JP6008271B2 - Control switch for automatic transmission - Google Patents

Description

  The present invention relates to a control switch for an automatic transmission that generates a position signal indicating a shift position such as parking, reverse, neutral, drive, second speed, and first speed by switching operation of a shift lever of an automatic transmission in an automobile.

  Conventionally, as a control switch for an automatic transmission, a movable body that rotates in a housing in response to a switching operation of a shift lever of the automatic transmission has been provided. It is known that a plurality of fixed contacts that contact and separate from the movable contact are provided in the housing, and a position signal indicating the shift position of the automatic transmission corresponding to the combination of the movable contact and fixed contact that contacts or separates is output. (For example, refer to Patent Document 1).

  In Patent Document 1, an annular oil seal is accommodated in a bearing hole of a bearing portion formed in a cover that constitutes the housing, thereby improving the sealing performance of the housing in the bearing portion and maintaining the airtightness inside the housing. ing.

JP 2007-155068 A

  However, in the above-described conventional technology, the air tightness inside the housing can be maintained by simply housing the annular oil seal in the bearing hole of the bearing portion. Therefore, it is necessary to form a cover so that the bearing portion is a perfect circle, and to suppress the deterioration of the sealing performance due to the movement of the stored oil seal or the like. As described above, the conventional technique requires a processing accuracy of the cover, and thus there is a problem that the control switch for automatic transmission cannot be easily manufactured.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an automatic transmission control switch that can be easily manufactured while improving the sealing performance of a housing in a bearing portion.

A first feature of the present invention includes a movable body that rotates in a housing in response to a switching operation of a shift lever of an automatic transmission. The movable body is provided with a movable contact, and according to the rotational position of the movable body. For automatic transmissions that have multiple fixed contacts in the housing that come into contact with or separate from the movable contacts, and output a position signal that indicates the shift position of the automatic transmission corresponding to the combination of the movable contacts and fixed contacts that make contact or separation A control switch, the housing having a bearing portion in which a shaft hole of the movable body is inserted and pivotally supported so as to be pivotally supported; and the shaft portion of the movable body is used as a bearing portion of the housing. and a oil seal attached to the mounting portion formed in the insertion state, the bearing portion includes a side wall portion provided with a bottom wall portion provided continuously to the side wall portion, said mounting portion The serial housing side, the fixed portion is provided with a hole through which the oil seal is being in fixed pushed, the fixing portion is a portion including a boundary line between the side wall and the bottom wall portion of the bearing portion The gist is that it is formed .

The gist of the second feature of the present invention is that the fixing portion is a recess or a through-hole that holds a part of the oil seal.

According to a third aspect of the present invention, the oil seal includes a support portion positioned at a central portion in a state where the oil seal is attached to the attachment portion, an inner piece continuously provided on the inner side of the support portion, and the support portion. An outer piece continuously provided on the outside, and one end of the outer piece of the oil seal is fixed to the hole of the fixing portion .
According to a fourth aspect of the present invention, a movable body that rotates in the housing in response to a shift lever switching operation of the automatic transmission is provided, a movable contact is provided on the movable body, and the movable body according to the rotational position of the movable body. For automatic transmissions that have multiple fixed contacts in the housing that come into contact with or separate from the movable contacts, and output a position signal that indicates the shift position of the automatic transmission corresponding to the combination of the movable contacts and fixed contacts that make contact or separation A control switch, the housing having a bearing portion in which a shaft hole of the movable body is inserted and pivotally supported so as to be pivotally supported; and the shaft portion of the movable body is used as a bearing portion of the housing. An oil seal attached to an attachment portion formed in the inserted state, and the oil seal is attached to the attachment portion, and the support portion located in the center portion, An inner piece continuously provided on the inner side of the holding portion, and an outer piece provided continuously on the outer side of the support portion, and the oil seal is pushed into the housing side of the attachment portion. The gist is that a fixing portion having a hole to which one end of the outer piece of the oil seal is fixed is provided .
The fifth feature of the present invention is summarized in that the fixing portion is a concave portion or a through hole that holds a part of the oil seal .

