JP7198588B2 - Actuator mounting structure and vehicle equipped with the same - Google Patents

Description

TECHNICAL FIELD The present invention relates to a mounting structure for an actuator used in hydraulic equipment or the like and a vehicle equipped with the same.

2. Description of the Related Art Conventionally, it has been widely practiced to attach an actuator having an elongated shape to a mounting object such as a wall surface with a U-bolt. For example, Patent Literature 1 discloses that a cylindrical and elongated actuator (specifically, an accumulator) is fixed by a U-bolt and a nut.

JP-A-9-27250

It is advantageous to fix the actuator by bringing the center of gravity of the actuator closer to the mounting object such as the wall surface, because it can be fixed stably. However, if this is done, the space between the portion of the U bolt where the nut is fixed and the mounting object becomes narrow, making it difficult to fasten the nut.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide an actuator mounting structure for mounting an actuator having an elongated shape to an object to be mounted, which has excellent workability, and a vehicle equipped with the same.

The present invention provides an actuator mounting structure for mounting an actuator having an elongated shape to an object to be mounted, comprising: a base fixed to the object to be mounted; A mounting aid fixed to a base, and a U-bolt for fixing the actuator to the mounting aid with a U-bolt nut, the base having a proximal end in contact with the surface of the object to be mounted. An upright portion having a top end side of the cage separated from the surface, and a support portion extending substantially parallel to the surface of the object to be attached from the top end of the upright portion, wherein the support portion includes the mounting aid. The mounting aid includes a U-bolt mounting hole through which the U-bolt penetrates at a position where the U-bolt does not interfere with the base, and a fixing portion for fixing the mounting object to the surface. and a mounting aid-side fixing portion used for fixing to the support portion at a position not overlapping the actuator when viewed side by side.

According to the above configuration, by fixing the mounting aid with the actuator fixed by the U-bolt to the base, even if the tip of the U-bolt and the surface of the mounting object are close to each other, the mounting object can be It is easy to attach the actuator to the

Furthermore, the supporting part side fixing part has a base nut which is a nut fixed to the surface of the supporting part on the mounting object side, and the mounting aid side fixing part has a base nut fixed to the mounting object side surface of the supporting part. It is a through hole through which a bolt that is screwed into the base nut by being screwed in from the side penetrates, and the U-bolt nut that is screwed into the U-bolt and the base nut are the mounting aid of the support part. Among the side surfaces, the mounting aid contact surface that contacts the mounting aid may be positioned closer to the object to be mounted than the mounting aid contact surface.

According to this configuration, by arranging the U-bolt nut screwed to the U-bolt and the base nut in the dead space that exists on the mounting object side of the support portion side surface of the mounting object side, The entire mounting structure can be made compact.

According to another aspect of the present invention, there is provided a vehicle including the mounting structure for the actuator.

According to the present invention, it is easy to attach the actuator to the object to be attached even if the tip of the U-bolt and the surface of the object to be attached are close to each other. Therefore, workability is good.

BRIEF DESCRIPTION OF THE DRAWINGS The concrete pump truck which concerns on one Embodiment of this invention is shown, (A) is a side view, (B) is a top view. The relationship between a part of the arm portion and the accumulator in the concrete pump vehicle according to the present embodiment is shown transparently around the accumulator, (A) is a plan view, and (B) is an arrow I in (A). It is the figure which notched and displayed in part. It is an exploded perspective view of the attachment structure of the accumulator which concerns on this embodiment. 8A and 8B are front views showing the shape of a base according to another embodiment of the present invention; FIG.

