JP2011236680A - Dozer device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dozer device which can be easily attached to a mounting bracket unit provided on a boom in place of operation equipment such as bucket.SOLUTION: A dozer device comprises: a dozer blade 8; an adapter unit 6, which has a part 63 to be engaged engageable with a common engaging part 53 provided in a mounting bracket unit 5 and is connected to the mounting bracket unit 5 by engagement between the common engaging part and the part to be engaged; and connection means 7, which includes a connecting part 73 provided in the adapter unit and a part 71 to be connected provided in the dozer blade and connects the adapter unit with the dozer blade, the adapter unit and the dozer blade being self-supported in a connection preparation attitude, and the adapter unit 6 being engageable with the mounting bracket unit 5 in the connection preparation attitude.

Description

  The present invention relates to a dozer device mounted on a mounting bracket unit provided at the tip of a boom assembly mounted on a work vehicle such as a front loader or a tractor. In place of the dozer device, other work devices such as buckets can be attached to the mounting bracket unit. The mounting bracket unit can swing around a horizontal axis, and thereby the working device can be positioned in a desired posture.

  There is known a work vehicle in which work equipment such as a bucket, a general-purpose blade, and a forklift claw can be replaced and attached to a coupler formed at the tip of a lift arm (boom) (see, for example, Patent Document 1). This coupler is composed of a frame that forms the tip of the lift arm and a mounting portion provided on the frame. A bucket and a general-purpose blade are directly attached to the coupler using pins and bolts. Since each mounting portion for mounting such various working equipment is provided in the coupler, when there are many types of work equipment that can be replaced and attached, not only the structure of the coupler is complicated, but also the mounting portion is formed. It is difficult to secure space.

Registered Utility Model No. 3032010 (page 6, FIG. 1, FIG. 3)

  In view of the above circumstances, an object of the present invention is to provide a dozer device that can be easily mounted on a mounting bracket unit provided on a boom mounted on a work vehicle, instead of a work device such as a bucket. is there.

  A dozer device according to the present invention, which is attached to a swingable mounting bracket unit provided at the tip of a boom assembly provided in a work vehicle, includes a dozer blade and a common engaging portion provided in the mounting bracket unit. An adapter unit having an engageable portion that can be engaged and connected to the mounting bracket unit by engagement of the common engagement portion and the engaged portion, a connection portion provided in the adapter unit, and the And a connecting means for connecting the adapter unit and the dozer blade. The adapter unit and the dozer blade are self-supporting in a connection preparation posture suitable for connection by the connecting means. And the adapter unit can be attached to the mounting bracket in the connection ready posture. Are units engage coupleable configured.

  According to this configuration, the dozer blade having a function as a ground work device is not directly connected to the mounting bracket unit of the boom assembly but indirectly connected through the adapter unit. The adapter unit includes an engaged portion that is provided in the mounting bracket unit and engages with a common engaging portion that can also engage other work devices such as a bucket device, and is engaged with the common engaging portion. The adapter unit is connected to the mounting bracket unit, that is, the boom assembly through the engagement with the portion. Further, the adapter unit and the dozer blade are connected by connecting means. Therefore, as one procedure, after connecting the adapter unit to the mounting bracket unit and then connecting the dozer blade to the adapter unit, the dozer blade is mounted on the boom assembly so as to be swingable. As another procedure, even if the dozer blade is connected to the adapter unit in advance and then the adapter unit is connected to the mounting bracket unit, as a result, the dozer blade is mounted on the boom assembly in a swingable manner. Become. In addition, since both the adapter unit and the dozer blade are configured so as to have a connection preparation posture suitable for the connection between the adapter unit and the dozer blade by the connection means in the self-standing posture, the adapter unit and the dozer by the connection means are configured. Connection with the blade is facilitated.

  In one preferred embodiment of the present invention, the connecting portion and the connected portion of the connecting means are each formed as a connecting bracket having a lock hole, and the connecting means includes the connecting portion and the connected portion. A locking pin inserted into the locking hole to lock the connection between the two. According to this, the connection between the adapter unit and the dozer blade is realized by a simple operation of aligning the respective lock holes and inserting the lock pins therein. In particular, the adapter unit and the dozer blade are guaranteed to have a ready-to-connect posture in which the axis of each lock hole is aligned on the same axis or aligned on the same axis by a simple displacement operation in each of the independent positions. The adapter unit and the dozer blade can be easily connected.

