JP3269769B2 - Retaining device for slewing bearing fixing bolt of construction machine and transport structure of slewing bearing - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a casing dry
Holder for slewing bearing fixing bolts of construction equipment
And transport structure of slewing bearing .

[0002]

2. Description of the Related Art For example, like a casing driver,
When the weight or size of a large construction machine increases, it is divided into components for transportation and assembled on site using a crane. In the case of a casing driver, for example, it is disassembled and transported into a base frame, an elevating frame that is raised and lowered by a hydraulic cylinder along the base frame, and an upper structure fixed on the base frame with bolts. The upper structure is composed of a rotating ring and a band device for holding a casing mounted on the rotating ring, and a swivel bearing between the rotating ring and the lifting frame is mounted on the lifting frame side or the rotating ring side. transport. If the casing driver becomes larger, the components may be disassembled and transported by further traversing or traversing the components.

[0003]

As described above, at the site, the upper structure is lifted up by a crane and mounted on an elevating frame, and is assembled. However, when the portion above the slewing bearing is separated from the elevating frame and transported, At the site, it is necessary to suspend the slewing bearing on the lifting frame by a crane and fix it by bolts. In this case, with the rotating ring fastened to the slewing bearing,
Even if a bolt for fixing the fixed wheel of the slewing bearing to the mounting seat on the elevating frame is to be removed and inserted at the site, the rotating ring fixed on the slewing wheel covers the upper surface of the fixed wheel (to reduce the size). In order to achieve this, it is necessary to adopt such a structure), so the rotating ring hinders the insertion and removal of bolts from the bolt holes of the fixed ring, so take out the bolts stored elsewhere at the site Slewing bearings cannot be installed.

Therefore, as long as the rotating ring is fixed on the slewing bearing and transported, and the casing driver is assembled on site, the bolt is inserted through the bolt hole of the fixed wheel, that is, the bolt is inserted from the lower surface of the fixed wheel. Must be transported with the threaded portion of the frame protruding, suspended on the mounting seat of the lifting frame at the site, and fixed with the bolts.

However, if the bolt is held on the fixed wheel and is mounted on the elevating frame, the screw portion of the bolt collides with the mounting seat of the elevating frame, and the screw portion is damaged, so that the bolt cannot be screwed in. There is.

In order to avoid such damage to the screw portion of the bolt, the bolt is removed from the fixed ring and transported with the upper rotating ring obstructing the insertion and removal of the bolt removed. After mounting the bearing, insert the bolt into the bolt hole of the fixed wheel and fix it, and then fix the rotating ring on the revolving wheel.Since the number of bolts is large, a large space for storing bolts is required There is a risk of loss and management becomes complicated.

SUMMARY OF THE INVENTION In view of the above problems, the present invention provides an apparatus for fastening a fixed wheel of a slewing bearing to a mounting member by using a bolt, wherein the fixed wheel can hold the bolt. Slewing bearing for construction machinery that does not have the risk of damaging the thread of the bolt when mounted on
An object of the present invention is to provide a holding device for a fixed bolt and a transport structure for a slewing bearing .

[0008]

The turning of a construction machine according to claim 1 is performed.
The rotating bearing holding bolt holding device is a swing bearing
The fixing ring of the bracket is attached to the mounting portion by bolts penetrating the fixing ring.
Used for construction machinery to fix to the material, before the bolt
In a state of solving the conclusion of serial fixed ring, between the mounting member and the under head of the bolt, the said bolt upon fastening
By and having a screw-in depth than the thickness of the mounting member side is fitted freely disconnect the retaining member which is open, it was inserted part of the threaded portion of the bolt to the fixed ring
While holding the bolt on the fixed wheel in the state as it is ,
The bolt was held on the fixed wheel by the holding member
In the state, the insertion depth of the bolt into the fixed ring
And the head of the bolt and the slewing ring of the slewing bearing
The distance between the rotating ring fixed to
It is characterized by having been set well.

A slewing bearing for a construction machine according to claim 2 is fixed.
2. The holding member according to claim 1, wherein
Is made of elastic material and the holding member is
The width of the side opening of the use made smaller than the bolt shaft diameter
It is characterized by.

