JP2007091190A - Wire returning structure for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a wire from being deflected on the midway by promoting returning of the wire. <P>SOLUTION: In the vehicle provided with a drive switching part 70 including an operation lever operated by a driver; a wheel drive switching lever 70C for switching a wheel in the drivable state by operating the operation lever; and an inner wire 132 as a wire for connecting each of these operation lever and the wheel drive switching lever 70C, a long hole 148 for promoting returning of the inner wire 132 when the operation lever is returned in order to release the drivable state of the wheel is provided on the wheel drive switching lever 70C. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a drive wheel switching wire return structure in a part-time four-wheel drive vehicle that manually switches between two-wheel drive and four-wheel drive.

As a conventional vehicle wire return structure, a deflock operating device using a wire is known (see, for example, Patent Document 1).
Japanese Utility Model Publication No. 58-170225

1 and 3 of Patent Document 1 describe that a lever 19 provided on the handle side and a differential lock mechanism provided on the differential gear device 6 side are connected by an operation wire 18. .
As shown in FIGS. 2 and 3 of Patent Document 1, the differential locking mechanism is connected to a bifurcated shift arm 12 for intermittently engaging the differential locking clutch 10, and the shift arm 12 via a link 16. A differential lock arm 14 connected to the end of the operation wire 18 and a torsion coil spring 17 that biases the differential lock arm 14 toward the side where the clutch 10 is disengaged (the differential lock release side).

  In order to enter the differential lock state, the lever 19 is pulled and the differential lock arm 14 is swung counterclockwise via the operation wire 18, the shift arm 12 is swung, and the shift ring 20 is moved by the cam slope 121 provided on the shift arm 12. Then, the clutch ring 9 is moved in the axial direction of the rear wheel shaft 3L to bring the clutch 10 into a connected state. As a result, the rear wheel shaft 3L and the differential gear box 63 of the differential gear device 6 are rotated together, and the left and right rear wheel shafts 3L and 3R are rotated integrally.

  To release the differential lock state, the lever 19 is operated to return the operation wire 18. As a result, the differential lock arm 14 swings clockwise by the elastic force of the torsion coil spring 17, the shift arm 12 swings, and the cam slope 121 of the shift arm 12 moves away from the angle projection 201 provided on the shift ring 20 side, The clutch 10 is disconnected. As a result, the rear wheel shaft 3L and the differential gear box 63 rotate independently, and the differential lock state is released.

  When the operation wire 18 is pulled by operating the lever 19 in order to enter the differential lock state, for example, the crest and crest of the clutch 10 may face each other and may not mesh with each other. Since the compression coil spring 25 is compressed, there is no problem in the operation of the lever 19.

  For example, when the lever 10 is operated and the operation wire 18 is returned, the clutch 10 is configured to be connected. When the mountain and the mountain of the clutch 10 do not face each other, the operation is performed when the lever 19 is operated. It is expected that the wire 18 will not temporarily return and a part of the long operation wire 18 will bend. Therefore, assuming that the operation wire 18 is bent, it is necessary to take measures such as securing a gap so as not to interfere with other components.

  An object of the present invention is to prevent the wire from bending in the middle by promoting the return of the wire.

The invention according to claim 1 includes an operation lever operated by a driver, a wheel drive switching lever that switches a wheel to a drivable state by operating the operation lever, and each of these operation lever and wheel drive switching lever. In a vehicle equipped with a drive switching device including a wire to be connected, an elongated hole is provided in the wheel drive switching lever to facilitate the return of the wire when the operation lever is returned to release the wheel drivable state. It is characterized by.
As an action, when the operation lever is returned in order to release the drivable state of the wheel, the end of the wire is urged to return by the long hole. As a result, an excessive force does not act on the wire.

The invention according to claim 2 is characterized in that a return spring is provided downstream of the wheel drive switching lever to return the wheel drive switching lever to the drive release side.
As an action, the wheel drive switching lever returns to the drive release side by the elastic force of the return spring. Therefore, the wheel drive can be smoothly released.

