JPH09272358A - Shift lever device for automatic transmission - Google Patents

Abstract

PROBLEM TO BE SOLVED: To euchance the sealing property between a shift lever device having a control lever projected to the outside from the opening part of the floor of a car body and the car body. SOLUTION: An expansion/contraction part 28a, positioned inside the opening part 19 of a floor 18, in which the end part of a control lever 24 connected to a transmission side is inserted and a seal part 28b positioned outside the opening part 19 are formed on a boot consisting of an elastic body. A hole 27a in which the control lever 24 is inserted and a seal surface 26b for push- pressing the seal part 28b of the boot 28 across an entire periphery are formed on a seal plate 26 installed to the base plate 26.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seal structure for a shift lever device for an automatic transmission of a vehicle.

[0002]

2. Description of the Related Art FIGS. 6 to 8 show an example of a conventional shift lever device. In FIG. 6, reference numeral 11 denotes a base plate, and a shift lever 13 is swingably supported by the base plate 11 via a shaft 12. A control lever 14 for transmitting the movement of the shift lever 13 to an automatic transmission is attached to the end of the shaft 12. The control lever 14 is inserted through the opening 2 formed in the vehicle body 1. A seal rubber 15 is arranged on the outer periphery of the opening 2 of the vehicle body 1. A seal plate 16 is attached to the base plate 11. As shown in FIG.
The seal plate 16 is attached to the base plate 11 by being pushed into the groove of the base plate 11. When the attachment of the seal plate 16 is completed, the base plate 11 is fastened to the vehicle body 1 by bolts or the like, and the seal rubber 15 is compressed and deformed by the pressing force of the base plate 11 and the seal plate 16.

[0003]

However, in the shift lever device of FIGS. 6 to 8, since the base plate 11 and the seal plate 16 are composed of separate members, the mounting height of the seal plate 16 with respect to the base plate 11 is different. There are variations. Therefore, as shown in FIG. 8, when the mounting height of the seal plate 16 with respect to the base plate 11 becomes low, the seal rubber 15 cannot be sufficiently compressed and deformed over the entire circumference. On the contrary, when the mounting height of the seal plate 16 with respect to the base plate 11 becomes high, only the seal rubber 15 is compressed and deformed by the seal plate 16, and the reseal rubber 15 cannot be sufficiently deformed by the base plate 11. Therefore, in the conventional shift lever device in which the seal rubber 15 is pressed by another member, the seal rubber 15 cannot be uniformly compressed and deformed over the entire circumference, and the sealing performance becomes incomplete. In addition, the base plate 11 and the seal plate 16
Is exposed to the outside through the opening 2 formed in the vehicle body 1, so that water, dust, and the like easily enter through the opening 2. Especially in winter, snow-melting agents may be sprinkled on the road,
The snow-melting agent easily adheres to the base plate 11 and the seal plate 16, and the base plate 11 and the seal plate 16
Had to be constructed from expensive materials that were chemically strong against the snow-melting agent.

An object of the present invention is to provide a shift lever device for an automatic transmission, which can improve the sealing performance between the vehicle body and the vehicle body.

[0005]

A shift lever device for an automatic transmission according to the present invention which achieves the above object is as follows. A base plate fixed to the vehicle body and swingably supporting the shift lever, and an end portion that is interlocked with the shift lever and is connected to the transmission side protrudes outward from an opening formed in the floor of the vehicle body. A boot made of an elastic body having a control lever and an elastic part into which the control lever is inserted at a position located inside the peripheral edge of the opening, and a seal part extending from the elastic part to the outside of the peripheral edge of the opening. And a seal plate having a hole provided in the base plate, into which the control lever is inserted, and a seal surface that presses the seal portion of the boot against the floor of the vehicle body over the entire circumference. Lever device.

In the shift lever device for the automatic transmission described above,
Since the seal portion of the boot is pressed only by the seal plate, the variation in mounting height of the seal plate with respect to the base plate poses no problem, and the seal portion of the boot can be uniformly and sufficiently compressed over the entire circumference.
Therefore, the seal portion of the boot can be brought into close contact with the floor of the vehicle body by pressing the seal plate, and the sealability between the seal plate and the floor of the vehicle body can be improved. Further, since the opening portion of the floor of the vehicle body is closed by the expansion and contraction portion of the boot, it is possible to prevent water and dust from entering the vehicle interior, and it is possible to enhance the durability and reliability of each member. If the base plate and the seal plate are integrally molded, the number of parts of the device can be reduced and the device can be easily assembled.

