CN109732272B - Full ceramic bearing electricity main shaft bearing and pivot dismounting device - Google Patents

Abstract

A full ceramic bearing electric main shaft bearing and rotating shaft dismounting device comprises a workbench, an electric main shaft clamping and positioning mechanism and a bearing dismounting mechanism, wherein the electric main shaft clamping and positioning mechanism and the bearing dismounting mechanism are arranged on the workbench in parallel; the electric main shaft clamping and positioning mechanism is used for fixing the electric main shaft, and the bearing disassembling mechanism is used for disassembling the bearing from the rotating shaft; the bearing disassembly mechanism is provided with the multi-jaw chuck for bearing disassembly, the multi-jaw chuck for bearing disassembly can adjust the position in two degrees of freedom in the horizontal direction, the multi-jaw chuck for bearing disassembly can rotate the upper jaw thereof, the radial position and the axial position are finely adjusted, liquid nitrogen can act on the rotating shaft and the bearing through the multi-jaw chuck for bearing disassembly, a gap is generated between a cooled bearing inner ring and the rotating shaft, the bearing can be disassembled from the rotating shaft through the bearing disassembly mechanism, and the disassembled bearing can be remained on the jaw. The invention improves the automatic disassembly level, the disassembly precision and the working efficiency and realizes the nondestructive disassembly.

Description

An all-ceramic bearing electric spindle bearing and rotating shaft disassembly device

technical field

The invention belongs to the technical field of disassembly and assembly of an electric spindle, and in particular relates to a disassembly device for a full-ceramic bearing electric spindle bearing and a rotating shaft.

Background technique

The electric spindle is the core component of the CNC machine tool, and the bearing is the core component of the electric spindle. In order to further improve the operation accuracy of the electric spindle, more and more electric spindles have begun to use ceramic bearings. Compared with traditional steel bearings, ceramic bearings have more advantages. Good thermal stability, wear resistance, high strength and other good properties are also the key to improving the running accuracy of the electric spindle.

At present, the disassembly of the electric spindle using traditional steel bearings mainly relies on manual methods to complete the disassembly, resulting in high labor intensity and low work efficiency. The accuracy of the spindle and bearing surfaces has been damaged, which will inevitably affect the running accuracy of the electric spindle.

If the electro-spindle adopts ceramic bearings, compared with the electro-spindle using traditional steel bearings, the disassembly method will be significantly changed. If it is still manually disassembled, it will become more and more difficult to meet the actual needs.

SUMMARY OF THE INVENTION

In view of the problems existing in the prior art, the present invention provides an all-ceramic bearing electric spindle bearing and rotating shaft disassembly device, which greatly improves the level of automatic disassembly, not only effectively reduces the labor intensity of workers, but also effectively improves the disassembly accuracy, and at the same time can Realize damage-free disassembly, and effectively improve work efficiency.

In order to achieve the above purpose, the present invention adopts the following technical solutions: an all-ceramic bearing electric spindle bearing and rotating shaft disassembly device, including a worktable, an electric spindle clamping and positioning mechanism, and a bearing disassembly mechanism; the electric spindle clamping and positioning mechanism and the bearing The dismantling mechanism is installed on the worktable in parallel; the electric spindle clamping and positioning mechanism includes a positioning mechanism base, a positioning mechanism guide rail, a first screw nut slider, a first screw, a first clamping drive motor, and a second screw nut slider. block, the second lead screw, the second clamping drive motor, the electric spindle support positioning seat and the height adjustment hydraulic cylinder; the positioning mechanism base is fixed on the worktable, and the positioning mechanism guide rail is horizontally arranged on the positioning mechanism base, The first nut slider and the second nut slider are symmetrically mounted on the guide rail of the positioning mechanism; the first clamping drive motor is fixed on the base of the positioning mechanism through the first motor mounting frame, and the first clamping drive motor The motor shaft of the motor shaft is fixedly connected with the end of the first lead screw, and the first lead nut slider is sleeved on the first lead screw, and a first chuck is installed on the first lead nut slider; the first lead screw Parallel to the guide rail of the positioning mechanism; the second clamping drive motor is fixed on the base of the positioning mechanism through the second motor mounting frame, the motor shaft of the second clamping drive motor is fixedly connected with the end of the second lead screw, and the first Two screw nut sliders are sleeved on the second screw, and a second chuck is installed on the second screw slider; the second screw is parallel to the guide rail of the positioning mechanism; A hydraulic cylinder installation groove is arranged in the base of the positioning mechanism in the middle of the two chucks, the height adjustment hydraulic cylinder is vertically fixed in the hydraulic cylinder installation groove, and the piston rod of the height adjustment hydraulic cylinder is set upward, and the electric spindle supports The positioning seat is fixed on the top of the piston rod of the height adjustment hydraulic cylinder.

