JPH08207854A - Battery case mounting structure of motor vehicle - Google Patents

Abstract

(57) Abstract: A battery case is positioned with respect to a vehicle body by a connector. SOLUTION: A lock device 24 and a pop-up mechanism are provided at a front end portion of a main frame 10, a substantially box-shaped male motor-side connector 26 is provided at a rear end portion, and an engagement recess 172 is provided at a central portion of a rear surface thereof. . The battery case 20 is provided with a female battery-side connector 100 at the rear end and an engagement protrusion 104 at the center of the back surface. When the battery-side connector 100 is fitted to the motor-side connector 26 and directly abutted, both connectors are positioned and their terminals are accurately coupled, and the coupling between these connectors allows the battery case 20 to be positioned on the vehicle body side.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present application relates to a battery case mounting structure for an electric vehicle.

[0002]

2. Description of the Related Art As an example of a battery case mounting structure for an electric bicycle using a motor as auxiliary power, Japanese Patent Laid-Open No. Hei 5-3
No. 19104 discloses that a rear portion of a battery case provided with a battery side connector is fitted into a support box provided on a frame of an electric bicycle to be supported by the support box, and a motor side connector provided in the support box. And connecting the battery side connector.

[0003]

By the way, such a battery case can be easily attached and detached, and if there is a connection between each terminal of the motor side connector and the battery side connector at the time of attachment, it may cause contact wear. Since there is a bad influence of, the terminals must be able to be accurately connected.

However, in the above embodiment, the battery case is fitted into the support box to position the terminals of both connectors, so that the manufacturing accuracy of the battery case and the support box greatly affects the accuracy of contact coupling. Will be given.
Therefore, a contact coupling structure that is not affected by such manufacturing error is also desired. The present invention satisfies these requirements.

[0005]

In order to solve the above-mentioned problems, a battery case mounting structure for an electric vehicle according to the present invention has a frame of a vehicle body arranged in the front-rear direction between front and rear wheels, and a frame of the vehicle body. A battery case that is detachably attached to the battery case and that houses a battery therein; a battery-side connector that is provided at the rear end of the battery case; and a motor-side connector that is attached to the vehicle body side where the battery-side connector is connected or disconnected. In a battery case mounting structure for an electric bicycle, the battery-side connector and the motor-side connector are configured such that one of them can be fitted into the other so that they can be directly contacted with each other at the time of fitting. .

Further, it is possible to provide a positioning projection on one of the battery side connector and the motor side connector and to provide a positioning recess for fitting the positioning projection on the other side.

[0007]

1 to 7 show a first embodiment. FIG. 2 is a side view of the electric bicycle according to the present embodiment, in which a front frame 6 having a V-shape in side view is provided between the front wheel 2 and the rear wheel 4. The front frame 6 is a head pipe 8
It has a main frame 10 that linearly extends rearward in a diagonally downward direction, an intermediate portion 12 that curves downward, and a seat frame 14 that extends substantially vertically in the vertical direction.

A front fork 16 for supporting the front wheel 2 at its lower end and a steering post 19 having a handle 18 mounted at its upper end are rotatably supported on the head pipe 8. A battery case 20 for accommodating a battery, which will be described later, has a length substantially the same as that of the main frame 10, and is detachably mounted between the front fixing portion 22 and the motor side connector 26 which is a male connector. There is. Reference numeral 24 is a lock device.

An auxiliary power unit 30 is supported on the intermediate portion 12 via a hanger plate 28. A rear fork 32 having a front end attached to the auxiliary power unit 30 extends rearward substantially horizontally, and a rear end of the pair of left and right rear stays 3 extends obliquely downward from an upper end of the seat frame 14.
The rear frame 37 is joined to the bracket 36 together with the rear end of the rear frame 4. Rear wheel 4 with this bracket 36
The rear wheel axle 5 and the driven sprocket 38 are rotatably supported.

A saddle seat 42 is supported on the upper end of the seat frame 14 via a seat post 40.
The front frame 6 and the periphery of the auxiliary power unit 30 are covered with a vehicle body cover 44. The vehicle body cover 44 is divided into left and right parts, and a front end portion thereof has a front fixing portion 22 and a battery case 20.
It covers the front part of the and also matches the slope wall 45.

At the rear end of the battery case 20,
On the rear side surface, a slanted wall 46 is formed at the front end portion of the vehicle body cover 44 that covers the locking device and is slanted rearward, and an opening is formed in the front portion of the seat frame 14, which is closed by the front panel 48. Has been.

