JPH08189558A - Lubricating structure of change device - Google Patents

Abstract

PURPOSE: To automatically replenish grease to the periphery of a spherical fulcrum member of a change lever. CONSTITUTION: A fulcrum member 15 to be added to a change lever 14 is constituted in a hollow shape by joining a pair of bowl-shaped semispherical bodies 27 and 28 together, and grease is filled inside of it. A grease hole 35 to ooze out this grease to an outer peripheral surface of the fulcrum member 15 is arranged in the semispherical bodies 27 and 28.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lubricating structure for a change device for controlling a transmission of an automobile, and more particularly to a housing of a lever bracket having a spherical fulcrum member fixed to a change lever for selecting and shifting the lever. The present invention relates to a lubrication structure around a fulcrum member in a change device that supports the swinging of the swing device.

[0002]

2. Description of the Related Art Conventionally, in order to lubricate the surroundings of the fulcrum member, grease is applied to the outer surface of the fulcrum member and the inner surface of a housing supporting the fulcrum member before the change device is assembled.

[0003]

However, in the above-mentioned lubrication method, it is necessary to disassemble the change device each time the grease is replenished, and it is difficult to say that the maintainability is good.

The present invention has been made in view of the above circumstances, and provides a lubrication structure of a change device which enables automatic replenishment of grease around a fulcrum member and can always maintain a good lubrication state. With the goal.

[0005]

In order to achieve the above object, the present invention provides a fulcrum member having a hollow shape, filled with grease therein, and exuding the grease to the outer peripheral surface of the fulcrum member. The first feature is that the grease hole is provided in the fulcrum member.

In addition to the above characteristics, the present invention has a second characteristic that a grease reservoir having a grease hole is formed on the outer peripheral surface of the fulcrum member.

[0007]

According to the first feature of the present invention, the grease in the fulcrum member can be exuded from the grease hole and automatically supplied to the rotary sliding surfaces of the fulcrum member and the housing.

According to the second aspect of the present invention, the grease that has exuded from the grease hole can be held in the grease reservoir on the outer periphery of the fulcrum member.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

First, in FIGS. 1 to 4, a lever bracket 1 mounted on a floor plate F of an automobile through a mount rubber 2 is made of synthetic resin, and a first and a second towers which share a partition wall and are arranged in the lateral direction of the vehicle. 3, 4 (see FIGS. 2 and 4)
It is equipped with. The first tower 3 has a substantially square cross section with an open lower surface, and the second tower 4 has a rectangular shape elongated in the front-rear direction of the vehicle with both upper and lower surfaces open.

As shown in FIGS. 3 and 4, the first tower 3
The housing 5 integrally extends from the upper end wall 3a of the tower 5 along the axis of the tower 3, and a plurality of radial reinforcing ribs 6 are provided between the opposing peripheral surfaces of the housing 5 and the first tower 3. Be connected.

The housing 5 comprises an upper large-diameter cylindrical portion 8 and a lower small-diameter cylindrical portion 9 arranged side by side with an intermediate step portion 7 interposed therebetween, and the small-diameter cylindrical portion 9 is provided with a hemispherical bottom wall 9a. Further, a single guide groove 10 (see FIGS. 2 and 4) extending in the vertical direction is formed on the inner surface of the small-diameter cylindrical portion 9.

A plurality of locking holes 11 are formed in the large-diameter cylindrical portion 8 so as to face the step portion 7. Further, elongated holes 12 and 13 extending in the vertical direction are formed in the side walls of the small-diameter cylindrical portion 9 and the second tower 4 which face each other.

A spherical fulcrum member 15 of the change lever 14 is rotatably engaged with the hemispherical bottom wall 9a of the small-diameter cylindrical portion 9 and is made of a synthetic resin which is rotatably engaged with the fulcrum member 15 from above. An annular cap 16 is fitted on the inner peripheral surface of the small diameter cylindrical portion 9. At that time, a detent ridge 17 (see FIGS. 2 and 5) provided on one side surface of the cap 16 is engaged with the guide groove 10. The fulcrum member 1 of this cap 16
The surface 16a that contacts the outer peripheral surface is formed as a spherical surface that fits the outer peripheral surface.

