JPH0254442B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a hinge structure that rotatably connects two members, particularly a cartridge type hinge structure (a seal is integrally formed on the pin side). This invention relates to the structure of a cartridge pin portion (hereinafter referred to as a cartridge assembly) of a hinge structure that is removable.

(Prior Art) Generally, in a hinge structure in which two members are rotatably coupled, an oil reservoir is provided in the hinge portion to ensure smooth rotation. Therefore, a sealing material made of an elastic material is installed at the sliding portion of the hinge portion to prevent the oil from leaking. and,
In view of the fact that the above-mentioned sealing material is often damaged when the hinge pin is press-fitted into the hole in the hinge part using a press, etc., or the sealing effect can be pre-adjusted and tested in the factory and then installed on-site while preserving the sealing effect. Thus, a hinge structure (Japanese Patent Publication No. 47-47064) using a cartridge assembly as shown in FIG. 6 has been disclosed.

In the hinge structure using the above cartridge assembly, a central bush 3' is rotatably inserted into the center of the hinge pin 1', bushes 2' are inserted at both ends, and the hinge pin 1' and bushes 2' are connected. are fixed by welding to form cartridge assembly A′,
The cartridge assembly A' is connected to a coupling hole 6a' between a first member 6' and a second member 7' which are arranged concentrically.
7a' using a hydraulic press or the like, so as to be rotatable between the hinge pin 1' fixed to the first member and the central bush 3' fixed to the second member.

(Problem to be Solved by the Invention) However, when the cartridge assembly A' is press-fitted into the coupling holes 6a' and 7a' as described above, due to an error in the fitting dimensions, the hinge pin 1' The outer circumferential surface of the rotatably inserted central bushing 3' is pressed by the inner circumferential surface of the coupling hole 7a' of the second member 7', and the inner hole diameter of the central bushing 3' contracts.
The hinge pin 1' and the central bush 3' are sandwiched together,
Their rotation, that is, the smooth rotation of the first member 6' and the second member 7' may be hindered. Further, for the above-mentioned reasons, stricter tolerances for the fitting dimensions require advanced manufacturing technology in the production process, which leads to an extremely high manufacturing cost.

This invention was made in view of the above-mentioned current situation.
An object of the present invention is to provide a cartridge assembly in which smooth rotation is always guaranteed without strict tolerances in fitting dimensions in a cartridge type hinge structure.

(Means for Solving the Problems) A cartridge assembly according to the present invention is used for a cartridge type hinge structure that rotatably connects a first member and a second member, and the first member is attached to the outer peripheral surface of the cartridge assembly. A cup-shaped fixing sleeve that has a joint surface with the fixed sleeve and has an opening on one side and a through hole in the center of the other side is installed in the through hole portion so that the opening side is facing the other side and the lubricating oil does not leak from the fixed part. The cylindrical float pin is fixed to both ends of the cylindrical connecting pipe, and both ends of the outer circumferential surface of the cylindrical float pin are fixed to the inner wall of the fixed sleeve in the space formed by the inner wall of the fixed sleeve and the outer circumferential surface of the connecting pipe. The float pin is rotatably held on the peripheral surface and is inserted onto the connecting pipe so that there is a space between the inner peripheral surface of the float pin and the outer peripheral surface of the connecting pipe, and the outer peripheral surface is connected to the second member. A rotary sleeve having a joint surface is placed on the float pin such that both end surfaces thereof rotatably abut against the end surfaces of the cup-shaped protrusion of the fixed sleeve, and the inner circumferential surface rotatably abuts the outer circumferential surface of the float pin. A liquid-tight means is provided on the abutting surfaces of the rotary sleeve and the stationary sleeve.

(Function) Therefore, the cartridge assembly having the above-mentioned structure functions as follows in the hinge structure. That is, the outer circumferential surface of the stationary sleeve is crimped into a corresponding coupling hole formed in the first member, and the outer circumferential surface of the rotating sleeve is crimped into a corresponding coupling hole formed in the second member. be done.
In the above crimping, the outer circumferential surface of the rotating sleeve is pressed by the inner circumferential surface of the coupling hole of the second member, and the inner circumferential surface of the rotating sleeve contracts radially inward, pressing the outer circumferential surface of the float pin inward. However, even if the rotating sleeve and the float pin are pinched together, the float pin contacts the stationary sleeve on the outer circumferential surface and side surface, and there is an annular space between the connecting pipe and the float pin, so that the floating pin can be rotatably connected. It will not be pinched by the fixing sleeve and connecting pipe on the first member side.

