KR19990028008U - Automatic brake system of tractor trailer - Google Patents

Abstract

The present invention realizes a simplification of the structure to reduce the production cost, and at the same time to facilitate the maintenance and repair, the structure is installed on the center frame (6) of the trailer (2) so that the tractor It is coupled to the pressing member 8 which acts before and after the stop, the first rotating member 14 which is installed to be rotated at the distal end of the pressing member 8 and transmits the acting force, and the first rotating member 14. A shock absorbing member 28 which prevents the pressing member 8 from operating suddenly and provides an acting force for returning to its original position, and a connecting member connected to the first rotating member 14 to transmit the acting force. (32), the second rotating member 60 is installed to be rotated at the distal end of the connecting member 32 to transmit an action force, and the brake unit is provided on one side of the second rotating member 60 to exert a braking function ( Tractor trailer consisting of 74) It relates to the automatic braking device.

Description

Automatic brake system of tractor trailer

The present invention relates to an automatic brake device for a trailer for a tractor. In particular, a tractor that focuses on simplifying the structure of a power transmission means for stopping a trailer, making it easier to maintain and repair, while reducing manufacturing costs. It relates to the automatic brake device of a trailer.

In general, an automatic brake device used in a trailer enables the brake system of the trailer to be automatically operated and stopped separately from the tractor when the tractor drives the brake system while driving on a sloped road.

In the prior art, a main frame 102 is constructed in a trailer as shown in FIGS. 7 and 8, wherein the wire 104 is configured to transmit an action force provided from an unshown main rod on the main frame 102. The upper end of the first lever 106 is coupled to the distal end of the wire 104, and the first lever 106 is rotatably installed on the support frame 114 installed below the main frame 102. A second lever 110 coupled to one side of the shaft 108 and rotating together with the other side of the first shaft 108 is coupled.

In addition, one end of the first rod 112 that transmits an action force is installed at upper ends of the first and second levers 106 and 110, and a third lever 116 is coupled to the other end of the first rod 112. The third lever 116 is installed on the second shaft 118 rotatably coupled to the support frame 114.

Both ends of the second shaft 118 are coupled to the brake unit 120 that exhibits a braking function, and a spring 122 that provides an action force to release the braking function of the brake unit 120 may include the third shaft. Both ends of the lever 116 and the main frame 102 are fixed.

In addition, one end of the second rod 124 for transmitting an action force is installed at the lower ends of the first and second levers 106 and 110, and the fourth lever 126 is coupled to the other end of the second rod 124. The fourth lever 126 is installed on the third shaft 128 rotatably installed on the support frame 114.

And both ends of the third shaft 128 is coupled to the brake unit 120 that exhibits a braking function.

In this case, the brake unit 120 is installed at both ends of the first and second axles 130 and 132 coupled to the support frame 114, respectively.

Referring to the operation of the conventional embodiment configured as described above are as follows.

When the tractor first stops while driving on an inclined road, the trailer driving with the tractor tries to continue by inertial force. At this time, the main rod coupled to the rear of the tractor is pushed to apply a force to the wire 104. Will be delivered.

When the action force is transmitted to the wire 104 as described above, the first lever 106 is rotated together with the first shaft 108 and the second lever 110, and at the same time the action force is the first, second rod ( 112, 124 and the third and fourth levers 116, 126 in this order.

Accordingly, the brake unit 120 is operated by the third and fourth levers 116 and 126 to exert a braking function.

As described above, in the state in which the brake unit 120 exhibits a braking function, the third lever 116 rotates while resisting the repulsive force of the spring 122.

At this time, if the tractor continues to park on the inclined road, the main rod continues to push the wire 104 because the trailer is in close contact with the tractor.

On the other hand, when the trailer runs on a flat road away from the inclined road, the spring 122 rebounds and returns the third lever 116 to its original position, which causes the third lever 116 to return to its original position. As a result, the second shaft 118 rotates to cancel the braking function of the brake unit 120.

The conventional technology described above has a problem that the manufacturing cost increases due to the complicated structure of the means for transmitting the acting force so that the brake part can exert the braking function, and also has a problem that is difficult to repair and repair.

The object of the present invention is to reduce the manufacturing cost by realizing the simplification of the structure, and to make the maintenance and repair easier.

The present invention for realizing this, the pressing member is installed on the frame of the trailer and acts before and after the tractor is stopped, the first rotating member is installed to be rotated to the pressing member tip portion to transmit the action force, and the first A shock absorbing member coupled to the rotating member to prevent the pressing member from operating suddenly and providing an acting force to return to the original position, and a connecting member connected to the first rotating member to simultaneously transmit the acting force to both sides of the axle. And a second rotating member pivotally installed at the distal end of the connecting member to transmit an action force, and a brake unit disposed at one side of the second rotating member to exert a braking function on the wheel.

1 is a plan view showing an embodiment of the present invention.

2 is a partial perspective view showing an embodiment of the present invention.

Figure 3 is a partial detailed view showing an embodiment of the present invention.

Figure 4 is a partially separated perspective view showing an embodiment of the present invention.

5 is a brake device operating by an embodiment of the present invention.

