JP2512681Y2 - Plate member fixing structure - Google Patents

Description

The present invention relates to a plate member fixing structure for fixing a plate member having an orifice to a case having an oil passage.

[Prior Art] A conventional fixing structure for a plate member is, for example, a fourth structure.
There is something like the one shown in the figure.

In FIG. 4, reference numeral 1 denotes a case, the case 1 has an opening 2, and the case 1 has an oil passage 3 formed therein. A plate member 4 is inserted into the opening 2 of the case 1, and an orifice 5 is formed in the plate member 4. The plate member 4 is inserted into the opening 2 of the case 1, and the oil passage 3 and the orifice 5 are aligned with each other. 6
Is a bolt, and the plate member 4 is fixed to the case 1 by the bolt 6.

In order to fix the plate member 4 to the case 1 with the bolt 6, the roll pin 8 is driven into the case 1 from the plate portion 7 of the plate member 4 to align the oil passage 3 and the orifice 5 and tighten with the bolt 6. At this time, the plate member 4 is prevented from rotating.

The case 1 and the plate member 4 constitute a part of the hydraulic differential limiting device, and the generated torque is
It depends on the pressure loss as the oil passes through the orifice 5.

That is, as the torque characteristic, as shown in A of FIG. 5, the torque ΔT of the quadratic curve corresponding to the rotational speed difference ΔN is obtained. The torque ΔT is expressed by the following equation, and the pressure loss Δ
It depends on P and becomes a quadratic function of the flow rate ΔQ.

ΔT = α · ΔP = α (β · ΔQ ² ) [Problems to be solved by the invention] However, in such a conventional plate member fixing structure, all the oil passes through the orifice. Therefore, since the torque characteristic becomes a quadratic curve, when the vehicle characteristic is not preferable, there is a problem that, for example, a sudden power oversteer during turning occurs.

The present invention has been made in view of such conventional problems, and prevents the sudden abnormal behavior of the vehicle by making the torque characteristic linear by leaking oil. An object of the present invention is to provide a fixing structure for the plate member.

[Means for Solving the Problem] In order to achieve the above object, the present invention inserts a plate member having an orifice into an opening of a case having an oil passage to align the orifice and the oil passage. In the fixing structure of the plate member that is fixed with bolts after the operation, the plate member is made of an elastic member and the thickness is adjusted to a predetermined value.

[Operation] In the present invention, the plate member is made of an elastic member, and the thickness thereof is adjusted to a predetermined value. Therefore, all the oil from the oil passage of the case does not pass through the orifice but leaks from between the case and the plate member due to the bending of the plate member.

Therefore, the torque characteristic becomes linear from the quadratic curve.

As a result, it is possible to prevent abnormal vehicle behavior such as sudden power oversteer during turning.

The inclination of the linear torque characteristic can be adjusted by changing the thickness of the plate member.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

 1 to 3 are views showing an embodiment of the present invention.

First, the structure will be described. In FIG. 1, reference numeral 11 is a case, and an opening 12 protruding outward and a bolt hole 14 into which a bolt 13 is inserted are formed in the case 11.
An oil passage 15 is formed at 11. The case 11 constitutes a rotor of the hydraulic differential limiting device, the rotor is fixed to an axle shaft (not shown), and the plunger is slidably accommodated in the rotor. Therefore, when the plunger is driven by the cam housing, the oil in the plunger chamber is pumped to the oil passage 15.

Reference numeral 16 denotes a plate member inserted into the opening 12 of the case 11, and the plate member 16 has an orifice 17 communicating with the oil passage 15 of the case 11 and a ring groove 19 into which a seal ring 18 is inserted. Has been formed. A bolt hole 20 into which the bolt 13 is screwed is formed in the plate member 16, and a plate portion 21 is integrally formed.

The plate member 16 is made of an elastic member, for example, a rubber member, and the thickness t of the plate portion 21 is adjusted to have a predetermined value. Therefore, when the hydraulic pressure exceeds a predetermined value,
The plate portion 21 is curved so that the oil does not pass only through the orifice 17 but leaks from between the case 11 and the plate portion 21. Therefore, the torque characteristic becomes linear, and its inclination can be changed by adjusting the thickness t of the plate portion 21.

The plate member 16 is inserted into the opening 12 of the case 11 to align the oil passage 15 of the case 11 with the orifice 17 of the plate member 16. Then, the bolt 13 is inserted into the bolt hole 14 of the case 11 and the bolt hole 20 of the plate member 16 and tightened. As a result, the plate member 16 is fixed to the case 11 with the oil passage 15 and the orifice 17 positioned.

 Next, the operation will be described.

When a rotational speed difference ΔN occurs between the cam housing and the rotor, the plunger is pushed inside the rotor by the cam surface of the cam housing, and the oil in the plunger chamber is pumped to the oil passage 15. The oil pressure-fed to the oil passage 15 is
It passes through the orifice 17 of the plate member 16, and a pressure loss ΔP is generated during this passage.

Here, since the plate member 16 is composed of an elastic member and the thickness t of the plate portion 21 is adjusted to a predetermined value, all the oil does not pass through the orifice 17 as shown by O in FIG. Due to the bending of the plate portion 21, leakage occurs between the plate portion 21 and the case 11.

Therefore, the torque characteristic at this time becomes linear as shown from A to B or C in FIG. The inclination of the straight line B or C can be adjusted by changing the thickness t of the plate portion 21.

In this way, since the torque characteristic can be made linear, sudden abnormal behavior of the vehicle such as power oversteer can be prevented.

[Advantages of the Invention] As described above, according to the present invention, the plate member is made of an elastic member and the thickness thereof is adjusted to a predetermined value. Instead, it can be leaked and the torque characteristic can be made linear. As a result, it is possible to prevent abnormal vehicle behavior such as sudden power oversteer during turning.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention, FIG. 2 is an explanatory view for explaining the operation, FIG. 3 is a graph showing torque characteristics, FIG. 4 is a sectional view showing a conventional example, and FIG. Is a graph showing a conventional torque characteristic. In the drawing, 11 ... Case, 12 ... Opening part, 13 ... Bolt, 14, 20 ... Bolt hole, 15 ... Oil passage, 16 ... Plate member, 17 ... Orifice, 18
… Seal ring, 19… Ring groove, 21… Plate part.

Claims (1)

(57) [Scope of utility model registration request] 1. A plate member fixing structure in which a plate member having an orifice is inserted into an opening of a case having an oil passage to align the orifice and the oil passage, and then fixed by a bolt. A plate member fixing structure, characterized in that the plate member is made of an elastic member and the thickness thereof is adjusted to a predetermined value.