JPH04129681A - Servo hydraulic cylinder device for civil work - Google Patents

Abstract

PURPOSE:To lighten the device weight and to facilitate movement and installation by fitting a servo hydraulic cylinder with its fixing to a frame, and fitting the driving object of a civil work tool, etc., to the piston rod tip of the servo hydraulic cylinder via a slider installed freely slidably on the frame. CONSTITUTION:A servohydraulic cylinder 1 provided so as to control the reciprocating speed, stroke and power of a piston rod 1a by a servocontrol unit equipped with a servovalve is installed with its fixing to a frame 4. Moreover the driving object 6 of a tool, etc., for civil work is fitted to the piston rod 1a tip of this servohydraulic cylinder 1 via a slider 5 installed freely slidably on the frame 4.

Description

Detailed Description of the Invention ■)...Industrial Application Field The present invention is mainly used in civil engineering work to partially or completely destroy concrete structures, roads, etc., crush and excavate asphalt roads, and It is a type of power engine used for excavating, scraping, polling, cutting and pulling out reinforcing bars, etc. It uses a servo hydraulic cylinder as the power source and controls the reciprocating movement of its piston rod to perform civil engineering work. The signal is transmitted to the driven object such as various tools, thereby performing the action such as breaking the concrete, etc.
This relates to a servo hydraulic cylinder device for civil engineering work.

■)...Prior art and its challenges In various civil engineering works, (1)...Partial or total destruction of concrete buildings, roads, etc., crushing and excavation of asphalt roads, excavation and excavation of the ground, etc. Air hammers and hydraulic hammers are mainly used for construction work, but these have the following problems.

(i) Since these hammer-type devices use the reaction force of compressed gas such as nitrogen as a power source, it is necessary to prepare and manage high-pressure gas cylinders, and a great deal of effort is required to ensure that their use is not dangerous. Requires attention and is cumbersome.

(ii) The vibration and noise during operation are large, making it unsuitable for urban areas or nighttime construction.

(ij) During operation, it is necessary to press the hammer perpendicularly to the object at all times, making it difficult to control the power, making it difficult to perform delicate work, and furthermore making it difficult to operate and inexperienced. If used by someone else, it may lead to unexpected destruction or work failure, and there are many dangers that may lead to accidents.

(iν) These hammers are only used for changing hammers by vibration, cannot reciprocate, and have no pulling force at all.Therefore, they cannot perform work such as cutting and pulling out reinforcing bars that come out when concrete is broken. , special tools were required, which hindered the improvement of work efficiency.

(2)...Also, for ground, mountain retaining, anchor bolt holes, etc. drilling and poling work, there are two methods: impact-type equipment such as air hammers and hydraulic hammers, and rotary methods that use drilling rods and pipes. (i) Air hammers and hydraulic hammers are heavy, so they are difficult to move and install, for example, for heaping on sites with poor terrain such as sloping ground, cutting down anchor bolt holes, etc., and for poling work. This makes construction work particularly difficult when manual labor is required to move and install the system.

(ii), (ii), (iii) of (1) above, (lν
), there is a lot of vibration and noise, and delicate power control is not possible, so no force is applied in the lifting direction.

(iii) a reduction rod due to the impact force of the hammer;
The impact force is absorbed by the buckling and vibration of the pipe, and the impact force is not sufficiently transmitted to the tip bit, so it cannot support long-distance milling and polling.

(iν) In the case of rotary equipment, for example, if there is a hard part or rock in the ground, rotary cutting alone often stops there, so equipment that has both rotational force and impact force is desired. Ta.

■)...Object of the present invention (1)...The present invention solves the above-mentioned conventional problems, has low construction noise and vibration, has flexible power control, and is therefore capable of delicate work, handling and management. The present invention aims to provide a servo-hydraulic cylinder device for civil engineering work, which is easy to move and install manually, and is capable of long-distance excavation and polling.

■)...Means for solving RB The present invention uses a servo control unit equipped with a servo valve to control the speed, speed, and speed of the reciprocating movement of the piston rod.
A servo hydraulic cylinder installed to control the stroke and power is fixedly installed on the pedestal, and a driven object such as a civil engineering tool is installed at the tip of the piston rod of the servo hydraulic cylinder so that it can slide freely on the pedestal. This problem has been solved by a servo hydraulic cylinder device for civil engineering work, which is characterized in that it is installed via a slider.

