JPH09210049A - Joining structure for manual shift lever - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a joining structure for a manual shift lever which can prevent rattle occurrence completely. SOLUTION: This joining structure for manual shift lever, where a spherical joining part 35 is formed at the end of a shift lever retained so as to be capable of tilting at a middle part and the spherical joining part 35 is fitted and connected with a member to be operated 31, is provided with a roughly tubular hole part 42 for inserting the spherical joining part 35 formed in the member to be operated 31. In the roughly tubular hole part 42, both edges 46a are supported onto the inner surface of the roughly tubular hole part 42, and a flat spring part 46 is provided which is constituted so that a central part 46b may protrude toward the center line of the roughly tubular hole part 42. The spherical joining part 35 is elastically-pressurized and retained by the central part 46b of the flat spring part 46.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting structure for a shift lever of a vehicle manual transmission and a member for transmitting an operating force of the shift lever to a shift fork.

[0002]

2. Description of the Related Art An example of this type of connecting structure is shown in FIGS. The structure shown here is based on Japanese Utility Model Laid-Open No. 57-424.
No. 26 publication, the shift lever 1
Is connected to the shift lever housing 2, and the shift lever housing 2 is formed integrally with the shift and select lever shaft 3. The shift and select lever shaft 3 is the transmission case 4
Is axially supported so as to be slidable in the axial direction.

The transmission case 4 also includes
A rotary shaft (not shown) assembled with a plurality of gears constituting a transmission gear train is pivotally supported, and the shift and select lever shaft 3 is operated by operating the shift lever 1.
Is moved in the axial direction to connect or disconnect the gears. In such a manual transmission, since the shift lever 1 is connected to the power system and the power transmission system via the shift lever housing 2, the shift and select lever shaft 3, etc., vibrations from the drive system and the drive transmission system occur. It is generally configured to prevent transmission to the shift lever 1.

This will be briefly described with reference to FIG. 6. In the connecting structure of the shift lever 1 and the shift lever housing 2, a small ball portion 5 is formed at the tip of the shift lever 1 and the shift lever 1 is formed. The housing 2 is formed with a fitting hole 6 that is connected to the small ball portion 5. A resin bush 7 is attached to the small ball portion 5, and an anti-vibration bush 8 is press-fitted to the inner periphery of the fitting hole 6.

Therefore, when the shift lever 1 and the shift lever housing 2 are connected, the outer peripheral surface of the small ball portion 5, the inner peripheral surface of the resin bush 7 and the outer peripheral surface of the resin bush 7 and the vibration-proof bush 8 are connected. It is in slidable contact with the inner peripheral surface, and vibrations are absorbed by these soft resins 7 and 8.

In the above structure, when the shift lever 1 is operated, the small ball portion 5 moves in the front / rear and left / right directions and slightly moves up and down. Since the vertical movement of the shift lever housing 2 is restricted, the outer peripheral surface of the resin bush 7 and the inner peripheral surface of the anti-vibration bush 8 slide. However, the resin bush 7 and the anti-vibration bush 8 are
As a result, the bushes 7 and 8 are deformed, and good sliding is not obtained, and the bushes 7 and 8 are rapidly worn. If a gap (backlash) occurs between these bushes 7 and 8 due to wear, the vibration absorption characteristics of the bushes 7 and 8 will deteriorate.

That is, in the connecting structure of the shift lever 1 and the shift lever housing 2 described above, since the volume elasticity of these soft resins 7 and 8 is used to absorb the vibration, the soft resin 7 and 8 are directly coupled. It was very difficult to control the deformation of No. 8 and the progress of wear on the bushes 7 and 8 could not be suppressed.

Therefore, a shift lever connecting structure having a structure for preventing deterioration of vibration absorption characteristics with time is disclosed in Japanese Patent Application No. 6-2179.
No. 25 application has been proposed. The configuration will be described with reference to the drawings. As shown in FIG. 7, a fitting hole 18 is formed in the shift lever housing 17, and the small ball portion 16 of the shift lever 15 is inserted into the fitting hole 18. The fitting hole 18 has a length of one side of the small ball portion 1
The fitting hole 1 is formed in a substantially square shape larger than the diameter of 6.
Four protrusions 17a for fixing a leaf spring 9 which will be described later are provided on the peripheral edge of the plate 8.

