Semitrailer safety locking device with self-discharging booster

Abstract

The utility model relates to the technical field of semitrailers, and discloses a semitrailer safety locking device with a self-discharging booster, which comprises a frame, an unloader and a carriage, a turning plate is hinged to the carriage, a first pin shaft is fixedly mounted on the lower side of the frame, a locking claw is hinged to the first pin shaft, a lock hook is hinged to the right portion of the lower side of the frame, and the lock hook is made of carbon steel and is in a C shape. A spring is fixedly installed on the lower side of the frame, the upper end face of the spring is fixedly connected with the lower surface of the lock hook, a locking block is fixedly arranged on the side face of the turning plate, a limiting clamp is hinged to the right portion of the lower side of the frame, the limiting clamp is composed of a blocking column, a pressing column and a transverse column and is made of steel, and the blocking block is fixedly arranged on the side face of the lock hook. According to the turnover plate unlocking device, the transverse column of the limiting clamp rotates downwards to extrude the tail of the lock hook in the downward swinging process of the lock claw, the function of unlocking the turnover plate is achieved, and the effect that the load gravity center of a truck bed inclines backwards conveniently to discharge materials is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of semi-trailers, in particular to a safety locking device for a semi-trailer with a dump booster. Background Art

[0002] The mechanical locking device of the current small four-wheel tractor semi-trailer is composed of a locking seat, a locking pin and a return spring. This locking device can only lock the semi-trailer box and cannot unload automatically; therefore, when unloading, the load in front of the semi-trailer wheel axis must be unloaded first, and after the load center of gravity moves to the rear side of the semi-trailer wheel axis, the locking device is opened to tilt the semi-trailer box backwards, and the tractor is driven backward to achieve unloading; or the locking device is opened first, and then multiple people lift the front side of the semi-trailer box to cause the load center of gravity to move to the rear side of the semi-trailer axis, and the tractor is driven backward to achieve unloading.

[0003] The Chinese New Utility Patent Application No. 201720983268.0 discloses a semi-trailer locking device with a dump booster to solve the problem that the prior art cannot provide a certain bottom support during the automatic lifting and lowering process of the semi-trailer, which may cause the vehicle body to tilt forward due to imbalance, and the safety performance and stability are insufficient. With respect to the above-mentioned related technologies, the inventor believes that there are the following defects:

[0004] 1. When the locking device is manually opened, the front end of the semi-trailer is lifted by the dump booster, and the center of gravity of the load is moved to the rear side of the semi-trailer axis. The work intensity is high, and the driver needs to pay attention to the unlocking staff to leave the rear of the trailer before tilting the car box for unloading, which increases the work steps and consumes the time waiting for the staff to leave;

[0005] 2. When the dump booster is lifting the trailer box, even if the locking device is opened and the frame baffle has a discharge port to unload materials such as sand, the opening size of the flap is not fixed due to shaking and other factors after the locking device is opened, and the flap cannot be limited. There is a risk of collision when the unloaded materials push the flap. If the flap is limited manually, it is necessary to use a pin to find the socket to fix it, which is more troublesome to operate. Utility Model Content

[0006] In view of the deficiencies in the prior art, the utility model provides a semi-trailer safety locking device with a dump booster, which has the advantages of opening the locking device on the front side of the semi-trailer box and increasing the opening range of the flap, thereby solving the problems described in the background technology.

[0007] The utility model provides the following technical solutions:

[0008] A safety locking device for a semitrailer with a dump booster comprises a frame, an unloader and a car box, the car box is hinged with a flap, a first pin is fixedly installed on the lower side of the frame, a locking claw is hinged on the first pin, the end face of the locking claw is fork-shaped, a locking hook is hinged on the right part of the lower side of the frame, a spring is fixedly installed on the lower side of the frame, the upper end face of the spring is fixedly connected to the lower surface of the locking hook, a locking block is fixedly arranged on the side of the flap, a limiting clamp is hinged on the right part of the lower side of the frame, the limiting clamp is located between the positions of the locking claw and the locking hook, a stopper is fixedly arranged on the side of the locking hook, and the stopper contacts the right side face of the limiting clamp.

