GB2476113A

GB2476113A - Removal and installation tool for a ring insert

Info

Publication number: GB2476113A
Application number: GB0921788A
Authority: GB
Inventors: lai-cheng Liu
Original assignee: Cosda Manufacturing Co
Current assignee: Cosda Manufacturing Co
Priority date: 2009-12-12
Filing date: 2009-12-12
Publication date: 2011-06-15
Anticipated expiration: 2029-12-12
Also published as: GB0921788D0; GB2476113B

Abstract

The tool for an insert such as a bearing 2 includes a push collar 20, a push sleeve 30 and an abut sleeve 50. The collar has a first push surface 21 and a second push surface 22, at least one of which is formed with at least two concentric and spaced inserting groove units 24. A distance between at least one of the inserting groove units and a center of the push collar is different from that between any other inserting groove unit and the center of the push collar. The push sleeve has a first push end 31 and a second push end 32. The first push end corresponds to and can be mounted into one of the inserting groove units. The second push end is adapted to push the ring insert. The abut sleeve has a first abut end 51 and a second abut end 52 adapted to abut against the shaft bore unit 3. A means for pushing the push collar along with the push sleeve toward the abut sleeve may include a threaded axle rod 10 and threaded positioning units 40, 60.

Description

REMOVAL AND INSTALLATION TOOL FOR A RING INSERT

BACKGROUND OF THE INVENTION

Field of the Invention

The present invention relates to a removal and installation tool for a ring insert.

Description of the Prior Art

To conveniently remove a ring insert such as a bearing from a shaft bore unit, which is an article with a shaft bore, a tool is provided as disclosed in US 1897737, which uses a cylindrical body (14) to push a ring (18) to further move a bearing in or out of a shaft bore.

In order to correspond to bearings having different dimensions, a modified tool is provided as disclosed in US 1972455 and EP 1837127. These two patents disclose a member having a stepped construction for different bearings to sleeve therearound.

US 4050136 discloses yet another modified tool including a member having a stepped construction. The member is advantageous in that it is expandable and includes several expandable segments, so as to further correspond to a variety of bearings with different dimensions.

Although US 1972455, EP 1837127 and US 4050136 provide a stepped design to correspond to bearings of several sizes, the stepped structure thereof inevitably increases the length and volume of the member.

The present invention is, therefore, arisen to obviate or at least mitigate the above mentioned disadvantages.

SUMMARY OF THE INVENTION

The main object of the present invention is to provide a tool with smaller collar to correspond to a variety of bearings of different sizes.

To achieve the above and other objects, a removal and installation tool of the present invention includes a push collar, which is formed with at least two concentric and spaced inserting groove units. Thereby the tool is adapted to push a ring insert into or out of a shaft bore.

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.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a breakdown drawing showing a preferred embodiment of the present invention; Fig. 2 is a combination drawing showing a preferred embodiment of the present invention; Fig. 3 is an AA profile of Fig. 2; Fig. 4 is a perspective view showing a push collar of the present invention; Fig. 5 is a profile showing a push collar of the present invention; Fig. 6 is a perspective view showing a push collar and a push sleeve in accordance with anther preferred embodiment of the present invention; Fig. 7 is a perspective view showing a push collar corresponding to different push sleeves of the present invention; Fig. 8 is a profile showing a push collar mounted with a push sleeve of the present invention; Fig. 9 is a profile showing a push collar mounted with a push sleeve of the present invention; Fig. 10 is a profile showing a push collar mounted with a push sleeve of the present invention; Fig. 11 is a profile showing a push collar mounted with a push sleeve of the present invention; Fig. 12 is a profile showing a push collar mounted with a push sleeve of the present invention; Fig. 13 is a perspective drawing showing a tool of the present invention; Fig. 14 is a perspective drawing showing a tool of the present invention; Fig. 15 is a perspective drawing showing a tool in accordance with another preferred embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Please refer to Fig. 1 to Fig. 3 for a preferred embodiment of the present invention. A removal and installation tool 1 of the present invention is adapted to remove a ring insert, such as a bearing 2, a bushing, a sleeve or the like, from a shaft bore unit 3, or to install the ring insert into the shaft bore unit 3. The shaft bore unit 3 has a shaft bore 4 for the bearing 2 or the like to install therein. The removal and installation tool 1 includes an axle rod 10, a push collar 20, a push sleeve 30, a first positioning unit 40, an abut sleeve 50, a second positioning unit 60, an abut collar 70 and a first bearing 81.

