CN110843743A - Working method of trailer - Google Patents
Working method of trailer Download PDFInfo
- Publication number
- CN110843743A CN110843743A CN201911003867.1A CN201911003867A CN110843743A CN 110843743 A CN110843743 A CN 110843743A CN 201911003867 A CN201911003867 A CN 201911003867A CN 110843743 A CN110843743 A CN 110843743A
- Authority
- CN
- China
- Prior art keywords
- trailer
- brake
- communicated
- shell
- booster pump
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T7/00—Brake-action initiating means
- B60T7/12—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger
- B60T7/20—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger specially for trailers, e.g. in case of uncoupling of or overrunning by trailer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/12—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid
- B60T13/16—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid using pumps directly, i.e. without interposition of accumulators or reservoirs
- B60T13/168—Arrangements for pressure supply
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Braking Systems And Boosters (AREA)
Abstract
The invention relates to a working method of a trailer, wherein the trailer comprises an overspeed braking device, and the overspeed braking device comprises a trailer booster pump, a centrifugal control mechanism, a trailer air bag, a first one-way valve, a second one-way valve, a motorized reversing valve, a brake, a first air pipe and a second air pipe; the centrifugal control mechanism comprises a first half clamping ring, a second half clamping ring, a sealing ring, a spring, a centrifugal block and an annular sealing groove; the centrifugal block is connected with the centrifugal block in a sliding way, one end of the spring is fixedly connected with the first halving snap ring, and the other end of the spring is connected with the centrifugal block; the roller of the motor-driven reversing valve is contacted with or separated from the centrifugal block; the air outlet of the first one-way valve is communicated with the trailer air bag; the air outlet of the second one-way valve is communicated with the air inlet of the trailer booster pump; the air inlet port P of the motor-driven reversing valve is communicated with the air bag, the execution port A of the motor-driven reversing valve is communicated with the trailer booster pump, and the trailer booster pump is communicated with the inner cavity of the brake.
Description
Technical Field
The invention relates to a working method of a trailer.
Background
As shown in fig. 2, the axle of the trailer of the prior art comprises a hub 120 and an axle 121, the hub 120 is rotatably connected to the axle 121, and the wheels of the trailer are fixedly connected to the hub 120, i.e. the hub 120 can rotate with the wheels of the trailer, but the axle 121 cannot rotate with the wheels of the trailer. As shown in fig. 1, the prior art trailer brake device includes a trailer booster pump 100 and a trailer brake 101, and the brake device of the tractor includes an air compressor 110, a foot brake valve 111, a front axle booster pump 112, a rear axle booster pump 113, a front axle brake 114, a rear axle brake 115 and a tractor air bag 116. The air inlet of the trailer booster pump 100 is communicated with the second actuating port A2 of the foot brake valve 111 through an air pipe, and the liquid outlet of the trailer booster pump 100 is communicated with the trailer brake 101. An air outlet of an air compressor 110 of the tractor is respectively communicated with an air bag 116 of the tractor, a first air inlet port P1 of a foot brake valve 111 and a second air inlet port P2 of the foot brake valve 111, a first execution port A1 of the foot brake valve 111 is communicated with an air inlet of a front axle booster pump 112, and a liquid outlet of the front axle booster pump 112 is communicated with a front axle brake 114. The second execution port a2 of the foot brake valve 111 is respectively communicated with the air inlet of the rear axle booster pump 113 and the air inlet of the trailer booster pump 100, and the liquid outlet of the rear axle booster pump 113 is communicated with the rear axle brake 115. When the driver depresses the foot brake valve 111 of the tractor, the pressurized gas in the air bag 116 can pass through the foot brake valve 111 to the front axle brake 114, rear axle brake 115 and trailer brake 101, respectively, thereby providing both the tractor and the trailer with braking. The trailer braking device cannot automatically brake when the trailer runs on a downhill and at an overspeed, so that the safety is not high; and the trailer brake device cannot automatically brake when the trailer is accidentally unhooked from the tractor when the trailer runs on an uphill slope, so that the safety is not high.
Disclosure of Invention
The invention aims to provide a working method of a trailer, which has a simple structure and high safety.
