and is disc-shaped (see Figures 6a - 6c ).

[0052] As shown in Figures 2a - 2b , the grinding robot 16 includes: a robot mounting base 2; a robot manipulator 1 arranged on the robot mounting base 2; and a grinding head 3 arranged at the end of the robot manipulator. Further, the above-mentioned robot manipulator 1 is a 20i robot, which is a hollow wrist model that can simply and conveniently handle user cables and a model with a high allowable moment of inertia wrist that can handle large workpieces; the above-mentioned robot mounting base is fixed to the ground with M30 bolts. The grinding head is used to grind the bearing hole 42 of the axle box 20.

[0053] As shown in Figures 3a - 3c , the above-mentioned grinding head 3 includes: a grinding head flange connection seat 4, which is connected to the robot manipulator 1; a motor fixing seat 14, which is connected to the grinding head flange connection seat 4; a servo motor 13, which is arranged on the motor fixing seat 14; a coupling 8, a rotating shaft 11, and a brush fixing shaft 10 connected in sequence. The coupling 8 is connected to the servo motor 13, and the brush fixing shaft 10 is connected to the brush 7; a pair of first bearings 12, which are sleeved on the rotating shaft 11 and used to support the rotation of the rotating shaft 11; a grinding sleeve 5, which is connected to the motor fixing seat 14 and sleeved outside the coupling 8 and the rotating shaft 11; the grinding head 3 further includes: a locking nut 9 and a rotating shaft sleeve 6. The locking nut 9 is arranged on one side of the upper first bearing 12 and used to lock the first bearing 12, and the rotating shaft sleeve is arranged on one side of the lower first bearing 12 and used to lock the lower first bearing 12.

[0054] Specifically, the above-mentioned grinding sleeve 5 is used to connect to the motor fixing seat 14 to protect the coupling 8, the locking nut 9, and the rotating shaft 11. The coupling 8 transmits the force and torque of the servo motor. The above-mentioned brush 7 is used to grind the bearing hole 42 of the axle box 20.

[0055] As shown in Figures 4a - 4cAs shown, the sliding table 17 is used to load the axle box 20 and includes: a grinding sliding table base 15, a guide rail 18, a rodless cylinder 19, a grinding sliding table assembly 22, a sliding table guide rail bottom plate 24, a grinding positioning cam 26, and a pressing plate cam bracket 27; the sliding table guide rail bottom plate 24 is arranged on the grinding sliding table base 15; the guide rail 18, the rodless cylinder 19, and the pressing plate cam bracket 27 are arranged on the sliding table guide rail bottom plate 24; the grinding sliding table assembly 22 is movably arranged on the guide rail 18 and is used to fix the axle box 20, and the rodless cylinder 19 can push the grinding sliding table assembly 22 to the grinding position; the grinding positioning cam 26 is arranged on the pressing plate cam bracket 27.

[0056] The sliding table further includes: a grinding protective cover 21, a sliding table stop block 23, and a grinding dust suction box 25; the grinding protective cover 21 is arranged at one end of the grinding sliding table base 15; the sliding table stop block 23 is arranged on the sliding table guide rail bottom plate 24 to block the grinding sliding table assembly 22 and prevent the grinding sliding table assembly 22 from sliding off the grinding sliding table base 15; the grinding dust suction box 25 is arranged on the grinding sliding table base 15 and is close to the grinding protective cover 21 to collect the powder ground from the axle box.

[0057] As Figures 5a - 5d The grinding sliding table assembly includes: a sliding table moving bottom plate 28, which is connected to the rodless cylinder 19. An upper mounting block for the rodless cylinder 30 is arranged on the sliding table moving bottom plate 28, and the upper mounting block for the rodless cylinder 30 is connected to the rodless cylinder 19. The sliding table moving bottom plate 28 is respectively provided with a positioning point 40 for the axle box node end corresponding to the axle box node end 44 and a bearing end positioning hole 282 corresponding to the bearing end; a pair of clamping assemblies, the clamping assemblies are symmetrically arranged on both sides of the bearing end positioning hole 282, and each clamping assembly includes a pair of pressing plates 34. The pressing plates 34 are respectively installed on the sliding table moving bottom plate through first precision reamed bolts 38, and the pressing plates can rotate around the first precision reamed bolts 38; a spring 33, which is connected between the two pressing plates; a pair of grinding sliding table shaft positioning blocks 29, which are used to position the bearing end 43 of the axle box. A second bearing 36 is arranged at one end of the pressing plate. When the rodless cylinder 19 drives the grinding sliding table assembly 22 to move to the grinding position, the grinding positioning cam is arranged between the pair of second bearings 36, and the second bearing 36 contacts the grinding positioning cam 26 (see Figure 7 ). The above-mentioned second bearing 36 moves as the grinding sliding table assembly 22 moves, and the second bearing 36 rotates along the surface of the grinding positioning cam 26, so that after the pressing plate rotates a certain angle, the gap a at one end of the two pressing plates becomes larger, and the gap b between the other ends of the two pressing plates becomes smaller, clamping the convex end of the axle box (see Figure 8 ).

[0058] The described grinding slide assembly further includes: a guide wheel 41, which is arranged at the other end of the pressing plate 34 and is used to press against the convex end 45 of the axle box; a plurality of slide pads 31, which are distributed around the slide moving bottom plate and play a role in preventing the grinding slide assembly 22 from tipping over.

