JP2010070927A - Device for protecting revolving frame of construction machinery - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a revolving frame protection device which facilitates repair and replacement operations on the occurrence of damage, and which is equipped with a side guard for increasing strength and mounting strength against an impact. <P>SOLUTION: Welding makes mounting seats 16 with a threaded hole 17 fixed to a plurality of locations on outer peripheral side surfaces of side frames 10 and 11 which form both the vehicle-width-direction sides of the revolving frame 13 of upper machinery; the side guard 15 is fastened and fixed to the side frames 10 and 11 by a bolt 22 for being screwed into the threaded hole 17; and the number of the mounted side guards 15 can be changed depending on the lengths of the side frames 10 and 11. In addition, the side guard 15 is formed in a vertically and horizontally symmetrical block shape from a composite material made of a metallic material and a rubber material. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a turning frame protection device for a construction machine, and more particularly to a turning frame protection device for a construction machine that protects an outer peripheral side surface of a turning frame (side frame) of an upper traveling body from an impact.

  Conventionally, a hydraulic excavator as a construction machine of this type is such that an upper swing body is pivotably mounted on a lower traveling body, and a boom, an arm, a bucket, etc. A work attachment consisting of

  The revolving frame includes a center frame extending in the front-rear direction and side frames disposed on both the left and right sides of the center frame. Furthermore, a cab is provided on one front side of the swivel frame, and a machine room or the like is provided on the other front side of the swivel frame.

  Since the above hydraulic excavator often performs construction work in places where there are obstacles such as rocks and concrete structures, the side frame that forms the outer circumferential side of the swivel frame is the surrounding obstacle when the upper swivel turns. There is a problem that it is easy to be damaged such as deformation by colliding with an object or receiving an impact by a flying stone.

  In order to solve the above-mentioned problems, various devices for protecting the side frame have been proposed. For example, a device has been proposed in which an impact-preventing resin bumper (side guard) is attached to the outer peripheral side surface of the side frame to protect the side frame from impact.

The resin bumper is formed so as to cover the outer peripheral side surface of the side frame, and the resin bumper is provided with an insertion hole. Then, the resin bumper is attached to the outer peripheral side surface of the side frame by inserting a bolt into the insertion hole of the resin bumper and tightening the resin bumper (see, for example, Patent Document 1).
Utility model registration No. 2538203.

  According to the above-described prior art, the resin bumper as the side guard does not have a high strength against impact in terms of material, and thus is easily damaged by deformation such as deformation and indentation. For example, when a resin bumper is damaged even at one location, the entire resin bumper must be repaired or replaced, which requires a great deal of labor and expense. Further, since the resin bumper is directly attached to the side frame by bolting, there is a problem that the attachment strength is relatively small and weak.

  Therefore, there is a technical problem to be solved in order to provide a turning frame protection device for a construction machine having a side guard that facilitates repair and replacement work at the time of damage, and increases durability and mounting strength against impact. The present invention aims to solve this problem.

  The present invention has been proposed to achieve the above object, and the invention according to claim 1 is characterized in that the outer peripheral side surface of the side frame forming both sides in the vehicle width direction of the turning frame of the upper turning body is provided with a plurality of side guards. A swivel frame protection device for a construction machine configured to protect, by fixing a mounting seat having screw holes at a plurality of locations on the outer peripheral side surface of the side frame by welding, and by bolts screwed into the screw holes Provided is a swivel frame protection device for a construction machine, wherein the side guard is fastened and fixed to the side frame, and the number of the side guards attached can be changed according to the length of the side frame.

  According to this configuration, the mounting seat is fixed to a predetermined portion of the side frame by welding so as to correspond to the mounting positions of the plurality of side guards. Then, by fastening and fixing the side guard to the side frame with a bolt that is screwed into the screw hole of the mounting seat, the outer peripheral side surface of the side frame is protected by the side guard. In this case, the number of side guards attached is changed and adjusted according to the length of the side frame.

