JP3192966B2 - Shift lever device for automatic transmission - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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, on which a shift lever 13 is swingably supported via a shaft 12. A control lever 14 that transmits the movement of the shift lever 13 to the automatic transmission is attached to an end of the shaft 12. The control lever 14 is inserted through an 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 mounted on 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 between the base plate 11 and the seal plate 16 due to the fastening force.

[0003]

However, in the shift lever device shown in FIGS. 6 to 8, since the base plate 11 and the seal plate 16 are formed as separate members, the height at which the seal plate 16 is assembled to the base plate 11 is reduced. Variations occur. For this reason, as shown in FIG. 8, when the height of the seal plate 16 attached to the base plate 11 is reduced, the seal rubber 15 cannot be sufficiently compressed and deformed over the entire circumference. Conversely, when the mounting height of the seal plate 16 with respect to the base plate 11 is increased, only the compressive deformation of the seal rubber 15 is performed by the seal plate 16, and the reseal rubber 15 cannot be sufficiently compressed and 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, resulting in incomplete sealing. Further, 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 the winter season, snow melting agent is sometimes sprayed on the road surface,
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
Must be made of an expensive material that is chemically resistant to the snow melting agent.

[0004] It is an object of the present invention to provide a shift lever device for an automatic transmission capable of improving the sealing performance with a vehicle body.

[0005]

A shift lever device for an automatic transmission according to the present invention which achieves the above object is as follows. Is fixed to the vehicle body, and a base plate for supporting the shift lever swingably, in conjunction with the shift lever, protrudes outward from an opening end that is connected to the transmission side is formed on the vehicle body floor ,
Fixed to the end of the shaft supported by the base plate.
An elastic portion having a control lever attached thereto and a telescopic portion into which the control lever is inserted at a position located inside the periphery of the opening, and a seal portion extending from the telescopic portion to the outside of the periphery of the opening. A boot formed of a body, a hole provided in the base plate, into which the control lever is inserted , and closing an opening of a floor of the vehicle body;
A shift lever device for an automatic transmission, comprising: a seal plate having a seal surface that closes and presses the seal portion of the boot onto the floor of the vehicle body over the entire circumference.

In the shift lever device for an automatic transmission,
The seal plate closes the opening formed on the body floor
It blocks the sound transmitted through the opening.
Wear. Further, since the seal portion of the boot is pressed only by the seal plate, variation in the mounting height of the seal plate with respect to the base plate does not matter, 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 sealing performance between the seal plate and the floor of the vehicle body can be improved. Further, since the opening of the floor of the vehicle body is closed by the elastic 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 reliability of each member. If the base plate and the seal plate are integrally formed, the number of parts of the device can be reduced, and the assembly of the device becomes easy.

[0007]

1 to 3 show a first embodiment of the present invention.
4 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 embodiments show a case where the present invention is applied to a gate type shift lever device. First, a configuration common to both embodiments will be described with reference to, for example, FIGS. Components common to both embodiments are denoted by the same reference numerals.

In FIG. 1, reference numeral 20 denotes a base plate fixed to the floor 18 of the vehicle body. The base plate 20 is made of a 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.
Positioning is possible in each of D, 3, 2 and L ranges. 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 whose upper part is open. A shift lock stopper 23 that prevents a shift operation of the shift lever 22 located in the P range in the left-right direction of the vehicle is disposed below the base plate 20.

A seal plate 26 is provided below the base plate 20. The central portion of the seal plate 26 has a long hole 2 through which the control lever 24 is inserted.
7a (slits) are formed. The elongated hole 27a extends in the vehicle front-rear direction, which is the direction in which the control lever 24 moves. 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
6, a seal surface 26b extending in the circumferential direction is formed. 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 projection 26d extending in the circumferential direction is formed. The distance (step) between the sealing surface 26b and the projection 26d in the seal plate 26 is set to T.