The leaf spring 9 arranged in the fitting hole 18 is
It is integrally molded by a press machine, and FIG. 8A shows a shape immediately after punching a steel spring plate material by a press machine. This will be briefly described. The substantially square steel spring plate member is punched out at the diagonal line portion except for the vicinity of the apex, and four substantially triangular portions shown by reference numeral 9a are formed. FIG. 8B shows the substantially triangular portions 9a, 9a, 9a of the steel spring plate material punched out as described above.
9a shows a bent state.

The leaf spring 9 is formed so as to have a mouth width smaller than the diameter of the small ball portion 16 of the shift lever 15 in a free state (shown by a chain line in FIG. 7). In FIG. 8C, the leaf spring 9 is used for the shift lever housing 17
The leaf spring 9 is fixed to the shift lever housing 17 by caulking inward as shown in the figure. On the other hand, as shown in FIG. 7, in the state where the small ball portion 16 of the shift lever 15 is inserted into the fitting hole 18 of the shift lever housing 17, the substantially triangular spring portions 9 of the leaf spring 9 are provided.
A predetermined gap δ is formed between a and the inner surface of the fitting hole 18.

Therefore, in the shift lever connecting structure constructed as described above, the small ball portion 16 of the shift lever 15 is provided.
When wear occurs in each of the spring parts 9a, each spring part 9a is displaced by the amount of wear and presses the small ball part 16. Therefore, the deterioration of the vibration absorption characteristics is extremely small.

[0012]

As described above, the small ball portion 16 inevitably moves up and down slightly while the shift lever 15 is being operated. On the contrary, the above-mentioned Japanese Patent Application No. 6-2
In the configuration described in the application of No. 17925, each spring portion 9
a has a structure in which only its base end (upper end) is supported, and is inclined so as to approach the small ball portion 16 toward the front end (lower end). In other words, each leaf spring part 9a has its base end. And the tip have different effective deflection amounts.

Therefore, for example, when the small ball portion 16 moves upward, the contact point between the small ball portion 16 and the leaf spring 9 is changed to each spring portion 9.
It moves to the base end side of a, that is, the small ball portion 16 is held by a portion where the bending amount of each spring portion 9a is small. In that case, each spring portion 9a acting on the small ball portion 16
The pressing load of is naturally small. On the other hand, from this state
When 6 moves to the lower side, the small ball portion 16 of the small ball portion 6 is moved to each spring portion 9a.
Since the tip end side of which the amount of bending is large is held, the pressing load of the leaf spring 9 acting on the small ball portion 16 becomes large.

As described above, Japanese Patent Application No. 6-217925
In the configuration described in No. 6, since the bending amount of each spring portion 9a is partially different, the pressing load acting on the small ball portion 16 becomes unstable as the small ball portion 16 moves up and down. However, in an extreme case, a gap (play) may be generated between the small ball portion 16 and the spring portion 9a, and a rattling sound may be produced.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a connecting structure for a manual shift lever capable of reliably preventing backlash.

[0016]

In order to achieve the above-mentioned object, the present invention has a spherical connecting portion formed at the lower end portion of a shift lever that is tiltably held at an intermediate portion.
In this manual shift lever connecting structure in which the spherical connecting portion is fitted and connected to the operated member, a substantially cylindrical hole portion for inserting the spherical connecting portion is formed in the operated member, and Inside the cylindrical hole, both end portions are supported by the inner peripheral surface of the substantially cylindrical hole portion, and a leaf spring portion having a configuration in which an intermediate portion is convex toward the central axis of the substantially cylindrical hole portion is provided. In addition to being provided, the spherical connecting portion is elastically pressed and held by the intermediate portion of the leaf spring portion.

