JPH10570A - Bearing replacing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bearing replacing device excellent in workability. SOLUTION: A hydraulic ram 15 is supported on a second support body 16 positioned on an extraction side of a bearing 8a on the side of a sprocket in such a way to apply hydraulic force on an end surface on an extraction side of an output shaft 8, a horseshoe shaped member 24 of a first support body 14 is inserted in a reverse extraction side of the bearing 8a on the side of the sprocket of the output shaft 8, thereafter, a set member 26 is assembled to the horseshoe shaped member 24, an extraction fixture 11 is constituted of a plural number of through bolts 17-17b connecting the first support body 14 and the second support body 16 with a specified interval, and a tubular work base 12 mounting this extraction fixture 11 and storing a bearing on the side of a brake drum of the output shaft 8 has a plural number of openings 19a on its tubular body 19.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bearing replacement device suitable for taking out a bearing from a shaft used for an escalator speed reducer or the like.

[0002]

2. Description of the Related Art Conventionally, when replacing a bearing fixed to a shaft body such as an output shaft or an input shaft, the shaft body removed from a device such as a reduction gear is vertically oriented in a wooden frame. It has been studied to provide a supporter with a hydraulic ram on a wooden frame and to apply a pressing force to the bearing by the hydraulic ram to remove the bearing from the shaft.

[0003]

However, the above-described bearing replacement device creates a hiring made of a wooden frame for vertically supporting the shaft, but the two shafts provided at both ends of the single shaft are used. When removing and replacing each of the two bearings, it was necessary to dismantle and reassemble each time, which required a plurality of workers, which was a very poor workability.

[0004] It is an object of the present invention to provide a bearing replacement device excellent in workability.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention has a plurality of openings in a bearing replacement device for applying a force from a hydraulic ram to a bearing press-fixed to a shaft and removing the bearing. A first support member provided with a cylindrical worktable, supporting the shaft body such that the bearing is located at an upper portion of the cylindrical worktable, and disposed on a side of the shaft body opposite to the pull-out side of the bearing; A second support, which is located on the pull-out side of the bearing and supports the hydraulic ram so as to apply hydraulic pressure to the end face of the shaft on the pull-out side, between the first support and the second support; And a plurality of rod-shaped members connecting at predetermined intervals to form a recruitment, and the recruitment is mounted on the cylindrical work table.

[0006] The bearing replacement device according to the present invention, in a state where the shaft is supported on the cylindrical work table so that the bearing is located at the upper part, the pulling force which applies a pulling force to the bearing by the hydraulic ram is cylindrical. In order to perform the work of removing the bearings arranged on the worktable, if you have bearings to replace at both ends of the shaft, or if there are multiple shafts, simply relocate the shafts to the cylindrical worktable, Since hiring is almost never required to be dismantled, workability can be greatly improved. In addition, since a plurality of openings are formed in the cylindrical work table, the openings can be made lightweight, and the installation state of the shaft body can be checked through this opening by naked eyes.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 3 is an exploded perspective view of an escalator speed reducer to which the bearing replacement device according to the embodiment of the present invention is applied. The reduction gear 1 in the escalator drive includes a main body case 2, a main body case cover 3 covering the upper surface of the main body case 2, a sprocket side cover 4 attached to one side surface portion 2 of the main body case 2, A brake drum side cover 5 attached to the other side surface portion 2b, an input shaft 6 having a bearing,
It has an intermediate shaft 7 and an output shaft 8. Body case 2
After the output shaft 8, the intermediate shaft 7, and the input shaft 6 are respectively assembled at predetermined positions, the main body case cover 3 arranged so as to cover these shafts is connected by bolts 9. The output shaft 8 includes a sprocket-side bearing 8a.
, A shrink fit collar 8b, an output gear 8c, and a brake drum side bearing 8d, and the intermediate shaft 7 has a sprocket side bearing 7a, an intermediate large gear 7b, an intermediate small gear 7c, and a brake drum side. And a bearing 7a. The input shaft 6 has a shrink fit collar 6a, a sprocket bearing 6b, an input gear 6c, a brake drum side bearing 6d, and a shrink fit collar 6e.