[0009] Preferably, a first supporting pulley is fixedly provided at the lower end of the left side of the vehicle box, an I-shaped column is fixedly provided on the left side of the frame, a rocker arm is movably installed on the side of the I-shaped column, a second supporting pulley is fixedly provided at the upper end of the left side of the vehicle box, a diagonal support pulley is fixedly provided at the upper end of the right side of the vehicle box, an annular pad is fixedly provided at the output end of the unloader, a steel wire rope is fixedly provided on the right side of the annular pad, one end of the steel wire rope is fixedly connected to the flap, and the outer surface of the steel wire rope is slidably connected to the outer surfaces of the first pin shaft, the first supporting pulley, the rocker arm, the second supporting pulley and the diagonal support pulley.

[0010] Preferably, a motor is fixedly provided on the upper end of the first supporting pulley, and the motor drives the rotation of the rocker arm.

[0011] Preferably, the swing arm is provided with a slide groove, and a rotating pulley is arranged on the slide groove, and the surface of the pulley contacts the surface of the wire rope.

[0012] Preferably, a hinge seat is fixedly provided at the upper end of the right side of the vehicle box, and the upper surface of the hinge seat is fixedly connected to the lower surface of the diagonal support pulley.

[0013] Preferably, a second pin is fixedly provided on the lower side of the frame, and the second pin is movably mounted on the lower surface of the middle portion of the locking hook.

[0014] Preferably, a steel wire rope is wound around the first pin shaft, one side of the locking claw is fixedly mounted to the first pin shaft, and the movement direction of the locking claw is the same as the movement direction of the first pin shaft.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] 1. In the utility model, the locking claw is arranged to make the horizontal column of the limit clamp rotate downward to squeeze the tail of the lock hook during the downward swinging process, the stop column of the limit clamp is no longer limited and tilted upward, and the lock hook tilts upward and no longer engages the lock block, thereby completing the unlocking function of the flap, realizing that the hinged part of the flap and the car box is in a movable state, and replacing the effect of manual unlocking work;

[0017] 2. In the utility model, the steel wire rope slides on the outer surfaces of the first pin shaft, the first supporting pulley, the rocker arm, the second supporting pulley and the diagonal supporting pulley, so that the steel wire rope adjusts the connection direction and finally the flap fixed by the steel wire rope is lifted along with the semi-trailer body of the car body. The larger the gap opened by the flap during the upward lifting of the left side of the car body, the less manual support is needed to open the flap to avoid shaking and hitting other parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the planar structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the utility model from a side view angle;

[0020] Figure 3 This is a schematic diagram of the locking claw structure of the utility model;

[0021] Figure 4 It is a schematic diagram of the swing rod structure of the utility model.

[0022] In the figure: 1. frame; 2. unloader; 3. flap; 4. first pin; 5. locking claw; 6. locking hook; 7. spring; 8. locking block; 9. limit clamp; 10. stopper; 11. first supporting pulley; 12. rocker arm; 13. second supporting pulley; 14. diagonal support pulley; 15. I-shaped column; 16. motor; 17. slide groove; 18. annular pad; 19. hinge seat; 20. carriage; 21. second pin; 22. wire rope. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Embodiment 1:

[0025] See also Figure 1-Figure 4A safety locking device for a semitrailer with a dump booster comprises a frame 1, an unloader 2, and a car box 20. The car box 20 is hinged with a flap 3. A first pin shaft 4 is fixedly installed on the lower side of the frame 1. A locking claw 5 is hinged on the first pin shaft 4. The end face of the locking claw 5 is fork-shaped. A locking hook 6 is hinged on the right part of the lower side of the frame 1. The locking hook 6 is made of carbon steel in a C shape, and its head and tail are semicircular. A spring 7 is fixedly installed on the lower side of the frame 1. The upper end face of the spring 7 is fixedly connected to the lower surface of the locking hook 6. A locking block 8 is fixedly arranged on the side of the flap 3. The spring 7 is in a potential energy state of popping up upward, so that the locking hook 6 passes through the arc surface of the locking hook 6 during the upward rotation process, and the flat part of the locking hook 6 is clamped with the locking block 8. A limit clip 9 is hinged on the right part of the lower side of the frame 1. The limit clip 9 is located between the positions of the locking claw 5 and the locking hook 6. The limiting clamp 9 is composed of a stop column, a pressure column and a cross column, and is made of steel. A stop block 10 is fixedly arranged on the side of the locking hook 6, and the stop block 10 contacts the right side surface of the limiting clamp 9. By setting the locking claw 5 to make the cross column of the limiting clamp 9 rotate downward to squeeze the tail of the locking hook 6 during the downward swinging process, the stop column of the limiting clamp 9 rotates upward and no longer limits the upward tilting position of the stop block 10, so that the locking hook 6 tilts upward obliquely without engaging the locking block 8, thereby completing the unlocking function of the flap 3, allowing the self-locking structure of the flap 3 to be opened during the displacement of the load center of gravity on the front side of the semi-trailer box, so that the hinged part of the flap 3 and the car box 20 is movable, which is convenient for the car box 20 to tilt the load center of gravity backward to discharge the material;

