JP5836663B2 - Hydraulic equipment for work machine vehicles - Google Patents

Description

  The present invention relates to a hydraulic device for a work machine vehicle.

  A work machine (loader) that is attached to a vehicle such as a tractor and that is operated by hydraulic pressure from a hydraulic pump that is driven by the engine of the vehicle is detachably connected to the vehicle, and the hydraulic system of both the vehicle and the work machine has a plurality of joints And is detachably connected via a hydraulic device having As such a hydraulic device, for example, a hydraulic device 100 as shown in FIG. 20 is known (see Patent Document 1: Japanese Patent No. 3616408).

  The hydraulic apparatus 100 includes a vehicle-side joint housing 100a and a work machine-side joint housing 100b. The vehicle-side joint housing 100a is fixed near a cockpit of a vehicle 120 such as a tractor with a plurality of joints 110 arranged upward. It is fixed to the mast cradle 130. The work machine 140 includes, for example, a bucket 160 connected to the tip of the swing arm 150 and includes a hydraulic cylinder 170 that rotates the swing arm 150 and the bucket 160. The mast 180 at the base end of the swing arm 150 is detachably pin-coupled to the mast cradle 130 of the vehicle 120.

  The plurality of hydraulic hoses 190 connected to the hydraulic cylinder 170 of the work machine 140 are connected to the corresponding joint 200 of the work machine side joint housing 100b. Then, by connecting the work machine side joint housing 100b to the vehicle side joint housing 100a, the plurality of joints 200 can be collectively connected to the plurality of joints 110 of the vehicle side joint housing 100a. . The work machine side joint housing 100b is provided with an operation handle (not shown) for connection to the vehicle side joint housing 100a.

Japanese Patent No. 3616408

  In the conventional hydraulic system, a plurality of joints are connected together as described above, but each joint is a non-spill type exclusive product in order to prevent oil leakage from each joint when the housing is attached or detached. There are many things and there is a problem that it is expensive in terms of cost. The non-spill type is a structure in which oil does not leak out of the joint when the coupler is attached or detached. The work machine 140 is equipped with an electromagnetic solenoid for operating the hydraulic cylinder 170, and an electrical connector for connecting the electromagnetic solenoid to an electric system on the vehicle side is arranged at a position different from the hydraulic device. Yes. For this reason, it is necessary to separately perform the two operations of attaching / detaching the hydraulic device and attaching / detaching the electric connector at the time of attaching / detaching the work machine, which is troublesome and time-consuming.

  An object of the present invention is to provide a hydraulic apparatus that can simultaneously attach and detach an electric connector together with the detachment of the hydraulic apparatus.

  The invention according to claim 1 is a hydraulic system joint desorption apparatus between a vehicle and a work machine in a work machine vehicle in which a work machine detachably attached to the vehicle is driven by hydraulic pressure from a hydraulic drive system of the vehicle. The joint detaching device has a vehicle side joint housing and a work implement side joint housing that are attachable / detachable in the vertical direction, and the vehicle side joint housing faces upward and tilts a first detachment surface to which the work implement side joint housing is attached. The first terminal of the electrical connector connected to the electrical system of the vehicle with an electrical cord is disposed on the upward and inclined portion of the first detachable surface that is fixed to the vehicle in a state, and the upward and inclined A plurality of first joints connected to a vehicle hydraulic drive system and a plurality of hydraulic hoses are disposed in a portion lower than the first terminal of the first detachable surface in a state, and the work machine side joint housing includes: A second detachable surface that can be attached to the first detachable surface of the double-sided joint housing, a first terminal of the electrical connector, a detachable second terminal, a detachable joint of the vehicle-side joint, and a plurality of hydraulic equipment of the work machine It is the joint detachment | desorption apparatus of the working machine vehicle which has arrange | positioned the some 2nd joint connected with this hydraulic hose.