FIG. 1 is a perspective view showing a bearing replacement device according to an embodiment of the present invention. In order to remove the bearings 8a and 8d of the output shaft 8 shown in FIG. It shows a usage pattern.
The output shaft bearing exchanging device 10 has a workbench 11 mounted on a work table 12, the output shaft 8 is fixed below the workbench 11, and a hydraulic ram 15 is fixed above the output shaft 8. 15 is connected to a hydraulic pump 13.

The details of the hiring 11 will be described with reference to FIG. 1 and FIG. 4 which is an exploded perspective view thereof. The recruitment 11 has a first support member 14 made of a steel plate on which the sprocket-side bearing 8a is mounted, and is located above the first support member 14, and
And a second support 16 made of a steel plate that supports the hydraulic ram 15. A screw portion is formed on the inner peripheral portion of the second support 16, and the screw portion formed on the outer peripheral portion of the hydraulic ram 15 is screwed and connected. The second support 1 disposed opposite to the second support 1
6 and the first support 14 are integrated into a plurality of rods, here, four through bolts 17, 17a, 17b, 17c.
The lower end is screwed into a plurality of screw holes 24a to 24d formed in the circumferential direction of the first support 14 and fixed with a nut 29, and the upper end is formed in a plurality of through holes formed in the circumferential direction of the second support 16. It is inserted into the hole, and nuts 27 and 28 are tightened and fixed from above and below.

The first support 14 has a horseshoe-shaped member 24 made of a steel plate having a fitting hole 25 at the center, and a notch opening 24e.
A steel plate assembly member 2 inserted into the side and forming an annular shape as a whole
6. The notch opening 24e of the horseshoe-shaped member 24 is inserted from between the sprocket-side bearing 8a and the output gear 8c to be positioned in the fitting hole 25 on the output shaft 8, and fitting notches 26a and 26b formed at both ends of the assembly member 26 are formed. The lower ends of the through bolts 17 and 17c are screwed into the screw holes 24a and 24d with the lower ends of the through bolts 17 and 17c being inserted so as to match the screw holes 24a and 24d of the horseshoe-shaped member 24. The assembled member 26 is combined with the horseshoe-shaped member 24 by tightening the set nut 29. As shown in FIG. 12, the horseshoe-shaped member 24 has a distance L1 from the through bolt 17 screwed into the mounting hole 24a to the through bolt 17a screwed into the mounting hole 24b, and from the through bolt 17a screwed into the mounting hole 26b. When the distance L2 from the through bolt 17b screwed into the mounting hole 24c to the through bolt 17c screwed into the mounting hole 24d, and the distance L3 from the through bolt 17c into the mounting hole 24d. The distances L1 to L3 are also set smaller than the outer diameter of the sprocket-side bearing 8a or the brake drum-side bearing 8d, and the output shaft 8 is connected to the cutout opening 2e provided in the horseshoe-shaped member 24, that is, the mounting holes 24a and 24d. It can be inserted only from between as shown by arrow P1.

FIGS. 13 and 14 show the assembled member 26.
A notch 26 formed in a substantially U shape at both ends as shown in FIG.
a and 26b, a fitting protrusion 26c fitted into the notch opening 24e of the horseshoe-shaped member 24, and as shown in FIG. 11, when these are fitted and combined, they come into contact with the outer peripheral portion of the sprocket-side bearing 8a. A contact step 26c is formed, and when the assembled member 26 and the horseshoe-shaped member 24 are combined, the lower surface thereof and the sprocket-side bearing 8a are formed.
The mounting surface is formed to be flush as shown in the front view of FIG. To remove only the assembly member 26 from the first support 14, the nut 29 is loosened, and then the assembly member 26 is pulled outward away from the first support 14.

