JP2010222938A - Slewing type construction machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve workability when a turning wheel, a turning frame, and a pinion driving device are assembled. <P>SOLUTION: A first knock pin 16 and a second knock pin 17 are projected and provided to an outer wheel 7B of the turning wheel 7, and the first knock pin 16 and the second knock pin 17 are respectively inserted to and engaged with a first pin hole 18 on the frame side and a second pin hole 19 on the frame side which are provided in the turning frame 5. Because of this, positioning of the turning frame 5 with respect to the turning wheel 7 is performed. The pinion driving device 10 is positioned with respect to the turning frame 5 by insertion of the tip side of the first knock pin 16 into the first pin hole 21 for engagement on the pinion side. The first knock pin 16 is projected from the first pin hole 18 on the frame side, and the first pin hole 21 on the pinion side is provided in a housing 12 of the pinion driving device 10. Because of this, the three members, namely the turning wheel 7, the turning frame 5, and the pinion driving device 10 can be positioned simultaneously by using the first knock pin 16. Thus, workability can be increased when these three members are assembled with each other. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a swivel construction machine in which a swivel body is turnably mounted on a base such as a hydraulic excavator or a hydraulic crane.

  In general, a hydraulic excavator as a typical example of a swivel construction machine includes a self-propelled lower traveling body having a round body, an upper revolving body that is turnably mounted on the lower traveling body, a lower traveling body, and an upper A revolving device provided between the revolving unit is provided, and a working device for performing excavation work such as earth and sand is provided on the front side of the upper revolving unit so as to be able to move up and down.

  The turning device provided between the lower traveling body and the upper turning body includes a turning wheel that supports the lower turning body so that the upper turning body can turn, and a pinion driving device described later. The upper swing body is swung with respect to the body.

  Here, the turning wheels constituting the turning device are normally used with an inner ring that is attached to a round body provided on the lower traveling body using bolts, and a bolt that is disposed on the outer peripheral side of the inner ring and is used for a turning frame of the upper turning body. The outer ring is attached to the outer ring, and a plurality of rolling elements are provided between the inner ring and the outer ring so as to be capable of rolling. Inner teeth are formed on the inner circumference side of the inner ring over the entire circumference.

  On the other hand, a pinion drive device having a pinion that meshes with the inner teeth of the inner ring is attached to the swing frame that is the base of the upper swing body, and the pinion that is rotationally driven by the pinion drive device meshes with the inner teeth of the inner ring. While revolving along the inner ring. The revolving force of the pinion is transmitted to the turning frame via the pinion driving device, so that the turning frame turns on the lower traveling body.

  By the way, when assembling the turning frame to the lower traveling body of the hydraulic excavator, first, the inner ring of the turning wheel is fastened using a bolt on the round body of the lower traveling body, and then the turning frame lifted using a crane or the like is turned. Lower on the outer ring of the wheel and fasten the turning frame with bolts on the outer ring of the turning wheel. Then, the housing of the pinion driving device is attached to the upper surface side of the turning frame, and the pinion protruding downward from the housing of the pinion driving device is engaged with the internal teeth formed on the inner ring of the turning wheel.

  In this case, when assembling the turning frame described above, the turning frame is lifted using a crane or the like, and when the turning frame is lowered onto the outer ring of the turning wheel, the positioning of the turning frame with respect to the outer ring of the turning wheel, that is, the outer ring By positioning the plurality of bolt insertion holes formed in the plurality of bolt holes and the plurality of bolt holes (female screw holes) formed in the turning frame, the workability when the outer ring and the turning frame are fastened with the bolts is improved. Can do.

  When the pinion drive device is mounted on the upper surface side of the swing frame, the pinion drive device (housing) is positioned with respect to the swing frame, that is, a plurality of bolt holes (female screw holes) formed in the swing frame, and the housing of the pinion drive device By positioning with a plurality of bolt insertion holes formed on the pinion drive device, the workability when fastening the pinion drive device to the turning frame with bolts is improved, and the pinion of the pinion drive device is provided on the inner ring of the turning wheel It is possible to properly mesh with the internal teeth.

  For this reason, in the prior art, when a knock pin protrudes from the outer ring of the turning wheel and a pin hole is provided in the turning frame, and the turning frame lifted by using a crane or the like is lowered onto the outer ring of the turning wheel, By inserting a knock pin on the outer ring side into the pin hole, the turning frame can be positioned with respect to the outer ring of the turning ring.

  Further, another knock pin is provided on the upper surface side of the swivel frame, and a pin hole is provided in the housing of the pinion drive device. When the pinion drive device is mounted on the swivel frame, the pin hole on the pinion drive device (housing) side is provided. The pinion drive device is positioned with respect to the swivel frame by being inserted into another knock pin on the swivel frame side (see Patent Document 1).