When the first terminal of the electrical connector is arranged in addition to the plurality of hydraulic first joints in the vehicle side joint housing, the first terminal of the electrical connector approaches the first joint of the hydraulic system so that the oil of the first terminal Adhesion prevention becomes a problem. The present invention solves this problem by inclining the first attachment / detachment surface of the vehicle-side joint housing and disposing the first terminal of the electrical connector at a high portion of the inclined first attachment / detachment surface.
Thereby, it is possible to prevent the oil from flowing to the first terminal side of the electrical connector, and there is no fear that the first terminal gets wet with the oil and the dust adheres, causing the electrical connector to have poor contact. The terms “high portion” and “low portion” mean that the first terminal is disposed at a position relatively higher than the plurality of first joints. It does not indicate a specific site.

A second aspect of the present invention is the joint demounting device according to the first aspect, wherein an oil sump in which oil leaked from the first joint or the second joint is accumulated in the vehicle side joint housing.
By disposing the oil reservoir in this manner, it is possible to prevent oil from being scattered around the joint even when the hydraulic device is used for a long period of time.

According to a third aspect of the present invention, in the first or second aspect, at least one of the first and second attachment surfaces of the work machine side joint housing serves as a guide when the work machine side joint housing is attached to the vehicle side joint housing. A joint attaching / detaching device characterized in that a guide pin is disposed and at least one guide hole capable of receiving the guide pin is formed in a first attaching / detaching surface of the vehicle side joint housing.
Thereby, the removal | desorption of a housing becomes smooth.

According to a fourth aspect of the present invention, in the second or third aspect, an oil receiving hole surrounding the first joint is formed on the first attachment / detachment surface of the vehicle side joint housing, and the oil receiving hole is formed in the oil reservoir. A joint detaching device characterized by being in communication.
Thereby, recovery of oil leaking from the joint and prevention of scattering are further ensured.

A fifth aspect of the present invention provides the joint according to the fourth aspect, wherein a part of the communication path communicating from the oil receiving hole to the oil reservoir is communicated with at least one guide hole of the vehicle side joint housing. Desorption device.
As a result, the guide hole is lubricated with oil, so that the guide pin can be inserted and removed smoothly.

According to a sixth aspect of the present invention, in any one of the first to fifth aspects, the first terminal of the electrical connector on the first detachable surface of the vehicle side joint housing and the cover that covers the first joint are arranged to be openable and closable. A joint detaching device characterized by the above.
Accordingly, it is possible to prevent dust and the like from adhering to the first terminal of the electrical connector and the first joint of the hydraulic system in the vehicle with the work machine removed.

  According to the present invention, the vehicle side joint housing is fixedly disposed on the vehicle with the first detachable surface facing upward and inclined, and the first terminal of the electrical connector is disposed at a high portion of the inclined first detachable surface. Since a plurality of hydraulic system first joints are arranged in a lower part than one terminal, even if oil leaks from each joint when the housing is detached, this oil flows only to the lower one Oil does not flow to the first terminal side of the electrical connector arranged in the. For this reason, there is no fear that the first terminal gets wet with oil, dust adheres to the terminal, and the contact failure of the electrical connector occurs.