As shown in FIG. 2, a part of the cylindrical work table 12 is cut away.
A cylindrical body 19 made of a steel plate whose lower end is welded to the upper central portion,
A ring-shaped pedestal 20 is provided on the upper part of the cylindrical body 19. The cylindrical body 19 has a plurality of front openings 19a formed on its side to reduce the weight and output power as described later. The arrangement of the shaft body such as the shaft 8 can be confirmed through the frontage 19a. As shown in FIG. 4 which is an exploded perspective view of FIG.
Reference numeral 0 denotes a first ring member 21 fitted to the upper end 19c of the cylindrical body 19, and a wooden second ring member 22 fixed on the first ring member 21, and is integrated by four screws 23. Have been. As shown in FIGS. 7 and 8, the first ring member 21 has a ring groove 21 a that fits into the cylindrical body 19 and is fitted with the screw 23. It has screw holes 21b to 21e. Further, the second ring member 22 has a plan view thereof and B-
As shown in FIGS. 9 and 10 which are B sectional views, the first ring member 21 has four mounting holes 22a to 22d at positions matching the screw holes 21b to 21e. The diameter of the opening 22e of the opening 22 and the diameter of the opening 21f of the first ring member 21 are the same. This diameter is
It is larger than the bearings 8a and 8d of the output shaft 8, and
It is selected smaller than the output gear 8c.

As shown in FIG. 2, the hydraulic ram 15 has a hose connecting portion 15a for air-tightly fixing one end of a hydraulic hose 30. The hydraulic ram 15 is connected to the hydraulic hose 30 via the hydraulic hose 30 connected to the hose connecting portion 15a. It is connected to a pump 13. A ram cover 31 is attached to the movable tip of the hydraulic ram 15 as shown in FIG. 4, and a connecting member having a smaller diameter than the output shaft 8 can be attached and detached between the lower surface of the ram cover 31 and the output shaft 8 as necessary. Can be arranged.

Now, when removing the sprocket-side bearing 8a from the output shaft 8, as shown in FIG.
The hydraulic ram 15 is fixed to the second support 16 at the upper part of
The first support 14 at the lower part of the pullout 11 is disposed on the side opposite to the pull-out side of the sprocket-side bearing 8a, and the ram cover 31 having a smaller diameter than the output shaft 8 without using the above-mentioned connecting member.
Through the bolts 17 through 17 so as to directly contact the output shaft 8.
Adjust the length of 17c and fix with nuts 27-29.
The recruitment 11 composed of the first support 14, the second support 16 and the through bolts 17 to 17c may be assembled in a predetermined state in advance in accordance with the output shaft 8. The horseshoe-shaped member 24 of the first support 14 is used for the sprocket-side bearing 8.
a so that it is positioned on the side opposite to the pull-out side of FIG.
6 is inserted so as to be combined with the horseshoe-shaped member 24, and the bolts 17, 1 are inserted through the fitting notches 26a, 26b.
7c, and fixed with a nut 29 previously screwed to the through bolts 17, 17c. The pullout 11 incorporating the output shaft 8 in this manner is arranged on the cylindrical worktable 12, the brake drum side bearing 8d is positioned in the cylindrical body 19, and the output gear 8c is mounted on the second ring member 22. Place. Next, the hydraulic ram 15 and the hydraulic pump 13 are connected by the hydraulic hose 30 to complete the preparation.

After that, when the hydraulic pump 13 is operated to drive the ram cover 31 of the hydraulic ram 15 downward, a relative force is applied via the first support 14 to drive the sprocket-side bearing 8a upward. The sprocket-side bearing 8a moves to the ram cover 31 side, which is the drawing side, and is pulled out from the output side 8. When the stroke of the hydraulic ram 15 is small, the ram cover 31 of the hydraulic ram 15
Is temporarily returned, and the nuts 27 and 28 are used to shorten the axial length of the through bolts 17 to 17c between the first support 14 and the second support 16 so that the returned ram cover 31 contacts the output shaft 8 and again. The hydraulic ram 1 is operated by operating the hydraulic pump 13.
It is good to drive the ram cover 31 of No. 5 downward.
By designing the hydraulic ram 15 in accordance with the output shaft 8, these adjustment operations can be omitted. Thereafter, when the hydraulic pump 13 is switched to raise the ram cover 31 of the hydraulic ram 15, the mounting holes 24 described with reference to FIG.
The sprocket-side bearing 8a can be taken out from between the through bolts 17, 17c screwed into the a, 24d.

