JP2015009639A - Air brake system of combination vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To actuate a service brake and an emergency brake of a combination vehicle only with an air brake system on a combination vehicle side.SOLUTION: A combination vehicle A is provided with: an air tank 2 which accumulates the air to be used for brake of the connection vehicle A to be towed by a tow car B; an air brake device 3 which brakes the connection vehicle A by pneumatic pressure of the air tank 2; a relay emergency valve 4 which supplies the pneumatic pressure of the air tank 2 to the air brake device 3; a service line 5 and an emergency air supply line 6 plumbed so as to extend over the air tank 2 and the relay emergency valve 4; an emergency line 7 plumbed so as to extend over the tow car B and the relay emergency valve 4; and a connection part 10 which connects the emergency line 7 so as to be attachable/detachable to the tow car B and to open the emergency line 7 in non-connection.

Description

  The present invention relates to an air brake system for a connected vehicle towed by a tow vehicle.

  This is an air brake system that activates the brakes of a connected vehicle such as a trailer that is towed by a tow vehicle such as a tractor. 2. Description of the Related Art An air brake system that automatically operates a brake on a connected vehicle side when disconnected is known.

  In the one disclosed in Patent Document 1 below, a service line and an emergency line connected to the tow vehicle side are connected to a port of a relay emergency valve, and the air pressure (signal pressure) from the brake valve on the tow vehicle side is serviced. When the relay emergency valve is connected via the line, the valve supplies air in the air reservoir to the brake line according to the air pressure, and the relay emergency valve is connected to the connected vehicle if the emergency line is disconnected or damaged. It is designed to function as an emergency brake.

  Although not shown in Patent Document 1, normally, the air pressure from the tow truck side is supplied from an air tank provided on the tow truck side as described in Patent Document 2 below. It has become.

JP-A-6-92216 Japanese Patent Laid-Open No. 9-39776

  According to the prior art of Patent Document 1, when the tow vehicle and the connected vehicle are separated due to an accident and the emergency line is disconnected or damaged, it functions to apply an emergency brake to the connected vehicle. Major accidents such as collisions and falls can be prevented.

  However, in a connected vehicle equipped with the air brake system of the prior art disclosed in Patent Document 1, air pressure is supplied to the connected vehicle and the brake on the connected vehicle is operated. Since an air outlet for connecting the air tank on the vehicle side and further the service line and the emergency line is required, there is a problem that it cannot be used for a tow vehicle that does not have the air tank or the air outlet.

  In particular, when the tow vehicle is a general tractor, there is no air tank or air outlet, so there is a problem that the connected vehicle cannot be connected and operated in a situation where braking is required for the connected vehicle. In order to solve this problem, it is necessary to prepare a tractor equipped with an air tank and an air outlet, or to modify the existing tractor by attaching an air tank and an air outlet. There was a problem of compelling costs.

  This invention makes it an example of a subject to cope with such a problem. That is, it is possible to operate the service brake and emergency brake of the connected vehicle only with the air brake system on the connected vehicle side, thereby enabling connection to an existing towing vehicle not equipped with an air tank or an air outlet, It is an object of the present invention to newly prepare a tractor provided with an air take-out port, or to eliminate the need to modify an existing tractor to attach an air tank or air take-out port.

  In order to achieve such an object, an air brake system for a connected vehicle according to the present invention comprises at least the following configuration.

  An air brake system provided in a connected vehicle towed by a tow vehicle, wherein an air tank that stores air used for braking the connected vehicle, an air brake device that brakes the connected vehicle by air pressure of the air tank, and the air tank A relay emergency valve that supplies the air pressure to the air brake device, a service line and an emergency air supply line that are piped across the air tank and the relay emergency valve, and a range that extends between the towing vehicle and the relay emergency valve. An emergency line that is piped to the towing vehicle, and a connection part that connects the emergency line so as to be airtight and detachable, and connects the emergency line so as to open when disconnected. And an air brake system of the vehicle combination.

