JPS6053121B2 - Impact work machine - Google Patents

Description

[Detailed Description of the Invention] The present invention can be used as a breaker for crushing paved surfaces by attaching a bit as an attachment, or as a compaction machine for compacting the ground by attaching a pressure plate as an attachment. The present invention relates to a striking work machine for the purpose of continuous striking work using a power tool that can be used to perform continuous striking work.

As is well known, breakers have been known for a long time as working machines for crushing asphalt pavement surfaces and concrete structures.

A tamping glammer is also known as a working machine for compacting the ground after repair work for buried objects such as gas pipes and water pipes is completed. The difference is that a breaker uses compression air as its power source, while a tamping rammer uses an internal combustion engine as its power source, but these working machines have bits and pressure plates as working tools that are continuous. It is mutual in that it performs up and down reciprocating motion and hits the ground etc.! have something in common. Therefore, as far as the common points between the two are concerned, if a work tool such as a bit or a pressure plate can be attached as an exchangeable attachment to a work machine body that has a simple power source such as an internal combustion engine, it will eventually become possible. It can be used as an economical working machine that can be shared with other workers. The problem in this case is that both conventional breakers and tamping rammers require the operator to support the aircraft during work, which requires considerable effort to move the aircraft before and after work. be.

In addition, in order to obtain an economical impact working machine in which the working tools can be replaced in one working machine body as described above,
It is necessary to be able to easily replace a work tool while supporting a heavy work machine main body without using the force of an operator. In order to satisfy these conditions, the heavy work equipment must be stably supported by supporting legs with wheels, etc., not only during work, but also when not working. It is desirable to be able to move it. In view of the above-mentioned reasons, the first object of the present invention is to attach a working tool such as a bit or a pressure plate to a working machine body powered by an internal combustion engine so that it can be replaced as necessary. The object of the present invention is to provide a rational working machine that can be used for multiple work purposes as an impact working machine. Moreover, the second object of the present invention is to
In order to facilitate the handling of work tools such as those mentioned above and the movement of the machine body, the machine body is equipped with supporting legs that are equipped with wheels and can bend and extend as a whole. The object of the present invention is to provide an impact working machine with supporting legs that allows smooth changes in the position of the machine body as it advances. Next, the impact working machine according to the present invention will be described in detail based on the illustrated embodiment. FIG. 1 shows a side view of the working machine used as a breaker, and FIG. 2 shows a rear view.

The fuselage consists of an engine 1 as a power source, a transmission 2 integrally provided on the back of the engine, and a cylinder 3 extending vertically downward from the transmission to generate vertical reciprocating motion. A bit 4 as a working tool attachment is inserted into the lower end of 3. On both sides of the mission 2, there are a pair of upper link arms 6, 7, a pair of lower link arms 8, 9 rotatably connected to the upper link arms 6, 7, and a pair of lower link arms 8, 9. A flexible support leg 5 consisting of a wheel 10 pivotally supported at the lower end of the transmission unit 2 is provided to support the transmission 2 and the engine 1. Basically the aircraft has 10 wheels.
If the aircraft is supported by the bending/extending support legs 5 with It is preferable that the power be transmitted to the wheels 10 via the power source to enable power running.

Therefore, as shown in FIG. 2, the upper ends of the upper link arms 6 and 7 of this bending/extending support leg 5 are rotatably connected to the case 11 of the mission 2, and the pivoting portion of the upper link arm 6 on one side is The shaft end of the traveling output shaft 12 inside the transmission 2 is projected outward, and a sprocket 13 is provided on the shaft end.

The lower end of a piston rod 15 of a hydraulic cylinder 14 whose upper end is pivotally connected to the side surface of the transmission 2 is connected to the upper side of the other upper link arm 7 . In addition, the upper end of both lower link arms 8 and 9 is the upper link arm 6.
, 7, but as shown in FIG. In this state, a rotary shaft 19 having sprockets 16, 17, and 18 is rotatably mounted coaxially with the pivot portion.