1 is a front view of a hydraulic apparatus according to an embodiment of the present invention. 1 is a plan view of a hydraulic apparatus according to an embodiment of the present invention. It is a front view of the vehicle side joint housing of the hydraulic apparatus which concerns on embodiment of this invention. It is a side view of the vehicle with a working machine provided with the hydraulic apparatus which concerns on embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 shows a hydraulic device according to an embodiment of the present invention, in which (A) is a perspective view, (B) is a side view when an operation lever is locked, and (C) is a side view when an operation lever is unlocked. BRIEF DESCRIPTION OF THE DRAWINGS The vehicle side joint housing of the hydraulic device which concerns on embodiment of this invention is shown, (A) is a top view, (B) is a left view, (C) is a right view. It is a rear view of the vehicle side joint housing of the hydraulic apparatus which concerns on embodiment of this invention. It is the DD sectional view taken on the line of FIG. (A) is CC sectional view taken on the line of FIG. 6 (A). FIG. 7B is a cross-sectional view taken along the line B-B in FIG. (C) is a sectional view of a general-purpose joint used in the present invention. It is an enlarged front view of the vehicle side joint housing of the hydraulic apparatus which concerns on embodiment of this invention. It is the EE arrow directional cross-sectional view of FIG. It is sectional drawing which synthesize | combined the BB arrow sectional drawing of FIG. 13, and DD sectional view taken on the line. It is a top view of the working machine side joint housing of the hydraulic apparatus which concerns on embodiment of this invention. It is AA arrow sectional drawing of FIG. It is CC sectional view taken on the line of FIG. BRIEF DESCRIPTION OF THE DRAWINGS It is sectional drawing just before mounting the working machine side joint housing of the hydraulic device which concerns on embodiment of this invention to a vehicle side joint housing, Comprising: (A) is sectional drawing of joint P1, P2, and joint N1, N2, (B) ) Is a cross-sectional view of the joints T1 and T2. It is sectional drawing after attaching the working machine side joint housing of the hydraulic device which concerns on embodiment of this invention to the vehicle side joint housing, Comprising: (A) is sectional drawing of joint P1, P2, and joint N1, N2, (B) ) Is a cross-sectional view of the joints T1 and T2. It is a figure which shows the hydraulic circuit of the state just before connecting the housing of the vehicle side and working machine side of the hydraulic apparatus which concerns on embodiment of this invention. It is a figure which shows the hydraulic circuit of the state which connected the housing of the vehicle side of the hydraulic apparatus which concerns on embodiment of this invention, and the working machine side. It is a side view of the conventional vehicle with a working machine.

  Embodiments of a hydraulic apparatus according to the present invention will be described below with reference to the drawings. As shown in FIGS. 1-3, the hydraulic apparatus 10 of this invention has the metal vehicle side joint housing 10a and the working machine side joint housing 10b. A resin cover 11 is attached to the vehicle-side joint housing 10a to protect the joint and the electrical connector terminal when the work machine-side joint housing 10b is removed. An operation lever 12 for connecting the two housings 10a and 10b is attached to the work machine side joint housing 10b. In the following description, the vehicle side joint housing 10a is referred to as a lower housing 10a or a lower housing 10a, and the work machine side joint housing 10b is referred to as an upper housing 10b or an upper housing 10b as necessary.

  The vehicle side joint housing 10a of the hydraulic apparatus 10 is fixedly disposed in an inclined state on the side surface of the mast base 130 of the vehicle 120 such as a tractor as shown in FIG. 4 (the hydraulic hose is not shown). As will be described later, this inclined arrangement is to prevent the terminal of the electrical connector from getting wet with the oil leaked from each joint, and more specifically, the upper surface of the vehicle side joint housing 10a is the front with the traveling direction of the work machine 140 as the front. It is arranged at an inclination angle of 15 ° so as to have a downward inclination. This inclination angle of 15 ° is merely an example, and it is a matter of course that the present invention is not limited to this inclination angle, and the inclination angle may be increased or decreased as necessary. Further, the reason why the upper surface of the vehicle side joint housing 10a is inclined so as to be inclined forward is to arrange the first terminal of the electrical connector at a high portion. Therefore, when the first terminal is disposed on the right side of the vehicle-side joint housing 10a as opposed to FIG. 4, the inclination direction is reversed, that is, the upper surface of the vehicle-side joint housing 10a is inclined downwardly. Deploy.

  The vehicle-side joint housing 10a has a substantially rectangular parallelepiped shape as shown in FIG. 3, and its upper surface constitutes a first detaching surface 13 for detaching from the work machine-side joint housing 10b. Three joints P1, N1, T1 and a first terminal E1 of an electrical connector are arranged on the first detachable surface 13 of the vehicle side joint housing 10a, and these are the three joints P2, N2, T2 and the second terminal E2 of the electrical connector are collectively connected.

  Here, an outline of a hydraulic circuit connected to the hydraulic apparatus 10 will be described. The hydraulic circuit normally includes a P circuit that extracts hydraulic pressure from the pump of the vehicle 120, and an N circuit and T circuit that return hydraulic pressure from the work implement 140 to the vehicle 120. “P, N, T” used as reference numerals for the respective joints described above indicate joints connected to the P circuit, the N circuit, and the T circuit, respectively. The N circuit is a power beyond circuit for sending hydraulic oil to other hydraulic equipment in the vehicle 120 body via the N circuit when the operation valve of the work machine 140 is neutral. The T circuit is a tank circuit or a drain circuit that returns hydraulic pressure to the tank of the vehicle 120 when the operation valve of the work machine 140 is operated.

