WO2021181870A1

WO2021181870A1 - Side stand switch and side stand device

Info

Publication number: WO2021181870A1
Application number: PCT/JP2021/001323
Authority: WO
Inventors: 荒内　進; 信士菊池; 阿部　英樹
Original assignee: アルプスアルパイン株式会社
Priority date: 2020-03-12
Filing date: 2021-01-15
Publication date: 2021-09-16
Also published as: JP2023043896A

Abstract

Provided is a side stand switch that makes it possible to appropriately retain a sealing member without excessively increasing manufacturing burden. The side stand switch comprises: a rotor unit including a rotating body that rotates in coordination with a side stand; a case portion including a through hole through which the rotating body is inserted; and a sealing member including a tubular body composed of a stiff member extending in a rotational axis direction of the rotating body and a sealing portion composed of an elastic member and fixed to the tubular body. The sealing member is disposed by press-fitting between the rotating body and the through hole. The sealing portion is provided with: a first elastic portion that is formed with a uniform thickness on an outer side of the tubular body and is press-fit to an inner peripheral face of the through hole; and a second elastic portion that is provided on an inner side of the tubular body and slidably faces an outer peripheral face of the rotating body. The inner peripheral face of the through hole includes, in a position facing the tubular body, an airtight portion and a retainment portion that is positioned inner than the airtight portion in the case portion. The first elastic portion arranged to face the airtight portion is compressed in an air-tight manner. The through hole increases in diameter in the retainment portion.

Description

Side stand switch and side stand device

The present invention relates to a side stand switch and a side stand device, and more particularly to a side stand switch and a side stand device that detect the position of a side stand bar that supports a two-wheeled vehicle such as a motorcycle.

Generally, motorcycles and the like are provided with a side stand device that supports the vehicle body in an upright position when parked. This side stand device is configured by rotatably attaching a side stand bar to a bracket provided on a vehicle body frame via a pivot bolt and attaching a side stand switch to the pivot bolt via a fixing bolt. The side stand switch has a case portion provided with fixed contacts and a rotor portion provided with movable contacts, and the rotor portion is rotated together with the side stand bar to detect the rotation position of the side stand bar. There is.

Conventionally, as a side stand switch for detecting the position of a side stand bar, a side stand switch having a rotor portion engaged with the side stand bar via a pin and receiving a torque generated by tightening the fastening member is known (for example, a patent). Reference 1). As shown in FIG. 8, in the side stand switch 101, the case portion 108 is restricted from rotating by the regulating pin 107 protruding from the bracket, and the engaging pin 111 protruding from the rotor main body 109 is formed on the side stand bar 103. It is engaged with the hole 93. In this state, the side stand switch 101 is fixed to the pivot bolt 104 by tightening the fixing bolt 106 inserted through the central opening of the case portion 108 and the rotor main body 109 into the screw hole 112 of the head of the pivot bolt 104. Then, when the side stand bar 103 rotates, the rotor main body 109 rotates via the engaging pin 111, and the rotation position of the side stand bar 103 is detected.

A torque receiving member 110 that is frictionally engaged with the rotor body 109 is provided between the rotor body 109 and the fixing bolt 106 so that the rotor body 109 can rotate relative to each other. Further, the frictional force of the engaging surface of the torque receiving member 110 with the rotor main body 109 is smaller than the frictional force generated by tightening the fixing bolt 106. With this configuration, the rotor body 109 and the torque receiving member 110 rotate relative to each other only when a certain amount of torque or more is transmitted to the rotor body 109.

As described above, since the side stand switch 101 is finally fixed to the pivot bolt 104 by tightening the fixing bolt 106 to the screw hole 112, the fixing bolt 106 is not attached in the state of distribution and storage. Therefore, the seal member 120 located between the case portion 108 and the rotor main body 109 is properly regulated to come off (move to the Z1 side in the Z1-Z2 direction) even when the fixing bolt 106 is not attached. It is necessary.

In particular, in the side stand switch 101 disclosed in Patent Document 1, a seal member 130 is further provided on the Z2 side in the Z1-Z2 direction, and the seal member 130 is pulled out by a caulking portion 131 provided on the case portion. Movement in the Z1-Z2 direction to the Z2 side) is completely regulated. Therefore, when the environmental temperature in distribution and storage is high, the volume of the closed space (airtight space) formed between the case portion 108 and the rotor main body 109 and the two sealing

members

120 and 130 expands. An external force in the pulling direction (Z1-Z2 direction Z1 side) is likely to be applied to the sealing member 120 whose pulling is not regulated.

In the seal member according to the prior art, for example, as shown in FIG. 5 of Patent Document 2, a protruding portion is partially provided in the elastically deformable seal portion, and a groove is provided on the housing side with which the seal member abuts, and the protruding portion is provided. Was fitted into the groove to prevent it from coming off.

