CN210311950U

CN210311950U - Packing box for draw arm vehicle

Info

Publication number: CN210311950U
Application number: CN201920613892.0U
Authority: CN
Inventors: 鲍一帆
Original assignee: Jiangsu Yinbao Special Vehicles Co ltd
Current assignee: Jiangsu Yinbao Special Vehicles Co ltd
Priority date: 2019-04-30
Filing date: 2019-04-30
Publication date: 2020-04-14
Anticipated expiration: 2029-04-30

Abstract

The utility model provides a container for a draw arm vehicle in the technical field of environmental sanitation equipment, which comprises a box body, wherein the upper part of the rear side of the box body is hinged with a closed door body, the closed door body can be attached to the rear side of the box body, two sides of the upper part of the closed door body in the left and right direction are respectively hinged with a linear driver, the linear driver is connected with a push-pull rod which obliquely extends downwards and can do reciprocating linear movement, and the outward side of the rear part of the box body is hinged with the push-pull rod; guide grooves are respectively formed in two sides of the closed door body, a lifting door capable of sliding along the guide grooves is connected in the closed door body, and an adjusting plate is rotatably connected to the lower portion of the lifting door; the front side of the box body is fixedly connected with a suspension bracket, the rear side of the suspension bracket is hinged with a push-pull driver, and a sliding door is slidably arranged in the box body; the utility model discloses can open and shut the closure body automatically, can be according to the degree of opening and shutting of the goods size control closure door body, it is more convenient to operate, can be according to the volume adjustment cavity size of goods or rubbish.

Description

Packing box for draw arm vehicle

Technical Field

The utility model relates to a sanitation equipment technical field, in particular to be used for with packing box that single arm-drag car cooperation was used.

Background

The draw arm vehicle of the sanitation vehicle is a common carriage detachable vehicle, the container structure used in cooperation with the draw arm vehicle comprises a box body, the rear side of the box body is detachably connected with a closed door body, one end of the closed door body is rotatably connected with the rear side of the box body in the left and right direction, the other end of the closed door body is connected with the box body through a lock pin, the box body is used for placing garbage or goods, when the garbage or goods are required to be placed in the box body, the lock pin is pulled out, the closed door body is opened, the goods or the garbage are placed in the box body, then the closed door body is closed, and the lock pin is inserted; the rotatable rollers are arranged on the lower side of the box body, and in the design, the cargo box needs to be manually opened and closed to form a closed door body, and the closed door body is opened and closed in the left and right directions, so that the space in the left and right directions is occupied, and the running of passing vehicles or pedestrians is influenced; meanwhile, the opening degree of the sealing door body cannot be adjusted according to the actual conditions of the goods.

SUMMERY OF THE UTILITY MODEL

To the defect among the prior art, the utility model discloses an aim at solves the inconvenient technical problem of operation among the prior art, provides a draw arm automobile-used packing box, and this packing box can open and shut the closed body automatically, can be according to the degree of opening and shutting of the goods size regulation closed door body, and it is more convenient to operate, can be according to the volume adjustment cavity size of goods or rubbish.

The purpose of the utility model is realized like this: a container for a draw arm vehicle comprises a container body, wherein a closed door body is hinged to the upper portion of the rear side of the container body, the closed door body can be attached to the rear side of the container body, linear drivers are respectively hinged to the two sides of the upper portion of the closed door body in the left and right directions, the linear drivers are connected with push-pull rods which obliquely extend downwards and can perform reciprocating linear movement, the outward side of the rear portion of the container body is hinged to the push-pull rods, and when the push-pull rods are completely in a retraction state, the closed door body is attached to the rear side of the container body; guide grooves are formed in two sides of the closed door body respectively, a lifting door capable of sliding along the guide grooves is connected in the closed door body, an adjusting plate is rotatably connected to the lower portion of the lifting door, and when the lifting door is located at the lowest position and faces the box body, the closed door body, the lifting door and the adjusting plate seal the accommodating cavity; when the lifting door is at the highest position and the adjusting plate faces backwards, a space for transporting goods to the accommodating cavity is reserved between the lifting door and the closed door body; the front side fixedly connected with mounted frame of box body, the front side fixedly connected with of mounted frame draws the ear, and the rear side of mounted frame articulates there is the push-and-pull driver, is equipped with the sliding door in the box body slidable, the sliding door sets up and in the place ahead of the closed door body relatively the closed door body, and when the closed door body laminating was at the box body rear side, formed the chamber that holds that is used for placing the goods between box body, sliding door and the closed door body.