In order to achieve the purpose, the technical scheme of the invention is as follows: a trailer comprises an overspeed braking device, wherein the overspeed braking device comprises a trailer booster pump, a centrifugal control mechanism, a trailer air bag, a first one-way valve, a second one-way valve, a motorized reversing valve, a brake, a first air pipe and a second air pipe; the centrifugal control mechanism comprises a first half clamping ring, a second half clamping ring, a sealing ring, a spring, a centrifugal block and an annular sealing groove; the centrifugal block is connected with the centrifugal block in a sliding mode, one end of the spring is fixedly connected to one end, close to the center of the circle of the first halving snap ring, of the radial sliding groove of the first halving snap ring, and the other end of the spring is connected to the centrifugal block radially outwards; the motor-driven reversing valve is fixedly connected to the brake, and a roller of the motor-driven reversing valve is in contact with or separated from the centrifugal block; the sealing ring is arranged in the annular sealing groove and forms end face sealing with the brake; the air inlet of the first one-way valve is communicated with the first air pipe, and the air outlet of the first one-way valve is communicated with the trailer air bag; the air inlet of the second one-way valve is communicated with a second air pipe, and the air outlet of the second one-way valve is communicated with the air inlet of the trailer booster pump; an air inlet P port of the motorized reversing valve is communicated with the air bag, an execution port A port of the motorized reversing valve is communicated with an air inlet of the trailer booster pump, and a liquid outlet of the trailer booster pump is communicated with an inner cavity of the brake.
The brake comprises a shell, an end cover, a static sheet, a dynamic sheet, a piston and a return spring; the end cover is fixedly connected to one end of the shell and provided with an oil inlet, and a liquid outlet of the trailer booster pump is communicated with an inner cavity of the shell of the brake through the oil inlet; the static sheets are fixedly connected to the shell and arranged alternately, and the static sheets and the moving sheets are both positioned in the inner cavity of the shell; the piston is connected in the inner cavity of the shell in a sliding mode; the reset spring is arranged in the inner cavity of the shell and sleeved on the piston, one end of the reset spring is abutted against the shell, and the other end of the reset spring is abutted against the piston.
The section of the piston is Z-shaped; the shell comprises a left shell and a right shell, and the section of the right shell is L-shaped.
The invention has the advantages that: (1) according to the centrifugal clamping device, the first half clamping ring and the second half clamping ring are in circumferential gapless fit to form a circular ring, the end part of the formed circular ring is provided with the annular sealing groove, the first half clamping ring is provided with the radial sliding groove, the centrifugal block is connected in the sliding groove of the first half clamping ring in a sliding mode, one end of the spring is fixedly connected to one end, close to the circle center of the first half clamping ring, of the radial sliding groove of the first half clamping ring, and the other end of the spring is connected to the centrifugal block in a radially outward mode; the motor-driven reversing valve is fixedly connected to the brake, and a roller of the motor-driven reversing valve is in contact with or separated from the centrifugal block; the air inlet of the first one-way valve is communicated with the first air pipe, and the air outlet of the first one-way valve is communicated with the trailer air bag; the air inlet of the second one-way valve is communicated with a second air pipe, and the air outlet of the second one-way valve is communicated with the air inlet of the trailer booster pump; an air inlet port P of the motorized reversing valve is communicated with the air bag, an execution port A of the motorized reversing valve is communicated with an air inlet of the trailer booster pump, and a liquid outlet of the trailer booster pump is communicated with an inner cavity of the brake; when the brake is used, the first air pipe 7 is communicated with the air outlet of the air compressor 110 on the tractor, the second air pipe 8 is communicated with the second execution port A2 of the foot brake valve 111 on the tractor, the first half clamping ring 11 and the second half clamping ring 12 are fixedly connected to the hub 120 of the trailer through bolts, the shell 61 of the brake 6 is fixedly connected to the axle 121 of the trailer, and the rotor 64 of the brake 6 is fixedly connected to the hub 120 of the