JP4100512B2 - Detachment device with working machine pins - Google Patents

Description

  The present invention relates to a working machine such as a construction machine, for example, a pin used for connection between a main body and a working arm, connection between arms constituting the working arm, or attachment / detachment by a pin between the working arm and the work tool. The present invention relates to an attachment / detachment device.

  For example, in a dismantling machine that dismantles a building such as a building, it is necessary to change the length of the articulated arm according to the height of the building in order to perform dismantling work with good workability. Such a length change is performed by rearranging the front by replenishing or removing the extension arm as disclosed in, for example, Patent Document 1. Conventionally, the front can be rearranged by connecting the extension arm, etc., by aligning the pin holes of the two arms to be connected to each other, hanging the connecting pin with a crane, and aligning the pin with the pin hole. This is done by hitting and inserting a pin with a hammer, and a hammer is also used to remove the pin.

  As another conventional example of attaching and detaching a pin, as disclosed in Patent Document 2, a connecting pin is housed in a tubular housing so as to be able to project and retract from both ends, and as a means for projecting and retracting the pin, A screw rod is provided so as to penetrate the central portion of the housing, and the screw rod reverses the thread groove with the central portion in the longitudinal direction as a boundary, and a nut member is screwed to each of the reversed portions, There is a type in which pins at both ends are connected by a rhombus link, and a pin is inserted into and removed from a pin hole of a member to be coupled by projecting and retracting the pin by turning the screw rod from the outside with a handle.

No. 7-52184 Utility Model Registration No. 2537066

  As described in Patent Document 1, since the pins are suspended by a crane and the arms are connected by hammering, there is a problem that a crane is required and labor is required for hammering.

  Further, as described in Patent Document 2, a screw rod having a special structure in which a thread groove is inverted at the center in the longitudinal direction, and a nut member and a link mechanism are used for a crane for hanging a pin or a hammer for hitting. However, there is a problem that the structure is complicated and manufacturing is not easy.

  In view of the above problems, the present invention provides an attachment / detachment device using a pin of a working machine having a relatively simple structure that can be easily attached / detached by a pin between members by a relatively simple means. Objective.

(1) The attaching / detaching device using the pins of the working machine according to the present invention includes a cylindrical housing attached to one of the two members of the working machine to be connected by the pins;
A cylindrical pin slidably inserted into the housing;
A female screw provided concentrically on the cylindrical pin;
A worm wheel rotatably mounted in the housing;
A screw rod fixed concentrically to the worm wheel and meshed with the female thread;
The worm wheel is attached to the housing so as to mesh with the worm wheel, and includes a worm having a rotation operation portion at a portion protruding outward from the housing,
The two members are operated by rotating the worm by operating the rotation operation portion, and rotating the worm wheel and the screw rod to insert and remove the cylindrical pin from the pin hole of the two members. It is characterized by connecting and releasing.

(2) Moreover, the attachment / detachment apparatus by the pin of the working machine of this invention WHEREIN:
In the connected state of the two members, a lid for preventing the connecting portion of the two members from coming off from the pin is detachably attached to the end portion of the pin.

  In the present invention, the operator can connect and release the two members by the pin by inserting and removing the cylindrical pin from the pin hole by rotating the operation part of the worm using a tool. Reduced and can be easily attached and detached between members. Further, the present invention can be realized with a simple structure using commercially available parts.

  FIG. 1A is a side view showing an example of a working machine to which the pin attaching / detaching device of the present invention is applied. This working machine constitutes a dismantling machine, and a revolving unit 2 is installed on a traveling unit 1 via a revolving device 3, and a cab 4 and a hydraulic power unit 5 are mounted on the revolving unit 2. A working arm 6 is attached to the swivel body 2 and a crushing tool 7 is attached to the tip thereof.

  The working arm 6 includes a first arm 9, a second arm 10, and a third arm 11, and hydraulic cylinders 12 to 14 for raising and lowering each of them and a hydraulic cylinder for turning the crushing tool 7. 15 is provided. The first arm 9 includes a proximal arm 9a and a distal arm 9b. As shown in FIG. 1B, these arms 9a and 9b are connected to connecting portions 16 and 17 provided respectively. 19 is inserted and removed to be detachably connected. This working arm 6 has one connecting arm (not shown) between the base end side arm 9a and the front end side arm 9b according to the height of the building to be disassembled by a similar connecting structure with pins 19. Or two or more are added.

  FIG. 2 is a cross-sectional view showing an embodiment of an attaching / detaching device using a pin according to the present invention for connecting two members (base end side arm 9a and tip end side arm 9b) by the pin 19. In FIG. 3 is a cross-sectional view taken along line EE in FIG. 2, FIG. 4 is a cross-sectional view taken along line FF in FIG. 3, FIG. 5A is a cross-sectional view taken along line GG in FIG. FIG.