The bearing dismounting mechanism includes a dismounting mechanism base, a first dismounting mechanism guide rail, a first screw nut slide table, a first ball screw, a first driving handwheel, a second dismounting mechanism guide rail, a second screw nut slide table, a second A ball screw, a second driving handwheel, a multi-jaw chuck for bearing disassembly, and a chuck fixing frame; the dismounting mechanism base is fixedly mounted on the worktable, and the first dismounting mechanism guide rail is horizontally arranged on the dismounting mechanism base, The first screw nut slide table is installed on the guide rail of the first disassembly mechanism, and the first screw nut slide table is sleeved on the first ball screw, and the first ball screw is parallel to the guide rail of the first disassembly mechanism; A driving handwheel is fixed on the end of the first ball screw; the guide rail of the second disassembly mechanism is horizontally fixed on the first screw nut slide table, and the guide rail of the second disassembly mechanism is perpendicular to the guide rail of the first disassembly mechanism; The second screw nut slide table is installed on the guide rail of the second disassembly mechanism, and the second screw nut slide table is sleeved on the second ball screw, and the second ball screw is parallel to the guide rail of the second disassembly mechanism; The driving handwheel is fixedly installed on the end of the second ball screw; the chuck fixing frame is fixedly installed on the second screw nut slide table, the multi-jaw chuck used for bearing disassembly is installed on the chuck fixing frame, and The central axis of the multi-jaw chuck for bearing dismounting is parallel to the guide rail of the second dismounting mechanism.

The multi-jaw chuck for bearing dismantling includes a chuck base, an electric turntable, a chuck end and a hook; the chuck base is fixedly mounted on the chuck fixing frame, and the chuck end passes through the electric turntable. It is connected to the chuck base; the chuck end has a circular structure, and a number of cooling holes are opened on the inner surface of the chuck end. The nitrogen tank and the liquid nitrogen tank are placed on the workbench; the number of the hooks is three or four, the hooks are located on the axial outer end face of the end of the chuck, and the hooks can be automatically adjusted in diameter on the end of the chuck Axial position and Axial position.

Beneficial effects of the present invention:

The all-ceramic bearing electric spindle bearing and rotating shaft disassembly device of the present invention greatly improves the level of automatic disassembly, not only effectively reduces the labor intensity of workers, but also effectively improves the disassembly accuracy, and at the same time, it can realize non-destructive disassembly and effectively improve the work. efficiency.

Description of drawings

1 is a schematic structural diagram of an all-ceramic bearing electric spindle bearing and a rotating shaft disassembly device according to the present invention;

Fig. 2 is the structural schematic diagram of the electric spindle clamping and positioning mechanism of the present invention;

3 is a schematic structural diagram of the bearing disassembly mechanism of the present invention;

4 is a schematic structural diagram of a multi-jaw chuck for bearing disassembly according to the present invention;

