Unhooking braking and parking braking system for trailer

Abstract

The utility model provides an unhooking braking and parking braking system for a trailer, which belongs to the technical field of trailer braking systems and comprises a front axle, a mop, an upper push rod, an upper connecting rod, a lower push rod, a lower connecting rod, a front pull rod, a chain body, a rear pull rod and a brake. The two ends of the upper connecting rod are hinged to the front pull rod and the upper push rod respectively, and the two ends of the lower connecting rod are hinged to the front pull rod and the lower push rod respectively. A rocker arm of the brake is hinged to the rear pull rod which is connected with the chain body. The mop rotates upwards to push the upper push rod, and the brake pull rod is pulled through the upper connecting rod to drive the brake to achieve parking braking. The mop rotates downwards to push the lower push rod, and the brake pull rod is pulled through the lower connecting rod to drive the brake to achieve unhooking braking. When parking braking and unhooking braking are carried out, the chain body can pull the rocker arm of the brake to carry out braking. When vibration occurs, the chain body reduces the influence of vibration through certain contraction and swing.

Description

Technical Field

[0001] The present application belongs to the technical field of trailer brake systems, and more specifically, to a trailer unhooking brake and parking brake system. Background Art

[0002] As a transport device, trailers are widely used in scenarios such as aviation ground cargo equipment. In order to prevent the trailer equipment from being unhooked or failing to achieve effective parking brakes while driving, causing safety accidents such as damage to the aircraft, personal injury to maintenance personnel and passengers, the trailer equipment must have reliable unhooking brakes and parking brakes.

[0003] In the prior art, the utility model patent with publication number CN218785986U discloses a braking system applied to airport cargo trailers, which can realize both the function of braking (parking brake) and the function of lowering brake (unhooking brake). Specifically, the system is provided with an upper brake push rod, an adjustment link and a brake rod that are hinged in sequence. When the mop rotates upward, the mop presses against the upper brake push rod and drives the brake rod to press against the tire to realize upper braking. At the same time, the system is provided with a lower brake push rod connected to the brake rod. When the mop rotates downward, the cam on the mop presses against the lower brake push rod and drives the brake rod to press against the tire to realize lower braking.

[0004] However, the solutions of the above-mentioned patent disclosures all have shortcomings. Specifically, for the upper brake, when the brake rod abuts against the tire, the vibration of the tire will be directly transmitted to the mop through the brake rod, the adjustment rod and the upper brake push rod. Similarly, for the lower brake, when the brake rod abuts against the tire, the vibration of the tire will be directly transmitted to the mop through the brake rod and the lower brake push rod. That is, whether it is the upper brake or the lower brake, there is no buffer structure between the tire and the mop to reduce the vibration, and the vibration will be completely transmitted along the entire brake system. If the distance between the tire and the mop is far, the length of the brake rod or the adjustment rod will also increase, and frequent vibrations will more easily cause damage to the rod body and reduce its life. Summary of the invention

[0005] The utility model provides a trailer unhooking brake and parking brake system, which can realize both parking brake and unhooking brake, and can reduce the vibration transmitted between the wheel and the mop, thereby ensuring the stability of the system.

[0006] To achieve the above-mentioned purpose, the technical solution adopted in the present application is: to provide a trailer unhooking brake and parking brake system, comprising a front axle, a mop and a brake mechanism, wheels are installed at both ends of the front axle, the bottom end of the mop is rotatably connected to the front end of the front axle, and the brake mechanism is installed with a reset component for disengaging from the braking state;

[0007] The braking mechanism includes a braking pull rod, an upper push rod, an upper connecting rod, a lower push rod, a lower connecting rod and a brake. The braking pull rod includes a front pull rod, a chain body and a rear pull rod which are fixedly connected in sequence at the ends. The middle part of the upper connecting rod is hinged to the front axle, the bottom end of the upper connecting rod is hinged to the front pull rod, and the top end of the upper connecting rod is hinged to the end of the upper push rod. The upper push rod is movably installed on the front axle, and the mop can rotate upward and abut against the end of the upper push rod away from the upper connecting rod. The middle part of the lower connecting rod is hinged to the front axle, the top end of the lower connecting rod is hinged to the front pull rod, and the bottom end of the lower connecting rod is hinged to the end of the lower push rod. The lower push rod is movably installed on the front axle, and the mop can rotate downward and abut against the end of the lower push rod away from the lower connecting rod. The brake is hinged to the front axle, the brake has a rocker arm, the rocker arm is hinged to the rear pull rod, and the side wall of the brake can rotatably abut against the wheel.