Next, an embodiment applied to a concrete pump vehicle B will be described for the present invention. However, the object of application of the present invention is not limited to the concrete pump vehicle B, but can be widely applied to devices using actuators having a long shape. Since the structure of the concrete pump car B is publicly known, the outline thereof will be described. As shown in FIGS. 1(A) and 1(B) (the vehicle body is indicated by a two-dot chain line), the concrete pump vehicle B is equipped with a boom B2 in which a plurality of beams B1 to B1 are bendably connected, and a chassis and the like. This vehicle is mounted on the vehicle body, and can cast ready-mixed concrete at a high place or a distant place by extending the boom B2 by means of a hydraulic cylinder. The boom B2 closest to the base end (vehicle body side) is rotatable in the horizontal direction with respect to the vehicle body. FIGS. 1A and 1B show a state in which a plurality of beams B1 to B1 are folded, the boom is closed, and the concrete pump vehicle B can run on public roads. A concrete pumping pipe B3 is provided on the side of the boom B2 (part of which penetrates the boom B2 in the width direction). The ready-mixed concrete supplied from the concrete mixer truck is supplied to the hopper B4 located behind the vehicle, and the ready-mixed concrete in the hopper B4 is sent to the concrete pumping pipe B3 by the concrete pump provided on the vehicle body side. Then, ready-mixed concrete can be discharged from the tip opening of the concrete pumping pipe B3 arranged at the placement location.

In order to support the front outrigger B5 and the rear outrigger B6 that are used by extending outward in the vehicle width direction when pouring ready-mixed concrete, an "X" shape in plan view as shown in FIG. There is provided an arm portion Y appearing at . As shown in FIGS. 2A and 2B, the arm portion Y incorporates an accumulator (pressure accumulator) X as an actuator. This accumulator X has an elongated shape, and is a device in which a reciprocating mechanism (specifically, a piston) is housed inside a case (housing, exterior, etc.). Accumulator. Specifically, the accumulator X has an elongated cylindrical shape.

Here, at the start of extension of the drive cylinder that constitutes a part of the concrete pump and is driven by hydraulic pressure, the ready-mixed concrete that has been pressure-fed collides with the ready-mixed concrete remaining inside the concrete pressure-feeding pipe B3, so that the drive cylinder A rise in hydraulic pressure (peak pressure) occurs in the oil passage. An accumulator X is used as a countermeasure against this phenomenon. By providing the accumulator X in the middle of the oil passage Z through which the hydraulic fluid discharged from the hydraulic pump is sent to the drive cylinder, the hydraulic fluid is temporarily stored in the accumulator X. Hydraulic pressure is accumulated in the accumulator X as the hydraulic oil is stored. As a result, it is possible to suppress the occurrence of the peak pressure in the oil passage Z to which the accumulator X is connected, and to suppress the occurrence of impact occurring inside the concrete pumping pipe B3 and the like.

Next, a mounting structure for mounting the accumulator X according to the present embodiment to the arm portion Y as an object to be mounted will be described. This mounting structure includes a base 1, mounting aids 2, and U-bolts 3, as shown in FIG.

The base 1 is fixed to the inner wall surface of the arm portion Y. As shown in FIG. In this embodiment, the wall surface is a plane, and the base 1 is fixed to this plane by welding. However, it is not limited to this, and can be fixed by various fixing means such as bolts. The base 1 has an upright portion 11 and a support portion 12 . The upright portion 11 is provided at a position where the proximal end side is in contact with the surface of the arm portion Y and the distal end side is separated from the surface. The base end side is welded to the surface of the arm portion Y. The support portion 12 is provided so as to extend substantially parallel to the surface of the arm portion Y from the tip of the standing portion 11 . The base 1 of the present embodiment is made of a channel material having a length corresponding to the longitudinal dimension of the accumulator X (not limited to commonly available channel materials, but also including those obtained by bending a flat plate into a "U" shape). The flange portion of the channel material is used as the standing portion 11 and the web portion is used as the support portion 12 . Since it is a channel material, two upright portions 11 are provided, each of which is a plate-like portion orthogonal to the surface of the arm portion Y. As shown in FIG. The supporting portion 12 is a plate-shaped portion that connects the ends of the two standing portions 11 and is horizontal in FIG. A long hole 14 is formed in the support portion 12 for weight reduction. However, this long hole 14 may be omitted.