In addition, sprockets 2 are attached to the lower ends of the lower link arms 8 and 9.
The axles 24, 25 of the wheels 10 having the numbers 0, 21 are mounted. A chain 26 is attached to the sprocket 16 of the rotating shaft 19 and the sprocket 13 at the upper pivot point of the upper link arm 6, a chain 27 is attached to the sprocket 17 of the rotating shaft 19 and the sprocket 20 of the axle 24, and a chain 27 is attached to the sprocket 18 of the rotating shaft 19 and the axle 25. Chains 28 are interposed between the sprockets 21 and the sprockets 21, respectively, and the rotation axis of the traveling output shaft 12 of the transmission 2 is transmitted to the wheels 10. A restraint link 29 is connected between the upper end of one of the lower link arms 9 and the front of the mission 2, allowing free movement of the lower link arms 8, 9 which are pivotally connected to the upper link arms 6, 7. It is becoming more and more restrictive.

Note that the connecting portion 30 of this restraining link 29 with the mission 2
is set so that it can be replaced with another upper connecting portion 31 as needed. An auxiliary wheel 32 is provided in front of the wheel 10 on the lower link arm 9.

This auxiliary wheel 32 has a shaft 34 attached to the middle part of the lower link arm 9.
A tension spring 35 provided on the lower link arm 9 is interposed at the upper end of the auxiliary leg 33, and the auxiliary wheel 32 is supported by the tension spring. 35
A pressing force in the direction of contact with the ground is always applied due to the tension. Of course, a recess 36 is provided on the lower side of the upper end of the auxiliary leg 33, and the lower link arm 9
A stopper pin 37 protrudes from the side surface of the recess 36 and is engaged with the lower end of the recess 36 to prevent rotation toward the ground beyond a certain angle. It's getting old. The mechanism of mission 2 is constructed as shown in FIGS. 3 to 5.

As shown in Fig. 3, the engine drive shaft 3 is located inside the mission 2.
8 extends, and an axis 3 parallel to this drive shaft 38.
9 and 40 are mounted on shafts. The shaft 39 rotates when the gear 41 meshes with the gear 42 of the drive shaft 38.
9 has a clutch 43 and a worm 44, and when the clutch 43 is operated, the rotation of the drive shaft 38 is transmitted to or interrupted by the worm 44. A worm wheel 45 that meshes with the worm 44 has gears 46 and 47 on the same axis as shown in FIG. Engine driving force is transmitted to the traveling output shaft 12 by meshing. Note that the gear 47 is the traveling output shaft 12.
The clutch 51 meshes with another gear 49 via a reverse gear 50, and by operating the clutch 51, the forward and backward running force of the wheels 10 is obtained. Another shaft 40 arranged parallel to the drive shaft 38 is a gear 5
2 is rotated by meshing with the gear 53 of the drive shaft 38, and includes a clutch 54 and a gear 55.

As shown in FIG. 4, a crank 5 is attached to one end of the shaft 40 on the side.
A further shaft 56 with 8 is mounted in parallel, this shaft 5
The gear 57 of No. 6 meshes with the gear 55 on the shaft 40 and is rotated. As shown in FIG. 6, the cylinder 3 is provided below the crank 58 of this shaft 56, and the upper end of the piston rod 62 of the piston 61 inserted into the bottomed striker 60 housed in the cylinder 3 It is connected to a crankshaft 59 of the crank 58. The outer circumferential surface of the piston 61 slides in close contact with the inner circumferential surface of the striker 60, and therefore, the striker 60 moves up and down within the cylinder 3 as the piston 61 moves up and down. A bit 4 as a working tool is struck with a hammer 63, and this hammer 63 is inserted into the lower end of the cylinder 3.
convey the blow to. As shown in FIG. 3, a hydraulic pump 65 is disposed above the shaft 40 having a clutch 54, and when the gear 67 of the pump shaft 66 meshes with the gear 52 of the shaft 40, the hydraulic pump 65 rotates, and the hydraulic pump 65 rotates. The required valve mechanism 68
The hydraulic pump 14 for bending and extending the supporting leg 5 is supplied through the hydraulic pump 14 for bending and extending the supporting leg 5.

In the figure, 69 is an operating handle connected and supported to the transmission 2 via vibration isolating means, 70 is a lever for bending and extending the bending/extending support leg 5, 71 is a lever for operating the wheels 10 forward/backward and in neutral, and 72 is a power tool. This is a lever for operating and stopping the operation.
When moving the working machine according to the present invention to a work site, first, the piston rod 15 of the hydraulic cylinder 14 is extended by operating the bending/extending operation lever 70 of the bending/extending support leg 5.
Stretch downward and support the work machine to a height where the bit 4 does not touch the ground.