JP 2004-346484 A

  However, in the above-described prior art, when the swivel frame is fastened to the outer ring using a bolt with the knock pin provided on the outer ring of the swivel wheel being inserted into the pin hole of the swivel frame, the bolt and the bolt of the swivel frame are used. The turning frame may move around the knock pin within the range of the gap generated between the insertion hole and the mounting position of the turning frame with respect to the outer ring causes an error.

  Similarly, when the pinion drive device is fastened to the swing frame using a bolt with another knock pin provided on the swing frame inserted into the pin hole of the pinion drive mechanism (housing), the bolt and The pinion drive device may move around another knock pin within the range of the clearance between the pinion drive device and the bolt insertion hole, and this causes an error in the mounting position of the pinion drive device relative to the swivel frame. It will be.

  Thus, in the above-described prior art, the turning wheel and the turning frame are positioned by the knock pin provided on the outer ring of the turning wheel, and the turning frame and the pinion drive device are positioned by the other knock pin provided on the turning frame. Is done. For this reason, the inner teeth provided on the inner ring of the turning wheel and the pinion of the pinion driving device are indirectly positioned via the turning frame, and the position of the pinion with respect to the inner teeth formed on the inner ring is It changes by superimposing the error of the mounting position of the turning frame with respect to the outer ring and the error of the mounting position of the pinion drive device with respect to the turning frame.

  As a result, a large backlash may occur at the meshing portion between the internal teeth formed on the inner ring and the pinion of the pinion driving device, and when the upper swing body performs a swing operation due to the large backlash, There is a problem that the smooth turning operation of the upper turning body is impaired and the working accuracy of the working device is lowered.

  The present invention has been made in view of the above-described problems of the prior art, and can improve workability when assembling the swivel wheel, the swivel frame, and the pinion drive device, and the internal teeth of the swivel wheel and the pinion drive device. An object of the present invention is to provide a swivel construction machine that can properly mesh with a pinion.

  In order to solve the above-described problems, the present invention provides a base having a round cylinder, a revolving body having a revolving frame that forms a support structure and mounted on the base so as to be turnable, and a space between the base and the revolving body. A swiveling device that swivels the swiveling body with respect to the base body, and the swiveling device has an inner ring formed on the inner peripheral side and attached to the round body of the base body, and an outer ring side of the inner ring. A turning construction machine comprising a turning wheel comprising an outer ring provided via a rolling element and attached to a turning frame of the turning body, and a pinion driving device for rotationally driving a pinion meshing with an inner tooth of the inner ring Applies to

  A feature of the configuration adopted by the invention of claim 1 is that the outer ring of the swivel wheel has a first knock pin and a second knock pin that are located at an attachment portion with the swivel frame and project to the swivel frame side. The first frame side pin hole into which the first knock pin is inserted and the second knock pin are inserted into the revolving frame, which is located at the attachment portion with the outer ring. A second frame-side pin hole is provided, and the pinion driving device is fitted with the first knock pin protruding from the first frame-side pin hole located at an attachment portion with the turning frame. The first pinion side pin hole is provided.

  According to a second aspect of the present invention, the pinion driving device is provided with a third knock pin that is located at an attachment portion with the turning frame and protrudes toward the turning frame, and the turning frame includes the pinion driving device and the pinion driving device. The third frame-side pin hole into which the third knock pin is inserted is provided in the mounting portion.

  According to a third aspect of the present invention, the swivel frame is provided with a third knock pin that is located at an attachment portion with the pinion drive device and protrudes toward the pinion drive device, and the pinion drive device includes the swivel frame. The second pinion-side pin hole into which the third knock pin is inserted is provided in the mounting portion.

  According to a fourth aspect of the present invention, the pinion drive device includes a housing having a mounting flange on the lower end side, a rotation source provided on the upper end side of the housing, and a rotation source provided in the housing for decelerating the rotation of the rotation source. The speed reduction mechanism and the pinion that is rotatably supported by the housing and outputs the rotation reduced by the speed reduction mechanism, and the mounting portion of the turning frame provided in the pinion drive device, There is a mounting flange.

  According to the first aspect of the present invention, the first and second knock pins provided on the outer ring of the turning wheel are inserted into the first and second frame side pin holes provided on the turning frame, thereby The turning frame can be positioned at two locations with respect to the outer ring, and both can be fastened using bolts or the like with the turning frame accurately positioned with respect to the turning wheel.

  At this time, by inserting the first pinion side pin hole provided in the pinion driving device into the first knock pin protruding from the first frame side pin hole, the turning wheel, the turning frame, and the pinion driving device These three members can be simultaneously positioned using one common first knock pin. As a result, it is possible to improve workability when the turning wheel, the turning frame, and the pinion driving device are assembled to each other.