[0008] Optionally, the reset components include an upper reset spring and a lower reset spring. An upper step is provided on the outer side wall of the upper push rod, the upper reset spring is sleeved on the outer side of the upper push rod, and the two ends of the upper reset spring are respectively connected to the front axle and the upper step. A lower step is provided on the side wall of the lower push rod, the lower reset spring is sleeved on the outer side of the lower push rod, and the two ends of the lower reset spring are respectively connected to the front axle and the lower step.

[0009] Optionally, a transverse mounting cylinder is fixedly connected to the front axle, the front pull rod is covered inside the transverse mounting cylinder, and both the upper connecting rod and the lower connecting rod are hinged to the side wall of the transverse mounting cylinder.

[0010] An upper mounting edge is provided on the outer side wall of the top of the transverse mounting cylinder. The upper push rod is located outside the top of the transverse mounting cylinder, and the end of the upper reset spring away from the upper step is connected to the upper mounting edge. A lower mounting edge is provided on the outer side wall of the bottom of the transverse mounting cylinder. The lower push rod is located outside the bottom of the transverse mounting cylinder, and the end of the lower reset spring away from the lower step is connected to the lower mounting edge.

[0011] Optionally, the upper push rod includes a first upper rod body and a second upper rod body which are threadedly connected to each other at the ends. The end of the first upper rod body away from the second upper rod body is hinged to the upper connecting rod, and the mop can rotate upward and abut against the end of the second upper rod body away from the first upper rod body.

[0012] The lower push rod includes a first lower rod body and a second lower rod body which are threadedly connected to each other at the ends. The end of the first lower rod body away from the second lower rod body is hinged to the lower connecting rod, and the mop can rotate downward and abut against the end of the second lower rod body away from the first lower rod body.

[0013] Optionally, the brake adopts a drum brake.

[0014] Optionally, the rear pull rod includes an adjusting nut, a first rear rod body, and a second rear rod body; connection walls and external threaded columns are respectively provided at the ends of the first rear rod body and the second rear rod body, and connection holes are provided in the connection walls; the external threaded column passes through the connection hole and fixedly connects the first rear rod body and the second rear rod body by screwing the adjusting nut; the end of the first rear rod body away from the second rear rod body is hinged to the rocker arm, and the end of the second rear rod body away from the first rear rod body is fixedly connected to the chain body.

[0015] Optionally, the braking mechanism further includes an adjusting pin. The rocker arm is provided with a plurality of pin holes radially along its rotating shaft, and the adjusting pin is installed on the rear pull rod and passes through any of the pin holes.

[0016] Optionally, the chain body has a plurality of chain links that are linearly connected in sequence and are detachable from each other.

[0017] Optionally, it further includes a parking brake pedal, and the front axle is provided with a clamp; the middle of the parking brake pedal is hinged to the mop, one end of the parking brake pedal is provided with a foot pedal, and the other end of the parking brake pedal is provided with a hook that is rotatably hooked to the clamp; an electromagnet is installed on the front axle, and a tongue piece that is adsorbed to the electromagnet is provided on one side of the parking brake pedal close to the hook.

[0018] Optionally, an upper top block is fixedly connected to the side wall of the mop above its rotating shaft, and the upper top block rotatably abuts against the end of the upper push rod away from the upper connecting rod; a lower top block extending below the rotating shaft of the mop is fixedly connected to the mop, and the lower top block rotatably abuts against the end of the lower push rod away from the lower connecting rod.