  According to the present invention, the fixing portion for fixing the oil seal is provided on the mounting portion formed in a state where the shaft portion of the movable body is inserted into the bearing portion of the housing. In this manner, by fixing the oil seal to the fixing portion, it is possible to suppress the oil seal attached to the attachment portion from moving. Therefore, it is not necessary to increase the roundness of the bearing portion in order to prevent the sealing performance at the bearing portion from being deteriorated. That is, it is not necessary to increase the processing accuracy of the cover. As a result, it is possible to obtain an automatic transmission control switch that can be easily manufactured while enhancing the sealing performance of the housing in the bearing portion.

It is a disassembled perspective view of the control switch for automatic transmissions concerning one Embodiment of this invention. It is a perspective view of the control switch for automatic transmissions concerning one Embodiment of this invention. It is explanatory drawing which shows operation | movement of the movable contact and fixed contact concerning one Embodiment of this invention. It is a perspective view of the movable body concerning one Embodiment of this invention. It is a perspective view which shows the assembly | attachment state of the movable body concerning one Embodiment of this invention, and a shaft. It is a perspective view which shows the cover and oil seal concerning one Embodiment of this invention. It is a perspective view which expands and shows the fixing | fixed part of the cover concerning one Embodiment of this invention. It is a figure which shows the state which attached the oil seal to the attaching part concerning one Embodiment of this invention, Comprising: It is sectional drawing cut | disconnected so that a fixing | fixed part may be included. It is sectional drawing which expands and shows the A section of FIG. It is a figure which shows the state which attached the oil seal to the attaching part concerning one Embodiment of this invention, Comprising: It is sectional drawing cut | disconnected so that a fixing | fixed part may not be included. It is sectional drawing which shows the state which attached the oil seal to the attaching part concerning the modification of one Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  First, a schematic configuration of the automatic transmission control switch 1 will be described with reference to FIGS.

  As shown in FIGS. 1 and 2, the automatic transmission control switch 1 according to the present embodiment includes a housing 10 and a movable body 40 that is rotatably housed in the housing 10.

  The housing 10 includes a body 20 and a cover 30 made of a synthetic resin molded product each formed in a substantially fan shape.

  The movable body 40 includes a main body portion 41 and a shaft portion 42 that is connected to the main body portion 41. A plurality of movable contacts 47 elastically biased toward the body 20 by a coil spring 46 are accommodated in a recess (not shown) provided on the surface of the main body 41 facing the body 20. In FIG. 1, only one movable contact 47 is shown for convenience.

  The shaft portion 42 includes a cylindrical tube portion 43 and a circular flange portion 44 formed at the center portion of the tube portion 43. The cylinder portion 43 is connected to the main body portion 41 via the flange portion 44. In the present embodiment, the flange portion 44 is integrally connected to the lower portion in the thickness direction (axial direction) of the main body portion 41, and by providing such a connection, the movable body 40 has an upper surface 45 a and a lower surface. A stepped portion 45 having 45b and side surfaces 45c is formed.

  As shown in FIGS. 4 and 5, the shaft 42 of the movable body 40 penetrates along the axial direction, and the shaft 70 of the automatic transmission is press-fitted through a protective plate (not shown). A press-fitting hole 43b is provided. The press-fitting hole 43b includes an inner wall surface 43c having substantially the same shape as the cross section of the shaft 70, which is a substantially polygonal shape.

  The body 20 is formed in a flat, substantially fan shape with one surface (upper surface in FIG. 1) opened. A bearing hole 21 into which one end side of the shaft portion 42 of the movable body 40 (the lower side of the cylinder portion 43 in FIG. 1) is inserted is a thickness direction (axial direction) in a portion corresponding to the main part of the fan of the body 20. It is penetrated by. Further, the peripheral portion 20 f of the bearing hole 21 of the body 20 is formed to be one step lower than the peripheral portion 20 a of the body 20. When one end side of the shaft portion 42 of the movable body 40 (below the cylinder portion 43 in FIG. 1) is inserted into the bearing hole 21, one end surface (the lower surface in FIG. 1) of the flange portion 44 is the bearing hole 21. The shaft portion 42 of the movable body 40 is pivotally supported by the body 20 so as to be capable of sliding contact with the peripheral edge portion 20f.