The auxiliary power unit 30 comprises a control unit 50, a motor 52 and a mission 54. The crankshaft 56, which is the output shaft of the mission 54, rotates together with the drive sprocket 58, and rotates the driven sprocket 38 of the rear wheel 4 via the chain 59.

A pedal 57 is attached to the crankshaft 56 and is manually driven by stepping on it. At this time, the motor 52 is rotated by electric power supplied from the battery in the battery case 20 to form auxiliary power. The control unit 50 controls the rotation of the motor 52 based on the torque from the pedal 57 and the rotation speed of the drive sprocket 58.

FIG. 1 is a side view showing the front frame 6 portion with the vehicle body cover 44 removed, and FIG. 3 is a section 3-3 of FIG.
FIG. 4 is a partially cutaway side view of the battery case 20, FIG. 5 is a view showing a front side mounting structure of the battery case 20, and FIG. 6 is a main part of the front side mounting structure of the battery case 20. FIG. 7 is a view showing the side (Z direction of arrow in FIG. 1), and FIG. 7 is a view showing a rear side attachment structure of the battery case 20.

As is apparent from FIG. 1, the front side fixing portion 22 is provided at the front end portion of the main frame 10, and the motor side connector 26 is provided near the intermediate portion 12. The battery case 20 has a mounting position shown by a solid line A in which the front end is locked by the lock device with the rear end fitted to the motor side connector 26, and an imaginary line B in which the front end is lifted by unlocking the lock device. You can take the pop-up position shown.

The position indicated by the virtual line C is the main frame 10
In the state (or the state before attachment) detached in the direction substantially perpendicular to the length direction (direction indicated by the arrow X). It should be noted that the battery case 20 can slide substantially along the length direction of the main frame 10 (direction indicated by the arrow Y) when the attachment position A and the pop-up position B change.

As is apparent from FIG. 3, the battery case 2
Reference numeral 0 denotes a plastic member composed of an upper case 60 and a lower case 62 which are vertically divided into two parts, and a meeting part 64 of the two forms a step part which overlaps with each other alternately, thereby forming a labyrinth structure and water. Are prevented from entering.

A battery pack 66 is accommodated in the battery case 20, and an upper portion of the battery pack 66 is formed so as to project downward from the inner surface of the upper case 60 and a groove rubber 70 attached to a rib 68 abuts the lower portion of the battery pack 66. Is supported by a plate-shaped cushion rubber 74 interposed between the bottom portion of the bottom case 72 and the bottom portion 72 of the lower case 62.

Reference numeral 76 in FIG. 3 is a limit switch, which is attached to the inner surface of the vehicle body cover 44 and has a leaf spring 78 extending downward from the upper portion when the battery case 20 is attached to the vehicle body cover 44. The projection 73, which is formed so as to project downward from the bottom 72, is turned on by pushing, and turned off at the pop-up position described later.

As is apparent from FIG. 4, the battery case 2
The upper case 60 and the lower case 62 of 0 are engaged with the engaging claws 80 projecting upward from the lower case 62 on the front side of the side portion, and are fastened with the tapping screw 82 on the rear side so that they can be separated from each other. It is integrated. A rubber cushion member 84 is provided on the bottom first half of the lower case 62 when it is attached to the main frame 10.

A handle 86 is rotatably attached to the front end of the battery case 20, and an oblique step 88 is formed on the side surface of the battery case 20 to cover the front fixing portion 22.
4 and the slope wall 45 provided at the front end portion of No. 4 (FIG. 1). A lower portion of the front surface 90 is a notch-shaped pushing pressure step portion 92 that bites rearward.

At the rear end of the battery case 20,
A rear slope 94 that obliquely rises rearward is formed on the rear side surface so as to coincide with the slope wall 46 provided at the front end of the vehicle body cover 44 that covers the locking device (FIG. 2).
Further, the back surface 96 of the upper case 60 is formed as a slope that is opposite to the rear slope 94.

Further, a battery-side connector 100, which is a female connector, is attached to the rear end of the battery case 20 with screws 98 or the like. Battery side connector 10
The rear surface 102 of 0 is an abutting surface of a motor-side connector, which will be described later, and an engaging projection 104 for positioning, which has a substantially triangular shape in a side view, projects from a central portion thereof. Battery side connector 1
The bottom rear end of 00 is a guide slope 1 which is inclined rearward and upward.
It is 06.

The battery pack 66 includes a large number of unit batteries 11
Heat-shrink tube 1 with 0 connected in series and arranged in two stages
11 is a battery pack assembled into one pack. Unit battery 11
Reference numeral 0 is a rechargeable type such as a Ni-Cd type.