1 is a schematic configuration diagram illustrating a first embodiment of an air brake system for a connected vehicle according to the present invention. In FIG. 1, it is a schematic action figure which shows the operating state of a service brake. In FIG. 1, it is a schematic operation | movement figure which shows the operating state of an emergency brake. It is a schematic block diagram which shows 2nd embodiment of the air brake system of the connection vehicle which concerns on this invention. In FIG. 4, it is a schematic operation | movement figure which shows the operating state of an emergency brake. It is a schematic block diagram which shows 3rd embodiment of the air brake system of the connection vehicle which concerns on this invention.

  In the present invention, it is preferable that the connected vehicle further includes an air supply device that supplies air to the air tank.

  Further, it is preferable that one end of the emergency line is connected to the air tank and an air supply device is connected to the emergency line.

  In addition, a check valve is provided in the emergency line on the air tank side and relay emergency valve side with the air supply device as a boundary, and the air supplied to the air tank and the emergency line flows back in the direction of the air supply device. It is preferable to arrange in a direction that does not.

  A tow vehicle described below is a tractor, a truck, or the like that can be connected to a connected vehicle and that is self-propelled by power. It does not matter whether there is an air tank and an air outlet that are part of a conventional air brake system.

  The connected vehicle described below is various trailers that are connected to a tow vehicle and travel with the traveling of the tow vehicle. In such a trailer, a transport vehicle that transports various transport items such as agricultural products, or Agricultural machines that perform various types of agricultural work by using power extracted from the towing vehicle, and also a camping trailer are included.

  The service line described below is for supplying air pressure for operating the brakes of the connected vehicle to the emergency valve by a brake operation on the towing vehicle side. Hereinafter, a brake that operates by supplying air pressure to the emergency valve from the service line is referred to as a service brake (normal brake).

  The emergency air supply line described below is used to supply the emergency valve with air pressure for operating the brakes of the connected vehicle regardless of the brake operation on the towing vehicle when the air pressure in the emergency line drops. Is. Hereinafter, a brake that operates by supplying air pressure from an emergency air supply line to an emergency valve is referred to as an emergency brake (emergency brake).

  The emergency line described below is a system in which air of a predetermined pressure is supplied into the emergency line in a state where it is piped between the towing vehicle and the relay emergency valve, and this air pressure is supplied to the relay emergency valve. When the connection to is released, air is released and the supply of air pressure to the relay emergency valve is stopped.

  The relay emergency valve described below stops the supply of air pressure from the emergency air supply line to the air brake device by the air pressure from the emergency line and supplies only the air pressure supplied from the service line to the air brake device. When the air pressure from the emergency line is less than a predetermined pressure, the air pressure from the emergency air supply line is supplied to the air brake device.

  Hereinafter, the structure of 1st embodiment of the air brake system 1 of the connection vehicle A which concerns on this invention is demonstrated based on FIGS. 1-3. FIG. 1 is a schematic configuration diagram of the air brake system 1, FIG. 2 shows a service brake operation state by a brake operation on the towing vehicle B side, and FIG. 3 operates in an emergency when the connected vehicle A is separated from the towing vehicle B. Indicates emergency brake operation status. In FIGS. 2 and 3, the portion indicated by the thick line is a state in which air pressure is acting. Note that the first to third embodiments described below do not limit the present invention.

  The connected vehicle A is connected to the towing vehicle B and travels as the towing vehicle B travels. The air brake system 1 brakes the connected vehicle A in conjunction with the brake operation on the towing vehicle B side. , A connecting portion (not shown) connected to the towing vehicle B, a cargo bed (not shown), wheels A1 and the like.

  The towing vehicle B is self-propelled by power and travels by operating various control devices (brake, accelerator, clutch, transmission, steering, etc. (not shown)) provided in the driver's seat (not shown). To do. Moreover, it is wired so that electric power may be supplied with respect to the connection vehicle A and the air brake system 1 from the battery (not shown) with which the tow vehicle B was equipped.