  According to a second aspect of the present invention, there is provided the swivel frame protection device for a construction machine according to the first aspect, wherein the side guard is formed in a block shape symmetrical in the vertical and horizontal directions.

  According to this configuration, since the side guard is formed in a vertically and horizontally symmetrical block shape, when the side guard is attached, the side guard can be quickly attached without confirming the up-down direction and the left-right direction of the side guard.

  According to a third aspect of the present invention, the side guard is made of a metal material and a rubber material, and the metal portion of the side guard is configured to come into contact with the metal mounting seat and be firmly fixed. A turning frame protection device for a construction machine according to claim 1 or 2 is provided.

  According to this configuration, the side guard is formed using a composite material composed of a metal material and a rubber material, and the metal portion of the side guard is fixed in contact with the metal mounting seat. The side guard itself has both an elastic function by the rubber material and a high rigidity function by the metal material, and in addition, the fixing force between the side guard and the mounting seat becomes strong.

  According to a fourth aspect of the present invention, a fitting recess for fitting a mounting seat fixed to the side frame is provided on the back side of the side guard, and the back side of the side guard contacts the outer side surface of the side frame. The swivel frame protection device for a construction machine according to claim 1, 2 or 3, wherein the swivel frame protection device is fixed in contact therewith.

  According to this configuration, when the side guard is attached to the side frame, the side guard is automatically positioned by fitting the attachment seat on the side frame side into the fitting recess on the back side of the side guard. Install. Then, by tightening the side guard with a bolt, the back surface of the side guard comes into contact with the outer side surface of the side frame and is fastened and fixed.

  According to a fifth aspect of the present invention, the front side of the side guard is provided with a recess in which the head of the bottle is loosely fitted, and the end face of the head of the bottle faces the front of the side guard. 5. The turning frame protection device for a construction machine according to claim 1, 2, 3 or 4, wherein the device is configured to be unity.

  According to this configuration, when the side guard is tightened and attached to the side frame with the bottle, the head end face of the bolt forms the same plane as the front face of the side guard, and the head of the bolt projects from the front face of the side guard. Never do.

  In the first aspect of the present invention, when only one of the plurality of side guards fixed to the side frame is damaged, only the one damaged side guard may be partially repaired or replaced. Therefore, when the side guard is damaged, the side guard can be repaired or replaced easily and quickly.

  In addition, if the length of the side frame is changed due to a change in the model and / or specification of the construction machine, it can be easily dealt with by appropriately changing and adjusting the number of side guards attached. There is no need to prepare many different side guards.

  Furthermore, since the side guard is bolted and fixed to a mounting seat fixed to the side frame by welding, the appearance of the side guard is improved as compared with a method in which the side guard is directly welded to the side frame.

  Furthermore, since the mounting position of the side guard with respect to the side frame can be changed by changing the position of the mounting seat fixed to the side frame, the degree of freedom of the mounting position of the side guard is increased. For example, the attachment position of the side guard can be appropriately adjusted at the construction site as necessary.

  Since the invention according to claim 2 can be attached without confirming the vertical and horizontal directions of the side guard when the side guard is attached, in addition to the effects of the invention according to claim 1, the side guard is easy to handle. Combined with the block shape, the side guard can be repaired and replaced more easily and quickly.

  In the invention described in claim 3, since the side guard made of a metal material and a rubber material has optimum elasticity and high rigidity, in addition to the effect of the invention described in claim 1 or 2, an impact acts on the side guard. At the same time, high impact relaxation performance can be exhibited, and coupled with the fact that the fixing force between the side guard and the mounting seat becomes strong, it is possible to maintain high durability against impact for a long time.

  In the invention according to claim 4, when the side guard is attached to the side frame, the mounting seat on the side frame side is fitted into the fitting recess on the side guard side, so that the position is fixed. In addition to the effects of the described invention, the positioning work of the side guard with respect to the side frame becomes unnecessary. Further, the side guard can be fastened and fixed by tightening the bolt so that the back surface of the side guard is brought into close contact with the side frame, so that the mounting strength of the side guard is further improved.

