JPS6136575Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a hammer device used in a pile driver, a rock crusher, etc.

[Technical background of the invention and its problems] Conventional hammer devices are, for example,
As shown in the publication, the central part of the rotary arm is integrally fitted onto one rotating main shaft, and the balancer is rotatably supported on one end of the rotary arm via a balancer shaft, and the other end is rotatably supported. The hammer is rotatably supported via a hammer shaft in the section.

In this conventional device, the rotating arm has a sufficient arm length to prevent collision between the rotating main shaft and the balancer and hammer, and the balancer and hammer rotate between the rotating main shaft and the balancer shaft, and between the rotating main shaft and the hammer shaft. However, since this distance is ensured, there is a drawback that the entire structure from the balancer to the hammer becomes large.

[Purpose of the invention] The object of the invention is to reduce the size of the hammer device while maintaining the same striking ability by improving the mounting structure of the balancer, hammer, etc.

[Summary of the invention] The hammer device of the invention has a rotating main shaft on one side and a rotating main shaft on the other side that are set concentrically projecting outward from approximately the center of left and right side plates arranged in parallel. The left and right side plates and the middle plate, which is arranged parallel to each other and has a recess for rotating the balancer, are integrally fixed via a plurality of fixing shafts inserted through both ends of these plates. A balancer is rotatably supported via a balancer shaft at a position between the side plates and eccentric to one side with respect to the rotational main shaft, and a balancer is rotatably supported between one place between each of the plates and eccentric to the other side with respect to the rotational main shaft. The structure is characterized in that the hammer is rotatably supported at a position via a hammer shaft, and a weight is fixed on the hammer side between the remaining plates, and the balancer and hammer are rotated. It can be supported close to the main shaft regardless of the main shaft.

[Embodiment of the invention] Hereinafter, the invention will be described in detail with reference to one embodiment shown in FIGS. 1 to 10 and another embodiment shown in FIG.

As shown in FIG. 1, a guide column 4 is vertically erected by the tip of a multi-stage telescopic arm 2 provided on a crane vehicle 1 and a lower cylinder 3, and a pile driving device 5 is mounted vertically on this guide column 4. Both ends of a chain 7, which is movably attached and wound endlessly around the upper and lower sprockets 6 of the guide column 4, are connected to the lower spring case 8 of the pile driving device 5, and this chain 7 is attached to the lower part of the guide column 4. The pile driving device 5 is moved up and down by being rotated in forward and reverse directions by the attached electric motor 9 with a worm reducer. This piling device 5
A hammer drive motor 14 is fixed to an upper base 13 via a connecting member 12 provided with guide rollers 10 and 11 on the upper and lower parts, respectively, and a flywheel 16 is provided on the shaft 15 of this motor.
A small-diameter pulley 17 is provided, and an endless belt 20 is wound between the pulley 17 and a large-diameter pulley 19 that is integrally fitted to the rotating main shaft 18 of the hammer device of the present invention. The pile driving device 5 also engages a long sheet pile 22 with a sheet pile holding bolt and nut 21 that are engaged with the lower end flange portion of the pile driving device 5 via a sheet pile stand 23 that is integrally provided at the upper end thereof. Become.

Further, as shown in FIGS. 2 and 3, a balancer 26, a hammer 27, and a lead weight 28, which are rotated by the rotating main shaft 18, are provided inside the main body casing 25 of the pile driving device 5. An intermediary support arm 30 is provided which is swingably supported by an external support shaft 29. This support arm 30 is
It is divided into two parts at the middle part, and the distal end side is provided so as to be able to rotate in the vertical direction using the shaft 31 of the intermediate part as a fulcrum, and supports the intermediary body 32 provided on the distal end holding part 30a so as to be vertically movable. This intermediate body 32 uses the shaft 31 as a fulcrum and supports the support arm 30 with a leaf spring 33.
The locking plate 34 is biased upward by the
Press it on. Note that the above-mentioned intermediate support arm 30
A roller 36 that rolls while contacting a receiving plate 35 provided on the inner surface of the main body casing 25 is attached to the base end side of the main body casing 25 .

In addition, as shown in FIG. 3, the main body casing 25
A shaft holding part 39 is fixed to the lower part of the shaft holding part 39, and the output shaft 40 is placed inside the shaft holding part 39 within a range in which the convex part 42 of the output shaft 40 can slide with respect to the inner concave part 41 of the shaft holding part 39. A slide needle bearing 43 is fixed to the outer surface of this holding part 39, and a spring case 8, which is also a connecting part of the chain 7, is attached to the outside of the shaft holding part 39 via this bearing 43 so as to be able to move up and down. Fit freely. As shown in FIG. 4, this spring case 8 includes an inner cylinder part formed into an octagonal shape in consideration of contact with the bearing 43, and an outer cylinder part formed into a cylindrical shape outside the inner cylinder part. A strong coil spring 45 with a large spring constant is inserted into the spring fitting recess 44, and the lower end of the coil spring 45 is inserted into the shaft holding portion 39. It engages with the lower end flange portion 46.