Japanese Unexamined Patent Publication No. 2010-274902 Japanese Patent No. 4082035

However, in the structure disclosed in Patent Document 2, when the seal member is inserted into the housing, the protruding portion passes through the portion on the front side of the groove and then reaches the groove, so that the protruding portion passes through this front portion. It is necessary to be able to do it. As a result of securing the amount of elastic deformation for ensuring the insertability of the protruding portion in the front portion, the amount of elastic compression of the protruding portion in the groove portion is reduced. This causes a decrease in airtightness. Further, if the protruding portion is not securely fitted in the groove portion, the elastic recovery force of the protruding portion becomes a pulling force of the seal member from the housing. Therefore, it is necessary to strictly control the fit between the groove and the protrusion. Furthermore, forming a groove in the housing requires additional machining in the case of machining, and it is necessary to prepare a die with a nested structure in the case of molding, both of which are easy to manufacture and stable to manufacture. It becomes a factor of decrease.

An object of the present invention is to provide a side stand switch and a side stand device that can appropriately prevent the sealing member from coming off without excessively increasing the manufacturing load.

The side stand switch according to one aspect of the present invention provided to solve the above problems has a rotor portion having a rotating body that rotates in conjunction with the side stand, a case portion having a through hole through which the rotating body is inserted, and a rotating body. A sealing member having a cylindrical body made of a rigid member extending in the direction of the rotation axis of the body, a sealing part made of an elastic member fixed to the cylindrical body, and a position detecting part for detecting the rotation position of the rotating body. , A side stand switch in which the sealing member is press-fitted between the rotating body and the through hole, and the sealing portion is formed to have a thickness equal to the outside of the cylindrical body and is formed on the inner peripheral surface of the through hole. A first elastic portion that is in pressure contact with the cylinder and a second elastic portion that is provided inside the cylindrical body and is slidably opposed to the outer peripheral surface of the rotating body, and the inner peripheral surface of the through hole is a cylinder. The first elastic portion, which has an airtight portion and a retaining portion located inside the case portion rather than the airtight portion at a position facing the airtight portion, is compressed so as to be airtight. The through hole expands in diameter at the retaining portion.

When a retaining portion with a partially expanded diameter is provided on the outer peripheral surface of the seal member (when a convex retaining portion is provided), when the sealing member is press-fitted into the through hole, the diameter of the portion having the retaining portion is expanded. It is further compressed in the radial direction by the amount, and the part without the retaining portion tries to expand by the amount compressed.

On the other hand, in the structure of the side stand switch according to this aspect, since the thickness of the first elastic portion is the same, the first elastic portion facing the airtight portion is uniformly compressed. Therefore, the degree of airtightness brought about by the compression of the first elastic portion becomes uniform in the circumferential direction of the through hole, and the stability of the airtightness can be improved. Further, as compared with the case where the seal member is partially expanded in diameter to serve as a retaining portion, the seal member can be easily press-fitted and the degree of airtightness can be easily increased. The enlarged diameter part of the seal part not only becomes an obstacle during press fitting, but as a result of giving priority to allowing this enlarged diameter part to pass through the airtight part, the press-fitting clearance of the airtight part becomes relatively large, and the degree of airtightness increases. It will decrease relatively. Further, if a diameter-expanded portion is provided in the through hole corresponding to the diameter-expanded portion of the seal member, it is necessary to sufficiently manage these fittings so that the airtightness is not affected after press fitting.

Since the through hole has an enlarged diameter at the retaining portion located on the tip side in the press-fitting direction, the first elastic portion that has been press-fitted and passed through the airtight portion is press-welded to the through hole in a relatively expanded state at the retaining portion. do. Therefore, when an external force is generated in the direction of removing (pulling out) the seal member in the rotation axis direction after press-fitting, the through hole is reduced in diameter in the direction in which the seal member is removed, so that the seal member is pressed against the retaining portion in the first elastic portion. Unless the portion is further compressed, the sealing member does not move in the direction in which it actually comes off. That is, the compressive resistance of the portion of the first elastic portion that comes into pressure contact with the retaining portion functions as the resistance force of the external force. Therefore, in the side stand switch according to this embodiment, the seal member is difficult to come off even if an external force is generated. Further, since the shape provided on the through hole side of the case portion is easier to process than, for example, the groove portion of Patent Document 2, the ease of manufacture is unlikely to decrease.

In the above side stand switch, it is preferable that the enlarged diameter width D of the through hole in the retaining portion satisfies the following formula (1).
D ≧ T × 0.005 (1)
Here, T is the clearance between the through hole and the tubular body in the airtight portion.

The enlarged diameter width D means the width in which the radius of the through hole is widened in the direction orthogonal to the rotation axis direction in the cross section on the surface including the rotation axis. Therefore, the width of the first elastic portion that presses against the inner surface of the through hole in the retaining portion, that is, the clearance T1 between the through hole and the tubular body in the retaining portion is the clearance between the through hole and the tubular body in the airtight portion. It is expressed by the following equation (2) using T and the enlarged diameter width D.
T1 = D + T (2)
It is represented by.
If the clearance T1 is 0.5% or more larger than the clearance T, the compression resistance generated when the first elastic portion located in the retaining portion moves to the airtight portion side becomes sufficiently high and functions appropriately as a retaining portion. ..