  A plurality of strip-shaped conductors 20d each having a fixed contact 20c provided at one end thereof are insert-molded on the inner bottom surface 20b of the body 20. Each fixed contact 20 c is arranged in a concentric arc shape with the bearing hole 21 as the center, and is opposed to the movable contact 47 provided in the movable body 40 in the housing 10.

  The body 20 is integrally formed with a cylindrical connector portion 22 surrounded by a peripheral wall. On the inner bottom surface of the connector portion 22, the tips of the plurality of conductors 20d protrude and are arranged in a plurality of rows, thereby forming connector terminals (not shown).

  As shown in FIG. 3, when the movable body 40 in the housing 10 rotates about the shaft portion 42, the pair of parallel fixed contacts 20 c and the movable contact 47 in contact with each other contract the coil spring 46 by elastic deformation. While sliding on the curved surface at one end of the rib 20e, the rib 20e is separated from the fixed contact 20c. When the movable contact 47 comes to the other end of the rib 20e while sliding on the upper surface of the rib 20e, the movable contact 47 descends to another pair of fixed contacts 20c while sliding on the curved surface by the elastic restoring force of the coil spring 46. . In this way, the movable contact 47 held by the movable body 40 selectively contacts and separates from each fixed contact 20 c according to the rotational position of the movable body 40 with respect to the housing 10. As a result, a position signal corresponding to the shift position of the automatic transmission is taken out via the mating connector connected to the connector portion 22.

  As shown in FIGS. 1 and 2, substantially mountain-shaped flanges 23 and 23 are integrally formed on both sides of the main part of the fan in the body 20. A cylindrical reinforcing member 23b through which an oval bolt insertion hole 23a through which a bolt for attaching the housing 10 to the vehicle body (or automatic transmission) is inserted is insert-molded in the flange portion 23, respectively.

  The cover 30 is formed in a flat and substantially fan shape that covers the opening of the body 20. And the bearing part by which the bearing hole 31a by which the other end side (upper side of the cylinder part 43 of FIG. 1) of the axial part 42 of the movable body 40 was penetrated was penetrated in the part corresponded in the center of a fan. 31 is formed.

  In the present embodiment, the bearing portion 31 includes a cylindrical tube portion 32. The tube portion 32 includes a side wall portion 32a and a bottom wall portion 32b in which a circular insertion hole 32c is formed in the center portion. It is configured. Thus, in this embodiment, the bearing hole 31a is formed by the insertion hole 32c and the insertion hole 32d that is formed inside the side wall portion 32a and has a larger diameter than the insertion hole 32c.

  Further, the fan portion of the cover 30 is an upper step portion 33a whose central portion is one step higher than the peripheral portion, and a step portion 33 is formed by the upper step portion 33a and the lower step portion 33b around the upper step portion 33a. . And as shown in FIG. 10, the accommodation space S in which the other end side (upper side of FIG. 1) of the main body 41 of the movable body 40 is rotatably accommodated is formed inside the upper stage portion 33a.

  Therefore, when the other end side of the shaft portion 42 of the movable body 40 (the upper side of the cylinder portion 43 in FIG. 1) is inserted into the bearing hole 31a, the other end surface (upper surface in FIG. 1) of the flange portion 44 is the bottom wall portion. The shaft portion 42 of the movable body 40 is pivotally supported by the cover 30 so as to be slidably contacted with one end surface (the lower surface in FIG. 1) of 32 b.

  Further, in a state where the shaft portion 42 of the movable body 40 is inserted through the bearing portion 31 of the cover 30 (housing 10), a press-fit portion (attachment portion) 60 for press-fitting (attaching) the oil seal 50 is formed. Become.