trailer. Therefore, when the tractor drives the trailer to run at an overspeed on a downhill road, the rotating speed of the hub of the trailer is increased, and the rotating speed of the first half snap ring is also increased. The centrifugal block can overcome the spring force of the spring to move outwards in the radial direction under the action of centrifugal force, the centrifugal block is firstly contacted with a roller of the motorized reversing valve and then pushes the roller to move the valve core, the motorized reversing valve reverses, and at this time, an air inlet P port of the motorized reversing valve is communicated with an execution port A port. Therefore, pressure gas in the trailer gas bag enters the trailer booster pump, and pressure oil at a liquid outlet of the trailer booster pump enters the brake to brake the brake. When the trailer runs on an uphill and is accidentally unhooked with the tractor, the first air pipe and the second air pipe are broken by pulling, the trailer can slide downwards under the action of gravity, the sliding speed of the trailer can be faster and faster, namely, the rotating speed of the hub of the trailer can be faster and faster, the rotating speed of a first half clamping ring fixedly connected to the hub of the trailer can also be faster and faster, so that a centrifugal block in a radial sliding groove of the first half clamping ring can overcome the spring force of a spring to move outwards under the action of centrifugal force, the centrifugal block is firstly contacted with a roller of the motor-driven reversing valve and then pushes the roller to move a valve core, the motor-driven reversing valve reverses, and at the moment, an air inlet P port of the motor-driven reversing valve is communicated with an. Therefore, pressure gas in the trailer gas bag enters the trailer booster pump, and pressure oil at the liquid outlet of the trailer booster pump enters the brake to brake the brake, namely the invention can automatically brake when the trailer is accidentally unhooked during uphill driving, and has high safety. (2) According to the invention, the first half clamping ring and the second half clamping ring are in circumferential gapless fit to form a circular ring, the end part of the formed circular ring is provided with the annular sealing groove, the first half clamping ring is provided with the radial sliding groove, the centrifugal block is connected in the sliding groove of the first half clamping ring in a sliding manner, the sealing ring is arranged in the annular sealing groove, and the sealing ring and the brake form end face sealing, so that the first half clamping ring can be used for placing the centrifugal block and can also be used for placing the sealing ring for sealing, and the structure is very simple.
The invention is further described below with reference to the accompanying drawings and the examples given.
Drawings
FIG. 1 is a schematic diagram of a prior art coupling of a trailer brake to a tractor brake;
FIG. 2 is a schematic view of the axle to hub connection of a trailer of the prior art;
FIG. 3 is a control schematic of the present invention;
FIG. 4 is a schematic view of the centrifugal control mechanism of the present invention;
FIG. 5 is a schematic sectional view A-A of FIG. 4;
FIG. 6 is a schematic illustration of the centrifugal control mechanism, motorized reversing valve 5, and brake 6 of the present invention attached to the axle and hub of a trailer;
FIG. 7 is a control schematic of the present invention in connection with the brake of the tractor;
FIG. 8 is a schematic illustration of the connection of the first split snap ring, spring, centrifugal mass and motorized reversing valve of the centrifugal control mechanism;
FIG. 9 is an enlarged schematic view of a section B-B of the centrifugal mass of FIG. 8 shown separated from the roller of the motorized reversing valve;
FIG. 10 is an enlarged schematic view of a section B-B of the FIG. 8 centrifugal block in contact with a roller of a motorized reversing valve.
The reference numbers in the above figures are as follows: the trailer comprises a centrifugal control mechanism 1, a trailer air bag 2, a first check valve 3, a second check valve 4, a motor-driven reversing valve 5, a brake 6, a first air pipe 7, a second air pipe 8, a first half clamping ring 11, a sliding groove 11-1, a second half clamping ring 12, a sealing ring 13, a spring 14, a centrifugal block 15, an annular sealing groove 16, a shell 61, a left shell 61-1, a right shell 61-2, an end cover 62, an oil inlet 62-1, a static sheet 63, a dynamic sheet 64, a piston 65, a return spring 66, a trailer booster pump 100, a trailer brake 101, an air compressor 110, a foot brake valve 111, a front axle booster pump 112, a rear axle booster pump 113, a front axle brake 114, a rear axle brake 115, a tractor air bag 116, a hub 120 and an axle 121.