According to the present invention, when the shift lever is operated, the spherical connecting portion at the lower end of the shift lever is moved, and the operating force is transmitted to the operated member via the leaf spring portion so that the operated member moves in the predetermined direction. Moving. On the other hand, the vibration transmitted from the drive system and the drive transmission system is attenuated / absorbed because the leaf spring portion is elastically displaced.

On the other hand, when the spherical connecting portion is moved in the direction along the central axis of the substantially cylindrical hole portion by operating the shift lever, the contact point between the spherical connecting portion and the intermediate portion of the leaf spring portion is moved. As described above, since the leaf spring portion has a configuration in which both ends of the intermediate portion are supported by the substantially cylindrical hole portion, the partial bending amount hardly changes in the intermediate portion, and therefore the spherical connecting portion does not change. Almost the same pressing load as before the displacement is applied. Therefore, there is no play between the outer surface of the spherical connecting portion and the inner surface of the leaf spring portion.

Further, when wear occurs between the spherical connecting portion and the leaf spring portion, the leaf spring portion elastically returns and displaces and keeps pressing the spherical connecting portion. Play between the shift lever and the operated member is prevented from being deteriorated at the connecting portion between the shift lever and the operated member.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Next, the present invention will be specifically described with reference to the drawings. 1 is a view showing a cross section of this specific example, and FIG. 2 is a view taken along the line II-II of FIG. A shift and select lever shaft 30 connected to a shift fork (not shown) is held so as to reciprocate in the left-right direction in FIG. 1, and a shift lever housing 31 is provided at an intermediate portion of the shift and select lever shaft 30. They are fitted together. Then, the shift lever housing 31 and the shift lever 32 form the spring 3
It is connected through 3.

To be more specific, this shift lever 3
2 has a large sphere portion 34 substantially in the center thereof, a small sphere portion 35 corresponding to a spherical connecting portion is formed at one end, and a shift knob (not shown) is provided at the other end. The large ball portion 34 of the shift lever 32 is arranged in the socket portion 38 of the shift lever retainer 37 via the resin seat 36, and is pressed from the upper portion of the large ball portion 34 toward the seat 36 by the coil spring 39. Has been. That is, the shift lever 32 is swingably supported about its large spherical portion 34, and the operation of the shift knob and the small spherical portion 35 are interlocked with each other.

An extension housing 40 is connected to the shift lever retainer 37, and a thrust ball bearing 41 is provided inside the extension housing 40. The shift and select shaft lever 30 is supported by the thrust ball bearing 41 so as to be movable in the axial direction. A fitting hole 42 into which the small ball portion 35 of the shift lever 32 is inserted is formed in the shift lever housing 31. The fitting hole 42 as a substantially cylindrical hole has, for example, a deformed cylindrical shape in which the inner diameter is larger than the diameter of the small sphere portion 35 and the inner surface of the upper end portion is tapered. As shown in FIG. 2, a notch 43 for fitting and fixing a spring 33, which will be described later, is provided at the edge of the fitting hole 42 on the upper end side.

The spring 33 arranged in the fitting hole 42 will be described with reference to FIGS. 3 (a), 3 (b) and 3 (b). The spring 33 is formed by integrally molding, for example, a steel spring plate material having a substantially constant wall thickness by a press machine or the like, and includes two frame portions 44 arranged parallel to each other at a predetermined interval and each frame. Projecting portions 45 that respectively project outward from the portion 44 in the radial direction, and beam portions 46 that connect the frame portions 44 to each other.
And is constituted by.

More specifically, each frame portion 44 has a shape in which a side wall portion of a cylinder having a low height is partially cut out, that is, a substantially C-shaped cross section. The outer diameter of each frame portion 44 is set to be larger than the inner diameter of the fitting hole 42.
Therefore, when the spring 33 is arranged inside the fitting hole 42, the elastic restoring force of each frame portion 44 causes the inner peripheral surface of the fitting hole 42 to closely contact the outer peripheral surface of each frame portion 44.