The axle rod 10 inserts through the bearing 2 and the shaft bore 4 of the shaft bore unit 3. And the axle rod 10 is threaded.

The push collar 20 has a push collar bore 23 for the axle rod 10 to insert therethrough. The push collar 20 has a first push surface 21 and a second push surface 22 opposite to the first push surface 21. At least one of the push surfaces 21 and 22 is formed with at least two concentric and spaced inserting groove units 24.

As shown in Fig. 4 and Fig. 5, both push surfaces 21 and 22 of the present embodiment are formed with at least two concentric and spaced inserting groove units 24 respectively. A distance between at least one of the inserting groove units 24 and a center of the push collar 20 is different from that between any other inserting groove unit 24 and the center of the push collar 20. As such, the push collar 20 is adapted for ring inserts with different sizes but is still small in size. Each inserting groove unit 24 has at least one inserting groove 25 at least partially surrounding the center of the push collar 24. In the embodiment shown in Fig. 1 to Fig. 5, each inserting groove unit 24 has only one circular inserting groove 25, and each inserting groove 25 has a radius (or curvature) different from the others. In the other embodiment shown in Fig. 6, each inserting groove unit 24 has several spaced inserting grooves 25'. The inserting grooves 25' are arc shaped in the present embodiment, yet they may be design in other shape such as circle, rectangle or other

suitable shapes.

The push sleeve 30 has a push sleeve 33 for the axle rod 10 to insert therethrough. The push sleeve 30 has a first push end 31 and a second push end 32.

The first push end 31 is an inserting end corresponding to and mounted with one of the inserting groove units 24, and the second push end is adapted to push the bearing 2. The outer diameter of the push sleeve 30 is preferably smaller than the bore diameter of the shaft bore 4, such that the push sleeve 30 itself can be inserted into the shaft bore 4 to push the bearing 2 out. In the embodiment shown in Fig. 1 to Fig. 5, the first push end 31 of the push sleeve 30 is substantially annular shaped to correspondingly mount with the annular inserting groove 25. In the other embodiment shown in Fig. 6, the inserting end is in a concave and convex shape so as to correspond to the spaced inserting grooves 25'. As such, the relative rotation between the push collar 20 and the push sleeve 30 can be forbidden. The first push end 31, i.e. the inserting end has a thickness smaller than a width of its corresponding inserting groove units 24, so that one inserting groove unit 24 can correspond to several push sleeves 30 with different dimensions, as shown in Fig. 7 to Fig. 9, Further, the inserting end may be formed into a stepped shape and has a smaller thickness than other parts of the push sleeve 30. The thickness of the stepped inserting end is preferably smaller than the width of its corresponding inserting groove unit 24, so that one inserting groove unit 24 can correspond to several push sleeve 30 with different dimensions, as shown in Fig. 7 and Fig. 10 to Fig. 12. More specifically, the inner surface of the inserting end may flush with that of the push sleeve 30 as shown in Fig. 10, the outer surface of the inserting end may flush with that of the push sleeve 30 as shown in Fig. 11, or the inserting end may locate at a middle portion of the first push end 31 along a thickness direction of the push sleeve as shown in Fig. 12. Note that as the dimension of the push sleeve 30 varies, i.e. as the outer diameter thereof varies, the removal and installation tool 1 is, therefore, * adapted for a ring insert of different size.

The first positioning unit 40 is movably threaded on the axle rod 10. The push collar 20 locates between the first positioning unit 40 and the push sleeve 30.