  In the invention according to claim 1, since the wheel drive switching lever is provided with a long hole that facilitates the return of the wire when the operation lever is returned to release the wheel drivable state, the wire is returned by the operation lever. In this case, the end of the wire can return within the elongated hole, so that an excessive force does not act on the wire, and the wire can be prevented from bending in the middle. Therefore, there is no worry that the wire interferes with other parts.

  In the invention according to claim 2, since the wheel drive switching lever is provided downstream of the wheel drive switching lever, the wheel drive switching lever can be easily returned by the return spring. The wheel can be released smoothly and the usability of the vehicle can be improved.

The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals.
FIG. 1 is a side view of a vehicle that employs a wire return structure according to the present invention. A vehicle 10 includes a power unit 14 including a longitudinal engine 12 and a transmission 13 disposed substantially at the center of a body frame 11, and this power unit. A front final assembly 16 disposed in front of 14 and a transmission 13 are connected by a front propeller shaft 17, and a rear final assembly 18 disposed behind the power unit 14 and a transmission 13 are connected by a rear propeller shaft 21. This is a drive type rough terrain vehicle (ATV).

  The vehicle body frame 11 surrounds the power unit 14 in a side view in a pair of left and right lower frames 31 and 32 (only the reference numeral 31 on the front side is shown) that supports the lower part of the power unit 14 and above the lower frames 31 and 32. A pair of left and right upper frames 33, 34 (only the reference numeral 33 on the front side is shown) attached to the upper part of the upper frame 33, 34 and the front ends of the lower frames 31, 32, respectively. And a pair of left and right front connecting frames 41 and 42 for connecting the front frames 36 and 37 and the upper frames 33 and 34, respectively. (Only the front side reference numeral 41 is shown) and extending rearward from the upper rear parts of the upper frames 33 and 34 During part (only the reference numeral 43 on the near side.) A pair of left and right rear upper frame 43 coupled to the middle to the rear end of the lower frame 31, 32 and a.

  The engine 12 has an intake device 53 and an exhaust device 54 connected to the cylinder portion 51, and the intake device 53 includes an air cleaner 56 and a throttle body 57, and the exhaust device 54 includes an exhaust pipe 61, a muffler 62, and the like. Consists of.

  The front final assembly 16 is a device connected to the left and right front wheels 68 and 69 via a pair of left and right drive shafts 66 and 67 (only the front side reference numeral 66 is shown). This is a device provided with a drive switching unit 70 for intermittently transmitting a driving force transmitted to the final assembly 16. That is, the drive switching unit 70 is a part that switches the vehicle 10 to the rear wheel drive or the four wheel drive by driving or non-driving the front wheels 68 and 69.

The driving force switching unit 70 is a wheel drive switching lever that switches the front wheels 68 and 69 to a drivable state via the operation cable 70B by operating the operation lever 70A, the operation cable 70B, and the operation lever 70A operated by the driver. A switching operation portion 70E including 70C and a lever support bracket 70D that supports the operation lever 70 in a swingable manner is provided.
The rear final assembly 18 is a device connected to the left and right rear wheels 74 and 75 via a pair of left and right drive shafts 72 and 73 (only the reference numeral 72 on the front side is shown).

A bar handle 77 for steering the front wheels 68 and 69 is supported by a steering shaft 78, and the steering shaft 78 is rotated at the upper part by a cross pipe (not shown) passed to the front part of the left and right upper frames 33 and 34. The lower part is rotatably attached to a cross plate 79 that is freely attached and passed to the left and right front coupling frames 41 and 42.
The bar handle 77 and the steering shaft 78 described above are parts constituting the steering mechanism 80.

  In the figure, 81 is a radiator, 82 and 83 (only the reference numeral 82 on the front side) is a pair of left and right front cushion units, 84 is a fuel tank, 86 is a fuel pump, 91 is a front carrier, 92 is a front fender, and 93 is Body cover 94 is seat, 96 is a rear carrier, 97 is a swing arm for swingingly supporting the rear final assembly 16, 98 is a rear cushion unit passed to the rear upper frames 43 and 44 side and the rear final assembly 16 side, 101 is A rear fender 102 is a step floor.