As an example of the protrusion 45, a claw portion having a width substantially the same as the width of the notch portion 43 is bent toward the outer peripheral side in the radial direction of the frame portion 44 so as to be orthogonal to the central axis of the frame portion 44. It is made to project, and it is provided in two places of the upper edge part of the frame part 44 located in the upper side in (a) in FIG. 3, and the lower edge part of the frame part 44 located in the lower side. It should be noted that these protrusions 45 are portions that act as a rotation stop when the spring 33 is mounted in the fitting hole 42 and a stoppage in the vertical direction.

The beam portion 46 is a portion corresponding to a leaf spring portion, and as shown in FIG. 3B as an example, the lower edge portion of the upper frame portion 44 and the upper portion of the lower frame portion 44 are It is formed by a strip-shaped support portion 46a connected to the edge portion, and a strip-shaped supported portion 46b whose both ends are integrally connected to these support portions 46a. That is, both supporting portions 46a correspond to both end portions of the leaf spring portion, and the supported portion 46b corresponds to an intermediate portion. Then, as shown in (c) of FIG.
Are provided on the circumference at equal intervals. The supported portion 46b is a portion that holds the small spherical portion 35 in direct contact therewith, and is on the inner peripheral side of the inner peripheral surface of the frame portion 44 by a distance δ1, and is substantially parallel to the central axis thereof. Are arranged. It should be noted that each of the supported portions 46b is substantially linear and is set to have a length substantially equal to the height of the small spherical portion 35. That is, the supported portions 46b facing each other are substantially parallel to each other.

The shift lever 32 constructed as described above
A connecting structure between the shift lever housing 31 and the shift lever housing 31 will be described with reference to the enlarged view shown in FIG. The spring 33 is arranged in the fitting hole 42 of the shift lever housing 31 along the same axis as the central axis of the fitting hole 42. That is, each of the supported portions 46b extends in a direction parallel to the central axis of the fitting hole 42, and is arranged on the circumference around the central axis. Further, one of the protruding portions 45 of the spring 33 is fitted into the cutout portion 43. On the other hand,
The small ball portion 35 of the shift lever 31 is inserted inside the spring 33.

In this state, the supported portion 46 of each beam portion 46 is
A gap is formed between b and the inner surface of the fitting hole 42. More specifically, this gap has a size obtained by subtracting the difference between the dimension from the central axis of the fitting hole 42 or the spring 33 to the surface of the supported portion 46b and the radius of the small spherical portion 35 from the interval δ1. . Therefore, the small ball portion 35 has four beam portions 46.
The (supported portion 46b) is pressed and supported from four directions.

Therefore, the vibrations transmitted from the drive system and the drive transmission system to the shift lever housing 31 are attenuated and absorbed by these beam portions 46, and the shift lever 32 is shifted.
It is designed to prevent the transmission of vibration to. When mounting the spring 33 in the fitting hole 42, both frame portions 4
4 is inserted in the fitting hole 42 in a state of being bent in the radial direction, and the projection 45 is fitted in the notch 43, and then the frame 4 is inserted.
4 may be restored in the radial direction.

Next, the shift lever 32 having the above structure
The operation of the connection structure between the shift lever housing 31 and the shift lever housing 31 will be described. When the driver operates the shift lever knob, the shift lever 32 is swung about the large sphere portion 34, and the small sphere portion 35 of the shift lever 32 moves in the front / rear / left / right directions. Then, the small ball portion 35 slides along the surface of the supported portion 46b of each beam portion 46 and deforms each supported portion 46b.

When the beam portion 46 arranged in the moving direction of the small ball portion 35 comes into contact with the inner surface of the fitting hole 42, the small ball portion 3
5 and the shift lever housing 31 are directly connected, and the gear shift operation is performed. In addition, the protruding portion 4 of the spring 33
Since 5 engages with both edges of the cutout portion 43 and the fitting hole 41, the spring 33 rotates along the axis and the direction of slipping out of the fitting hole 42 even during the series of shift operations described above. Movement is restricted and fixed at the desired position.