  Specifically, the press-fitting portion (attachment portion) 60 includes an inner surface 32e of the side wall portion 32a, an inner bottom surface (upper surface in FIG. 1) 32f of the bottom wall portion 32b, and an outer surface 43a of the cylindrical portion 43 at the other end ( The upper end of FIG. 1 is formed so as to open.

  The annular oil seal 50 is press-fitted and attached to the press-fit portion (attachment portion) 60 from the other end side (the upper side in FIG. 1), thereby improving the sealing performance of the housing 10 in the bearing portion 31. Airtightness is maintained.

  The automatic transmission control switch 1 having such a configuration is assembled as follows, for example.

  First, the shaft portion 42 of the movable body 40 is inserted into the bearing portion 31 of the cover 30 (housing 10). Thus, the shaft portion 42 of the movable body 40 is pivotally supported on the cover 30, and the other end side (upper side in FIG. 1) of the main body 41 of the movable body 40 is rotatably accommodated in the accommodation space S.

  Next, the oil seal 50 is press-fitted (attached) into a press-fit part (attachment part) 60 formed in a state where the shaft part 42 of the movable body 40 is inserted into the bearing part 31 of the cover 30 (housing 10). The sealing performance of the housing 10 at 31 is improved.

  Then, the movable body 40 to which the coil spring 46 and the movable contact 47 are attached is mounted on the inner bottom surface 20 b of the body 20. In this state, the body 20 and the cover 30 are joined to each other to form the housing 10 by ultrasonic welding of the peripheral portion 20a of the body 20 and the peripheral portion 30a of the cover 30. At this time, a groove may be formed in the peripheral edge portion 20a of the body 20 or the peripheral edge portion 30a of the cover 30 and a packing may be arranged in the groove to further improve the sealing performance.

  Then, the shaft 70 (see FIG. 5) is press-fitted into the press-fitting hole 43b of the movable body 40 via a protective plate (not shown), and the nut is tightened on the bolt inserted into the bolt insertion hole 23a of the reinforcing member 23b. The housing 10 is attached to the vehicle body (or automatic transmission).

  By doing so, the shaft 70 and the movable body 40 are integrally rotated by the switching operation of the shift lever of the automatic transmission, and each position signal is taken out according to the rotation position of the movable body 40 with respect to the housing 10. Will be able to. At this time, the secret of the housing 10 is held by the oil seal 50 or the like.

  Here, in the present embodiment, a fixing portion 61 that fixes the oil seal 50 is provided in the press-fitting portion (attachment portion) 60.

  Specifically, a through-hole 32g (fixing portion 61) that locks a part of the oil seal 50 is formed in a portion constituting the press-fitting portion (attachment portion) 60 of the cover 30.

  In the present embodiment, the through hole 32g includes a boundary line (intersection line) L between the inner side surface 32e of the side wall portion 32a and the inner bottom surface (upper surface in FIG. 1) 32f of the bottom wall portion 32b, as shown in FIG. It is formed at the site.

  Specifically, as shown in FIGS. 7 and 8, the through hole 32g is formed on the outer peripheral side (boundary line L side) of the inner bottom surface (upper surface in FIG. 1) 32f so as to have an arc shape in plan view. It is formed so as to penetrate in the axial direction. The through hole 32g is formed on one end side of the inner side surface 32e (lower side in FIG. 1: the boundary line L side) so as to be rectangular in a side view, and is formed so as to penetrate in the radial direction. ing. And the one through-hole 32g is formed in the press-fit part (attachment part) 60 by forming so that the through-hole of an axial direction and the through-hole of radial direction may connect. That is, the through hole 32g is formed so as to penetrate the region including the boundary line L in an oblique direction (direction intersecting the axial direction: one axial end side and the radially outer side).

  Furthermore, in the present embodiment, the through hole 32g is formed so as to communicate with the accommodation space S, and the press-fit portion (attachment portion) 60 is prevented from communicating with the outside through the through hole 32g.

