JP5730145B2 - Pile gear transmission - Google Patents

Description

  The present invention relates to a transmission device for a pile driver, and more specifically, the rotational speed and torque of an output shaft of the rotary drive device connected to a rotary drive device that can be moved up and down along a leader of the pile driver. It is related with the transmission for pile drivers for changing according to.

  In foundation work using a pile driver, work members such as auger screws, casings, and steel pipe piles are connected to a rotary drive device such as an auger drive that can be moved up and down along the leader. While rotating, the rotary drive device is lowered along the leader to excavate the ground or construct a foundation pile. For example, when excavating the ground using an auger screw, if the ground is soft, the auger screw is rotated at a high speed with a low torque. In order to improve the transmission, a transmission is arranged below the rotary drive device, and the rotational speed of the output shaft of the rotary drive device is converted and transmitted to the auger screw (see, for example, Patent Document 1). .

JP 2002-21456 A

  In the conventional pile driver, in the case of ground with standard hardness, the construction time is shortened by connecting the auger screw directly to the rotary drive device and rotating it at high speed. In the case of hard ground, a reduction gear type transmission is connected to the rotation drive device, and the rotation speed of the output shaft of the rotation drive device is reduced and transmitted to the auger screw. The screw is rotated. In the case of ground softer than the standard, a speed increasing type transmission is connected to the rotation drive device, and the auger screw is rotated at a higher speed than the standard time.

  However, it is uneconomical to prepare two types of gearboxes, speed reduction type gearboxes and speedup type gearboxes, in preparation for grounds that are harder than standard and softer than standard. The work is done by directly connecting an auger screw or the like to the rotary drive device as in the case of a standard solid ground without using a speed increasing type transmission. In addition, although a speed variable mechanism is provided in the transmission, the structure of the transmission becomes extremely complicated, which not only increases the manufacturing cost but also requires a lot of labor for maintenance. .

  Therefore, an object of the present invention is to provide a transmission device for a pile driver that can easily cope with any of a ground having a standard hardness, a ground harder than a standard, and a ground softer than a standard.

In order to achieve the above object, a transmission device for a pile driving machine according to the present invention is disposed below a rotary drive device that moves up and down along a leader of the pile driver and converts the rotational speed of an output shaft of the rotary drive device. In the transmission device for a pile driver that outputs the rotation drive device, the rotary drive device is provided on the first end face side and the second end face side of a gear case that houses a plurality of speed change gears having axes arranged in a direction parallel to the leader. A pair of first input / output shafts and second input / output shafts having axes arranged at the same straight line with respect to the axis of the output shaft are provided, and the first end face side of the gear case is on the rotary drive device side. In a state where the first input / output shaft is connected to the output shaft of the rotary drive device, the rotation speed of the first input / output shaft is set to the second end face side of the gear case by the speed change gear. Decelerate to the input / output shaft and output, reverse the gear case to With the surface side facing the rotary drive device side and the second input / output shaft connected to the output shaft of the rotary drive device, the rotational speed of the second input / output shaft is set to the first gear case by the speed change gear. and increased to the first output shaft provided on the end face side output, the gear case is e Bei a supporting means for vertically movably supported along the gear case to the reader, said support means, said The first input / output shaft is formed so that it can be supported by inverting the gear case between a state in which the first end face side is directed to the rotary drive device side and a state in which the second end face side is directed to the rotary drive device side. The second input / output shafts are cylindrical members having the same shape, and are characterized by being vertically symmetrical with respect to a horizontal line passing through the center of the support member .

  Furthermore, in the transmission device for a pile driving machine according to the present invention, the gear case includes a connecting means for connecting the gear case to the rotary drive device, and the gear case is on the first end face side of the gear case. And a drain for discharging the gear oil from the gear case, respectively, on the second end surface side, and a liquid surface of the gear oil in the gear case on the first end surface side and the second end surface side of the gear case. It is characterized in that a level display section for displaying is provided.