  In addition, since the internal teeth provided on the inner ring of the turning wheel and the pinion of the pinion drive device can be directly positioned with reference to the first knock pin, the internal teeth of the inner ring and the pinion can be appropriately backlashed. It can be meshed properly in the secured state. As a result, when the turning device is operated, the inner teeth of the turning wheel and the pinion of the pinion driving device mesh with each other with an appropriate backlash, so that the turning body can perform a smooth turning operation with respect to the base body. The accuracy of work using construction machines can be improved.

  According to the invention of claim 2, when the pinion drive device is assembled to the swing frame, the first pinion of the pinion drive device is connected to the first knock pin protruding from the first frame side pin hole of the swing frame. While inserting a side pin hole, the 3rd knock pin provided in the pinion drive device can be inserted in the 3rd frame side pin hole provided in the turning frame. Thereby, the pinion driving device can be positioned at two positions with respect to the turning frame, and both can be fastened with bolts or the like in a state where the pinion driving device is accurately positioned with respect to the turning frame.

  According to the invention of claim 3, the first pinion of the pinion driving device is attached to the first knock pin protruding from the first frame side pin hole of the turning frame when the pinion driving device is assembled to the turning frame. While inserting a side pin hole, the 3rd knock pin provided in the turning frame can be inserted in the 2nd pinion side pin hole provided in the pinion drive device. Thereby, both can be fastened with a volt | bolt etc. in the state which positioned the pinion drive device correctly with respect to the turning frame.

  According to invention of Claim 4, since the mounting flange of the housing which comprises a pinion drive device becomes an attachment part with a turning frame, the 1st, 2nd pinion side pin hole, A third knock pin can be provided.

1 is a front view showing a hydraulic excavator to which an embodiment of the present invention is applied. It is the top view seen from the upper side in the state which decomposed | disassembled the turning frame and the turning wheel. It is the top view which looked at the state which attached the turning wheel and the pinion drive device to the turning frame from upper direction. FIG. 4 is a cross-sectional view of a turning wheel, a turning frame, a pinion driving device, and the like when viewed from the direction of arrows IV-IV in FIG. 3. It is a disassembled perspective view which shows a turning frame, a pinion drive device, etc. FIG. 5 is a cross-sectional view similar to FIG. 4, illustrating a state in which a turning frame is assembled to a turning wheel. FIG. 5 is a cross-sectional view similar to FIG. 4 showing a state in which a turning frame is assembled to a turning wheel. FIG. 5 is a cross-sectional view similar to FIG. 4, illustrating a state where the pinion drive device is assembled to the revolving frame. It is sectional drawing similar to FIG. 8 which shows the modification which fixed the 3rd knock pin to the turning frame side.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a swivel construction machine according to the present invention will be described in detail with reference to the accompanying drawings, taking as an example a case where it is applied to a hydraulic excavator.

  In the figure, reference numeral 1 denotes a hydraulic excavator as a typical example of a swing type construction machine. An upper swing body 3 mounted on the upper swing body, a swing device 6 described later provided between the lower traveling body 2 and the upper swing body 3, and a swing type working device provided on the front side of the upper swing body 3 4 is roughly constituted.

  Here, the lower traveling body 2 has a track frame 2A as a base, and a cylindrical round cylinder 2B is provided on the upper end side of the track frame 2A. An inner ring 7A of a turning wheel 7 to be described later is attached to the round body 2B of the lower traveling body 2.

  Reference numeral 5 denotes a revolving frame that serves as a base for the upper revolving structure 3, and the revolving frame 5 is a thick flat plate that extends forward and rearward in the center in the left and right directions, as shown in FIGS. A bottom plate 5A, left and right vertical plates 5B and 5C which are erected on the upper surface side of the bottom plate 5A and extend in the front and rear directions, and work devices provided at the front ends of the left and right vertical plates 5B and 5C 4 is substantially constituted by a support bracket 5D that supports 4, an arc-shaped left frame member 5E provided on the left side of the bottom plate 5A, and an arc-shaped right frame member 5F provided on the right side of the bottom plate 5A. It is a structure.

  Here, as shown in FIG. 4 and the like, on the lower surface side of the bottom plate 5A, an annular mounting portion 5G to be attached to an outer ring 7B of a turning wheel 7 described later is provided, and a bolt 9 described later is provided on this mounting portion 5G. A plurality of bolt holes (female screw holes) 5H, which are screwed together, are arranged in an annular shape (see FIG. 2). Further, first and second frame side pin holes 18 and 19 described later are formed in the mounting portion 5G of the bottom plate 5A at positions separated from each other. Further, a pinion insertion hole 5J is formed in the center portion of the bottom plate 5A between the left and right vertical plates 5B and 5C, and this pinion insertion hole 5J is inserted with a pinion 15 described later. is there.