  The air brake system 1 includes an air tank 2 that stores air used for braking the connected vehicle A, an air brake device 3 that brakes the rotation of the wheel A1 by the air pressure of the air tank 2, and the air pressure of the air tank 2 to the air brake device 3. The relay emergency valve 4 to be supplied, the service line 5 and the emergency air supply line 6 piped so as to extend over the air tank 2 and the relay emergency valve 4, and the relay emergency valve 4 from the air tank 2 through the connection 10. A piped emergency line 7 and an air supply device 8 connected to the emergency line 7 are provided.

  The air tank 2 is supplied with air from the air supply device 8 through the emergency line 7, and the air pressure in the air tank 2 is serviced according to the brake operation on the towing vehicle B side or the air pressure in the emergency line 7. The relay emergency valve 4 is supplied via a line 5 or an emergency air supply line 6. The air tank 2 is provided with a drain 20 so that moisture generated in the air tank 2 can be removed.

  The air pressure in the air tank 2 is monitored by a pressure switch 50 connected to the service line 5, and when the air pressure in the air tank 2 becomes less than a predetermined pressure, the pressure switch 50 is turned on and is equal to or higher than the predetermined pressure. Sometimes the OFF state is maintained.

  The pressure switch 50 is electrically connected to the air supply device 8, and the air supply operation of the air supply device 8 is started when the pressure switch 50 is turned on, and the air supply operation is stopped when the pressure switch 50 is turned off. .

  The air brake device 3 includes a brake body 30 that is connected to the relay emergency valve 4, an air chamber 31 that is connected to the brake line 30, and a brake main body that is switched between braking and brake release by the operation of the push rod 310 of the air chamber 31. 32. The brake body 32 is provided on an axle (not shown) of the wheel A1, and the rotation of the axle is braked / released by the push-in / out operation of the push rod 310.

  The relay emergency valve 4 is a service brake passage (not shown) for guiding air pressure from the service line 5 to the air brake device 3, and an emergency brake for guiding air pressure from the emergency air supply line 6 to the air brake device 3. In addition to a flow path (not shown), it is a well-known one having a switching valve 40 that opens and closes the emergency brake flow path according to the magnitude of air pressure from the emergency line 7.

  That is, when the air pressure from the emergency line 7 is a predetermined value, the aforementioned emergency brake flow path is closed, and only the air pressure supplied from the service line 5 based on the brake operation of the towing vehicle B is applied to the air brake. It supplies to the apparatus 3 and brakes the connection vehicle A (service brake (refer FIG. 2)). On the other hand, when the air pressure from the emergency line 7 is less than the predetermined value, the emergency brake passage is opened, and only the air pressure supplied from the emergency air supply line 6 is obtained regardless of the brake operation of the towing vehicle B. The brake is supplied to the air brake device 3 to brake the connected vehicle A (emergency brake (see FIG. 3)).

  A solenoid valve 51 that opens and closes the service line 5 is connected to the service line 5. The solenoid valve 51 is electrically connected so as to open and close in conjunction with a brake lamp (not shown) of the connected vehicle A that is turned on when the towing vehicle B is braked and turned off when the brake operation is released. ing.

  The solenoid valve 51 is opened and closed when the brake lamp is lit, the air pressure of the air tank 2 is supplied from the service line 5 to the relay emergency valve 4 and closed when the brake lamp is turned off. The supply of the air pressure to the relay emergency valve 4 is stopped.

  The emergency air supply line 6 controls the air pressure from the air tank 2 according to the magnitude of the air pressure supplied from the emergency line 7 to the relay emergency valve 4 regardless of the brake operation on the towing vehicle B side. It is independently piped so that it can be supplied to the air brake device 3 from the flow path.

  The emergency line 7 is detachably connected to the towing vehicle B via the connection portion 10, and the air pressure in the emergency line 7 is released when the connection is released.

  The emergency line 7 has a line 70 on the air tank 2 side and a line 71 on the relay emergency valve 4 side with the connection part 10 as a boundary, and these lines 70 and 71 are connected to the connection part 10 respectively. Thus, an emergency line 7 is provided so as to extend over the air tank 2 and the relay emergency valve 4.