  According to the transmission device for a pile driving machine of the present invention, the first input / output shaft of the transmission device for the pile driving machine is output from the rotational driving device with respect to the rotation speed and torque of the rotational driving device when the transmission device is not used. By connecting to the shaft, the second input / output shaft can be converted into a rotational state of low rotation and high torque, and the inverted second input / output shaft of the pile driving gear transmission is connected to the output shaft of the rotary drive device. Thus, the first input / output shaft can be converted into a rotation state with high rotation and low torque. Therefore, it is possible to cope with both ground harder than standard and ground softer than standard by using the transmission device for the pile driving machine appropriately reversed according to the state of the ground. Working efficiency can be improved simply by preparing a transmission.

  Further, the gear case is provided with support means for supporting the gear case so that it can be moved up and down along with the leader, and connection means for connecting to the rotary drive device, so that the transmission device for the pile driving machine is reliably arranged below the rotary drive device. be able to. Further, by providing a drain and a level display on each of the first end face side and the second end face side of the gear case, either the first input / output shaft or the second output shaft is directed toward the rotary drive device side. Even when arranged, the gear oil in the gear case can be easily replaced and the amount of gear oil can be easily checked.

It is a longitudinal cross-sectional view of the transmission device for pile driving machines which shows one example of this invention. It is a top view of the transmission for a pile driver similarly. It is a front view which shows an example of the state which embeds a steel pipe pile without using the transmission for pile driving machines. It is a front view which shows an example of the state which embeds a steel pipe pile using the transmission for pile drivers for low-speed high torque. It is a front view which shows an example of the state which performs excavation work with a screw, using the transmission for pile drivers for high-speed low torque.

  The pile driving device 11 shown in FIG. 1 and FIG. 2 is disposed below the rotary drive device 14 provided in the leader 13 of the pile driver 12 so as to be movable up and down, and the output shaft 14 a of the rotary drive device 14 rotates. The transmission gears 16a, 16b, 16c, and 16d are appropriately provided inside a gear case 15 that is formed in a sealed box shape. A first input / output shaft 17 is provided on the first end face side 15a of the gear case 15 located on the upper side of the drawing in FIG. 1 while being accommodated via a bearing, and the gear case 15 located on the lower side of the drawing in FIG. A second input / output shaft 18 is provided on the second end face side 15b.

  A first transmission gear 16a is coupled to the first input / output shaft 17, and a fourth transmission gear 16d is coupled to the second input / output shaft 18, and a second gear meshing with the first transmission gear 16a. The third speed change gear 16c that meshes with the speed change gear 16b and the fourth speed change gear 16d is respectively coupled to both ends of the transmission shaft 19 provided in parallel to the leader 13 side of the gear case 15. Further, the number of teeth of the first speed change gear 16a is set to be smaller than the number of teeth of the fourth speed change gear 16d, and the number of teeth of the third speed change gear 16c is set to be less than the number of teeth of the second speed change gear 16b. The gears 16a, 16b, 16c, and 16d are used for shifting.

  When the first input / output shaft 17 is rotationally driven, the first speed change gear 16a that rotates together with the first input / output shaft 17 passes through the second speed change gear 16b, the transmission shaft 19 and the third speed change gear 16c. Rotation is transmitted to the fourth speed change gear 16d, and the second input / output shaft 18 that rotates integrally with the fourth speed change gear 16d has the first gear number set according to the number of teeth of the speed change gears 16a, 16b, 16c, and 16d. 1 The input / output shaft 17 is rotated at a lower speed and with a higher torque.

  Conversely, when the second input / output shaft 18 is rotationally driven, the fourth speed change gear 16d, the third speed change gear 16c, the transmission shaft 19 and the second speed change gear 16b rotate together with the second input / output shaft 18. The first input / output shaft 17 that is transmitted to the first transmission gear 16a through the shaft and rotates integrally with the first transmission gear 16a is set by setting the number of teeth of each of the transmission gears 16a, 16b, 16c, and 16d. The second input / output shaft 18 rotates at a higher speed and lower torque.