The first positioning unit 40 is adapted to push the push collar 20 and the push sleeve 30 toward the bearing 2 and the shaft bore unit 3. The first positioning unit 40 may be provided with a polygonal head 41 for a wrench to drive, or it may be radially formed with handle bars or the like for the user to directly apply force thereon. To prohibit the push collar 20 from rotating along with the first positioning unit 40, the first bearing 81 is disposed therebetween. Thereby, the first positioning unit 40 can rotate with respect to the push collar 20.

The abut sleeve 50 has an abut sleeve bore 53 for the axle rod 10 to insert therethrough. The abut sleeve 50 has a first abut end 51 and a second abut end 52.

The second abut end 52 of the abut sleeve 50 is adapted to abut against the shaft bore unit 3, and an inner diameter of the abut sleeve 50 is bigger than the bore diameter of the shaft bore 4, such that the bearing 2 can be pushed into the abut sleeve bore 53 from the shaft bore 4.

The second positioning unit 60 is securely disposed on the axle rod 10 and is adapted to abut against the abut sleeve 50, so as to fix the abut sleeve 50 between the shaft bore unit 3 and the second positioning unit 60. Preferably, an abut collar 70 is provided and locates between the abut sleeve 50 and the second positioning unit 60. The structure of the abut collar 70 is similar to the push collar 20, in which the abut collar 70 has a plurality of inserting groove units 71 substantially identical to the inserting groove units 24 for the first abut end 51 of the abut sleeve 50 to insert * therein.

In other embodiments of the present invention, the second positioning unit may be designed to be movably threaded on the axle rod 10. In such case, a second bearing can be disposed between the second positioning unit 60 and the abut collar 70, such that the second positioning unit 60 can rotate with respect to the abut collar 70.

For observation purposes, each of the collars 30, 50 may be formed with two opposite slots 35, 55 axially extended from the second ends 32, 52. As such, the user may observe the installation or removal process through the slots.

In yet another embodiment shown in Fig. 15, the removal and installation tool includes the above mentioned push collar, push sleeve and abut sleeve. And the tool is provided with a means for pushing the push collar and the push sleeve toward the abut sleeve. The pushing means includes a hydraulic unit 90 and a frame 95. The hydraulic unit 90 has a pushing rod 91 to push the push collar. The frame 95 has a first plate 96, a second plate 97 and at least two supportive rods 98 disposed between the plates 96 and 97. The hydraulic unit 90 is disposed on the first plate 96, and the first end of the abut sleeve abut against the second plate 97. As such, the pushing rod 91 can push the push collar to install a ring insert into a shaft bore unit or to remove a ring insert from a shaft bore unit.

With the help of the removal and installation tool 1 of the present invention, the user can manually screw one of the positioning units 40 and 60 to remove or install the ring insert, as shown in Fig. 13 and Fig. 14. Due to the inserting groove units of different diameters, the tool is adapted for ring inserts of different sizes.

-Such design is also advantageous in that its length and volume can be significantly reduced and is less complex.