Detailed Description
As shown in fig. 3 to 6, an overspeed brake apparatus of a trailer includes a trailer booster pump 100, and the trailer booster pump 100 is a type XM60 booster pump manufactured by the turnip lake force brake limited liability company. The trailer air bag type air-conditioning system further comprises a centrifugal control mechanism 1, a trailer air bag 2, a first one-way valve 3, a second one-way valve 4, a motorized reversing valve 5, a brake 6, a first air pipe 7 and a second air pipe 8; the motor-driven reversing valve 5 presses the roller 5-1 at the end part of the valve core to move the valve core by means of external force, so that the motor-driven reversing valve 5 is reversed without manual operation, and the type of the motor-driven reversing valve 5 can be 23C-25B or 23C-25 BH. The centrifugal control mechanism 1 comprises a first half clamping ring 11, a second half clamping ring 12, a sealing ring 13, a spring 14, a centrifugal block 15 and an annular sealing groove 16; the first halved snap ring 11 and the second halved snap ring 12 are both semicircular, the first halved snap ring 11 and the second halved snap ring 12 are in circumferential gapless fit to form a circular ring, an annular sealing groove 16 is arranged at the end part of the formed circular ring, a radial sliding groove 11-1 is arranged on the first halved snap ring 11, the centrifugal block 15 is connected in the sliding groove 11-1 of the first halved snap ring 11 in a sliding manner, one end of the spring 14 is fixedly connected to one end, close to the circle center of the first halved snap ring 11, of the radial sliding groove 11-1 of the first halved snap ring 11, and the other end of the spring 14 is connected to the centrifugal block 15 radially outwards; as shown in fig. 6, the motor-driven reversing valve 5 is fixedly connected to the brake 6, and the roller 5-1 of the motor-driven reversing valve 5 is in contact with or separated from the centrifugal block 15; as shown in fig. 8 to 10, when the centrifugal force of the centrifugal block 15 can overcome the acting force of the spring 14, the centrifugal block 15 can slide outwards along the radial direction of the first half snap ring 11 and then contact with the roller 5-1 of the motor-driven reversing valve 5 and push the roller 5-1 to move the valve core, so that the motor-driven reversing valve 5 is reversed, and the air inlet port P of the motor-driven reversing valve 5 is communicated with the execution port a. When the centrifugal force of the centrifugal block 15 cannot overcome the acting force of the spring 14, the centrifugal block 15 is connected and separated with the roller 5-1 of the motor-driven reversing valve 5 under the action of the spring 14, and at this time, the air inlet port P of the motor-driven reversing valve 5 is not communicated with the execution port A. As shown in fig. 6, the sealing ring 13 is disposed in the annular sealing groove 16, and the sealing ring 13 forms an end face seal with the brake 6; as shown in fig. 3 and 7, the air inlet of the first check valve 3 is communicated with the first air pipe 7, when the trailer air bag; when the trailer is unhooked from the tractor on a downhill road, an air pipe connected with the tractor, namely the first air pipe 7, of the trailer can be pulled off, and after the first air pipe 7 connected with the tractor of the trailer is pulled off after the first check valve 3 is arranged, pressure air in the air bag 2 of the trailer cannot flow into the atmosphere from the first air pipe 7 which is pulled off. The air inlet of the second one-way valve 4 is communicated with the second air pipe 8, when the brake system is used, the second air pipe 8 is communicated with a second execution port A2 of a foot brake valve 111 on a tractor, and the air outlet of the second one-way valve 4 is communicated with the air inlet of a trailer booster pump 100; an air inlet port P of the motorized reversing valve 5 is communicated with the air bag 2, an execution port A of the motorized reversing valve 5 is communicated with an air inlet of the trailer booster pump 100, and a liquid outlet of the trailer booster pump 100 is communicated with an inner cavity of the brake 6. After the second one-way valve 4 is arranged, when the second air pipe 8 connected with the trailer and the tractor is pulled off, the pressure air in the trailer air bag 2 can not flow into the atmosphere from the second air pipe 8 after being pulled off after passing through the motor-driven reversing valve 5.
As shown in fig. 6, the brake 6 includes a housing 61, an end cover 62, a stationary plate 63, a movable plate 64, a piston 65, and a return spring 66; the end cover 62 is fixedly connected to one end of the shell 61, an oil inlet 62-1 is formed in the end cover 62, and a liquid outlet of the trailer booster pump 100 is communicated with an inner cavity of the shell 61 of the brake 6 through the oil inlet 62-1; the static plates 63 are fixedly connected to the shell 61, the static plates 63 and the moving plates 64 are arranged at intervals, and the static plates 63 and the moving plates 64 are both positioned in the inner cavity of the shell 61; the piston 65 is slidably connected in the inner cavity of the housing 61; the return spring 66 is arranged in the inner cavity of the shell 61, the return spring 66 is sleeved on the piston 65, one end of the return spring 66 abuts against the shell 61, and the other end of the return spring 66 abuts against the piston 65. When pressure oil at a liquid outlet of the trailer booster pump 100 enters an inner cavity of a shell 61 of the brake 6 through an oil inlet 62-1, the pressure oil pushes a piston 65 to move leftwards, the piston 65 presses a movable plate 64 tightly, a movable plate 63 and the fixed plate 64 are combined, and the trailer brakes; when no pressure oil enters the inner cavity of the shell 61 of the brake 6 through the oil inlet 62-1 at the liquid outlet of the trailer booster pump 100, the piston 65 moves rightwards under the pushing of the return spring 66, the movable and static plates 63 and the movable plate 64 are separated, and the trailer releases the brake.