[0010] A slewing bearing fixed to a construction machine according to claim 3.
The holding device for the bolt for
Construction to fix to the mounting member with bolts penetrating the fixed wheel
Used in a machine to fasten the fixed wheel with the bolt
In the unfastened state, between the bottom of the bolt and the mounting member
The screw of the bolt to the mounting member at the time of fastening
Holder with thickness greater than or equal to the insertion depth and with open side surfaces
By inserting and removing the material freely, the bolt
With a part of the screw part inserted into the fixed ring,
And the holding member is permanently
It is characterized by consisting of a permanent magnet .

[0011] A slewing bearing for a construction machine according to claim 4 is transferred.
The construction according to any one of claims 1 to 3, wherein the transmission structure is
It has a holding device for bolts for fixing the slewing bearing of the machine,
The turning is performed while the rotating ring is fixed to the turning wheel.
It is characterized by transporting bearings .

[0012]

According to the first aspect of the present invention, the fastening between the fixing wheel and the mounting member by the bolt is released, and the head of the bolt is separated from the fixing wheel while the bolt is inserted through the bolt hole of the fixing wheel , and the bolt is fixed below the neck of the bolt. by fitting the retaining member between the wheels, bolt solid in a state in which the threaded portion of the bolt does not protrude from the stationary ring
It is held on a constant wheel . When fixing the fixed wheel to the mounting member with a bolt, the holding member is removed from the bolt and screwed into a screw hole of the mounting member.

According to the second aspect of the present invention, since the elastic member is used as the holding member, the holding member is elastically fitted to the bolt, there is no possibility of being detached, and the holding member can be easily attached and detached.

In the third aspect, the holding member is a permanent member.
By using a magnet, the bolt is magnetically attracted,
There is no risk of coming off.

According to the fourth aspect, the rotation of the slewing bearing is provided.
With the rotating ring fixed to the rotating ring and the bolt screw
The part is transported without protruding from the fixed wheel.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1A is an enlarged sectional view taken along the line EE of FIG. 2 showing an example of a slewing bearing to which the holding device of the present invention is applied, and FIG. 1C is a cross-sectional view showing a bolt and a holding member of FIG. 1B, and FIGS. 2 and 3 are plan views of a casing driver which is an example of a machine to which the present invention is applied. It is a figure and a side view.

First, a casing driver which is an application example of the bolt holding device according to the present invention will be described with reference to FIGS. The casing driver 1 includes a base frame 3 horizontally held by jacks 2 at four corners,
The base frame 3 has vertical guide frames 3a to 3 at four corners.
It has a square frame shape having d. Reference numeral 4 denotes an elevating frame mounted so as to be able to move up and down along the vertical guide frames 3a to 3d. The elevating frame 4 includes a plurality of thrust cylinders mounted between the base frame 3 and the elevating frame 4. 5 to move up and down.

A rotary ring 7 is mounted on the lifting frame 4 via a swivel bearing 6. As shown in FIG. 1A, on the inner peripheral side of the upper surface of the lifting frame 4,
A mounting seat (mounting member) 4a of the slewing bearing 6 is fixed, and an inner ring 6a, which is a fixed wheel of the slewing bearing 6, is fixed to the upper surface of the mounting seat 4a by a bolt 9. An outer wheel 6b, which is a slewing wheel of the slewing bearing 6, has an external gear 6c and meshes with an output gear (not shown) of a hydraulic motor 10 attached to the elevating frame 4 shown in FIGS. The rotation of 10 causes the outer ring 6b to rotate. FIG.
As shown in (A) and (B), the rotating ring 7 is fixed on the outer ring 6b by bolts 12 and attached.

As shown in FIGS. 2 and 3, a band device 14 for holding the casing 13 is mounted on the rotating ring 7. The band device 14 includes a substantially semicircular fixed band 14 a fixed to the rotating ring 7 and the fixed band 1.
4a, and a pair of movable bands 14b, 14c attached to the ends of the movable bands 14b, 14c so as to be freely opened and closed about pivot shafts 15, 16;
And a hydraulic band cylinder 14d for opening and closing the band, which is connected and attached by 7, 18.