[0010] A boot 28 made of an elastic material (for example, rubber) is provided between the floor 18 and the seal plate 26. The boot 28 is located inside the periphery of the opening 19 and has a telescopic part 28a into which the control lever 24 is inserted.
And a seal portion 28b extending from the elastic portion 28a to the outside of the periphery of the opening portion 19. The elastic portion 28a has a corrugated cross-sectional shape so that it can be easily elastically deformed in the vehicle front-rear direction in response to the movement of the control lever 24. The inner peripheral surface of the insertion hole 28c of the extendable portion 28a into which the control lever 24 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 seal portion 28b has a concave portion 2 of the seal plate 26.
A protrusion 28d extending in the circumferential direction to be fitted into 6c is formed. The thickness of the seal portion 28b is
Is set to be larger by a predetermined amount than the distance T between the sealing surface 26b and the projection 26d. On an upper surface of the seal portion 28b, a holding projection 28e to be inserted into the plurality of holding holes 27c of the seal plate 26 is formed.

Next, a specific configuration of each embodiment will be described. In the first embodiment, as shown in FIG. 1 to FIG.
4 is attached by welding. The other end of the shaft 21 is provided with a ring for preventing the shaft 21 from being displaced in the axial direction. The seal plate 26 is configured as a separate member from the base plate 20. The seal plate 26 is made of a synthetic resin (for example, polypropylene mixed with glass fibers), and is integrally formed by, for example, injection molding. The seal plate 26 has a substantially elliptical planar shape.

In the second embodiment, as shown in FIGS. 4 and 5, one end of the large diameter portion 21a of the shaft 21 has a head bulging in the radial direction. A small diameter portion 21c is formed at the other end of the large diameter portion 21a. Small diameter part 2
1c has a male screw 21 to which a nut 31 is screwed.
d is formed. On the outer peripheral surface of the small diameter portion 21c, two flat engagement surfaces 21e are provided 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 has an engagement surface 21e engaged around an axis with an engagement surface 24b formed on the inner peripheral surface of the hole 24a of the control lever 24. Control lever 24
The shaft 21 is attached to the shaft 21 with a predetermined phase difference around the axis by engaging the engaging surface 24b with the engaging surface 21e of the shaft 21. The thickness in the width direction of the bearing portion 20a of the base plate 20 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 engagement surface 21e is set to a. As a result, the shaft 21 is held almost without play in the axial direction, and a smooth movement around the axis is ensured.

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

Next, the procedure for assembling the shift lever device for an automatic transmission will be described. First, an assembly procedure in the first embodiment will be described. As shown in FIG. 3, the positioning of the seal plate 26 and the boot 28 is performed, and the holding projection 28 e of the boot 28 is inserted into the holding hole 27 c of the seal plate 26. Holding projection 28e
Since the engagement step which swells in the radial direction is provided at the base of, when the holding projection 28e is completely inserted into the holding hole 27c, the engagement step and the peripheral edge of the holding hole 27c are separated. The boot 28 is engaged with the seal plate 26 so as to be substantially in close contact therewith. In this state, the boot 28
Is fitted in the concave portion 26c of the seal plate 26. Seal plate 2 integrated with boot 28
6 is then assembled to the lower part of the base plate 20.

The seal plate 26 is connected to the base plate 20
When assembling, the control lever 24 is inserted into the long hole 27a of the seal plate 26 and the insertion hole 28c of the boot 28. Since the engagement 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 (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 from the arrow direction in the bearing portion 20a of the base plate 2 0. A control lever 24 is attached to a 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 holding projection 28 e of the boot 28 is inserted into a holding hole (not shown) of the seal plate 26. At the base of the holding projection 28e, an engagement step that swells in the radial direction is provided, so that when the holding projection 28e is completely inserted into the holding hole, the boot 28 Assembled in close contact. In this state, the projection 28d of the boot 28 is
6 is fitted into the recess 26c. When the mounting of the boot 28 on the seal plate 26 is completed, the distal end portion (swivel portion) of the control lever 24 projects from the insertion hole 28c of the boot 28. The distal end of the control lever 24 is connected to a transmission (not shown) via a rod (not shown). In the second embodiment, since the seal plate 26 is integrally formed with the base plate 2 0,
The number of parts of the apparatus can be reduced, and the assembly of the seal plate 26 to the base plate 20 becomes unnecessary, so that the efficiency of the assembling operation can be improved.