Therefore, even if there is some margin in the radial dimension of the shaft due to a fitting error, smooth rotation of the first member and the second member can always be maintained.

(Example) Hereinafter, the present invention will be described in more detail using examples with reference to the drawings.

FIG. 1 is a partially sectional side view showing the structure of a cartridge assembly, which is the essential part of the invention, and FIG. 2 is a side sectional view showing the overall structure of the hinge structure.

The configuration of the cartridge assembly will be explained based on FIG. 1. In the figure, A denotes a cartridge assembly, and the cartridge assembly A is composed of a connecting pipe 1, a fixed sleeve 2, a float pin 3, a rotating sleeve 4, and an oil seal 5. The connecting pipe 1 has a cylindrical outer shape, and an insertion hole 2 having an outer diameter equal to the outer diameter of the connecting pipe is provided at both ends of the connecting pipe in the center of one side wall.
A cup-shaped fixing sleeve 2 is formed with a cylindrical outer peripheral wall extending from the outer periphery of the one side wall and opened to the other side, and the cup-shaped opening (projecting) sides are opposite to each other. The insertion surface on the outer end side is welded to prevent leakage of lubricating oil from the insertion location. The outer peripheral surface of the fixed sleeve 2 is the segment 11a of the collect assembly.
It has a tapered shape corresponding to the tapered shape formed on the inner wall (see FIG. 2). Furthermore, a cylindrical float pin 3 is mounted on the outer circumferential surface 3a of the space formed by the cup-shaped inner walls of the two opposing fixing sleeves 2 and the outer circumferential surface of the connecting pipe.
is rotatably held by the cup-shaped inner circumferential surface at both ends thereof, and an annular space D is formed between the outer circumferential surface 1a of the connecting pipe and the inner circumferential surface 3 of the float pin. and is inserted onto the connecting pipe 1. Further, within the space formed by the cup-shaped protruding end surfaces 2c of the two opposed fixed sleeves 2 and the outer circumferential surface 3a of the float pin, the outer circumferential surface 4a is tapered and the inner circumferential surface 4b has an oil reservoir. The rotary sleeve 4 has a recess 4b' formed therein, and its inner peripheral surface 4b rotatably contacts the outer peripheral surface 3a of the float pin, and the shaft end surface 4c of the rotary sleeve 4 contacts the cup-shaped portion of the fixed sleeve 2. It is inserted and attached so as to be in rotatable contact with the protrusion end face 2c of. An annular space E for mounting an oil seal 5 is formed at the abutting portion between the stationary sleeve 2 and the rotary sleeve 4.
In addition, at the tapered outer circumferential proximal end side (the side where the outer diameter is increased) 4c' of the rotary sleeve 4, the fixed sleeve's proximal end (the side end where the outer diameter is increased) 2
It is configured to protrude in the radial direction from c' to form a step.

Next, the configuration of the hinge structure in which the cartridge assembly is used will be explained based on FIG. 2.

This hinge structure has coupling holes 6a and 7a formed in a first member 6 and a second member 7 that are rotatably coupled.
, the above-mentioned cartridge assembly A that connects the two members, a collect assembly B that sandwiches the cartridge assembly A and the first member 6, and the second member 7 and the cartridge assembly It consists of a loosening prevention means C that clamps the assembly A and prevents it from loosening. The first member 6 has a bifurcated outer end portion (shown as two separated members in FIG. 2), and a coupling hole 6a is formed concentrically at the bifurcated tip portion. A cylindrical bush 8 is press-fitted into the inner hole of the coupling hole 6a. On the other hand, the second member 7 has a shape such that its distal end is attached between the two legs of the first member, and the distal end has a coupling hole 7a.
is formed. In the inner hole portion of the coupling hole 7a, there is a bush 9 having a tapered inner hole corresponding to the tapered shape formed in the outer shape of the rotary sleeve 4 of the cartridge assembly A.
The base end (meaning the end with the larger inner diameter) is press-fitted so as to protrude from the end surface of the second member.
The inner hole of the base end 9a of the bush 9 has a female thread 9b.
is formed.