Further, as shown in FIG. 2, the force that compresses the coil spring 45, that is, the force that presses the sheet pile 22 against the ground, is detected, and if the force is large, the number of shafts 18 is The intermediate body 32 is transferred to the output shaft 40 once per rotation.
A crimping force detection/intermediary body actuation mechanism is provided which moves the intermediate body 32 to a hammering position coaxial with the hammer and, if the force is small, keeps the intermediate body 32 in the non-hammering position.

That is, as shown in FIG. 3, a pressure roller 52 is provided via a support portion 51 that is integrally provided on the outer surface of the spring case 8, and a lever 53 that is pushed by this pressure roller 52 is attached to the main body casing. The lever 53 is rotatably supported by a shaft 55 on a support portion 54 that integrally projects from the lower part of the lever 53, and as shown in FIG. A lever 60 rotatably supported by a shaft 59 is sequentially connected, and a shift fork lever 62 operated by an engaging portion 61 on the opposite side of the lever 60 is connected to the support shaft 5.
9, a press cylinder 64 slidably fitted to the rotating main shaft 18 is engaged with the tip shift fork 63 of the shift fork lever 62 so as to be movable in the axial direction. The shape of a part of the annular groove is selectively changed by a cam groove variable body 66 that moves in the axial direction against a coil spring 65 and an arcuate plate 68 provided in a part of a rotating disk 67 on one side. The cam groove 69 is connected to a pair of rotating discs 6
A cam follower roller 73 that is pivotally supported by a slider 72 that moves along a guide shaft 71 that is parallel to the rotational main shaft 18 is fitted into this cam groove 69, and a link 74 is fitted to the slider 72. One end of an amplification lever 75 is connected to the intermediate portion of the lever 75 via a shaft 76, and the intermediate portion of the lever 75 is rotatably supported at a fixed position by a shaft 76. Connect 30a.

As shown in FIGS. 5 and 6, the cam groove variable body 66 has a plurality of axial movement guide protrusions attached to a reduction cylinder portion 79 that is rotatably fitted to the rotating main shaft 18 via a bearing 78. part 80, a spring receiving part 81 which is freely movable in the axial direction, and a plate part 82 fixed thereto.
It is provided so as to be freely movable in the axial direction via a sliding portion 84 guided by a pair of guide convex portions 83 . A selection piece 87 is integrally provided on the plate portion 82 via plate members 85 and 86, so that the cam groove variable body 66 is not located at an odd position of the intermediate coating of the cam groove 69 when the cam follower roller 73 passes. To,
This selection piece 87 is selectively moved by a fixed semicircular member 88. Further, as shown in FIG. 8, the reduction cylinder section 79 transfers the rotational power taken out from the small diameter gear 89 integrally fitted to the rotating main shaft 18 to the gears 90, 9.
1 to the large-diameter gear 92 that is integrated with the reduction cylinder portion 79, the rotation speed is lower than that of the rotating main shaft 18.

7 to 10, the structure in which the balancer 26, hammer 27, and weight 28 are installed inside the main body casing 25 will be described. A boss 97 is integrally provided, and a rotating main shaft 18a on one side and a rotating main shaft 18b on the other side, which are set concentrically, are integrally fitted through the boss 97 through a key 98, respectively, so that the side plates 95, The boss 97 is rotatably supported by a holder 101 integral with the main body casing 25 via a radial bearing 99 and a thrust bearing 100, and the left and right side plates 95,
96, and an intermediate plate 103 having a balancer rotation recess 102 arranged at a parallel interval therebetween,
These are integrally fixed via four fixed shafts 104 inserted through both ends, and the left and right side plates 95, 96 are fixed together.
A balancer shaft 105 is installed at a position eccentric to one side with respect to the rotating main shafts 18a and 18b between the two, and the stepped-shaped balancer 26 is rotatably supported by the balancer shaft 105. between the side plate 95 and the middle plate 103 of the rotating main shaft 18
A hammer shaft 106 is installed at a position eccentric to the other side with respect to a and 18b, and the hammer 27 is rotatably supported by this hammer shaft 106, and between the side plate 96 and the middle plate 103 on the other side. The weight 28 having a recess 107 similar to the middle plate 103 is fixed to the hammer 27 side, and the balancer 26 has a portion 26a facing the hammer 27 formed with a small diameter, and the small diameter portion 26a and the hammer The balancer 26 and the hammer 27 are provided as close as possible within a range where they do not collide with each other. The weight 28 is connected to the fixed shaft 1
04 and then fixed to this fixed shaft 104 by screwing or the like.

