NZ759256B2 - Long-stroke automatic nut-tightening tooling - Google Patents
Long-stroke automatic nut-tightening tooling Download PDFInfo
- Publication number
- NZ759256B2 NZ759256B2 NZ759256A NZ75925619A NZ759256B2 NZ 759256 B2 NZ759256 B2 NZ 759256B2 NZ 759256 A NZ759256 A NZ 759256A NZ 75925619 A NZ75925619 A NZ 75925619A NZ 759256 B2 NZ759256 B2 NZ 759256B2
- Authority
- NZ
- New Zealand
- Prior art keywords
- bar
- sleeve
- revolving
- revolving sleeve
- nut
- Prior art date
Links
- 238000007906 compression Methods 0.000 claims description 8
- 238000010586 diagram Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 2
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/04—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for assembling or disassembling parts
- B23P19/06—Screw or nut setting or loosening machines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/04—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for assembling or disassembling parts
- B23P19/06—Screw or nut setting or loosening machines
- B23P19/065—Arrangements for torque limiters or torque indicators in screw or nut setting machines
- B23P19/066—Arrangements for torque limiters or torque indicators in screw or nut setting machines by electrical means
Abstract
The purpose of the present invention is to provide long-stroke automatic nut-tightening tooling, which can be used for tightening a nut in a long stroke, with high efficiency. For this purpose, the tooling comprises a soleplate; a positioning seat, by which a workpiece can be kept always to be vertical, is arranged on the soleplate; a rotary output mechanism is fixed above the positioning seat; the rotary output mechanism comprises a driving device, an inner revolving bar and an outer revolving sleeve; the driving device is linked with the inner revolving bar and used for enabling the inner revolving bar to revolve on its axis; the outer revolving sleeve is sheathed on and linked with the inner revolving bar, and the outer revolving sleeve is fitted on the inner revolving bar in a sliding way; the outer revolving sleeve is equipped with a lifting mechanism by which the outer revolving sleeve can move up and down; an accommodating groove for accommodating part or all of nuts is formed at a lower end of the outer revolving sleeve; and linkage structures, which are fitted with each other, are formed between an inner circumferential wall of the accommodating groove and an outer circumferential wall of a nut. cal, is arranged on the soleplate; a rotary output mechanism is fixed above the positioning seat; the rotary output mechanism comprises a driving device, an inner revolving bar and an outer revolving sleeve; the driving device is linked with the inner revolving bar and used for enabling the inner revolving bar to revolve on its axis; the outer revolving sleeve is sheathed on and linked with the inner revolving bar, and the outer revolving sleeve is fitted on the inner revolving bar in a sliding way; the outer revolving sleeve is equipped with a lifting mechanism by which the outer revolving sleeve can move up and down; an accommodating groove for accommodating part or all of nuts is formed at a lower end of the outer revolving sleeve; and linkage structures, which are fitted with each other, are formed between an inner circumferential wall of the accommodating groove and an outer circumferential wall of a nut.
Description
LONG-STROKE AUTOMATIC NUT-TIGHTENING TOOLING
Technical Field of the Invention
The present invention relates to long-stroke automatic nut-tightening
tooling.
Background of the Invention
Usually, nuts are screwed by wrenches or by some existing nut-tightening
devices. However, the existing devices can only be used to screw nuts in a
short stroke, instead of tightening nuts to long workpieces by threads.
Summary of the Invention
The purpose of the present invention is to provide long-stroke automatic
nut-tightening tooling, which can be used for tightening a nut in a long stroke,
with high efficiency.
For this purpose, the following technical solution is used in the present
invention. Long-stroke automatic nut-tightening tooling comprises a soleplate;
a positioning seat, by which a workpiece can be kept always to be vertical, is
arranged on the soleplate; a rotary output mechanism is fixed above the
positioning seat; the rotary output mechanism comprises a driving device, an
inner revolving bar and an outer revolving sleeve; the driving device is linked
with the inner revolving bar and used for enabling the inner revolving bar to
revolve on its axis; the outer revolving sleeve is sheathed on and linked with
the inner revolving bar, and the outer revolving sleeve is fitted on the inner
revolving bar in a sliding way; the outer revolving sleeve is equipped with a
lifting mechanism by which the outer revolving sleeve can move up and down;
an accommodating groove for accommodating part or all of nuts is formed at a
lower end of the outer revolving sleeve; linkage structures, which are fitted with
each other, are formed between an inner circumferential wall of the
accommodating groove and an outer circumferential wall of a nut; and when a
workpiece is positioned and fixed in the positioning seat, the workpiece is
coaxial to the outer revolving sleeve and the inner revolving bar.