[0019] The beneficial effects of the technical solution of the present application compared with the prior art are as follows:

[0020] When parking braking is required, the mop rotates upward and pushes the upper push rod to move. The upper push rod pulls the braking pull rod through the upper connecting rod and drives the brake to abut against the wheel to achieve parking braking. When the mop rotates downward due to unhooking, the mop pushes the lower push rod to move. The lower push rod pulls the braking pull rod through the lower connecting rod and drives the brake to abut against the wheel to achieve unhooking braking. Since a chain body is provided in the braking pull rod, the chain body can bear the tensile force and has a certain space for compression and swing. When parking braking and unhooking braking are performed, the chain body can pull the rocker arm of the brake to perform braking. When vibration occurs, the chain body reduces the influence when being vibrated through a certain amount of contraction and swing, ensures the stability of the parking system and reduces fatigue damage. At the same time, the braking mechanism adopts a pure mechanical structure and does not require external power supply. Description of the Drawings

[0021] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 It is a schematic diagram of the overall structure of the decoupling brake and parking brake system for trailers;

[0023] Figure 2 It is a side view of the overall structure of the decoupling brake and parking brake system for trailers;

[0024] Figure 3 It is Figure 2 The partial enlarged view at position A in

[0025] Figure 4 It is Figure 2 The partial enlarged view at position B in

[0026] Figure 5 It is a side view in the parking brake state;

[0027] Figure 6 It is Figure 5 The partial enlarged view at position C in

[0028] Icon: 1. Front axle; 101. Clamp; 102. Electromagnet; 2. Mop; 201. Upper top block; 202. Lower top block; 3. Wheel; 4. Braking mechanism; 401. Braking pull rod; 402. Upper push rod; 403. Upper connecting rod; 404. Lower push rod; 405. Lower connecting rod; 406. Brake; 407. Front pull rod; 408. Chain body; 409. Rear pull rod; 410. Rocker arm; 411. Upper return spring; 412. Lower return spring; 413. Upper step; 414. Lower step; 415. First upper rod body; 416. Second upper rod body; 417. First lower rod body; 418. Second lower rod body; 419. Adjusting nut; 420. First rear rod body; 421. Second rear rod body; 422. Connecting wall; 423. External threaded column; 424. Connecting hole; 425. Adjusting pin; 426. Pin hole; 5. Transverse mounting cylinder; 501. Upper mounting edge; 502. Lower mounting edge; 6. Parking brake pedal; 601. Foot pedal; 602. Hook; 603. Tongue; 7. Cross beam. Detailed implementation manners

[0029] In order to make the technical problems to be solved, technical solutions and beneficial effects of the present application more clearly understood, the following further details the present application in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0030] Embodiment:

[0031] This embodiment provides a decoupling brake and parking brake system for a trailer, based on Figures 1 to 4 As shown, it includes a front axle 1, a towing bar 2 and a braking mechanism 4. Wheels 3 are installed at both ends of the front axle 1. The bottom end of the towing bar 2 is rotatably connected to the front end of the front axle 1 for towing. The braking mechanism 4 is equipped with a reset component for disengaging the braking state.

[0032] On the basis of the above structure, the braking mechanism 4 includes a brake pull rod 401, an upper push rod 402, an upper connecting rod 403, a lower push rod 404, a lower connecting rod 405 and a brake 406. The brake pull rod 401 includes a front pull rod 407, a chain body 408 and a rear pull rod 409 which are fixedly connected in sequence at the end. The middle part of the upper connecting rod 403 is hinged to the front axle 1, the bottom end of the upper connecting rod 403 is hinged to the front pull rod 407, the top end of the upper connecting rod 403 is hinged to the end of the upper push rod 402, and the upper push rod 402 is movably installed on the front axle 1. The towing bar 2 can rotate upward and abut against the end of the upper push rod 402 away from the upper connecting rod 403. When parking braking is required, the towing bar 2 is rotated upward, and the towing bar 2 pushes the upper push rod 402 to move leftward ( Figure 2 and Figure 3 in the directions shown), the front pull rod rotates counterclockwise, and the upper push rod 402 pulls the brake pull rod 401 to move rightward through the upper connecting rod 403 and drives the rocker arm 410 of the brake 406 to swing. The side wall of the brake 406 abuts against the wheel 3 to achieve parking braking. At the same time, the middle part of the lower connecting rod 405 is hinged to the front axle 1, the top end of the lower connecting rod 405 is hinged to the front pull rod 407, the bottom end of the lower connecting rod 405 is hinged to the end of the lower push rod 404, and the lower push rod 404 is movably installed on the front axle 1. The towing bar 2 can rotate downward and abut against the end of the lower push rod 404 away from the lower connecting rod 405. When the towing bar 2 rotates downward after decoupling, the towing bar 2 pushes the lower push rod 404 to move leftward ( Figure 2 and Figure 3In the shown direction), the lower pull rod rotates clockwise, and the lower push rod 404 drives the brake pull rod 401 to move rightward through the lower connecting rod 405, driving the swing arm 410 of the brake 406 to swing. The side wall of the brake 406 abuts against the wheel 3 to achieve uncoupling braking. The brake 406 is hinged to the front axle 1. The brake 406 has a swing arm 410, and the swing arm 410 is hinged to the rear pull rod 409. Under the pulling action of the rear pull rod 409, the side wall of the brake 406 can rotate and abut against the wheel 3 to complete the braking process. Since a chain body 408 is provided in the brake pull rod 401, the chain body 408 can bear tension and has a certain space for compression and swing. When parking braking and uncoupling braking are performed, the chain body 408 can pull the swing arm 410 of the brake 406 to perform braking. When vibration occurs, the chain body 408 reduces the influence when being vibrated through a certain amount of contraction and swing, ensuring the stability of the parking system and reducing fatigue damage. It should be noted that since the brake 406 is located at two wheels 3, and the rear pull rod 409 is located in the middle of the front axle 1, the rear pull rod 409 can be indirectly connected to the swing arm 410 of the brake 406 through structures such as a cross beam 7.