Adjacent unit batteries 110 are connected in series by a conductive plate 112, and are connected to a discharge terminal of a battery side connector 100 described later via a fuse 114. Reference numeral 116 in the figure indicates a temperature detecting thermistor 117.
Is a lead wire and 118 is a charging terminal.

The charging terminal 118 has a built-in diode for preventing backflow and is attached to the rear side surface of the lower case 62. Further, since the battery case 20 is provided separately from the discharging terminal, the battery case 20 can be charged in either the mounted state or the detached state.

FIG. 5 shows a detailed structure of the front side fixing portion 22 with respect to the battery case 20. The front side fixing portion 22 includes a lock device 24 and a pop-up mechanism. Lock device 2
Reference numeral 4 denotes a front bracket 1 provided between the head pipe 8 and the front end of the main frame 10 and bent in a substantially L-shaped cross section.
It is attached to a vertical wall portion 122 extending in the vertical direction.

The lock device 24 is provided with a key 124 (FIG. 6).
As a result, it is a combination switch that locks or unlocks the battery case 20 by inserting and removing the lock pin 126 into and from the lock hole 128 formed in the front surface 90, as well as the main switch function of turning the power on and off.

When the key position of the lock device 24 is the on position, the lock pin 126 is locked and the key 124 is locked.
Of the motor 5 from the battery pack 66
2 is energized, and energization is stopped at the off position to allow the key 124 to be pulled out, but the lock pin 126 remains locked. When the key 124 is pushed and turned from this off position to the locked position, the lock pin 12
6 is unlocked and the battery case 20 can be removed.

A lock plate 132 is attached to the inside of the front surface 90 by a screw 130 to reinforce the front surface 90, and an opening portion 134 which coincides with the lock hole 128 is provided in this. Further, the lower end portion thereof forms a step portion that extends to the pressing pressure step portion 92 and is exposed, and forms an unlocking pressing surface 136 and a locking pressing surface 138 in the front-rear direction.

The pop-up mechanism is a stay 140 provided on the standing wall 122 below the lock device 24, a swing arm 144 supported by the slide shaft 142, and the swing arm 144 is rotated counterclockwise. A tension spring 146 (FIG. 1) for urging is provided.

As is apparent from FIG. 6, the stays 140 are provided as a pair so as to project forward with an interval in the vehicle width direction, and each of the elongated holes 14 extends long in the front-rear direction.
8 is formed, and the slide shaft 142 is movable in the front-rear direction. On the other hand, the swing arm 144 has a substantially U shape in a plan view, and the pair of left and right flat portions 150 are overlapped on the outside of each stay 140.

The slide shaft 142 extends in a direction traversing between the left and right flat portions 150 through the elongated holes 148 of the left and right stays 140, and the swinging arm 144 is movable in the front-rear direction with respect to the stay 140 and of the slide shaft 142. It is connected so that it can swing freely.

A portion of the swing arm 144 extending in the vehicle width direction and connecting the left and right flat portions 150 forms a pressing portion 152, and is pushed to the unlocking pressing surface 136 or the locking pressing surface 138 of the lock plate 132. It is possible now.

The tension springs 146 are a pair of coil springs provided along the lengthwise direction on the left and right side surfaces of the main frame 10, and are attached to the mounting projections 154 (FIG. 1) formed at the front end of the flat portion 150 so as to project downward. ) To the main frame 1.
It is locked to a protrusion 158 protruding to the side surface of 0.

The tension spring 146 always urges the swing arm 144 so as to pull it rearward, and the pressing portion 15
2 is urged to rotate counterclockwise. Therefore, at the pop-up position shown by the virtual line B, the swing arm 1
44 is pulled rearward, the slide shaft 142 moves to the rear end of the elongated hole 148, and the pushing portion 152 pushes the pushing surface 136 and lifts it upward when unlocking the tension spring 1.
Most of the pulling force of 46 acts as the lifting force F1.

Further, when the battery case 20 is attached as indicated by the solid line A, the unlocking pushing surface 136 pushes the pushing portion 152 downward in the clockwise direction, so that the swing arm 144 is opened.
Is substantially parallel to the length direction of the main frame 10, and the pushing portion 152 is locked by the pushing surface 138 to lock the swing arm 14.
4 is pushed forward against 4 and the slide shaft 142 moves into the long hole 14
Move to the front end of 8.