  FIG. 2 is a side view showing the front final assembly and the driving force switching portion according to the present invention. The driving force switching portion 70 includes a support plate 131 attached to the rear portion of the front final assembly 18 and an end portion of the support plate 131. Is connected to the distal end portion of the inner wire 132 constituting the operation cable 70B, the wheel driving force switching lever 70C attached to the support shaft 133 provided on the front final assembly 18 side, and the operation cable. A return spring 105 made of a compression coil spring interposed between an end of 70B and a columnar member 146 described later, and a driving force interrupting portion 140 including a support shaft 133 are provided. In the state shown in the figure, the return spring 105 is in a compressed state, and an elastic force is generated to pull out the inner wire 132 from the operation cable 70B.

The operation cable 70 </ b> B includes an outer cable 141 and an inner wire 132 that is movably inserted into the outer cable 141.
The outer cable 141 has one end locked to a locking portion 142 provided on the support plate 131 and the other end attached to a lever support bracket 70D (see FIG. 1).

  The inner wire 132 has a bolt member 144 attached to the distal end portion thereof. The bolt member 144 is passed through the column member 146 and screwed to the nut member 147, and the column member 146 is provided on the wheel driving force switching lever 70C. By hooking on the end of the long hole 148, the inner wire 132 and the wheel driving force switching lever 70C are connected.

  3 is a cross-sectional view taken along line 3-3 of FIG. 2, and the front final assembly 18 is connected to the input side mechanism 151 connected to the front propeller shaft 17 (see FIG. 1) side, and integrally connected to the input side mechanism 151. The output side mechanism 152 is a final reduction device, and the input side mechanism 151 is provided with a lost motion mechanism, which will be described later, and the output side mechanism 152 is provided with a differential device (not shown). Reference numerals 66a and 67a denote shaft portions constituting the drive shafts 66 and 67, respectively.

  The input-side mechanism 151 includes a housing 156 including a housing body 153 and a housing cover 154 that covers one end of the housing body 153, a drive shaft 161 that is rotatably supported by the housing 156 via bearings 157 and 158, A coupling sleeve 162 that is splined to the drive shaft 161 and attached so as to be movable in the axial direction, and a fork 164 that moves the coupling sleeve 162 in the axial direction via connecting pieces 163 and 163 are provided.

  The drive shaft 161 includes an input shaft 166 connected to the front propeller shaft 17 (see FIG. 1) side, and an output shaft 167 arranged so that the axis line coincides with the input shaft 166, and has a small diameter at the end of the input shaft 166. A convex portion 166 a is formed, a fitting hole 167 a is formed at the end of the output shaft 167, and a small-diameter convex portion 166 a is rotatably fitted to the fitting hole 167 via a needle bearing 168.

The input shaft 166 is a member formed with a male spline 166 b that is coupled to a spline 162 a that is formed on the coupling sleeve 162.
The output shaft 167 forms a male spline 167b that is coupled to the female spline 162a of the coupling sleeve 162, and is rotatably fitted to the small bevel gear 167c and the fitting recess 153a of the housing body 153 via a needle bearing 169 at the tip. This is a member formed integrally with a small-diameter convex portion 167d to be joined.

  The coupling sleeve 162, the connecting pieces 163 and 163, and the fork 164 described above are members that constitute a part of the driving force interrupting portion 140 that transmits driving force from the input shaft 166 to the output shaft 167 or interrupts the driving force. The driving force interrupting section 140 is provided with a lost motion mechanism which will be described later.

  Here, 171 is a bolt for attaching the housing cover 154 to the housing body 153, 172 is a retaining ring for fixing the bearing 157 to the housing cover 154, 173 is a retaining ring for fixing the bearing 157 to the input shaft 166, and 174 is the housing of the bearing 158. A lock nut fixed to the main body 153, a position detection switch 176 for detecting the position of the coupling sleeve 162 via the fork 164, a bolt 178 for attaching the support plate 131 to the housing cover 154, and an oil seal 178.