The cross section of the piston 65 is Z-shaped; the shell 61 comprises a left shell 61-1 and a right shell 61-2, and the cross section of the right shell 61-2 is L-shaped. This arrangement makes it possible to increase the contact area between the piston 65 and the rotor 64, to increase the braking force when the pressure of the pressurized oil is the same, and to design the brake smaller when the braking force is the same; but also allows the return spring 66 to be arranged more compactly and the brake to be designed smaller.
As shown in fig. 6 and 7, in use, the first air pipe 7 is communicated with the air outlet of the air compressor 110 on the tractor, the second air pipe 8 is communicated with the second execution port a2 of the foot brake valve 111 on the tractor, and the first half-clamping ring 11 and the second half-clamping ring 12 are fixedly connected to the hub 120 of the trailer through bolts, so that the first half-clamping ring 11 and the second half-clamping ring 12 can rotate together with the hub 120 of the trailer. The housing 61 of the brake 6 is fixedly connected to the axle 121 of the trailer, and since the axle 121 of the trailer does not rotate when the trailer is running, the housing 61 of the brake 6 fixedly connected to the axle 121 does not rotate either; the rotor 64 of the brake 6 is fixedly connected to the hub 120 of the trailer so that the rotor 64 rotates with the hub 120 of the trailer when the trailer is in operation.
The working principle of the invention is as follows: when the tractor drives the trailer to run on a downhill road without overspeed, the air inlet port P of the motor-driven reversing valve 5 is not communicated with the execution port A, and pressure gas in the trailer air bag 2 cannot enter the trailer booster pump 100. When braking is needed, a driver steps on a foot brake valve 111 on the tractor, so that pressure gas in a tractor gas bag 116 enters the trailer booster pump 100 through the foot brake valve 111 and then through the second one-way valve 4), and pressure oil at a liquid outlet of the trailer booster pump 100 enters the brake 6, so that the brake 6 brakes. When the tractor drives the trailer to run at an overspeed on a downhill road, the rotation speed of the hub 120 of the trailer is increased, and the rotation speed of the first half snap ring 11 is also increased because the first half snap ring 11 is fixedly connected to the hub 120 of the trailer through bolts. Therefore, the centrifugal block 15 which is slidably connected in the radial sliding groove 11-1 of the first half snap ring 11 can overcome the spring force of the spring 14 to move outwards in the radial direction under the action of centrifugal force, after moving outwards in the radial direction of the first half snap ring 11 under the action of centrifugal force, the centrifugal block 15 is firstly contacted with the roller 5-1 of the motor-driven reversing valve 5 and then pushes the roller 5-1 to move the valve core, the motor-driven reversing valve 5 reverses, and at this time, the air inlet P port of the motor-driven reversing valve 5 is communicated with the execution port A. Therefore, pressure gas in the trailer gas bag 2 enters the trailer booster pump 100, pressure oil at a liquid outlet of the trailer booster pump 100 enters the brake 6, and the brake 6 is braked, namely the trailer can be automatically braked when running at an overspeed on a downhill, so that the safety is high.
When the trailer is accidentally unhooked from the tractor when running on an uphill slope, the first air pipe 7 and the second air pipe 8 are pulled off, meanwhile, as the trailer runs on the slope of the uphill, the trailer can slide down under the action of gravity and the sliding-down speed of the trailer can be faster and faster, i.e. the hub 120 of the trailer will rotate faster and faster, the first split snap ring 11 fixedly connected to the hub 120 of the trailer will rotate faster and faster, therefore, the centrifugal block 15 which is slidably connected in the radial sliding groove 11-1 of the first half snap ring 11 can overcome the spring force of the spring 14 to move outwards in the radial direction under the action of centrifugal force, after moving outwards in the radial direction of the first half snap ring 11 under the action of centrifugal force, the centrifugal block 15 is firstly contacted with the roller 5-1 of the motor-driven reversing valve 5 and then pushes the roller 5-1 to move the valve core, the motor-driven reversing valve 5 reverses, and at this time, the air inlet P port of the motor-driven reversing valve 5 is communicated with the execution port A. Therefore, pressure gas in the trailer gas bag 2 enters the trailer booster pump 100, pressure oil at a liquid outlet of the trailer booster pump 100 enters the brake 6, and the brake 6 is braked, namely the trailer booster pump can automatically brake when the trailer is accidentally unhooked from the tractor during uphill driving, so that the safety is high.