[0007]

1 to 3 show a first embodiment of the present invention.
1 shows a shift lever device for an automatic transmission according to an embodiment, and FIGS. 4 and 5 show a shift lever device for an automatic transmission according to a second embodiment of the present invention. Both of the embodiments show the case where the invention is applied to a gate type shift lever device. First, a configuration common to both embodiments will be described with reference to FIGS. 1 to 3, for example. The same reference numerals are given to constituent parts common to both embodiments.

In FIG. 1, reference numeral 20 denotes a base plate fixed to the floor 18 side of the vehicle body. The base plate 20 is made of synthetic resin (for example, polypropylene mixed with glass fibers). A shift lever 22 is supported on the base plate 20 via a shaft 21. The shift lever 22 is swingable in the vehicle front-rear direction and the vehicle left-right direction, and is provided with P, R, N, and
Positioning is possible in each range of D, 3, 2, and L. A control lever 24 extending downward is attached to the shaft 21. An opening 19 is formed in the floor 18. The lower end of the control lever 24 projects downward from the opening 19. As shown in FIG. 3, the base plate 20 is formed in a box shape having an open top. A shift lock stopper 23 that prevents the shift operation of the shift lever 22 located in the P range in the vehicle left-right direction is arranged below the base plate 20.

A seal plate 26 is provided below the base plate 20. At the center of the seal plate 26, there is an elongated hole 2 through which the control lever 24 is inserted.
7a (slit) is formed. The elongated hole 27a extends in the vehicle front-rear direction, which is the moving direction of the control lever 24. A plurality of engaging claws 27b capable of engaging with the base plate 20 and a plurality of holding holes 27c are formed on the outer peripheral portion of the seal plate 26. Seal plate 2
A seal surface 26b extending in the circumferential direction is formed at 6. A concave portion 26c extending in the circumferential direction is formed on the inner peripheral side of the seal surface 26b. On the outer peripheral side of the sealing surface 26b,
A convex portion 26d extending in the circumferential direction is formed. The distance (step) between the seal surface 26b and the convex portion 26d of the seal plate 26 is set to T.

A boot 28 made of an elastic material (eg, rubber) is provided between the floor 18 and the seal plate 26. The boot 28 is located inside the peripheral edge of the opening 19 and has a telescopic portion 28a into which the control lever 24 is inserted.
And a seal portion 28b extending from the stretchable portion 28a to the outside of the peripheral edge of the opening 19. The expandable part 28a has a corrugated cross-section so that it can be easily elastically deformed in the vehicle front-rear direction according to the movement of the control lever 24. The inner peripheral surface of the insertion hole 28c into which the control lever 24 of the expandable portion 28a is inserted is in close contact with the outer peripheral surface of the control lever 24. The seal portion 28b extends in the circumferential direction. The recessed portion 2 of the seal plate 26 is provided in the seal portion 28b.
A convex portion 28d that extends in the circumferential direction and that is fitted into 6c is formed. The thickness of the seal portion 28b is the same as that of the seal plate 26.
It is set to be larger than the distance T between the sealing surface 26b and the convex portion 26d at the predetermined amount by a predetermined amount. On the upper surface of the seal portion 28b, holding protrusions 28e to be inserted into the plurality of holding holes 27c of the seal plate 26 are formed.

Next, the specific configuration of each embodiment will be described. In the first embodiment, as shown in FIGS. 1 to 3, the control lever 2 is provided at one end of the shaft 21.
4 is attached by welding. A ring that prevents axial displacement of the shaft 21 is attached to the other end of the shaft 21. The seal plate 26 is a separate member from the base plate 20. The seal plate 26 is made of synthetic resin (for example, polypropylene in which glass fibers are mixed), and is integrally molded by injection molding, for example. The seal plate 26 has a substantially elliptical planar shape.