It is preferable that the above-mentioned side stand switch is provided with a retaining portion over the entire circumference of the through hole. Since the retaining portion is provided over the entire circumference direction, the retaining function can be enhanced without increasing the diameter expansion width D. The retaining portions may be partially provided at equal intervals in the circumferential direction over the entire circumference of the through hole.

The above side stand switch preferably further has a transition portion in which the diameter of the through hole changes between the airtight portion and the retaining portion. In this case, the length L of the transition portion in the rotation axis direction is L. Is preferably not more than twice the enlarged diameter D of the through hole.

Since the length L of the transition portion is less than twice the diameter expansion width D, when a pulling force is applied to the sealing member, the compression resistance of the elastic member is quickly generated, and the retaining function is appropriately exhibited. The shorter the length L of the transition portion, the more efficiently the compression resistance can be increased. However, from the viewpoint of improving the workability (molding workability, cutting workability) of the through hole of the case portion, the length of the transition portion is In some cases, it is preferable that L is up to about ½ of the enlarged diameter width D. In some cases, it is preferable that the transition portion is composed of a tapered portion in which the diameter of the through hole continuously changes from the viewpoint of ease of forming the transition portion.

The above side stand switch may further include a fixed seal member that is airtightly pressure-welded to the through hole at a position separated from the seal member along the rotation axis direction. In this case, it is preferable that the case portion is provided with a support member that regulates the movement of the fixed seal member away from the seal member along the rotation axis direction. Even if the pressure in the airtight space rises, the portion of the first elastic portion facing the retaining portion can be elastically deformed preferentially, so that the pressure in the airtight space is suppressed from being excessively increased.

The side stand device of the present invention includes a side stand bar that supports the vehicle body in an upright state, a bracket, a pivot bolt that rotatably attaches the side stand bar to the bracket, and a side stand switch according to the above aspect of the present invention. A fixing bolt for attaching the side stand switch to the pivot bolt by tightening is provided.

According to the present invention, there is provided a side stand switch capable of appropriately preventing the seal member from coming off without excessively increasing the manufacturing load, and a side stand device including the side stand switch.

It is a perspective view which shows the embodiment of the side stand device provided with the side stand switch which concerns on one Embodiment of this invention. It is an exploded perspective view which shows the Embodiment of the side stand apparatus provided with the side stand switch which concerns on one Embodiment of this invention. It is a partial cross-sectional view which shows the embodiment of the side stand switch which concerns on one Embodiment of this invention. It is a partially enlarged view of FIG. It is a figure which shows the state before mounting of the side stand switch which concerns on one Embodiment of this invention. (A) is a conceptual diagram for explaining the function of the side stand switch according to the embodiment of the present invention, and (b) is a partially enlarged view of FIG. 6 (a). It is a partial cross-sectional view explaining the structure of the through hole of the case part of the side stand switch which concerns on another Embodiment of this invention. It is a partial cross-sectional view of the side stand device provided with the conventional side stand switch.

Hereinafter, embodiments of the stand position detection device of the present invention will be described with reference to the attached drawings. The same members are given the same numbers in each drawing, and the description thereof will be omitted as appropriate. First, the overall configuration of the side stand device 1 will be described with reference to FIGS. 1 and 2. FIG. 1 is a perspective view of a side stand device 1 provided with a side stand switch 5 according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of the side stand device 1 according to the embodiment of the present invention.

As shown in FIGS. 1 and 2, the side stand device 1 supports the motorcycle in an upright state when parked, and has a bracket 2 provided on a vehicle body frame (not shown) and a pivot bolt 4 on the bracket 2. It is configured to include a side stand bar 3 that is rotatably attached, that is, rotatably attached within a predetermined range. Further, in the side stand device 1, a side stand switch 5 is provided on the pivot bolt 4 via a fixing bolt 6, and the position of the side stand bar 3 is detected by the side stand switch 5.

The bracket 2 is configured to have a plate-shaped portion 11 and a through pin 12 that penetrates the plate-shaped portion 11 in the thickness direction and is fixed. The plate-shaped portion 11 is formed with a shaft hole 13 penetrating in the thickness direction (Z1-Z2 direction) at the mounting position of the side stand bar 3. One end side of the through pin 12 (Z1 side in the Z1-Z2 direction) functions as a positioning pin for positioning the side stand switch 5, and the other end side of the through pin 12 (Z2 side in the Z1-Z2 direction) is a return spring (not shown). It functions as a locking pin that is locked to the return spring).

The side stand bar 3 is attached to the bracket 2 by a pivot bolt 4, and is configured to be rotatable between an upright position where the pivot bolt 4 is in contact with the ground and a storage position which is substantially horizontal to the ground. .. A pair of bifurcated connecting

portions

15 and 16 are provided on the base end side of the side stand bar 3 so as to sandwich the plate-shaped portion 11, and a shaft hole is provided so as to penetrate the pair of connecting

portions

15 and 16. 17 and 18 are formed. In the vicinity of the shaft hole 17 of one of the connecting portions 15, an engaging hole 19 that engages with the rotor portion 32 of the side stand switch 5 is formed through.