Here, if the small ball portion 35 moves up and down inside the fitting hole 42 during operation of the shift lever 32 or the like, naturally,
The contact point between each beam 46 and the small ball 35 moves up and down,
The supported portion 46b at that portion bends toward the inner surface of the fitting hole 42. Here, as described above, the small sphere portion 35 is held by the supported portions 46b that face each other substantially in parallel, and the upper and lower ends of each of the supported portions 46b are supported. The pressing load that acts on is almost unchanged from before the displacement.

In other words, since each supported portion 46b is constructed so as to have a substantially constant amount of bending in the length direction, a gap (play) may occur between the small ball portion 35 and the spring 33. There is no rattling sound. Further, in this specific example, the work of assembling the spring 33 into the fitting hole 42 can be facilitated. Further, since the fitting hole 42 has a cylindrical shape, there is an advantage that the molding / processing is easy.

On the other hand, even if the small sphere portion 35 of the shift lever 32 is worn, each beam portion 46 is displaced by the amount of the wear and presses the small sphere portion 35, so that the deterioration of the vibration absorption characteristic is reduced. There is. Note that the spring 33 arranged here has the same function even if it is a resin molded product. Further, by appropriately setting the material and thickness of the spring 33, the gap between the beam portion 46 and the inner surface of the fitting hole 42, and the like, it is possible to appropriately adjust the moderation feeling from the shift lever 32 for the driver's operation. . For example, if the elastic force of the beam portion is increased, the shift lever housing 31 can be moved without substantially deforming the beam portion, and therefore, the shift lever housing 31.
The feeling of play and looseness at the start of
The shift device can have a high sense of rigidity. In particular, in this specific example, since the metal leaf spring is provided, it operates stably even if high heat is applied.

Although the shift lever housing integrally formed with the shift and select lever shaft has been described in the above specific example, the present invention is not limited to the above specific example, and the shift lever housing and the shift lever housing are not limited to the above specific example. It can also be applied to a shift device in which a push-pull cable or the like is interposed between the AND-select lever shaft.

[0036]

As described above, according to the shift lever connecting structure of the present invention, both end portions are supported inside the substantially cylindrical hole portion and the middle portion is supported by the inner peripheral surface of the substantially cylindrical hole portion. Since the portion is provided with a leaf spring portion configured to be convex toward the central axis of the substantially cylindrical hole, and the intermediate portion of the leaf spring portion elastically presses and holds the spherical connecting portion, the spherical connecting portion It is possible to prevent backlash when the part moves up and down.

[Brief description of drawings]

FIG. 1 is a schematic sectional view showing a specific example of the present invention.

FIG. 2 is a view taken along the line II-II of FIG.

FIG. 3 is a schematic view showing a spring used in a specific example of the present invention.

FIG. 4 is an enlarged view of a main part of FIG. 1;

FIG. 5 is a schematic diagram showing a configuration described in Japanese Utility Model Laid-Open No. 57-42426.

6 is a schematic enlarged view showing a connecting portion between a shift lever and a shift lever housing in the manual transmission shown in FIG.

FIG. 7 is an enlarged view of a main part of a shift lever connecting structure according to the application of Japanese Patent Application No. 6-217925.

FIG. 8 is a view showing a leaf spring and a fitting hole.

[Explanation of symbols]

 31 shift lever housing 32 shift lever 35 small ball part (spherical connection part) 42 fitting hole (generally cylindrical hole part) 46 beam part (leaf spring part) 46a support part (both ends) 46b supported part (intermediate part)

Claims (1)

[Claims] 1. A manual shift lever connecting structure in which a spherical connecting portion is formed at a lower end portion of a shift lever held tiltably at an intermediate portion, and the spherical connecting portion is fitted and connected to an operated member, A substantially cylindrical hole portion for inserting the spherical connecting portion is formed in the operated member, and both end portions are supported inside the substantially cylindrical hole portion on the inner peripheral surface of the substantially cylindrical hole portion. And a leaf spring portion having a configuration in which an intermediate portion is convex toward the central axis of the substantially cylindrical hole portion is provided, and the spherical connecting portion is elastically pressed by the intermediate portion of the leaf spring portion. The manual shift lever connection structure is characterized in that it is held in place.