The support portion 12 is provided with a support portion-side fixing portion 13 for fixing the mounting aid 2 . The support portion-side fixing portion 13 includes a support portion through hole 131 and a nut fixed so as to match the support portion through hole 131 on the surface of the support portion 12 on the surface side of the arm portion Y (lower surface in FIG. 3). and a base nut 132 which is In this embodiment, the base nut 132 is fixed by welding. However, it is not limited to this, and can be fixed by various fixing means such as a separately provided fixing metal fitting. Furthermore, the support portion through-hole 131 having a screw hole may also serve as the base nut 132 . The support part-side fixing part 13 is provided at two positions side by side in the width direction at both ends in the longitudinal direction. As shown in FIG. 3, a bolt 4 (only one portion (one piece) is shown in FIG. 3) is inserted into the supporting portion-side fixing portion 13 from above while the mounting aid 2 is superimposed on the base 1. By screwing this bolt 4 into the base nut 132 , the mounting aid 2 is fixed to the support portion 12 of the base 1 .

The mounting aid 2 is interposed between the base 1 and the accumulator X (in this embodiment, vertically in FIG. 3) and fixed to the base 1 . In this embodiment, it is fixed by bolting as described above. The longitudinal dimension of the mounting aid 2 substantially matches the longitudinal dimension of the base 1 . The mounting aid 2 is formed by bending a plate-like body such as a steel plate, for example, and fixing another member by welding or the like. As with the base 1, a channel material can also be used for the attachment aid 2. FIG. This mounting aid 2 has a base portion 21 that abuts on the support portion 12 of the base 1 . Moreover, it is separate from the base portion 21 and has branch portions 22 protruding in the width direction of the base portion 21 near both ends in the longitudinal direction of the base portion 21 . Note that the base portion 21 and the branch portion 22 can also be formed integrally. The branches 22 of this embodiment protrude in a direction perpendicular to the longitudinal direction of the base 21 .

Mounting aids used for fixing to the support portion 12 are provided at both ends of the base portion 21 in the longitudinal direction at positions corresponding to the support portion-side fixing portions 13 when the mounting aid 2 is superimposed on the base 1 . A base portion through-hole 23 is provided as an implement-side fixing portion. The base through hole 23 is a hole through which the bolt 4 that is screwed into the base nut 132 by being screwed from the opposite side of the arm portion Y (upper side in FIG. 3) passes. The base through-hole 23 is provided at a position not overlapping the accumulator X in plan view in FIG. Therefore, when screwing the bolt 4, the accumulator X is less likely to be caught by a screwing tool or a worker's hand, which facilitates the work. A long hole 25 is formed in the base 21 for weight reduction. However, this long hole 25 may be omitted. Further, the central side of the base portion 21 in the longitudinal direction with respect to the branch portion 22 is reinforced by making the cross-sectional shape U-shaped. However, it is also possible to bear the strength exclusively with the accumulator X and form the base portion 21 in a flat plate shape. Further, it is also possible to reinforce the base portion 21 by forming a ridge extending in the longitudinal direction by press molding or the like.

Each branch portion 22 has flange portions 221 raised on both sides in the width direction, and has a U-shaped cross section. A curved concave portion 222 into which a part of the accumulator X is fitted is formed in the flange portion 221 on the central side in the longitudinal direction of the mounting aid 2 . The curvature of the curved portion of the concave portion 222 substantially matches the curvature of the side surface of the accumulator X. As shown in FIG. In addition to the concave portion 222, a concave portion 222 may be further provided in the flange portion 221 on the end portion side in the longitudinal direction of the mounting aid 2. As shown in FIG. By doing so, each branch portion 22 can be brought into contact with the accumulator X at two locations.