  Further, an annular mounting seat 5K as a mounting portion is provided on the upper surface side of the bottom plate 5A. The mounting seat 5K is formed of an annular plate surrounding the pinion insertion hole 5J, and is welded to the upper surface side of the bottom plate 5A. It is fixed using the means. A plurality of bolt holes (female screw holes) 5L penetrating in the upward and downward directions are screwed into the mounting seat 5K and the bottom plate 5A of the revolving frame 5 at intervals in the circumferential direction (see FIG. 5).

  Next, 6 shows a turning device provided between the lower traveling body 2 and the upper turning body 3, and the turning device 6 turns the upper turning body 3 with respect to the lower traveling body 2. The turning device 6 includes a turning wheel 7 described later and a pinion driving device 10.

  Reference numeral 7 denotes a turning wheel provided between the lower traveling body 2 and the upper turning body 3, and the turning wheel 7 supports the lower traveling body 2 so that the upper turning body 3 can turn. Here, as shown in FIGS. 2 to 4, the turning wheel 7 constitutes a turning frame 5 and an inner ring 7 </ b> A that is attached to the round body 2 </ b> B provided on the lower traveling body 2 using a plurality of bolts 8. The outer ring 7B is attached to the lower surface side of the bottom plate 5A using a plurality of bolts 9, and a plurality of rolling elements 7C (only one is shown) disposed between the inner ring 7A and the outer ring 7B. Internal teeth 7D are formed on the inner peripheral side over the entire periphery.

  The outer ring 7B attached to the turning frame 5 is rotated around the inner ring 7A by a pinion driving device 10 described later, so that the upper turning body 3 turns on the lower traveling body 2. In this case, the upper end surface of the outer ring 7B is a mounting portion 7E attached to the bottom plate 5A of the turning frame 5, and first and second knock pins 16, 17 described later are projected from the mounting portion 7E. It has become.

  Reference numeral 10 denotes a pinion drive device attached to the swing frame 5 (bottom plate 5A) of the upper swing body 3. The pinion drive device 10 has a pinion 15 (described later) meshing with the internal teeth 7D of the swing wheel 7 (inner ring 7A). The turning frame 5 is turned on the round body 2B of the lower traveling body 2 by rotating the pinion 15 and transmitting a large rotational force to the inner ring 7A of the turning wheel 7.

  Here, as shown in FIGS. 4 and 5, the pinion drive device 10 is provided on a housing 12 that is attached to the mounting seat 5 </ b> K of the revolving frame 5 using a plurality of bolts 11, and on the upper end side of the housing 12. A hydraulic motor 13 as a rotation source, a reduction mechanism 14 provided in the housing 12 for reducing the rotation of the hydraulic motor 13, and a pinion 15 protruding downward from the housing 12 and outputting a rotation reduced by the reduction mechanism 14. It is roughly structured.

  In this case, an annular mounting flange 12 </ b> A that faces the mounting seat 5 </ b> K of the swivel frame 5 in the upper and lower directions is provided on the lower end side of the housing 12, and this mounting flange 12 </ b> A serves as a mounting portion for the swivel frame 5. Yes. Here, the mounting flange 12A is provided with a plurality of bolt insertion holes 12B corresponding to the respective bolt holes 5L screwed to the mounting seat 5K of the swivel frame 5, and the bolts 11 inserted into the respective bolt insertion holes 12B are received. The housing 12 of the pinion drive device 10 is attached to the upper surface side of the bottom plate 5A of the revolving frame 5 by screwing into each bolt hole 5L of the mounting seat 5K, and the pinion 15 passes through the pinion insertion hole 5J of the revolving frame 5. It protrudes downward and is configured to mesh with the internal teeth 7D of the turning wheel 7 (inner ring 7A).

  Next, 16 is a first knock pin provided on the outer ring 7 </ b> B of the swivel wheel 7, and the first knock pin 16 is disposed on a mounting portion 7 </ b> E with the bottom plate 5 </ b> A of the swivel frame 5. Here, the first knock pin 16 is formed of a cylindrical rod-like body having a tapered tip (upper end), and a proximal end (lower end) of the first knock pin 16 is embedded in the mounting portion 7E of the outer ring 7B. The side protrudes vertically upward toward the revolving frame 5. The first knock pin 16 is simultaneously inserted into a later-described first frame-side pin hole 18 provided in the turning frame 5 and a later-described first pinion-side pin hole 21 provided in the pinion driving device 10. It is what is done.

  Here, as shown in FIG. 6, the protruding length A1 of the first knock pin 16 protruding from the mounting portion 7E of the outer ring 7B is larger than the length dimension B1 above and below the first frame-side pin hole 18. Is also set larger (A1> B1). As a result, as shown in FIG. 7, with the first knock pin 16 being inserted into the first frame side pin hole 18, the tip side of the first knock pin 16 is located above the mounting seat 5 </ b> K of the swivel frame 5. It is the structure which protrudes.