As shown in fig. 6, the braking principle of the brake 6 of the present invention is as follows: when pressure oil at a liquid outlet of the trailer booster pump 100 enters an inner cavity of a shell 61 of the brake 6 through an oil inlet 62-1, the pressure oil pushes a piston 65 to move leftwards, the piston 65 presses a movable plate 64 to enable a fixed plate 63 to be combined with the movable plate 64, as an axle 121 of the trailer does not rotate when the trailer operates, the shell 61 of the brake 6 fixedly connected to the axle 121 does not rotate, the fixed plate 63 fixedly connected to the shell 61 does not rotate, after the fixed plate 63 is combined with the movable plate 64, the rotating speed of the movable plate 64 starts to decrease until the movable plate does not rotate, the rotating speed of a hub 120 of the trailer fixedly connected with the movable plate 64 also starts to decrease until the trailer does not rotate, and the trailer brakes. When no pressure oil enters the inner cavity of the shell 61 of the brake 6 through the oil inlet 62-1 at the liquid outlet of the trailer booster pump 100, the piston 65 moves rightwards under the pushing of the return spring 66, the movable and static plates 63 and the movable plate 64 are separated, and the trailer releases the brake.
Claims (2)
1. A brake for a trailer over-speed brake device, comprising: the device comprises a shell (61), an end cover (62), a static sheet (63), a dynamic sheet (64), a piston (65) and a return spring (66); the end cover (62) is fixedly connected to one end of the shell (61), an oil inlet (62-1) is formed in the end cover (62), and a liquid outlet of the trailer booster pump (100) is communicated with an inner cavity of the shell (61) of the brake (6) through the oil inlet (62-1); the static sheets (63) are fixedly connected to the shell (61), the static sheets (63) and the moving sheets (64) are arranged alternately, and the static sheets (63) and the moving sheets (64) are both positioned in an inner cavity of the shell (61); the piston (65) is connected in the inner cavity of the shell (61) in a sliding way; the return spring (66) is arranged in the inner cavity of the shell (61), the return spring (66) is sleeved on the piston (65), one end of the return spring (66) abuts against the shell (61), and the other end of the return spring (66) abuts against the piston (65).
2. A method of operating a trailer comprising an over-speed brake device comprising a trailer booster pump (100), characterized in that: the trailer air bag; the centrifugal control mechanism (1) comprises a first half clamping ring (11), a second half clamping ring (12), a sealing ring (13), a spring (14), a centrifugal block (15) and an annular sealing groove (16); the first halving snap ring (11) and the second halving snap ring (12) are both semicircular, the first halving snap ring (11) and the second halving snap ring (12) are circumferentially matched in a gapless manner to form a circular ring, an annular sealing groove (16) is formed in the end part of the formed circular ring, a radial sliding groove (11-1) is formed in the first halving snap ring (11), the centrifugal block (15) is connected in the sliding groove (11-1) of the first halving snap ring (11) in a sliding manner, one end of the spring (14) is fixedly connected to one end, close to the circle center of the first halving snap ring (11), of the radial sliding groove (11-1) of the first halving snap ring (11), and the other end of the spring (14) is connected to the centrifugal block (15) outwards in the radial direction; the motor-driven reversing valve (5) is fixedly connected to the brake (6), and a roller (5-1) of the motor-driven reversing valve (5) is in contact with or separated from the centrifugal block (15); the sealing ring (13) is arranged in the annular sealing groove (16), and the sealing ring (13) and the brake (6) form end face sealing; an air inlet of the first one-way valve (3) is communicated with a first air pipe (7), and an air outlet of the first one-way valve (3) is communicated with the trailer air bag (2); the air inlet of the second one-way valve (4) is communicated with a second air pipe (8), and the air outlet of the second one-way valve (4) is communicated with the air inlet of a trailer booster pump (100); an air inlet P port of the motor-driven reversing valve (5) is communicated with the air bag (2), an execution port A port of the motor-driven reversing valve (5) is communicated with an air inlet of the trailer booster pump (100), and a liquid outlet of the trailer booster pump (100) is communicated with an inner cavity of the brake (6);
