JPH0321555A - Runout device for vehicle in one-wheel slipping - Google Patents

Abstract

PURPOSE:To facilitate running-out when one of the drive wheels is in slippage by leading the operating force for a parking brake device to a pair of rear cables through an equalizer, and hindering the braking motion of either of these rear cables selectively. CONSTITUTION:When one for ex. 15 of a left and a right drive wheel 15, 16 slips due to racing, etc., the operating rod 9 of that 17 of a pair of hindering means 17, 18 on the drive wheel 16 side is intruded and held in the position, and the tip of this operating rod 9 is protruded in front of the area around the connection part of a rear cable 6 on the brake device 8 side of the drive wheel 16. Then a parking brake lever 1 is pulled up to pull the inner cable 3a of a front cable 3, and thereby an equalizer 4 is turned round the operating rod 9 to pull only the inner cable 5a of a rear cable 5. Thus a brake device 7 for the drive wheel 15 in slippage is actuated to suppress slippage of the drive wheel 15, which should allow easier running-out.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to an escape device when one wheel of a vehicle is idling.

[Conventional technology]

As a conventional escape device when one wheel of a vehicle is idling, there is, for example, a limited slip differential gear (Automobile Engineering Complete Book 9 Power Transmission Device, p. 323, November 20, 1980, published by Sankaido). This involves engaging a V-shaped groove formed in the differential gear case with a convex V-shaped cam surface formed at the end of the pinion mate shaft, and connecting the differential gear case and side gears. A pair of multi-disc clutch mechanisms are provided between them, and a pressure ring is interposed between the pinion mate rotatably supported by a pinion mate shaft and the pair of multi-disc clutch mechanisms.

However, if the vehicle attempts to drive on a road surface with a low coefficient of friction, such as a muddy or frozen road, and one of the drive wheels spins,
The pinion mate shaft, which is receiving reaction from the drive wheel, moves slightly based on the engagement between the V-shaped groove and the convex V-shaped cam surface, thereby connecting the multi-disc clutch mechanism. As a result, one of the fast-rotating side gears drives the differential gear case, and its driving torque is applied to the other slow-rotating side gear, thereby suppressing the idling of one wheel.

[Problem to be solved by the invention]

However, the structure of this type of conventional escape device when one wheel of a vehicle is idling is extremely complicated and expensive.
It was not possible to easily equip the vehicle with it. [Means for Solving the Problems] The present invention has been made in view of such conventional i1B, and its structure includes a front cable connected to an operating device of a parking brake device, and a front cable connected to the front cable. It is equipped with a pair of rear cables that are branched and connected via an equalizer, and a braking device for the driving wheels that is connected to each rear cable, so that the braking operation of either one of the pair of rear cables can be selectively prevented. This is an escape device when one wheel of a vehicle is idling, which is provided with a removable blocking means on the equalizer or the stopper portion of the pair of rear cables.

[Effect]

If the vehicle is traveling on a road surface with a low coefficient of friction, such as a muddy or frozen road, and one of the drive wheels becomes idling, the other prevention means is selectively activated to prevent the idling wheel from spinning. Generates appropriate braking force to the drive wheels. That is, the blocking means on the other drive wheel side that is not idling is activated and engaged with the equalizer or the stopper portions of the pair of rear cables. Next, operate the parking brake lever or other operating device. This causes the front cable to be pulled, transmitting the pulling force to the equalizer, and applying equal pulling force to the pair of rear cables. However, the braking action of the other rear cable is blocked by the blocking means that engages with the stopper portion, and only one rear cable is subjected to pulling motion.

As a result, the brake device of one of the driving wheels that is spinning is operated for braking, and the spinning is suppressed. As a result, the driving force of the engine is transmitted to the other drive wheel via the differential gear device, allowing the vehicle to escape from muddy roads, frozen roads, etc.

When the vehicle escapes from the muddy or icy road, release the locking of the blocking means.

〔Example〕

Examples of the present invention will be described below with reference to the drawings. 1 to 4 show a first embodiment of the invention.

In FIG. 2, reference numeral 1 indicates a parking brake lever which is an operating device for the parking brake device, and is swingably supported by a bin 2 on the vehicle body 13. This parking play kicker 1
One end of an inner cable 3a of one front cable 3 is connected to one end, and the other end of this inner cable 3a is connected to the center of the equalizer 4. Further, one end of inner cables 5a, 6a of the rear cable 5.6 is connected to both ends of the equalizer 4, and the other end of each inner cable 5a, 6a is connected to the left and right drive wheels 15, 16, respectively. Brake device 7
．． 8 (drum brake or disc brake with parking brake device). Therefore, when the grip part 1a of the parking brake lever 1 is pulled up and swung around the pin 2, the inner cable 3a of the front cable 3 is pulled, and the inner cable 5a of the pair of rear cables 56 is pulled through the equalizer 4. ,6
Since each brake is applied to a, both brake devices 7.8
is operated as a parking brake. The equalizer 4 has the function of branching the front cable 3 into a pair of rear cables 5 and 6 and equally transmitting the attractive force of the front cable 3 to each rear cable 5 and 6. This braking operating state is maintained by a ratchet device built into the parking brake repper 1.