  Reference numeral 17 denotes a second knock pin provided on the mounting portion 7E of the outer ring 7B at a distance of approximately 180 degrees in the circumferential direction from the first knock pin 16, and the second knock pin 17 has a tip similar to the first knock pin 16. It consists of a cylindrical rod-like body with a tapered side (upper side), its base end side (lower end side) embedded in the mounting portion 7E of the outer ring 7B, and its front end side vertically upward toward the turning frame 5 It protrudes. The second knock pin 17 is inserted into a later-described second frame side pin hole 19 provided in the revolving frame 5.

  Here, as shown in FIG. 6, the protruding length A2 of the second knock pin 17 protruding from the mounting portion 7E of the outer ring 7B is the length dimension B2 above and below the second frame side pin hole 19. They are set to be approximately equal (A2≈B2). As a result, as shown in FIG. 7, in the state where the second knock pin 17 is inserted into the second frame side pin hole 19 of the revolving frame 5, the tip side of the second knock pin 17 extends from the upper surface of the bottom plate 5A. It has a configuration that does not protrude.

  Reference numeral 18 denotes a first frame-side pin hole provided in the turning frame 5, and the first ram-side pin hole 18 is attached to the outer ring 7B of the turning wheel 7 in the bottom plate 5A as shown in FIG. It is formed as a through-hole penetrating the part 5G and the mounting seat 5K upward and downward. When the turning frame 5 is assembled to the turning wheel 7, the first frame-side pin hole 18 is penetrated by the first knock pin 16 protruding from the outer ring 7 </ b> B (mounting portion 7 </ b> E) of the turning wheel 7. It fits without gaps in the state (see FIG. 7).

  Reference numeral 19 denotes a second frame-side pin hole provided in the mounting portion 5G of the bottom plate 5A at a distance of approximately 180 degrees in the circumferential direction from the first frame-side pin hole 18, and the second frame-side pin hole 19 is As shown in FIG. 6 etc., it forms as a through-hole which penetrates the attachment part 5G of 5 A of bottom plates to the up and down direction. The second frame-side pin hole 19 allows the second knock pin 17 projecting from the outer ring 7B (mounting portion 7E) of the turning wheel 7 to have no gap when the turning frame 5 is assembled to the turning wheel 7. It fits (see FIG. 7).

  Thereby, as shown in FIGS. 6 and 7, when the turning frame 5 is assembled to the turning wheel 7, the first and second knock pins 16, 17 protruding from the outer ring 7B of the turning wheel 7 are The swivel frame 5 is positioned at two positions with respect to the outer ring 7B of the swivel wheel 7 by being inserted into first and second frame side pin holes 18 and 19 provided in the mounting portion 5G of the swivel frame 5, respectively. It is the structure which can do.

  Reference numeral 20 denotes a third frame-side pin hole provided between the first and second frame-side pin holes 18 and 19 and provided in the revolving frame 5, and as shown in FIG. The hole 20 is formed as a bottomed hole that is drilled upward and downward from the mounting seat 5K toward the bottom plate 5A. The third frame-side pin hole 20 is a third knock pin 23 (described later) provided in the housing 12 of the pinion drive device 10 when the pinion drive device 10 is assembled to the mounting seat 5K of the revolving frame 5. Are fitted without a gap (see FIG. 4).

  Reference numeral 21 denotes a first pinion side pin hole provided in the housing 12 of the pinion driving device 10, and the first pinion side pin hole 21 is formed on a mounting flange 12 </ b> A serving as a mounting portion with the turning frame 5 in the housing 12. It is provided and is formed as a through-hole penetrating the mounting flange 12A upward and downward.

  Then, as shown in FIG. 8, when the pinion drive device 10 is assembled to the revolving frame 5 assembled to the revolving wheel 7, the first knock pin protruding from the first frame side pin hole 18 of the revolving frame 5. 16 is inserted into a first pinion-side pin hole 21 provided in the housing 12 of the pinion driving device 10.

  In this way, the first knock pin 16 provided on the outer ring 7 </ b> B of the turning wheel 7 includes the first frame-side pin hole 18 of the turning frame 5 and the first pinion-side pin hole 21 of the pinion driving device 10. Are simultaneously inserted into each other, and the three members of the turning wheel 7, the turning frame 5, and the pinion driving device 10 are simultaneously positioned using the common first knock pin 16, and the inner ring of the turning wheel 7 is positioned. The pinion 15 of the pinion driving device 10 can be directly positioned with respect to the internal teeth 7D provided on 7A.