On the other hand, in the present embodiment, the concave portion 222 is not provided in the flange portion 221 on the end side in the longitudinal direction of the mounting aid 2, and the upper edge is a high portion 223 having a horizontal edge. The high portion 223 is positioned higher than the recess 222 . By using the branch portion 22 having such a shape, even if the accumulator X tends to be displaced in the longitudinal direction due to the influence of vehicle vibration or the like, the accumulator X abuts against the high portion 223, so that the accumulator X is moved toward the ends in the longitudinal direction. It is possible to prevent the accumulator X from being detached from the U bolt 3 by further shifting to the end side from the flange portion 221 in .

A branch through-hole 24 as a U-bolt mounting hole is provided at the longitudinal end of each branch 22 . The U-bolt 3 passes through the branch through-hole 24 . The penetration of the U-bolt 3 is performed at a position that does not interfere with the base 1, specifically, outside the widthwise edge of the base 1 in plan view.

The U-bolt 3 fixes the accumulator X to the mounting aid 2 . This fixation is performed by hooking the curved portion 31 of the U-bolt 3 on the side opposite to the mounting aid 2 of the accumulator X while the accumulator X is in contact with the concave portion 222 of the branch portion 22 of the mounting aid 2. A U-bolt nut 5 is screwed from below the branch portion 22 into the screw portions 32 at both ends of the through hole 24 to fix the branch portion 22 .

According to the mounting structure of this embodiment configured as described above, the mounting aid 2 with the accumulator X fixed in advance by the U-bolts 3 can be fixed to the base 1 . Therefore, it is possible to fix the accumulator X to the mounting aid 2 at a place where the work is easy to do. Therefore, the tip of the U-bolt 3 and the wall surface of the arm portion Y are close to each other, and the accumulator X can be easily attached to the arm portion Y even if the positional relationship is poor in workability.

Also, the position where the accumulator X is fixed can be brought closer to the wall surface of the arm portion Y. That is, the accumulator X can be fixed at a low position with respect to the wall surface of the arm portion Y. Therefore, the labor required for lifting the accumulator X by the operator can be reduced.

Further, the U-bolt nut 5 screwed to the U-bolt 3 and the base nut 132 are mounting aids that actually contact the mounting aid 2 on the surface (upper surface) of the support portion 12 on the mounting aid 2 side. It is positioned further below the implement contact surface 121 . By disposing the U-bolt nut 5 screwed to the U-bolt 3 and the base nut 132 in the dead space existing below the lower surface of the support portion 12 in this way, the dead space is filled with the accumulator X. Since it can be effectively used for fixing and fixing the mounting aid 2, the entire mounting structure can be made compact.

As described above, the present invention has been described by taking up an embodiment, but the present invention is not limited to this embodiment. For example, the actuator is an accumulator (pressure accumulator) X that can temporarily hold the hydraulic pressure of hydraulic oil in the above embodiment, but is not limited to this, and various devices that input and output energy are applicable.

The concepts involved in actuators in the present invention will now be explained in a little more detail. The "actuator" in the present invention is a fluid pressure device, or a device (operating mechanism built-in device) in which a mechanism for performing a predetermined operation is housed inside a case (housing, exterior, etc.), or a fluid pressure device, and , a device (fluid pressure device with a built-in operating mechanism) in which a mechanism for performing a predetermined operation is housed inside a case. Further, as the predetermined motion, a reciprocating motion or a rotary motion can be exemplified.

The actuator to which the present invention is applied is preferably a device that performs reciprocating motion as in the above embodiment. In this case, by fixing the device with the U bolt, even if the object to be attached is distorted (curved, etc.), this distortion is not directly transmitted to the actuator, and the U bolt and the actuator do not perform the reciprocating motion. The displacement in the direction (that is, the longitudinal direction) avoids deformation of the actuator itself. Therefore, it is possible to prevent the reciprocating motion from being hindered due to bending or deviation of the shaft related to the reciprocating motion.

Further, examples of fluid pressure devices (reciprocating fluid pressure devices) that perform reciprocating motion include the accumulator (pressure accumulator) X and cylinders (hydraulic cylinders and pneumatic cylinders) according to the above embodiments.