The pivot bolt 4 is inserted into the shaft holes 17 and 18 of the pair of connecting

portions

15 and 16 and the shaft hole 13 of the bracket 2 with the bracket 2 sandwiched between the pair of connecting

portions

15 and 16. At this time, the intermediate portion 23 of the pivot bolt 4 is inserted into the shaft hole 17 of the connecting portion 15 on one side (Z1 side in the Z1-Z2 direction) and the shaft hole 13 of the bracket 2, and the screw portion 24 on the tip side is inserted into the other (Z1-Z2 direction Z1 side). It is inserted into the shaft hole 18 of the connecting portion 16 (on the Z2 side in the Z1-Z2 direction), and a part of the connecting portion 16 is exposed to the outside.

The pivot bolt 4 is fixed to the pair of connecting

portions

15 and 16 by screwing the fixing nut 7 into the exposed screw portion 24 and tightening the fixing nut 7. As a result, the side stand bar 3 is integrally moved with the pivot bolt 4 so as to rotate with respect to the bracket 2. Further, the head 21 of the pivot bolt 4 is formed with a screw hole 22 into which the fixing bolt 6 is screwed.

The side stand switch 5 detects whether the side stand bar 3 is located on the upright position side or the storage position side, and the fixing bolt 6 is in a state where one end side of the through pin 12 is sandwiched by the holding portion 34 described later. Is attached to the head 21 of the pivot bolt 4. A holding portion 34 and a coupler portion 35 are formed in the case portion 31 of the side stand switch 5. The side stand switch 5 is positioned by sandwiching one end side (Z1 side in the Z1-Z2 direction) of the through pin 12 with the holding portion 34, and a signal corresponding to the position of the side stand bar 3 is output from the coupler portion 35. The detailed configuration of the side stand switch 5 will be described later.

The side stand switch 5 is fixed to the pivot bolt 4 by inserting the side stand switch 5 and tightening the fixing bolt 6 in a state of being screwed into the screw hole 22 of the pivot bolt 4. The fixing bolt 6 has a circular flange portion 27 on the head, and the flange portion 27 protects the annular sealing member 41 (see FIG. 3 and the like) from flying stones and the like, and stably presses the side stand switch 5. ing.

Next, the detailed configuration of the side stand switch 5 will be described with reference to FIGS. 3 and 4. FIG. 3 is a partial cross-sectional view showing an embodiment of the side stand switch 5 according to the present invention. FIG. 4 is an enlarged view of a portion where the seal member of FIG. 3 is located.

As shown in FIG. 3, the side stand switch 5 includes a case portion 31 whose rotation is restricted by a through pin 12, and a rotor portion 32 housed inside the case portion 31 in a rotatable state. Has been done. The case portion 31 is formed of a synthetic resin or the like, and the surface (lower surface, hereinafter, the case portion 31 of the case portion 31 on the bracket 2 side (Z1-Z2 direction Z2 side) is on the lower side and the opposite side of the bracket 2 is on the upper side. It is composed of a case main portion 33 in which the case main portion 33 is opened, and the above-mentioned holding portion 34 (see FIGS. 1 and 2) provided on the side of the case main portion 33.

The case main portion 33 has a through hole 200, and a circular opening 37 is formed in the upper wall of the through hole 200 (the wall on the Z1 side in the Z1-Z2 direction). The circular opening 37 is provided with a ring-shaped sealing member 41 that seals the gap between the case main portion 33 and the rotor portion 32. Further, in the lower part (Z2 side in the Z1-Z2 direction) of the through hole 200 of the case main part 33, a ring shape that seals a gap between the lower part of the rotor part 32 (Z2 side in the Z1-Z2 direction) and the case main part 33. The fixed seal member 42 of the above is provided. The case portion 31 has a caulking portion 311 projecting toward the rotation shaft side at its lower end (Z1-Z2 direction Z2 side end), and the fixed seal member 42 is moved downward (Z1-Z2 direction Z2 side) by the caulking portion 311. Movement is restricted. That is, the side stand switch 5 is provided with a reliable retaining mechanism for the fixed seal member 42.

A fixed contact 43 is provided around the circular opening 37 on the upper wall of the case main portion 33, and the fixed contact 43 is exposed inside the case main portion 33. Further, although not shown in detail, in the present embodiment, the fixed contact 43 is configured by arranging an arc-shaped common fixed contact and two individual fixed contacts on the same circumference. For example, when the side stand bar 3 is in the storage position, the common fixed contact and one of the individual fixed contacts are electrically connected by the movable contact 54 described later, and when the side stand bar 3 is in the upright position, the movable contact described later is provided. The common fixed contact and the other individual fixed contact are made conductive by 54. With such a configuration, the runnable state of the motorcycle and the parked state of the motorcycle are detected. By making it possible to detect the state of the side stun bar 3, for example, it is used for vehicle body control such that the side stand bar 3 cannot travel while standing.