To remove the brake drum side bearing 8d fitted on the opposite side of the output shaft 8 from the output shaft 8,
After moving the hiring 11 from the cylindrical worktable 12 to the floor,
Loosen the nut 29 and remove only the assembly member 26 from the hiring 11, and the through bolts 17, 17c of the removed portion
Remove the output shaft 8 from between. Thereafter, the output shaft 8 is reversed as shown in FIG.
Is positioned upward, and the output shaft 8 on the anti-pull-out side of the brake drum-side bearing 8d is fitted into the cutout opening 24e of the horseshoe-shaped member 24 of the hiring 11, and then the fitting protrusion 26c of the assembly member 26 The notch opening 2 of the horseshoe-shaped member 24
4e, the fitting notches 26a, 26b are engaged with the through bolts 17, 17c.
It is fixed with a nut 29 screwed to 7, 17c. When the recruiter 11 in this state is placed on the cylindrical worktable 12 again as shown in FIG. 5, the output gear 8c is placed on the second ring member 22 of the cylindrical worktable 12. In this state, the hydraulic pump 13 is operated, and the brake drum side bearing 8d is operated.
Is carried out in the same manner as described above. Therefore, the other end surface of the output shaft 8 is pressed by the hydraulic ram 15, and the bearing 8 d on the brake drum side is withdrawn from the shaft body of the output shaft 8 via the first support 14.

At this time, the brake drum side bearing 8
Since the distance traveled in the axial direction of the output shaft 8 for extracting d is different from the distance traveled in the axial direction of the output shaft 8 for extracting the sprocket-side bearing 8a, the output shaft 8 is turned over. When the hydraulic ram 15 is supported by the drawer 11, there is a space between the ram cover 31 of the hydraulic ram 15 and the end face of the output shaft 8. Pass this through bolts 17-1
Although it can be adjusted by 7c, here, a plurality of small diameter connecting members 32 are arranged between the ram cover 31 and the output shaft 8 as shown in FIG. Therefore,
Work can be performed quickly without loosening the nuts 27 and 28 to move or disassemble the second support 16.

Here, the ring-shaped pedestal 20 composed of the first ring body 21 and the second ring body 22 is simply a cylindrical body 1
Since the ring-shaped pedestal 20 and the cylindrical worktable 12 can be separated and stored after use because they are merely placed on the upper end 19c of the ninth, it is convenient. Moreover, the ring-shaped pedestal 2
0 is a ring groove 21 fitted to the upper end 19c of the cylindrical body 19.
Since it is attached by the first ring member 21 provided with a, even if the pullout 11 vibrates, it does not slip down from the cylindrical body 19 of the cylindrical worktable 12. Ring-shaped pedestal 2
When 0 is constituted by a wooden second ring member 21, the second ring member 21 can absorb the impact sound caused by the jumping of the hiring 11.

FIGS. 16 to 18 show a bearing replacement device according to another embodiment of the present invention, showing a use form as a bearing replacement device for an intermediate shaft when replacing the sprocket side bearing 7a of the intermediate shaft 7. FIG. ing. Basically, the output shaft bearing exchange device 10 can be used, but here, a dedicated intermediate shaft bearing exchange device with a similar configuration is used. At this time, the intermediate shaft bearing exchange device has a smaller diameter than the output shaft 8 as shown in FIG. The first support 14, the assembly member 26, the ram cover 31, the cylindrical body 19, and the like can be prepared according to the diameter. Here, even if the diameter is different, the same reference numerals are given to the same components. As shown in the exploded view of FIG. 18, the hydraulic ram 15 And the first support 14 below the pullout 11 is disposed between the sprocket-side bearing 7a and the intermediate large gear 7b, and an appropriate number of the above-described connecting members 32 smaller in diameter than the intermediate shaft 7 are provided on the ram cover 3.
After being interposed between the output shaft 1 and the output shaft 8 and assembled as shown in FIG. 16, the extraction work is performed in the same manner as described above.