Claims

WHAT IS CLAIMED IS: 1. A removal and installation tool for a ring insert disposed in a shaft bore unit, the tool comprising: an axle rod, inserting through the ring insert and the shaft bore unit; a push collar, having a push collar bore for the axle rod to insert therethrough, the push collar having a first push surface and a second push surface opposite to the first push surface, at least one of the push surfaces being formed with at least two concentric and spaced inserting groove units, a distance between at least one of the inserting groove units and a center of the push collar being different from that between any other inserting groove unit and the center of the push collar, each inserting groove unit having at least one inserting groove at least partially surrounding the center of the push collar; a push sleeve, having a push sleeve bore for the axle rod to insert therethrough, the push sleeve having a first push end and a second push end, the first push end being an inserting end corresponding to and mounted with one of the inserting groove units, the second push end being adapted to push the ring insert; a first positioning unit, the push collar being located between the first positioning unit and the push sleeve, the first positioning unit being adapted to push the push collar and the push sleeve toward the ring insert; an abut sleeve, having an abut sleeve bore for the axle rod to insert therethrough, the abut sleeve having a first abut end and a second abut end, the second abut end being adapted to abut against the shaft bore unit; and a second positioning unit, being adapted to abut against the abut sleeve, so * as to fix the abut sleeve between the shaft bore unit and the second positioning unit; wherein at least one of the positioning units is movably threaded on the axle rod.
2. The tool of claim 1, wherein a thickness of the inserting end is smaller than a width of its corresponding inserting groove unit, whereby each inserting groove unit is adapted for pushing sleeves with different dimensions.
3. The tool of claim 1, wherein the inserting end is stepped and has a smaller thickness than other parts of the pushing sleeve, the thickness of the inserting end being smaller than a width of its corresponding inserting groove unit, whereby each inserting groove unit is adapted for pushing sleeves with different dimensions.
4. The tool of claim 1, wherein each inserting groove unit has several spaced inserting grooves, the inserting end is in a concave and convex shape so as to correspond to the inserting grooves.
5. The tool of claim 1, wherein each inserting groove unit has only one circular inserting groove.
6. The tool of claim 1, further comprising an abut collar disposed between the abut sleeve and the second positioning unit, the abut collar having an abut collar bore for the axle rod to insert therethrough, the abut collar having a first abut surface and a second abut surface opposite to the first abut surface, at least one of the abut surfaces being formed with at least two concentric and spaced inserting groove units, a distance between at least one of the inserting groove units and a center of the abut collar being different from that between any other inserting groove unit and the center of the abut collar, each inserting groove unit having at least one inserting I0 groove at least partially surrounding the center of the push collar for the first abut end of the abut sleeve to insert therein.
7. The tool of claim 6, wherein a first bearing is disposed between the first positioning unit and the push collar, a second bearing is disposed between the second positioning unit and the abut collar, whereby the first and second positioning units is rotatable about the centers of the push collar and the abut collar respectively.
8. The tool of claim 1, wherein the push sleeve has two opposite slots axially extended from the second push end thereof, the abut sleeve has two opposite slots axially from the second abut end thereof.
9. The tool of claim 1, wherein both push surfaces of the push collar are formed with at least two concentric and spaced inserting groove units respectively, a distance between at least one of the inserting groove units and a center of the push collar being different from that between any other inserting groove unit and the center of the push collar.
10. The tool of claim 3, wherein an inner surface of the inserting end is flush with an inner surface of the push sleeve.
11. The tool of claim 3, wherein an outer surface of the inserting end is flush with an outer surface of the push sleeve.
12. The tool of claim 3, wherein the inserting end locates at a middle portion of the first push end along a thickness direction of the push sleeve.
13. A removal and installation tool for a ring insert disposed in a shaft bore unit, the tool comprising: a push collar, having a first push surface and a second push surface oppositeII* to the firs push surface, at least one of the push surfaces being formed with at least two concentric and spaced inserting groove units, a distance between at least one of the inserting groove units and a center of the push collar being different from that between any other inserting groove unit and the center of the push collar, each inserting groove unit having at least one inserting groove at least partially surrounding the center of the push collar; a push sleeve, having a first push end and a second push end, the first push end being an inserting end corresponding to and mounted with one of the inserting groove units, the second push end being adapted to push the ring insert; an abut sleeve, having a first abut end and a second abut end, the second abut end being adapted to abut against the shaft bore unit; and a means for pushing the push collar along with the push sleeve toward the abut sleeve.