  The line 70 is connected to an air supply device 8 and check valves 9A and 9B arranged on the air tank 2 side and the connection portion 10 side with the air supply device 8 as a boundary.

  The air supply device 8 is a compressor, and as described above, the operation / stop is switched by the ON / OFF of the pressure switch 50. The air supply device 8 is not limited to a compressor as long as it can supply air to the air tank 2 and the emergency line 7.

  The check valve 9A is connected in such a direction that the air pressure from the air supply device 8 is circulated only in the direction of the air tank 2 and the air pressure from the air tank 2 is not allowed to flow back to the air supply device 8 side. The check valve 9B is connected in such a direction that the air pressure from the air supply device 8 flows only in the direction of the relay emergency valve 4 and the air pressure from the direction of the relay emergency valve 4 does not flow back to the air supply device 8 side. .

  The connecting portion 10 is disposed so as to extend over the pipe portion 1A, one end side of the pipe portion 1A, and one end side of the line 70, and a pair of couplers 1B that detachably connect the line 70 to the pipe portion 1A. And a pair of couplers 1C, which are disposed so as to extend over the other end side of the pipe portion 1A and one end side of the line 71 and connect the line 71 to the pipe portion 1A so as to be detachable.

  The pipe portion 1A can be retrofitted and fixed to the towing vehicle B by an attachment fitting or the like (not shown). By fixing the pipe portion 1A to the towing vehicle B, the connected vehicle A can be connected from the towing vehicle B. When detached, the coupler 1B and 1C can be reliably separated without the entire connecting portion 10 being detached from the towing vehicle B, and thus the emergency line 7 can be opened (see FIG. 3).

  By connecting the emergency line 7 with such a connecting portion 10, the air pressure of the emergency line 7 can be maintained in the connected state, and the service brake can be reliably operated by the brake operation on the towing vehicle B side ( (See FIG. 2). Further, by opening the emergency line 7 in the disconnected state, the emergency brake can be reliably operated regardless of the brake operation on the towing vehicle B side (see FIG. 3).

  The initial setting when connecting the connecting vehicle A to the towing vehicle B is to connect the connecting vehicle A and the towing vehicle B and connect the emergency line 7 to the connecting portion 10, and then the air supply device 8, the pressure switch 50, The solenoid valve 51 is energized, and air pressure is supplied from the air supply device 8 to the emergency line 7.

  The air pressure supplied to the emergency line 7 is supplied to the air brake device 3 from the aforementioned emergency brake flow path of the relay emergency valve 4, and the air brake device 3 brakes the connected vehicle A.

  The supply of air pressure from the air supply device 8 is continued by the pressure switch 50 until the air pressure in the air tank 2 reaches a predetermined value. When a predetermined value of air pressure is maintained in the emergency line 7 during the supply of air pressure from the air supply device 8, the emergency brake passage is closed and the relay emergency valve 4 communicating with the air brake device 3 is closed. The exhaust port (not shown) is opened and the air pressure supplied to the air brake device 3 is exhausted, whereby the initial setting can be performed.

  According to the air brake system 1 having such a feature, since all the components of the air brake system 1 including the air tank 2 are provided in the connected vehicle A, the service of the connected vehicle A only on the connected vehicle A side. Brake and emergency brake can be activated. As a result, it can be connected to an existing towing vehicle B that does not have an air tank or an air outlet, and a new towing vehicle B that has an air tank or an air outlet can be prepared or an air tank can be added to the existing towing vehicle B. And modification to install the air outlet is unnecessary.

  4 and 5 are flowcharts showing a second embodiment of an air brake system 1 'according to the present invention. In addition, about the site | part which overlaps with 1st embodiment, description is abbreviate | omitted by attaching | subjecting a same sign.

  The air brake system 1 ′ is a single line in which the emergency line 7 is piped so as to extend from the air tank 2 to the relay emergency valve 4 without passing through the connecting portion 10 ′. A connecting pipe 72 connected to the towing vehicle B via the connecting portion 10 ′ is piped.