Figure 6 (a) (b) (c) is an operating state diagram in this notice.

7 is a perspective view showing a conventional embodiment.

Figure 8 is a side cross-sectional view showing a conventional embodiment.

* Explanation of symbols for main parts of the drawings

2: trailer 4: main frame

6 center frame 8 pressure member

10 main rod 12 hook

14 first rotating member 16 first lever

18: damper 20: shaft

22,72: supporter 24: second lever

26,66; Pin 28: cushioning member

30: shock absorber 32: connecting member

34: First Road 36: Bar

38: first guide tube 40: second guide tube

42: second rod 44: nut

46: pulling member 48: handle

50: balance weight 52: guide rod

54 Bracket 56 Cable

58 tube 60 second rotating member

62: mass 64: rug

68 shaft 70 axle

74: brake part 76: brake backing plate

78: cam

1 to 5, the main frame 4 is configured in the trailer 2, and the center frame 6 is installed in the center of the main frame 4.

The center frame 6 is provided with a pressing member 8 for forwarding and reversing and providing a force when the trailer 2 is stopped on an inclined road. The pressing member 8 has a rod-shaped main. It is composed of a rod 10, the hook 12 is formed integrally to the front end of the main rod 10 to be coupled to the tractor tail not shown.

A first rotating member 14 is installed at the distal end of the main rod 10 to be pivotally mounted to the center frame 6 and transmits an action force. The first rotating member 14 is provided from the main rod 10. The first lever 16 is configured to rotate by receiving the action force.

A damper 18 is provided at the lower end of the first lever 16 to be in close contact with the tip of the main rod 10, and a shaft 20 constituting a rotation center is coupled to the center of the first lever 16. Both sides of the shaft 20 are rotatably installed in the supporter 22 provided in the center frame 6.

In addition, a second lever 24 serving as a ground region is disposed on the shaft 20 so as to be spaced apart from the first lever 16, and a pin 26 is provided on the first and second levers 16 and 24. The pin 26 is coupled to the pin 26 of the shock absorber 30, which is a shock absorbing member 28 that provides a force to allow the main rod 10 to move smoothly and to return to its original position. The tip is joined.

In addition, the pin 26 is provided with a connecting member 32 for transmitting an action force provided from the main rod 10, one end of the first rod 34 constituting the connecting member 32 is the pin ( 26, the other end of the first rod 34 is slidably coupled to the first guide pipe 38 provided on one side of the tip of the bar 36 constituting the connecting member 32.

At this time, the nut 37 which is to prevent the first rod 34 from being separated is fastened to the first rod 34 while being positioned at the rear end of the first guide tube 38.

In addition, a second guide tube 40 is installed at the other end of the bar 36, and a second rod 42 for transmitting an action force is slidably coupled to the inside of the second guide tube 40. One end of the second rod 42 is fastened with a nut 44 to prevent separation.

In addition, a pulling member 46 is provided at the distal end of the second rod 42 to provide an action force by an attractive force, and the pulling member 46 includes a handle 48 that is pivotally installed on the center frame 6. do.

On the other hand, the rear end of the bar 36, the balance weight 50 to adjust so that the force acting from the main rod 10 or the handle 48 can be transmitted while maintaining a balance is installed to rotate left, right do.

In the center of the balance weight 50, a guide rod 52 is provided to balance the bar 36 so that the bar 36 can move forward and backward, and the guide rod 52 has a bracket for guiding movement and supporting the movement. ) Is slidably coupled, and both ends of the bracket 54 are installed in the main frame 4.

And the rear end of the cable 56 for transmitting the action force to each side of the balance weight 50 is installed, respectively, the tube 58 is coupled to the outer periphery of the cable 56, the tube 58 of the One end is located in close contact with one surface of the bracket (54).

In addition, a second pivot member 60 is installed at the front end of the cable 56, and the second pivot member 60 includes a mass 62 that couples the cable 56. It is coupled to the pin (66) rotatably to the lug (64) for supporting.

At this time, the other end of the tube 58 is in close contact with the front surface of the mass (62).

Subsequently, the lower end of the lug 64 is provided with a shaft 68 that forms a pivot center, and one end of the shaft 68 is supported by a supporter 72 which is welded to the axle 70 installed on the main frame 4. It is coupled to rotate, and the other end of the shaft 68 is coupled to the brake portion 74 that exhibits a braking function.

The brake unit 74 has a brake backing plate 76 coupled to one end of the axle 70, and the brake backing plate 76 has a cam 78 coupled to one end of the shaft 68 and rotated. Is installed, the brake shoe 80 for generating a friction force is provided on the front outer side of the brake backing plate 76, the cam 78 is located at the upper end of the brake shoe 80.

Along with the cable 56, a bracket 82 installed perpendicular to the axle 70 is coupled to the front end of the cable 56, and a nut 84 fastened to the front end of the cable 56 is installed on the bracket 82.

Referring to the operation of the present invention configured as described above are as follows.

First, when the trailer 2 is located on a flat road, the state is as shown in FIG. 7 (a). However, when the tractor stops while driving on a sloped road, it operates as shown in (b). The order is as follows.

