JP2537722Y2 - Hydraulic piping mounting device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for mounting a hydraulic pipe.

[0002]

2. Description of the Related Art For example, when a power steering device for a vehicle is constructed, an oil feed pipe communicating with a hydraulic pump, a power cylinder for steering a front wheel, and the like is connected to a controller of a hydraulic path provided on a base end side of a handle shaft. In this case, conventionally, it has been general to connect the oil feed pipe to the controller by directly screwing a connection plug provided at the tip of the oil feed pipe into the housing of the controller.

[0003]

However, when the screw holes of the housing of the controller are close to each other, the range of engagement of the tool with the connection plug to be connected later is limited, so that the connection work is not possible. Often accompanied by difficulties. In addition, when screwing a connection plug for piping, a power tool such as an impact wrench cannot be used. Therefore, each connection plug must be attached one by one with a spanner, and this connection work itself is extremely difficult. Work efficiency was poor.

The present invention has been made in view of the above-mentioned circumstances, and has as its object to speed up and simplify the connection work when connecting an oil feed pipe to a portion where piping is concentrated, such as a controller of a power steering device.

[0005]

In order to achieve the above object,
The technical measures taken by the present invention are:
However, a mounting body 13 provided on one side with a housing portion 17 formed by expanding the oil passage 16 from the middle, and an oil feed pipe 6 having a mounting head 23 fitted and housed in the housing portion 17 fixed to the tip end. And a mounting plate 14 that is crimped to one surface of the mounting body 13. The mounting plate 14 has an insertion hole 25 through which the mounting head 23 can be inserted, and a housing 17 from the periphery of the insertion hole 25. The branch hole 26 is formed at a position corresponding to the mounting hole 14 so that the mounting head 23 is pressed against the mounting body 13 at the peripheral portion of the branch hole 26 when the mounting plate 14 is crimped. head
The point is that the diameter is smaller than 23.

[0006]

[Function] The mounting plate 14 is attached to the mounting plate by bolts 22 or the like.
13 is provided with a corresponding oil feed pipe 6 in each branch hole 26 when crimped to the side, and after crimping, all the oil feed pipes are
6 is pressed against the mounting body 13 side. Therefore,
Even when the connection positions of the oil feed pipes 6 are very close, the oil feed pipes 6 can be connected through the mounting of the mounting plate 14.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings. In FIG. 10, reference numeral 1 denotes a fully hydraulic power steering device employed in an agricultural tractor.
Is an oil tank 2 and a hydraulic pump 3 as a power source
And a front wheel steering mechanism 5 having a power cylinder 4 therein, and a controller 7 in which an oil supply pipe 6 connected thereto is concentrated. By controlling the controller 7 according to the rotation angle of the steering handle 8, , A closed circuit 9 formed between the controller 7 and the power cylinder 4
The piston 37 in the cylinder tube 36 is displaced left and right, and the front wheel 10 can be steered.

Reference numeral 11 denotes a hydraulic pipe mounting apparatus according to this embodiment. As shown in FIGS. 1 to 6, the mounting device 11 includes a mounting body 13 mounted on the housing 12 of the controller 7.
And a mounting plate 14 for connecting each oil feed pipe 6 to the mounting body 13. The mounting body 13 is made of a thick steel material having a substantially square shape in plan view, and has an oil passage 16 communicating with each oil passage 15 of the housing 12 penetrating in the thickness direction. On the front side of the mounting body 13, that is, on the side of the joint surface with the mounting plate 14, there is provided a columnar accommodation portion 17 formed by expanding the oil passage 16 from the middle. On the side, that is, on the side of the joint surface with the housing 12, a small seal groove 18 surrounding the opening edge of each oil passage 16 and a large seal groove 19 surrounding the entire oil passage 16 are formed. I have.

Reference numeral 20 denotes a screw hole for a flow control valve for preventing an overload on the controller 7. Reference numeral 21 denotes a bolt hole of the flanged bolt 22, which is provided at four corners of the mounting body 13 in the thickness direction. In addition, each of the storage sections 17 includes:
As shown in FIG. 2, the shaft center is arranged so as to be slightly shifted in the radial direction from the center of the mounting body 13 with respect to the shaft center of the corresponding oil passage 16.