The utility model is connected with a draw-arm vehicle, a hook on the draw-arm vehicle can hook a box body through a pull lug, before the draw-arm vehicle pulls the box body, the hook hooks the pull lug, the draw-arm vehicle pulls the box body towards the draw-arm vehicle until the draw-arm vehicle pulls the box body onto the draw-arm vehicle, at the moment, a closed door body is butted at the rear side of a frame of the draw-arm vehicle, if the goods needing to be placed on the box body are light and small in quantity, a lifting door is lifted up, an adjusting plate rotates backwards, the goods are placed into the box body through a space, the position of a sliding door is adjusted, the sliding door slides towards the closed door body, the size of a containing cavity can probably contain the goods to be loaded, the sliding of the sliding door is stopped, the goods are placed in the containing cavity through the space, after the goods are placed, the lifting door is lowered, the adjusting plate rotates towards the box body, the box body is in a closed state; if the weight of the goods is large or the quantity of the goods is large, the linear driver is controlled to act, the push-pull rod continuously extends upwards, and when the closed door body is unfolded upwards to a position where the garbage or the goods can be conveniently placed in the box body, the linear driver stops acting; reversely adjusting the position of the sliding door, sliding the sliding door towards the direction of the closed door body to enable the containing cavity to contain goods to be placed, stopping sliding the sliding door, placing the goods into the containing cavity, after the goods are placed, reversely actuating the linear driver, continuously retracting the push-pull rod until the closed body abuts against the box body, and stopping actuating the linear driver; the utility model can control the opening and closing of the sliding door, the adjusting plate or the closed door body according to actual needs, can adjust the size of the accommodating cavity according to the actual quantity and size of goods, prevent the goods from violently colliding with the inner wall of the box body and avoid the goods from being damaged; the utility model discloses can use with the cooperation of single arm-drag car.

In order to realize the up-and-down sliding of the lifting door, two sides of the closed door body in the left-and-right direction are connected with lifting drivers, the lifting drivers are connected with lifting rods which extend upwards and can do reciprocating linear movement along the direction of the guide grooves, and the lifting rods are fixedly connected with the upper part of the lifting door; the bottom of overhead door is the back shaft, the regulating plate upside is connected with at least one link, the link rotationally connects on the back shaft, leaves the clearance that supplies regulating door pivoted between the bottom side of regulating plate and back shaft.

In order to realize the angle adjustment of the adjusting plate, the upper part of the lifting door is connected with an angle adjusting driver, the angle adjusting driver is connected with an angle adjusting rod which extends downwards and can do reciprocating linear motion, and the end part of the angle adjusting rod extending downwards is hinged with the upper part of the connecting frame.

In order to realize the height adjustment of the idler wheel, the rear part of the closed door body is connected with a connecting shaft with adjustable height, and the idler wheel is rotatably connected onto the connecting shaft.

In order to further realize the height adjustment of the roller, one side of the closed door body in the left and right direction is provided with a height adjusting mechanism for adjusting the height of the roller, the height adjusting mechanism comprises an adjusting cylinder, the adjusting cylinder is provided with an adjusting rod which extends backwards and can be used as a reciprocating linear moving end, one end of the adjusting rod extending outwards is hinged with a connecting rod, one end of the connecting rod is hinged with the closed door body, and the other end of the connecting rod is fixedly connected with a connecting shaft; the other side of the closed door body in the left-right direction is hinged with one end of a supporting rod, and the other end of the supporting rod is rotatably connected to a connecting shaft.