  The driving force interrupting section 140 described above connects the input shaft 166 and the output shaft 167 to the engine 12 (see FIG. 1) side, which is a driving source, and the left and right front wheels 68 and 69 (see FIG. 1). Are connected to each other so that the front wheels 68 and 69 and the left and right rear wheels 74 and 75 (see FIG. 1) are driven, and the input shaft 166 and the output shaft 167 are disconnected. This is a mechanism for cutting off the connection between the engine 12 side and the front wheels 68 and 69 to drive only the rear wheels 74 and 75, ie, switching between a four-wheel drive state and a two-wheel drive state.

FIG. 4 is a front view showing a driving force interrupting portion according to the present invention, and corresponds to a cross section taken along line 4-4 shown in FIG.
The driving force interrupting section 140 includes a support shaft 133 that is rotatably attached to the housing cover 154, a fork 164 that is swingably attached to the support shaft 133, and a first swing side of the fork 164 (that is, the input shaft 166 ( 3) and the output shaft 167 (see FIG. 3), the plate portion 183a is disposed on the swinging side of the fork 164 that moves the coupling sleeve 162), and is integrally attached to the support shaft 133. A stopper member 183, a collar 184 attached to the end of the support shaft 133, and a notch 184a provided in the collar 184, with one end 186a hung and the other end 186b hung on the front surface 164a of the fork 164, are supported. The first torsion coil spring 186 fitted to the shaft 133 and the back surface of the plate portion 183a of the stopper member 183 The second torsion coil spring 187 fitted to the support shaft 133 so that the end portion 187a is hooked and the other end portion 187b is brought into contact with the inner wall surface 154a of the housing cover 154, and the aforementioned wheel drive attached to the end portion of the support shaft 133 The switching lever 70 </ b> C, the aforementioned connecting pieces 163 and 163, and the coupling sleeve 162 are included.

The connecting piece 163 includes a rectangular piece 163 a that is inserted into an outer peripheral annular groove 162 b provided on the outer peripheral surface of the coupling sleeve 162, and a shaft portion 163 b that extends integrally from the rectangular piece 163 a, and the shaft portion 163 b rotates to the fork 164. It is attached freely.
The fork 164 includes a first arm 164d and a second arm 164e that support the connecting pieces 163 and 163.

  Here, 154b and 154c are shaft support holes formed in the housing cover 154 to support the support shaft 133 or the collar 184, and a plurality of 154e are bolts that fasten the housing body 153 (see FIG. 3) and the housing cover 154. Bolt insertion holes for passing 171 (see FIG. 3), 154 f and 154 f are knock holes for inserting knock pins for positioning the housing body 153 and the housing cover 154, and 164 b are opened in the fork 164 to pass the support shaft 133. A shaft insertion hole, 164c is a protruding piece provided integrally with the first arm 164d so as to contact the detector 176a of the position detection switch 176 when the fork 164 swings, and 183b is integrated with the stopper member 183 and the plate portion 183a. The provided flange portion 191 is a fork 1 with respect to the support shaft 133. A bolt for restricting the axial movement of the 4.

FIG. 5 is a side view showing the positional relationship between the fork and coupling sleeve of the driving force interrupting portion and the wheel drive switching lever according to the present invention.
The first arm 164d of the fork 164 is a portion extending substantially downward from the support shaft 133, and the connecting piece 163 provided at the tip of the first arm 164d is inserted into the outer peripheral annular groove 162b of the coupling sleeve 162. In the figure, the wheel driving force switching lever 70C is drawn with imaginary lines.

  The second torsion coil spring 187 is a member in which one end 187 a is hooked on the back surface 183 c of the stopper member 183 and the other end 187 b is applied to the inner wall surface 154 a of the housing cover 154. The second torsion coil spring 187 can urge the first arm 164d and thus the fork 164 clockwise in the drawing.

Next, the operation of the driving force interrupting section 140 described above will be described.
FIG. 6 is a first action diagram showing an action when the wire according to the present invention is pulled.
When the driver operates the operation lever 70A (see FIG. 1) and pulls the inner wire 132 as indicated by an arrow A in FIG. 6, the columnar member 146 switches the wheel drive via the bolt member 144 and the nut member 147. In order to pull the lever 70C, the wheel drive switching lever 70C swings as indicated by an arrow B around the support shaft 133 (the wheel drive switching lever 70C indicated by an imaginary line is the one before the swing). At this time, the return spring 105 is compressed as the columnar member 146 moves.

