Patent Application
20110214269
The present invention is related to a bearing puller, and more particularly to a bearing puller which can disassemble the bearing without damage.
Bearings are one of the most important components in the dynamic mechanical system. The bearing can be mounted between two machine parts, which have relative rotations, for reducing the fraction therebetween, so as to improve the operation efficiency, elongate the lifetime, and also save the energy.
Generally, the bearing is assembled with the machine parts in a tightly engaged manner, so that for disassembling the bearing, it always has to hammer the bearing. However, since the bearing is a component with precision, after being hammered, it is easy to lose the precision, in the result that the lifetime thereof will be reduced severely.
Accordingly, as shown in
However, in the disclosure above, only two claws 3 are employed to support the bearing 2 while the pushing bolt 5 is pushing the bearing 2, so that it is easily for the bearing 2 to suffer a lateral pressure if the supporting positions are not symmetrical, and as known, the lateral pressure will damage the bearing 2 and also affect the precision thereof.
The object of the present invention is to provide a bearing puller which can steadily clamp and hold the bearing without producing the lateral pressure to damage the bearing.
Therefore, the present invention provides a bearing puller for holding and disassembling a bearing, which is tightly engaged with a machine part. The bearing puller includes a fixing portion, a disassembling portion, a binding ring, and a sleeve, wherein the fixing portion includes an accommodating trough at one end thereof, the disassembling portion is mounted on the fixing portion, and the binding ring is located in the accommodating trough. The binding ring has therein a clamping space, wherein the binding ring has an inner diameter larger than an outer diameter of the bearing for sleeving on the bearing. The sleeve is screwed on the fixing portion to compress the inner diameter of the binding ring and to narrow down the clamping space, so as to grab and hold the bearing.
Accordingly, the disassembling portion can be screwed to produce a displacement relative to the fixing portion to reject against the machine part or can hit the fixing portion to produce a momentum, thereby causing a relative movement between the machine part and the bearing so as to disassemble the bearing from the machine part. Therefore, the present invention utilizes the binding ring to lock the bearing for providing a surface contact therebetween and thus steadily clamping the bearing, so that the bearing can be disassembled rapidly without damage. Consequently, the reusing possibility of the bearing can be increased and thus save the cost.
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The binding ring 60 is located in the accommodating trough 41. The binding ring 60 provides therein a clamping space 61, and has an inner diameter larger than an outer diameter of the bearing 30, so that the binding ring 60 can sleeve on the bearing 30. Further, the binding ring 60 includes a plurality of slots 611 peripherally formed on the binding ring 60 for surrounding the clamping space 61 so as to increase the flexibility of the clamping space 61, such that when the sleeve 70 is screwed onto the fixing portion 40A, it can compress the binding ring 60 and reduce the inner diameter of the binding ring 60 so as to grab and hold the bearing 30. Besides, the binding ring 60 includes an inward protruded rim 612 formed on an inner surface of the binding ring 60 for rejecting to the bottom edge of the bearing 30, so as to increase the stability in holding the bearing 30.
Moreover, the fixing portion 40A can comprise outer threads 43 mounted on an outer surface of the fixing portion 40A at the end having the accommodating trough 41 and the sleeve 70 also can have inner threads 71 corresponding to the outer threads 43, so that the sleeve 70 can be screwed onto the fixing portion 40A. And, the lower inner surface of the sleeve 70 further can comprise an inward protruded periphery 72 formed on an inner surface of the sleeve 70 for compressing the binding ring 60 as the sleeve 70 is screwed onto the fixing portion 40A, so as to reduce the inner diameter thereof. In addition, peripheral walls of the accommodating trough 41 and the sleeve 70 can respectively include a plurality of holes 44, 73 mounted therein for penetrating a bolt 80 (only shown in
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As described above, the present invention utilizes the binding ring 60 to lock the bearing 30 for providing a surface contact therebetween and not a point contact, so that the bearing 30 can be steadily clamped by the binding ring 60, thereby reducing the damage to the bearing 30. Consequently, even the bearing 30 had experienced multiple times of disassembling, the precision thereof still can be kept.
It is to be understood, however, that even though numerous characteristics and advantages of the present invention have been set forth in the foregoing description, together with details of the structure and function of the invention, the disclosure is illustrative only, and changes may be made in detail, especially in matters of shape, size, and arrangement of parts within the principles of the invention to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.
