JP2589494B2 - Work equipment swivel base mounting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention separates a work machine swivel from a car and transports it separately on a road, such as a crane truck such as a truck crane or a huge losing shovel. The present invention relates to a vehicle equipped with a turning work machine.

[Conventional technology]

As a mounting device for such a working machine swivel base, a flange is integrally formed on an outer periphery of a joint portion between a lower seat ring fixed to a body frame and an upper seat ring on the working machine swivel side detachably mounted thereon. A plurality of U-shaped cross-section locking members capable of pressing and tightening both flanges are provided on the vehicle body frame outside the upper and lower seat rings in contact with the upper and lower seat rings so as to be able to advance and retreat in the radial direction of the seat rings. The invention in which the locking member is advanced and retracted by the expansion and contraction of the telescopic cylinder with respect to both flanges has been disclosed in Japanese Utility Model Laid-Open Publication No.
No. 968, the center of the upper and lower seat rings is matched by the extension force of the telescopic cylinder, and at the same time, the upper and lower flanges are pressed against each other and the two flanges are fixed by frictional force. Of the inner and outer races of the turntable attached to the work machine swivel side, the ball rolling surface integral with the upper seat ring may be distorted. At the same time, the rigidity of the upper and lower seat rings and the body frame must be increased.

Also, at the time of coupling the upper and lower seat rings, at least a pair of fan-shaped clamp rings, one end of which is pin-connected, are rotated to the flange tightening position of the upper and lower seat rings by the telescopic cylinder, and the taper provided inside the fan-shaped clamp ring is provided. Japanese Patent Application Laid-Open Nos. 51-91560 and 57-184882, in which the flanges (wedge portions) of the upper and lower seat rings are relatively pressed into the grooves (wedge grooves), are also known. However, the pushing force of the wedge into the tapered groove should not be uniform over the entire circumference of the fan-shaped clamp ring means.

Therefore, in order to improve the load lifting capacity, as the diameter of the fan-shaped clamp ring means increases, its strength and weight must increase at an accelerated rate, and the maximum output of the telescopic cylinder must also increase more than necessary. Therefore, the rigidity and weight of the entire mounting device for the work machine swivel base are increased accordingly, and there is a problem in that a dramatic improvement in the ability to lift the load is prevented.

[Problems to be solved by the invention]

Recently, as construction work has become larger, it has been desired to dramatically improve the luggage lifting capacity of the work equipment. However, when attempting to significantly increase the luggage lifting capacity, a truck crane as shown in FIG. The mounting position of the count weight 11 with respect to the crane swivel 10 must be shifted as far as possible from the turntable 14 mounted on the vehicle body 13 to the rear of the crane swivel as far as possible without interfering with the car cab 12. The diameter of the table and the upper and lower seat rings must be significantly increased (in the embodiment of FIG. 9, the outer diameter of the washer is about 2.5 m) to cope with an increase in the weight of the work machine swivel and the load. In this case, the weight of the inner and outer wheels, the upper and lower seat rings, the body frame, and the like is significantly increased, and it is not possible to expect a dramatic improvement in luggage lifting capacity.

[Means for solving the problem]

The present invention addresses this problem. (1) The lower seat ring fixed on the vehicle body frame and the upper seat ring on the working machine swivel side, which is detachably connected to the lower seat ring by a key, are attached to the outer periphery of the contact portion. In the case of a vehicle equipped with a turning work machine that is integrally provided with a flange, the flanges of the upper and lower seat rings (2a, 1
a) is an annular groove (6a) that can be fitted with a small gap up and down
And a C-shaped locking ring (6) provided with one notch (S) is slidably supported on the vehicle body frame such that the annular groove faces the flanges. The ends of the arms (7) and (8) projecting tangentially from both ends of the C-shaped rock ring are connected by a telescopic cylinder (9), and the C-shaped rock ring is connected to the upper and lower seat rings (9). (2) A structure in which the openable position can be opened and closed between a separable open position and a tightening position where the inner peripheral surface of the C-shaped locking ring contacts the corresponding upper and lower seat rings or the outer peripheral surface of its flange. A power actuating device for moving the central portion of the C-shaped rock ring forward and backward along the diameter line (D) including the notch is mounted on the vehicle body frame, and the expanded C-shaped rock ring is radiused from the flanges. The outer peripheral surface of the C-shaped rock ring may also be disengaged outward in the direction. Lower seat ring or working machine revolving base mounting apparatus characterized by being configured so as to be also brought into contact with the outer peripheral surface of the flange.