  In that case, as one of particularly preferred embodiments, if the lock hole is formed so that the direction of insertion of the lock pin into the lock hole is the falling direction of the lock pin due to gravity, The connecting operation between the adapter unit and the dozer blade is simplified.

  The bucket and the dozer blade need to be in a dumping posture for dumping scooped earth and sand by swinging the mounting bracket unit at a predetermined angle. However, since the bucket and the dozer blade are used for different purposes, their dumping postures are also different. In view of such a situation, in one of the preferred embodiments of the present invention, the dozer at the limit swing angle of the mounting bracket unit that creates the dumping posture of the bucket device that engages with the common engaging portion. It is configured to create a blade dump attitude. According to this configuration, at the limit swing angle of the mounting bracket unit, for example, at an angular position where the swing of the mounting bracket unit is forcibly stopped by the stopper, both the dozer blade and the dozer blade connected to the mounting bracket unit are dumped. Become posture. In other words, regardless of which is connected, the dump posture can be realized at the limit swing angle of the same mounting bracket unit, so that swing control of the mounting bracket unit for creating the dump posture is simplified.

It is a side view of the front part area | region of the tractor which equips the vehicle body front part with the boom assembly equipped with the dozer apparatus by this invention. It is a side view which shows mounting | wearing to the attachment bracket unit of a dozer apparatus. It is a perspective view of an adapter unit. It is a perspective view of a dozer blade. It is a side view which shows the connection procedure of an adapter unit and a dozer blade. It is a side view which shows the first half of the connection procedure of a mounting bracket unit and a dozer apparatus. It is a side view which shows the second half of the connection procedure of a mounting bracket unit and a dozer apparatus. It is a side view which shows another form of the connection procedure of a mounting bracket unit and a dozer apparatus. It is a side view which shows the connection of a mounting bracket unit and a bucket apparatus.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a side view of a front region of a tractor 1 equipped with a boom assembly equipped with a dozer device at the front of a vehicle body. The tractor 1 can perform multi-purpose work. As shown in FIG. 1, a boom assembly 3 can be mounted on the front of the vehicle body, and various work devices can be attached to the boom assembly 3 by attaching various work devices. It can be carried out. In the example of FIG. 1, a dozer device 1 is mounted on the boom assembly 3 in order to perform leveling work. This tractor 1 is well known, and a boom assembly 3 is attached to a vehicle body frame 12 supported on the ground by a front wheel 10 and a rear wheel (not shown).

  As is well known, the main components of the boom assembly 3 include a pair of left and right booms 32 arranged so as to sandwich the bonnet 13, a mast 31 pivotally connected to the rear end of the boom 32, and left and right The cross bar 33 connecting the booms 32 on the distal end side, and the mounting bracket unit 5 that extends over the distal ends of the left and right booms 32 and is swingably attached thereto. Further, side frames 2 are attached to both sides of the body frame 12. Each side frame 2 includes a lateral support member 21 having one end connected to the vehicle body frame 12 and extending outward in the transverse direction of the vehicle body, and a mast receiving portion 22 erected on the other end of the lateral support member 21. ing. The mast receiving portion 22 is partially open on the front side so that the mast 31 can be received from the front. When the mast 31 enters the mast receiving portion 22, as is well known, the mast 31 is held by the mast receiving portion 22 by the engagement pin and the mount pin. Thereby, the boom assembly 3 is supported by the vehicle body frame 12.

  As shown in FIG. 1, a stand 93 is attached to the lower surface on the tip side of the boom 32 so that it can be folded and stored. With this stand 93, the boom assembly 3 can be attached and detached when the tractor 1 is attached and detached. Become independent.

  The boom 32 is a square pipe structure having a substantially rectangular cross section, and is bent at the center in a boomerang shape. The cross bar 33 has a round pipe structure in which the left and right booms 32 are connected to the front end side of the bent portion. In order to turn the boom 32 in the vertical direction around the lateral pivot point formed at the pivot joint between the base end of the boom 32 and the mast 21, an intermediate portion of the mast 21 and an intermediate portion of the boom 32 are provided. A boom cylinder 91 is attached. Further, a swing (tilt) cylinder 92 is disposed on the tip end side of the boom 32, one end of which is connected to the middle portion of the boom 32, and the other end is the swing link 4 that swings the mounting bracket unit 5. It is connected to.