  In a state where the work machine 140 is mounted on the vehicle 120, the oil supplied from the pump of the vehicle 120 circulates through the hydraulic circuit of the work machine 140 through the hydraulic circuit (P, N, T), and returns to the vehicle 120 again. When the work machine 140 is detached from the vehicle 120, the upper and lower housings 10a and 10b of the hydraulic device 10 must be removed at the same time. Even in this detached state, the oil supplied from the pump of the vehicle 120 is supplied to the N circuit of the vehicle 120. Need to return. For this purpose, the P circuit and the N circuit are normally bypassed with a hose or the like.

  As shown in FIG. 3, an electrical cord 14 extending downward from the housing 10 a is connected to the electrical connector terminal E <b> 1 of the vehicle-side joint housing 10 a, and the tip connector 14 a of the electrical cord 14 is connected to the electrical system of the vehicle 120. It has become. As shown in FIGS. 18 and 19, a main relief valve 20 and a shut-off valve 21 are disposed inside the vehicle side joint housing 10a. The operation of these valves 20 and 21 will be described later.

  5 (A) to 5 (C) show the appearance of the hydraulic device 10, and FIGS. 5 (A) and 5 (B) show the operation lever 12 lowered to bring the upper and lower housings 10a and 10b into the connection locked state. is there. FIG. 5C shows a state in which the operating lever 12 is raised so that the upper housing 10b can be detached from the lower housing 10a. In either case, the cover 11 is open.

  FIG. 6 shows only the lower housing 10a after the upper housing 10b is removed from the hydraulic device 10, and the cam grooves 12a of the operation lever 12 are engaged with the upper portions of the left and right side surfaces of the lower housing 10a. Shaft portions 50 and 51 are fixedly arranged. Three first joints P1, N1, and T1 and a first terminal E1 of the electrical connector are disposed on the upper surface of the lower housing 10a, that is, the first detaching surface 13, respectively. As described above, the lower housing 10a is disposed such that the first detaching surface 13 which is the upper surface of the lower housing 10a is inclined forwardly downward, so that the right side in FIG. 6A is low and the left side is high. And the 1st terminal E1 of an electrical connector is arrange | positioned in the position near the front side corner | angular part on the left side. A first joint T1 is disposed on the right side of the first terminal E1 of the electrical connector, and two first joints P1 and N1 are disposed on the back side of the first joint T1. The first terminal E1 of the electrical connector is disposed on the leftmost side of the upper surface of the lower housing 10a, and the first joint N1, the first joint T1, and the first joint P1 are arranged in this order on the right side.

  In addition to this, on the upper surface of the lower housing 10a, a pin portion 21a of the shut-off valve 21 is disposed in a protruding state between the first joint P1 and the first joint N1. A first guide hole 30 is formed on the front side of the pin portion 21 a of the shutoff valve 21. Further, a second guide hole 31 is formed on the right front side of the upper surface. The first guide hole 30 and the second guide hole 31 are for inserting a first guide pin 61 and a second guide pin 62, which will be described later, of the upper housing 10b. The lower end portion of the first guide hole 30 is closed at a predetermined depth, but the lower end portion of the second guide hole 31 communicates with an oil reservoir 40 described later.

  On both the left and right sides of the upper part of the lower housing 10a, fulcrum pins 32 and 33 for rotatably supporting the resin cover 11 are arranged, and the cover 11 is in a vertical state with the fulcrum pins 32 and 33 as the center. It is designed to rotate at an angle of approximately 90 degrees during the horizontal state. The cover 11 is provided with vertically long dome portions 11a to 11d for receiving the cover 11 so that the bottom surface does not interfere with the three first joints P1, N1, T1 and the first terminal E1 of the electrical connector when the cover 11 is closed. Is formed. Torsion springs 34 and 35 are attached to the fulcrum pins 32 and 33, and always bias the cover 11 in the closing direction. FIG. 7 is a view of the lower housing 10a from the rear side, and torsion springs 34 and 35 for urging the cover 11 to the left and right are visible.

