Patent Application
20230082887
The present invention relates to a press tool.
Components are often connected by a variety of different connection structures such as socket-plug or male-female combination. In some circumstances, two components can rotate relatively, and it therefore requires shock-absorbing bushings or bearings to be disposed between the two components. To replace the components, the common way is that a tool is inserted into the hole to press the inner member and the tool is impacted to detach the inner member form the hole; however, it is very easy to damage the inner member and the inner surface of the hole.
The present invention is, therefore, arisen to obviate or at least mitigate the above-mentioned disadvantages.
The main object of the present invention is to provide a press tool which is configured to easily and stably detach members from a hole without damage thereto.
To achieve the above and other objects, a press tool configured to detach an inner member and a bushing from a receiving hole of a seat body is provided, wherein the bushing receives the inner member and is received in the receiving hole, and the press tool includes: a base, including a head portion, a body portion and a foot portion, the head portion and the foot portion being connected with the body portion and correspondingly separate in interval, the head portion including a threaded hole disposed therethrough, the foot portion including a through hole, a centroid position of the threaded hole and a centroid position of the body portion being located on a pressing direction; a threaded shaft, screwed with the threaded hole and movable in the pressing direction, including a first press portion, the first press portion being located between the threaded hole and the through hole and configured to press the inner member in the pressing direction to separate from the bushing and insert in the through hole; and an attachment member, detachably assembled to the first press portion, including a second press portion, the second press portion configured to press the bushing in the pressing direction to separate from the receiving hole and insert in the through hole.
The present invention will become more obvious from the following description when taken in connection with the accompanying drawings, which show, for purpose of illustrations only, the preferred embodiment(s) in accordance with the present invention.
Please refer to
The base 1 includes a head portion 11, a body portion 12 and a foot portion 13, the head portion 11 and the foot portion 13 are connected with the body portion 12 and correspondingly separate in interval, the head portion 11 includes a threaded hole 111 disposed therethrough, the foot portion 13 includes a through hole 131, and a centroid position of the threaded hole 111 and a centroid position of the body portion 12 is located on a pressing direction 5. In this embodiment, the threaded hole 111 is circular, the through hole 131 is circular, and an inner diametric dimension of the through hole 131 is larger than an inner diametric dimension of the threaded hole 111.
The threaded shaft 2 is screwed with the threaded hole 111 and movable in the pressing direction 5. Specifically, a ratio of an extent d2 of a threaded section 26 of the threaded shaft 2 and an extent d1 of the threaded hole 111 is 1.5 to 1.7. The threaded shaft 2 includes a first press portion 21, and the first press portion 21 is located between the threaded hole 111 and the through hole 131 and configured to press the inner member 72 in the pressing direction 5 to separate from the bushing 73 and insert in the through hole 131. Specifically, the first press portion 21 is disposed at one end of the threaded shaft 2, and a driving portion 23 is disposed at another end of the threaded shaft 2. The driving portion 23 includes an inner adaption hole 24 and an outer adaption portion 25, the inner adaption hole 24 is configured for insertion of a first connection member 61, and the outer adaption portion 25 is polygonal and configured to be inserted within a second connection member 62, so that the driving portion 23 can be driven by different driving tools. The attachment member 3 is detachably assembled to the first press portion 21, the attachment member 3 includes a second press portion 31, and the second press portion 31 is configured to press the bushing 73 in the pressing direction 5 to separate from the receiving hole 71 and insert in the through hole 131.
In detaching the inner member and the bushing, the foot portion 13 is abutted against the seat body 7, the inner member 72 is pressed by the first press portion 21, and the bushing 73 is then pressed by the second press portion 31. The two-stage pressing process makes the inner member 72 and the bushing 73 separate after the inner member 72 and the bushing 73 are detached, or it is optional to merely detach the inner member 72. In installing the inner member and the bushing, the inner member 72 and the bushing 73 are disposed at a side of the seat body 7 facing toward the head portion 11, and the threaded shaft 2 is then rotated to move to press the inner member 72 and the bushing 73 into the receiving hole 71 of the seat body 7, respectively.
In this embodiment, the second press portion 31 includes a pressing face 32 and an engagement portion 33, the engagement portion 33 is protrusive beyond the pressing face 32, the pressing face 32 is configured to be abutted against an end face of the bushing 73, and the engagement portion 33 is configured to be inserted within the bushing 73 (preferably, the engagement portion 33 is abutted radially against the inner surface of the bushing 73), which improves stability of pressing the bushing 73.
Preferably, the attachment member 3 is positionably sleeved on the first press portion 21, which is easy to assemble and disassemble and facilitates installation and uninstallation of the inner member 72 and the bushing 73.
Preferably, the press tool further includes a first frictional ring element 22 (such as a rubber ring), and the first frictional ring element 22 is disposed on at least one of an outer circumferential surface of the first press portion 21 and an inner circumferential of the attachment member 3. In this embodiment, the first frictional ring element 22 is inlaid within the outer circumferential surface of the first press portion 21, and when the attachment member 3 is disposed on the first press portion 21, the first frictional ring element 22 is pressed between the attachment member 3 and the first press portion 21. The first frictional ring element 22 can enhances combination of the attachment member 3 and the first press portion 21.
The press tool further includes a sleeve member 4, the inner member 72 includes a main body 721 and at least one projection 722, the at least one projection 722 projects axially from an end of the main body 721, and a largest outer diametric dimension of the main body 721 and a largest outer diametric dimension of the at least one projection 722 are smaller than the inner diametric dimension of the through hole 131. The sleeve member 4 is configured to receive the at least one projection 722 so that the sleeve member 4 is radially abuttable against an inner surface of the through hole 131 when the sleeve member 4 and the inner member 72 move into the through hole 131. The sleeve member 4 can compensate the gap between the inner member 72 and the through hole 131, which stabilizes movement of the inner member 72 during detachment. In this embodiment, the at least one projection includes two projections 722, and the two projections 722 extend from opposing sides of the main body 721, respectively.
Preferably, the press tool further includes a second frictional ring element 41, the second frictional ring element 41 is inlaid within an outer circumferential surface of the sleeve member 4, and when the sleeve member 4 moves into the through hole 131, the second frictional ring element 41 is pressed between the sleeve member 4 and the inner surface of the through hole 131, which stabilizes the movement of detached member.
The base 1 is preferably a forged solid metal member, so it is strong and durable. Two sides of the body portion 12 which are perpendicular to the pressing direction 5 each have a recess 121, and the recess 121 is configured for easy grip of the hand. A side of the foot portion 13 opposite to the head portion 11 includes an inclined face 132 which is tilted to the pressing direction.
Although particular embodiments of the invention have been described in detail for purposes of illustration, various modifications and enhancements may be made without departing from the spirit and scope of the invention. Accordingly, the invention is not to be limited except as by the appended claims.