  As is clear from FIG. 2, the mounting bracket unit 5 includes a swing bracket portion 50 disposed in the tip region of each boom 32, and an engagement bracket portion 52 fixed to the front side of the swing bracket portion 50. The cross rod 51 which connects the both side walls of the rocking | fluctuation bracket part 50 is included. The swing bracket portion 50 is pivotally connected to the tip of the boom 32 at the lower rear end, and is folded in two at the upper rear end and is pivotally connected to one end of the swing link 4. The other end of the swing link 4 is pivotally connected to the boom 32. Further, the swing shaft of the swing link 4 is pivotally connected to the tilt cylinder 92. As a result, the mounting bracket unit 5 swings around the horizontal axis by the expansion and contraction of the tilt cylinder 92. The downward swing of the mounting bracket unit 5 is set to a predetermined limit swing angle by the stopper means 56. The stopper means 56 includes a contact member 56 a fixed to the boom 32 and a contact member 56 b fixed to the lower end of the mounting bracket unit 5. As the mounting bracket unit 5 swings due to the extension of the tilt cylinder 92, the contact member 56b approaches the contacted member 56a, and the contact member 56b contacts the contacted member 56a so that the mounting bracket unit 5 swings. The swing angle restricted by the stopper means 56 is the limit swing angle, and the dump posture of the bucket mounted on the boom 32 and the dozer device 1 is created at the angular position.

  In the mounting bracket unit 5, a receiving portion 53 that opens upward is formed at the front upper end of the engagement bracket portion 52, and the fixing pin 55 is inserted at the front lower end of the engagement bracket portion 52. The hole 54 is formed. The receiving portion 53 and the hole portion 54 are horizontal and extend in parallel to each other. That is, in this embodiment, the receiving portion 53 and the hole portion 54 constitute a common engaging portion. The common engagement portion engages with an engaged portion of the adapter unit 6 described below, thereby creating an engagement fixed state between the mounting bracket unit 5 and the adapter unit 6.

  As apparent from FIG. 3, the adapter main body 61 of the adapter unit 6 includes a cross member 62 and two engaged brackets 63 connected by the cross member 62, and the adapter main body 61 faces the mounting bracket unit 5. The surface on the side to be opened has a U-shaped cross section that is open. A support pin 64 that horizontally crosses between both side walls is attached to the upper end of the engaged bracket 63, and a horizontal lateral pin hole 65 is formed at the lower end. The support pin 64 is dimensioned to engage with the receiving portion 53 of the engagement bracket portion 52 of the mounting bracket unit 5, and the engagement of the pin hole 65 with the engagement bracket portion 52 entering the engaged bracket 63. Dimensions are set so that the hole portion 54 of the joint bracket portion 52 is coaxially aligned, the fixing pin 55 is inserted into the pin hole 65 and the hole portion 54, and the mounting bracket unit 5 and the adapter unit 6 are engaged and fixed. It has been. That is, in this embodiment, the support pin 64 and the pin hole 65 constitute an engaged portion that engages with the common engaging portion of the adapter unit 6.

  As apparent from FIG. 4, the dozer blade 8 is formed on a blade frame 80 having a plurality of reinforcing ribs, a blade plate 81 having a well-known shape attached thereto, and a lower surface of the blade frame 80. And a base plate 82. The height of the base plate 82 can be adjusted by using a shim 83, whereby the ground height at the lower end of the blade plate 81 can be set.

  As shown in FIGS. 3 and 4, the connecting means 7 for connecting the dozer blade 8 and the adapter unit 6 includes a pair of left and right connecting brackets 71 provided on the blade frame 81 of the dozer blade 8 as a connecting portion. And a pair of left and right connected brackets 73 provided on the adapter main body 61 of the adapter unit 6 as a connected portion to be connected to the connecting portion, and a T-shaped lock pin 75. In this embodiment, the connecting bracket 71 has a cylindrical portion 71a provided with a lock hole 72 that is a vertical vertical hole, and the connected bracket 73 has a protruding piece 73a that sandwiches the cylindrical portion of the connecting bracket 71 from above and below. Each of the projecting pieces is provided with a coaxial coaxially-locked hole 74 in the vertical direction. As can be understood from FIG. 5, when the dozer blade 8 and the adapter unit 6 are assembled so that the cylindrical portion 71 a just enters between the protruding pieces 73 a, the lock hole 74 and the locked hole 74 are aligned on the same axis. By inserting the T-shaped lock pin 75 into the lock hole 72 and the locked hole 74 aligned on the coaxial center, the connection between the dozer blade 8 and the adapter unit 6 is completed.