Therefore, the reaction force of the tension spring 146 becomes the force with which the pressing portion 152 presses the unlocking pressing surface 136 and the locking pressing surface 138. However, the force F2 that pushes the pushing surface 138 backward when the pushing portion 152 is locked is the pushing surface 13 when unlocking.
It is significantly larger than the force F3 that pushes up 6. The pushing force F3 is large enough to pop up the front part of the battery case 20 when the lock device 24 is released.

Further, in the pop-up position, the slide shaft 142 moves to the rear end portion of the elongated hole 148, and the pressing portion 152 rotates counterclockwise to push up the unlocking pressing surface 136.

Reference numerals 121 and 159 in FIGS. 1 and 5 are indicators provided on the upper part of the front bracket 120 for indicating the on-positions of the stay for mounting the vehicle body cover 44 and the lock device 24, respectively.

Next, the motor side connector 26 and the battery side connector 100 will be described. 8 is a side view of the motor side connector 26, FIG. 9 is a front view, FIG. 10 is a plan view, and FIG. 11 is an enlarged view of a positioning protrusion (described later). 12 is a front view of the battery side connector 100, FIG. 13 is a rear view,
14 is a plan view and FIG. 15 is a side sectional view.

The motor side connector 26 is the main frame 1
0 is provided in the vicinity of the intermediate portion 12, and as can be seen in FIGS. 7 and 8 to 11, the upper mounting portion 160 has the opening / closing portion 48.
It is attached by screws 162 and nuts 164 so as to overlap the lower end front surface central portion 49. In addition, the lower end front surface center portion 4
The inclination of 9 and the inclination of the back surface 96 coincide with each other when the battery case 20 is attached.

Lower mounting portion 166 of the motor-side connector 26
Is also attached to the vehicle body cover 44 by attaching means such as a screw (not shown).

A contact surface 170 is formed on the inner surface of the rear surface 168 for contacting the rear surface 102 when the battery-side connector 100 is mounted, and a contact surface 170 for positioning in the battery longitudinal direction is formed at a position corresponding to the engaging projection 104 for positioning. Is a protrusion 172 having an engaging recess 172 formed therein which is fitted therein.
c is provided so as to project rearward, and a guide surface 174 having substantially the same inclination is formed at a position corresponding to the guide slope 106.

The engagement recess 172 is formed to be larger than the engagement protrusion 104. When the battery case 20 is attached, the top portion 104a of the engagement protrusion 104 abuts on the top surface 172a in the engagement recess 172 to position the battery case 20 in the vertical direction.

The lower slopes 172b and 104b of the engagement recess 172 and the engagement protrusion 104 are inclined to the same extent, but a certain gap is formed between them.

A pair of pin-shaped motor terminals 176 are provided on the left and right of the abutment surface 170, and the projecting tips 178 of the motor terminals 176 project inward of the battery case 20. The rear end portion 180 extends outside from the rear surface 168 and is connected to the cord 182. This cord 182 is connected to the control unit 50 (FIG. 2).

A pair of side wall portions 184 to which the battery side connector 100 is fitted are formed on the left and right sides of the motor side connector 26. The front edge portion 186 of the side wall portion 184 contacts the sloped wall 46 of the battery case 20 (FIG. 2). Positioning protrusions 179 are integrally formed with the abutment surface 170 at intermediate portions of the left and right motor terminals 176 (see FIG. 11), and the tips thereof are longer than the tip portions 178 of the motor terminals 176 in the forward direction. It is protruding (Fig. 10).

Next, the battery side connector 100 will be described with reference to FIGS. 7 and 12 to 15. The upper portion 190 of the battery side connector 100 is inside the upper case 60. Reference numeral 190a denotes the back surface 9 of the upper case 60.
6 is a projection for positioning that fits with 6.

The lower portion 192 is a screw through hole 192a portion, which is a screw 99 from the outside of the rear wall 63 (FIG. 4) of the lower case 62.
It is installed in. The central portion of the rear portion of the lower portion 192 forms a projecting portion 193 that projects outward and rearward from the central portion of the rear wall 63, and the rear surface 102 and the engaging projection 104 are formed therein.
Further, a pair of left and right terminal insertion holes 194 are formed at positions corresponding to the motor terminals 176.

The terminal inlet / outlet hole 194 communicates with the recess 195 formed in the lower case 62 side portion of the lower portion 192, and the length of the motor terminal 176 is such that the tip end portion 178 has the terminal inlet / outlet hole 194 when the battery case 20 is attached. Through recess 195
It is designed to be able to project inside.