  Reference numeral 22 denotes a second pinion side pin hole provided in the housing 12 of the pinion driving device 10 so as to be separated from the first pinion side pin hole 21, and the second pinion side pin hole 22 is a mounting flange of the housing 12. 12A is formed in a portion corresponding to the third frame side pin hole 20 provided in the turning frame 5, and penetrates the mounting flange 12A upward and downward. And the 2nd pinion side pin hole 22 fixes the base end side of the 3rd knock pin 23 mentioned later.

  Reference numeral 23 denotes a third knock pin attached to the housing 12 of the pinion driving device 10, and the third knock pin 23 is formed of a cylindrical rod-like body having a tip end side (lower end side) tapered, and its base end The side (upper end side) is fitted and fixed to a second pinion side pin hole 22 provided in the mounting flange 12 </ b> A of the housing 12, and the distal end side projects vertically downward toward the revolving frame 5.

  As shown in FIG. 8, when the pinion drive device 10 is assembled to the revolving frame 5, the tip side of the first knock pin 16 is inserted into the first pinion side pin hole 21 of the pinion drive device 10. In addition, the third knock pin 23 is inserted into the third frame-side pin hole 20 of the revolving frame 5 so that the pinion driving device 10 can be positioned at two locations with respect to the revolving frame 5. It has become.

  The hydraulic excavator 1 according to the present embodiment has the above-described configuration. The hydraulic excavator 1 is self-propelled to the work site by the lower traveling body 2, and the upper revolving body 3 is swung by the swiveling device 6 while working. Excavation work such as earth and sand is performed using the device 4.

  Here, when the upper-part turning body 3 is turned, the hydraulic motor 13 of the pinion drive device 10 rotates, and the rotation of the hydraulic motor 13 is decelerated by the reduction mechanism 14 provided in the housing 12 and transmitted to the pinion 15. Thus, the pinion 15 rotates with a large rotational force (torque). The pinion 15 revolves along the inner ring 7A while meshing with the inner teeth 7D provided on the inner ring 7A of the turning wheel 7, and the revolving force of the pinion 15 is applied to the turning frame 5 via the housing 12 of the pinion drive device 10. By being transmitted, the upper swing body 3 performs a swing operation on the lower traveling body 2.

  Here, in the present embodiment, the first and second knock pins 16 and 17 project from the outer ring 7B of the turning wheel 7, and the first and first mounting portions 5G of the turning frame 5 with the outer ring 7B are provided. First and second frame-side pin holes 18 and 19 into which the two knock pins 16 and 17 are respectively inserted are provided, and the housing 12 of the pinion driving device 10 has a first protruding from the first frame-side pin hole 18. By providing the first pinion-side pin hole 21 into which one knock pin 16 is inserted, workability when the turning wheel 7, the turning frame 5, and the pinion driving device 10 are assembled to each other can be improved, and The internal teeth 7D of the swivel wheel 7 and the pinion 15 of the pinion drive device 10 can be appropriately meshed. Hereinafter, the assembly work of the swivel wheel 7, the swivel frame 5, and the pinion drive device 10 will be described. For be described.

  First, when the turning frame 5 is assembled to the turning wheel 7 attached to the circular body 2B of the lower traveling body 2, as shown in FIG. 6, the attachment portion of the outer ring 7B of the turning wheel 7 to the turning frame 5 is attached. The base end side of the first knock pin 16 and the base end side of the second knock pin 17 are fixed to 7E.

  Next, the turning frame 5 is lifted using a crane or the like (not shown), and the turning frame 5 is gradually lowered toward the turning wheel 7. Then, as shown in FIG. 7, a first frame-side pin hole in which the first knock pin 16 projecting from the outer ring 7B of the turning wheel 7 is formed in the attachment portion 5G and the attachment seat 5K of the turning frame 5 is provided. 18 and the second knock pin 17 is inserted into the second frame-side pin hole 19 formed in the attachment portion 5G of the turning frame 5.

  In this way, the first and second knock pins 16 and 17 projecting from the outer ring 7B of the turning wheel 7 are inserted into the first and second frame side pin holes 18 and 19 provided in the mounting portion 5G of the turning frame 5, respectively. By inserting each, the turning frame 5 can be positioned at two locations with respect to the outer ring 7B of the turning wheel 7.

  Then, in a state where the turning frame 5 is positioned with respect to the turning wheel 7 by the first and second knock pins 16, 17, the bolts 9 inserted into the outer ring 7 </ b> B are screwed into the respective bolt holes 5 </ b> H of the turning frame 5. The bottom plate 5A of the turning frame 5 can be mounted on the outer ring 7B of the turning wheel 7.

  In this case, the first and second knock pins 16 and 17 projecting from the outer ring 7B of the turning wheel 7 are used to position the turning frame 5 with respect to the turning wheel 7 at two locations, thereby providing each of the outer wheels 7B. Since the positioning of the bolt insertion hole (not shown) and each bolt hole 5H provided in the revolving frame 5 can be performed accurately, the revolving frame 5 is attached to the revolving wheel 7 (outer ring 7B) using a plurality of bolts 9. Workability when installing can be improved.