the brake (6) comprises a shell (61), an end cover (62), a static sheet (63), a dynamic sheet (64), a piston (65) and a return spring (66); the end cover (62) is fixedly connected to one end of the shell (61), an oil inlet (62-1) is formed in the end cover (62), and a liquid outlet of the trailer booster pump (100) is communicated with an inner cavity of the shell (61) of the brake (6) through the oil inlet (62-1); the static sheets (63) are fixedly connected to the shell (61), the static sheets (63) and the moving sheets (64) are arranged alternately, and the static sheets (63) and the moving sheets (64) are both positioned in an inner cavity of the shell (61); the piston (65) is connected in the inner cavity of the shell (61) in a sliding way; the reset spring (66) is arranged in the inner cavity of the shell (61), the reset spring (66) is sleeved on the piston (65), one end of the reset spring (66) abuts against the shell (61), and the other end of the reset spring (66) abuts against the piston (65);
the working method comprises the following steps: when the brake is used, the first air pipe 7 is communicated with an air outlet of an air compressor (110) on a tractor, the second air pipe 8 is communicated with a second execution port A2 of a foot brake valve (111) on the tractor, the first halving snap ring (11) and the second halving snap ring (12) are fixedly connected to a hub (120) of a trailer through bolts, a shell (61) of the brake (6) is fixedly connected to a wheel shaft (121) of the trailer, and a moving plate (64) of the brake (6) is fixedly connected to the hub (120) of the trailer;
when the tractor drives the trailer to run at an overspeed on a downhill road, the rotating speed of the hub of the trailer is accelerated, and the rotating speed of the first halving snap ring is also accelerated; the centrifugal block overcomes the spring force of the spring to move outwards in the radial direction under the action of centrifugal force, the centrifugal block is firstly contacted with a roller of the motorized reversing valve and then pushes the roller to move the valve core, the motorized reversing valve reverses, and at this time, an air inlet P port of the motorized reversing valve is communicated with an execution port A port; therefore, pressure gas in the trailer gas bag enters the trailer booster pump, and pressure oil at a liquid outlet of the trailer booster pump enters the brake to brake the brake.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911003867.1A CN110843743A (en) | 2017-11-07 | 2017-11-07 | Working method of trailer |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911003867.1A CN110843743A (en) | 2017-11-07 | 2017-11-07 | Working method of trailer |
| CN201711086650.2A CN107867270B (en) | 2017-11-07 | 2017-11-07 | The overspeed braking device of trailer |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711086650.2A Division CN107867270B (en) | 2017-11-07 | 2017-11-07 | The overspeed braking device of trailer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110843743A true CN110843743A (en) | 2020-02-28 |
Family
ID=61753752
Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911003867.1A Withdrawn CN110843743A (en) | 2017-11-07 | 2017-11-07 | Working method of trailer |
| CN201911003978.2A Withdrawn CN110723125A (en) | 2017-11-07 | 2017-11-07 | Trailer |
| CN201711086650.2A Active CN107867270B (en) | 2017-11-07 | 2017-11-07 | The overspeed braking device of trailer |
Family Applications After (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911003978.2A Withdrawn CN110723125A (en) | 2017-11-07 | 2017-11-07 | Trailer |
| CN201711086650.2A Active CN107867270B (en) | 2017-11-07 | 2017-11-07 | The overspeed braking device of trailer |
Country Status (1)
| Country | Link |
|---|---|
| CN (3) | CN110843743A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101666362A (en) * | 2008-09-03 | 2010-03-10 | 陈伯恒 | Centrifugal mechanically controlled clutch |
| JP2010120444A (en) * | 2008-11-18 | 2010-06-03 | Showa Aircraft Ind Co Ltd | Warning device for vehicle rollover suppression |