The rotor portion 32 includes a rotating body (rotor body 51) that is rotatably supported with respect to the case portion 31, and a torque receiving member 52 that is frictionally engaged with an insertion hole 56 in the central portion of the rotor body 51. Has been done. The rotor body 51 is formed of a synthetic resin such as polybutylene terephthalate (PBT) except for the torque receiving member 52 and the engaging pin 63, and has a cylindrical insertion hole 56 penetrating in the rotation axis direction in the central portion. It has a shaped disk portion 57, an annular upper shaft portion 58 projecting upward from the opening edge portion of the disk portion 57, and an annular lower shaft portion 59 projecting downward on the outer peripheral side of the disk portion 57. ..

A movable contact 54 formed in a semicircular shape is provided on the upper surface of the disk portion 57. The movable contact 54 is configured to be rotatable together with the rotor main body 51 in a state of being urged toward the fixed contact 43 by a coil spring 53 from the back surface.

The upper shaft portion 58 is formed in a hollow cylindrical shape and is rotatably supported by the seal member 41. The head portion 21 of the pivot bolt 4 is housed inside the lower shaft portion 59, and is rotatably supported by the fixed seal member 42. In this way, the rotor main body 51 is rotatably supported by the seal member 41 and the fixed seal member 42 on both the upper and lower ends, so that the rotor body 51 is stably held in the case portion 31. That is, the seal member 41 and the fixed seal member 42 are press-fitted between the upper shaft portion 58 and the lower shaft portion 59 and the rotor main body 51, and the rotor main body 51 is pressed by the elastic force of the seal member 41 and the fixed seal member 42. It is held without falling out of the case portion 31. As described above, when the side stand switch 5 is attached to the motorcycle, the sealing member 41 is restricted from moving upward (Z1 side in the Z1-Z2 direction) by the flange portion 27 of the fixing bolt 6. A caulking portion 311 is provided on the fixed seal member 42 to prevent the fixed seal member 42 from falling off. However, the seal member 41 is not provided with the same fall-off prevention structure as the crimped portion 311. This is because the upper surface of the seal member 41 is pressed by the flange portion 27 of the fixing bolt 6 as described above. If the same fall prevention structure as the caulking portion 311 is provided, the fixing bolt 6 may be attached at an angle, or the fall prevention structure may be damaged by tightening to cause another problem.

Further, the lower shaft portion 59 is formed with an engaging pin 63 protruding downward (Z2 side in the Z1-Z2 direction) from the lower end surface (Z2 side end surface in the Z1-Z2 direction), and the engaging pin 63 is formed on the side stand bar 3. It is inserted into the formed engaging hole 19. With this configuration, the rotor body 51 is engaged with the side stand bar 3 via the engaging pin 63, and is rotated together with the side stand bar 3.

The torque receiving member 52 is formed in a hollow cylindrical shape by a metal such as carbon steel for machine structure (S45C). The central portion of the torque receiving member 52 is an insertion hole 71 through which the shaft portion of the fixing bolt 6 is inserted, and the fixing bolt 6 is screwed into the screw hole 22 of the pivot bolt 4 through the insertion hole 71. In this case, the upper end surface 81 (Z1-Z2 direction Z1 side end surface) of the torque receiving member 52 is in contact with the back surface of the flange portion 27 of the fixing bolt 6, and the lower end surface (Z1-Z2 direction Z2 side end surface) is the pivot bolt. It is in contact with the upper surface (Z1 side surface in the Z1-Z2 direction) of the head portion 21 of 4.

In the side stand device 1 configured in this way, when the motorcycle is running, the side stand bar 3 is pushed up by the driver, and the side stand bar 3 rotates from the standing position to the storage position with the pivot bolt 4 as the fulcrum. Will be done. At this time, the rotor main body 51 rotates via the engaging pin 63 together with the side stand bar 3, and the contact portion of the movable contact 54 provided on the rotor main body 51 is the common fixed contact of the fixed contact 43 and one individual fixed contact. To make it conductive. As a result, the side stand switch 5 detects that the side stand bar 3 is located at the storage position. As described above, in the side stand switch 5 according to the present embodiment, the position detecting unit includes the fixed contact 43 and the movable contact 54.

On the other hand, when the motorcycle is parked, the side stand bar 3 is pushed down by the driver, and the side stand bar 3 is rotated from the storage position to the upright position with the pivot bolt 4 as a fulcrum. At this time, the rotor main body 51 rotates via the engaging pin 63 together with the side stand bar 3, and the contact portion of the movable contact 54 provided on the rotor main body 51 is the common fixed contact of the fixed contact 43 and the other individual fixed contact. To make it conductive. As a result, the side stand switch 5 detects that the side stand bar 3 is located in the upright position.

As described above, in response to the rotation of the rotor body 51 that rotates in synchronization with the side stand bar 3, the fixed contact 43 is electrically connected to the state of being electrically connected via the movable contact 54. It switches from the state that is not in the state. That is, the side stand switch 5 detects whether the side stand bar 3 is in the retracted position or the standing position by switching the electrical connection state between the movable contact 54 and the fixed contact 43.