In addition, although the base 1 is a single elongated body (specifically, a channel material) in the above embodiment, for example, it may be divided into a plurality of pieces corresponding to the number of U-bolts 3 used for attachment. good. In addition to the channel material in the above embodiment, various materials such as angle material can be used.

In addition, at least the portion of the support portion 12 of the base 1 that abuts on the mounting aid 2 should have a shape corresponding to the mounting aid 2 . In the above-described embodiment, as shown in FIG. 3, the upper surface of the supporting portion 12 and the lower surface of the mounting aid 2 are all flat surfaces. However, it is not limited to this, and it is sufficient that the peripheral portions of the supporting portion-side fixing portion 13 and the mounting aid-side fixing portion (base through-hole) 23 correspond to each other.

Further, the combination of the supporting part side fixing part 13 and the mounting aid side fixing part 23 can be configured in various ways. For example, as shown in FIG. 4A, a base nut 132 may be fixed to the upper surface of the horizontal portion of the base 1. As shown in FIG. Alternatively, as shown in FIG. 4B, a recess 15 may be formed in the support portion 12 of the base 1 by press molding or the like, and the base nut 132 may be fixed to the recess 15 . Further, the supporting part side fixing part 13 and the mounting aid side fixing part 23 can be fixed by clip-like or clamp-like metal fittings that can be sandwiched from the longitudinal direction outside of the base 1 and the mounting aid.

Moreover, the U-bolt 3 is not limited to the general shape shown in FIG. In addition to the "U" shape, a substantially "U" shape may also be used. Also, in the above embodiment, two U-bolts 3 are used for one accumulator X, but the number of U-bolts 3 to be used is not particularly limited.

Reference Signs List 1 base 11 standing portion 12 support portion 121 mounting aid contact surface 13 support portion side fixing portion 132 base nut 2 mounting aid 21 base portion 22 branch portion 23 mounting aid side fixing portion, base through hole 24 U bolt mounting hole, Branch through-hole 3 U-bolt 4 Bolt 5 U-bolt nut X Actuator, accumulator Y Mounting object, arm

Claims (3)

An actuator mounting structure for mounting an actuator having a long shape to an object to be mounted,
The actuator is a fluid pressure device incorporating an operating mechanism operated by fluid pressure,
a base fixed to the object to be attached;
a mounting aid interposed between the base and the actuator and fixed to the base;
a U-bolt for fixing the actuator to the mounting aid with a U-bolt nut;
The base includes an upright portion having a proximal end in contact with the surface of the object to be attached and a distal end at a fixed position away from the surface, and a tip of the upright portion substantially parallel to the surface of the object to be attached. a support extending to
The support portion is provided with a support portion-side fixing portion for fixing the mounting aid,
The mounting aid includes a U-bolt mounting hole through which the U-bolt penetrates the base at a position where the U-bolt does not interfere with the base, and a position where the actuator does not overlap when viewed directly on the surface of the object to be mounted. and a mounting aid side fixing portion used for fixing the
The mounting aid has a base portion attached to the base and a branch portion protruding from the base portion and positioned outside the edge of the base, and the U-bolt mounting hole is provided in the branch portion. and
An actuator mounting structure in which the tip of the U bolt faces a surface of the mounting object in the axial direction of the U bolt . The support part side fixing part has a base nut which is a nut fixed to the surface of the support part on the mounting object side,
The mounting aid side fixing portion is a through hole through which a bolt that is screwed into the base nut by being screwed from the opposite side of the mounting object passes through,
The U-bolt nut screwed onto the U-bolt and the base nut are positioned further than the mounting aid contact surface that abuts the mounting aid among the surfaces of the support portion on the mounting aid side. 2. The mounting structure for an actuator according to claim 1, located on the mounting object side. A vehicle comprising the actuator mounting structure according to claim 1 or 2.

Images