■)...Example Hereinafter, the present invention will be explained in detail with reference to the drawings.

``Example IJ Configuration...The example shown in Figure 1 is a servo control unit (not shown) consisting of a servo valve, a servo pulp drive servo amplifier, a differential transformer, an amplifier for the differential transformer, a function generator, etc. A servo hydraulic cylinder 1 of an existing configuration, which is installed to control the speed, stroke, and power of the piston rod 1a, is attached to the lower surface of the upper plate 2 of the pedestal 4 with the guide rod 3 established between the upper and lower plates 2 and 2'. The tip of the piston rod 1a of the servo hydraulic cylinder 1 is connected to a rectangular plate-shaped slider 5, and the side part of the slider 5 is slidably inserted into the guide rod 3, and the lower surface of the slider 5 is fixedly installed. A servo-hydraulic cylinder device A for civil engineering work is constructed by attaching a driving object 6, in this embodiment a civil engineering tool 6 shaped like a chisel, ripper, or bell shape.

The civil engineering tool 6 shown in the figure is a special tool formed in accordance with the function of the device of the present invention, and the tool shown in Figures 1 and 2 has a chisel-shaped tip so that it can be used as a saw and a hammer. The shaft portion has irregularities formed on its circumferential surface. Also, the third
The one shown has a bell-shaped tip.

Action: When the servo control unit supplies oil to the servo hydraulic cylinder 1, its piston rod 1a reciprocates, the slider 5 reciprocates on the guide rod 3, and the civil engineering tool 6 attached to it reciprocates. .

Depending on the purpose of construction, the speed of the reciprocating motion may be controlled to tymm, for example, 10 to 20 reciprocations/sec, to produce a continuous striking motion similar to vibration, or to slow pushing and pulling.

In addition, the stroke of the reciprocating movement of the piston rod 1a is controlled according to the purpose 2, and the power of the reciprocating movement is controlled in intensity according to the hardness of the object to be destroyed, as well as the speed and stroke described above.

The tool 6 shown in Figure 1.2 can be used to destroy, similar to a conventional hammer.
In addition to excavating, the saw and the reciprocating movement of the single-shaped irregularities cut reinforcing bars and the like.

Further, the bell-shaped tool 6 shown in the third figure is used for tamping down the bank surface and the like.

Note that the civil engineering tool used as the object to be driven is not limited to the upper side, but may be any tool similar to a conventional ripper or a special tool for this device.For example, since this device also has a pulling force, A hook-like extraction tool or the like may also be used.

Effect (1): The speed, stroke, and power of the servo hydraulic cylinder can be freely controlled even from a remote point using the servo control unit, so it can quickly respond to on-site conditions, and can be used with extreme accuracy, even when dealing with items that require enormous destructive force. We can also handle construction work that requires delicate work.
Therefore, since it does not use more force than necessary, it has less impact on the surroundings, and it does not cause unexpected failure or destruction.

(2) Since it can be constructed to be lightweight and compact, it can be moved and installed manually and is easy to handle, and in terms of management, there is no need for dangerous and troublesome items such as gas cylinders.

(3) Since construction noise and vibration are low, it can be used in urban areas and during night-time construction.

(4) Utilizing the reciprocating motion of the piston rod, a powerful force can be obtained both by pushing and pulling, so not only can destruction be done by impact, but also cutting tools such as saws and furnaces can be used. It is an excellent product that can be used for a variety of construction purposes by attaching a tool like a trowel to compaction work for bank surfaces, which has traditionally been done manually, by replacing the tool as the driven object depending on the purpose. It has some characteristics.

rEmbodiment 21 Configuration: A servo hydraulic cylinder 1 is fixedly installed on the lower surface of the upper plate 2 of a pedestal 4 with a guide rod 3 established between the upper and lower plates 2 and 2', and the piston rod la of the servo hydraulic cylinder 1
A cutting bit 6b whose tip is connected to a rectangular slider 5, a side part of the slider 5 is slidably inserted into the guide rod 3, and is rotationally driven to the slider 5 by a motor 7 via a transmission gear. It is equipped with a gear A' for rotation and a gear B' for rotating the sheath pipe bit 60. A cutting bit 6b is attached to the gear A' via a connecting rod b', and the sheath pipe 6 is connected to the gear B'.
A servo-hydraulic cylinder device A for civil engineering work is constructed by attaching a sheath pipe (pi) 6c via c' with a connecting rod 6b and a cutting bit 6b' inserted into the sheath pipe 6C26c'. be. Reference numeral 8 denotes a water supply (air) hole through which water (or air) is supplied during excavation poling.