In the vicinity of the equalizer 4, detachable blocking means 17 and 18 are respectively provided that can selectively block the braking operation of either one of the pair of rear cables 5.6. These blocking means 17, 18 are of the same construction,
It has an operating rod 9 provided on the front side of the equalizer 4, that is, on the front cable 3 side. Each operating rod 9 is provided at both end portions 4a and 4b, which serve as stopper portions of the equalizer 4, with a slight spacing therebetween, and has an operating portion 9a at the upper end, as shown in FIG. 1.3. A slidable operating member 10.11 is symmetrically integrated into the operating part 9a, and the operating member 10.11 includes:
Each of the operating pieces 10a11a at the inner end is biased outward by a spring 12 compressed and interposed between them, and when the operating rod 9 is pushed into the operating position as shown in FIG. comes into contact with the side wall of the operation part 9a, and the locking claws 10b and llb at the outer end lock into the upper wall of an annular recess 13b formed at the lower end of the hole 13a of the vehicle body l3, thereby maintaining the operating position. ．． The operating portion 9a of the operating rod 9 and the hole 13a of the vehicle body l3
A spring 14 is compressed and interposed between the spring seam 13C and the spring seam 13C formed at the lower end of the spring 13C, which urges the operating rod 9 to return. When the operating rod 9 is not in operation, it returns upward under the elastic force of the spring 14 as shown in FIG. It has stopped. In addition, a switch SW is provided which is turned ON when the operating rod 9 is pushed into the operating position, and a warning device (not shown) is used to give a warning to the driver. If the vehicle attempts to drive on a road surface with a low coefficient of friction such as a muddy or frozen road, or if the vehicle runs off the road into a ditch, for example, if one of the drive wheels 15 is spinning, the other drive wheel 15 is activated.
7 is selectively activated, and one drive wheel 15 is idling.
Appropriate braking force is applied to the That is, if the operating rod 9 corresponding to the other drive wheel l6 that is not idling is pushed against the elastic force of the spring l4, the locking claws iob and ttb are respectively moved by the spring 12 as shown in FIG. Since it protrudes and locks onto the upper wall of the recess 13b of the vehicle body l3,
held in the working position. As a result, the tip of the operating rod 9 protrudes forward near one end 4b which is the stopper portion of the equalizer 4, that is, the connection end of the rear cable 6 that connects to the brake device 8 of the other drive wheel 16 that is not idling. .

Next, when the grip part 1a of the parking brake lever 1 is pulled up and swung around the pin 2, the inner cable 3a of the front cable 3 is pulled and the pulling force is transmitted to the equalizer 4, but the equalizer 4 is not connected to the protruding operating rod. 9, the normal braking operation of the equalizer 4 is prevented,
The equalizer 4 rotates around the operating rod 9 as a fulcrum. Therefore, only the inner cable 5a of one of the rear cables 5 is pulled, and the braking device 7 of one of the driving wheels 15 that is idling is activated to suppress the idling. As a result, the driving force of the engine is transmitted to the other drive wheel l6 via a differential gear device (not shown), allowing the vehicle to escape from muddy roads, frozen roads, and the like.

On the other hand, the operating state of this blocking stage 17 is detected by turning on the switch SW, and is notified to the driver by an alarm device consisting of a lamp, a buzzer, a sound generator, etc. (not shown).
Therefore, normal running with the blocking means 17, 18 activated is prevented.

If the vehicle escapes from a muddy or icy road, stop it by 1,000 steps.
7 is deactivated. That is, the distance between the operating pieces 10a and 1la of the operating member 10.11 of the operating rod 9 is reduced against the elastic force of the spring 12, and the locking claws iob,
ttb is released from the upper wall of the recess 13b, and the operating rod 9 is returned to its original position by the elastic force of the spring l4. As a result, the enlarged diameter portion 9b at the lower end of the operating rod 9 is engaged with the lower surface of the hole 13a of the vehicle body 13, and the operating rod 9 returns to a non-operating state, that is, a state in which it cannot engage with the equalizer 4.

A second embodiment of the invention is shown in FIGS. 5-7.

In this embodiment, the rear cable 25 is composed of a single cable, and the center portion of the rear cable 25 is slidably inserted into the equalizer 24, which is a U-shaped cylindrical body. This constitutes a pair of rear cables 25 that extend rearward and substantially parallel. An inner cable 23a of the front cable 23 is connected to the center of the equalizer 24.

When the parking brake lever (not shown) is pulled up, the inner cable 23a of the front cable 23 is pulled and the equalizer 24 is pulled, so the inner cables 25a on both sides of the rear cable 25 are pulled, and both brakes are pulled. Device 278 28 is activated.