  On the other hand, the oil seal 50 is formed of an elastic body such as rubber, and has a substantially H-shaped cross section as shown in FIG. Specifically, the oil seal 50 includes an annular central support portion 51 formed in the central portion, and a cylindrical inner piece 52 continuously provided on the inner side (radially inner side) of the central support portion 51, And a cylindrical outer piece 53 continuously provided on the outer side (radially outer side) of the central support portion 51.

  When the oil seal 50 is press-fitted (attached) into the press-fit portion (attachment portion) 60 and moved to one end side in the axial direction (lower side in FIG. 1), one end of the outer piece 53 (lower end in FIG. 8). However, the bearing portion 31 is sealed around the bearing portion 31 by the oil seal 50.

  At this time, the through-hole 32g is formed in the region including the boundary line L so as to penetrate in an oblique direction (direction intersecting the axial direction: one axial end side and the radially outer side). Therefore, when the oil seal 50 is pushed toward one end in the axial direction, a component force acting radially outward is generated at one end of the outer piece 53 (lower end in FIG. 8) in the vicinity of the through hole 32g. Then, by this component force, one end (the lower end in FIG. 8) of the outer piece 53 is pushed into the through hole 32g and is locked to the through hole 32g.

  In this way, if the through hole 32g is formed so as to penetrate in the oblique direction, one end (the lower end in FIG. 8) of the outer piece 53 can be easily inserted into the through hole simply by pushing the oil seal 50 toward one end in the axial direction. It can be locked to 32g.

  By the way, when the fixing part 61 is not provided in the press-fitting part 60, the dimension is not stable due to a molding error of the cover 30 or a draft by molding using a mold, and the oil seal 50 is not uniformly held, There was a risk that the oil seal 50 would move. In particular, when the shape shown in FIG. 10 is formed over the entire circumference of the bearing portion 31, the oil seal 50 comes out of the press-fit portion 60, and the sealing performance of the housing 10 in the bearing portion 31 is reduced. There was a risk of it.

  However, in the present embodiment, a fixing portion 61 that fixes the oil seal 50 is provided in the press-fitting portion (attachment portion) 60. Therefore, the oil seal 50 press-fitted (attached) into the press-fit portion (attachment portion) 60 can be prevented from coming off from the press-fit portion (attachment portion) 60, and the sealing performance of the housing 10 at the bearing portion 31 can be suppressed. Can be suppressed.

  As described above, in the present embodiment, the oil seal 50 is attached to the press-fit portion (mounting portion) 60 formed in a state where the shaft portion 42 of the movable body 40 is inserted into the bearing portion 31 of the cover 30 (housing 10). A through hole 32g (fixing portion 61) to be fixed is provided. In this way, by fixing the oil seal 50 to the through hole 32g (fixing portion 61), it is possible to suppress the oil seal 50 press-fitted (attached) to the press-fitting portion (attachment portion) 60 from moving. become able to.

  Therefore, it is not necessary to increase the roundness of the bearing portion 31 in order to prevent the sealing performance of the housing 10 in the bearing portion 31 from being deteriorated. That is, it is not necessary to increase the processing accuracy of the cover 30. As a result, the automatic transmission control switch 1 that can be easily manufactured while improving the sealing performance of the housing 10 in the bearing portion 31 can be obtained.

  Further, in the present embodiment, a through hole 32 g as a fixing portion 61 that locks a part of the oil seal 50 is formed in a portion constituting the press-fitting portion (attachment portion) 60 of the cover 30. Therefore, the press-fitted state of the oil seal 50 and the locked state to the through hole 32g can be visually observed from the back side (the accommodation space S side). As a result, the oil seal 50 can be more securely press-fitted and locked to the through hole 32g.