Each of the guide frames 3a to 3d has two guide surfaces a and b. One guide surface a is a surface that receives a rotational reaction force, and is provided so as to be substantially perpendicular to the tangential direction of the rotating circle of the rotating ring 7. The other guide surface b suppresses horizontal fluctuation of the lifting frame 4 and stably supports the same. The lifting frame 4 has a surface that slides on each of the surfaces a and b of the guide frames 3a to 3d.

Next, the holding device of the present invention will be described with reference to FIG. In a state where the casing driver is assembled, as shown in FIG. 1A, an inner ring 6a which is a fixed ring of the slewing bearing 6 is provided in a screw hole 19 provided in a mounting seat 4a fixed on the elevating frame 4 by welding. Bolt holes 20
Is screwed downward, whereby the swing bearing 6 is fixed to the lifting frame 4.

A screw hole 22 provided in the rotary ring 7
Then, the bolt 12 inserted into the bolt hole 23 of the outer ring 6b is screwed into the outer ring 6b, which is the turning ring of the turning bearing 6, so that the rotating ring 7 is fixed to the outer ring 6b. Reference numerals 24 and 25 denote flat seats passing through the bolts 9 and 12, respectively, and reference numerals 26 and 27 denote holes provided in the elevating frame 4 and the rotating ring 7 so as to communicate with the screw holes 19 and 22, respectively. Serves to bleed air when bolts are fastened, and the hole 26 located at the bottom of the screw hole 19 also serves to drain water.

Immediately above the bolt 9 for fixing the inner ring 6a to the mounting seat 4a, a part of the rotating ring 7 is provided.
Is longer than the distance d between the inner ring 6a and the rotating ring 7. For this reason, the bolt 9 cannot be removed unless the bolt 12 that fixes the rotating ring 7 to the outer ring 6b is removed.
When the inner ring 6a is attached to the mounting seat 4a with the bolt 9, the length e of the screw portion of the bolt 12 in the rotating ring 7 is shorter than the distance f between the bolt 12 below the bolt 12 and the lifting frame 4. Therefore, when the inner ring 6a is fixed to the mounting seat 4a with the bolt 9, the bolt 12 can be removed from the rotating ring 7 and the rotating ring 7 can be removed from the slewing bearing 6, that is, the outer ring 6b.

Therefore, the rotating ring 7 is connected to the slewing bearing 6.
, The inner ring 6a, that is, the swivel bearing 6, can be removed from the mounting seat 4a. However, in the case of the slewing bearing 6, the number of bolts 9 and 12 is large, and it is necessary to secure a wide space as a storage space after the bolt 9 is removed from the inner ring 6a. In addition, in order to remove the bolt 9, the rotating ring 7 which does not need to be removed and the slewing bearing 6 must be separated from each other.

Therefore, in the present invention, as shown in FIG. 1B, when the swing bearing 6 and the rotating ring 7 are transported separately from the lifting frame 4, the inner ring 6 a is stored in the storage space of the bolt 9. So that it can be used as
The holding member 30 is attached between the lower part of the neck of the bolt 9 and the inner ring 6a, thereby holding the bolt 9 so that the screw portion of the bolt 9 does not project downward from the inner ring 6a.

As shown in FIG. 1C, the holding member 30 is made of an elastic material such as rubber (a ring made of a steel material having a spring action may be used), and has a ring shape.
An opening 31 for inserting and removing the bolt 9 is provided on the side surface, and the holding member 30 is fitted through the opening 31 from the side surface of the bolt 9. Here, assuming that the width of the opening 31 is g, the width g is smaller than the shaft diameter D of the bolt 9. As a result, the holding member 30 is not detached from the bolt 9 by the locking portions 30a on both sides of the opening 31 having the locking width of (Dg) ÷ 2. In addition, a chamfered portion 30b is provided on the outer peripheral portion of the opening 31 of the holding member 30 so that the holding member 30 can be easily fitted to the bolt 9.

Further, the thickness h of the holding member 30 is as shown in FIG.
As shown in (A), the length of the screw portion of the bolt 9 protruding from the inner ring 6a in the fastening state with the bolt 9, that is, the screwing depth i at which the bolt 9 is screwed into the screw hole 19 of the mounting seat 4a is set to be greater than or equal to. Further, the bolt j is inserted into the bolt hole 20 of the inner ring 6a from the distance j between the bolt 9 and the rotary ring 7 immediately above the bolt 9 in a state where the holding member 30 is attached to the bolt 9.
Is longer than the length k.