[0033] Further, based on Figure 3As shown, the reset component includes an upper reset spring 411 and a lower reset spring 412. An upper step 413 is provided on the outer sidewall of the upper push rod 402. The upper reset spring 411 is sleeved on the outer side of the upper push rod 402, and both ends of the upper reset spring 411 are connected to the front axle 1 and the upper step 413 respectively. Similarly, a lower step 414 is provided on the sidewall of the lower push rod 404. The lower reset spring 412 is sleeved on the outer side of the lower push rod 404, and both ends of the lower reset spring 412 are connected to the front axle 1 and the lower step 414 respectively. Specifically, in this embodiment, the upper reset spring 411 is located on the left side of the upper step 413, and the upper push rod 402 is indirectly connected to the front axle 1 only through the upper reset spring 411. At the same time, the lower reset spring 412 is located on the left side of the lower step 414, and the lower push rod 404 is indirectly connected to the front axle 1 only through the lower reset spring 412. When parking braking is performed, the upper push rod 402 moves to the left, and the upper reset spring 411 is compressed. When the parking brake is cancelled, the upper push rod 402 is reset under the action of the upper reset spring 411. Similarly, when decoupling braking is performed, the lower push rod 404 moves to the left, and the lower reset spring 412 is compressed. When the decoupling brake is cancelled, the lower push rod 404 is reset under the action of the lower reset spring 412. After the upper push rod 402 and the lower push rod 404 are reset simultaneously, the brake pull rod 401 no longer pulls the rocker arm 410 of the brake 406, and the brake 406 can reset itself. At this time, both ends of the upper reset spring 411 only need to abut against the front axle 1 and the upper step 413 respectively to achieve reset, and of course, they can also be fixedly connected. Similarly, both ends of the lower reset spring 412 only need to abut against the front axle 1 and the lower step 414 respectively to achieve reset, and of course, they can also be fixedly connected. The brake 406 can adopt a drum brake 406, and its structure is prior art, which can achieve self-reset without external force. For example, a torsion spring is provided at the rotating shaft of some drum brakes 406, and the rocker arm 410 can be reset through the torsion spring when it is not affected by external force, which will not be elaborated here. The mechanisms of parking braking, decoupling braking and resetting all adopt a pure mechanical structure and do not require external power supply.

[0034] Of course, those skilled in the art can think that the upper reset spring 411 can also be located on the right side of the upper step 413, and the lower reset spring 412 is located on the right side of the lower step 414. When parking braking is performed, the upper push rod 402 moves to the left, and the upper reset spring 411 is stretched. When the parking brake is cancelled, the upper push rod 402 is reset under the action of the upper reset spring 411. When decoupling braking is performed, the lower push rod 404 moves to the left, and the lower reset spring 412 is stretched. When the decoupling brake is cancelled, the lower push rod 404 is reset under the action of the lower reset spring 412. At this time, both ends of the upper reset spring 411 need to be fixedly connected to the front axle 1 and the upper step 413 respectively, and both ends of the lower reset spring 412 need to be fixedly connected to the front axle 1 and the lower step 414 respectively.