In the recess 195, a leaf spring-shaped discharge terminal 1 is provided.
96 is arranged long in the vertical direction, the substantially U-shaped portion 197 formed at the upper end is inserted into the slit formed in the upper portion 190, and the nut 191 that is also previously inserted and fixed is sandwiched and overlapped. The lead wire coming from the battery pack 66 is fastened together with a screw (not shown).

The free end 198 of the lower end portion is designed to cover the outlet portion facing the concave portion 195 of the terminal inlet / outlet hole 194 as shown by the phantom line, and the tip portion 178 of the motor terminal 176 is attached when the battery case 20 is attached. When projecting into the recess 195 through the terminal hole 194, it is pushed forward by the tip 178 and elastically deformed as shown by the solid line, and the free end 198 comes into contact with the tip 178 with high contact pressure. There is.

A pair of ribs 199 which are parallel to each other in the vertical direction are formed at predetermined intervals between the left and right terminal insertion / removal holes 194, and a long hole 199a which is long in the vertical direction is formed in a portion sandwiched by the ribs 199. (FIGS. 12 and 13). When the battery side connector 100 is attached to the motor side connector 26, the positioning protrusion 179 of the motor side connector 26 is inserted into the elongated hole 199a.

The mounting position (solid line A) and pop-up position (virtual line B) of the battery case 20 in FIG.
In any of the above cases, the leading end 178 is fitted into the terminal insertion / removal hole 194 and comes into contact with the free end 198 to establish a conductive state.
Therefore, when it is in the pop-up position, the limit switch 76
Is turned off to cut off the energization from the free end 198 to the tip portion 178, and the limit switch 76 is turned on to energize only in the mounted state.

The motor side connector 26 and the rear side of the battery case 20 are connected and separated by the battery case 2.
0 in the direction indicated by the arrow Y in FIG. 1 so that the motor terminal 1 is connected to the discharge terminal 196 of the battery side connector 100.
76 is moved in and out, and at the same time, the engagement protrusion 104 of the battery side connector 100 is moved in and out of the engagement recess 172 of the motor side connector 26. At this time, the stroke amount of the battery case 20 in the Y direction is covered by the stroke of the slide shaft 142.

Next, the operation of this embodiment will be described. FIG.
At the mounting position indicated by the solid line A in FIG.
The battery side connector 100 provided here is fitted to the motor side connector 26 and fixed to the rear end portion by direct contact.

Therefore, the battery case 20 is accurately positioned in all three directions of front, rear, left and right by fitting directly with both connectors at the time of mounting, and is not affected by the dimensional error of the battery case 20 and the discharging terminal 196. It is possible to accurately connect the contacts of the motor terminal 176. Moreover, rattling is reduced and contact wear is also reduced.

Further, in addition to the positioning by directly fitting the both connectors, the battery case 20 can be positioned in the vertical direction by fitting the engagement projection 104 into the engagement recess 172, and the battery case rear end 94 is positioned at the motor end. By fitting the left and right side walls 184 of the side connector 26 inside, lateral positioning can be performed. Therefore, the connection between the terminals can be made more reliable.

Moreover, since the battery case 20 is pushed rearward by the tension spring 146 via the swing arm 144, a force for pushing the battery case 20 in the connecting direction of the discharge terminal 196 and the motor terminal 176 acts, and the free end 198 The contact pressure on the tip portion 178 of the motor terminal 176 can be increased. For this reason, contact pressure change such as chattering between both terminals due to vehicle body vibration can be prevented even by this high contact pressure, contact wear can be prevented, and terminal life can be extended.

At this time, the free end 198 is formed into a leaf spring shape,
Since the tip portion 178 is in contact while elastically deforming the tip portion 178, it is effective in further increasing the contact pressure, and the contact pressure is expected to increase due to its own weight also in that the battery case 20 is inclined forward and upward. it can.

Next, when the battery case 20 is removed, the lock device 24 is unlocked by the key 124, and the swing arm 144 is caused by the spring force of the tension spring 146 so that the slide shaft 142 causes the rear end of the elongated hole 148. 1 is slid backward until it reaches the battery part, and is pulled back, and at the same time, it swings counterclockwise, and as shown by phantom line B in FIGS. 1 and 5, it is in a pop-up position for pushing up the front part of the battery case 20. By pulling the handle 86 in a direction substantially perpendicular to the lengthwise direction of the main frame 10 (direction indicated by arrow X in FIG. 1), the main frame 10 can be easily removed as shown by an imaginary line C.