Next, to explain the operation, when the forward/reverse clutch of the motor 9 is lever operated to select the direction of rotation of the motor 9 and the lower spring case 8 of the pile driving device 5 is pulled down by the chain 7, the initial Although the sheet pile 22 is easily inserted into the ground G, this sheet pile 22
When it is no longer inserted into the ground due to high earth pressure,
Output shaft 4 locked by its sheet pile 22
0. Since the flange portion 46 is held in a substantially fixed position via the shaft holding portion 39 which is engaged with the shaft holding portion 39 through the uneven portions 41 and 42, the coil spring 45 having a strong repulsive force starts to be compressed, and the The pressing force of the sheet pile 22 against the sheet pile gradually increases. Then, when the crane vehicle 1 moves to a position where the spring case 8 abuts against the flange portion 46 in a high pressure bonded state immediately before the guide column 4 is lifted up, automatic striking is activated. That is, the pressure roller 52 is pressed against the lever 5.
3 to the effective operating position, and the interlocking members 56, 5
7, 58, 60, and 62, the pressing cylinder 64 moves the cam groove variable body 66, which is rotating at a lower speed than the rotating main shaft 18, to the left in FIG. 66 and an arcuate plate 68, and the cam follower roller 7 passes through this curved groove.
3 is reciprocated to the right in FIG. 2, thereby moving the intermediary body 32 to the left in FIG. After transmitting the impact force of the hammer 27 to the output shaft 40 at the striking position, it returns to the non-hammer striking position on the right side shown in the figure.

This action is repeated while high earth pressure is acting on the sheet pile 22, and when the sheet pile 22 can be easily inserted into the ground, the above pressing force is suppressed by the restoring force of the strong coil spring 45. roller 52
Since the lever 53 is separated from the lever 53, the cam groove variable body 66 is kept within the arcuate plate 68, and the cam groove 69 does not move around the entire circumference, so the intermediary body 32 is also in the non-hammering position shown in FIG. is maintained, the hammering is automatically stopped, and dry firing is prevented. At this time, the hammer 27 is spinning idly.

To explain the action of the balancer 26, at the moment when the hammer 27 collides with the intermediary body 32, the balancer 26 rotates about the balancer shaft 105 in the direction of the arrow in FIG. Absorb power.

Further, as in another embodiment of the present invention shown in FIG. 11, two intermediate plates 103 are provided, and the hammer 27 is
The hammer 27 may be placed between two intermediate plates 103, and the weights 28 may be placed on both sides of the hammer 27. The structure and operation of this embodiment are the same as those of the previous embodiment, so the same reference numerals are used and the explanation thereof will be omitted.

The present invention can also be used in a rock crusher towed by a bulldozer or the like as disclosed in Japanese Patent Application No. 57-35417.

[Effects of the invention] According to the invention, the rotating main shaft is divided into one side and the other side, and the rotating balancer, rotating hammer, and weight are installed between them via the left and right side plates, middle plate, etc. Therefore, there is no risk that the rotating balancer and the rotating hammer will collide with the rotating main shaft, and the balancer and the hammer can be supported as close together as possible without colliding with each other, and the hammer device can be made smaller. . Therefore, it has become possible to use this type of rotary hammer device in a pile driver.

[Brief explanation of the drawing]

Figure 1 is a front view of a pile driver using the hammer device of the present invention, Figure 2 is a partially cutaway perspective view of the pile driver, and Figure 3 is a sectional view of the lower part of the pile driver. , FIG. 4 is a sectional view taken along the - line in FIG. 3, FIG. 5 is a front view of the cam groove variable body operating portion in the pile driving device section, and FIG. 6 is a sectional view taken along the - line in FIG. 5.
7 is a front view showing one embodiment of the hammer device of the present invention, FIG. 8 is a cross-sectional view taken along the line -- in FIG. 7, FIG. 9 is a cross-sectional view taken along the line -- in FIG. 7, and FIG. 11 is a front view showing another embodiment of the present invention. 18a, 18b... Rotating main shaft, 26... Balancer, 27... Hammer, 28... Weight, 95, 96
... Side plate, 102 ... Balancer rotation recess, 10
3...middle plate, 104...fixed shaft, 105...balancer shaft, 106...hammer shaft.

Claims (1)

[Claims for Utility Model Registration] (1) A rotating main shaft on one side and a rotating main shaft on the other side, which are set concentrically, are integrally protruded outward from approximately the center of left and right side plates arranged in parallel. The left and right side plates are integrally fixed to each other through a middle plate having a recess for rotating the balancer, which is arranged at a parallel interval between the left and right side plates, and a plurality of fixing shafts inserted through both ends of the middle plate. A balancer is rotatably supported via a balancer shaft at a position eccentric to one side with respect to the rotating main shaft, and a balancer is rotatably supported between one place between each of the plates and eccentric to the other side with respect to the rotating main shaft. A hammer device characterized in that a hammer is rotatably supported via a hammer shaft, and a weight is fixed on the hammer side between the remaining plates. (2) The hammer device according to claim 1, wherein the balancer has a small diameter portion that faces the hammer. (3) The hammer device according to claim 1 of the utility model registration, characterized in that two intermediate plates are provided.