[0035] Of course, the reset component can also be arranged such that the upper reset spring 411 is disposed on the left side of the upper step 413, and the lower reset spring 412 is disposed on the right side of the lower step 414. Alternatively, the upper reset spring 411 is disposed on the right side of the upper step 413, and the lower reset spring 412 is disposed on the left side of the lower step 414. Designers can design according to actual situations.

[0036] In this embodiment, based on Figures 1 to 3 As shown, a transverse mounting cylinder 5 is fixedly connected to the front axle 1, and the front pull rod 407 is covered within the transverse mounting cylinder 5 to achieve protection. Both the upper connecting rod 403 and the lower connecting rod 405 are hinged to the side wall of the transverse mounting cylinder 5 to achieve indirect hinging to the front axle 1. An upper mounting edge 501 is provided on the outer side wall of the top of the transverse mounting cylinder 5. The upper push rod 402 is located outside the top of the transverse mounting cylinder 5. The end of the upper reset spring 411 away from the upper step 413 is connected to the upper mounting edge 501 to achieve indirect connection to the front axle 1. A lower mounting edge 502 is provided on the outer side wall of the bottom of the transverse mounting cylinder 5. The lower push rod 404 is located outside the bottom of the transverse mounting cylinder 5. The end of the lower reset spring 412 away from the lower step 414 is connected to the lower mounting edge 502 to achieve indirect connection to the front axle 1.

[0037] Furthermore, based on Figure 3As shown, the upper push rod 402 includes a first upper rod body 415 and a second upper rod body 416 whose ends are threadedly connected to each other. A threaded hole can be provided on the first upper rod body 415, and the second upper rod body 416 is provided with a threaded post that is screwed into the threaded hole. Alternatively, a threaded hole can be provided on the second upper rod body 416, and the first upper rod body 415 is provided with a threaded post that is screwed into the threaded hole. The end of the first upper rod body 415 away from the second upper rod body 416 is hinged to the upper connecting rod 403, and the mop 2 can be rotated upward and abutted against the end of the second upper rod body 416 away from the first upper rod body 415. Since the movement of the second upper rod body 416 is relatively free and it can rotate axially, by adjusting the screwing distance between the first upper rod body 415 and the second upper rod body 416, the length of the upper push rod 402 can be finely adjusted. Similarly, the lower push rod 404 includes a first lower rod body 417 and a second lower rod body 418 whose ends are threadedly connected to each other. A threaded hole can be provided on the first lower rod body 417, and the second lower rod body 418 is provided with a threaded post that is screwed into the threaded hole. Alternatively, a threaded hole can be provided on the second lower rod body 418, and the first lower rod body 417 is provided with a threaded post that is screwed into the threaded hole. The end of the first lower rod body 417 away from the second lower rod body 418 is hinged to the lower connecting rod 405, and the mop 2 can be rotated downward and abutted against the end of the second lower rod body 418 away from the first lower rod body 417. Since the movement of the second lower rod body 418 is also relatively free and it can rotate axially, by adjusting the screwing distance between the first lower rod body 417 and the second lower rod body 418, the length of the lower push rod 404 can be finely adjusted. By finely adjusting the lengths of the upper push rod 402 and the lower push rod 404 as described above, fine adjustment of the parking brake effect and the unhooking brake effect can be achieved, and the structure is simple and the operation is convenient.