In addition, the collet assembly B includes a detachable fitting 10 having a disc-shaped outer shape, a collet 11 consisting of a plurality of segments 11a that are engaged with the detachable fitting 10 and inserted and removed back and forth, and a plurality of segments 11a that can be attached and detached. An annular spring 12 held around the metal fitting 10
, a bolt/nut 13 for fastening the collet assembly B on both sides, and a removal bolt 14 used for removal. A circular hole 10a larger than the outer diameter of the bolt/nut 13 is formed in the center of the detachable fitting 10, and a female thread corresponding to the male thread of the bolt 14 is screwed into the circular hole. There is.

Further, as shown in FIG. 3, the means C for preventing the second member 7 and the cartridge assembly A from coming loose is a female thread 9b (see FIG. 2) formed in the bush 9 (see FIG. 2). ), a ring-shaped stopper 15 with a male thread 15a corresponding to this female thread formed on the outer periphery and a slot 15b formed on the outer end surface, and two thick ring-shaped ones in the diametrical direction. It consists of split stoppers 16A and 16B and a bolt 17 that clamps the two stoppers. still,
The inner hole diameter of the ring-shaped stopper is
(see figure), and a female threaded hole 16b corresponding to the bolt 17 is formed in one of the stoppers 16B. moreover,
A pin 19 is implanted at the outer end of the inner hole of the stopper.

Therefore, the cartridge assembly having the above-mentioned structure has the following effect in the hinge structure having the above-described structure.

First, the first member 6 and the second member 7 are arranged so that the respective coupling holes 6a and 7a are concentric, and the cartridge assembly A is inserted into the second member from the direction of the arrow F.
Insert the member into the inner hole of the bush 9 so that both tapered surfaces are in contact with each other. When the above-mentioned insertion is completed, the external thread of the stopper 15 is screwed into the internal thread 9b formed at the base end of the bush 9, and the fifth
Tighten using a tightening tool F as shown in the figure. As a result of the above-mentioned screwing, the bush 9 and the rotary sleeve 4 are sandwiched and fixed together by a wedge effect.

Next, stoppers 16A and 16B are attached to the outer periphery of the bush 9 protruding from the second member 7, and a pin 19 (see FIG. 2) implanted in the stoppers is attached to a stopper formed on the outer end surface of the stopper 15. 15b, the bolts 17 (see FIG. 3) are tightened to clamp them. In this state, there is an annular space between the bush 8 press-fitted into the first member 6 and the fixing sleeve 2 of the cartridge assembly A.

Next, the detachable fitting 1 is inserted into the annular space at both ends formed between the bush 8 and the fixed sleeve 2.
A collet 11 set with an annular spring 12 is inserted around the 0. In this state, the central circular hole of the detachable fittings 10 inserted at both ends and the inner hole of the connecting pipe 1 become approximately concentric, forming a through hole. Insert the bolt 13A into this through hole, screw the nut 13B onto the tip, and then tighten the nut 13A.
Tighten B and pull the detachable fittings 10 at both ends toward the center. That is, the collet 11 is press-fitted into the space between the bush 8 press-fitted into the first member 6 and the fixing sleeve 2 of the cartridge assembly A, and the first member 6 and the cartridge assembly A are wedged together. fixing sleeve 2 is fixed together.