  The invention according to claim 5 is the bottle according to claim 1, 2, 3 or 4 because the bottle head for fastening the side guard to the side frame forms the same plane as the front face of the side guard. In addition to the effect, the appearance of the side guard is further improved.

  In order to achieve the object of the present invention, there is provided a swivel frame protection device provided with a side guard that facilitates repair / replacement work at the time of damage and increases durability and mounting strength against impacts. A swivel frame protection device for a construction machine configured to protect the outer peripheral side surface of a side frame that forms both sides of the swivel frame of the body with a plurality of side guards, and a plurality of locations on the outer peripheral side surface of the side frame A mounting seat having a screw hole is fixed to the side frame by welding, and the side guard is fastened and fixed to the side frame by a bolt that is screwed into the screw hole, and the number of side guards to be attached is determined according to the length of the side frame. It was realized by configuring so that can be changed.

  Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an overall view showing a hydraulic excavator as a construction machine according to the present embodiment. As shown in the figure, the excavator 1 includes a lower traveling body 2 provided with a crawler, and an upper revolving body 3 that is pivotably mounted on the lower traveling body 2. A work attachment 7 including a boom 4, an arm 5, a bucket 6, and the like is attached to the front center portion of the frame 13 so as to be able to move up and down.

  As shown in FIG. 2, the turning frame 13 includes a center frame 8 and a tail frame 9 extending in the front-rear direction, and side frames 10 and 11 disposed on both sides of the center frame 8 and the tail frame 9 in the vehicle width direction. Yes. Further, a cab 12 is mounted on one front side of the swivel frame 13, and a machine room 14 is provided on the other front side of the swivel frame 13.

  Next, the turning frame protection device according to the present embodiment will be described. The outer peripheral side surfaces of the side frames 10 and 11 of the revolving frame 13 are covered with a plurality of side guards 15, 15.

  FIG. 3 shows side guards 15, 15... Attached to the side frame 10 on the cab 12 side. The side guards 15, 15... Are only two in a region excluding a portion corresponding to the cab 12 of the side frame 10. is set up. Therefore, since the side guards 15, 15... Are not installed at locations corresponding to the cab 12 of the side frame 10, the side guards 15, 15 ... are not disturbed when the operator gets on and off the cab 12. It is configured.

  FIG. 4 shows side guards 15, 15... Attached to the side frame 11 on the machine room 14 side, and the four side guards 15, 15... It is attached with.

  Therefore, since the side frames 10, 11 are protected by the side guards 15, 15,..., For example, when the upper revolving unit 3 is turned, obstacles such as fragments of concrete structures, stepping stones, etc. on the outer peripheral side surfaces of the side frames 10, 11 When an object collides and receives an impact, the outer peripheral side surfaces of the side frames 10 and 11 are not easily damaged such as deformation and indentation.

  FIG. 5 is an explanatory view showing a specific example of the turning frame protection device. In the figure, reference numeral 16 denotes a mounting seat fixed to a plurality of locations on the outer peripheral side surfaces of the side frames 10 and 11 by welding, and a screw hole 17 is opened at the center of each mounting seat 16. In addition, a plurality of mounting seats 16 are provided with one pair of left and right side guards 15, 15. The mounting seats 16 are arranged at predetermined intervals in the length direction of the side frames 10 and 11, and are located at the positions of the bolt insertion holes 18 provided at the left and right ends of the side guards 15, 15. It corresponds.

  Further, as shown in FIG. 9 (a), a cylindrical fitting recess 20 is formed in the inner end portion (end portion on the side of the side guard back side) of the insertion hole 18 formed in each side guard 15, 15. The attachment seat 16 is fitted in the fitting recess 20. A cylindrical recess 21 is also formed in a stepped shape at the outer end of the insertion hole 18 (the end on the front side of the side guard), and a tightening bolt 22 can be rotated in the recess 21. It is provided loosely.