  Next, as shown in FIGS. 5 and 8, the base end side of the third knock pin 23 is fitted into the second pinion side pin hole 22 formed in the housing 12 (mounting flange 12 </ b> A) of the pinion driving device 10. Fix together. As a result, the distal end side of the third knock pin 23 protrudes vertically downward from the mounting flange 12 </ b> A of the housing 12 toward the revolving frame 5.

  Then, the pinion drive device 10 is lifted using a crane or the like (not shown), and the pinion drive device 10 is gradually lowered toward the mounting seat 5K of the revolving frame 5. At this time, as shown in FIG. 8, the front end side of the first knock pin 16 inserted into the first frame side pin hole 18 of the turning frame 5 protrudes upward from the mounting seat 5 </ b> K of the turning frame 5. . For this reason, when the mounting flange 12A of the housing 12 of the pinion driving device 10 abuts on the mounting seat 5K of the revolving frame 5, the first knock pin 16 protruding from the mounting seat 5K is provided in the mounting flange 12A. 1 is inserted into the pinion side pin hole 21. The third knock pin 23 fixed to the mounting flange 12A is inserted into the third frame side pin hole 20 formed in the mounting seat 5K and the bottom plate 5A of the turning frame 5.

  As a result, the housing 12 of the pinion driving device 10 can be positioned at two locations with respect to the mounting seat 5K of the swivel frame 5, and the lower surface of the swivel frame 5 passes through the pinion insertion hole 5J as shown in FIG. The pinion 15 protruding to the side can be engaged with the internal teeth 7D provided on the inner ring 7A of the turning wheel 7. In this state, the bolts 11 inserted into the respective bolt insertion holes 12B of the housing 12 are screwed into the respective bolt holes 5L screwed to the mounting seat 5K and the bottom plate 5A of the swing frame 5, thereby The pinion driving device 10 can be mounted on the mounting seat 5K.

  In this case, the first knock pin 16 projecting from the outer ring 7 </ b> B of the turning wheel 7 is inserted into the first pinion side pin hole 21 provided in the housing 12 of the pinion driving device 10, whereby the turning wheel 7. The internal teeth 7D provided on the inner ring 7A and the pinion 15 of the pinion driving device 10 can be directly positioned with reference to the first knock pin 16. As a result, the inner teeth 7D and the pinion 15 can be properly meshed with each other while securing an appropriate backlash.

  The pinion driving device 10 is positioned with respect to the turning frame 5 using the first knock pin 16 protruding from the outer ring 7B of the turning wheel 7 and the third knock pin 23 protruding from the housing 12 of the pinion driving device 10. Since the positioning of the bolt insertion holes 12B provided in the housing 12 and the bolt holes 5L provided in the revolving frame 5 can be performed accurately by performing the two steps, the revolving frame using a plurality of bolts 11 is used. The workability when the pinion driving device 10 is attached to the 5 mounting seats 5K can be improved.

  Thus, according to the present embodiment, the first and second knock pins 16 and 17 protrude from the outer ring 7B of the turning wheel 7, and the first and second knock pins 16 and 17 of the turning frame 5 are attached to the first and second mounting portions 5G. First and second frame-side pin holes 18 and 19 into which the second knock pins 16 and 17 are respectively inserted are provided, and the housing 12 of the pinion driving device 10 protrudes from the first frame-side pin hole 18. The first pinion side pin hole 21 into which the first knock pin 16 is inserted is provided.

  Thereby, when the turning frame 5 is assembled on the outer ring 7B of the turning wheel 7, the first and second knock pins 16 and 17 protruding from the outer ring 7B are provided to the first and second provided on the turning frame 5. By being inserted into the frame side pin holes 18 and 19, the turning frame 5 can be accurately positioned with respect to the turning wheel 7. Further, when the pinion driving device 10 is assembled on the turning frame 5, the first knock pin 16 protruding from the first frame side pin hole 18 has a first end provided on the housing 12 of the pinion driving device 10. By being inserted into the pinion side pin hole 21, the pinion driving device 10 can be accurately positioned with respect to the turning frame 5.

  In this way, the three members of the turning wheel 7, the turning frame 5, and the pinion driving device 10 can be simultaneously positioned using the common first knock pin 16, so that these turning wheels 7, It is possible to improve workability when the turning frame 5 and the pinion drive device 10 are assembled to each other.