Reference numeral 23 denotes a mounting head fixed to the tip of each oil feed pipe 16 and has a cylindrical shape substantially the same size as the accommodation portion 17.
An O-ring 24 is provided on the peripheral side surface. The mounting plate 14 is a steel plate having a substantially same square shape as the mounting body 13 in a plan view, and has an insertion hole 25 having a diameter larger than the mounting head 23 at the center. Four branch holes 26 are provided radially in plan view corresponding to the number of paths 16.

Each branch hole 26 extends from the periphery of the insertion hole 25 to the mounting body 13.
The inner diameter d ₀ of each branch hole 26 is equal to the outer diameter d of the mounting head 23.
_It is set to be smaller than ₁ and slightly larger than the outer diameter d ₂ of the oil supply pipe 6. In the vicinity of the tip of each branch hole 26 of the mounting plate 14, a sign 27 indicating the type of the oil feed pipe 6 to be connected is engraved. OUT is the oil feed pipe 6 of the oil tank 2, and IN is the hydraulic pump. 3, oil pipe
6, RT is the oil pipe 6 on the right steering side of the power cylinder 4, L
T indicates that the oil pipe 6 on the left steering side should be connected.

In order to connect the oil feed pipe 6 to the controller 7 using the mounting device 11 having the above structure, as shown in FIGS. 1 and 6, first, the mounting body 13 is connected to the housing 7 on the controller 7 side by a bolt 22 with a collar. After being fixed to the 12 side, each oil feed pipe 6 is inserted one by one into the insertion hole 25 of the mounting plate 14 and then slid into the corresponding branch hole 26. With the four oil feed pipes 6 thus housed in the corresponding branch holes 26, the mounting head 23 of each oil feed pipe 6 is fitted and housed in the housing portion 17 of the mounting body 13 while the mounting plate is fitted. 14 to mounting body 13
After that, the mounting plate 14 is attached to the mounting body via a lock nut 28 which is screwed to the tip of the flanged bolt 22.
Crimp to the 13 side.

At this time, since each branch hole 26 has a smaller diameter than the mounting head 23, the mounting head 23 is
Is pressed toward the mounting body 13 from behind by the peripheral edge of the branch hole 26 through the fastening force, whereby the four oil feed pipes 6 are connected to the mounting body 13 at once through the crimping of the mounting plate 14. Will be. That is, according to this embodiment, the mounting plate
Since the oil supply pipe 6 is connected by bolting 14, the tool can be smoothly disengaged even when the connection position of the oil supply pipe 6 is close, and the connection work can be more simplified than before. In addition, since a power tool such as an impact wrench can be used at the time of bolt fastening, the connection work can be sped up.

The mounting device 11 can be applied not only to the controller 7 of the power steering device 1, but also to any other portion where hydraulic piping is concentrated. Further, the mounting body 13 may be formed integrally with the housing 12. As shown in FIG. 7, the front wheel steering mechanism 5 has a front axle 32 attached to a tractor body 31 via a center pin 30 so as to be able to swing left and right, and is fixed laterally via a bracket 33 on the front side of the front axle 32. Power cylinder 4 and
A knuckle arm 34 that supports the front wheel 10 and is rotatably supported at both ends of a front axle 32 around a kingpin;
A tie rod 35 is provided for linking the power cylinder 34 with the power cylinder 4.

The power cylinder 4 includes a cylinder tube 36
And a piston 37 fitted in the piston 37, and a piston rod 38 extending to both left and right sides from the piston 37, and the tip of the piston rod 38 is connected to the tie rod 35 via a ball joint 39. Have been. Cylinder tube
On both sides of 36, a plug 40 is fitted in an oil-tight manner, and a piston rod 38 penetrates the center of the plug 40,
In the present embodiment, the plug 40 is fastened directly to the front surface of the bracket 33 with a bolt 41 to thereby provide the power cylinder.
4 is attached to the front axle 32.

Two of the oil supply pipes 6 for the power cylinder 4 are piped to the front of the tractor body 31, and are connected via plugs 42 and hydraulic hoses 43 to left and right plugs 40.
Connected to each other. As shown in FIGS. 8 and 9, the distal end of the hydraulic hose 43 is fitted on the peripheral surface of a cylindrical mounting head 44 having an oil passage therein, and the radial surface of the mounting head 44 has a sealing material. 45 are provided. On the other hand, the mounting seat surface of the plug 40 is provided with a storage hole 46 in which the mounting head 44 just fits, and this storage hole 46 is communicated with the inside of the cylinder tube 36 via an oil passage 47. I have.