(2) A swing working machine equipped with a flange integrally provided on the outer periphery of the contact portion between the lower seat ring fixed on the body frame and the upper seat ring on the working machine swivel side which is separably connected to the key by means of a key. In the car, the flanges of the upper and lower seat rings (2a, 1
a) is an annular groove (6a) that can be fitted with a small gap up and down
And a C-shaped locking ring (6) provided with one notch (S) is slidably supported on the vehicle body frame such that the annular groove faces the flanges. The ends of the arms (7) and (8) projecting tangentially from both ends of the C-shaped rock ring are connected by a telescopic cylinder (9), and the C-shaped rock ring is connected to the upper and lower seat rings (9). (2) A structure in which the openable position can be opened and closed between a separable open position and a tightening position where the inner peripheral surface of the C-shaped locking ring contacts the corresponding upper and lower seat rings or the outer peripheral surface of its flange. And a stopper member (38) that can be brought into contact with the outside of the central portion of the expanded C-shaped rock ring on the diameter line (D) including the notch, and the diameter line (D). Stopper members (36, 37) which are arranged symmetrically and which can abut and engage outside near both ends of the expanded C-shaped rock ring. So that the C-shaped rock ring at the expanded position is separated radially outward from the flanges.
A work machine swivel mount mounting device, which is mounted on a body frame.

Is the gist.

[Action]

According to the above configuration, when the C-shaped rock ring 6 is tightened by the telescopic cylinder 9, the upper and lower seat rings 2, 1 in the abutted state are joined by fitting the flanges 2a, 1a into the annular groove 6a. This is because the tightening force of the telescopic cylinder 9 acts tangentially between both ends of the C-shaped rock ring via the arms 7 and 8, and the C-shaped rock ring only bends symmetrically. The tightening force of the telescopic cylinder may be small, and even if the rigidity of the upper and lower seat rings, the inner and outer rings, etc. is lower than the diameter thereof, there is no possibility of distortion.

In order to release the connection between the upper and lower seat rings, the tightened C-shaped rock ring is expanded by a telescopic cylinder, and the center of the C-shaped rock ring opened symmetrically with respect to the diameter line including the notch S is formed by the upper and lower flanges. In the case of the first invention in the upper and lower parts, the central part of the C-shaped rock ring is retracted by the power actuating device along the diameter line, so that there is a danger that it will remain until it is substantially engaged with 2a, 1a. The C-shaped rock ring is disengaged radially outward from the upper and lower flanges to enable lifting of the upper seat ring side. When rejoining the upper and lower washer rings with this detached C-shaped rock ring,
After the central portion of the C-shaped rock ring is advanced by the power actuating device until it engages with the upper and lower flanges, the C-shaped rock ring may be tightened by the telescopic cylinder.

In the case of the second invention, when the tightened C-shaped rock ring is expanded by the telescopic cylinder, both ends of the C-shaped rock ring are pressed against stopper members 36 and 37 provided outside thereof. The C-shaped rock ring is slid until it engages with the other stopper member 38 by the resultant force of the reaction force when
When the C-shaped rock ring is completely expanded, it is positioned by the entire stopper member, and the C-shaped rock ring is separated radially outward from the flanges over its entire circumference. The ring can be lifted from the lower ring. In this case, it is clear that the C-shaped rock ring may be simply tightened by the telescopic cylinder when the upper and lower seat rings are connected.

〔Example〕

FIGS. 1 to 8 show an embodiment of the first invention applied to the truck crane shown in FIG. 9, and a working machine swivel 10 having a multi-stage telescopic boom 15 and its derrick cylinder 16 and a crane operating room 17 and the like. The turntable 14 has an inner ring 19 fixed to the bottom of the turntable 10 with a number of bolts 18 and a roller 2
An outer ring 23 attached to the outer ring 23 only rotatably via 0, 21, 22; and a plurality of hydraulic motors (not shown) mounted on a swivel table on a large gear 24 cut outside the outer ring. , A plurality of pinions 25 driven respectively mesh with each other.

The upper seat ring 2 is provided so as to protrude below the outer ring 23. The lower end of the upper seat ring and the flange 2a are mounted on the lower seat ring 1 welded and fixed on the vehicle body frame 13 and the flange 1a. A circular fitting portion provided between the inner sides of the upper and lower seat rings that are in contact with each other is provided with an annular projection 3 projecting upward from the inside of the lower seat ring 1.
A tapered hole 4 is formed in the lower inner periphery of the upper seat ring 2 so that the upper tapered surface formed on the outer periphery of the annular projection fits. Therefore, the radial thickness of the upper seat ring 2 and the annular projection 3 is smaller than that of the lower seat ring 1 to facilitate the fitting of the circular fitting portions (3, 4).