  8 shows a state in which the main body 41 of the movable body 40 is located at a site where the through hole 32g is formed. However, the main body 41 is rotatably accommodated in the accommodation space S. Therefore, if the main body 41 is rotated so that the through-hole 32g and the main body 41 (side surface 45c of the stepped portion 45) do not overlap in the radial direction, the press-fit state of the oil seal 50 and the relationship to the through-hole 32g. The stopped state can be visually observed from the back side (the accommodation space S side). That is, when the main body 41 is rotated within a rotatable range in the accommodation space S, the through hole 32g and the main body 41 are positioned so as not to overlap in the radial direction at any position. It is preferable to form the hole 32g.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiments, and various modifications can be made.

  For example, in the above embodiment, the fixing portion 61 is exemplified as the through hole 32g. However, as shown in FIG. 11, the fixing portion 61 may be the recess 32gA. Even with this configuration, it is possible to achieve substantially the same operations and effects as in the above embodiment.

  Moreover, in the said embodiment, although what joined the peripheral part of the body and the peripheral part of the cover by ultrasonic welding was illustrated, you may make it join using an adhesive agent.

  Moreover, the fixing | fixed part (through hole and recessed part) may be formed in two or more places. In this case, only one of the through hole and the recess may be formed at a plurality of locations, or at least one through hole and one recess may be formed.

  Moreover, you may make it form a fixing | fixed part in the axial part of a movable body.

  In addition, specifications (shape, size, layout, etc.) of the body, the cover, the press-fitting hole of the movable body and other details can be changed as appropriate.

DESCRIPTION OF SYMBOLS 1 Control switch for automatic transmissions 10 Housing 20c Fixed contact 30 Cover 31 Bearing part 31a Bearing hole 32g Through-hole 32gA Concave part 40 Movable body 42 Shaft part 47 Movable contact 50 Oil seal 60 Press-fit part (attachment part)
61 Fixed part

Claims (5)

A movable body that rotates in the housing in response to a switching operation of a shift lever of an automatic transmission is provided. A control switch for an automatic transmission that outputs a position signal indicating a shift position of an automatic transmission corresponding to a combination of a movable contact and a fixed contact that is provided in the housing,
A housing having a bearing portion in which a shaft hole of the movable body is inserted and a bearing hole pivotally supported is formed;
An oil seal attached to an attachment portion formed in a state where the shaft portion of the movable body is inserted into the bearing portion of the housing;
With
The bearing part includes a side wall part and a bottom wall part connected to the side wall part,
A fixing portion having a hole into which the oil seal is pushed and fixed is provided on the housing side of the mounting portion, and the fixing portion is a boundary line between the side wall portion and the bottom wall portion in the bearing portion. A control switch for an automatic transmission, characterized in that it is formed in a part including 2. The control switch for an automatic transmission according to claim 1, wherein the fixing portion is a recess or a through hole that locks a part of the oil seal. The oil seal includes a support portion located at a center portion in a state of being attached to the attachment portion, an inner piece continuously provided on the inner side of the support portion, and an outer piece continuously provided on the outer side of the support portion. , And
3. The automatic transmission control switch according to claim 1, wherein one end of the outer piece of the oil seal is fixed to the hole of the fixing portion. 4. A movable body that rotates in the housing in response to a switching operation of a shift lever of an automatic transmission is provided. The movable body is provided with a movable contact, and a plurality of contacts with or apart from the movable contact according to the rotational position of the movable body A control switch for an automatic transmission that outputs a position signal indicating a shift position of an automatic transmission corresponding to a combination of a movable contact and a fixed contact that is provided in the housing,
A housing having a bearing portion in which a shaft hole of the movable body is inserted and a bearing hole pivotally supported is formed;
An oil seal attached to an attachment portion formed in a state where the shaft portion of the movable body is inserted through the bearing portion of the housing;
With
The oil seal includes a support portion located at a center portion in a state of being attached to the attachment portion, an inner piece continuously provided on the inner side of the support portion, and an outer piece continuously provided on the outer side of the support portion. , And
An automatic transmission control, wherein a fixing portion having a hole into which the oil seal is pushed and one end of the outer piece is fixed is provided on the housing side of the mounting portion. switch. The control switch for an automatic transmission according to claim 4, wherein the fixing portion is a recess or a through hole that locks a part of the oil seal.

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