Next, the operation of the present embodiment will be described. As shown in FIG. 1A, in the assembled state, the inner race 6a
Are fixed to the mounting seat 4a by bolts 9 and the outer race 6b
The rotary ring 7 is fixed to the rotary ring 7 by bolts 12. When removing the portion above the slewing bearing 6 from the lifting frame 4 for transportation or the like, the bolt 9 is loosened while the rotating ring 7 is fixed to the outer ring 6 b with the bolt 12, and the mounting seat 4 is removed.
Release the screw connection with a. As described above, the structure for separating and transporting a part or all of the portion of the slewing bearing 6 or more from the elevating frame 4 is such that the mounting seat 4a is divided as shown by a two-dot chain line 32 in FIGS. By transporting the lifting frame 4 separately, it is necessary to cope with the enlargement of the opening of the lifting frame 4 so that the transport can be divided, and this is indispensable when responding to an increase in the size of the casing driver. The structure for separately transporting the slewing bearing 6 or more with respect to the frame 4 is applied even when the lifting frame 4 is not divided.

After the bolt 9 is loosened and the fastening with the mounting seat 4a is released, the bolt 9 is lifted upward, and a holding member is fitted from below the neck of the bolt 9 and the flat seat 24 through the opening 31. . At this time, since the holding member 30 is made of an elastic material and the chamfered portions 30b are provided on both sides of the opening 31, when the holding member 30 is pressed into the bolt 9 from the opening 31, the locking portion 30a is formed. The gap is easily expanded from the opening width g to the diameter D of the bolt 9 and passes through the shaft of the bolt 9.

Further, from the depth i of the bolt 9 screwed into the screw hole 19 in the fastened state shown in FIG.
Since the thickness h of 0 is thicker or the same, FIG.
As shown in (B), when the holding member 30 is attached to the bolt 9, the screw portion of the bolt 9 does not project from the lower surface of the inner ring 6a.

Further, from the distance j between the bolt 9 and the rotary ring 7 immediately above the bolt 9 in a state where the holding member 30 is attached to the bolt 9, the length k of the bolt k inserted into the bolt hole 20 of the inner ring 6a is k. Since it is longer, the bolt 9 does not come off from the inner ring 6a.

As a result, the bolt 9 can be stored while being attached to the slewing bearing 6, and when a portion above the slewing bearing 6 is suspended on the lifting frame 4 by a crane and fixed to the mounting seat 4a by the bolt 9, Bolt 9
There is no possibility that the threaded portion of this will collide with the mounting seat 4a or the like and be damaged.

When the mounting seat 4a and the slewing bearing 6 are separated from each other, the holding member 30 is mounted to
Since the screw portion of the bolt 9 does not protrude from the lower surface of the slewing bearing 6, the screw portion can be protected.
a can also serve as a storage location for the bolt 9.

In general, since the components of the slewing bearing 6 and the lifting frame 4 are made of ferromagnetic steel, a permanent magnet can be used as the holding member 30. If such a material is used, the bolt can be used. 9 has a function of preventing the bolt 9 from coming out of the bolt hole 20.
Even if the holding member 30 does not have the dimensional relationship of k,
Can be prevented from falling off. In addition, if the permanent magnet and the elastic material are combined, the holding member 30 can be more securely fixed to the bolt 9. Further, the holding member 30
In addition, not only one holding member 30 may be provided for each bolt 9, but a plurality of bolts may be held by one holding member.

The present invention can be applied not only to the slewing bearing of the casing driver but also to other construction machines or industrial machines, where the components need to be disassembled and assembled for transportation, maintenance and inspection.

[0036]

According to the first aspect of the present invention, the bolt is fixed under the neck.
Attachment member of the screw part of the bolt at the time of fastening between the ring
A bolt having a thickness equal to or greater than the screw-in depth into the bolt and having a side surface opened can be freely inserted and removed, so that the bolt is held on the workpiece without the screw portion of the bolt protruding from the fixed ring . Therefore, the screw portion of the bolt can be protected. Also, when holding the bolt,
Adjust the distance between the rotating ring and the bolt
Is shorter than the insertion depth of the
There is no risk of falling out.