| CN103192812A (en) * | 2013-03-29 | 2013-07-10 | 常州科研试制中心有限公司 | Control device of braking system of trackless rubber-tyre trailer |
| CN104358804A (en) * | 2014-10-29 | 2015-02-18 | 李开卫 | Multi-wet disc type brake and running method thereof |
| CN205730004U (en) * | 2016-04-14 | 2016-11-30 | 贵州大学 | A kind of high-rise circulation escape device |
| CN205730001U (en) * | 2016-04-14 | 2016-11-30 | 贵州大学 | A kind of speed control of high-rise circulation escape device |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2952093A1 (en) * | 1979-12-22 | 1981-07-02 | Sachs Systemtechnik Gmbh, 8720 Schweinfurt | Braking system for trailer of vehicle - has sensor in form of moving coil detecting centrifugal force and initiating braking |
| CN102358281B (en) * | 2011-08-03 | 2013-08-21 | 石家庄中煤装备制造股份有限公司 | Parking braking protection system |
| CN203819219U (en) * | 2014-03-28 | 2014-09-10 | 常州科研试制中心有限公司 | Cage car for underground coal mine |
| US9908377B2 (en) * | 2015-12-01 | 2018-03-06 | Hayes Towing Electronics LLC | Apparatus and method for sway control |
| CN106562612B (en) * | 2016-11-14 | 2019-09-13 | 永康市普方铝业有限公司 | A kind of baby walker with high security |
-
2017
- 2017-11-07 CN CN201911003867.1A patent/CN110843743A/en not_active Withdrawn
- 2017-11-07 CN CN201911003978.2A patent/CN110723125A/en not_active Withdrawn
- 2017-11-07 CN CN201711086650.2A patent/CN107867270B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101666362A (en) * | 2008-09-03 | 2010-03-10 | 陈伯恒 | Centrifugal mechanically controlled clutch |
| JP2010120444A (en) * | 2008-11-18 | 2010-06-03 | Showa Aircraft Ind Co Ltd | Warning device for vehicle rollover suppression |
| CN103192812A (en) * | 2013-03-29 | 2013-07-10 | 常州科研试制中心有限公司 | Control device of braking system of trackless rubber-tyre trailer |
| CN104358804A (en) * | 2014-10-29 | 2015-02-18 | 李开卫 | Multi-wet disc type brake and running method thereof |
| CN205730004U (en) * | 2016-04-14 | 2016-11-30 | 贵州大学 | A kind of high-rise circulation escape device |
| CN205730001U (en) * | 2016-04-14 | 2016-11-30 | 贵州大学 | A kind of speed control of high-rise circulation escape device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107867270B (en) | 2019-11-19 |
| CN110723125A (en) | 2020-01-24 |
| CN107867270A (en) | 2018-04-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6159971B2 (en) | Pressure control device for tire filling device having rotation relay device, rotation relay device, tire filling device, automobile having tire filling device, and operation method of tire filling device | |
| CN110312623B (en) | Wheel, in particular bicycle wheel, hub for such a wheel and vehicle equipped with such a wheel | |
| KR20150038041A (en) | Combined motor and brake with rotating brake-release piston | |
| JP2014520029A5 (en) | ||
| US3334711A (en) | Hydrodynamic brake and speed controlled friction brakes | |
| US2681713A (en) | Rotary fluid brake | |
| US20050037885A1 (en) | Limited slip differential with integrated solenoid valve and plenum | |
| AU2013246762A1 (en) | Pump or rotary compressor | |
| CN110843743A (en) | Working method of trailer | |
| US3302741A (en) | Fluid drive system for vehicles | |
| US3182759A (en) | Combined turbo- and friction-brake with adjustable shrouding means and control meanstherefor | |
| CN109340320A (en) | A kind of wheel side speed reducer | |
| JP5735469B2 (en) | Hydraulic brake device for work vehicle | |
| EP0287099A2 (en) | A hydraulic retarder attached with parking brake | |
| CN201427572Y (en) | Parking system | |
| WO2017010900A1 (en) | Brake kinetic energy recovery system | |
| US3142360A (en) | Turbo-brake | |
| CN108248384B (en) | Throttle control device for vehicle | |
| US2938611A (en) | Anticreep and hill holder brake system | |
| CN208074055U (en) | Fork truck spring hydraulic dead-man's device | |
| CN201002591Y (en) | Wet type brake device for tractor front drive axle | |
| CN205220363U (en) | Bridge inspect vehicle's travel driving unit | |
| CN205479049U (en) | Dry -type of radially admitting air disc brake | |
| US20040251091A1 (en) | Dual function brake system | |
| JP2546672B2 (en) | Fluid type retarder with parking brake |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20200228 |
|
| WW01 | Invention patent application withdrawn after publication |