  When the wheel drive switching lever 70C swings, in FIG. 4, one end 186a of the first torsion coil spring 186 rotates together with the collar 184 provided on the support shaft 133, and the first torsion coil spring 186 is twisted. As a result, the other end 186 b of the first torsion coil spring 186 pushes the front surface 164 a of the fork 164, so that the fork 164 swings toward the first swing side with respect to the support shaft 133.

FIGS. 7A and 7B are second operation diagrams showing the operation when the wire according to the present invention is pulled.
In (a), the first arm 164d of the fork 164 swings to the first swing side as indicated by the arrow C, and the coupling sleeve 162 moves to the rear of the vehicle body as indicated by the white arrow in the figure. In FIG. 4, when the second arm 164e of the fork 164 hits the stopper piece 154h of the housing cover 154, the swing of the fork 164 stops, and in FIG. 7A, the first arm 164d and the coupling sleeve 162 are Stop at position.

  In (b), when the inner wire is further pulled and the support shaft 133 is further rotated via the wheel drive switching lever, the fork 164 remains stopped and the stopper member 183 fixed to the support shaft 133 is second twisted. It swings against the urging force of the coil spring 187.

FIG. 8 is a third action diagram showing the action when the wire according to the present invention is pulled.
As indicated by arrows E and E, when the coupling sleeve 162 moves, the coupling sleeve 162 is spline coupled to both the input shaft 166 and the output shaft 167, and is connected from the input shaft 166 to the output shaft 167 via the coupling sleeve 162. It becomes possible to transmit the driving force.

  Returning to FIG. 7B, the swing angle of the stopper member 183, that is, the angle α formed between the back surface 164 f of the first arm 164 and the front surface 183 d of the plate portion 183 a of the stopper member 183 is a lost motion angle. Even if the drive switching lever is swung, the fork 164 does not swing, that is, it does not affect the movement of the fork 164 (lost).

  As shown in FIG. 1, such a lost motion angle α is operated by operating an operation lever 70A for switching between four-wheel drive and two-wheel drive near the driver's seat of the vehicle, and via an inner wire of the operation cable 70B. When the wheel drive switching lever 70C is operated and the fork 164 is swung to move the coupling sleeve 162 as shown in FIG. 7A, each part of the operation system from the operation lever 70A to the coupling sleeve 162 is moved. In order to prevent the switching from the two-wheel drive to the four-wheel drive without the coupling sleeve 162 moving to a predetermined position due to the dimensional error, assembly error, inner wire extension, etc. In FIG. 7B, a large swing angle of the fork 164 is ensured so that the second arm 164e of the fork 164 reliably contacts the stopper piece 154h. In addition, even if the operation lever 70A is operated after the second arm 164e hits the stopper piece 154h, an excessive force is not applied to the operation system between the operation lever 70A and the fork 164. .

Next, the operation of the wire return structure described above will be described.
9 (a) and 9 (b) are operation diagrams showing the operation when the wire according to the present invention is returned.
When the driver operates the operation lever 70A (see FIG. 1) to return the inner wire 132 as indicated by an arrow F in FIG. 9A, for example, in FIG. 8, the coupling sleeve 162 from the input shaft 166 is used. When the driving force is being transmitted to the output shaft 167 via the shaft and the friction between the coupling sleeve 162 and the input shaft 166 and the output shaft 167 is large, it is difficult to move the coupling sleeve 162.

  9A, since the wheel drive switching lever 70C does not swing, the cylinder member 146 together with the bolt member 144 and the nut member 147 on the distal end side of the inner wire 132 is moved by the elastic force of the return spring 105. It moves without difficulty from within the long hole 148 of 70C with almost no constraint. Therefore, since the inner wire 132 returns without difficulty in the outer cable 141 according to the operation amount of the operation lever 70A, the operation cable 70B is not bent in the middle.

