JP2006009967A - Nut with pressing function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce costs by eliminating the need for a special tool, and to easily mount and remove a bearing without restricting a work place.
When a bearing 3 is attached to a pivot 1, a lock nut 20 having a pressing function is attached halfway to a screw portion 2a of an adapter sleeve 2. In this state, at least two or more bolts 30 are inserted into at least two through holes 21 formed in the lock nut 20 and gradually tightened. Thereby, the end face of the inner ring 4 of the bearing 3 is pressed at the tip of the bolt 30, and the bearing 3 is pushed forward and can be attached to the pivot 1. After the bearing 3 is mounted, the position of the bearing 3 can be fixed by rotating the lock nut 20 until it comes into contact with the bearing 3.
[Selection] Figure 2

Description

  The present invention relates to a nut with a pressing function for attaching or detaching a bearing mainly having an inner diameter tapered hole to a rotating shaft of various mechanical devices.

  FIG. 3A is a cross-sectional view showing a state in which a bearing is attached to a pivot, according to Conventional Example 1, and FIG. 3B is a schematic view showing a state in which a tool is mounted on a nut.

  An adapter sleeve 2 having a tapered outer peripheral surface is attached to the pivot 1. When the bearing 3 is attached to the tapered outer peripheral surface of the adapter sleeve 2, an inner diameter surface 4 a (mounting hole) of the inner ring 4. Is also formed in a tapered shape. In FIG. 3, reference numeral 5 is an outer ring, reference numeral 6 is a roller rolling element, and reference numeral 7 is a cage.

  As described above, when the inner diameter surface 4 a (mounting hole) of the tapered inner ring 4 is fitted and fixed to the tapered outer peripheral surface of the adapter sleeve 2, the lock nut 10 is tightened with the special wrench 11. The inner ring 4 is fixed while being pressed.

  Similarly, a special wrench 11 is used when removing the bearing 3 from the pivot 1.

  FIG. 4 is a cross-sectional view illustrating a state in which a bearing is attached to a pivot according to the second conventional example. This conventional example 2 is a mounting method in the case of a large-sized bearing whose bearing inner diameter exceeds 200 mm.

  When the inner diameter of the bearing exceeds 200 mm, a large torque is required when turning the special wrench 11, and the mounting of the bearing 3 is difficult. Therefore, high pressure oil is sent from the oil injection pump 12 to the inner diameter surface 4a of the adapter sleeve 2 and the inner ring 4 of the bearing 3, and the lock nut 10 is rotated in order to reduce the friction of the fitting surface and expand the inner ring 4. Torque reduction is implemented.

  However, in the case of Conventional Example 1 (FIG. 3), a dedicated special wrench 11 is required when attaching or removing the bearing, which may be costly.

  Further, in the case of Conventional Example 2 (FIG. 4), there is a problem that a hydraulic device is required for mounting or removing the bearing, so that the cost is increased and the working place is limited.

The present invention has been made in view of the circumstances as described above, and eliminates the need for a special tool, thereby reducing the cost and easily mounting / removing the bearing without restricting the work place. An object of the present invention is to provide a nut with a pressing function that makes it possible.

In order to achieve the above object, a nut with a pressing function according to claim 1 of the present invention is a nut with a pressing function used when a bearing is attached to or removed from a pivot.
At least two through holes penetrating in the axial direction are formed along the circumferential direction.

  According to the present invention, at least two through holes extending in the axial direction are formed in the nut with a pressing function along the circumferential direction. Therefore, when mounting or removing the bearing on the pivot, This can be done as follows.

  When attaching the bearing to the pivot, a nut with a pressing function is attached halfway to a screw portion such as the pivot. In this state, at least two or more bolts are inserted into at least two through holes formed in the nut and gradually tightened. Thereby, the end surface of the inner ring | wheel of a bearing is pressed in the front-end | tip of a volt | bolt, a bearing is extruded ahead, and it can attach to a pivot.

  After the bearing is installed, the position of the bearing can be fixed by rotating the nut until it comes into contact with the bearing. Since it is not necessary to extrude a bearing simultaneously when rotating a nut, a nut can be rotated easily.