  The connecting portion 10 ′ includes a closing portion 1 </ b> D that is fixed to the towing vehicle B side, and an engaging portion 1 </ b> E that is provided on the connecting pipe 72 and is connected to and disengages from the closing portion 1 </ b> D.

  The closing portion 1D can be retrofitted and fixed to the towing vehicle B by a mounting bracket or the like (not shown). The engaging portion 1E opens the connection pipe 72 when not connected, and the closing portion 1D when connected. Thus, the connection pipe 72 is closed.

  Even in the air brake system 1 ′ configured as described above, when the connected vehicle A is detached from the towing vehicle B, the entire connecting portion 10 ′ is not detached from the towing vehicle B, and the engaging portion 1 E is disengaged from the closing portion 1 D. Therefore, the emergency line 7 can be opened.

  Further, since the connecting pipe 72 is closed by the closing part 1D when the engaging part 1E is connected, the air pressure of the emergency line 7 can be maintained in the connected state, and the operation of the service brake by the brake operation on the towing vehicle B side is ensured. Can be done. Further, in the disconnected state, the emergency line 7 can be opened, and the emergency brake can be reliably operated regardless of the brake operation on the towing vehicle B side.

  In addition, since the emergency line 7 is connected to the connecting portion 10 ′ at one place, it is possible to speed up the operation of connecting the emergency line 7 when connecting the connected vehicle A and the towing vehicle B, and to connect the emergency line 7. Can be prevented from becoming complicated.

  FIG. 6 is a configuration diagram showing a third embodiment of the air brake system 1 ″ according to the present invention. Parts overlapping with the first embodiment and the second embodiment are described by attaching the same reference numerals. Is omitted.

  The air brake system 1 ″ is such that the emergency line 7 is piped over the connection portion 10 ′ and the relay emergency valve 4, and the air supply device 8 is connected only to the air tank 2.

  A three-way valve 73 is connected to the emergency line 7, and an air cylinder or the like (not shown) is connected to the three-way valve so that air pressure can be supplied to the emergency line 7.

  Even with such an air brake system 1 ″, the same effects as those of the first embodiment and the second embodiment can be obtained, and moreover, complication of piping of the emergency line 7 can be more effectively suppressed.

  The operation of the emergency brake is performed not only when the emergency line 7 is separated from the towing vehicle B but also when the air pressure is released from the emergency line 7 due to cutting or scratching.

A: articulated vehicle B: tow vehicle 1: air brake system 1 ': air brake system 1 ": air brake system 2: air tank 3: air brake device 4: relay emergency valve 5: service line 6: emergency air supply line 7 : Emergency line 8: Air supply device 9A: Check valve 9B: Check valve 10: Connection part 10 ': Connection part

Claims (4)

An air brake system provided in a connected vehicle towed by a towing vehicle;
An air tank for storing air used for braking the connected vehicle;
An air brake device that brakes the connected vehicle by the air pressure of the air tank;
A relay emergency valve for supplying air pressure of the air tank to the air brake device;
A service line and an emergency air supply line piped over the air tank and the relay emergency valve;
An emergency line piped across the towing vehicle and the relay emergency valve;
An air brake system for a connected vehicle comprising: a connection portion that connects the emergency line to the towing vehicle in an airtight and detachable manner and connects the emergency line so as to open when the emergency line is not connected.   The air brake system for a connected vehicle according to claim 1, further comprising an air supply device that supplies air to the air tank.   The air brake system for a coupled vehicle according to claim 2, wherein one end of the emergency line is connected to the air tank, and the air supply device is connected to the emergency line.   A check valve is provided in the emergency line on the air tank side and the relay emergency valve side with the air supply device as a boundary, and the check valve has the air supplied to the air tank and the emergency line as the air. 4. The air brake system for a connected vehicle according to claim 3, wherein the air brake system is arranged in a direction that does not flow backward toward the supply device.

Images