When the tractor stops, the trailer 2 moves forward by the inertial force to be in close contact with the tractor tail.

As a result, the main rod 10 installed in the center frame 6 is advanced backward. As a result, the front end of the main rod 10 presses the front surface of the damper 18 so that the first lever 16 It is rotated about the axis 20.

Accordingly, the first lever 16 pulls the first rod 34 coupled to the pin 26 and simultaneously presses the shock absorber 30, wherein the shock absorber 30 is applied to the first lever. This prevents the 16 from rotating rapidly, allowing the main rod 10 to move forward at a moderate speed.

When the first rod 34 is pulled as described above, the first guide tube 38 is slidably moved inside the first guide tube 38, and the first guide tube (not shown) is fastened by a nut 37 fastened to the distal end of the first rod 34. 38 is pulled together with bar 36.

As described above, when the bar 36 moves, the second guide tube 40 moves together. At this time, the second guide tube 40 moves along the outer circumference of the second rod 42 to slide. The rear end of the second guide tube 40 is spaced apart from the nut 44 fastened to the second rod 42.

Subsequently, when the bar 36 moves, the guide rod 52 is slidably moved in the bracket 54 to balance the bar 52, and at the same time, the balance weight 50 installed on the bar 52. ) Maintains balance by rotating left and right in the bar 36 so as to transmit the acting force transmitted to the second pivot member 60 in the same manner.

When the balance weight 50 moves together with the bar 36, the bent cable 56 is pulled out to be unfolded. At this time, the front end of the cable 56 is fixed to the bracket 54 and the tube 58. Unfolded together.

When the cable 56 and the tube 58 are unfolded as described above, the front end portion of the tube 58 presses the front surface of the mass 62 with the rear end portion as a supporting point so that the lug 64 presses the shaft 68. The shaft 68 rotates the cam 78 coupled to one end thereof so that the brake shoe 80 is brought into close contact with the inside of the brake drum.

Therefore, the trailer 2 is stopped due to the frictional force generated by the brake shoe 80 in close contact with the brake drum.

As described above, when the trailer 2 is stopped again, the main rod 10 is advanced backward. At this time, the first and second levers 16 and 24 are caused by the reaction force of the shock absorber 30. While rotating about the axis 20, the main rod 10 provides an acting force so that the main rod 10 can rewind.

When the first and second levers 16 and 24 are rotated as described above, the first rod 34 slides and moves inside the first guide tube 38 in a state in which it cannot provide an action force to the bar 36. Done.

At this time, the tube 58 unfolded by the external force is bent to the original position by the elastic force, thereby removing the external force applied to the mass 62 so that the shaft 68 of the second pivot member 60 is free to rotate. It becomes a state.

In the above state, the cam 78 installed at one end of the shaft 68 loses the action force and rotates in the reverse direction by the brake shoe 80 to return to its original position, but the cam 78 The shaft 68, the lug 64, and the like rotate simultaneously in the reverse direction.

Therefore, the trailer 2 in which the braking force is released is in a state capable of traveling together with the tractor.

On the other hand, when the handle 48 is pulled as shown in (c) to park the trailer 2 that has stopped moving, the handle 48 rotates and the second rod 42 moves the second guide pipe 40. In this case, the nut 44 coupled to the distal end of the second rod 42 is pushed while contacting one end of the second guide tube 40.

Accordingly, the bar 36 moves together with the second guide tube 40, and at the same time, the balance weight 50, the guide rod 52, the cable 56, and the like are pulled together with the bar 36.

At this time, as the first guide pipe 38 installed on the bar 36 slides and moves around the outer circumference of the first rod 34, the action force of the handle 48 influences the first pivot member 14. Will not reach.

Subsequently, when the cable 56 is pulled, the bent tube 58 is expanded as described above, and the front end portion rotates the shaft 68 by pressing the mass 62 with the rear end portion as a supporting point, and at the same time, the shaft The cam 78 rotates by 68, and the braking force is exerted by rotating the brake shoe 80. As shown in FIG.

On the contrary, when the handle 48 is returned to its original position, the braking force is released while the second rod 42 moves in the opposite direction as described above.

The present invention can reduce the production cost by realizing the simplification of the structure, and at the same time has the effect of easier maintenance and repair.

Claims (3)

A pressing member installed in the center frame of the trailer and acting before and after the tractor stops, A first rotating member installed to pivot on the pressing member and transmitting an action force; A shock absorbing member coupled to the first pivot member to prevent the pressing member from operating suddenly and to provide an action force to return to the original position; A connection member connected to the first pivot member to transmit an action force; A second rotating member installed to be rotated at the distal end of the connecting member and transmitting an action force; An automatic brake device for a trailer for a tractor, characterized in that the brake unit is installed on one side of the second pivot member to perform a braking function. The method of claim 1, The second rotating member has a shaft configured to operate the brake unit, a lug is installed on the shaft, the lug is installed so that the mass is rotated, and the tip of the cable is installed on the mass. Auto brake system. The method according to claim 1 or 2, Between the connecting member and the mass, the automatic brake device of the trailer for a tractor, characterized in that a tube for slidingly coupling the cable and providing an action force to the mass is installed.