  Similarly, when removing the bearing, the nut is attached to the middle or the end, and in this state, at least two or more bolts are inserted into at least two through holes of the nut and gradually tightened. Thus, it can be removed in substantially the same manner as in the case of attachment.

  From the above, by eliminating the need for special tools, the cost can be reduced and the bearings can be easily installed and removed without restricting the working place.

  Hereinafter, a nut with a pressing function according to an embodiment of the present invention will be described with reference to the drawings.

  Fig.1 (a) is a side view of the lock nut with a press function which concerns on embodiment of this invention, (b) is sectional drawing along the bb line of (a).

  Fig.2 (a) is sectional drawing which shows the state which attaches a bearing to a pivot with the lock nut with a press function which concerns on embodiment of this invention, (b) removes a bearing from a pivot with the lock nut. It is sectional drawing which shows a state.

  As shown in FIGS. 1 (a) and 1 (b), the lock nut 20 with a pressing function is formed with at least two through holes 21 penetrating in the axial direction along the circumferential direction. A plurality of stopper mounting notches 22 are formed on the outer peripheral edge of the lock nut 20.

  As shown in FIG. 2A, an adapter sleeve 2 having a tapered outer peripheral surface is attached to the pivot 1, and when the bearing 3 is attached to the tapered outer peripheral surface of the adapter sleeve 2, The inner diameter surface 4a (mounting hole) of the inner ring 4 is also formed in a tapered shape. In FIG. 2, reference numeral 5 is an outer ring, reference numeral 6 is a roller rolling element, and reference numeral 7 is a cage.

  As described above, when the inner diameter surface 4a (mounting hole) of the tapered inner ring 4 is fitted and fixed to the tapered outer peripheral surface of the adapter sleeve 2, in this embodiment, the lock nut 20 with a pressing function is used. Is partially attached to the screw portion 2a of the adapter sleeve 2.

  In this state, at least two or more bolts 30 are inserted into at least two through holes 21 formed in the lock nut 20 and gradually tightened. Thereby, the end face of the inner ring 4 of the bearing 3 is pressed at the tip of the bolt 30, and the bearing 3 is pushed forward and can be attached to the pivot 1.

  After the bearing 3 is attached, the position of the bearing 3 can be fixed by rotating the lock nut 20 until it comes into contact with the bearing 3. Since it is not necessary to push out the bearing 3 simultaneously when rotating the lock nut 20, the lock nut 20 can be easily rotated.

  Similarly, when removing the bearing 3, the lock nut 20 is attached to the middle or the end of the threaded portion 2a of the adapter sleeve 2, and in this state, at least two through-holes 21 of the lock nut 20 are at least 2 Insert more bolts 30 and tighten them gradually.

  As a result, the end face of the inner ring 4 of the bearing 3 is pressed at the tip of the bolt 30, the adapter sleeve 2 is pushed backward, and can be removed from the pivot 1.

  As described above, in the present embodiment, by eliminating the need for a special tool, the cost can be reduced, and the bearing can be easily mounted and removed without restricting the work place.

  In addition, this invention is not limited to embodiment mentioned above, A various deformation | transformation is possible.

(A) is a side view of the lock nut with a press function which concerns on embodiment of this invention, (b) is sectional drawing along the bb line of (a). (A) is sectional drawing which shows the state which attaches a bearing to a pivot with the lock nut with a press function which concerns on embodiment of this invention, (b) is the state which removes a bearing from a pivot with the lock nut. It is sectional drawing shown. (A) is sectional drawing which concerns on the prior art example 1, and shows the state which attaches a bearing to a pivot, (b) is a schematic diagram which shows the state which mounted | wore the tool with the nut. It is sectional drawing which concerns on the prior art example 2, and shows the state which attaches a bearing to a pivot.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pivot 2 Adapter sleeve 2a Thread part 3 Bearing 4 Inner ring 4a Inner diameter surface (mounting hole)
5 outer ring 6 roller rolling element 7 cage 10 lock nut 11 special wrench 12 oil injection pump 20 lock nut with pressing function 21 through hole 22 notch for attaching stopper plate 30 bolt

Claims (1)

A nut with a pressing function used when installing or removing a bearing on a pivot,
A nut with a pressing function, wherein at least two through holes penetrating in the axial direction are formed along a circumferential direction.

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