  FIG. 8 shows a cross section taken along line D-D in FIG. 6A, and the center is the first joint T1. A cylindrical adapter 38T extending downward is connected to the lower end of the first joint T1. The lower end of the cylindrical adapter 38T is connected to a tank circuit on the vehicle 120 side via a hydraulic hose (not shown). A first terminal E1 of the electrical connector is disposed on the left side of the first joint T1, and a bottomed cylindrical resin oil reservoir 40 is disposed on the right side of the first joint T1. This oil sump 40 is for temporarily storing the oil leaked from each joint, and its upper end 40a is lowered so that the oil can be removed and drained when a predetermined amount of oil accumulates. Screwed to the lower surface of the side housing 10a.

  In the lower housing 10a to which the upper end portion 40a of the oil sump 40 is screwed, a vertical oil hole 41 penetrating to the first detaching surface 13 which is the upper surface of the housing 10a is formed as shown in FIG. The vertical oil hole 41 also serves as a second guide hole 31 into which a later-described second guide pin 62 can be inserted. On the other hand, as shown in FIG. 11, lateral oil holes 42 and 43 parallel to each other are formed in the lower housing 10a. The lateral oil holes 42 and 43 are formed from the front side surface to the back side of the lower housing 10a, and the distal ends of the lateral oil holes 42 and 43 are formed around the joints of the first joints P1 and N1. It is connected to the circular oil receiving holes 44 and 45. The lateral oil holes 42 and 43 are formed by drilling, and the ends thereof are closed by plugs 24 and 25 as shown in FIGS. 3 and 10 (the plugs 24 and 25 are omitted in FIG. 1). 3 and 10 is a plug that closes the end of the lateral hole 48 in FIG. 1, and this lateral hole 48 extends from the adapter 38P of the first joint P1 to the main relief valve 20 (see FIGS. 18 and 19). 8 and communicates with the adapter 38T of the first joint T1 as shown in FIG.

  The lateral oil holes 42 and 43 are connected to a circular oil receiving hole 46 formed around the first joint T1 in the middle thereof. Accordingly, the oil leaked from the first joint P1 flows into the oil reservoir 40 via the oil receiving hole 44 → the lateral oil hole 42 → the vertical oil hole 41 (second guide hole 31). And the inner surface of the 2nd guide hole 31 gets wet with oil in the middle of this oil flow.

  Further, part of the oil leaking from the first joint N1 flows into the first guide hole 30 via the oil receiving hole 45 → the lateral oil hole 43 so that the inner surface of the first guide hole 30 gets wet with the oil. It has become. The remaining oil flows into the oil reservoir 40 via the lateral oil hole 43 → the oil receiving hole 46 → the lateral oil hole 42 → the vertical oil hole 41 (second guide hole 31). Thus, oil flows into the oil reservoir 40 through the two flow paths from the first joint P1 and the first joint N1.

  FIG. 9 shows the first joints P <b> 1 and N <b> 1 and the shutoff valve 21. The first joints P1 and N1 have a common structure and the same structure as the male side 22m of the conventional general-purpose joint 22 in FIG. 9C. And it can be inserted into the female side 22f from which some parts (sleeve 22a, spring 22b, ball 22c) of the general-purpose joint 22 are removed. The female side 22f constitutes second joints P2 and N2 arranged in the upper housing 10b (see FIG. 14). The first joint T1 described above is slightly larger in diameter than the first joints P1 and N1, but has the same structure as the male side 22m of the general-purpose joint 22, and the female side of the first joint T1 is disposed in the upper housing 100b. A two joint T2 is formed (see FIG. 15). The part removed in FIG. 9C is originally intended to lock the joints on the male side and the female side, but the hydraulic device 10 of the present invention includes the upper and lower housings 10a including a plurality of joints with the operation lever 12. The parts are omitted because of the structure in which 10b is locked together.