In the second embodiment, as shown in FIGS. 4 and 5, a head portion bulging in the radial direction is formed at one end of the large diameter portion 21a of the shaft 21. A small diameter portion 21c is formed at the other end of the large diameter portion 21a. Small diameter part 2
A male screw 21 to which a nut 31 is screwed is attached to the tip of 1c.
d is formed. On the outer peripheral surface of the small diameter portion 21c, two flat engaging surfaces 21e are provided so as to face each other. The control lever 24 is formed with a hole 24a that fits into the small diameter portion 21c of the shaft 21. The shaft 21 is configured such that the engaging surface 21e engages with the engaging surface 24b formed on the inner peripheral surface of the hole 24a of the control lever 24 around the axis. Control lever 24
When the engaging surface 24b engages with the engaging surface 21e of the shaft 21, it is attached with a predetermined phase difference around the shaft 21 and the shaft center. The thickness of the bearing portion 20a of the base plate 20 in the width direction is set to a. The distance from the step surface between the large diameter portion 21a and the small diameter portion 21c of the shaft 21 to one end of the engaging surface 21e is set to a. As a result, the shaft 21 is retained in the axial direction with little play, and smooth movement around the axial center is ensured.

As shown in FIG. 4, in the second embodiment, the seal plate 26 is integrally formed with the base plate 20. The distance between one side surface of the elongated hole 27a of the seal plate 26 and one side surface of the control lever 24 is b
Is set to The distance between the other side surface of the slot 27a and the other side surface of the control lever 24 is set to c. The length of the slot 27a in the width direction can be minimized by reducing the distances a and b.
As a result, the sealability of the seal plate 26 can be enhanced, and the strength and rigidity of the seal plate 26 can be prevented from decreasing.

Next, the procedure for assembling the shift lever device for an automatic transmission will be described. First, the assembly procedure in the first embodiment will be described. As shown in FIG. 3, the single seal plate 26 and the boot 28 are aligned with each other, and the holding projections 28 e of the boot 28 are inserted into the holding holes 27 c of the seal plate 26. Holding projection 28e
Since an engaging step that bulges in the radial direction is provided at the root portion of the, the engaging step and the peripheral edge of the holding hole 27c are separated from each other when the holding projection 28e is completely inserted into the holding hole 27c. The boot 28 is assembled in a state in which the boot 28 and the boot 28 are in close contact with each other. In this state, the boots 28
The convex portion 28 d is fitted in the concave portion 26 c of the seal plate 26. Seal plate 2 integrated with boot 28
Next, 6 is attached to the lower part of the base plate 20.

The seal plate 26 is attached to the base plate 20.
When assembled in, the control lever 24 is inserted into the elongated hole 27a of the seal plate 26 and the insertion hole 28c of the boot 28. Since the engaging claw 27b is formed on the seal plate 26, the seal plate 26 can be assembled to the base plate 20 by pressing the seal plate 26 toward the base plate 20 in this state. When the assembly of the seal plate 26 to the base plate 20 is completed, the tip portion (swivel portion) of the control lever 24 projects from the insertion hole 28c of the boot 28. Next, the tip of the control lever 24 is connected to a transmission (not shown) via a rod (not shown).

In the second embodiment, the control lever 24 and the shaft 21 are assembled before the boot 28 is assembled. The shaft 21 is, as shown in FIG.
It is inserted into the bearing portion 20a of the base plate 26 from the direction of the arrow. A control lever 24 is attached to the small diameter portion 21c of the shaft 21 protruding from the bearing portion 20a. The control lever 24 is fixed to the shaft 21 by tightening a nut 31 screwed to the male screw 21d. Next, the boot 28 is aligned with the seal plate 26, and the projection 28e for holding the boot 28 is inserted into a holding hole (not shown) of the seal plate 26. Since an engaging step that bulges in the radial direction is provided at the base portion of the retaining projection 28e, the boot 28 is substantially attached to the seal plate 26 when the retaining projection 28e is completely inserted into the retaining hole. Assembled in close contact. In this state, the convex portion 28d of the boot 28 has the seal plate 2
6 is fitted in the recess 26c. When the assembly of the boot 28 to the seal plate 26 is completed, the tip portion (swivel portion) of the control lever 24 projects from the insertion hole 28c of the boot 28. The tip of the control lever 24 is connected to a transmission (not shown) via a rod (not shown). In the second embodiment, the seal plate 26 is formed integrally with the base plate 26,
The number of parts of the device can be reduced, and the assembling of the seal plate 26 to the base plate 20 is not necessary, so that the efficiency of the assembling work can be improved.

