CN216684212U - Buffer piece of automatic opening and closing mechanism of rear door of dump truck - Google Patents

Abstract

The utility model discloses a buffer piece of a rear door automatic opening and closing mechanism of a dump truck, which comprises a lock hook provided with a buffer device, wherein impact force is prevented from being directly applied to a lock chain, the service life of the lock chain is prolonged, when the dump truck is in a cargo transportation process, a rear door is impacted by cargoes, the rear door impacts the lock hook, the buffer device on the lock hook absorbs most impact force, the residual impact force enables the lock hook to generate a pulling force on the lock chain, a first spring is compressed under the action of the pulling force to absorb the residual impact force, flexible locking is formed between the whole automatic opening and closing mechanism and the rear door, the buffer device is matched with the first spring to realize multiple buffer functions, the phenomenon of chain fracture is avoided, the practicability is better, and the service life and the safety of the rear door automatic opening and closing mechanism of the dump truck are enhanced.

Description

Buffer piece of automatic opening and closing mechanism of rear door of dump truck

Technical Field

The utility model relates to the technical field of matching devices of dump trucks, in particular to a buffer piece of an automatic opening and closing mechanism of a rear door of a dump truck.

Background

The dump truck refers to a vehicle which unloads cargos by self through hydraulic or mechanical lifting. The automatic power-taking device consists of an automobile chassis, a hydraulic lifting mechanism, a cargo compartment, a power-taking device, an automatic opening and closing device and the like. The performance requirement to the automatic mechanism that opens and shuts of tipper back door is higher and higher, and the switching of current tipper back door adopts drag link or the automatic latch hook device of chain formula mostly, and to the automatic latch hook device of chain formula, under the not good condition of road conditions, it is difficult to avoid the internal material striking back door plant of railway carriage or compartment completely, and the phenomenon that the back door locking pull rod chain was broken by the pulling often takes place, causes the material to spill the circumstances emergence such as, and the security performance is poor.

Disclosure of Invention

In order to solve the problems, the utility model discloses a buffer piece of a rear door automatic opening and closing mechanism of a dump truck, which has a simple structure and multiple buffers.

In order to achieve the purpose, the utility model provides a buffer piece for an automatic opening and closing mechanism of a rear door of a dump truck, which comprises a latch hook provided with a buffer device, wherein the latch hook is hinged with a latch hook seat, the latch hook seat is fixedly arranged at the bottom end of the tail part of a carriage body of the dump truck, the latch hook is connected with one end of a lock chain, the other end of the lock chain is connected with a large shifting fork fixing seat through a large shifting fork, the large shifting fork fixing seat is fixedly arranged at the bottom of the dump truck, the height of the large shifting fork fixing seat is lower than that of the latch hook seat, one end of the large shifting fork, which is far away from the lock chain, is a pin shaft, the free end of the pin shaft is provided with a pretightening nut, a first spring is sleeved on the pin shaft between the pretightening nut and the large shifting fork fixing seat, a first groove is arranged on the contact surface of the latch hook and the rear door of the dump truck, the buffer device is arranged in the first groove, and a second groove matched with the buffer mechanism is arranged on the rear door of the dump truck.

Furthermore, the buffer device comprises a buffer shell, the opening end of the buffer shell is inserted into the first groove, and a plurality of buffer units are arranged between the buffer shell and the first groove; the plurality of buffer units make the buffer device more stable.

Further, the buffer unit is including setting up in the support section of thick bamboo of first recess bottom, and the open end of a support section of thick bamboo is equipped with inside spacing bulge loop, be equipped with on the buffering shells inner wall with support a assorted bracing piece, the bracing piece is pegged graft and is equipped with spacing lug in the one end of supporting a section of thick bamboo, is equipped with the second spring in the support section of thick bamboo, and a support section of thick bamboo and bracing piece overcoat are equipped with the third spring, set up the second spring and provide dual buffer power with the third spring, avoid the unable normal condition of working of a certain spring inefficacy, and the practicality is good.