[0026] A second pin shaft 21 is fixedly provided on the lower side of the frame 1, and the second pin shaft 21 is movably installed with the lower surface of the middle position of the lock hook 6. By setting the second pin shaft 21 to hinge the lock hook 6, the middle support point of the lock hook 6 is determined, so that the tail of the lock hook 6 swings upward or the head swings upward;

[0027] The steel wire rope 22 wound on the first pin shaft 4 drives the rotation of the first pin shaft 4 during the extension and retraction process of the unloader 2. One side of the locking claw 5 is fixedly installed on the first pin shaft 4, and the movement direction of the locking claw 5 is the same as the movement direction of the first pin shaft 4. By setting the steel wire rope 22 to contact the surface of the first pin shaft 4, the rolling process of the first pin shaft 4 can be promoted, so that the upward or downward movement of the locking claw 5 can be used for unlocking or unlocking.

[0028] Embodiment 2:

[0029] See also Figure 1-Figure 4A first supporting pulley 11 is fixedly provided at the lower end of the left side of the car box 20, an I-shaped column 15 is fixedly provided on the left side of the frame 1, a swing rod 12 is movably installed on the side of the I-shaped column 15, and the swing rod 12 swings up and down at an angle driven by the I-shaped column 15, a second supporting pulley 13 is fixedly provided at the upper end of the left side of the car box 20, a diagonal support pulley 14 is fixedly provided at the upper end of the right side of the car box 20, an annular pad 18 is fixedly provided at the output end of the unloader 2, and a steel wire rope 22 is fixedly provided on the right side of the annular pad 18, one end of the steel wire rope 22 is fixedly connected to the flap 3, and its outer surface is connected to the first pin 4, the first supporting pulley 11, The outer surfaces of the swing arm 12, the second support pulley 13 and the diagonal support pulley 14 are slidably connected. By setting the wire rope 22 to adjust the connection direction during the oblique extension of the annular pad 18, the flap 3 fixedly connected by the wire rope 22 is finally lifted up along with the semi-trailer box 20, and the position of the flap 3 relative to the box 20 is also lifted upward, so that the larger the gap opened by the flap 3 during the upward lifting of the left side of the box 20, the easier it is to replace manual opening of a larger gap to unload the materials behind the axis of the semi-trailer faster, and there is no need to manually support the opening angle of the flap 3 to avoid shaking and hitting other parts;

[0030] A motor 16 is fixedly provided at the upper end of the first supporting pulley 11, and the motor 16 drives the swing rod 12 to rotate. By setting the output shaft of the motor 16 to drive the swing rod 12 to rotate, the inclination angle of the steel wire 22 to open the flap 3 is adjusted to increase the length of the steel wire 22 on the upper side of the car box 20;

[0031] The swing rod 12 is provided with a slide groove 17, and a rotating pulley is arranged on the slide groove 17, and the surface of the pulley contacts the surface of the steel wire 22. By arranging the pulley on the swing rod 12, the steel wire 22 is not hindered by the tilt angle position during the stretching or releasing process of the swing rod 12.

[0032] A hinge seat 19 is fixedly provided at the upper end of the right side of the car body 20, and the upper surface of the hinge seat 19 is fixedly connected to the lower surface of the diagonal support pulley 14. By setting the diagonal support pulley 14 to be inclined upward, it is possible to open the flap 3 at the inclined position to have a larger gap during the process of collecting the wire rope 22 to facilitate the discharge of materials.