An annular recess 20 for holding an elastic ring 19 such as an O-ring is formed on the outer periphery of the upper end of the cap 16, and the elastic ring 19 has its upper half portion exposed from the upper surface of the cap 16 in its free state. It is like this. An annular retainer 21 (see FIG. 5) made of synthetic resin for compressing and holding the cap 16 by compressing the elastic ring 19 from above is provided on the inner peripheral surface of the large diameter cylindrical portion 8 to the small diameter cylindrical portion 9. A plurality of elastic locking claws 22 that are fitted and project on the outer periphery of the retainer 21 are engaged with the locking holes 11.

As shown in FIG. 3, the locking claw 22 has its tip inclined upward, and when the retainer 21 is fitted into the large-diameter cylindrical portion 8, the locking claw 22 is bent inward by its inner surface and locked. When it reaches the position of the hole 11, it engages with the locking hole 11 by its own elastic force.

On the other hand, the upper surface 11a of the locking hole 11 is also inclined upward in the radial direction. Therefore, when the locking claw 22 engaged with the locking hole 11 receives an upward repulsive force from the elastic ring 19, the engagement with the locking hole 11 can be further strengthened. Further, the retainer 21 is the housing 5
Has a stepped portion 21a facing the stepped portion 7 of each of the two stepped portions 7 and 21a when the retainer 21 is fitted into the housing 5.
The amount of compressive deformation of the elastic ring 19 due to the contact of the above is regulated.

Thus, the cap 16 rotatably clamps the fulcrum member 15 by the repulsive force of the elastic ring 19 in cooperation with the bottom wall 9a of the housing 5.

As shown in FIGS. 1 and 4, the change lever 14 includes a rod-shaped main lever 24 having a knob 24a at its upper end, and a rod-shaped main lever 24 welded to the lower end of the main lever 24 so as to intersect in a T-shape. And the sub-lever 25 of the. The sub-lever 25 extends from one side of the main lever 24, penetrates the elongated holes 12 and 13, and reaches the inside of the second tower 4, and a short rod portion slightly protrudes to the other side of the main lever 24. 25b, and the auxiliary lever 25 and the main lever 2
The fulcrum member 15 is fixed at the intersection of 4 so as to wrap it.

That is, as shown in FIGS. 4 to 6, the fulcrum member 15 includes a pair of bowl-shaped hemispheres 27, 28 made of synthetic resin.
Are joined together to form a hollow structure. Both hemispheres 27,2
Numeral 8 is basically symmetrical with respect to these mating surfaces, and semi-cylindrical support recesses 29, 30, 31 extending in three directions are formed on the respective end surfaces, and these are formed by the main lever 24, and The long lever 25a and the short rod 25b of the sub-lever 25 are fitted to the outer peripheral surfaces thereof. Then hemisphere 27,
The center of 28 is adapted to coincide with the intersection of the axes of the main lever 24 and the auxiliary lever 25.

A plurality of positioning protrusions 32 and positioning holes 3 are formed on one end surface and the other end surface of both hemispheres 27 and 28.
3 are respectively formed, and these hemispheres 27 and 28 are temporarily joined to each other by light press fitting of these.

Thus, the joined state of the two hemispheres 27 and 28 is reliably held by sandwiching them between the bottom wall 9a of the housing 5 and the cap 16 as described above.

Grease is filled in each hemisphere 27, 28 in advance, and a grease hole 35 for allowing this grease to seep to the outer periphery of the fulcrum member 15 is provided between the lower mating surfaces of both hemispheres 27, 28 and in other suitable places. Further, a plurality of annular grease reservoirs 36 in which most of the grease holes 35 are opened are formed on the outer circumferences of the hemispheres 27 and 28.