  The dozer blade 8 can be self-supporting with the base plate 82 as the grounding surface and, if necessary, the lower end of the blade plate 81 as its auxiliary grounding surface. Called. In this connection preparation posture, the lock hole 72 is oriented substantially in the vertical direction. Although not shown in the figure, a horizontal surface is formed on the lower surface of the adapter unit 6 so that the adapter unit 6 can stand on its own. The horizontal planes do not need to be continuously connected, and can exist at a plurality of positions spaced apart from each other. This self-supporting posture is referred to as a connection preparation posture with respect to the dozer blade 8 of the adapter unit 6. In this connection preparation posture, the locked hole 74 faces a direction inclined slightly obliquely from the vertical direction. Accordingly, when the dozer blade 8 and the adapter unit 6 that are both ready for connection are assembled so that the cylindrical portion 71a is just inserted between the protruding pieces 73a, either the dozer blade 8 or the adapter unit 6 can be used as it is. In a slightly tilted state, the lock hole 72 and the locked hole 74 are arranged on a substantially coaxial axis in the vertical direction. Therefore, the T-shaped lock pin 75 inserted from above can be easily moved by gravity. The head that has entered the locked hole 74 and horizontally extended is used as a stopper to be held in the locked hole 72 and the locked hole 74. In order to prevent the inserted T-shaped lock pin 75 from coming off, an L-shaped pressing metal member 76 for pressing the T-shaped lock pin 75 is attached to the adapter main body 61.

As described above, here, the dozer device includes the adapter unit 6, the dozer blade 8, and the connecting means 7 that connects the adapter unit 6 and the dozer blade 8. A procedure for mounting this dozer device on the mounting bracket unit 5 at the tip of the boom assembly 3 mounted on the tractor 1 will be described. In this example, since the dozer blade 8 and the adapter unit 7 are connected using the connecting means 7 in advance as a dozer device, the connecting procedure of the dozer blade 8 and the adapter unit 7 will be described first with reference to FIG. .
The adapter unit 6 and the dozer blade 8 are made to stand independently in the connection preparation posture (# 01). The adapter unit 6 that is lighter than the dozer blade 8 is moved to insert the cylindrical portion 71a on the dozer blade 8 side between the protruding pieces 73a on the adapter unit 6 side (# 02). If necessary, while the adapter unit 6 is tilted, the lock hole 74 and the locked hole 74 are aligned with the shaft center, and the T-shaped lock pin 75 is inserted from above (# 03). The head of the T-shaped lock pin 75 is pressed down by the presser fitting 76. (# 04).

  When the dozer device is assembled, the dozer device is attached to the mounting bracket unit 5 by operating the tractor 1 and the boom assembly 3 according to the procedure shown in FIGS. 6 and 7. First, the boom assembly 3 is operated so that the engaging bracket portion 52 of the mounting bracket unit 5 faces the engaged bracket 63 of the adapter unit 6 of the adapter unit 6 that is self-supporting and that has been assembled. To bring the mounting bracket unit 5 closer (# 11). The mounting bracket unit 5 is operated so that the receiving portion 53 of the engaging bracket portion 52 holds the support pin 64 of the engaged bracket 63 from below (# 12). When the receiving portion 53 holds the support pin 64. The mounting bracket unit 5 is swung, and the dozer device is drawn so that the hole 54 of the engaging bracket 52 and the pin hole 65 of the engaged bracket 63 are coaxial (# 13). When the hole 54 and the pin hole 65 are coaxial, the fixing pin 55 is inserted into the hole 54 and the pin hole 65 is prevented from coming off (# 14). Thus, the mounting of the dozer device to the mounting bracket unit 5 is completed, and the dozer device can be positioned at a desired rotation angle by swinging the mounting bracket unit 5 (# 15). Thereafter, along with operations such as forward and backward movement of the tractor 1 by the driver's steering operation, the boom 32 is raised and lowered by the boom cylinder 91 extending and retracting and the dozer blade 8 is tilted backward and forward by the tilt cylinder 92 extending and retracting operation. By performing the tilting operation, the dozer operation is performed.

