U.S. patent application number 12/003793 was filed with the patent office on 2008-07-24 for grinding assembly.
This patent application is currently assigned to WINSA Industrial Co., Ltd.. Invention is credited to Chia-Chun Chao.
Application Number | 20080176493 12/003793 |
Document ID | / |
Family ID | 39198945 |
Filed Date | 2008-07-24 |
United States Patent
Application |
20080176493 |
Kind Code |
A1 |
Chao; Chia-Chun |
July 24, 2008 |
Grinding assembly
Abstract
A grinding assembly includes a motor with a transmission pipe
connected thereto and a male connector is connected to the
transmission pipe. A spiral pipe is received in the transmission
pipe and a steel cable extends through the spiral pipe. A distal
end of the steel cable is connected to a driving member which
extends through a passage in the male connector. A handle has a
female connector which is connected with the male connector. The
female connector includes an axle received therein which includes a
connection hole defined in a first end thereof. The driving member
is engaged with the connection hole. A grinding wheel is connected
to a second end of the axle. A bearing is received in the male
connector and the driving member extends through the bearing so
that when the driving member rotates, the driving member does not
contact with an inner periphery of the passage and can be operated
at high speed.
Inventors: |
Chao; Chia-Chun; (Taichung
County, TW) |
Correspondence
Address: |
Chao, Chia-Chun
P.O.Box 44-2049
Taipei
10668
omitted
|
Assignee: |
WINSA Industrial Co., Ltd.
|
Family ID: |
39198945 |
Appl. No.: |
12/003793 |
Filed: |
January 2, 2008 |
Current U.S.
Class: |
451/294 |
Current CPC
Class: |
B24B 23/02 20130101;
B24B 47/12 20130101; B24B 27/027 20130101 |
Class at
Publication: |
451/294 |
International
Class: |
B24B 5/00 20060101
B24B005/00 |
Foreign Application Data
Date |
Code |
Application Number |
Jan 19, 2007 |
TW |
096201038 |
Claims
1. A grinding assembly comprising: a motor; a transmission pipe
having one end connected to the motor and a male connector
connected to the other end of the transmission pipe, the
transmission pipe including soft hose and a guide pipe which is
received in the soft hose, the soft hose including a plastic outer
pipe and an inner bellow pipe received in the plastic outer pipe,
the guide pipe including a spiral pipe and a steel cable which
extending through the spiral pipe, a distal end of the steel cable
connected to a driving member which extends through a passage in
the male connector; a handle having a female connector which is
connected with the male connector, the female connector including
an axle received therein and the axle including a connection hole
defined in a first end thereof, the driving member engaged with the
connection hole, a grinding wheel connected to a second end of the
axle, and a bearing received in the male connector and the driving
member extending through the bearing so that a gap defined between
an inner periphery of the passage and the driving member.
2. The assembly as claimed in claim 1, wherein the passage includes
a first space and a second space, the first space being larger than
the second space, the bearing is engaged with the first space.
3. The assembly as claimed in claim 1, wherein a bail is connected
to the motor.
Description
BACKGROUND OF THE INVENTION
[0001] (1) Field of the Invention
[0002] The present invention relates to a grinding assembly with a
bearing cooperated with the driving member so as to work at high
speed and low heat is generated. The vibration for the grinding
assembly is reduced and the term of use for the hose set can be
increased.
[0003] (2) Description of the Prior Art
[0004] A conventional grinding assembly used in grinding
sculptures, polishing objects and grinding jewelry is shown in
FIGS. 1 and 2, and generally includes a motor 1, a transmission
pipe 2 connected to the motor 1, a handle 3 which includes a
grinder which is driven by the motor 1 via the transmission pipe 2.
The motor 1 is connected with a bail 11 and can be hanged on a
wall. The transmission pipe 2 includes a plastic outer pipe 21 and
a guide pipe 22 is received in the plastic outer pipe 21. The
plastic outer pipe 21 includes a plastic pipe 211 and a flexible
inner bellow pipe 212 is received in the plastic pipe 211. The
guide pipe 22 includes a spiral pipe 221 and a steel cable 222 is
received in the spiral pipe 221. The distal end of the steel cable
222 is connected to a driving member 223 which extends through a
male connector 23 and is engaged with a connection hole 321 in an
axle 32 in a handle 3. The handle 3 includes a female connector 31
with which the male connector 23 is engaged. When the motor 1 is
activated, the steel cable 222 drives the driving member 223 which
rotates the axle 32 in the handle 3 to grind the object by a
grinding member connected to the axle 32.