When the bearing 7d on the brake drum side of the intermediate shaft 7 is to be replaced, the recruiter 11 is removed from the cylindrical worktable 12 in the same manner as the operation for removing the bearing 8d on the brake drum side of the output shaft 8, and the assembly member 26 After removing only the intermediate shaft 7 from the hiring 11, the intermediate shaft 7 is re-installed so that the brake drum side bearing 7d of the intermediate shaft 7 is located at an upper position, and then the hiring 11 is again performed as shown in FIG.
May be attached to the cylindrical work table 12 and the hydraulic pump 13 may be operated. If it is desired to check whether the output shaft 8 or the intermediate shaft 7 is subjected to the work of extracting the bearing in a state where the pullout 11 is installed on the cylindrical worktable 12, the cylindrical worktable 12 is used. Can be confirmed by looking through the opening 19a.

FIGS. 20 to 22 show a bearing replacement device according to another embodiment of the present invention, showing a use form as an input shaft bearing replacement device for replacing a sprocket-side bearing 6b of an input shaft 6. FIG. I have. Although it is possible to configure the bearing exchange device for the input shaft exclusively, here, the use of the intermediate shaft bearing exchange device 11
And the cylindrical worktable 12. However, since the input shaft 6 cannot be placed on the cylindrical worktable 12 because its outer diameter is small as a whole, the input shaft 6 is placed inside the cylindrical body 19 as shown in FIG.
Further, as shown in FIG. 22, a supporting additional member is arranged. These additional members include a columnar insertion table 39 that receives the lower end of the input shaft 6, an insertion cylinder 40 that receives the brake drum-side bearing 6d, and a split ring body 41. When checking whether or not these additional members have been installed, the opening 19 formed in the cylindrical body 19 of the cylindrical worktable 12 is also used.
It can be easily confirmed by looking through a. Insertion table 39
After inserting the insertion cylinder 40 into the cylinder 19, the cylinder 1
The first ring body 21 and the second ring body 38 fitted on the upper end of the input gear 9 are fixed by screws 23, and the lower part of the input gear 6 c is sandwiched by the split ring body 41, and the shaft of the input shaft 6 is The core is supported, and the flange of the split ring body 41 is inserted so as to rest on the second ring body 22. In this way,
Even if the cylindrical portion 19 having a large diameter is used, the input shaft 6 can be supported in the up-down direction and the axis can be supported.

As shown in the perspective view of FIG. 20, a small diameter connecting member 32 is disposed between the ram cover 31 and the input shaft 6 and assembled. Then, the hydraulic ram 15 is operated to operate the sprocket side in the same manner as described above. Pull out the bearing 6b. When removing the sprocket-side bearing 6b from the input shaft 6, as shown in FIGS.
When the hydraulic pump 13 is actuated by placing the recruiter 11 on which the is mounted on the cylindrical worktable 12, one end surface of the input shaft 6 is pressed by the hydraulic ram 15 and the sprocket-side bearing 6 b is withdrawn from the input shaft 6. .

When the bearing 6d on the brake drum side of the input shaft 6 is to be replaced, the two insertion tables 42 and 43 for receiving the lower end of the input shaft 6 in the cylindrical body 19 as shown in FIGS. Then, the insertion tube base 44 for receiving the input gear 6c is inserted. Then, the first ring 2 is attached to the upper end of the cylindrical body 19.
1 and the second ring body 22 is fixed with screws 23,
A split ring body 41 having a flange is inserted into the first ring body 21 and the second ring body 22, and the brake ring bearing 6d is
To support the vertical direction and the axis of the input shaft 6. The hydraulic ram 15 is assembled as shown in FIG.
Is operated, the end face of the input shaft 6 is pressed by the ram cover 31 of the hydraulic ram 15, and the brake drum-side bearing 6 d is pulled up via the first support 14 and pulled out from the input shaft 6.

As described above, the cylindrical work table 12 used for extracting the sprocket-side bearing 7a and the brake drum-side bearing 7b of the intermediate shaft 7 has the inserts 39, 42, 43, 44 and the split ring body therein. Since the additional supporting member such as 41 is inserted, it can be used for extracting the sprocket-side bearing 6b and the brake drum-side bearing 6d of the input shaft 6. Further, the arrangement of these additional supporting members can be easily and silently confirmed from the opening 19a.