  As shown in FIG. 2, one of the connecting portions 16 and 17 has a bifurcated shape, and the other connecting portion 17 is fitted between the two forks, and the pin holes 16a and 17a of both are fitted. The pin 19 is inserted to connect the two. Reference numeral 20 denotes a cylindrical housing. The housing 20 is configured by abutting left and right cylindrical bodies 20a and 20b and connecting them with bolts 21. The housing 20 is fitted between the left and right connecting portions 16 at the distal end of the proximal end arm 9a (or the distal end of the adding arm), and the flanges 22 at both ends of the housing 20 are fixed to the connecting portion 16 by bolts 23. .

  In FIG. 2, for the sake of explanation, the cylindrical body 20a side shows a state in which the pin 19 protrudes, and the cylindrical body 20b side shows a state in which the pin 19 is accommodated. It operates so that the pin 19 may protrude and be accommodated from 20a and 20b, respectively.

  The pin 19 is formed in a cylindrical shape and is slidably inserted to the left and right of the housing 20. An anti-rotation groove 19a is provided in the longitudinal direction on the outer periphery of each pin 19, and a key 24 attached to both end faces of the housing 20 is fitted into the groove 19a to prevent rotation. Reference numeral 25 denotes a ring-shaped female screw attached to the inner end of each pin 19 by a bolt 26 concentrically with the pin 19.

  Reference numeral 27 denotes a worm wheel. The worm wheel 27 is housed between the left and right cylinders 20a and 20b in the housing 20 and is rotatably mounted. Reference numeral 29 denotes a screw rod. The screw rod 29 is protruded from both sides of the worm wheel 27, fixed concentrically with the worm wheel 27, and screwed into the female screw 25.

  Reference numeral 30 denotes a worm, and the worm 30 is attached to the abutting portions of the left and right cylindrical bodies 20a and 20b of the housing 20 by engaging with the worm wheel 27. The shaft 30a of the worm 30 is provided with, for example, an angular shaft portion 31 as a rotation operation portion at a portion protruding from the housing 20 to the outside.

  When the arms 9a and 9b are connected by using this pin attachment / detachment device, a wrench or a spanner having a square hole is attached to the square shaft portion 31 and operated to rotate the worm 30. The worm wheel 27 and the screw rod 29 are rotated so that the cylindrical pin 19 is inserted into and removed from the pin holes 16a and 17a of the connecting portions 16 and 17, thereby connecting and releasing them. In the connected state, a lid 33 is attached to the tip of the pin 19 with a bolt 32 so that the lid 33 can be brought into contact with or brought into contact with the outer surface of the connecting portion 16. Prevents falling out.

  As described above, the apparatus according to the present embodiment is used to add the pin 19 between the arms 9a and 9b by rotating the worm 30 by using the tool, or to add to the arms 9a and 9b. Since the connection between the arms or between the arms for extension can be performed, the pins can be attached and detached using a simple tool or the like. The apparatus according to the present embodiment includes a worm 30, a worm wheel 27, a screw rod 29, and a female screw 25, and can be configured relatively easily using commercially available parts.

  The attachment / detachment device using the pins of the present invention can be used for connection between the revolving unit 2 and the work arm 6 and for connection between the work arm 6 and the crushing tool 7 and other work tools. Also, the structure of the connecting portion is not limited to the bifurcated shape, but may be a single plate shape or a structure in which the connecting portion 16 is fixed to the outer periphery of the housing 21. Moreover, this invention is applicable to the various working machines which have these connection structures other than a demolition machine.

(A) is a side view which shows an example of the working machine which applies the attachment / detachment apparatus by the pin by this invention, (B) is the elements on larger scale. It is sectional drawing which shows one Embodiment of the attachment or detachment apparatus by the pin of this invention. It is EE sectional drawing of FIG. It is FF sectional drawing of FIG. (A) is GG sectional drawing of FIG. 3, (B) is a X arrow directional view of FIG.

Explanation of symbols

1: traveling body, 2: turning body, 3: turning device, 4: cab, 5: hydraulic power unit, 6: work arm, 7: crushing tool, 9: first arm, 10: second arm, 11: Third arm, 12 to 15: hydraulic cylinder, 16, 17: connecting portion, 19: pin, 20: housing, 21: bolt, 22: flange, 23: bolt, 24: key, 25: female screw, 26: bolt, 27: Worm wheel, 29: Screw rod, 30: Worm, 30a: Worm shaft, 31: Square shaft portion, 32: Bolt, 33: Lid

Claims (2)

A cylindrical housing attached to one of the two members of the work machine to be connected by a pin;
A cylindrical pin slidably inserted into the housing;
A female screw provided concentrically on the cylindrical pin;
A worm wheel rotatably mounted in the housing;
A screw rod fixed concentrically to the worm wheel and meshed with the female thread;
The worm wheel is attached to the housing so as to mesh with the worm wheel, and includes a worm having a rotation operation portion at a portion protruding outward from the housing,
The two members are operated by rotating the worm by operating the rotation operation portion, and rotating the worm wheel and the screw rod to insert and remove the cylindrical pin from the pin hole of the two members. An attachment / detachment device using a work machine pin characterized by connecting and releasing. In the attachment / detachment apparatus by the pin of the working machine of Claim 1,
An attaching / detaching device using a pin of a work machine, wherein a lid for preventing the connecting portion of the two members from coming off from the pin is detachably attached to an end of the pin in the connected state of the two members.

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