Furthermore, a plurality of guide grooves are formed in the contact surface of the buffer shell and the first groove, a plurality of guide blocks are inwards arranged at the opening end of the first groove, the guide blocks are arranged in the guide grooves and move in a limiting mode in the direction perpendicular to the contact surface of the latch hook and the rear door of the dump truck, the buffer shell is better connected with the latch hook, the buffer shell moves in a limiting mode, and the rear door is buffered.

Further, the third spring abuts against the bottom of the first groove and the inner wall of the buffer shell; the buffer shell is reset, and the situation that the second spring fails to work normally is avoided.

Furthermore, a gap is reserved between the lock hook and the rear door of the dump truck, and the buffer shell is abutted to the second groove; giving a pretightening force to the rear door of the dump truck, and giving a buffer space to the rear door after the rear door shakes, so that the stress of the chain is reduced.

Compared with the prior art, the utility model has the following advantages and beneficial effects:

the buffer piece for the automatic opening and closing mechanism of the rear door of the dump truck comprises the latch hook provided with the buffer device, so that impact force is prevented from being directly applied to a chain, the service life of the chain is prolonged, the buffer device is matched with the first spring to realize multiple buffer functions, the phenomenon of chain fracture is avoided, the practicability is better, and the service life and the safety of the automatic opening and closing mechanism of the rear door of the dump truck are enhanced.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view of portion A of FIG. 1 in accordance with the present invention;

description of reference numerals:

1. a compartment body; 2. a rear door of the dump truck; 3. a latch hook seat; 4. a latch hook; 5. a chain; 6. a large shifting fork fixing seat; 7. a large shifting fork; 8. a first spring; 9. a second groove; 10. a first groove; 11. a buffer shell; 12. a support cylinder; 13. a support bar; 14 a third spring; 15. a second spring; 16. a guide groove; 17. a guide block; 18. a limiting bump; 19. a limit convex ring.

Detailed Description

The technical solutions provided by the present invention will be described in detail below with reference to specific examples, and it should be understood that the following specific embodiments are only illustrative of the present invention and are not intended to limit the scope of the present invention. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

Example (b): as shown in fig. 1 to 2, a damper for a rear door 2 of a dump truck automatic opening and closing mechanism comprises a latch hook 4 provided with a damping mechanism, the latch hook 4 is hinged to a latch hook seat 3, the latch hook seat 3 is fixedly arranged at the bottom end of the tail of a carriage body 1 of the dump truck, the latch hook 4 is connected with one end of a lock chain 5, the other end of the lock chain 5 is connected with a large shift fork fixing seat 6 through a large shift fork 7, the large shift fork fixing seat 6 is fixed at the bottom of the dump truck, the height of the large shift fork fixing seat 6 is lower than that of the latch hook seat 3, one end of the large shift fork 7, which is far away from the lock chain 5, is a pin shaft, the free end of the pin shaft is provided with a pre-tightening nut, a first spring 8 is sleeved on the pin shaft between the pre-tightening nut and the large shift fork fixing seat 6, a first groove 10 is arranged on the contact surface of the latch hook 4 and the rear door 2 of the dump truck, a damping mechanism is arranged in the first groove 10, and a second groove 9 matched with the damping mechanism is arranged on the rear door 2; a gap is reserved between the latch hook 4 and the rear door 2 of the dump truck, and the buffer shell 11 is abutted to the second groove 9.

The buffer device comprises a buffer shell 11, the open end of the buffer shell 11 is inserted into the first groove 10, a plurality of guide grooves 16 are arranged on the contact surface of the buffer shell 11 and the first groove 10, a plurality of guide blocks 17 are inwards arranged at the open end of the first groove 10, the guide blocks 17 are arranged in the guide grooves 16 and move in a limiting manner along the direction vertical to the contact surface of the latch hook 4 and the rear door 2 of the dump truck, and a plurality of buffer units are arranged between the buffer shell 11 and the first groove 10; the buffer unit comprises a support cylinder 12 arranged at the bottom of the first groove 10, an inward limiting convex ring 19 is arranged at the opening end of the support cylinder 12, a support rod 13 matched with the support cylinder 12 is arranged on the inner wall of the buffer shell 11, a limiting convex block 18 is arranged at one end of the support rod 13 inserted in the support cylinder 12, a second spring 15 is arranged in the support cylinder 12, and a third spring 14 is sleeved outside the support cylinder 12 and the support rod 13; the third spring 14 abuts against the bottom of the first groove 10 and the inner wall of the buffer shell 11;