In the vicinity of the equalizer 24, detachable blocking means 17 and 18 for selectively blocking the braking action of both ends of one rear cable 25 are provided. This blocking means 1
7.18 has a pair of stops 30, and the pair of stops 30 are located in front of a pair of stoppers 29.29 fixed to the inner cable 25a of the rear cable 25 extending substantially in parallel. It can be freely engaged and disengaged from each stopper 29 and 29 during braking operation. As shown in FIG. 5, the stopper 30 is fixed to the vehicle body l3 and includes a stop member 32 having a relatively shallow recess 32a, a swinging lever 34 supported on the vehicle body l3 so as to be able to rotate freely, and a swinging lever 34. The concave portion 3 of the stopper member 32
2a and a stop member 33 having a corresponding recess 33a. The corner lever 34 is connected to both opposing stop members 32 and 33 by a spring 35 stretched between it and the vehicle body l3.
are urged to swing away from each other, and are locked in a normally inactive state to a regulating member 36 protruding from the vehicle body 13. In addition, a gripping hole 34b is formed in the gripping portion 34a formed at the upper end of the seeding lever 34, and a locking hole 34b is formed in the vehicle body l3 located above the stopper member 32. A hook 37 made of spring material and having an L-shape so that the tip is inserted and latched.
is permanently installed. Note that the state in which both the opposing stop members 32 and 33 are engaged and the hook 37 is inserted and locked into the locking hole 34b of the swing lever 34 is detected by the switch SW, and the lamp is turned on or the buzzer is sounded. It is designed to activate the alarm system outside. When the vehicle is traveling on a road surface with a small coefficient of friction such as a muddy or frozen road, and one of the drive wheels 38 is spinning, the other blocking means 17 is selectively activated to stop the wheel that is spinning. Appropriate braking force is generated at the drive wheels 38. That is, the spring 3 is gripped by gripping the gripping portion 34a corresponding to the other driving wheel 39 that is not idling.
The tz-movement lever 34 is swung against the elastic force of 5, the hook 37 is inserted and latched into the latching hole 34b, and the opposing stop members 32 and 33 are engaged, as shown in FIG. The inner cable 25a of the rear cable 25 is connected to a pair of stop members 3.
2. Confined between 33 opposing recesses 32a and 33a. Next, when a parking brake lever (not shown) is moved, the inner cable 23a of the front cable 23 is pulled, transmitting the pulling force to the equalizer 24, and applying equal pulling force to the substantially parallel inner cable 25a of the rear cable 25. However, since the stopper 29 of the other inner cable 25a cannot pass between the opposing recesses 32a and 33a, it is not sufficiently pulled, and only one inner cable 25a is pulled. As a result, the brake device 27 of one of the driving wheels 38 that is spinning is operated to brake the wheel, thereby suppressing the wheel spinning. As a result, the driving force of the engine is transmitted to the other drive wheel 39 via a differential gear device (not shown), allowing the vehicle to escape from muddy roads, frozen roads, etc. The operating state of this blocking means 17.18 is
Detected when the switch SW is turned on, a lamp (not shown),
The driver is notified by a warning device such as a buzzer. If the vehicle escapes from a muddy or icy road, preventive measures 1
7. Cancel the operation of 18. That is, by grasping the gripping portion 34a and swinging the swinging lever 34 to release the latching between the hook 37 and the latching hole 34b, the swinging lever 34 can be moved as follows.
Due to the elastic force of the spring 35, the stopper 29 returns to its original position until it is engaged with the regulating member 36, and the opposing recesses 32a,
The engagement enabled state with 33a is released.

(Effects of the Invention) As understood from the above explanation, according to the present invention, when one of the driving wheels is idling, an appropriate braking force is generated only on one of the idling driving wheels, and the braking force is generated on the other driving wheel that is not rotating. Since driving force can be generated in the drive wheels, the vehicle can be escaped from a road with a low coefficient of friction such as a muddy road or an icy road using an escape device having a simple and inexpensive structure.

[Brief explanation of the drawing]

1 to 4 show a first embodiment of the present invention, FIG. 1 is a front view shown in cross section, FIG. 2 is a plan view showing the wiring relationship of the brake cable, and FIG. 3 shows the operating rod. A side view, FIG. 4 is an explanatory view of the operation, FIGS. 5 to 7 show a second embodiment of the invention, FIG. 5 is a side view partially shown in cross section, and FIG. A plan view showing the relationship and FIG. 7 are action explanatory views. l: Parking brake lever (operation device 'It). 3: Front cable, 4: Equalizer, 4a, 4b: End part (stopper part), 5, 6: Rear cable. 7.8: Brake device, 9: Operation rod, l3: Vehicle body, 15, 16: Drive wheel, 17, to: Blocking means 23: Front cable, 24
: Equalizer, 25: Rear cable, 27.28: Brake device 29: Stopper (stopper part), SO: Stopper 32.33: Stopping member, 32a, 33a: Recess 34:
Swing lever, 37: Hook, 3B, 39: Drive wheel, SW
:switch.

Claims (1)

[Claims] (1) A front cable connected to the operating device of the parking brake device, a pair of rear cables branched and connected to the front cable via an equalizer, and a drive wheel brake device connected to each rear cable. When one wheel of a vehicle is idling, the equalizer or the stopper portion of the pair of rear cables is provided with a removable blocking means so as to selectively block the braking operation of either one of the rear cables. escape device.