In the figure, 1—worktable, 2—electric spindle clamping and positioning mechanism, 3—bearing disassembly mechanism, 4—positioning mechanism base, 5—positioning mechanism guide rail, 6—first screw nut slider, 7—first lead screw , 8—the first clamping drive motor, 9—the second screw nut slider, 10—the second screw, 11—the second clamping drive motor, 12—the electric spindle support and positioning seat, 13—the height adjustment hydraulic cylinder, 14—the first motor mounting frame, 15—the first collet, 16—the second collet, 17—the base of the dismantling mechanism, 18—the guide rail of the first dismantling mechanism, 19—the first thread nut slide table, 20—the first ball Lead screw, 21—the first driving handwheel, 22—the guide rail for the second disassembly mechanism, 23—the second screw nut slide table, 24—the second ball screw, 25—the second driving handwheel, 26—the bearing for dismantling Claw chuck, 27—chuck fixing frame, 28—chuck base, 29—electric turntable, 30—chuck end, 31—claw, 32—cooling hole, 33—liquid nitrogen tank, 34—second Motor mounting bracket.

Detailed ways

The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

As shown in Figures 1 to 4, an all-ceramic bearing electric spindle bearing and rotating shaft disassembly device includes a worktable 1, an electric spindle clamping and positioning mechanism 2, and a bearing disassembly mechanism 3; the electric spindle clamping and positioning mechanism 2 and the bearing The dismantling mechanism 3 is installed on the worktable 1 in parallel; the electric spindle clamping and positioning mechanism 2 includes a positioning mechanism base 4, a positioning mechanism guide rail 5, a first screw nut slider 6, a first screw 7, a first clamping drive The motor 8, the second screw nut slider 9, the second screw 10, the second clamping drive motor 11, the electric spindle support positioning seat 12 and the height adjustment hydraulic cylinder 13; the positioning mechanism base 4 is fixedly mounted on the workbench 1 The positioning mechanism guide rail 5 is horizontally arranged on the positioning mechanism base 4, and the first nut slider 6 and the second nut slider 9 are symmetrically installed on the positioning mechanism guide rail 5; the first clamping drive The motor 8 is fixed on the positioning mechanism base 4 through the first motor mounting frame 14, the motor shaft of the first clamping drive motor 8 is fixedly connected with the end of the first lead screw 7, and the first screw nut slider 6 is sleeved on the first lead screw 7. On the lead screw 7, a first chuck 15 is installed on the first screw nut slider 6; the first lead screw 7 is parallel to the guide rail 5 of the positioning mechanism; the second clamping drive motor 11 passes through the second The motor mounting frame 34 is fixed on the positioning mechanism base 4 , the motor shaft of the second clamping drive motor 11 is fixedly connected with the end of the second lead screw 10 , and the second lead nut slider 9 is sleeved on the second lead screw 10 , a second chuck 16 is installed on the second screw nut slider 9; the second screw 10 is parallel to the guide rail 5 of the positioning mechanism; the positioning between the first chuck 15 and the second chuck 16 The mechanism base 4 is provided with a hydraulic cylinder installation groove, the height adjustment hydraulic cylinder 13 is vertically fixed in the hydraulic cylinder installation groove, and the piston rod of the height adjustment hydraulic cylinder 13 is set upward, and the electric spindle supports the positioning seat 12 It is fixed on the top of the piston rod of the height adjustment hydraulic cylinder 13.

The bearing dismounting mechanism 3 includes a dismounting mechanism base 17, a first dismounting mechanism guide rail 18, a first nut slide 19, a first ball screw 20, a first driving handwheel 21, a second dismounting mechanism guide rail 22, a second The screw nut slide table 23, the second ball screw 24, the second driving hand wheel 25, the multi-jaw chuck 26 for bearing disassembly, and the chuck fixing frame 27; the disassembly mechanism base 17 is fixed on the worktable 1, so The first dismantling mechanism guide rail 18 is horizontally arranged on the dismantling mechanism base 17, the first screw nut sliding table 19 is installed on the first dismantling mechanism guide rail 18, and the first screw nut sliding table 19 is sleeved on the first ball screw 20, the first ball screw 20 is parallel to the guide rail 18 of the first disassembly mechanism; the first driving handwheel 21 is fixedly mounted on the end of the first ball screw 20; the guide rail 22 of the second disassembly mechanism is fixed horizontally. It is mounted on the first thread nut slide table 19, the second disassembly mechanism guide rail 22 is perpendicular to the first disassembly mechanism guide rail 18; the second thread nut slide table 23 is installed on the second disassembly mechanism guide rail 22, and the second thread The female slide 23 is sleeved on the second ball screw 24 , and the second ball screw 24 is parallel to the guide rail 22 of the second disassembly mechanism; the second driving handwheel 25 is fixedly mounted on the end of the second ball screw 24 ; The chuck fixing frame 27 is fixedly mounted on the second threaded nut slide 23, the multi-jaw chuck 26 for the bearing removal is installed on the chuck fixing frame 27, and the bearing removal uses the multi-jaw chuck 26 in the middle The axis is parallel to the guide rail 22 of the second disassembly mechanism.