Next, by operating the lever 71, the rotation of the traveling output shaft 12 in the mission 2 is transmitted to the wheels 10 via the rotational force transmission means consisting of the sprocket and chain in the supporting leg 5, and the aircraft is moved. When arriving at the work site, the machine stops moving by operating the lever 71, and then operates the lever 72 to replace the power of the engine 1 with the rotation of the crank in the mission 2.
The piston 61 in the cylinder 3 is operated to apply a striking impact to the bit 4 as a working tool.

At the same time as the bit 4 starts hitting, the lever 70 is slowly operated to return the pressure oil in the hydraulic cylinder 14 into the machine, thereby retracting the piston rod 15, and as shown in FIG. The wheel 10 is raised by bending it so that the angle becomes deeper. The wheel 10 is raised by bending the support leg 5 as the bit 4 excavates. It is carried out slowly. Therefore, even during excavation and crushing work, the machine body is stably supported vertically by the wheels touching the ground, and the worker can perform the work by simply placing his hand lightly on the handle 69. When the wheel 10 rises due to the bending and bending of the bending/extending support leg 5 during this crushing operation, the angle of the auxiliary leg 33 of the auxiliary wheel 32 with respect to the lower link arm 9 changes against the tensile force of the tension spring 35. The auxiliary wheel 32 is rotated about the shaft 34 so as to maintain its contact with the ground.

However, when the focus 4 is driven in just before reaching the predetermined depth, the auxiliary leg 33, which continues to rotate as described above, hits the stopper of the lower link 9 of the supporting leg at the upper end of the recess 36, as shown in FIG. The pin 37 is locked), and the auxiliary leg 33 no longer rotates. On the other hand, the wheel 10 continues to rise due to the bending of the support leg 5 until the bit 4 reaches a predetermined depth. Therefore, even though the wheels 10 rise, the auxiliary wheels 32 that have stopped rotating are in contact with the ground, so the aircraft tilts backwards due to its own weight, and the bit 4 pries up and crushes the asphalt, etc. in front.) Become. This crushing of asphalt, etc. by tilting the bit is the same as in the case of a general-purpose breaker, where the bit is driven to a predetermined depth, and then the worker intentionally tilts the machine to J to crush the driven surface with the bit. Therefore, in the working machine according to the present invention, by fixing the auxiliary wheels 32, there is no need for the worker to take the trouble of tilting the machine body, and the machine body can automatically tilt to perform crushing. FIG. 9 shows another embodiment, in which the bit replacement warm pressure plate 7 is used as a working tool.
3 is installed and the machine is used as a compaction machine.

In this usage example, the piston rod 15 of the hydraulic cylinder 14 is retracted with the connecting portion 30 of the restraint link 29 on the lower link arm 9 of the support leg connected to the mission 2 being replaced with the connecting portion 31 on the upper side. As a result, the lower link arm 8, which corresponds to the inclination angle of the upper link arms 6, 7,
Unlike when used as a breaker, the angle of inclination of the wheel 10 is almost vertical (S), and the wheel 10 is located at the front of the fuselage, that is, directly below the engine 1. Therefore, if the impact force in the cylinder 3 is applied to the road pressure plate 73 as a work tool while transmitting forward or backward running rotational force to the wheels 10 in such a state of the aircraft attitude, the aircraft will move by the wheels 10. Then, the ground is compacted using the pressure plate 72). In addition to being used as the breaker and compaction machine shown in the above embodiments, the working machine of this invention can also be used as a working tool such as an excavator by attaching a scoop, or a cutting machine by attaching a cutter. It can be applied to various types of work equipment.

The work machine according to the present invention can be used for multipurpose work on a saw table by attaching and detaching the breaker bit or warm pressure plate as an attachment depending on the purpose of the work as described above.
In addition, this aircraft is supported by a bending and extending support leg consisting of a vertical link arm with wheels at the lower end, and this support leg can be freely bent and extended by a restraint link and a hydraulic cylinder, making it possible for this type of heavy aircraft to Not only can the machine be moved, but the machine body can be stably supported during work, and work can be performed safely and efficiently.

In addition, the bending and extending support legs that support the aircraft can transmit power from the mission to the wheels at the lower end of the support legs using rotational force transmission means such as sprockets and chains, so the power can be used to move the aircraft, allowing for mobile transportation. It has the advantage of being easy to perform. Furthermore, by providing auxiliary wheels on the bending/extending support legs, stable support of the aircraft can be expected, and by regulating the rotation angle of the auxiliary wheels within a predetermined range, the aircraft can be easily operated during work. has.