The C-shaped rock ring 6 is formed in a circular shape substantially at the center between the tightening position shown in FIGS. 2 and 3 and the expanded position shown in FIG. 8, and one end of the C-shaped rock ring is formed. A base 7a of the arm 7 extending beyond the notch S is bathed outside, and a base 8a of the arm 8 sandwiching the arm 7 is bathed outside the other end. Are connected by a telescopic cylinder 9. Reference numeral 26 denotes a lock bolt for holding the C-shaped lock ring in the tightened state shown in FIG. 3, and the lock bolt 26 penetrates a bracket 27 fixed to the outer end of the C-shaped lock ring on the side of the arm 8 to which the arm 7 is attached. Screwed into the tip end plate 7b of the lock nut 28
Is fixed by Therefore, when the C-shaped locking ring is expanded, the locking bolt is removed.

As shown in FIG. 7, the width B of the annular groove 6a of the C-shaped rock ring is shown.
Is slightly larger than the total thickness T of the upper and lower flanges 2a, 1a that are in contact with each other, and the C-shaped rock ring 6 is slidable horizontally in three plate-shaped supports 29, 30, 31 fixed on the vehicle body. Supported by
The annular groove faces the upper and lower flanges.

The plate-like abutment 29 and the notch S are respectively located on both ends of the diameter line D of the lower seat ring 1, and the central portion of the C-shaped rock ring 6 is formed by two side engagement pieces 35 projecting from the lower surface thereof. By holding the abutment 29, it is slidably guided along the diameter line D. Numeral 32 denotes a hydraulic cylinder of a power actuating device for moving the central portion of the C-shaped rock ring forward and backward along the diameter line D.
The base end of 32 is connected to a bracket 33 on the vehicle body. When the hydraulic cylinder 32 is fully contracted, the expanded C-shaped rock ring is positioned radially outward of the upper and lower flanges 2a, 1a. Reference numeral 34 denotes a piston rod connection bracket on the C-shaped lock ring side.

As shown in FIGS. 4 to 6, three to four keys 5 are mounted between the upper and lower seat rings 2 and 1 so as to be able to separate the upper and lower seat rings. 5 cooperates with the center fitting action of the upper and lower seat rings by the circular fitting portions (3, 4) to reliably prevent the relative rotation between the upper and lower seat rings and to stop the swivel 10 during turning. The large rotational inertia of the vehicle is transmitted to the body frame side.

Since a small gap (for example, less than 0.5 mm) is formed between each of the upper and lower flanges and the upper and lower groove walls of the annular groove 6a, the groove of the annular groove when the C-shaped rock ring is expanded and tightened. It can substantially cope with fluctuations in width, mounting distortion of the upper and lower seat rings, etc., and even if the upper seat ring 2 is tilted with respect to the lower seat ring 1 due to the load moment during cargo handling work, the telescopic boom that is fully extended The vertical displacement of the tip of 15 is small. For example, even if the maximum boom length is 50 m in the embodiment of FIG. 9, there is no practical problem since the vertical displacement of the tip is 2 cm or less.

FIG. 10 and FIG. 11 show an embodiment of the second invention,
In the drawings, members denoted by the same reference numerals as those in FIGS. 1 and 2 are corresponding members.

In this embodiment, instead of the power actuating device of the embodiment shown in FIG. 1, roller-shaped stopper members 36 and 37 which can be roll-engaged with the outside around both ends of the C-shaped rock ring 6, respectively, A plate-shaped stopper member 38 which can be slidably engaged with the outside of the center of the U-shaped rock ring is mounted on the vehicle body frame 13 symmetrically with respect to the diameter line D including the notch S, as shown in FIG. When the C-shaped rock ring is expanded and engaged with the three stop members 6, the C-shaped rock ring is radially outward from the upper and lower flanges 2a, 1a over the entire circumference. To leave.
The support portion of each stopper member is formed of a plate-like support 36a, 37a, 38a extending radially from the lower seat ring 1, and the upper surface thereof cooperates with the other plate-like supports 39, 40 to form a C-shaped rocker. The ring is slidably supported in the horizontal direction. Instead of or in addition to the stopper member 38, roller-like stopper members 41 and 42 can be mounted on the vehicle body frame as shown by a chain line in FIG.