Next, the common operation of the first and second embodiments will be described. When the connection between the control lever 24 and the transmission is completed, the base plate 20 is fastened to the floor 18 of the vehicle body via bolts (not shown) inserted in the bolt holes 29. When fastening the base plate 20 to the floor 18, the boot 28
The seal portion 28 b of the above is compressed by the upper surface of the floor 18 and the seal surface 26 b of the seal putt 26. Seal part 28
The thickness of b is the seal surface 26 of the seal plate 26.
Since it is set to be larger than the distance T between the b and the convex portion 26d, the seal portion 28b is the convex portion 26 of the seal plate 26.
It elastically deforms in the compression direction until d contacts the upper surface of the floor 18.

When the base plate 20 is fastened to the floor 18, the convex portion 26d of the seal plate 26 is fixed to the floor 18.
Since it comes into contact with the upper surface of the seal member 28b, the seal portion 28b can be elastically deformed in the compression direction by a predetermined amount regardless of the tightening force of the bolt. Further, since the seal plate 26 is a molded product formed by injection molding, the height of the seal surface 26b does not vary due to assembly, and the seal portion 28b is formed.
Is uniformly pressed against the upper surface of the floor 18 by the sealing surface 26b. Therefore, the seal portion 28b is in close contact with the upper surface of the floor 18 over the entire circumference, and the sealing property between the seal plate 26 and the floor 18 is improved.

The elastic portion 28a of the boot 28 has an opening 19
Is located inside the control lever 24, and the inner peripheral surface of the insertion hole 28c into which the control lever 24 is inserted is
Since it is in close contact with the outer peripheral surface of the boot,
Is closed. Therefore, the base plate 20 and the seal plate 26 are not exposed on the road surface side. Therefore, even if the snow-melting agent (eg, calcium chloride) is sprinkled on the road surface in winter, the snow-melting agent will pass through the opening 19 and the base plate 20 and the seal plate 26.
It is possible to prevent adherence to the base plate 20 and the seal plate 26, and it is not necessary to use an expensive material (for example, nylon) in consideration of a snow melting agent. Moreover, since the control lever 24 is inserted into the narrow hole 27a of the seal plate 26, most of the opening 19 is also blocked by the seal plate 26, and the transmitted sound can be reduced. .

[0020]

The shift lever device for an automatic transmission according to the present invention has the following advantages. (1) Since the seal portion of the boot is pressed only by the seal plate, the variation in the mounting height of the seal plate with respect to the base plate has nothing to do with the sealing property, and the seal portion of the boot is uniformly and sufficiently over the entire circumference. Can be compressed into. Therefore, the seal portion of the boot can be brought into close contact with the floor of the vehicle body, and the sealability between the seal plate and the floor of the vehicle body can be improved. (2) Since the opening portion of the floor of the vehicle body is closed by the stretchable portion of the boot, it is possible to prevent water and dust from entering the vehicle interior. In particular, since it is possible to prevent intrusion from the opening of the snow-melting agent spread on the road surface in winter, it is not necessary to use an expensive material considering the snow-melting agent for the base plate and the seal plate, which can reduce the cost of the shift lever device. it can.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of a shift lever device for an automatic transmission according to a first embodiment of the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is an exploded perspective view of the apparatus of FIG.

FIG. 4 is a sectional view of an essential part of a shift lever device for an automatic transmission according to a second embodiment of the present invention.

5 is an exploded perspective view of the device of FIG.

FIG. 6 is a cross-sectional view of essential parts showing an example of a conventional shift lever device for an automatic transmission.

FIG. 7 is a side view showing a state immediately before the seal plate of FIG. 6 is assembled to the base plate.

FIG. 8 is a side view showing a state where the seal plate of FIG. 6 is assembled to a base plate.

[Explanation of symbols]

 18 Floor of Vehicle Body 19 Opening 20 Base Plate 24 Control Lever 26 Seal Plate 26b Sealing Surface 28 Boots 28a Expansion / Contraction 28b Sealing

Claims (1)

[Claims] 1. A base plate fixed to a vehicle body for swingably supporting a shift lever, and an end portion interlocked with the shift lever and connected to a transmission side from an opening formed on a floor of the vehicle body. A control lever projecting outward, an elastic part into which the control lever is inserted, located inside the peripheral edge of the opening, and a seal part extending from the elastic part to the outside of the peripheral edge of the opening. A boot made of an elastic body, a hole provided in the base plate, into which the control lever is inserted, and a seal plate having a seal surface for pressing the seal portion of the boot against the floor of the vehicle body over the entire circumference, Shift lever device for automatic transmission.