  Further, drains 20 and 20 for extracting gear oil filled in the gear case 15 are provided on the end face of the first end face side 15a and the end face of the second end face side 15b of the gear case 15, respectively. Furthermore, level display portions 21 and 21 for displaying the level of gear oil filled in the gear case 15 are provided on the side surface of the first end surface side 15a and the side surface of the second end surface side 15b, respectively. . Further, on the leader 13 side of the gear case 15, a pair of guide gigs 22, 22 that are slidably engaged with a pair of guide rails 13 a, 13 a provided on the leader 13 are provided.

  The pair of upper and lower first input / output shafts 17 and the second input / output shaft 18 have the same shape made of a cylindrical member whose outer surface is circular and whose inner surface is formed in a square or hexagon. 22 is slidably engaged with the guide rails 13a and 13a, and the pile driving device 11 is disposed below the rotary drive device 14, the axis of the output shaft 14a of the rotary drive device 14 and The axis of the first input / output shaft 17 and the axis of the second input / output shaft 18 are set so as to be aligned on the same straight line. Usually, it is formed vertically symmetrical with respect to a horizontal line passing through the centers of the guide gibbs 22 and 22 in a state where it is attached to the reader 13 standing in the vertical direction.

  The pile driver 12 is manufactured according to the standard hardness ground, and when performing the press-fitting work of the steel pipe pile 31 on the standard hardness ground, as shown in FIG. The steel pipe pile 31 is connected to the output shaft 14a of the rotation drive device 14 via the connection attachment 32 and the connection cap 33, and the operation is performed in a state where the output shaft 14a of the rotation drive device 14 and the steel pipe pile 31 are directly connected.

  Further, when the press-fitting operation of the casing 41 is performed on a hard ground compared to a standard hard ground, as shown in FIG. 4, the output shaft 14 a of the rotary drive device 14 is connected via a connection attachment 42. The first input / output shaft 17 of the pile driving device 11 is connected to the second input / output shaft 18 that is located on the lower surface side of the pile driving device 11 and the connection attachment 43 and the connecting device 43 are connected. The casing 41 is connected via the cap 44.

  As a result, the rotation speed of the output shaft 14a of the rotary drive device 14 is changed from the first input / output shaft 17 to the first transmission gear 16a, the second transmission gear 16b, the transmission shaft 19, The casing 41 connected to the second input / output shaft 18 is transmitted to the second input / output shaft 18 at a reduced speed via the third speed change gear 16c and the fourth speed change gear 16d. The rotation speed is lower than that of the 14 output shafts 14a, and the torque is high.

  On the other hand, when excavation work with the auger screw 51 is performed on a soft ground compared to a standard solid ground, as shown in FIG. 5, the pile driving device 11 is changed from the state shown in FIG. 4. The second input / output shaft 18 of the pile driving transmission 11 is connected to the output shaft 14a of the rotation driving device 14 via the connection attachment 52, and the pile driving transmission 11 of the pile driving device 11 is turned upside down. The auger screw 51 is connected to the first input / output shaft 17 that is located on the lower surface side via a connection attachment 53.

  Thereby, the rotation speed of the output shaft 14a of the rotation drive device 14 is changed from the second input / output shaft 18 to the fourth speed change gear 16d, the third speed change gear 16c, the transmission shaft 19, the second speed change gear 16b, The auger screw 51 connected to the first input / output shaft 17 is transmitted to the first input / output shaft 17 through the speed change gear 16a. It will rotate at a higher speed and lower torque than the number.

  In this way, the transmission device 11 for the pile driving machine is not used when the ground is of a standard hardness, and the first input / output shaft 17 is installed when the ground is harder than the ground of a standard hardness. The pile driver transmission 11 facing the upper surface is connected to the lower side of the rotary drive device 14 and the second input / output shaft 18 faces the upper surface when the ground is softer than the standard ground. By connecting the transmission device 11 for the pile driver below the rotational drive device 14, the work can be carried out at an optimum rotational speed and torque according to the ground condition, and the efficiency of various operations by the pile driver 12 can be achieved. Can be improved. Moreover, it is only necessary to prepare one pile driver transmission 11 and it is possible to easily cope with different ground conditions at each work position in the work area.