In order to mount the battery case 20, first, in FIG.
Of the main frame 10 in a direction substantially perpendicular to the longitudinal direction (direction indicated by X in FIG. 1), and further slid backward in a direction substantially parallel to the longitudinal direction of the main frame 10 (direction indicated by Y in FIG. 1). The battery side connector 100 is fitted to the motor side connector 26.

As a result, the engaging projection 104 is engaged with the engaging recess 17
2 and at the same time the motor terminal 176 is the discharge terminal 1
Entering 96, tip 178 connects with free end 198. These are smoothly and surely performed by the positioning action of the motor side connector 26. Tip 1 at this point
Although the 78 and the free end 198 can be electrically connected, the limit switch 76 is still off, so that the electricity is cut off and the durability of the terminal is improved.

At this time, the swing arm 144 is in the position shown by the phantom line, and the unlocking pressing surface 136 of the front portion of the battery case 20 contacts the pressing portion 152 of the swing arm 144, but the pressing portion 152. Since the push-up force of the tension spring 146 acting on the battery supports the weight of the battery case 20, the battery case 20 is in a pop-up position in which the front side is tilted slightly upward as shown by a virtual line B.

When the lock device 24 is not locked like the pop-up position, the battery case 20 is not fully set. The conduction failure between the terminal 176 and the free end 198 will occur. However, according to the present embodiment, in such a case, the pop-up position is always set, so that the visual confirmation can be performed immediately.

Then, when the front end of the battery case 20 is pushed down, the pushing surface 136 at the time of unlocking pushes down the pushing portion 152 in the clockwise direction, so that the swing arm 144 resists the spring force of the tension spring 146. Slide shaft 14
2 moves in the elongated hole 148 and is pushed in until it reaches the front end portion and slides forward to be in the state shown by the solid line.

Therefore, when the lock device 24 locks the front end portion of the battery case 20 by operating the key 124 at this position, the tension spring 14 acting on the pressing portion 152.
Of the spring forces of 6, the force that pushes the locking pressing surface 138 backward increases to push the battery case 20 backward.
Therefore, the battery-side connector 100 can be more firmly pushed into the motor-side connector 26 and securely fixed.

At this time, the guide slope 106 is changed to the guide surface 17
4, the top portion 104a of the engaging projection 104 is guided.
Comes into contact with the top surface 172a of the engaging recess 172 and is vertically positioned, and the tip portion 178 of the motor terminal 176 is provided.
Can go deeper into the concave portion 195 to elastically deform the discharge terminal 196 side toward the free end 198 to a greater extent.

Next, another embodiment of the connector will be described with reference to FIGS. In this embodiment, the battery is not positioned by directly fitting the connectors to each other, but the positioning guide is used when the connectors are joined.

16 to 21 relate to a female battery side connector 200, and FIGS. 22 to 24 relate to a male motor side connector 300. First, regarding the battery side connector, FIG. 16 is a three-dimensional view seen from the front side,
17 is a rear view, FIG. 18 is a side view, FIG. 19 is a bottom view, FIG. 20 is a sectional view taken along line 20-20 of FIG. 17, and FIG.
FIG. 21 is a sectional view taken along line 21.

In these figures, the battery-side connector 200 includes a front case 202 and a back case 204,
A case integrated by engaging the engaging member 206 and the engaging protrusion 208 on the side is provided.

As is apparent from FIG. 16, the front case 202
An engaging portion 212 protruding from the surface for locking the fuse holder 210 is integrally formed on the upper side, and contact preventing ribs 214 and 216 are formed on both sides of the upper portion so as to project laterally. The negative side conducting wire coming from the battery is connected to the portion covered with 214, and the positive side conducting wire is connected to the portion covered with the other contact prevention rib 216. Further, a rotation preventing rib 218 is integrally formed below the contact prevention rib 214 so as to project laterally.

Projecting portions 220, 222 for attaching to the battery case are formed on both sides of the lower end. A sandwiching rib 224 is formed on the one of the mounting portion projections 222 so as to project forward. The holding rib 224 has a curved notch 22.
6 is formed so that the charging coupler 228 is sandwiched between the sandwiching ribs 232 which are formed in advance in the battery case and have the symmetrical notches 230. At this time, the flange 234 of the charging coupler 228 is fitted and positioned in the grooves 236 and 238 formed in the notches 226 and 230.