As shown in FIG. 4, the seal member 41 is fixed to the tubular body 210 made of a rigid member extending in the rotation axis direction (Z1-Z2 direction) of the rotor main body 51 which is a rotating body, and the tubular body 210. It has a sealing portion 220 made of an elastic member. The tubular body 210 extends outward from one end of the cylindrical cylindrical portion 212 and the cylindrical portion 212 extending in the rotation axis direction (Z1-Z2 direction), specifically, the end on the Z1 side in the Z1-Z2 direction. A flange portion 211 is provided. The cylindrical portion 212 functions as a support for the seal portion 220, and the flange portion 211 functions as a receiving portion for the fixing bolt 6 fastened to the pivot bolt 4 in the Z1-Z2 direction, and the tip portion of the flange portion 211 ( In FIG. 4, the tip on the X2 side in the X1-X2 direction) abuts on the case main portion 33 to function as a stopper in the rotation axis direction (Z1-Z2 direction).

The seal portion 220 is formed with a thickness T0 equal to the outer side of the cylindrical portion 212 of the tubular body 210, and has a first elastic portion 221 that presses against the inner peripheral surface of the through hole 200 of the case main portion 33, and the tubular body 210. A second elastic portion 222 that is provided inside the rotating body (rotor body 51) and is slidably opposed to the outer peripheral surface of the rotating body (rotor body 51) is provided. The second elastic portion 222 is extended in a fold shape in an oblique vertical direction. In FIG. 4, one fold extends to the Z1 side in the Z1-Z2 direction and the X1 side in the X1-X2 direction, and the other fold extends to the Z2 side in the Z1-Z2 direction and the X1 side in the X1-X2 direction. With such a configuration, the tip portion of the fold is pressed against the outer peripheral surface of the rotating body (rotor body 51) with a stronger force than the root portion. In FIG. 4, the root portion does not come into contact with the outer peripheral surface of the rotating body (rotor body 51). With such a configuration, it is possible to prevent foreign matter from entering the inside of the case portion 31 without hindering the rotation of the rotating body (rotor body 51). In the seal portion 220 according to the present embodiment, the first elastic portion 221 and the second elastic portion 222 are continuously provided on the Z2 side in the Z1-Z2 direction.

The inner peripheral surface of the through hole 200 of the case main portion 33 is located at a position facing the tubular body 210, inside the airtight portion 202 and inside the case main portion 33 (Z1 side in the Z1-Z2 direction) with respect to the airtight portion 202. It has a retaining portion 203 and a retaining portion 203. In other words, the retaining portion 203 starts from a position (Z1 side in the Z1-Z2 direction) above the position facing the tip portion (Z2 side end in the Z1-Z2 direction) of the cylindrical portion 212 on the inner peripheral surface of the through hole 200. It extends downward (Z2 side in the Z1-Z2 direction). Therefore, the first elastic portion 221 is arranged in a compressed state between the retaining portion 203 and the cylindrical portion 212.

The first elastic portion 221 arranged to face the airtight portion 202 is compressed so as to be airtight. Specifically, the first elastic portion 221 is compressed from the thickness T0 before compression to the clearance T between the through hole 200 and the tubular body 210 in the airtight portion 202. Therefore, of the internal space of the through hole 200, the space located inside the case main portion 33 (Z1 side in the Z1-Z2 direction) with respect to the first elastic portion 221 arranged to face the airtight portion 202 is the airtight space 201. ..

The through hole 200 has an enlarged diameter at the retaining portion 203 located on the tip side in the press-fitting direction (Z2 side in the Z1-Z2 direction). Therefore, the first elastic portion 221 that has been press-fitted and passed through the airtight portion 202 is pressed into the through hole 200 in a state of being relatively expanded by the retaining portion 203. Specifically, the widened diameter D of the first elastic portion 221 in the retaining portion 203 is the through hole 200 and the tubular shape in the airtight portion 202 of the clearance T1 between the through hole 200 in the retaining portion 203 and the tubular body 210. It is a difference (T1-T) with respect to the clearance T with the body 210.

Since the through hole 200 has a reduced diameter in the direction in which the seal member 41 comes out, when an external force is generated in the direction of removing (pulling out) the seal member 41 in the rotation axis direction (Z1-Z2 direction Z1 side) after press fitting. Unless the portion of the first elastic portion 221 that comes into pressure contact with the retaining portion 203 is further compressed, the seal member 41 does not move in the direction in which it actually comes out. That is, the compression resistance of the portion of the first elastic portion 221 that comes into pressure contact with the retaining portion 203 functions as a resistance force of an external force. Therefore, in the side stand switch 5 according to the present embodiment, the seal member 41 is difficult to come off even if an external force is generated.

FIG. 5 is a diagram showing a state before mounting the side stand switch according to the embodiment of the present invention. FIG. 6A is a conceptual diagram illustrating the function of the side stand switch according to the embodiment of the present invention. FIG. 6B is a partially enlarged view of FIG. 6A. As shown in FIG. 5, the fixing bolt 6 is not located on the Z1-Z2 direction Z1 side of the seal member 41 until the side stand switch 5 is attached to the motorcycle.