Therefore, in this embodiment, when the plug 40 is fastened to the bracket 33 with the bolt 41, the mounting head 44 is housed in the storage hole 46 of the plug 40, so that the power cylinder 4
The pipe connection work can be performed at the same time as the mounting of the hydraulic cylinder 43, and no special screw tightening work or the like is required for connecting the hydraulic hose 43 to the cylinder tube 36. Further, since the mounting head 44 is placed between the plug 40 and the bracket 33 after the mounting, there is an advantage that the connection portion can be protected.

As shown in FIGS. 11 to 13, the bracket 33 is formed so as to protrude greatly in front of the front axle 32,
The cylinder tube is inserted into the through hole 48 provided in the bracket 33.
36, and the plug 40 is fastened with a retaining ring 49 provided on the inner periphery of the bracket 33, thereby connecting the power cylinder 4 to the front axle.
Can be mounted on 32. In this case, FIG.
Here, the hydraulic hose 43 is connected by a connection plug 50 extending from the outer periphery of the bracket 33 to the inside of the plug 40. FIG.
In 2, a cylindrical adapter is inserted between the plug 40 and the cylinder tube 36.
The hydraulic hose 43 is connected to the tubular adapter 51. In FIG. 13, a ring-shaped adapter 52 is interposed between the plug 40 and the retaining ring 49, and a hydraulic hose 43 is connected to the ring-shaped adapter 52.

In any of these cases, the hydraulic hose 43 is not connected to the cylinder tube 36 itself.
Since it is not necessary to weld the mounting seat of the connection plug to the cylinder tube 36, it is possible to avoid such a disadvantage that the curvature of the inner surface of the cylinder tube 36 is distorted due to welding distortion or the like. In FIGS. 12 and 13, the hydraulic hose 43 is connected via the adapters 51 and 52.
There is an advantage that the connection angle can be freely set.

[0020]

[Effects of the Invention] According to the present invention, even if the connection positions of the oil supply pipes 6 are close to each other, the oil supply pipes 6 can be connected to the attachment body 13 through the attachment of the attachment plate 14 to the attachment body 13 without any problem. Therefore, the connection work of the hydraulic piping can be performed quickly and simply.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a hydraulic pipe mounting device.

FIG. 2 is a plan view of a surface of a mounting body.

FIG. 3 is a side view of the same.

FIG. 4 is a plan view of a mounting plate.

FIG. 5 is a rear plan view of the mounting body.

FIG. 6 is a cross-sectional view taken along the line AA of FIG. 2 showing an attached state of the oil feed pipe.

FIG. 7 is a plan view of a front wheel steering mechanism.

FIG. 8 is a perspective view of a pipe portion of the power cylinder.

FIG. 9 is a sectional view of the same.

FIG. 10 is an overall configuration diagram of a power steering device.

FIG. 11 is a sectional view of a pipe portion of the power cylinder.

FIG. 12 is a sectional view of the same.

FIG. 13 is a sectional view of the same.

[Explanation of symbols]

 6 Oil pipe 13 Mounting body 14 Mounting plate 16 Oil passage 17 Housing 23 Mounting head 25 Insertion hole 26 Branch hole

Claims (1)

(57) [Scope of request for utility model registration] A mounting body (13) provided on one side with a housing part (17) formed by expanding an oil passage (16) from a middle part, and said housing part (1).
An oil feed pipe (6) having a mounting head (23) fitted and housed in the fitting body (7) fixed to the tip thereof, and a mounting plate (14) crimped on one surface of the mounting body (13). (14) has an insertion hole (25) through which the mounting head (23) can be inserted, and the insertion hole (2
A branch hole (26) extending from the periphery of 5) to a position corresponding to the accommodation portion (17) is formed, and the branch hole (26) is formed in the mounting plate (1).
At the time of crimping of 4), the mounting head (2) is pressed so that the mounting head (23) is pressed toward the mounting body (13) at the periphery of the branch hole (26).
A hydraulic pipe mounting device characterized in that it has a smaller diameter than 3).