  And the head end surface of this volt | bolt 22 forms the same surface as the outer surface of the side guards 15, 15 .... Accordingly, the side guards 15, 15... Are fastened and fixed to the side frames 10, 11 by the bolts 22 passing through the insertion holes 18 and screwed into the screw holes 17 on the mounting seat 16 side.

  The number or position of the side guards 15, 15... Is set in accordance with the length dimension of the side frames 10, 11 according to the model and / or specification of the hydraulic excavator 1.

  Next, specific structural examples of the side guards 15, 15... Will be described in detail with reference to FIGS. In the illustrated example, the side guards 15, 15... Are formed in a rectangular (band-like) block shape in a plan view that is symmetrical vertically. For this reason, when attaching the side guards 15, 15... To the side frames 10, 11, the side guards 15, 15. Can be easily attached to.

  The side guards 15, 15... Function as a composite material in which a rubber material and a metal material are integrated with each other, specifically, a thin steel plate 24 embedded in a rubber plate 23 having a predetermined thickness. It is formed of a functional composite material. Therefore, the side guards 15, 15... Have not only an appropriate elastic function by the rubber plate 23 but also a high rigidity function by the steel plate 24.

  In addition, the front side part of the rubber plate 23 is formed so that the shape of the longitudinal section and the transverse section is a trapezoid. For this reason, the front side portion of the rubber plate 23 is set so that both the vertical width and the left and right length dimensions are smaller than the back side portion of the rubber plate 23.

  As described above, according to the present invention, the mounting seat 16 with the screw hole 17 is fixed to a predetermined portion of the side frames 10 and 11 by welding so as to correspond to the mounting positions of the plurality of side guards 15, 15. The side guards 15, 15... Are firmly fastened and fixed to the side frames 10, 11 by the tightening force of the bolts 22 screwed into the screw holes 17 of the mounting seat 16.

  Thus, the outer peripheral surfaces of the side frames 10, 11 are protected by the side guards 15, 15 ... so as not to be damaged by impact. In this case, the number of attached side guards 15, 15... Is changed according to the length of the side frames 10, 11.

  For example, as shown in FIGS. 13 and 14, when the model and / or specification of the hydraulic excavator 1 is different, the size or shape of the side frames 10 and 11 is also different, so the number of attached side guards 15 is changed accordingly. Is done. For example, as shown in FIG. 13, four side guards 15 are attached to the side frame 10 on the cab 12 side, and the number of attached side guards 15 is increased by one as compared with the embodiment of FIG.

  Thus, even when the length of the side frames 10, 11 is changed due to a change in the model and / or specification of the hydraulic excavator 1, the present invention changes the side guards 15, 15. Since it can respond easily to the change of the length of the frames 10 and 11, it is not necessary to prepare many types of side guards 15, 15.

  In addition, when the side guards 15, 15... Fixed to the side frames 10, 11 are damaged by an impact, only the damaged side guards 15, 15. It is possible to easily and quickly repair or replace the side guards 15, 15.

Further, since the side guards 15, 15... Are fixed to the mounting seats 16 welded to the side frames 10, 11, with bolts 22, the side guards 15, 15,. Thus, coupled with the fact that the bolts 24 form the same plane as the side frames 10 and 11, the appearance in appearance is significantly improved compared to the conventional example.
In particular, in this embodiment, as illustrated in FIG. 9B, the metal portion (steel plate 24) of the side guard 15 is fixed in surface contact with the receiving surface of the metal mounting seat 16. The fixing force between the side guard 15 and the mounting seat 16 is strengthened by the tightening force of 22. In this case, since the back surfaces (rubber plates 23) of the side guards 15, 15.