On the other hand, as shown in FIG. 6, the fixed seal member 42 is airtightly pressure-contacted with the through hole 200 at a position separated from the seal member 41 along the rotation axis direction (Z1-Z2 direction). Therefore, in the area surrounded by the broken line in FIG. 6A, specifically, the area surrounded by the seal member 41 and the fixed seal member 42 between the rotating body (rotor body 51) and the through hole 200. In addition, the airtight space 201 is formed.

Here, the fixed seal member 42 moves away from the seal member 41 along the rotation axis direction (Z1-Z2 direction) by the support member (caulking portion 311) provided on the case portion 31 (Z1-Z2 direction Z2). Movement to the side) is regulated. Therefore, if the environmental temperature rises and the temperature of the airtight space 201 rises during storage or transportation of the side stand switch 5 before being attached to the motorcycle, even if the pressure of the airtight space 201 rises, the fixed seal member 42 cannot move to the Z2 side in the Z1-Z2 direction.

On the other hand, as described above, in the side stand switch 5 before being attached to the motorcycle, the seal member 41 does not have an aggressive member (fastened fixing bolt 6) that regulates the movement in the Z1-Z2 direction to the Z1 side. .. Therefore, if some kind of retaining is not provided, the seal member 41 moves in the pulling direction (Z1-Z2 direction Z1 side) due to the pressure increase in the airtight space 201. However, in the side stand switch 5 according to the present embodiment, the portion of the first elastic portion 221 facing the retaining portion 203 has a relatively low degree of compression, and the portion of the first elastic portion 221 facing the airtight portion 202. There is room for compression to the same extent as. Therefore, when the pressure of the airtight space 201 rises, the portion of the first elastic portion 221 facing the retaining portion 203 is preferentially elastically deformed and the airtight space 201 expands, so that the pressure of the airtight space 201 becomes excessive. Expansion is suppressed. FIG. 6B shows a state in which the portion of the first elastic portion 221 facing the retaining portion 203 is elastically deformed preferentially, and the shape shown by the broken line in the figure increases the pressure in the airtight space 201. The outer shape of the front sealing member 41 on the Z1-Z2 direction Z2 side is shown. As shown in FIG. 6B, the portion 223 of the first elastic portion 221 facing the airtight space 201 is preferentially compressed.

It is preferable that the enlarged diameter width D of the through hole 200 in the retaining portion 203 satisfies the following formula (1).
D ≧ T × 0.005 (1)

As described above, the enlarged diameter width D is the through hole 200 in the direction orthogonal to the rotation axis direction (X1-X2 direction in FIG. 4) in the cross section (XZ plane in FIG. 4) including the rotation axis. The width with a wider radius. Therefore, the width of the first elastic portion 221 that is in pressure contact with the inner surface of the through hole 200 in the retaining portion 203, that is, the clearance T1 between the through hole 200 and the tubular body 210 (cylindrical portion 212) in the retaining portion 203 is airtight. It is represented by the following equation (2) using the clearance T between the through hole 200 and the tubular body 210 (cylindrical portion 212) in the portion 202 and the enlarged diameter width D.
T1 = D + T (2)
It is represented by.

If the clearance T1 is 0.5% or more larger than the clearance T, the compression resistance generated when the first elastic portion 221 located in the retaining portion 203 moves to the airtight portion 202 side becomes sufficiently high and is suitable as a retaining portion. Works for.
That is, it is preferable to satisfy the following formula (3).
T1 / T ≧ 1.005 (3)

From the above formula (2) and the above formula (3), the following formula (4) is obtained, and the above formula (1) is derived.
(D + T) / T = D / T + 1 ≧ 1.005 (4)

The clearance T uses a compression ratio P (75% to 85% is exemplified) determined based on the required degree of airtightness, the material constituting the first elastic portion 221 and the like, and the first elastic portion 221 is used. The thickness T0 before compression of 221 is set so as to satisfy the relationship of the following equation (5).
T = T0 × P (5)

In the side stand switch 5 according to the present embodiment, the shape of the case portion 31 provided on the through hole 200 side of the case main portion 33 is easier to process than, for example, the groove portion of Patent Document 2, so that the ease of manufacture is reduced. Hateful.

It is preferable that the retaining portion 203 is provided over the entire circumference of the through hole 200. Since the retaining portion 203 is provided over the entire circumferential direction, the retaining function can be enhanced without increasing the diameter expansion width D. The retaining portion 203 may be partially provided in the circumferential direction of the through hole 200. In this case, it is preferable that the retaining portions 203 are provided at equal intervals in the circumferential direction over the entire circumference of the through hole 200, because the retaining function can be made uniform.

