RU2198109C2 - Automobile self-recovering device - Google Patents

Abstract

FIELD: transport engineering. SUBSTANCE: device with grouser comprises power body capable of moving along two guides, length up to 3 m. Bayonet-type catch, device releasing and lowering bayonet-type catch with control handle and T-shaped projections to thrust bayonet-type catch at self-recovery are mounted on body. Body is connected at two side by means of roller chain passing over two sprockets. Rear sprocket is driven one, being installed on shaft of worn reduction gear with low- speed reversible DC motor. Limit switches are installed on ends of guides. EFFECT: improved cross-country capacity of automobile. 3 cl, 2 dwg

Description

1. The technical field to which the invention relates.
The invention relates to the automotive industry, in particular to devices for self-extraction of a car when hit on the ground with low bearing capacity.

2. The level of technology
There are various devices for self-extracting a car, based on the use of wheel chains, cable drums, mounted on wheel disks, drive winches installed next to the engine compartment, etc.

 The closest prototype is the application of the Russian Federation for the invention 97114378/28 with priority 05.08.97 (Schlepper Y.A.), which uses a lug with a ratchet mechanism and a recoil device in the form of a ski.

The main disadvantages of many known devices are:
- the need to exit the cab to prepare the device for operation;
- the presence in the place of a forced stop of trees, stumps and other supporting objects.

 The objective of the invention is the creation of such an autonomous device that would allow, without leaving the cab and without using supporting objects, to overcome marshy, sandy and snowy places along the route.

3. The invention
Schematic diagram of the device shown in figure 1.

 It consists of a power casing 1, sliding along guides 2 attached to the car body, the length of which determines the distance of pulling out in one pass of the power casing. Mounted on the body: bayonet hook 3, device 4 for undocking and lowering the bayonet hook, controlled by the handle 5 from the cab. The housing has a protrusion 6 for emphasis bayonet hook when pulled out.

The housing is connected on both sides by an annular roller chain 7, covering sprockets 8 and 9, the sprocket 8 being driven and mounted on the shaft of the worm gear 10 with a reversible DC motor 11. Limit switches 12 are installed at the ends of the guides 2
The placement of the self-extractor on the car is shown in figure 2. It is installed in a special gorgrot, equipped in the back of a car.

 The device operates as follows.

 When hit on the ground with low bearing capacity, the car plunges into the ground and needs an extraneous pulling force to pull it out to overcome this obstacle or move to the side.

 Without leaving the cab, with the handle 5, disconnect the power housing 1 from the handle and at the same time lower the bayonet hook 3 to the ground, turn on the electric motor 11 and, using the worm gear and chain transmission, consisting of sprockets 8 and 9 and the roller chain 7, pull the power housing 1 back, while the bayonet hook 3 cuts into the ground and the car begins to slowly move forward until the power housing 1 rests against the rear limit switches 12. The engine 11 enters the reverse mode and the power housing starts moving forward, when this bayonet hook is pushed out of the ground and, sliding on it, returns to its original position. In one power stroke, the car advances 3 m forward and then the procedure is repeated until the vehicle enters the ground with high bearing capacity.

Example
We take an SUV with a total weight of 2.5 tons. We take the coefficient of friction of the wheels on the ground equal to 0.5.

 For self-extraction, a traction force of 1.25 tons is required.

 We take the length of pulling in one stroke of the bayonet hook equal to 3 m and the speed of advancement in the process of self-extraction equal to 1 m in 2 minutes, i.e. 0.008 m / s.

 The required motor power will be 100 watts, i.e. It uses the power of a car generator running in a buffer with a battery.

 With an asterisk diameter of 4 cm in one revolution, the advancement of the car will be 12 cm.

 To overcome the distance of 3 m will require 25 revolutions. Since the pulling time in one stroke is 6 minutes, the worm gear should provide 4-5 revolutions of the sprocket per minute, while its gear ratio when using a low-speed reversible DC motor should be 300-400.

4. List of figures
Figure 1 is a schematic diagram of the design of a device for self-extraction of a car.

 Figure 2 - diagram of the action of the device for self-extraction of the car.

Claims (3)

 1. Self-extractor of a car with a grouser, characterized in that it consists of a power housing that can move along two guides up to 3 m long, with a bayonet hook, a device for uncoupling and lowering the bayonet hook with a control handle and T-shaped protrusions to stop the bayonet hook when pulling out, the housing is connected on both sides by a roller chain covering two sprockets, the rear sprocket being driven and mounted on the shaft of the worm gear with slow speed p versivnym DC motor, and mounted on the ends of guide limit switches.  2. The car self-extractor according to claim 1, characterized in that a regular car generator with a capacity of up to 100 W in a buffer with a standard battery is used as a power source for the drive electric motor.  3. The car self-extractor according to claim 1, characterized in that the gear ratio of the worm gear should be 300-400.

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