Further, on the outer peripheral surfaces of the end portions of the hemispheres 27, 28, an annular chamfered portion 34 formed at the time of molding is formed. Thus, as shown in FIG. 7, when the hemispheres 27 and 28 are molded by the halves of the dies 37 and 38, both dies 3
If the joining surfaces of 7, 38 are aligned with the end surfaces of the hemispheres 27, 28, the burrs protruding from the product capability 39 so as to enter between the joining surfaces of the two molds 37, 38 will be the hemispheres 2.
It is possible to prevent the outer peripheral spherical surface of 7, 28 from projecting outward, and therefore, the hemispheres 27, 28 with burrs are attached.
Even if it is assembled in the housing 5, it is possible to prevent the mating member from being damaged by burrs.

As shown in FIGS. 1, 2 and 4, a bell crank 41 made of synthetic resin is attached to the second tower 4 via a horizontal pivot 40. The bell crank 41 includes a horizontal arm 41a extending a swing end forward and a vertical arm 41b extending a swing end upward, and the auxiliary lever 2 is provided in a connecting hole 41 formed on an inner surface of the horizontal arm 41a.
A bush 43 attached so as to be swingable at the tip of 5 is slidably fitted. Further, one end of a push-pull type selection wire 44 is attached to the turnbuckle 4 on the vertical arm 41b.
8 is connected via a rod 46.

On the other hand, as shown in FIGS. 1 and 3, one end of a push-pull type shift wire 45 is connected to a connecting piece 50 connected to an intermediate portion of the main lever 24, and a rod 47 with a turnbuckle 49 is provided. Connected via.

The other ends of the select wire 44 and the shift wire 45 are connected to a select member and a shift member of a transmission (not shown), respectively.

Next, the operation of this embodiment will be described.

When the main lever 24 is swung in the select direction A (see FIG. 4, left and right direction of the vehicle) around the fulcrum member 15 by gripping the knob 24a, the sub-lever 25 swinging vertically moves the bell crank 41 horizontally. Since the vertical arm 41b is swung back and forth in the vehicle by driving the arm 41a, a select operation is given to the transmission through the select wire 44 and a desired gear train is selected. Next, when the main lever 24 is swung in the shift direction B (front-rear direction of the vehicle) around the fulcrum member 15, the transmission is shifted through the shift wire 45 and the gear train previously selected is established. To do.

By the way, the pair of hemispheres 27, 28 constituting the fulcrum member 15 are respectively provided with support recesses 29, 3 in three directions.
Since 30 and 31 are fitted and supported by the main lever 24 and the auxiliary lever 25 that intersect in a T-shape, the relative displacement of the change lever 14 and the fulcrum member 15 in the axial direction and the rotation direction can be easily and surely performed. Therefore, when the change lever 14 is operated, rotational sliding is smoothly caused between the contact surfaces of the fulcrum member 15 lubricated with grease and the housing 5 and the cap 16.

In particular, since the grease that exudes from the fulcrum member 15 through the grease hole 35 is replenished to the contact surface, a good lubrication state is always maintained. Moreover, since many grease holes 35 open in the annular grease reservoir 36, the grease that has exuded into the grease reservoir 36 is retained, and a good lubrication state can be maintained for a long period of time. In addition, the grease hole 35 provided on the mating surfaces of both hemispheres 27, 28 is
Since the chamfered portions 34 on the outer circumferences of the ends of both hemispheres 27 and 28 are opened, the chamfered portions 34 are also filled with the grease reservoir 36.
Can retain exuded grease as well as. Therefore, the chamfered portion also corresponds to the grease reservoir of the present invention.