[0025]

As described above, according to the bearing exchanging device of the present invention, the cylindrical workbench is arranged so that the bearing is located at the upper part without forming a wooden frame for supporting the shaft body in a vertical state. In the state where the shaft is supported, the pulling force that applies a pulling force to the bearing by the hydraulic ram is arranged on the cylindrical work table and the bearing to be removed Even in the case of having or having a plurality of shafts, it is not necessary to dismantle the hiring simply by disposing the shafts on the cylindrical workbench, so that the workability can be greatly improved. Moreover, since a plurality of openings are formed in the cylindrical worktable, the openings can be made lightweight, and the installation state of the shaft can be easily checked through the openings.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view showing a bearing replacement device according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a partially broken cylindrical workbench of the bearing replacement device shown in FIG. 1;

FIG. 3 is an exploded perspective view of an escalator speed reducer employing the bearing replacement device according to the present invention.

FIG. 4 is an exploded perspective view of a main part of the bearing replacement device shown in FIG. 1;

FIG. 5 is a perspective view showing another use form of the bearing replacement device shown in FIG. 1;

FIG. 6 is an exploded perspective view of a main part of the bearing replacement device shown in FIG. 5;

FIG. 7 is a plan view of a first ring member of the bearing replacement device shown in FIG. 4;

FIG. 8 is a cross-sectional view of the first ring member shown in FIG. 7, taken along line AA.

FIG. 9 is a plan view of a second ring member of the bearing replacement device shown in FIG. 4;

FIG. 10 is a cross-sectional view of the second ring member shown in FIG. 8, taken along line BB.

FIG. 11 is a plan view of a first support of the bearing replacement device shown in FIG. 4;

FIG. 12 is a plan view of a horseshoe-shaped member which is a main part of the first support shown in FIG.

FIG. 13 is a plan view of an assembled member which is a main part of the first support shown in FIG.

FIG. 14 is a side view of the assembly member shown in FIG.

FIG. 15 is an enlarged front view showing a main part of the bearing replacement device shown in FIG. 1;

FIG. 16 is a partially cutaway perspective view showing a bearing replacement device according to another embodiment of the present invention.

FIG. 17 is a perspective view showing a cylindrical workbench of the bearing replacement device shown in FIG. 16;

18 is an exploded perspective view of the bearing replacement device shown in FIG.

FIG. 19 is an exploded perspective view showing another use form of the bearing replacement device shown in FIG.

FIG. 20 is a partially cutaway perspective view showing a bearing replacement device according to another embodiment of the present invention.

21 is a perspective view showing a cylindrical working table of the bearing replacement device shown in FIG. 20 with a part cut away.

FIG. 22 is an exploded perspective view of the bearing replacement device shown in FIG.

FIG. 23 is a perspective view partially broken away showing another usage form of the bearing replacement device shown in FIG. 20;

24 is a partially cutaway perspective view showing a cylindrical workbench of the bearing replacement device shown in FIG. 23;

25 is an exploded perspective view of the bearing replacement device shown in FIG.

[Description of Signs] 6 Input shaft 7 Intermediate shaft 8 Output shaft 10 Bearing exchange device for output shaft 11 Elimination 12 Cylindrical work table 13 Hydraulic pump 14 First support 15 Hydraulic ram 16 Second support 17, 17a, 17b , 17c Through bolt 19 Cylindrical body 21 First ring member 22 Second ring member 24 Horseshoe-shaped member 26 Assembling member 32 Connecting member 40 Inserting cylinder 41 Split ring 42, 43 Insertion stand 44 Inserting cylinder

Claims (1)

[Claims] 1. A bearing exchange device for applying a force from a hydraulic ram to a bearing press-fitted into a shaft body and removing the bearing, wherein a cylindrical worktable having a plurality of openings is provided. A first support that supports the shaft so as to be located at an upper portion, and is disposed on a side opposite to the pull-out side of the bearing of the shaft, and a first support that is located on the pull-out side of the bearing and the pull-out side of the shaft. Hiring from a second support that supports the hydraulic ram so as to apply hydraulic pressure to the end face, and a plurality of rods that connect the first support and the second support at predetermined intervals. A bearing replacement device, wherein the recruiter is configured and placed on the cylindrical work table.