  The shut-off valve 21 is disposed between the first joints P1 and N1 as shown in FIGS. 16 and 17 (the joints are arranged oppositely to FIG. 9). The lower part of the shut-off valve 21 is closed by a plug 23, and the shut-off valve 21 is urged upward by a spring 72 disposed between the plug 23 and the shut-off valve 21. The pin portion 21a at the upper end of the shut-off valve 21 protrudes from the upper surface (first detachable surface 13) of the lower housing 10a by a predetermined length, and the shut when the pin portion 21a is pressed by the second detachable surface 16 of the upper housing 10b. The off valve 21 is pushed downward. An arc-shaped notch 11e is formed on the base side of the cover 11 so as not to interfere with the pin portion 21a when the cover 11 is closed.

  Two lateral holes 70 and 71 are connected to the shut-off valve 21 in a stepped manner. The ends of the horizontal holes 70 and 71 are closed by plugs 26 and 27 as shown in FIGS. The upper lateral hole 70 is connected to the upstream (lower) adapter 38P of the first joint P1, and the lower lateral hole 71 is connected to the downstream (lower) adapter 38N of the first joint N1. . And when the pin part 21a of the shut-off valve 21 protrudes with the force of the spring 72, the horizontal holes 70 and 71 communicate with each other. On the other hand, when the pin portion 21a of the shutoff valve 21 is pushed down by the second detaching surface 16 of the upper housing 100b, the communication between the lateral holes 70 and 71 is blocked. When the upper and lower housings 10a and 10b are separated as shown in FIG. 16 in order to separate the work machine 140 from the vehicle 120, the upper and lower three joints are closed by the biasing force of the built-in spring and supplied from the pump side of the vehicle 120. The oil is returned to the N circuit via the shut-off valve 21.

  FIG. 10 is an enlarged view of FIG. 3, and FIG. 11 is a plan view of a cross section cut at the height of the lateral oil holes 42 and 43 in FIG. 11, the relationship between the oil receiving holes 44 to 46 and the horizontal oil holes 42 and 43 and the relationship between the horizontal oil holes 42 and 43 and the vertical oil holes 41 are known.

  As shown in FIGS. 12 and 13, the upper housing 10b has three second joints corresponding to the positions of the three first joints P1, N1, T1 of the lower housing 10a and the first terminal E1 of the electrical connector. Joints P2, N2, and T2 and a second terminal E2 of the electrical connector are arranged. The electric cord 60 is connected to the second terminal E2 of the electric connector, and the tip connectors 60a and 60b of the electric cord 60 are connected to an electromagnetic solenoid (not shown) attached to the work machine 140 of FIG.

  Further, a first guide pin 61 and a first guide pin 62 that can be inserted into the two guide holes 30 and 31 of the lower housing 10a are attached to the upper housing 10b downward. The guide pins 61 and 62 and the guide holes 30 and 31 are not indispensable for attaching and detaching the upper and lower housings 10a and 10b, but if they are present, the upper and lower housings 10a and 10b can be attached and detached smoothly.

  As shown in FIG. 12, a rotating shaft 63 extending in the left-right direction is disposed in the upper housing 10 b, and the base end portion of the operation lever 12 is fixed to the left end of the rotating shaft 63. Further, a plate member 15 having the same shape as that of the base end side of the operation lever 12 is fixed to the right end of the rotating shaft as shown in FIG. A handle portion 12 b serving as a handle is connected to the distal end side of the operation lever 12. When the handle portion 12b is rotated downward when the two housings 10a and 10b are connected, the handle portion 12b is positioned on the lower side on the near side of the lower housing 10a as shown in FIGS. 5A and 5B. When the connection between 10a and 10b is released, the upper housing 10b is positioned on the front side.

  As shown in FIGS. 5A to 5C, the operation lever 12 is formed with an arcuate cam groove 12 a centered at a position slightly decentered from the rotation shaft 63. The cam groove 12a is for pulling the shaft portions 50 and 51 of the vehicle-side joint housing 10a to the work machine-side joint housing 10b. The cam groove 12a is a distance from the rotary shaft 63 as it goes from the open end to the back end. Is configured to be shorter. In addition, a lock pin 64 is disposed in the middle portion of the operation lever 12. The lock pin 64 is for fixing the operation lever 12 in the lock position, and is always biased toward the side surface of the lower housing 10a by a spring 65.