When sandwiching the bush 9 on the second member side and the rotary sleeve 4 of the cartridge assembly A, even if there is some dimensional error in the inner diameter of the bush 9 or the outer diameter of the rotary sleeve 4, the joint may be Since it is formed in a tapered shape, by adjusting the degree of tightening of the stopper 15, it is possible to prevent backlash and prevent the rotary sleeve 4 from deforming inward. As a result, the rotating sleeve 4 and the float pin 3 can always rotate (slide) smoothly. Further, even if the degree of tightening of the stopper 15 becomes strong for some reason, the inner diameter of the rotating sleeve 4 contracts, and the rotating sleeve 4 and the float pin 3 are pinched together, the outer circumference of the float pin 3 and is rotatably held on the inner periphery of the fixed sleeve 2, and a space D is provided between the fork connecting pipe and the float pin, so that the space D between the float pin 3 and the fixed sleeve 2 and the float pin It becomes possible to smoothly rotate (slide) between the connecting pipe 3 and the connecting pipe 1. In addition, since the fixed sleeve and the first member are crimped by a wedge action with a tapered joint surface, there is some variation in the inner diameter of the bush 8, the outer diameter of the fixed sleeve 2, or the outer and inner diameters of the collet 11. Even if there is a dimensional error, by adjusting the degree of tightening of the bolts 13A, 13B, no looseness will occur and a predetermined degree of tightening can always be obtained. Furthermore, since a space D is provided in the rotating sleeve 4 and a space is provided between the connecting pipe and the float pin, the amount of lubricating oil increases, preventing deterioration of the lubricating oil, and ensuring smooth operation at all times. You can get rotation. Furthermore, since the connecting pipe 1 and the fixed sleeve 2 are welded together, and the oil seal 5 is provided on the sliding surface between the rotating sleeve 4 and the fixed sleeve 2,
No lubricating oil leaks outside the cartridge assembly. In addition, when removing the cartridge assembly A from the hinge structure, unscrew the bolts and nuts 13 of the collect assembly C, and insert the bolts 14 into the circular holes in the detachable fittings 10 at both ends.
By screwing in the bolt 14, the detachable fitting 10 is pulled outward, and the collet 11 engaged with the detachable fitting 10 is fixed between the bush 8 and the cartridge assembly A. The cartridge assembly can be easily removed from the hinge structure by pulling out from the space between the sleeve 2 and the above-mentioned procedure in reverse. moreover,
Even if "backlash" occurs in the rotating part, simply divide the stopper into two without disassembling the hinge structure, and replace the fifth
If a tool like the one shown in the figure is used, the fitting state can be easily adjusted and the "backlash" can be eliminated by retightening the stopper 15 in this state.

(Effects of the Invention) As explained above, by using the cartridge assembly of the present invention, it is possible to increase the allowable dimensional error of the inner diameter or outer diameter of the bush, pin, etc., thereby reducing manufacturing costs. Moreover, since there is no pinching at the sliding surface (rotating surface) as in the conventional case due to manufacturing errors, smooth rotation can always be obtained. In addition, as in the embodiment, if all the joining surfaces of the member and the cartridge assembly are formed into a tapered shape and a corresponding tapered joining hole is provided on the member side, the hinge part can be hydraulically pressed by the wedge action. To enable easy attachment and detachment in a short time even at a site where there is no such thing.
Furthermore, since the cartridge assembly includes a rotating sliding part, the oil seal and the like will not be damaged during the above-mentioned attachment and detachment.

[Brief explanation of the drawing]

FIG. 1 is a side view with a partial cross section showing the structure of a cartridge assembly which is the main part of the invention, FIG. 2 is a side sectional view showing the overall structure of the hinge structure, and FIG. X-ray arrow view, Figure 4 is Figure 2 Y
5 is a side view showing the external shape of the tightening tool, and FIG. 6 is a side sectional view showing a conventional cartridge pin type hinge structure. A... Cartridge assembly, 1... Connecting pipe, 2... Fixed sleeve, 3...
Float pin, 4... Rotating sleeve, 5... Oil seal.

Claims (1)

[Scope of Claims] 1. Used in a cartridge type hinge structure that rotatably connects a first member and a second member, which has a joint surface with the first member on the outer peripheral surface and is open on one side. A cup-shaped fixing sleeve having a through hole in the center of the other side is fixed to both ends of the cylindrical connecting pipe at the through hole portion so that the opening side thereof is facing the other side and lubricating oil does not leak from the fixed portion. In a space formed by the inner wall of the fixed sleeve and the outer circumferential surface of the connecting pipe, both ends of the outer circumferential surface of a cylindrical float pin are rotatably held on the inner circumferential surface of the fixed sleeve, and the float A rotary sleeve is inserted onto the connecting pipe so that there is a space between the inner circumferential surface of the pin and the outer circumferential surface of the connecting pipe, and the rotary sleeve has a joint surface with the second member on the outer circumferential surface. It is inserted onto the float pin so that it rotatably abuts the end surface of the cup-shaped protrusion of the fixed sleeve, and its inner circumferential surface rotatably abuts the outer circumferential surface of the float pin, and the rotary sleeve and the fixed sleeve A cartridge assembly characterized in that a liquid-tight means is provided on the contact surface. 2. The cartridge assembly according to claim 1, wherein the joint surface of the fixed sleeve with the first member is formed in a cylindrical shape or a tapered shape. 3. The cartridge assembly according to claim 1, wherein the joint surface of the rotating sleeve with the second member is formed in a cylindrical shape or a tapered shape.