  In FIG. 8, the driving force transmitted from the input shaft 166 to the output shaft 167 via the coupling sleeve 162 is reduced or the driving force is lost, and the coupling sleeve 162 is interposed between the input shaft 166 and the output shaft 167. When the friction is reduced, the coupling sleeve 162 returns to the original output shaft 167 side. Therefore, as shown by the arrow G in FIG. 9B, the wheel drive switching lever 70C is moved to the first torsion coil spring 186 (see FIG. 4). ) And the second torsion coil spring 187 (see FIG. 4) elastically swings around the support shaft 133 and returns to the original position (position in FIG. 2).

  As described with reference to FIGS. 9A and 9B, by providing the wheel drive switching lever 70C with the elongated hole 148, even when the wheel drive switching lever 70C does not return when the inner wire 132 is returned, the inner wire The cylindrical member 146 provided at the distal end of 132 can be moved without difficulty in the long hole 148, and the inner wire 132 can be moved without difficulty within the outer cable 141 of the operation cable 70B. It is possible to prevent bending.

  As shown in FIGS. 1 and 2, the present invention firstly has an operation lever 70A operated by the driver, and a wheel drive switching lever that switches the wheel to a drivable state by operating the operation lever 70A. In the vehicle 10 including a drive switching unit 70 as a drive switching device including 70C and an inner wire 132 as a wire connecting the operation lever 70A and the wheel drive switching lever 70C, the wheel drive switching lever 70C includes: A long hole 148 is provided for urging the inner wire 132 to return when the operating lever 70A is returned to release the drivable state of the front wheels 68 and 69 as wheels.

  Thereby, when the inner wire 132 is returned by the operation lever 70A, the columnar member 146 provided at the end of the inner wire 132 is easily returned in the elongated hole 148, and an excessive force does not act on the inner wire 148, so that the inner wire 132 is in the middle. Can be prevented from bending. Therefore, there is no concern that the inner wire 132 interferes with other parts.

  Secondly, as shown in FIG. 4, the present invention has a first torsion coil spring 186 and a second torsion coil spring 186 as return springs that return the wheel drive switching lever 70C to the drive release side downstream from the wheel drive switching lever 70C. A torsion coil spring 187 is provided.

  Thereby, the wheel drive switching lever 70A can be easily returned by the first torsion coil spring 186 and the second torsion coil spring 187, and the driving of the front wheels 68 and 69 (see FIG. 1) can be smoothly released. Thus, the usability of the vehicle can be improved.

  In addition, although the wire return structure of this invention was applied to the drive switching device, you may apply not only to this but to a diff lock device.

  The wire return structure of the present invention is suitable for a vehicle including a drive switching device that switches between two-wheel drive and four-wheel drive.

It is a side view of the vehicle which employ | adopted the wire return structure which concerns on this invention. It is a side view which shows the front final assembly and drive force switching part which concern on this invention. FIG. 3 is a sectional view taken along line 3-3 in FIG. 2. It is a front view which shows the driving force interruption part which concerns on this invention. It is a side view which shows the positional relationship of the fork and coupling sleeve of a driving force interruption part which concerns on this invention, and a wheel drive switching lever. It is a 1st operation | movement figure which shows an effect | action when the wire which concerns on this invention is pulled. It is a 2nd operation | movement figure which shows an effect | action when the wire which concerns on this invention is pulled. It is a 3rd operation | movement figure which shows an effect | action when the wire which concerns on this invention is pulled. It is an operation | movement figure which shows an effect | action when the wire which concerns on this invention is returned.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Vehicle, 68, 69 ... Wheel (front wheel), 70 ... Drive switching device (drive switching part), 70A ... Operation lever, 70C ... Wheel drive switching lever, 132 ... Wire (inner wire), 148 ... Long hole, 186 187 ... Return spring (first torsion coil spring, second torsion coil spring).

Claims (2)

Drive switching including an operation lever operated by the driver, a wheel drive switching lever that switches the wheel to a driveable state by operating the operation lever, and a wire that connects each of the operation lever and the wheel drive switching lever In a vehicle equipped with a device,
A wire return structure for a vehicle, wherein the wheel drive switching lever is provided with an elongated hole for urging the wire to return when the operation lever is returned to release the wheel drivable state.   The wire return structure for a vehicle according to claim 1, further comprising a return spring that returns the wheel drive switching lever to the drive release side downstream of the wheel drive switching lever.

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