〔The invention's effect〕

In the present invention, when the C-shaped rock ring is expanded by the telescopic cylinder, the degree of opening of the notch increases as the inner diameter of the C-shaped rock ring corresponding to the outer peripheral surface of the upper and lower seat rings or its flange increases. (E.g., in the case of an equal thickness C-shaped rock ring having a rectangular cross section, the opening of the notch is a value obtained by dividing the inner radius of the C-shaped rock ring by the radial thickness of the rectangular cross section. When the C-shaped rock ring is contracted and tightened by the telescopic cylinder, the C-shaped rock ring is positioned at the center thereof. One small-power telescopic cylinder, taking advantage of the fact that the upper and lower seat rings or the outer peripheral surface of the flange thereof can be held substantially evenly by a C-shaped rock ring because the upper and lower seat rings or the flange outer surface thereof can be held almost uniformly by the C-shaped locking ring. To open and close a large diameter C-shaped rock ring at the required opening And C along the diametrical line including the cut-out
Either a power actuating device that moves the central part of the U-shaped rock ring forward or backward, or a stopper member that positions the expanded C-shaped rock ring radially outward from the flanges of the upper and lower seat rings is mounted on the vehicle body frame. There is no danger that the weight of the machine swivel mount will increase as in the past, and the diameter of the upper and lower seat rings can be significantly increased within the range of the vehicle width, thereby dramatically improving the load lifting capacity of the work machine. The effect that can be performed.

[Brief description of the drawings]

1 is a longitudinal sectional front view of a main part of one embodiment of the present invention, FIG. 2 is a plan view of a C-shaped locking ring in a tightened state, FIG. 3 is a cross-sectional plan view of both ends thereof, FIGS. FIG. 5 is an enlarged view of the main part of FIG. 1 and a view thereof in the direction of the arrow X, and FIG.
FIG. 7 is a cross-sectional view of a main part when the C-shaped rock ring is expanded, FIG. 8 is a cross-sectional plan view of both ends of the C-shaped rock ring when the rock ring is expanded, and FIG. 9 is a side view of the truck crane. Figure, No.
FIG. 10 is a cross-sectional plan view (ZZ sectional view of FIG. 11) of another embodiment, and FIG. 11 is a WW sectional view of FIG. 10 ... work machine swivel, 12 ... car cab, 13 ... body frame, 14 ... turntable, 15 ... telescopic boom.

Claims (2)

(57) [Claims] 1. A turning operation in which a flange is integrally provided on an outer periphery of a contact portion between a lower seat ring fixed on a vehicle body frame and an upper seat ring on a working machine turning table side detachably connected to a key. In the vehicle equipped with the machine, the flanges (2a, 1a) of the upper and lower seat rings that are brought into contact with each other are provided with an annular groove (6a) inside which can be fitted with a small gap vertically, and one notch (S) C with
A slidable rock ring (6) is slidably supported on the body frame such that the annular groove faces the two flanges,
The ends of the arms (7) and (8) projecting tangentially from both ends of the C-shaped rock ring are connected by a telescoping cylinder (9) to connect the C-shaped rock ring to the upper and lower seat rings. (2,1)
And a tightening position where the inner peripheral surface of the C-shaped rock ring contacts the corresponding upper and lower seat rings or the outer peripheral surface of the flange thereof, and A power actuating device for moving the central portion of the C-shaped rock ring forward and backward along the diameter line (D) including the notch is mounted on the vehicle body frame, and the expanded C-shaped rock ring is separated radially outward from the flanges. Wherein the inner peripheral surface of the contracted C-shaped rock ring can be brought into contact with the corresponding outer peripheral surface of the upper and lower seat rings or its flange. Mounting device. 2. A swivel operation in which a flange is integrally provided on an outer periphery of an abutting portion between a lower seat ring fixed on a vehicle body frame and an upper seat ring on a side of a working machine swivel which is separably connected to a key. In the vehicle equipped with the machine, the flanges (2a, 1a) of the upper and lower seat rings that are brought into contact with each other are provided with an annular groove (6a) inside which can be fitted with a small gap vertically, and one notch (S) C with
A slidable rock ring (6) is slidably supported on the body frame such that the annular groove faces the two flanges,
The ends of the arms (7) and (8) projecting tangentially from both ends of the C-shaped rock ring are connected by a telescoping cylinder (9) to connect the C-shaped rock ring to the upper and lower seat rings. (2,1)
And a tightening position where the inner peripheral surface of the C-shaped rock ring contacts the corresponding upper and lower seat rings or the outer peripheral surface of the flange thereof, and On the diameter line (D) including the notch, a stopper member (3) that can abut and engage with the outside of the center of the expanded C-shaped rock ring.
8) and stopper members (36, 37) arranged symmetrically with respect to the diameter line (D) and capable of abuttingly engaging the outer sides near both ends of the expanded C-shaped rock ring. , C in the expanded position
A mounting device for a work implement swivel, wherein the mounting ring is mounted on a vehicle body frame such that a U-shaped rock ring is detached radially outward from the flanges.