Action: When the servo hydraulic cylinder 1 is operated by the servo control unit, the piston rod 1
The slider 5 connected to the slider 5 reciprocates, and the connecting rod 6b', the cutting pin 6b, the connecting sheath pipe 6c', and the sheath pipe 6c attached to the slider 5 reciprocate, and the impact and pressing force causes the slider 5 to reciprocate. At the same time, the gear A'B' is rotationally driven by the motor 7, so that the connecting rod 6b', the scraping bit 6b and the connecting sheath pipe 6c are milled and polled.
', sheath pipe pin) 6c is rotationally driven, and both pins 1-6b
, 6c are rotated and polling is performed.

As the cutting and polling progresses, the connecting rod 6
b' and the connecting sheath pipe 6c' are successively connected to increase the cutting and polling distance.

Effect (1): By using a servo hydraulic cylinder, the weight is approximately 1/10 compared to conventional equipment, making it easier to move and install manually, which was previously difficult.
It has also become possible to carry out construction work on sites with poor footing.

(2) In addition to being able to freely control the speed, stroke, and power of the servo hydraulic cylinder, rotary force is also applied at the same time as the impact force generated by reciprocating motion, so it can quickly respond to any ground and excavate efficiently. , polling is possible.

In addition, since the reciprocating motion can act in both push and pull, even if the rod and sheath tube are connected for a long time and the weight changes, the entire rod can be operated reliably, and the force is directly transmitted to the bit at the tip. This enables long-distance excavation and polling.

(3) Since it is not a hammer type, the sound is low.

(4) Due to the above, it is difficult to stop the mountain, which was difficult in the past.
It has an excellent feature that allows construction to be performed easily and reliably in difficult locations such as anchor bolt holes.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram of the configuration of an embodiment of the present invention in which a civil engineering work tool is attached as an object to be driven, Figs. FIG. 2 is a schematic configuration diagram of an embodiment of the present invention in which an advance bit and a sheath pipe bit are attached. Number A...device of the present invention, A'B'...gear, 1...
・Servo hydraulic cylinder 1a...piston rod,
2... Upper plate, 2'... Lower plate, 3... Guide rod,
4... Frame, 5... Slider 6... Object to be driven (civil engineering work tool 6a, cutting bit 6b, connecting rod 6b', sheath pipe bit 6c, connecting sheath pipe 6c')? ...Motor 8...Water supply (air) hole. Figure 1

Claims (3)

[Claims] (1) A servo hydraulic cylinder provided to control the speed, stroke and power of reciprocating movement of a piston rod by a servo control unit equipped with a servo valve is fixedly installed on a mount, and the piston of the servo hydraulic cylinder A servo hydraulic cylinder device for civil engineering work, characterized in that a driven object such as a tool for civil engineering work is attached to the tip of a rod via a slider that is slidably installed on a mount. (2) A servo hydraulic cylinder is fixedly installed on the lower surface of the upper plate of a mount with a guide rod established between the upper and lower plates, the piston rod tip of the servo hydraulic cylinder is connected to a slider, and the side part of the slider is connected to the guide rod. 2. The servo hydraulic cylinder device for civil engineering work according to claim 1, wherein the servo hydraulic cylinder device for civil engineering work is slidably inserted into the slider, and a ripper-like or other civil engineering tool is attached to the lower surface of the slider. (3) A servo hydraulic cylinder is fixedly installed on the lower surface of the upper plate of the mount with a guide rod established between the upper and lower plates, the piston rod tip of the servo hydraulic cylinder is connected to a slider, and the side part of the slider is connected to the guide rod. A gear A' for rotating the cutting bit, which is slidably inserted into the slider and driven by the motor of the slider, and a gear B' for rotating the sheath pipe bit. The gear bit is attached to the gear B' through a connecting sheath tube, and the sheath tube bit is attached with the connecting rod and the cutting bit inserted into the sheath tube. Servo hydraulic cylinder device for civil engineering work.