When in use of the tooling of the present invention, the workpiece is
positioned and fixed on the positioning seat so that the workpiece is coaxial to
the outer revolving sleeve and the inner revolving bar; then, a nut is put on the
workpiece and the lifting mechanism is started, and the lifting mechanism
controls the outer revolving sleeve to descend so that the outer revolving
sleeve is sheathed on the outer side of the outer threaded rod of the workpiece;
the driving device is started, and as the outer revolving sleeve continues
moving downward, the nut enters the accommodating groove formed at the
lower end of the outer revolving sleeve; by the driving device, the inner
revolving bar drives the outer revolving sleeve to rotate in order to rotate the
nut, and as the outer revolving sleeve continues moving downward, the nut is
tightened downward along the workpiece. The tooling of the present invention
can screw nuts to long workpieces. The production efficiency is improved. In
addition to tightening nuts to long workpieces, the tooling of the present
invention is applicable to tightening nuts to short workpieces. The stroke is
related to the sliding stroke of the outer revolving sleeve. Outer revolving
sleeves with different axial motion strokes are selected, depending upon actual
requirements. The driving device of the rotary output mechanism may be fixed
on the upper side of the soleplate in various ways, for example, supported
above the soleplate by a bracket.
Preferably, the linkage structure comprises a driving plane on the inner
circumferential wall of the accommodating groove and a stressed plane on the
outer circumferential wall of the nut, and the outer revolving sleeve revolves on
its axis so that the driving plane is pressed against the stressed plane of the
nut; the outer circumferential wall of the nut is regular polygonal; and the shape
of an inner edge of a cross-section of the accommodating groove of the outer
revolving sleeve is the same as that of an outer edge of a cross-section of the
nut.
Preferably, a guide groove and a guide block, which are fitted with each
other, are formed between the outer revolving sleeve and the inner revolving
bar; the guide groove is arranged vertically; and the guide block is fitted in the
guide groove. Such an arrangement ensures the rotary linkage of the outer
revolving sleeve with the inner revolving bar, and also the vertical fitting of the
outer revolving sleeve with the inner revolving bar in a sliding way.
Preferably, the lifting mechanism comprises a lifting bar; a first lifting
plate, fixed to a guide bar, is fixed at an end of the lifting bar; compression
springs are sheathed on the guide bar, and lower ends of the compression
springs are all supported on a second lifting plate; the second lifting plate is
sheathed on the guide bar and the outer revolving sleeve; a first
outward-protruded ring, extending toward an outer circumferential side, is
formed on the outer revolving sleeve; and the second lifting plate is supported
on an upper side of the first outward-protruded ring. The arrangement of the
compression springs prevents the outer revolving sleeve, during its return to
the original position, from swirling the workpiece up.
Preferably, an upper end of the guide bar is fixed to a third lifting plate, a
lower end of the guide bar is fixed to the first lifting plate, and the third lifting
plate is sheathed on the outer revolving sleeve or the inner revolving bar. With
such an arrangement, the outer revolving sleeve ascends to drive the second
lifting plate to ascend, thereby compressing the compression springs.
Preferably, a second outward-protruded ring, extending toward the outer
circumferential side, is formed on the outer revolving sleeve, and the second
outward-protruded ring is located on a lower side of the first lifting plate; a
sleeve is fixed to the lower side of the first lifting plate, and the sleeve is
sheathed on the outer circumferential side of the outer revolving sleeve; an
inward-protruded ring, extending toward an inner circumferential side, is
formed on the sleeve; the inward-protruded ring is located on a lower side of
the second outward-protruded ring, and the distance from the
inward-protruded ring to the first lifting plate is greater than the thickness of the
second outward-protruded ring. With such an arrangement, the first lifting plate
moves up and down to drive the outer revolving sleeve to move up and down.
Preferably, a torque sensor is connected between the driving device and
the inner revolving bar. By the torque sensor, the torque may be fed back. A
determination about whether the nut is tightened may be made, by controlling
the torque. Before use, first, one nut is tightened to the outer threaded rod of
the workpiece, to determine a range of torque needed when tightening the nut.
Preferably, the lifting mechanism is fixed on the lower side of the
soleplate, and the lifting bar runs through the soleplate upward to extend to the
upper side of the soleplate. With such an arrangement, the tooling of the
present invention is more compact in structure.
Preferably, a fixation groove is fixed to the lower end of the outer
revolving sleeve, a screwdriver bit is fixed detachably in the fixation groove,
and the screwdriver bit has the accommodating groove. Different screwdriver
bits may be used for nuts of different models.
Preferably, a press block, made of elastic material, is fixed to the lower
end of the sleeve, and by the lifting mechanism, the first lifting plate moves
downward so that the press block is pressed against the workpiece. Such an
arrangement avoids the shaking of the workpiece.
The tooling of the present invention can screw nuts to long members.
The production efficiency is improved.