[0038] Based on Figure 4 As shown, the rear pull rod 409 includes an adjusting nut 419, a first rear rod body 420 and a second rear rod body 421. Connecting walls 422 and external threaded posts 423 are respectively provided at the ends of the first rear rod body 420 and the second rear rod body 421. Specifically, the connecting wall 422 can be provided on the first rear rod body 420 and the external threaded post 423 can be provided on the second rear rod body 421, or alternatively, the connecting wall 422 can be provided on the second rear rod body 421 and the external threaded post 423 can be provided on the first rear rod body 420. The connecting wall 422 is provided with a connecting hole 424. The external threaded post 423 passes through the connecting hole 424 and the first rear rod body 420 and the second rear rod body 421 are fixedly connected by screwing the adjusting nut 419. The end of the first rear rod body 420 away from the second rear rod body 421 is hinged to the rocker arm 410, and the end of the second rear rod body 421 away from the first rear rod body 420 is fixedly connected to the chain body 408. By rotating the adjusting nut 419, fine adjustment of the length of the rear pull rod 409 can be achieved, thereby finely adjusting the braking effect, and the adjustment structure is also simple and convenient.

[0039] Based on Figure 4As shown, the braking mechanism 4 further includes an adjusting pin 425. The rocker arm 410 is radially provided with a plurality of pin holes 426 along its rotating shaft, such as four or five. The adjusting pin 425 is installed on the rear pull rod 409 and passes through any of the pin holes 426. Specifically, it can be installed on the cross beam 7 to be indirectly connected to the rear pull rod 409. By aligning different pin holes 426 with the rear pull rod 409, the rough adjustment of the orientation of the brake 406 is realized, so as to roughly adjust the braking effect. Those skilled in the art can foresee that the end of the adjusting pin 425 can be bent or provided with a screwed nut or the like to prevent the pin from falling off.

[0040] Further, the chain body 408 has a plurality of chain links that are linearly connected in sequence and are detachable from each other (not shown in the drawings), that is, the chain body 408 adopts a common chain structure. The detachable chain link structure is prior art and will not be elaborated here. After adjusting the positions of the upper push rod 402, the lower push rod 404, the rear pull rod 409 and the adjusting pin 425 as described above to achieve fine adjustment and rough adjustment of the braking effect, the length of the chain body 408 can be adaptively adjusted by adjusting the number of chain links to compensate for the positions of various components and ensure the continuity of the overall structure.

[0041] Further, based on Figure 5 and Figure 6 As shown, it further includes a parking brake pedal 6, and the front axle 1 is provided with a clamp 101. The middle of the parking brake pedal 6 is hinged to the mop 2. One end of the parking brake pedal 6 is provided with a foot pedal 601, and the other end of the parking brake pedal 6 is provided with a hook 602 that is rotatably hooked on the clamp 101. After the mop 2 is rotated upward to the parking brake position, by stepping on the foot pedal 601, the hook 602 is hooked on the clamp 101 to realize the locking of the mop 2. When canceling the brake, by stepping on the foot pedal 601, the hook 602 is disengaged from the clamp 101.

[0042] The front axle 1 is installed with an electromagnet 102, and a tongue piece 603 adsorbed on the electromagnet 102 is provided on one side of the parking brake pedal 6 close to the hook 602. When performing parking brake, step on the foot pedal 601 to make the parking brake pedal 6 rotate counterclockwise ( Figure 6 in the direction shown), and after releasing the foot pedal 601, the electromagnet 102 adsorbs the tongue piece 603 to make the parking brake pedal 6 rotate clockwise, and the hook 602 is hooked on the clamp 101. By stepping on the foot pedal 601 forcefully, the electromagnet 102 can be separated from the tongue piece 603, and the hook 602 is disengaged from the clamp 101.

[0043] Further, based on Figure 3As shown, a top abutting block 201 is fixedly connected to the side wall of the mop 2 above its rotating shaft. The top abutting block 201 rotatably abuts against the end of the upper push rod 402 far from the upper connecting rod 403 to push the upper push rod 402 to move leftward. The mop 2 is fixedly connected with a bottom abutting block 202 extending below its rotating shaft. The bottom abutting block 202 rotatably abuts against the end of the lower push rod 404 far from the lower connecting rod 405 to drive the lower push rod 404 to move leftward.