The multi-jaw chuck 26 for bearing dismantling includes a chuck base 28, an electric turntable 29, a chuck end 30 and a hook 31; the chuck base 28 is fixedly mounted on the chuck fixing frame 27, and the The chuck end 30 is connected to the chuck base 28 through the electric turntable 29; the chuck end 30 has a circular structure, and a plurality of cooling holes 32 are opened on the inner surface of the chuck end 30, and a plurality of cooling holes 32 Connected to a conduit, the other end of the conduit is connected with a liquid nitrogen tank 33, and the liquid nitrogen tank 33 is placed on the workbench 1; the number of the hooks 31 is three or four, and the hooks 31 are located at the end of the chuck On the axially outer end face of the 30, the hook 31 can automatically adjust the radial position and the axial position on the chuck end 30.

Describe one use process of the present invention below in conjunction with accompanying drawing:

First, place the electro-spindle horizontally on the electro-spindle support and positioning seat 12, then adjust the height to adjust the extension of the piston rod of the hydraulic cylinder 13, and then realize the adjustment of the height of the electro-spindle support and positioning base 12 and its power-on spindle until the electro-spindle The central axis of the bearing is in the same horizontal plane as the central axis of the multi-jaw chuck 26 for bearing disassembly.

Activate the first clamping drive motor 8 and the second clamping drive motor 11 respectively, so that the first nut slider 6 and the second nut slider 9 move toward each other along the guide rail 5 of the positioning mechanism until the first chuck 15 and The second collet 16 is clamped on the electrospindle housing.

First, rotate the first driving handwheel 21 to move the first nut slide 19 along the guide rail 18 of the first disassembly mechanism until the center axis of the multi-jaw chuck 26 for bearing dismantling and the center axis of the multi-jaw chuck 26 for bearing dismantling The axes coincide; then turn the second drive hand wheel 25 to move the second nut slide 23 along the guide rail 22 of the second disassembly mechanism until the shaft of the electric spindle moves into the chuck end of the multi-jaw chuck 26 for bearing disassembly 30 in the inner hole;

First adjust the radial position of the hook 31 so that the hook 31 is aligned with the annular gap between the inner and outer rings of the bearing, and then control the action of the electric turntable 29 to adjust the circumferential position of the hook 31 so that the hook 31 is aligned with the gap between the bearing balls Finally, adjust the axial position of the hook 31 so that the hook 31 extends into the gap between the bearing balls.

Next, open the liquid nitrogen tank 33, introduce the liquid nitrogen into the chuck end 30 through the conduit, and make the liquid nitrogen act on the rotating shaft and the bearing through several cooling holes 32, and use the liquid nitrogen to cool the rear bearing and the rotating shaft as a whole. The difference in shrinkage between the ceramic material (bearing) and the steel material (shaft) causes a gap between the inner ring of the bearing and the shaft.

After the cooling is completed, when the gap between the inner ring of the bearing and the rotating shaft meets the bearing disassembly requirements, fine-tune the radial position of the hook 31 to make the hook 31 support the outer ring of the bearing, and then rotate the second driving handwheel 25 to make The multi-jaw chuck 26 for bearing removal moves in a direction away from the motorized spindle until the bearing is completely disengaged from the rotating shaft, and the removed bearing remains on the hook 31 .

The solutions in the embodiments are not intended to limit the scope of the patent protection of the present invention, and all equivalent implementations or modifications that do not depart from the present invention are included in the scope of the patent of this case.