In order to further improve the reliability of the roller during lifting, the height adjusting mechanism further comprises a supporting sleeve and a fixed plate fixedly connected to the outer side of the closed door body, the supporting sleeve is arranged in the direction of the connecting rod towards the closed door body, the supporting sleeve is rotatably connected to the connecting shaft, a hinged plate is arranged on the outer side of the supporting sleeve, a supporting rod is hinged to the fixed plate, and one end, where the fixed plate is located, of the supporting rod is hinged to the hinged plate.

In order to further realize the adjustment of the size of the accommodating cavity, sliding grooves are formed in the inner walls of two sides of the box body in the left-right direction, a sliding frame is arranged in the box body, the sliding door is fixedly connected to the upper side of the sliding frame, sliding blocks are fixedly connected to two sides of the sliding frame, the sliding blocks can slide along the sliding grooves, a push-pull driver is hinged to the sliding frame in front of the sliding door, a telescopic rod which is obliquely upwards and forwards and can perform reciprocating linear movement is connected to the push-pull driver, and the end part, extending outwards, of the telescopic rod is hinged to the rear side of the; in this design, when the chamber volume is held in need reducing, the action of control push-and-pull driver, the telescopic link upwards stretches out, and the carriage slides towards the closed door body place direction, holds the chamber and diminishes, when the chamber volume is held in needs increase, push-and-pull driver reverse motion, the telescopic link withdrawal, the carriage slides towards the mounted frame place direction, holds the chamber grow to the realization holds the adjustment of chamber size.

Conflict the impact force at the box body when further reducing the closure door body and falling, the both sides of the closure door body on left and right sides side fixedly connected with buffer board respectively, the buffer board can laminate in the box body rear side, and the buffer board setting is in the below of the articulated department of linear actuator and box body.

Drawings

Fig. 1 is a side view of the present invention.

Fig. 2 is a perspective view of the sliding door of the present invention after being lifted.

Fig. 3 is a partially enlarged view of a portion a in fig. 2.

Fig. 4 is a first three-dimensional structure view of the sliding door of the present invention after being lowered.

Fig. 5 is a second three-dimensional structure view of the middle sliding door of the present invention after being lowered.

Fig. 6 is a partially enlarged view of fig. 2 at B.

Fig. 7 is a partial enlarged view at C in fig. 5.

Fig. 8 is a perspective view of the present invention.

Fig. 9 is a partial enlarged view of fig. 8 at D.

Fig. 10 is a schematic view of the top cross-sectional structure inside the middle box body of the present invention.

Fig. 11 is a schematic view of the main cross-sectional structure inside the middle box body of the present invention.

The lifting device comprises a box body 1, rollers 2, a lifting driver 3, a lifting door 4, a lifting rod 5, a pull lug 6, a height adjusting mechanism 7, an adjusting cylinder 701, a hinged plate 702, a connecting rod 703, a fixing plate 704, an adjusting rod 705, a supporting rod 706, a supporting sleeve 707, a connecting shaft 8, an adjusting plate 9, a connecting frame 10, an angle adjusting rod 11, an angle adjusting driver 12, a guide groove 13, a linear driver 14, a push-pull rod 15, a receiving cavity 16, a closed door body 17, a buffer plate 18, a supporting shaft 19, a limiting plate 20, a sliding block 21, a telescopic rod 22, a push-pull driver 23, a sliding frame 24, a sliding door 25, a suspension frame 26, a sliding block 27, a sliding groove 28, a sliding assembly 29, a 2901 rolling groove.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