[0005] However, the distal end of the guide pipe 22 is the weakest
part of the guide pipe 22 and the driving member 223 generates high
frequency of vibration so that the conventional grinding assembly
can only be operated at maximum revolution of 1800 rpm. Besides,
the driving member 223 is in contact with the inner periphery of
the passage in the male connector 23 so that high temperature is
generated and the male connector 23 sometimes is broken by the
vibration and high temperature. The vibration of the driving member
223 causes the grinding member to be difficult to control so that
the conventional grinding assembly cannot be used for precision
grinding. Furthermore, the guide pipe 22 might be broken and injure
people.
[0006] The present invention intends to provide a grinding assembly
wherein the driving member is supported by a bearing so that the
driving member can operation at high speed without causing too much
friction and heat.
SUMMARY OF THE INVENTION
[0007] The present invention relates to a grinding assembly which
comprises a motor and a transmission pipe has one end connected to
the motor and a male connector is connected to the other end of the
transmission pipe. The transmission pipe includes soft hose and a
guide pipe which is received in the soft hose. The soft hose
includes a plastic outer pipe and an inner bellow pipe is received
in the plastic outer pipe. The guide pipe includes a spiral pipe
and a steel cable which extends through the spiral pipe. A distal
end of the steel cable is connected to a driving member which
extends through a passage in the male connector. A handle has a
female connector which is connected with the male connector. The
female connector includes an axle received therein and the axle
includes a connection hole defined in a first end thereof. The
driving member is engaged with the connection hole. A grinding
wheel is connected to a second end of the axle. A bearing is
received in the male connector and the driving member extends
through the bearing.
[0008] The present invention will become more obvious from the
following description when taken in connection with the
accompanying drawings which show, for purposes of illustration
only, a preferred embodiment in accordance with the present
invention.
BRIEF DESCRIPTION OF THE DRAWINGS
[0009] FIG. 1 is an exploded view to show a conventional grinding
assembly;
[0010] FIG. 2 is a cross sectional view to show the conventional
grinding assembly;
[0011] FIG. 3 is an exploded view to show the grinding assembly of
the present invention;
[0012] FIG. 4 is a perspective view to show the grinding assembly
of the present invention, and FIG. 5 is a cross sectional view to
show the grinding assembly of the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0013] Referring to FIGS. 3 to 5, the grinding assembly of the
present invention comprises a motor 4 with a bail 41 connected
thereto so that the motor 4 can be hanged on a wall. A transmission
pipe 5 has one end connected to the motor 4 and a male connector 53
is connected to the other end of the transmission pipe 5. The male
connector 53 includes a passage 531 which includes a first space
and a second space. The first space is larger than the second
space.
[0014] The transmission pipe 5 includes a soft hose 51 and a guide
pipe 52 which is received in the soft hose 51, the soft hose 51
includes a plastic outer pipe 511 and an inner bellow pipe 512
received in the plastic outer pipe 511. The guide pipe 52 includes
a spiral pipe 521 and a steel cable 522 which extending through the
spiral pipe 521. A distal end of the steel cable 522 is connected
to a driving member 523 which extends through the passage 531 in
the male connector 53. A bearing 532 is received in the first space
of the passage 531 of the male connector 53 and the driving member
523 extends through the bearing 532 so that a gap defined between
an inner periphery of the passage 531 and the driving member
523.
[0015] A handle 6 has a female connector 61 which is connected with
the male connector 53. The female connector 61 includes an axle 62
received therein and the axle 62 includes a connection hole 621
defined in a first end thereof. The driving member 523 is engaged
with the connection hole 621 so as to drive the axle 62. A grinding
wheel is connected to a second end of the axle 62.
[0016] The bearing 532 supports the driving member 523 which can be
operated at high speed without generating too much vibration. The
maximum speed can reach 3000 rpm. A gap is defined between the
driving member 523 and the inner periphery of the passage 531 so
that no friction causing high heat when operating the grinding
assembly. The user holds the handle 6 which does not shake and have
high temperature so that the grinding assembly can be used on
precision grinding.
[0017] While we have shown and described the embodiment in
accordance with the present invention, it should be clear to those
skilled in the art that further embodiments may be made without
departing from the scope of the present invention.
* * * * *