Brief Description of the Drawings
Fig. 1 is a schematic structural diagram of the present invention;
Fig. 2 is a sectional view of the present invention;
Fig. 3 is a schematic structural diagram of the fitting of the outer revolving
sleeve with the inner revolving bar, according to the present invention;
Fig. 4 is a schematic structural diagram of a screwdriver bit, according to
the present invention; and
Fig. 5 is a schematic structural diagram of a nut, according to the present
invention.
Detailed Description of the Invention
The present invention will be further described below with reference to the
accompanying drawings by specific embodiments.
As shown in Figs. 1, 2 and 3, the long-stroke automatic nut-tightening
tooling in the present invention comprises a soleplate 1. A positioning seat 2,
by which a workpiece 3 can be kept always to be vertical, is arranged on the
soleplate 1. A rotary output mechanism is fixed above the positioning seat 2.
The rotary output mechanism comprises a driving device 4, an inner revolving
bar 5 and an outer revolving sleeve 6. The driving device 4 fixed on the upper
side of the soleplate by a bracket 41. The driving device 4 is linked with the
inner revolving bar 5 and used for enabling the inner revolving bar 5 to revolve
on its axis. The outer revolving sleeve 6 is sheathed on and linked with the
inner revolving bar 5, and the outer revolving sleeve 6 is fitted on the inner
revolving bar 5 in a sliding way. The outer revolving sleeve 6 is equipped with a
lifting mechanism 11 by which the outer revolving sleeve 6 can move up and
down. An accommodating groove 60 for accommodating part or all of nuts 12
is formed at a lower end of the outer revolving sleeve 6. Linkage structures,
which are fitted with each other, are formed between an inner circumferential
wall of the accommodating groove 60 and an outer circumferential wall of a nut
12. When a workpiece 3 is positioned and fixed in the positioning seat 2, the
workpiece 3 is coaxial to the outer revolving sleeve 6 and the inner revolving
bar 5.A torque sensor 42 is connected between the driving device 4 and the
inner revolving bar 5. The driving device 4 is a servo motor. The lifting
mechanism 11 is a lifting cylinder.
A fixation groove is fixed to the lower end of the outer revolving sleeve 6,
a screwdriver bit 68 is fixed detachably in the fixation groove, and the
screwdriver bit 68 has the accommodating groove 60.A press block 78, made
of elastic material, is fixed to the lower end of the sleeve 76, and by the lifting
mechanism 11, the first lifting plate 71 moves downward so that the press
block 78 is pressed against a portion, deviated from the outer threaded rod, of
the workpiece 3.
As shown in Figs. 4 and 5, the linkage structure comprises a driving
plane 601 on the inner circumferential wall of the accommodating groove 60
and a stressed plane 121 on the outer circumferential wall of the nut 12, and
the outer revolving sleeve 6 revolves on its axis so that the driving plane 601 is
pressed against the stressed plane 121 of the nut 12; the outer circumferential
wall of the nut 12 is regular polygonal; and the shape of an inner edge of a
cross-section of the accommodating groove 60 of the outer revolving sleeve 6
is the same as that of an outer edge of a cross-section of the nut 12.
As shown in Figs. 1-3, a guide groove 50 and a guide block 61, which are
fitted with each other, are formed between the outer revolving sleeve 6 and the
inner revolving bar 5; the guide groove 50 is arranged vertically; and the guide
block 61 is fitted in the guide groove 50.A number of guide blocks 61 are
arranged on the inner circumferential wall of the outer revolving sleeve 6, and
a number of guide grooves 50 are arranged on the inner revolving bar 5.
The lifting mechanism 11 comprises a lifting bar 13; a first lifting plate 71,
fixed to a guide bar 72, is fixed at an end of the lifting bar 13; compression
springs 73 are sheathed on the guide bar 72, and lower ends of the
compression springs 73 are all supported on a second lifting plate 74; the
second lifting plate 74 is sheathed on the guide bar 72 and the outer revolving
sleeve 6; a first outward-protruded ring 62, extending toward an outer
circumferential side, is formed on the outer revolving sleeve 6; and the second
lifting plate 74 is supported on an upper side of the first outward-protruded ring
62. The upper end of the guide bar 72 is fixed to the third lifting plate 75, the
lower end of the guide bar 72 is fixed to the first lifting plate 71, and the third
lifting plate 75 is sheathed on the inner revolving bar 5. The lifting mechanism
11 is fixed on the lower side of the soleplate 1, and the lifting bar 13 runs
through the soleplate 1 upward to extend to the upper side of the soleplate 1.
A second outward-protruded ring 63, extending toward the outer
circumferential side, is formed on the outer revolving sleeve 6, and the second
outward-protruded ring 63 is located on a lower side of the first lifting plate 71;
a sleeve 76 is fixed to the lower side of the first lifting plate 71, and the sleeve
76 is sheathed on the outer circumferential side of the outer revolving sleeve 6;
an inward-protruded ring 77, extending toward an inner circumferential side, is
formed on the sleeve 76; the inward-protruded ring 77 is located on a lower
side of the second outward-protruded ring 63, and the distance from the
inward-protruded ring 77 to the first lifting plate 71 is greater than the thickness
of the second outward-protruded ring 63.