  Further, by providing the drain 20 and the level display unit 21 on the first end surface side 15a and the second end surface side 15b, respectively, the second input / output shaft 18 can be used even when the first input / output shaft 17 faces the rotary drive device side. Even when the rotary drive device is directed to the rotary drive device side, the state of the gear oil in the gear case 15 can be easily confirmed from the outside while the pile driving device 11 is being used, and the gear oil can be easily replaced or replenished. it can.

  In the present embodiment, guide gigs 22 and 22 are provided in the pile driving device 11, and the pile driving device 11 is formed to be movable up and down along the leader 13 by the guide rails 13 a and 13 a of the reader 13. The connecting means for connecting the rotary drive device 14 to the first end face side 15a and the second end face side 15b of the pile driver transmission 11 is provided, and the connecting means is used when the pile driver transmission 11 is used. Therefore, the pile driving device 11 can be used in a state where it is connected to the lower side of the rotary drive device 14.

  In addition, the working member that transmits the rotation from the transmission device for the pile driver can be arbitrarily selected according to the work purpose, and the connection attachment and the connection cap have the structure of the output shaft, the steel pipe pile In accordance with the structure of the connecting portion of the working members such as the casing, the auger screw and the like. Further, the first end surface side 15a and the second end surface side 15b can be formed in the same shape, but can be formed in different shapes in order to distinguish the deceleration side and the acceleration side. In addition, a known speed reduction mechanism such as a planetary gear mechanism can be adopted as the speed change mechanism, and the configuration of the pile driving machine is also arbitrary.

  DESCRIPTION OF SYMBOLS 11 ... Transmission device for pile driver, 12 ... Pile driver, 13 ... Leader, 13a ... Guide rail, 14 ... Rotation drive device, 14a ... Output shaft, 15 ... Gear case, 15a ... First end face side, 15b ... First 2 end face sides, 16a, 16b, 16c, 16d ... gears for transmission, 17 ... first input / output shaft, 18 ... second input / output shaft, 19 ... transmission shaft, 20 ... drain, 21 ... level display section, 22 ... guide give 31 ... Steel pipe piles, 32 ... Attachment for connection, 33 ... Connection cap, 41 ... Casing, 42, 43 ... Attachment for connection, 44 ... Connection cap, 51 ... Auger screw, 52, 53 ... Attachment for connection

Claims (4)

In a transmission device for a pile driver that is arranged below a rotary drive device that moves up and down along a leader of the pile driver and converts the output speed of the output shaft of the rotary drive device and outputs it, the parallel device is parallel to the leader Axis lines are arranged on the first end face side and the second end face side of a gear case containing a plurality of speed change gears having axes arranged in the direction at positions that are collinear with respect to the axis line of the output shaft of the rotary drive device. A pair of the first input / output shaft and the second input / output shaft are provided, the first input / output shaft is connected to the output shaft of the rotary drive device with the first end face side of the gear case facing the rotary drive device side. In this state, the rotational speed of the first input / output shaft is decelerated and output to the second input / output shaft provided on the second end face side of the gear case by the speed change gear, and the gear case is inverted to change the first speed. With the two end surfaces facing the rotary drive device side, the second input / output shaft is While connected to an output shaft of the serial rotary drive, and outputs increased to the first output shaft provided the rotational speed of the second output shaft to the first end face side of the gear case by the transmission gear ,
The gear case includes support means for supporting the gear case so as to be movable up and down along the reader. The support means has a state in which the first end face side is directed to the rotary drive side and the second end face side. The gear case is inverted to be supported in a state directed toward the rotational drive device,
The first input / output shaft and the second input / output shaft are cylindrical members having the same shape, and are formed vertically symmetrical with respect to a horizontal line passing through the center of the support means. Pile driver transmission. The gear case, pile driver for transmission according to claim 1, characterized in that it comprises connecting means for connecting the gear case to the rotary drive device. The pile according to claim 1 or 2 , wherein drains for discharging gear oil from the inside of the gear case are provided on the first end surface side and the second end surface side of the gear case, respectively. Gearbox gearbox. The gear case, the first end surface and the second end face side of the gear case according to claim 1 to 3 level display unit for displaying the liquid level of the gear oil in the gear case, characterized in that provided respectively The transmission for a pile driver according to any one of the above.

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