FIG. 7 is a partial cross-sectional view illustrating the structure of the through hole of the case portion of the side stand switch according to another embodiment of the present invention. As shown in FIG. 7, a transition portion 204 in which the diameter of the through hole 200 changes is further provided between the airtight portion 202 and the retaining portion 203 from the viewpoint of shape processability of the through hole 200. Is preferable. In this case, the length L of the transition portion 204 in the rotation axis direction (Z1-Z2 direction) is preferably twice or less the enlarged diameter width D of the through hole 200. Since the length L of the transition portion 204 is not more than twice the diameter expansion width D, when a pulling force is applied to the seal member 41, the compression resistance of the elastic member constituting the first elastic portion 221 is quickly generated. The retaining function is properly exerted. The shorter the length L of the transition portion 204, the more efficiently the compression resistance can be increased. However, from the viewpoint of improving the workability (molding workability, cutting workability) of the through hole 200 of the case portion 31, the transition portion In some cases, it is preferable that the length L of 204 is up to about ½ of the enlarged diameter width D. It may be preferable that the transition portion 204 is formed of a tapered portion in which the diameter of the through hole 200 changes continuously from the viewpoint of ease of forming the transition portion 204.

In the above-described embodiment and specific example, the fixing bolt 6 has been described as an example as the fastening member, but the present invention is not limited to this configuration. The side stand switch 5 may be attached by tightening, and the fastening member may be formed of a fixing nut, for example.

The embodiment disclosed this time is an example in all respects and is not limited to this embodiment. The scope of the present invention is shown not only by the above-described embodiment but also by the scope of claims, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

As described above, the present invention has an effect that the seal member 41 is difficult to come off even in a state before the fixing bolt 6 is fastened, and in particular, a side stand bar that supports a two-wheeled vehicle such as a motorcycle. It is useful for side stand switches and side stand devices that detect the rotation position.

1: Side stand device 2: Bracket 3, 103: Side stand bar 4, 104: Pivot bolt 5, 101: Side stand switch 6, 106: Fixing bolt 7: Fixing nut 11: Plate-shaped part 12: Through

13, 17, 18: Shaft holes 15, 16: Connecting part 19: Engagement hole 21: Head 22, 112: Screw hole 23: Intermediate part 24: Screw part 27: Flange part 31, 108: Case part 32: Rotor part 33: Case main part 34: Holding part 35: Coupler part 37:

Circular openings

41, 120, 130: Seal member 42: Fixed seal member 43: Fixed contact (part of position detection part)
51, 109: Rotor body (rotating body)
52, 110: Torque receiving member 53: Coil spring 54: Movable contact (part of position detection part)
56, 71: Insertion hole 57: Disk portion 58: Upper shaft portion 59: Lower shaft portion 63, 111: Engagement pin 81: Upper end surface of torque receiving member 93: Engagement hole 107: Restriction pin 200: Through hole 201: Airtight space 202: Airtight part 203: Retaining part 204: Transition part 210: Cylindrical body 211: Flange part 212: Cylindrical part 220: Seal part 221: First elastic part 222: Second elastic part 223: First elastic part Parts facing the airtight space 311 and 131: Caulking part D: Expanded diameter P: Compression rate T, T1: Clearance T0: Thickness

Claims

A rotor part having a rotating body that rotates in conjunction with the side stand,
A case portion having a through hole through which the rotating body is inserted,
A sealing member having a tubular body made of a rigid member extending in the rotation axis direction of the rotating body and a sealing portion fixed to the tubular body and made of an elastic member.
A position detection unit that detects the rotation position of the rotating body, and
With
A side stand switch in which the sealing member is press-fitted between the rotating body and the through hole.
The seal portion has a first elastic portion formed with a thickness equal to the outside of the tubular body and press-contacting with the inner peripheral surface of the through hole, and an outer peripheral portion of the rotating body provided inside the tubular body. A second elastic portion that slidably faces the surface is provided.
The inner peripheral surface of the through hole has an airtight portion and a retaining portion located inside the case portion with respect to the airtight portion at a position facing the tubular body.
The first elastic portion arranged to face the airtight portion is compressed so as to be airtight.
A side stand switch characterized in that the through hole has an enlarged diameter in the retaining portion.
The side stand switch according to claim 1, wherein the enlarged diameter width D of the through hole in the retaining portion satisfies the following formula (1).
D ≧ T × 0.005 (1)
Here, T is the clearance between the through hole and the tubular body in the airtight portion.
The side stand switch according to claim 1 or 2, wherein the retaining portion is provided over the entire circumference of the through hole.
A transition portion in which the diameter of the through hole changes is further provided between the airtight portion and the retaining portion, and the length L of the transition portion in the rotation axis direction is the diameter expansion width D of the through hole. The side stand switch according to any one of claims 1 to 3, which is not more than twice as much as the above.
The side stand switch according to claim 4, wherein the transition portion includes a tapered portion in which the diameter of the through hole continuously changes.
A fixed seal member that is airtightly pressure-contacted with the through hole is further provided at a position separated from the seal member along the direction of the rotation axis.
The method according to any one of claims 1 to 5, wherein the case portion is provided with a support member that regulates the movement of the fixed seal member away from the seal member along the direction of the rotation axis. Side stand switch.
With a side stand bar that supports the car body in an upright position,
Bracket and
Pivot bolts that rotatably attach the side stand bar to the bracket,
The side stand switch according to any one of claims 1 to 6,
A side stand device including a fixing bolt for attaching the side stand switch to the pivot bolt by tightening.
The side stand device according to claim 1 or 2, wherein the retaining portion is partially provided at equal intervals in the circumferential direction over the entire circumference of the through hole.