Further, the bottom wall 9a of the housing 5 and the cap 16 cooperate to clamp the support member 15 with the repulsive force of the elastic ring 19, so that the wear generated between them is automatically compensated and the occurrence of backlash occurs. Can be prevented. Moreover, since the elastic ring 19 allows engagement between the locking claw 22 and the locking hole 11 and retains the engaged state without rattling when the retainer 21 is fitted into the housing 5, it is used for the retainer 21. This also contributes to the improvement of the assemblability and the simplification of the structure, because the fixing member is unnecessary.

Further, since the locking claw 22 of the retainer 21 is inclined upward at the tip, and the upper surface 11a of the locking hole 11 of the housing 5 is also inclined outward in the radial direction, the retainer 21 is When an upward load is applied from the side of the cap 16, the locking claw 22 further strengthens the engagement with the locking hole 11, and the retainer 21 can be reliably prevented from coming off the housing 5.

FIG. 8 shows another embodiment of the present invention.
In the change lever 14, a large number of dimples 51 are formed as grease reservoirs at the point where the auxiliary lever 25 intersects one side surface of the main lever 24 in a T-shape and the outer peripheral surface of each hemisphere 27, 28. The structure is the same as that of the previous embodiment except that the grease holes 52 that open to the bottom surface of the dimple 51 are provided in each of the hemispheres 27 and 28. The code is attached.

According to this embodiment, the lubrication around the fulcrum member 15 can be more favorably performed.

In each of the above embodiments, various design changes can be made without departing from the gist of the present invention. For example, each hemisphere 27, 28 may be made of a steel plate press or aluminum die cast.

[0037]

As described above, according to the first feature of the present invention, the fulcrum member is formed hollow, the grease is filled in the fulcrum member, and the grease is leached to the outer peripheral surface of the fulcrum member. Since the hole is provided in the fulcrum member, the grease in the fulcrum member can be exuded from the grease hole and automatically replenished to the rotary sliding surface between the fulcrum member and the housing, which can eliminate grease replenishment work. Becomes

Further, according to the second feature of the present invention, since the grease reservoir having the grease hole opened is formed on the outer peripheral surface of the fulcrum member, the grease leached from the grease hole is held in the grease reservoir to thereby support the fulcrum. A good lubrication state around the member can be maintained for a long period of time.

[Brief description of drawings]

FIG. 1 is a partially longitudinal side view of a change device according to a first embodiment of the present invention.

2 is a sectional view taken along line 2-2 of FIG.

3 is an enlarged vertical sectional view taken along line 3-3 of FIG.

FIG. 4 is an enlarged sectional view taken along line 4-4 of FIG.

FIG. 5 is an exploded perspective view of a main part of the change device.

FIG. 6 is a partially cutaway bottom view of a fulcrum member in the change device.

FIG. 7 is an explanatory view of a method for forming a hemisphere forming the fulcrum member.

FIG. 8 is a sectional view similar to FIG. 4, showing a second embodiment of the present invention.

[Explanation of symbols]

 1-Lever bracket 5-Housing 14-Change lever 15-Supporting member 34-Chamfered part as grease reservoir 35-Grease hole 36- ..Grease reservoir 51 ... Dimples as grease reservoir 52 ... Grease hole A ... Select direction B ... Shift direction

Claims (2)

[Claims] 1. A housing (5) of a lever bracket (1) is provided with a spherical fulcrum member (15) fixedly mounted on a change lever (14) to swing the lever in a select direction (A) and a shift direction (B). In the change device that supports the fulcrum member, the fulcrum member (15) is formed hollow, grease is filled in the fulcrum member (15), and grease holes (35, 52) for exuding the grease to the outer peripheral surface of the fulcrum member (15) ) Is provided on the fulcrum member (15), the lubrication structure of the change device. 2. The grease hole (35, 5) according to claim 1, wherein the outer peripheral surface of the fulcrum member (15) is a grease hole (35, 5).
Lubrication structure for a change device, characterized in that a grease reservoir (34, 36, 51) having an opening 2) is formed.