the working principle is as follows: the utility model relates to a buffer piece of an automatic opening and closing mechanism of a rear door 2 of a dump truck, which is characterized in that when the buffer piece works, the tail part of a box body moves downwards, the distance between the tail part of the box body 1 and a large shifting fork fixing seat 6 is shortened, the tension of a lock chain 5 on a lock hook 4 is failed, the lock hook 4 rotates around the lock hook seat 3 under the action of gravity, the rear door 2 is opened, goods slide down, after the goods are unloaded, the tail part of the box body 1 moves upwards, after the goods are moved upwards to a certain height, the lock chain 5 is tightened, the lock hook 4 is pulled to rotate upwards around the lock hook seat 3, the lock hook 4 pushes the rear door 2 to move upwards until the lock hook 4 locks the rear door 2, when the dump truck is in the goods transportation process, the rear door 2 is impacted by the goods, a buffer device on the lock hook 4 absorbs most of impact force, the residual impact force causes the lock hook 4 to generate a tension on the lock chain 5, a first spring 8 is compressed under the action of the tension force to absorb the residual impact force, flexible locking is formed between the whole automatic opening and closing mechanism and the rear door 2, the phenomenon that the chain 5 is broken is avoided, the practicability is better, and the service life and the safety of the automatic opening and closing mechanism of the rear door 2 of the dump truck are prolonged.

Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that various modifications can be made to the embodiments described in the foregoing embodiments, or some or all of the technical features of the embodiments can be equivalently replaced, and the modifications or the replacements do not make the essence of the corresponding technical solutions depart from the scope of the embodiments of the present invention.

Claims (6)

1. The utility model provides a buffer piece of automatic mechanism that opens and shuts of tipper back door, a serial communication port, including the latch hook that is equipped with buffer, the latch hook is articulated with the latch hook seat, the latch hook seat is fixed to be set up in tipper railway carriage or compartment afterbody bottom, the one end of chain is connected to the latch hook, the other end of chain is connected with big shift fork fixing base through big shift fork, big shift fork fixing base is fixed in the tipper bottom, the height that highly is less than the latch hook seat of big shift fork fixing base, the one end that the chain was kept away from to big shift fork is the round pin axle, the free end of round pin axle is equipped with the nut pretightening, the round pin epaxial cover between nut pretightening and big shift fork fixing base is equipped with first spring, be equipped with first recess on latch hook and the tipper back door contact surface, be equipped with buffer in the first recess, be equipped with buffer assorted second recess on the tipper back door.

2. The buffer member for the automatic opening and closing mechanism of the rear door of the dump truck as claimed in claim 1, wherein the buffer device comprises a buffer housing, the open end of the buffer housing is inserted into the first groove, and a plurality of buffer units are disposed between the buffer housing and the first groove.

3. The buffer member of claim 2, wherein the buffer unit comprises a support cylinder disposed at the bottom of the first groove, the opening end of the support cylinder is provided with an inward-facing limit protruding ring, the inner wall of the buffer housing is provided with a support rod matching with the support cylinder, the end of the support rod inserted into the support cylinder is provided with a limit protruding block, the support cylinder is provided with a second spring, and the support cylinder and the support rod are sleeved with a third spring.

4. The buffer member for the automatic opening and closing mechanism of the rear door of the dump truck as claimed in claim 2, wherein a plurality of guide grooves are formed on a contact surface of the buffer housing and the first groove, a plurality of guide blocks are inwardly arranged at an opening end of the first groove, and the guide blocks are arranged in the guide grooves and move in a limiting manner in a direction perpendicular to a contact surface of the latch hook and the rear door of the dump truck.

5. The damper for the automatic opening and closing mechanism of the rear door of the dump truck as claimed in claim 3, wherein the third spring abuts against the bottom of the first groove and the inner wall of the damping shell.

6. The damper for the automatic opening and closing mechanism of the rear door of the dump truck as claimed in claim 2, wherein a gap is formed between the latch hook and the rear door of the dump truck, and the damper housing abuts against the second groove.

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