[0033] Working principle:

[0034] When the unloader 2 is extended to lift the front side of the semi-trailer so that the center of gravity of the load is displaced and tilted backward, the locking claw 5 of the locking device swings downward to make the limit clamp 9 actively squeeze the tail of the locking hook 6 downward, and the locking hook 6 tilts upward and no longer engages the locking block 8; when the unloader 2 continues to extend, the steel wire rope 22 slides on the outer surface of the first pin shaft 4, the first supporting pulley 11, the rocker arm 12, the second supporting pulley 13 and the diagonal support pulley 14, and finally drives the flap 3 to be lifted upward relative to the car body 20, so that the greater the upward tilt of the semi-trailer car body, the greater the angle at which the flap 3 is opened, and the flap 3 is stretched by the steel wire rope 22 to avoid the risk of swinging too much and hitting.

Claims

1. A safety locking device for a semitrailer with a dump booster, comprising a frame (1), an unloader (2), and a vehicle box (20), characterized in that: The vehicle box (20) is hinged with a flap (3), a first pin shaft (4) is fixedly installed on the lower side of the frame (1), a locking claw (5) is hinged on the first pin shaft (4), the end face of the locking claw (5) is fork-shaped, a locking hook (6) is hinged on the right part of the lower side of the frame (1), a spring (7) is fixedly installed on the lower side of the frame (1), the upper end face of the spring (7) is fixedly connected to the lower surface of the locking hook (6), a locking block (8) is fixedly arranged on the side of the flap (3), a limiting clamp (9) is hinged on the right part of the lower side of the frame (1), the limiting clamp (9) is located between the positions of the locking claw (5) and the locking hook (6), a stopper (10) is fixedly arranged on the side of the locking hook (6), and the stopper (10) contacts the right side face of the limiting clamp (9).

2. A safety locking device for a semitrailer with a dump booster according to claim 1, characterized in that: A first supporting pulley (11) is fixedly provided at the lower end of the left side of the vehicle box (20), an I-shaped column (15) is fixedly provided on the left side of the vehicle frame (1), a swing rod (12) is movably installed on the side of the I-shaped column (15), a second supporting pulley (13) is fixedly provided at the upper end of the left side of the vehicle box (20), a diagonal support pulley (14) is fixedly provided at the upper end of the right side of the vehicle box (20), an annular pad (18) is fixedly provided at the output end of the unloader (2), a steel wire rope (22) is fixedly provided on the right side of the annular pad (18), one end of the steel wire rope (22) is fixedly connected to the flap (3), and the outer surface of the steel wire rope (22) is slidably connected to the outer surfaces of the first pin shaft (4), the first supporting pulley (11), the swing rod (12), the second supporting pulley (13) and the diagonal support pulley (14).

3. A safety locking device for a semitrailer with a dump booster according to claim 2, characterized in that: A motor (16) is fixedly arranged at the upper end of the first supporting pulley (11), and the motor (16) drives the swing rod (12) to rotate.

4. A safety locking device for a semitrailer with a dump booster according to claim 2, characterized in that: The swing rod (12) is provided with a slide groove (17), and a rotating pulley is arranged on the slide groove (17), and the surface of the pulley contacts the surface of the steel wire rope (22).

5. A safety locking device for a semitrailer with a dump booster according to claim 2, characterized in that: A hinge seat (19) is fixedly provided at the upper end of the right side of the vehicle box (20), and the upper surface of the hinge seat (19) is fixedly connected to the lower surface of the diagonal support pulley (14).

6. A safety locking device for a semitrailer with a dump booster according to claim 1, characterized in that: A second pin shaft (21) is fixedly arranged on the lower side of the vehicle frame (1), and the second pin shaft (21) is movably mounted on the lower surface of the middle position of the locking hook (6).

7. A safety locking device for a semitrailer with a dump booster according to claim 1, characterized in that: A steel wire rope (22) is wound around the first pin shaft (4), one side of the locking claw (5) is fixedly mounted on the first pin shaft (4), and the movement direction of the locking claw (5) is the same as the movement direction of the first pin shaft (4).

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