Claims (9)
1. Long-stroke automatic nut-tightening tooling, characterized in that the tooling comprises a soleplate; a positioning seat, by which a workpiece can be kept always to be vertical, is arranged on the soleplate; a rotary output mechanism is fixed above the positioning seat; the rotary output mechanism comprises a driving device, an inner revolving bar and an outer revolving sleeve; the driving device is linked with the inner revolving bar and used for enabling the inner revolving bar to revolve on its axis; the outer revolving sleeve is sheathed on and linked with the inner revolving bar, and the outer revolving sleeve is fitted on the inner revolving bar in a sliding way; the outer revolving sleeve is equipped with a lifting mechanism by which the outer revolving sleeve can move up and down; an accommodating groove for accommodating a part or all of nuts is formed at a lower end of the outer revolving sleeve; linkage structures, which are fitted with each other, are formed between an inner circumferential wall of the accommodating groove and an outer circumferential wall of a nut; and when a workpiece is positioned and fixed in the positioning seat, the workpiece is coaxial to the outer revolving sleeve and the inner revolving bar, the lifting mechanism comprises a lifting bar; a first lifting plate, fixed to a guide bar, is fixed at an end of the lifting bar; compression springs are sheathed on the guide bar, and lower ends of the compression springs are all supported on a second lifting plate; the second lifting plate is sheathed on the guide bar and the outer revolving sleeve; a first outward-protruded ring, extending toward an outer circumferential side, is formed on the outer revolving sleeve; and the second lifting plate is supported on an upper side of the first outward-protruded ring, wherein a second outward- protruded ring, extending toward the outer circumferential side, is formed on the outer revolving sleeve, and the second outward-protruded ring is located on a lower side of the first lifting plate.
2. The long-stroke automatic nut-tightening tooling according to claim 1, characterized in that the linkage structure comprises a driving plane on the inner circumferential wall of the accommodating groove and a stressed plane on the outer circumferential wall of the nut, and the outer revolving sleeve revolves on its axis so that the driving plane is pressed against the stressed plane of the nut; the outer circumferential wall of the nut is regular polygonal; and the shape of an inner edge of a cross-section of the accommodating groove of the outer revolving sleeve is the same as that of an outer edge of a cross-section of the nut.
3. The long-stroke automatic nut-tightening tooling according to claim 1, characterized in that a guide groove and a guide block, which are fitted with each other, are formed between the outer revolving sleeve and the inner revolving bar; the guide groove is arranged vertically; and the guide block is fitted in the guide groove.
4. The long-stroke automatic nut-tightening tooling according to claim 1, characterized in that an upper end of the guide bar is fixed to a third lifting plate, a lower end of the guide bar is fixed to the first lifting plate, and the third lifting plate is sheathed on the outer revolving sleeve or the inner revolving bar.
5. The long-stroke automatic nut-tightening tooling according to claim 1, characterized in that a sleeve is fixed to the lower side of the first lifting plate, and the sleeve is sheathed on the outer circumferential side of the outer revolving sleeve; an inward-protruded ring, extending toward an inner circumferential side, is formed on the sleeve; the inward-protruded ring is located on a lower side of the second outward-protruded ring, and the distance from the inward-protruded ring to the first lifting plate is greater than the thickness of the second outward- protruded ring.
6. The long-stroke automatic nut-tightening tooling according to claim 1, characterized in that a torque sensor is connected between the driving device and the inner revolving bar.
7. The long-stroke automatic nut-tightening tooling according to claim 1, characterized in that the lifting mechanism is fixed on the lower side of the soleplate, and the lifting bar runs through the soleplate upward to extend to the upper side of the soleplate.
8. The long-stroke automatic nut-tightening tooling according to claim 1, characterized in that a fixation groove is fixed to the lower end of the outer revolving sleeve, a screwdriver bit is fixed detachably in the fixation groove, and the screwdriver bit has the accommodating groove.
9. The long-stroke automatic nut-tightening tooling according to claim 5, characterized in that a press block, made of elastic material, is fixed to the lower end of the sleeve, and by the lifting mechanism, the first lifting plate moves downward so that the press block is pressed against the workpiece.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910615168.6 | 2019-07-09 | ||
| CN201910615168.6A CN110238638B (en) | 2019-07-09 | 2019-07-09 | Long-stroke automatic nut screwing tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| NZ759256A NZ759256A (en) | 2021-02-26 |
| NZ759256B2 true NZ759256B2 (en) | 2021-05-27 |
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