[0044] The working principle of this embodiment: Based on Figures 2 to 4 As shown in the direction, when parking braking is required, rotate the mop 2 upward. The top abutting block 201 on the mop 2 abuts against the end of the upper push rod 402 and drives the upper push rod 402 to move leftward. The upper return spring 411 is compressed. The upper push rod 402 drives the upper connecting rod 403 to rotate counterclockwise and drives the brake pull rod 401 to move rightward. The brake pull rod 401 pulls the rocker arm 410 to rotate clockwise, so that the side wall of the brake 406 abuts against the wheel 3 to achieve parking braking. By stepping on the foot pedal 601, the hook 602 on the parking brake pedal 6 hooks the clamp 101 to keep the position of the mop 2. The electromagnet 102 adsorbs the tongue piece 603 to ensure the stability of the parking brake pedal 6. When it is necessary to disengage from the parking brake state, by stepping on the foot pedal 601, the tongue piece 603 is separated from the electromagnet 102, the hook 602 disengages from the clamp 101, the mop 2 rotates downward, the upper push rod 402 is reset under the action of the upper return spring 411, the upper push rod 402 drives the upper connecting rod 403 to rotate clockwise and reset, and drives the front pull rod 407 to move leftward and reset. The brake 406 resets itself and drives the rear pull rod 409 to reset. When unhooking and braking, the mop 2 rotates downward. The bottom abutting block 202 on the mop 2 abuts against the end of the lower push rod 404 and drives the lower push rod 404 to move leftward. The lower return spring 412 is compressed. The lower push rod 404 drives the lower connecting rod 405 to rotate clockwise and drives the brake pull rod 401 to move rightward. The brake pull rod 401 pulls the rocker arm 410 to rotate clockwise, so that the side wall of the brake 406 abuts against the wheel 3 to achieve unhooking and braking. By lifting the mop 2, the bottom abutting block 202 is separated from the lower push rod 404. The lower push rod 404 is reset under the action of the lower return spring 412. The lower push rod 404 drives the lower connecting rod 405 to rotate counterclockwise and reset, and drives the front pull rod 407 to move leftward and reset. The brake 406 resets itself and drives the rear pull rod 409 to reset. When the top abutting block 201 is separated from the upper push rod 402 and the bottom abutting block 202 is separated from the lower push rod 404, the trailer can travel normally. Since the front pull rod 407 and the rear pull rod 409 are connected by a chain body 408, when vibration occurs, the chain body 408 reduces the influence when being vibrated through a certain contraction and swing, ensures the stability of the parking system and reduces fatigue damage.

[0045] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A decoupling brake and parking brake system for a trailer, comprising a front axle (1), a mop (2) and a braking mechanism (4). Wheels (3) are installed at both ends of the front axle (1). The bottom end of the mop (2) is rotatably connected to the front end of the front axle (1). The braking mechanism (4) is equipped with a reset component for disengaging from the braking state. It is characterized in that: The braking mechanism (4) includes a brake pull rod (401), an upper push rod (402), an upper connecting rod (403), a lower push rod (404), a lower connecting rod (405) and a brake (406). The brake pull rod (401) includes a front pull rod (407), a chain body (408) and a rear pull rod (409) fixedly connected in sequence at the end. The middle of the upper connecting rod (403) is hinged to the front axle (1). The bottom end of the upper connecting rod (403) is hinged to the front pull rod (407). The top end of the upper connecting rod (403) is hinged to the end of the upper push rod (402). The upper push rod (402) is movably installed on the front axle (1). The mop (2) can rotate upward and abut against the end of the upper push rod (402) away from the upper connecting rod (403). The middle of the lower connecting rod (405) is hinged to the front axle (1). The top end of the lower connecting rod (405) is hinged to the front pull rod (407). The bottom end of the lower connecting rod (405) is hinged to the end of the lower push rod (404). The lower push rod (404) is movably installed on the front axle (1). The mop (2) can rotate downward and abut against the end of the lower push rod (404) away from the lower connecting rod (405). The brake (406) is hinged to the front axle (1). The brake (406) has a rocker arm (410). The rocker arm (410) is hinged to the rear pull rod (409). The side wall of the brake (406) can rotatably abut against the wheel (3).

2. The decoupling braking and parking braking system for a trailer according to claim 1, wherein: The reset components include an upper reset spring (411) and a lower reset spring (412). An upper step (413) is provided on the outer side wall of the upper push rod (402). The upper reset spring (411) is sleeved on the outer side of the upper push rod (402). The two ends of the upper reset spring (411) are respectively connected to the front axle (1) and the upper step (413). A lower step (414) is provided on the side wall of the lower push rod (404). The lower reset spring (412) is sleeved on the outer side of the lower push rod (404). The two ends of the lower reset spring (412) are respectively connected to the front axle (1) and the lower step (414).

