JPS63216683A - Bearing drawing device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a bearing extraction device for extracting a bearing member fitted inside a roller or the like.

[Prior Art] A bearing puller is conventionally known as a jig for pulling out a bearing or the like fitted inside a roller or housing. This puller hooks the tips of a plurality of pull-out legs pivoted on pull-out screws onto the inner end surface of the bearing, brings the bridging member into which the pull-out screws are screwed into contact with the outer end surface of the bearing periphery of the bearing housing, etc. By unscrewing the pull-out screw, the bearing is pulled out together with the plurality of pull-out legs.

However, these pullers can only be used when the outer end surface of the bearing periphery of the housing etc. has sufficient space to support the bridging member, and the pull-out leg may be pulled inward when unscrewing the pull-out screw. Because of this, the tips of the handling legs tend to come off.

For this reason, the outer end surface of a local part of a bearing such as a roller is narrow (if a conventional puller cannot be used, the bearing has been extracted by the method shown in FIG. 3). That is, align the bearing a with the hole formed in the support plate C, stand the roller b upright on the support plate C, insert the stopper d through the outer end opening of the roller b, and insert the tip into the inner end surface of the bearing a. The bearing is pushed and handled by placing it in contact with the metal fitting and hitting it with a hammer or the like from above.

This conventional method can be easily carried out when the bearings are loosely fitted.

[Problems to be Solved by the Invention] However, the bearing is tightly fitted into the roller, and it is necessary to change the contact position of the stopper and hit it with a hammer many times.

As a result, the tip of the stopper comes off the inner end of the bearing.
There is a risk of blank firing, and there is also a risk of damaging the inner circumferential surface of the roller.

The present invention has been made in view of the above, and an object of the present invention is to provide a bearing extraction device that can safely and reliably extract a bearing, and that can reduce labor.

[Means for Solving the Problems] A bearing extraction device according to the present invention includes a plurality of leg members each having an engaging end portion at a lower end that presses an inner end surface of a bearing member, and a plurality of leg members arranged around a circumferential portion of the bearing member. a pivoting body member; a spring member disposed between the body member and each leg member to press the engaging end of the leg member outward; The bearing member is characterized in that the bearing member can be extracted by pressure.

[Operation] This bearing extraction device is inserted through an opening of a roller, etc. with the engaging end of each leg member drawn inward to the main body side, and then each leg member is expanded by spring force. Each engaging end is brought into contact with the inner end surface of the bearing. Then, by applying a pressing force such as hydraulic pressure from the upper part of the main body member, the bearing member is pushed out.

[Embodiment] FIG. 1 is an overall view of a bearing extraction device according to an embodiment of the present invention, and FIG. 2 shows a method for extracting a bearing from a roller using this bearing extraction device.

The bearing extraction device of this embodiment is particularly suitable for use in general guide rollers for continuous mills in billet factories. This bearing extraction device includes a main body member 1 formed in a stepped shape in the vertical direction, and a plurality of leg members 4 pivotally supported on the main body portion 1.

The main body member 1 includes a large-diameter portion 2 that receives a pressing force from the outside, and a small-diameter portion 3 that pivotally supports leg members 4 below the large-diameter portion 2. It is rotatably attached to the member 9 via the pin 7.

The leg members 4 are pressed by a spring 8 provided between them and the small diameter portion 3, and each lower end portion is expanded radially. This lower end portion is formed into an engaging end portion having an engaging surface 5 that presses the bearing end surface. A protrusion 6 extends downward from the inside of the engagement surface 5' (7) of the main body member, and this protrusion 6 engages with the inner peripheral surface of the bearing to prevent the leg member 4 from coming off from a predetermined position. do.

This bearing handling device can be formed to any size as required, but in this example, the total height is 210 m,
The length of the leg member 4 was 1508, and the leg open length and leg closed length were 112 s and 67 mIn, respectively.

When extracting a bearing from a roller using the above-mentioned bearing extraction device, it is performed as follows.

First, the roller 10 is placed on the substrate 12 in which the opening 13 through which the bearing 11 is inserted is formed, with the bearing 11 on the extraction side facing down. Then, the bearing extraction device is inserted through the upper opening of the roller 10. The leg member 4 is pulled inward to close it, and in a predetermined position, the protrusion 6 of the leg member 4 is inserted into the bearing 1.
1 and the engaging surface 5 is engaged with the inner peripheral surface of the bearing 11.
Place it on the end surface. The spring 8 pushes the leg member 4 outward and guides the tip along the clearance within the roller 10;
The engagement surface 5 can be securely attached to the bearing 11.

After that, the substrate 1 is
A pressing force is applied to the large diameter portion 2 of the main body member 1 by an arbitrary pressing means such as a hydraulic cylinder 16 appropriately attached to the main body member 1 . The pressing force acting on the large diameter portion 2 is equally transmitted to the four leg members 4, and the bearing 11 is pushed out.

In the above embodiment, the number of leg members is four, but the number may be three or any other appropriate number as required.

[Effects of the Invention] As described above, according to the present invention, a bearing member fitted to a roller, etc. can be safely and quickly extracted without damaging the inner surface of the roller, etc. and the bearing member, and The labor and cost required for extraction can be greatly reduced.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of the entire bearing extraction device according to an embodiment of the present invention, FIG. 2 is an explanatory diagram of the state in which the bearing extraction device of FIG. 1 is used to extract a bearing from a roller, and FIG. It is an explanatory diagram. 1... Main body member, 2... Large diameter part, 3... Small diameter part,
4... Leg member, 5... Engagement surface, 7... Bin, 8... Spring. Applicant's agent Patent attorney Takehiko Suzue Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] A plurality of leg members each having an engaging end portion at the lower end that presses the inner end surface of the bearing member, a main body member that pivotally supports the plurality of leg members around the periphery, and a structure between the main body member and each leg member. A bearing extraction device comprising: a spring member provided to press the engaging end portion of the leg member outward; and the bearing member can be extracted by a pressing force applied via the main body member. .