  For example, when performing earth removal work, the dozer blade 8 is tilted backward by the tilt cylinder 92 and the tractor 1 is moved forward. In addition, when performing a rough surface forming operation, the tilt cylinder 92 is operated in the extending direction so that the dozer blade 8 is tilted forward to achieve a predetermined rotation angle, and the dozer blade 8 is raised as the tractor 1 moves forward. By proceeding, a rough surface is formed.

  In the description using FIG. 6 and FIG. 7, the mounting of the dozer device to the mounting bracket unit 5 is performed after the dozer blade 8 and the adapter unit 6 are first assembled to complete the dozer device. However, instead of this, as shown in FIG. 8, the adapter unit 6 is first attached to the mounting bracket unit 5 (# 31), and then the adapter unit 6 is moved through the forward operation of the tractor 1 and the operation of the boom assembly 3. The dozer blade 8 may be attached to the adapter unit 6 (# 33) close to the dozer blade 8 (# 32).

  As shown in FIG. 9, the engaging bracket portion 52 of the mounting bracket unit 5 is formed as a common engaging portion, and the bucket 9 is also provided with an engaged bracket 9 a similar to the engaged bracket 63 of the adapter unit 6. Therefore, the bucket 9 can be mounted on the mounting bracket unit 5 in the same procedure as the above-described procedure for mounting the dozer device. The engaged bracket 9 a is provided with support pins 94 and pin holes 95 having the same specifications as the support pins 64 and pin holes 65 of the engaged bracket 63. The swinging angle of the mounting bracket unit 5 is restricted to the limit swinging angle by the stopper means 56 described above, and the dump posture of the bucket 9 and the dozer blade 8 mounted on the mounting bracket unit 5 is created at this angular position. It is.

[Another embodiment]
(1) The connecting bracket 71 on the dozer blade 8 side and the connected bracket 73 on the adapter unit 6 side that constitute the connecting means 7 may be attached in reverse, and their shapes can be variously modified. .
(2) In the embodiment described above, the contact member 56a and the contact member 56b constituting the stopper means 56 are provided in the boom 32 and the mounting bracket unit 5, and the limit swing angle thereof is the same as that of the bucket 9. Common to the dozer blade 8. However, for example, by providing the contact member 56 a in the mounting bracket unit 5 and providing the contact member 56 b in the bucket 9 or the dozer blade 8, it is possible to set unique limit swing angles.

1: Tractor 3: Boom assembly 32: Boom 4: Swing link 5: Mounting bracket unit 50: Swing bracket part 51: Cross rod 52: Engaging bracket part 53: Receiving part (common engaging part)
54: Hole 55: Fixing pin 56: Stopper means 6: Adapter unit 61: Adapter body 62: Cross member 63: Engaged bracket (engaged part)
64: Support pin 65: Pin hole 7: Connection means 71: Connection bracket (connection part)
72: Lock hole 73: Connected bracket (connected part)
74: Locked hole 75: T-type lock pin 76: Press fitting 8: Dozer blade 80: Blade frame 81: Blade plate 82: Base plate 91: Boom cylinder 92: Tilt cylinder

Claims (4)

A dozer device attached to a swingable mounting bracket unit provided at a tip of a boom assembly provided in a work vehicle,
A dozer blade has an engaged portion engageable with a common engaging portion provided in the mounting bracket unit, and is connected to the mounting bracket unit by engagement of the common engaging portion and the engaged portion. An adapter unit, a connecting part provided in the adapter unit, and a connected part provided in the dozer blade, and a connecting means for connecting the adapter unit and the dozer blade, The dozer blade can be self-supporting in a ready-to-connect posture suitable for connection by the connecting means, and the adapter unit can be engaged and connected to the mounting bracket unit in the ready-to-connect posture.   The connecting portion and the connected portion of the connecting means are each formed as a connecting bracket having a lock hole, and the connecting means is configured to lock the connection between the connecting portion and the connected portion. The dozer device according to claim 1, further comprising a lock pin inserted into the housing.   The dozer device according to claim 2, wherein the lock hole is formed so that an insertion direction of the lock pin into the lock hole is a falling direction of the lock pin due to gravity.   The dozer according to any one of claims 1 to 3, wherein a dumping posture of the dozer blade is created at a limit swing angle of the mounting bracket unit that creates a dumping posture of a bucket device that engages with the common engagement portion. apparatus.

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