[0059] Further, second precision reamed bolts 32 are respectively arranged at the two ends of the pressing plate. Both ends of the spring 33 are installed on the second precision reamed bolts 32 and are used to make the pressing plate 34 return to its original position after the axle box 20 is removed from the grinding slide assembly 22. The slide positioning baffle 39 is arranged in the middle of the pressing plate between the second bearing and the first precision reamed bolt to limit the pressing plate 34 and prevent it from being less than the preset angle. The second bearing 36 is arranged on the bushing 35, and the described second bearing 36 and the bushing 35 are fixed to the third precision reamed bolt 37.

[0060] In the application of the present invention, a manipulator with a moving function on the maintenance line places the axle box 20 on the slide 17; the start button of the rodless cylinder 19 on the slide 17 is pressed, and the grinding slide assembly 22 drives the axle box to move to the grinding position; the robot manipulator arm 1 rotates to drive the grinding head 3 to move to the bearing hole 42 of the axle box 20; the servo motor 13 on the grinding head 3 is started to grind the bearing hole 42 of the axle box; after the bearing hole 42 of the axle box 20 at one station is ground, the grinding robot 16 grinds the bearing hole 42 of the axle box 20 at another station; at the same time, the grinding slide assembly 22 at the station returns to its original position; the manipulator with a moving function on the maintenance line takes away the axle box 20 and places it on the assembly line.

[0061] It should be noted that there are the following positioning points for the axle box 20:

[0062] 1. When the axle box 20 is placed on the slide 17 by the robot manipulator, the positioning point of the axle box node end 44 is at the axle box node end positioning point 40, and the positioning point of the bearing end 43 is at the grinding slide shaft positioning block 29.

[0063] 2. During the grinding process of the equipment, in order to prevent the axle box 20 from shaking, it is positioned and pressed at the bearing end positioning hole 282.

[0064] In summary, the full-automatic grinding device for the bearing hole of the axle box of the present invention does not require manual operation throughout the process, has a high degree of standardization in the maintenance process, gets rid of the previous dependence on manual experience and skills, and solidifies the grinding process in the form of a special device and a standard process.

[0065] Although the content of the present invention has been described in detail through the above preferred embodiments, it should be understood that the above description should not be construed as a limitation of the present invention. After those skilled in the art have read the above content, various modifications and substitutions to the present invention will be obvious. Therefore, the protection scope of the present invention should be defined by the appended claims.

Claims

1. A fully automatic grinding device for the bearing hole of an axle box. The axle box is provided with a bearing end, an axle box node end, and an axle box convex end. The axle box convex end is arranged on one side of the bearing end. It is characterized in that, Including: A grinding robot and a slide table connected to the grinding robot; The slide table is used to load the axle box and includes: A grinding slide table base, a guide rail, a rodless cylinder, a grinding slide table assembly, a slide table guide rail bottom plate, a grinding positioning cam, and a pressure plate cam bracket; The slide table guide rail bottom plate is arranged on the grinding slide table base; The guide rail, the rodless cylinder, and the pressure plate cam bracket are arranged on the slide table guide rail bottom plate; The grinding slide table assembly is movably arranged on the guide rail and is used to fix the axle box. The rodless cylinder can push the grinding slide table assembly to the grinding position; The grinding positioning cam is arranged on the pressure plate cam bracket; The slide table further includes: A grinding protective cover, a slide table stopper, and a grinding dust suction box; The grinding protective cover is arranged at one end of the grinding slide table base; The slide table stopper is arranged on the slide table guide rail bottom plate to block the grinding slide table assembly; The grinding dust suction box is arranged on the grinding slide table base and is close to the grinding protective cover; The grinding slide table assembly includes: A slide table moving bottom plate, which is connected to the rodless cylinder. The slide table moving bottom plate is respectively provided with an axle box node end positioning point corresponding to the axle box node end and a bearing end positioning hole corresponding to the bearing end; At least one clamping assembly, the clamping assembly is symmetrically arranged on both sides of the bearing end positioning hole. The clamping assembly includes a pair of pressure plates, and the pressure plates are respectively installed on the slide table moving bottom plate through first precision reamed bolts. The pressure plates can rotate around the first precision reamed bolts; A spring, which is connected between the two pressure plates; A second bearing arranged at one end of the pressure plate. The second bearing contacts the grinding positioning cam, and the second bearing rotates along the surface of the grinding positioning cam, so that after the pressure plate rotates a certain angle, the other end of the pressure plate presses against the axle box convex end.

2. The fully automatic grinding device for the bearing hole of the axle box according to claim 1, wherein, The grinding robot includes: A robot installation base; A robot manipulator arranged on the robot installation base; A grinding head arranged at the end of the robot manipulator.

3. The fully automatic grinding device for the bearing hole of the axle box according to claim 2, characterized in that, The grinding head includes: A grinding head flange connection seat, which is connected to the robot manipulator; A motor fixing seat, which is connected to the grinding head flange connection seat; A servo motor, which is arranged on the motor fixing seat; A coupling, a rotating shaft, and a brush fixing shaft connected in sequence. The coupling is connected to the servo motor, and the brush fixing shaft is connected to the brush.

4. The fully automatic grinding device for the bearing hole of the axle box according to claim 3, characterized in that, The grinding head further includes: A pair of first bearings, which are sleeved on the rotating shaft and are used to support the rotation of the rotating shaft; A grinding sleeve, which is connected to the motor fixing seat and is sleeved outside the coupling and the rotating shaft.

5. The fully automatic grinding device for the bearing hole of the axle box according to claim 1, characterized in that, The grinding slide table assembly further includes: A guide wheel, which is arranged at the other end of the pressure plate and is used to press against the axle box convex end; A plurality of slide table pads, which are distributed around the slide table moving bottom plate.

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