14. A removal and installation toll substantially as hereinbefore described with reference to and as shown in the accompanying drawings.AMENDMENTS TO THE CLAIMS HAVE BEEN FILED AS FOLLOWS1. A removal and installation tool for a ring insert disposed in a shaft bore unit, the tool comprising: an axle rod which can be inserted, in use, in the ring insert and the shaft bore unit; a push collar, having a push collar bore for the axle rod to pass therethrough, the push collar having a first push surface and a second push surface opposite to the first push surface, at least one of the push surfaces being formed with at least two concentric and spaced channels, the distance between at least one of the channels and the center of the push collar being different from that between any other channel * *.* * and the center of the push collar, each channel facing outwardly and at least partially **....surrounding the center of the push collar; a push sleeve, having a bore in which, in use, the axle rod can be inserted, S..:.,:: the push sleeve having a first push end and a second push end, the first push end * : being an inserting end corresponding to and arranged for fitment in one of the channels, the second push end being adapted to push the ring insert; a first positioning unit, the push collar being located between the first positioning unit and the push sleeve, the first positioning unit being adapted to push the push collar and the push sleeve toward the ring insert when the tool is in use; an abutment sleeve, having a bore in which, in use, the axle rod can be inserted, the abutment sleeve having a first abutment end and a second abutment end, the second abutment end being adapted to abut against the shaft bore unit; and a second positioning unit, which is adapted to abut against the abutment * 14 sleeve so as, in use, to fix the abutment sleeve between the shaft bore unit and the second positioning unit; wherein at least one of the positioning units is movably threaded on the axle rod.2. A tool as claimed in claim 1, wherein the inserting end is stepped and has a smaller thickness than other parts of the pushing sleeve, the thickness of the inserting end being smaller than the width of the corresponding channel, and each channel being adapted to receive pushing sleeves of different dimensions.3. A tool as claimed in claim 1, wherein each channel includes several arc-shaped portions.4. A tool as claimed in claim 1, wherein each channel is of annular form.I* 5. A tool as claimed in claim 1, further comprising an abutment collar I. : disposed between the abutment sleeve and the second positioning unit, the abutment S. S collar having a bore in which, in use, the axle rod is inserted, the abutment collar
15. having a first abutment surface and a second abutment surface opposite to the first abutment surface, at least one of the abutment surfaces being formed with at least two concentric channels, the distance between at least one of the channels and the center of the abutment collar being different from that between any other channel and the center of the abutment collar, there being a channel at least partially surrounding the center of the push collar in which, in use, the first abutment end of the abutment sleeve is inserted.6. A tool as claimed in claim 5, wherein a first bearing is disposed between the first positioning unit and the push collar, and a second bearing is disposed * 15 between the second positioning unit and the abutment collar, whereby the first and second positioning units are rotatable about the centers of the push collar and the abutment collar respectively.7. A tool as claimed in claim 1, wherein the push sleeve has two opposite slots axially extending from the second push end thereof, and the abutment sleeve has two opposite slots extending axially from the second abutment end thereof.8. A tool as claimed in claim 1, wherein both push surfaces of the push collar are formed with at least two concentric channels and in which the distance between at least one of the channels and the center of the push collar is different from that between any other channel and the center of the push collar. S...9. A tool as claimed in claim 2, wherein an inner surface of the inserting end * S* . .* is flush with an inner surface of the push sleeve.10. A tool as claimed in claim 2, wherein an outer surface of the inserting end is flush with an outer surface of the push sleeve.*: 1 11. A tool as claimed in claim 2, wherein the inserting end locates at a middle portion of the first push end along a thickness direction of the push sleeve.12. A removal and installation tool for a ring insert disposed in a shaft bore unit, the tool comprising: a push collar, having a first push surface and a second push surface opposite to the first push surface, at least one of the push surfaces being formed with at least two concentric outwardly facing channels with the distance between at least one of the channels and the center of the push collar being different from that between any other channel and the center of the push collar; a push sleeve, having a first push end and a second push end, the first push end being an inserting end corresponding to and arranged for fitment, in use, in one of the channels, the second push end being adapted to push the ring insert when the tool is in use; an abutment sleeve, having a first abutment end and a second abutment end, the second abutment end being adapted to abut against the shaft bore unit; and means for pushing the push collar along with the push sleeve toward the abutment sleeve.13. A removal and installation toll substantially as hereinbefore described with reference to and as shown in the accompanying drawings. * a * a a. I *a*S *5*S a. a. * P * ,Sa.....S I