Claims (1)

1. The utility model provides a full ceramic bearing electricity main shaft bearing and pivot dismounting device which characterized in that: comprises a workbench, an electric main shaft clamping and positioning mechanism and a bearing dismounting mechanism; the electric main shaft clamping and positioning mechanism and the bearing disassembling mechanism are arranged on the workbench in parallel; the electric spindle clamping and positioning mechanism comprises a positioning mechanism base, a positioning mechanism guide rail, a first nut slide block, a first lead screw, a first clamping driving motor, a second nut slide block, a second lead screw, a second clamping driving motor, an electric spindle supporting and positioning seat and a height adjusting hydraulic cylinder; the positioning mechanism base is fixedly arranged on the workbench, the positioning mechanism guide rail is horizontally arranged on the positioning mechanism base, and the first nut sliding block and the second nut sliding block are symmetrically arranged on the positioning mechanism guide rail; the first clamping driving motor is fixed on the positioning mechanism base through a first motor mounting frame, a motor shaft of the first clamping driving motor is fixedly connected with the end part of a first lead screw, a first nut sliding block is sleeved on the first lead screw, and a first chuck is mounted on the first nut sliding block; the first lead screw is parallel to the guide rail of the positioning mechanism; the second clamping driving motor is fixed on the positioning mechanism base through a second motor mounting frame, a motor shaft of the second clamping driving motor is fixedly connected with the end part of a second screw rod, a second nut sliding block is sleeved on the second screw rod, and a second chuck is installed on the second nut sliding block; the second lead screw is parallel to the guide rail of the positioning mechanism; a hydraulic cylinder mounting groove is formed in a positioning mechanism base between the first chuck and the second chuck, the height adjusting hydraulic cylinder is vertically and fixedly mounted in the hydraulic cylinder mounting groove, a piston rod of the height adjusting hydraulic cylinder is arranged upwards, and the electric spindle supporting and positioning seat is fixedly mounted at the top of the piston rod of the height adjusting hydraulic cylinder; the bearing dismounting mechanism comprises a dismounting mechanism base, a first dismounting mechanism guide rail, a first nut sliding table, a first ball screw, a first driving hand wheel, a second dismounting mechanism guide rail, a second nut sliding table, a second ball screw, a second driving hand wheel, a multi-jaw chuck for bearing dismounting and a chuck fixing frame; the disassembling mechanism base is fixedly arranged on the workbench, the first disassembling mechanism guide rail is horizontally arranged on the disassembling mechanism base, the first nut sliding table is arranged on the first disassembling mechanism guide rail and sleeved on a first ball screw, and the first ball screw is parallel to the first disassembling mechanism guide rail; the first driving hand wheel is fixedly arranged at the end part of the first ball screw; the second dismounting mechanism guide rail is horizontally and fixedly arranged on the first nut sliding table and is vertical to the first dismounting mechanism guide rail; the second nut sliding table is arranged on a second dismounting mechanism guide rail and sleeved on a second ball screw, and the second ball screw is parallel to the second dismounting mechanism guide rail; the second driving hand wheel is fixedly arranged at the end part of the second ball screw; the chuck fixing frame is fixedly arranged on the second nut sliding table, the multi-jaw chuck for bearing disassembly is arranged on the chuck fixing frame, and the central axis of the multi-jaw chuck for bearing disassembly is parallel to the guide rail of the second disassembly mechanism; the multi-jaw chuck for bearing disassembly comprises a chuck base, an electric turntable, a chuck end and a claw; the chuck base is fixedly arranged on the chuck fixing frame, and the end of the chuck is connected to the chuck base through an electric turntable; the chuck end is of a circular structure, a plurality of cooling holes are formed in the inner surface of the chuck end, the cooling holes are connected to a guide pipe in a junction mode, the other end of the guide pipe is connected with a liquid nitrogen tank, and the liquid nitrogen tank is placed on the workbench; the number of the hooks is three or four, the hooks are located on the axial outer end face of the chuck end, and the radial position and the axial position of the hooks on the chuck end can be automatically adjusted.

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