Next, the operation common to 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 a bolt (not shown) inserted into a bolt hole 29. When fastening the base plate 20 to the floor 18, the boot 28
Is compressed by the upper surface of the floor 18 and the sealing surface 26b of the seal putt 26. Seal part 28
The thickness of the sealing surface 26 of the seal plate 26
b is set to be larger than the distance T between the protrusion 26 d and the protrusion 26 d, the seal portion 28 b
Until d contacts the upper surface of the floor 18, it is elastically deformed in the compression direction.

When the base plate 20 is fastened to the floor 18, the projection 26d of the seal plate 26 is
Abuts on the upper surface of the seal portion 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 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 performance between the seal plate 26 and the floor 18 is improved.

The elastic portion 28a of the boot 28 has an opening 19
The inner peripheral surface of the insertion hole 28c into which the control lever 24 is inserted is located inside the control lever 24.
The opening 19 is in close contact with the outer peripheral surface of the
Is closed. Therefore, the base plate 20 and the seal plate 26 are not exposed on the road surface side. Therefore, even if a snow-melting agent (for example, calcium chloride or the like) is sown on the road surface in winter, the snow-melting agent is applied to the base plate 20 and the seal plate 26
It is not necessary to use an expensive material (for example, nylon) for the base plate 20 and the seal plate 26 in consideration of the snow melting agent. Further, since the control lever 24 is inserted into the narrow hole 27a of the seal plate 26 having a small width, most of the opening 19 is also closed by the seal plate 26, so that transmitted sound can be reduced. .

[0020]

According to the shift lever device for an automatic transmission according to the present invention, the following effects can be obtained. (1) Seal plate is an opening formed on the floor of the vehicle
Part, so that sound transmitted through the opening can be reduced.
Can be. (2) 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 no relation to the sealing property, and the seal portion of the boot is uniform and sufficient over the entire circumference. Can be compressed. Therefore, it is possible to adhere the seal portion of the boot to the floor of the vehicle body, it is possible to improve the sealing performance between the sealing plate and the body of the flow A. (3) Since the opening of the floor of the vehicle body is closed by the elastic 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 expensive materials considering the snow melting agent for the base plate and the seal plate, and it is possible to reduce the cost of the shift lever device. it can.

[Brief description of the drawings]

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

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

FIG. 6 is a sectional view of a main part showing an example of a conventional shift lever device for an automatic transmission.

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

 Reference Signs List 18 Body floor 19 Opening 20 Base plate 24 Control lever 26 Seal plate 26b Seal surface 28 Boot 28a Telescopic portion 28b Seal portion

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B60K 20/00-20/08 F16K 59/00-59/12 G05G 1/00-25/04

Claims (1)

(57) [Claims] 1. A base plate fixed to a vehicle body side for swingably supporting a shift lever, and an end coupled to the shift lever and connected to a transmission side extends from an opening formed in a floor of the vehicle body. outwardly projecting, Shah supported on said base plate
A control lever fixedly attached to the end of the shaft, and a telescopic part into which the control lever is inserted at a position located inside the periphery of the opening, and from the telescopic part to the outside of the periphery of the opening A boot made of an elastic body having a seal portion extending to the base plate, a hole provided in the base plate, into which the control lever is inserted, and an opening in a floor of the vehicle body.
A shift plate for an automatic transmission, comprising: a seal plate that is closed and has a seal surface that presses the seal portion of the boot against the floor of the vehicle body over the entire circumference.