  A chamfered portion C on which the lock pin 64 rides is formed at the corner on the left front side of the lower housing 10a. The chamfered portion C is formed at an angle of about 45 °, and the lock pin 64 slides the chamfered portion C from the near side to the far side while lowering the operation lever 12, and is moved to the left side surface of the lower housing 100b. It is configured to ride.

  A lock hole 66 is formed on the left side surface of the lower housing 10a as shown in FIG. 6B. The lock pin 64 is inserted into the lock hole 66 in a state where the operation lever 12 is lowered and the housings 10a and 10b are connected to each other. Is supposed to enter. Therefore, in this locked state, the operation lever 12 does not naturally rotate upward and the housings 10a and 10b are not separated from each other. A ring 67 serving as a handle is attached to the head of the lock pin 64. By pulling the ring 67 against the spring 65, the lock pin 64 can be removed from the lock hole 66 and the operation lever 12 can be rotated upward. It becomes like this.

  The operation lever 12 can be attached to the vehicle-side joint housing 10a. However, when the operation lever 12 remains on the vehicle 120 side when the work implement 140 is removed, it becomes an obstacle. For this reason, the operation lever 12 is preferably attached to the work machine side joint housing 10b.

  Next, the flow of oil will be described with reference to FIGS. When the work machine 140 is separated from the vehicle 120 and the upper and lower housings 10a and 10b are separated as shown in FIG. 16, the upper and lower three joints are closed by the biasing force of the built-in spring, while the shutoff valve 21 is in the raised position. is open. This state is shown by the hydraulic circuit in FIG. Therefore, the oil supplied from the pump of the vehicle 120 to the adapter 38P by the P circuit is returned to the vehicle 120 from the adapter 38N on the opposite side via the shutoff valve 21 and supplied to the other hydraulic equipment on the vehicle 120 side. (Formation of a power beyond circuit).

  Next, the work implement 140 is connected to the vehicle 120, the cover 11 of the vehicle-side joint housing 10a is opened, and the work implement-side joint housing 10b is attached to the vehicle-side joint housing 10a. Then, when the operation lever 11 is rotated downward to lock the upper and lower housings 10a and 10b, each joint is connected to the other joint, and the hydraulic system of the work machine 140 is connected to the vehicle hydraulic system as shown in FIG. Is done. At the same time, the pin portion 21a of the shutoff valve 21 is pushed down by the second detaching surface 16 of the upper housing 100b, and the communication between the lateral holes 70 and 71 is blocked. This state is shown by the hydraulic circuit in FIG. Thereby, the oil supplied to the adapter 38P from the pump of the vehicle 120 is supplied to the hydraulic cylinder 170 through the first joint P1, the second joint P2, and the hydraulic hose and the control valve on the work machine 140 side. The oil discharged from the shortened side port of the hydraulic cylinder 170 is discharged to the T circuit of the vehicle 120 through the second joint T2 and the first joint T1. Further, when excessive hydraulic pressure is generated in the P circuit due to a load or the like acting on the hydraulic cylinder 170, the oil is discharged to the T circuit through the main relief valve 20 in FIG.

  When the upper and lower housings 10a and 10b are attached and detached, the first and second guide pins 61 and 62 are inserted into and removed from the first guide hole 30 and the second guide hole 31, so that the upper and lower housings 10a and 10b can be attached and detached smoothly. Is called. Since the attaching / detaching direction is regulated by the two guide pins 61, 62, no positional deviation occurs between the upper and lower housings 10a, 10b, thereby preventing the terminals of the electrical connector and the hydraulic joint from being damaged.

  The oil leaked from the joints when the upper and lower housings 10a and 10b are attached and detached is stored in oil through the oil receiving holes 44 to 46, the horizontal oil holes 42 and 43, and the vertical oil holes 41 (second guide holes 31) in FIG. 40 is recovered. At this time, since the lower housing 10a is fixed to the vehicle 120 with a right inclination, the range in which oil flows is lower than the first terminal E1 of the electrical connector. For this reason, there is no fear that the first terminal E1 gets wet with oil and dust adheres to cause a contact failure of the electrical connector.