In the bolt holding state, the fixed wheel
Since the screw portion of the bolt is housed, there is no need to separately provide a bolt housing space. Further, since the bolt is not separated from the fixed ring , there is no risk of loss and the management becomes easy.

According to the second aspect , the holding member is made of an elastic material, and the width of the side opening for inserting and removing the holding member to and from the bolt is smaller than the shaft diameter of the bolt. There is no danger.

According to the third aspect, a permanent magnet is used as the holding member.
By using stone, the bolts are
There is no danger.

According to the fourth aspect, the swing of the swing bearing is performed.
While the rotating ring is fixed to the wheel,
Can be transported without protruding from the fixed wheel.
You.

[Brief description of the drawings]

1A is an enlarged cross-sectional view taken along the line EE of FIG. 2 showing a structure around a slewing bearing in a casing which is an example of an object to which a bolt holding device of the present invention is applied, and FIG. 1B is a bolt holding device of the present invention. FIG. 2C is a cross-sectional view showing an embodiment of the device, and FIG. 2C is a cross-sectional view of the holding member of the embodiment.

FIG. 2 is a plan view of a casing driver that is an example of an application target of the present invention.

FIG. 3 is a side view of the casing driver of FIG. 2;

[Explanation of symbols]

1: casing driver, 2: jack, 3: base frame, 4: elevating frame, 4a: mounting seat (mounting member), 5: thrust cylinder, 6: slewing bearing, 6
a: inner ring ( fixed wheel ), 6b: outer ring (slewing wheel) , 7: rotating ring, 9, 12: bolt, 13: casing, 14:
Band device, 19, 22: screw hole, 20, 23: bolt hole, 24, 25: flat seat, 30: holding member, 30a: locking portion, 31: opening, c: bolt length, h: holding member 30 , G: width of the opening 31, i: screw-in depth of the bolt 9, j: interval between the bolt 9 and the rotating ring 7, k: insertion depth of the bolt 9 in a holding state

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) F16B 41/00-43/00 E02F 9/12

Claims (4)

(57) [Claims] (1)Insert the fixed wheel of the slewing bearing through the fixed wheel.
Used for construction machinery that is fixed to the mounting member with bolts
And Of the fixed ring by the bolt Unfastened, before
Between the bottom of the bolt and the mounting member
ToSaidBolt ofScrew depth to the mounting memberMore thickness
Can be easily inserted and removed
By fitting toSaidBolt threadPart of the front
As it is inserted into the fixed wheelBolts in stateThe fixed wheelTo
KeepAlong with The bolt was held on the fixed wheel by the holding member
In the state, the insertion depth of the bolt into the fixed ring
And the head of the bolt and the slewing ring of the slewing bearing
The distance between the rotating ring fixed to
Set well Characterized bySlewing bearing for construction machinery
For fixingBolt holding device. 2. A swing bearing for a construction machine according to claim 1.
In the holding device of the bolt for fixing The holding member is made of an elastic material, and a bolt of the holding member
The width of the side opening for inserting / removing into / from the bolt is smaller than the shaft diameter of the bolt.
Crushed Slewing bearing for construction machinery
Holding device for fixed bolts. 3. A fixed ring of a slewing bearing extends through the fixed ring.
Used for construction machinery that is fixed to the mounting member with bolts
And In the state where the fixed ring is loosened by the bolt,
Between the bottom of the bolt and the mounting member
Thickness greater than the screwing depth of the bolt into the mounting member
Can be easily inserted and removed
By fitting a part of the screw part of the bolt to the front.
With the bolt still inserted into the fixed wheel,
While holding The holding member is made of a permanent magnet Construction characterized by that
A device for holding bolts for fixing slewing bearings on machines. 4. A building according to any one of claims 1 to 3.
Equipped with a holding device for bolts to fix the slewing bearing of
And The turning is performed while the rotating ring is fixed to the turning wheel.
Transport bearings Turning construction machinery characterized by the following:
Bearing transport structure.