[Brief explanation of drawings]

Fig. 1 is a side view of the working machine according to the present invention when used as a breaker, Fig. 2 is a rear view with a portion cut longitudinally to show the internal structure, and Fig. 3 is - 4 is a sectional view taken along the line ■-■ in FIG. 1, FIG. 5 is a sectional view taken along the line ■-■ in FIG.
The figure is a sectional view taken along the ■-■ line in Figure 2, Figures 7 and 8.
The figure is a side view in a state of use, and FIG. 9 is a side view showing another embodiment. In the figure, 1...Engine, 2...Mission, 3...Cylinder, 4...Zet, 5...Bending/extending support leg, 6,7 ... Upper link arm, 8, 9... Lower link arm, 10.
... Wheels, 12 ... Travel output shaft, 15.
... Hydraulic cylinder, 19 ... Rotating shaft, 29.
...Restraint link, 32... Training wheel, 33
...Auxiliary leg, 35...Spring, 36...
...Concavity, 37...Stopper pin, 38
... Engine drive shaft, 60 ... Striker, 63 ... Hammer, 65 ... Hydraulic pump, 68 ... Valve mechanism.

Claims (1)

[Scope of Claims] 1. A power transmission for imparting vertical movement to a tool for impact work intended for impact work such as ground crushing or compaction, and the tool for impact work extending downward from the power transmission. A pair of upper link arms whose upper ends are pivotally connected to both sides of the upper part of the fuselage, and a pivot point with the arms is located in front or on the rear side of the cylinder. The upper end of the lower link arm is connected to the fuselage by a restraining link, and the upper end of the lower link arm is connected to the fuselage by a restraining link. A striking work machine in which the piston rod of the cylinder is connected to the upper link arm. 2. The impact working machine according to claim 1, wherein the attachment position of the restraining link connecting the upper part of the machine body and the lower link arm of the bending/extending support leg to the upper part of the machine body can be changed. 3. A power transmission for imparting vertical motion to a hammering tool for hammering work such as ground crushing or compaction, and a reciprocating motion transmission means for the hammering tool extending downward from the power transmission. A pair of upper link arms including rotational force transmission means from the power transmission whose upper ends are pivotally mounted on both sides of the upper part of the fuselage, and a pivot point between the arms is connected to the fuselage body having an internal cylinder, and It is supported by a bending and extending support leg consisting of a pair of lower link arms having wheels driven by the rotational force transmitting means at the lower ends connected to the rear side, and the upper end of the lower link and the fuselage are connected by a restraining link. A striking working machine in which the piston rod of a hydraulic cylinder pivotally mounted on the side of the machine body is connected to an upper link arm. 4. Claims in which the means for transmitting rotational force from the power transmission included in the upper link arm and the lower link arm is a chain and sprocket that connect the transmission output shaft and the rotating shaft and axle of both arm pivot parts. The impact working machine according to item 3. 5. The impact working machine according to claim 3 or 4, wherein the attachment position of the restraint link connecting the upper part of the machine body and the lower link arm of the bending/extending support leg to the upper part of the machine body can be changed. 6. A power transmission for imparting vertical motion to a hammering tool for hammering work such as ground crushing or compaction, and a reciprocating motion transmission means for the hammering tool extending downward from the power transmission. A fuselage body having an internal cylinder is connected to a pair of upper link arms whose upper ends are pivotally attached to both sides of the upper fuselage body, and each of which is connected such that the pivoting portion with the arms is located in front or on the rear side of the cylinder. The lower link arm is supported by a flexible supporting leg consisting of a pair of lower link arms having wheels at the lower end, and the upper end of the lower link arm and the fuselage are connected by a restraining link, and the lower link arm has a supporting leg wheel at its tip and integrally supports the fuselage body. This impact working machine has an auxiliary leg with an auxiliary wheel that supports the machine, and a piston rod of a hydraulic cylinder pivotally mounted on the side of the machine body is connected to an upper link arm. 7 The auxiliary legs of the auxiliary wheel protruding from the lower link arm are
The striking work according to claim 6, which is pivoted in a direction opposite to the direction of inclination of the lower link arm so as to be subjected to downward pressing force by a tension spring and rotation restriction by a stopper pin. Machine. 8. The impact working machine according to claim 6 or 7, wherein the attachment position of the restraint link connecting the upper part of the machine body and the lower link arm of the bending/extending support leg to the upper part of the machine body can be changed.