  Further, the present invention effectively uses the oil leaked from each joint as described above as the lubricating oil for the first guide pin 61 and the second guide pin 62. That is, the first guide hole 30 and the second guide hole 31 are wetted by the leaked oil, so that the first guide pin 61 and the second guide pin 62 can be smoothly inserted and removed by the lubricating action of the oil. Therefore, the upper and lower housings 10a and 10b can be easily attached and detached without periodically lubricating the first guide pins 61 and 62.

  Next, when disconnecting the work implement 140 from the vehicle 120, the reverse operation is performed. First, the lock pin 64 of the operation lever 12 is pulled to rotate the operation lever 12 upward, and the upper work machine side joint housing 10b is removed from the lower vehicle side joint housing 10a. The removed work machine side joint housing 10 b is returned to a predetermined position of the work machine 140. When the upper housing 10b is removed, the cover 11 of the lower housing 10a is automatically closed by the force of the torsion springs 34 and 35, and the first terminal E1 of the electrical connector disposed on the first attaching / detaching surface 13 of the lower housing 10a and the hydraulic system The first joints P1, N1, and T1 are covered with the cover 11. After the upper and lower housings 10a and 10b are thus separated, the work machine 140 is separated from the vehicle 120.

  The embodiment of the present invention has been described above, but the present invention is not limited to this embodiment, and various modifications can be made within the scope of the technical idea of the claims. For example, in the above-described embodiment, the first and second joints of the upper and lower housings have been described for three hydraulic devices, but the number of joints can be four or more, and the number of terminals of the electrical connector can be two or more. Good.

DESCRIPTION OF SYMBOLS 10 Hydraulic apparatus 10a Vehicle side joint housing 10b Work machine side joint housing 11 Cover 12 Operation lever 13 First attachment / detachment surface 16 of vehicle side joint housing Second attachment / detachment surface 20 of work machine side joint housing Main relief valve 21 Shutoff valve 30, 31 Guide hole 40 Oil reservoir 44-46 Oil receiving hole 61, 62 Guide pin 120 Vehicle 140 Working machine 170 Hydraulic cylinder E1 First terminal E2 of electric connector Second terminal P1, N1, T1 of first connector P2, N2 of electric connector , T2 second joint

Claims (2)

A hydraulic joint coupling / removing device between a vehicle and a working machine in a working machine vehicle in which a working machine detachably attached to the vehicle is driven by hydraulic pressure from a hydraulic driving system of the vehicle. A vehicle-side joint housing and a work machine-side joint housing that are detachable in the direction;
The vehicle-side joint housing is fixedly disposed on the vehicle with a first detachable surface to which the work implement-side joint housing is attached facing upward and inclined, and the vehicle-side joint housing A first terminal of an electrical connector connected to the electrical system of the vehicle by an electrical cord, and a vehicle hydraulic drive system and a plurality of hydraulic pressures in a portion lower than the first terminal of the upward and inclined first detachable surface Arranging a plurality of first joints connected by a hose;
The work machine side joint housing has a second detachable surface attachable to the first detachable surface of the vehicle side joint housing, a first terminal of the electrical connector, a detachable second terminal, and the vehicle side joint; A plurality of second joints, which are detachable and connected with hydraulic equipment of the work machine and a plurality of hydraulic hoses, are arranged ,
An oil sump for storing oil leaked from the first joint or the second joint is disposed in the vehicle side joint housing,
At least one guide pin serving as a guide when the work machine side joint housing is mounted on the vehicle side joint housing is disposed on the second attachment / detachment surface of the work machine side joint housing. Forming at least one guide hole capable of receiving the guide pin on the first detachable surface;
Forming an oil receiving hole surrounding the first joint on the first detaching surface of the vehicle side joint housing, and communicating the oil receiving hole with the oil reservoir;
A joint attachment / detachment device for a work machine vehicle, wherein a part of a communication path communicating from the oil receiving hole to the oil reservoir is communicated with at least one guide hole of the vehicle side joint housing . The joint attachment / detachment device according to claim 1 , wherein a cover covering the first terminal of the electrical connector on the first attachment / detachment surface of the vehicle-side joint housing and the first joint is arranged to be openable and closable.

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