3. The decoupling braking and parking braking system for a trailer according to claim 2, characterized in that: A transverse mounting cylinder (5) is fixedly connected to the front axle (1). The front pull rod (407) is covered in the transverse mounting cylinder (5). Both the upper connecting rod (403) and the lower connecting rod (405) are hinged to the side wall of the transverse mounting cylinder (5). On the outer side wall of the top of the horizontally installed cylinder (5), there is an upper mounting edge (501). The upper push rod (402) is located outside the top of the horizontally installed cylinder (5). The end of the upper return spring (411) away from the upper step (413) is connected to the upper mounting edge (501). On the outer side wall of the bottom of the horizontally installed cylinder (5), there is a lower mounting edge (502). The lower push rod (404) is located outside the bottom of the horizontally installed cylinder (5). The end of the lower return spring (412) away from the lower step (414) is connected to the lower mounting edge (502).

4. The decoupling braking and parking braking system for a trailer according to claim 1, characterized in that: The upper push rod (402) includes a first upper rod body (415) and a second upper rod body (416) whose ends are threadedly connected to each other. The end of the first upper rod body (415) away from the second upper rod body (416) is hinged to the upper connecting rod (403). The mop (2) can rotate upward and abut against the end of the second upper rod body (416) away from the first upper rod body (415). The lower push rod (404) includes a first lower rod body (417) and a second lower rod body (418) whose ends are threadedly connected to each other. The end of the first lower rod body (417) away from the second lower rod body (418) is hinged to the lower connecting rod (405). The mop (2) can rotate downward and abut against the end of the second lower rod body (418) away from the first lower rod body (417).

5. The trailer decoupling brake and parking brake system according to claim 1, characterized in that: The brake (406) adopts a drum brake (406).

6. The decoupling braking and parking braking system for a trailer according to claim 1, characterized in that: The rear pull rod (409) includes an adjusting nut (419), a first rear rod body (420), and a second rear rod body (421). At the ends of the first rear rod body (420) and the second rear rod body (421), there are respectively provided a connecting wall (422) and an external threaded column (423). The connecting wall (422) is provided with a connecting hole (424). The external threaded column (423) passes through the connecting hole (424), and the first rear rod body (420) and the second rear rod body (421) are fixedly connected by screwing the adjusting nut (419). The end of the first rear rod body (420) away from the second rear rod body (421) is hinged to the rocker arm (410). The end of the second rear rod body (421) away from the first rear rod body (420) is fixedly connected to the chain body (408).

7. The decoupling braking and parking braking system for a trailer according to claim 1, characterized in that: The braking mechanism (4) further includes an adjusting pin (425). The rocker arm (410) is provided with a plurality of pin holes (426) radially along its rotating shaft. The adjusting pin (425) is installed on the rear pull rod (409) and passes through any of the pin holes (426).

8. The decoupling braking and parking braking system for a trailer according to claim 1, characterized in that: The chain body (408) has a plurality of chain links that are linearly connected in sequence and are detachable from each other.

9. The decoupling braking and parking braking system for a trailer according to claim 1, characterized in that: It further includes a parking brake pedal (6), and a clamp (101) is provided on the front axle (1); the middle of the parking brake pedal (6) is hinged to the mop (2), one end of the parking brake pedal (6) is provided with a foot pedal (601), and the other end of the parking brake pedal (6) is provided with a hook (602) rotatably hooked to the clamp (101); an electromagnet (102) is installed on the front axle (1), and a tongue (603) adsorbed to the electromagnet (102) is provided on one side of the parking brake pedal (6) close to the hook (602).

10. The decoupling brake and parking brake system for a trailer according to claim 1, characterized in that: A top block (201) is fixedly connected to the side wall of the mop (2) above its rotating shaft, and the top block (201) rotatably abuts against the end of the upper push rod (402) far from the upper connecting rod (403); a bottom block (202) extending below the rotating shaft of the mop (2) is fixedly connected to the mop (2), and the bottom block (202) rotatably abuts against the end of the lower push rod (404) far from the lower connecting rod (405).

Images