  Moreover, the first knock pin 16 protruding from the outer ring 7B of the turning wheel 7 is inserted into the first pinion-side pin hole 21 provided in the housing 12 of the pinion driving device 10, whereby the inner ring of the turning wheel 7 is inserted. The internal teeth 7 </ b> D provided on 7 </ b> A and the pinion 15 of the pinion driving device 10 can be directly positioned with reference to the first knock pin 16. As a result, the inner teeth 7D of the inner ring 7A and the pinion 15 can be properly meshed with each other while ensuring an appropriate backlash. As a result, when excavation work or the like is performed using the hydraulic excavator 1, the upper swing body 3 can perform a smooth swing operation, so that the work accuracy of the excavation work using the work device 4 can also be improved.

  In the above-described embodiment, the proximal end side of the third knock pin 23 is fixed to the second pinion side pin hole 22 provided in the housing 12 of the pinion driving device 10, and the distal end of the third knock pin 23 is fixed. The case where the side is inserted into the third frame side pin hole 20 provided in the turning frame 5 is illustrated. However, the present invention is not limited to this. For example, the present invention may be configured as a modification shown in FIG.

  That is, the distal end side of the third knock pin 23 (by fitting the base end side (lower end side) of the third knock pin 23 to the third frame side pin hole 20 provided in the turning frame 5 (fixed). The upper end side is projected from the mounting seat 5K of the revolving frame 5 to the pinion driving device 10 side, and the tip side of the third knock pin 23 is the second pinion side pin hole 22 provided in the housing 12 of the pinion driving device 10. It is good also as a structure inserted in.

  Moreover, in embodiment mentioned above, the hydraulic excavator 1 provided with the lower traveling body 2 which can be self-propelled as a turning type construction machine is mentioned as an example. However, the present invention is not limited to this. For example, a dredger in which a turning body is mounted on a deck of a carriage through a turning device, or a turning body is mounted on a tower-shaped leg portion through a turning device. It can also be widely applied to other swivel construction machines such as stationary tower type jib cranes and glow up cranes. Here, in the case of a dredger, a base boat is a base, and in the case of a tower-type jib crane, a leg (post) is a base.

1 Hydraulic excavator (swivel construction machine)
2 Lower traveling body (base)
2B Round body 3 Upper swing body (swivel body)
5 Turning frame 5G Mounting part 5K Mounting seat (Mounting part)
6 Turning Device 7 Turning Wheel 7A Inner Ring 7B Outer Ring 7C Rolling Element 7D Inner Teeth 7E Mounting Portion 10 Pinion Drive Device 12 Housing 12A Mounting Flange 13 Hydraulic Motor (Rotation Source)
14 Deceleration mechanism 15 Pinion 16 1st knock pin 17 2nd knock pin 18 1st frame side pin hole 19 2nd frame side pin hole 20 3rd frame side pin hole 21 1st pinion side pin hole 22 2nd Pinion side pin hole 23 Third knock pin

Claims (4)

A base body having a round cylinder; a revolving body having a revolving frame that forms a support structure; and a revolving body that is turnably mounted on the base body; and the revolving body that is provided between the base body and the revolving body with respect to the base body A turning device for turning,
The turning device includes an inner ring having inner teeth formed on an inner peripheral side and attached to the round body of the base, and an outer ring provided on the outer peripheral side of the inner ring via a rolling element and attached to the turning frame of the turning body. A turning construction machine comprising a turning wheel and a pinion driving device that rotationally drives a pinion meshing with the inner teeth of the inner ring,
The outer ring of the swivel wheel is provided with a first knock pin and a second knock pin that are located at an attachment portion with the swivel frame and project toward the swivel frame side,
A first frame-side pin hole into which the first knock pin is inserted and a second frame-side pin into which the second knock pin is inserted into the turning frame, which is located at a mounting portion with the outer ring. A hole,
The pinion driving device is provided with a first pinion side pin hole into which the first knock pin protruding from the first frame side pin hole is located at an attachment portion with the turning frame. A swivel construction machine characterized by The pinion drive device is provided with a third knock pin that is located at an attachment portion with the turning frame and protrudes toward the turning frame,
The swivel construction machine according to claim 1, wherein the swivel frame is provided with a third frame side pin hole into which the third knock pin is inserted and located at an attachment portion with the pinion drive device. . The swivel frame is provided with a third knock pin that is located at an attachment portion with the pinion drive device and protrudes toward the pinion drive device side,
2. The swing construction machine according to claim 1, wherein the pinion drive device is provided with a second pinion side pin hole into which the third knock pin is inserted and located at an attachment portion with the swing frame. . The pinion drive device includes a housing having a mounting flange on the lower end side, a rotation source provided on the upper end side of the housing, a speed reduction mechanism provided in the housing for reducing the rotation of the rotation source, and the housing. The pinion that is rotatably supported and outputs the rotation decelerated by the speed reduction mechanism,
4. The swivel construction machine according to claim 1, wherein an attachment portion of the pinion drive device to the swivel frame is a fitting flange of the housing.

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