As shown in fig. 1 to 11, the cargo box for the draw arm vehicle comprises a box body 1, wherein a closed door body 17 is hinged to the upper portion of the rear side of the box body 1, the closed door body 17 can be attached to the rear side of the box body 1, linear drivers 14 are respectively hinged to the two sides of the upper portion of the closed door body 17 in the left-right direction, the linear drivers 14 are connected with push-pull rods 15 which extend obliquely downwards and can perform reciprocating linear movement, the outward side of the rear portion of the box body 1 is hinged to the push-pull rods 15, and when the push-pull rods 15 are completely in a retraction state, the closed door body 17 is attached to the rear side of the box body; the two sides of the closed door body 17 are respectively provided with a guide groove 13, the closed door body 17 is internally connected with a lifting door 4 which can slide along the guide grooves 13, the lower part of the lifting door 4 is rotatably connected with an adjusting plate 9, and when the lifting door 4 is at the lowest position and the adjusting plate 9 faces the box body 1, the closed door body 17, the lifting door 4 and the adjusting plate 9 close the accommodating cavity 16; when the lifting door 4 is at the highest position and the adjusting plate 9 faces backwards, a space for transporting goods into the accommodating cavity 16 is reserved between the lifting door 4 and the closed door body 17; the front side of the box body 1 is fixedly connected with a suspension bracket 26, the front side of the suspension bracket 26 is fixedly connected with a pull lug 6, the rear side of the suspension bracket 26 is hinged with a push-pull driver 23, a sliding door 25 is arranged in the box body 1 in a sliding manner, the sliding door 25 is arranged opposite to the closed door body 17 and is arranged in front of the closed door body 17, and when the closed door body 17 is attached to the rear side of the box body 1, a containing cavity 16 for placing goods is formed among the box body 1, the sliding door 25 and the closed door body 17; the structure for realizing the front-back sliding of the sliding door 25 is specifically that, in the left-right direction, sliding grooves 28 are formed in the inner walls of two sides of the box body 1, a sliding frame 24 is arranged in the box body 1, the sliding door 25 is fixedly connected to the upper side of the sliding frame 24, sliding blocks 2721 are fixedly connected to two sides of the sliding frame 24, the sliding blocks 2721 can slide along the sliding grooves 28, a push-pull driver 23 is hinged to the sliding frame 24 in front of the sliding door 25, a telescopic rod 2211 which is obliquely upwards and forwards and can perform reciprocating linear movement is connected to the push-pull driver 23, and the outwards extending end part of the telescopic rod 2211 is hinged; the two sides of the closed door body 17 in the left-right direction are respectively fixedly connected with a buffer plate 18, the buffer plates 18 can be attached to the rear side of the box body 1, and the buffer plates 18 are arranged below the hinged part of the linear driver 14 and the box body 1; in addition, a plurality of sets of sliding assemblies 29 (as shown in fig. 10 and 11) are fixedly arranged on the upper side of the base of the box body 1, each sliding assembly 29 is composed of two sliding rails 2902 (as shown by reference numeral 29 in fig. 10) which are arranged at intervals in parallel in the left-right direction, the interval between every two adjacent sets of sliding assemblies 29 just ensures that two garbage cans which are adjacently arranged in the left-right direction do not interfere with each other, a rolling groove 2901 is formed in each sliding rail 2902, two rollers 2 at the bottoms of the garbage cans can respectively roll along the two rolling grooves 2901 of the corresponding set of sliding assemblies 29, and the lower side of each sliding frame 24 is flush with the upper side of the corresponding sliding rail 2902.