A movement prevention step portion 240 is formed in an inclined shape at the center of the lower end portion on the front surface side of the front case 202, and comes into contact with a movement prevention rib 242 (FIG. 21) projecting from the bottom portion side of the battery case, whereby the motor side The contact pressure is secured by preventing the movement of the connector 300 even if it is pushed forward when it is connected to the connector 300. Note that the structure of the battery case to which the battery-side connector 200 is attached is the same as that of the previous embodiment, so a description thereof will be omitted.

As is apparent from FIG. 17, the back case 204
In the lower left and right, arch-shaped ribs 250 and 252 are formed, and terminal fitting grooves 254 and 256 are formed in the portion surrounded by the ribs 250 and 252 (see FIG. 20), and this opening is used as a terminal. The free end side portions of the plates 258 and 260 are closed from the inside.

The other ends of the terminal plates 258 and 260 are fixed ends 262 and 264 which are bent in a substantially U shape. The terminal plate 258 (the same structure of the terminal plate 260) is housed in the battery side connector 200 and covered with the back case 204, and the fixed end 262 of the nut 266 is fitted and attached to the front case side in advance (FIG. 20). It is attached to 268 (Fig. 18) with screws 270 (Fig. 20), 272 (Fig. 18).

FIG. 20 shows a state in which the terminal plate 258 is removed, and the back case 204 is covered before the back case 204 is covered.
And the folded-back portion of the fixed end 262 is mounted on the nut 266. FIG. 19 is a view showing the right side in FIG. 17, and the fixed end 264 (262) is fixed to the nut 268 together with the lead wire 2274 coming from the battery by the screw 272 from the side. The same applies to the terminal plate 258 side.

As is apparent from FIGS. 17 and 21, a guide groove 280 is formed between the left and right ribs 250 and 252 in the shape of a long groove in the vertical direction, and the wall portion 282 on the lower side thereof has a terminal fitting groove 254. 256, the upper end is fixed end 26
A partition wall-shaped short-circuit prevention rib 284 is provided to partition the space between No. 2 and 264. This short-circuit prevention rib 284 allows the fixed end 26
It is possible to prevent a short circuit by ensuring a sufficient creepage distance between the two and the two.

The wall portion 282 has terminal plates 258, 260.
The ribs 25, as is apparent from FIG.
0 (252) projects higher than the surface of the terminal plate 258 (260), the left and right terminal plates 258,
The creepage distance between 260 is enlarged to prevent short circuit.

Next, the motor side connector 300 will be described. 22 is a front view, FIG. 23 is a sectional view taken along line 23-23 of FIG. 22, and FIG. 24 is a sectional view taken along line 24-24 of FIG. In these figures, the motor-side connector 300 is provided with mounting protrusions 302 on the vehicle body side on both sides, and a pair of terminals 304 and 306 project to the battery-side connector 200 side on the left and right of the central portion, and a guide protrusion 308 is provided between them. Both terminals 304, 306
Protruding to isolate.

The terminals 304 and 306 are located at positions where they can be fitted into the terminal fitting grooves 254 and 256 of the battery side connector 200, and the guide protrusion 308 is also formed at a position where they can be fitted into the guide groove 280.

As is apparent from FIG. 24, the guide protrusion 308 has the terminal 306 (terminal 30) both in the vertical direction and in the length direction.
4 is also the same) and both terminals 304, 306
Prevents electric discharge between. Further, the tip has a thin, substantially triangular shape to facilitate fitting into the guide groove 280,
Moreover, contact is prevented when a linear conductor is placed between both terminals 304 and 306.

Both terminals 304 and 306 are connected to the conducting wire 310 coming from the controller 50 on the back surface of the motor-side connector 300, and the connecting portions are separated by ribs 312.

As is apparent from FIG. 23, both terminals 304,
Movement prevention protrusions 314 are integrally formed on both sides in the vicinity of the base of 306 so as to project laterally. When the motor-side connector 300 is attached to the vehicle body-side member 316 by the attachment protrusion 302 with the screw 318, the vehicle body-side member 316 is formed. Even if the screw 318 is loosened between the motor side connector 300 and the vehicle body side member 316.
Are difficult to separate.

Next, the operation of this embodiment will be described. When the battery case is attached to the vehicle body in the same manner as the previous embodiment, the terminal fitting groove 25 of the battery side connector 200 is formed.
4, 256 to terminals 304 of the motor side connector 300, 3
06 is fitted to connect with the terminal plates 258 and 260 with sufficient contact pressure. At this time, the guide protrusion 308 is also in the guide groove 2.
80, so that the terminals 304, 306
The terminal plates 258 and 260 corresponding to the above can be accurately positioned, and even if it is configured as in the present embodiment, the contact connection can be made more reliable.