  Further, by changing the fixing position of the mounting seat 16 with respect to the side frames 10, 11, the side guards 15, 15 ... can be retrofitted, so the mounting positions of the side guards 15, 15 ... can be freely changed, The degree of freedom of installation is improved. For example, it is possible to easily change and adjust the attachment positions of the side guards 15, 15.

  The side guards 15, 15... According to the present embodiment are vertically and horizontally symmetrical and are formed in a block shape elongated in the left-right direction. Therefore, it is easy to carry and handle the side guards 15, 15... During the attaching / detaching operation, and the bolt tightening operation can be performed more quickly.

  Further, since the side guards 15, 15... Are formed by embedding the steel plate 24 inside the rubber plate 23, the elastic action by the rubber plate 23 and high rigidity by the steel plate 24 are ensured. Thus, even when a strong impact force is applied to the side guards 15, 15,. The mounting strength of… is further improved. In particular, the side guards 15, 15... Can be divided into a plurality of desired short dimensions and the number of attachments can be changed as appropriate, whereby the adjustment of the overall length of the side guards 15, 15.

  It should be noted that the present invention can be variously modified without departing from the spirit of the present invention, and the present invention naturally extends to the modified ones.

1 is an overall side view showing a hydraulic excavator equipped with a turning frame protection device according to an embodiment of the present invention. The top view which shows the turning frame of the hydraulic shovel which concerns on a present Example. The perspective view which shows the state which attached the turning frame protection apparatus which concerns on a present Example to the side frame by the side of a hydraulic excavator. The perspective view which shows the state which attached the turning frame protection apparatus which concerns on a present Example to the side frame by the side of the machine room of a hydraulic shovel. The perspective view which expands and shows the turning frame protection apparatus which concerns on a present Example. The front view which shows the side guard which concerns on one Example of this invention. The left view of FIG. The right view of FIG. 9A is a cross-sectional view taken along line AA in FIG. 6, and FIG. 9A is a detailed view illustrating a cross-sectional structure of a side guard mounting portion. Sectional drawing which follows the BB line of FIG. The rear view of FIG. The top view of FIG. The perspective view which shows the state which attached the turning frame protection apparatus which concerns on a present Example to the side frame by the side of the cab of the hydraulic shovel from which a model differs. The perspective view which shows the state which attached the turning frame protection apparatus which concerns on a present Example to the side frame by the side of the machine room of the hydraulic shovel of FIG.

Explanation of symbols

1 Excavator (construction machine)
2 Lower traveling body 3 Upper revolving structure 10 Side frame 11 Side frame 13 Revolving frame 15 Side guard 16 Mounting seat 17 Screw hole 18 Insertion hole 20 Fitting recess 21 Recess 22 Bolt 23 Rubber plate 24 Steel plate

Claims (5)

A swivel frame protection device for a construction machine that protects an outer peripheral side surface of a side frame that forms both sides in the vehicle width direction of a swivel frame of an upper swing body with a plurality of side guards,
Mounting seats having screw holes are fixed to a plurality of locations on the outer peripheral side surface of the side frame by welding, and the side guard is fastened and fixed to the side frame by bolts screwed into the screw holes. The turning frame protection device for a construction machine, wherein the number of attached side guards can be changed according to the construction.   2. The turning frame protection device for a construction machine according to claim 1, wherein the side guard is formed in a block shape symmetrical in the vertical and horizontal directions.   2. The side guard is made of a metal material and a rubber material, and the metal portion of the side guard is configured so as to be firmly fixed in contact with the metal mounting seat. Or the turning frame protection apparatus of the construction machine of 2 description.   On the back side of the side guard, there is provided a fitting recess in which a mounting seat fixed to the side frame is fitted, and the side guard is fixed with its back surface abutting on the outer side surface of the side frame. The turning frame protection device for a construction machine according to claim 1, 2 or 3.   The front side of the side guard is provided with a recess in which the head of the bottle is freely fitted so that the end face of the bottle head is flush with the front of the side guard. 5. The turning frame protection device for a construction machine according to claim 1, 2, 3, or 4.

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