[0087]

Since the battery case mounting structure for an electric vehicle according to the present invention is configured so that the battery side connector is directly fitted to the motor side connector, when the battery case is mounted on the vehicle body, the battery side connector is connected to the motor side. When mated with the side connector, both connectors directly contact with each other in a mated state, so that they are accurately positioned to ensure contact coupling, and contact wear due to chattering or the like can be prevented. Moreover, since the battery case is positioned with respect to the vehicle body by the connection between the connectors, it is possible to prevent the contact connection from being affected even if there is a manufacturing error in the battery case.

If one of the battery side connector and the motor side connector is provided with a positioning projection and the other is provided with a positioning recess for fitting the positioning projection, the two connectors are joined together. At this time, since the positioning projection fits with the positioning recess, the contact coupling can be made accurate.

[Brief description of drawings]

FIG. 1 is a side view of a main portion of a front frame portion according to a first embodiment.

FIG. 2 is a side view of the bicycle with auxiliary power according to the first embodiment.

FIG. 3 is a sectional view taken along line 3-3 of FIG.

FIG. 4 is a partially cutaway side view of the battery case according to the first embodiment.

FIG. 5 is a view showing a front side attachment structure of the battery case in the first embodiment.

FIG. 6 is a diagram showing a main part of a front mounting structure of the battery case, as viewed in the Z direction shown in FIG.

FIG. 7 is a diagram showing a rear side attachment structure of the battery case in the first embodiment.

FIG. 8 is a side view of the female connector on the motor side.

FIG. 9 is a front view of the same.

FIG. 10 is a plan view of the same.

FIG. 11 is an enlarged view of a positioning protrusion.

FIG. 12 is a front view of a battery side male connector.

FIG. 13 is a rear view of the same.

FIG. 14 is a plan view of the same.

FIG. 15 is a side view of the same.

FIG. 16 is a three-dimensional view of the battery-side female connector according to the second embodiment as seen from the front side.

FIG. 17 is a rear view of the same.

FIG. 18 is a side view of the same.

FIG. 19 is a bottom view of the same.

20 is a sectional view taken along line 20-20 of FIG.

FIG. 21 is a sectional view taken along line 21-21 of FIG.

FIG. 22 is a front view of the motor-side male connector according to the second embodiment.

23 is a sectional view taken along line 23-23 of FIG.

24 is a sectional view taken along line 24-24 of FIG.

[Explanation of symbols]

10: Main frame, 20: Battery case, 22:
Front side fixed part, 24: locking device, 26: motor side connector, 100: battery side connector, 104: engagement protrusion,
144: swing arm, 146: tension spring,
172: Engagement recess, 176: Motor terminal, 196: Discharge terminal, 200: Battery side connector, 258: Terminal plate, 258: Terminal plate, 282: Guide groove (positioning recess), 300: Motor side connector , 304: terminals, 3
06: terminal, 308: guide projection (positioning projection)

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Masaaki Yamaguchi Inventor Masaaki Yamaguchi 1-4-1 Chuo, Wako-shi, Saitama, Ltd. Honda R & D Co., Ltd. Stock Company Honda Technical Research Institute

Claims (3)

[Claims] 1. A frame of a vehicle body arranged in the front-rear direction between a front wheel and a rear wheel, and a battery case detachably mounted on the frame of the vehicle body and containing a battery therein.
In a battery case mounting structure for an electric bicycle, which includes a battery-side connector provided at a rear end portion of the battery case and a motor-side connector mounted on a vehicle body side to which the battery-side connector is connected or separated, A battery case mounting structure for an electric vehicle, characterized in that one of the motor side connectors is configured to be capable of being fitted to the other so that they are brought into direct contact with each other at the time of fitting. 2. The battery case mounting structure for an electric vehicle according to claim 1, further comprising a pressing means for pressing the battery case so as to press the battery side connector toward the motor side connector when mounting the battery case on the vehicle body. 3. A frame of a vehicle body arranged in the front-rear direction between a front wheel and a rear wheel, and a battery case which is detachably mounted on the frame of the vehicle body and accommodates a battery therein.
In a battery case mounting structure for an electric bicycle, which includes a battery-side connector provided at a rear end portion of the battery case and a motor-side connector mounted on a vehicle body side to which the battery-side connector is connected or separated, A battery case mounting structure for an electric vehicle, characterized in that one of the motor-side connectors is provided with a positioning projection, and the other is provided with a positioning recess into which the positioning projection fits.