In order to realize the up-and-down sliding of the lifting door 4, the two sides of the closed door body 17 in the left-and-right direction are connected with lifting drivers 3, the lifting drivers 3 are connected with lifting rods 5 which extend upwards and can do reciprocating linear movement along the direction of the sliding groove 28, and the lifting rods 5 are fixedly connected with the upper part of the lifting door 4; the bottom of the lifting door 4 is a support shaft 19, two sides of the lifting door 4 are fixedly connected with limiting plates 20, the limiting plates 20 are attached to the inner side of the closed door body to slide, the upper side of the adjusting plate 9 is connected with two connecting frames 10, the two connecting frames 10 are symmetrically arranged about the center of the adjusting plate 9 in the length direction, the length direction refers to the left and right direction taking a front view as a reference, the connecting frames 10 are rotatably connected to the support shaft 19, and a gap for the rotation of the adjusting door is reserved between the adjusting plate 9 and the bottom side of the support shaft 19; the upper part of the sliding door 25 is connected with an angle adjusting driver 12, the angle adjusting driver 12 is connected with an angle adjusting rod 705 which extends downwards and can do reciprocating linear motion, and the end part of the angle adjusting rod 705 extending downwards is hinged with the upper part of the connecting frame 10.

In order to realize the height adjustment of the roller 2, the rear part of the closed door body 17 is connected with a connecting shaft 8 with adjustable height, and the roller 2 is rotatably connected on the connecting shaft 8; a height adjusting mechanism 7 for adjusting the height of the roller 2 is arranged on one side of the closed door body 17 in the left-right direction, the height adjusting mechanism 7 comprises an adjusting cylinder 701, an adjusting rod 705 which extends backwards and can be used as a reciprocating linear moving end is arranged on the adjusting cylinder 701, one end of the adjusting rod 705 extending outwards is hinged with a connecting rod 703, one end of the connecting rod 703 is hinged with the closed door body 17, and the other end of the connecting rod 703 is fixedly connected with a connecting shaft 8; the connecting shaft 8 is rotatably connected with a supporting sleeve 707, the outer side of the closed door body 17 is fixedly connected with a fixed plate 704, the supporting sleeve 707 is arranged on the connecting rod 703 in the direction towards the closed door body 17, the outer side of the supporting sleeve 707 is provided with a hinged plate 702, the fixed plate 704 is hinged with a supporting rod 706, and one end of the supporting rod 706, which is far away from the fixed plate 704, is hinged with the hinged plate 702.

The linear actuator 14, the lifting actuator 3, the angle adjusting actuator 12, the push-pull actuator 23 and the adjusting cylinder 701 in the present embodiment are preferably hydraulic cylinders; before goods are not placed in the box body 1, the sliding door 25 is at the lowest position, and the adjusting plate 9 is downward and faces the box body 1; the utility model discloses be connected with the single arm-drag car, the couple on the single arm-drag car can hook box body 1 through draw ear 6, the single arm-drag car is before holding box body 1, gyro wheel 2 contacts with ground, the couple hooks draw ear 6, the single arm-drag car pulls box body 1 to the direction that the single arm-drag car is located, gyro wheel 2 rolls on the ground, until the single arm-drag car pulls box body 1 to the single arm-drag car, at this moment, closed door 17 contradicts in the frame rear side of single arm-drag car, adjust the cylinder 701 action, make adjusting rod 705 constantly stretch out backward, adjusting rod 705 promotes connecting rod 703 and upwards rotates, connecting rod 703 drives connecting axle 8 and upwards moves, bracing piece 706 also upwards swings, support cover 707 rotates on connecting axle 8, connecting axle 8 drives gyro wheel 2 and upwards moves, gyro wheel 2 rises, make gyro wheel 2 keep away from ground, adjust cylinder 701 stop the action; if the goods to be placed on the box body 1 are light and the quantity is not large, the lifting driver 3 is controlled to act, the lifting rod 5 extends upwards, when the sliding door 25 is at the highest position, the lifting driver 3 stops acting, meanwhile, the adjusting driver 12 is controlled to act, the telescopic rod 2211 retracts upwards to the highest position, the adjusting plate 9 rotates backwards and upwards to the highest position, the push-pull driver 23 is controlled to act, the telescopic rod 2211 extends upwards, the sliding frame 24 slides towards the direction of the closed door body 17, the accommodating cavity 16 becomes small, after the adjustment is finished, controlling the push-pull driver 23 to stop acting, after the placement of the goods is completed, reversely acting the lifting driver 3 and the adjusting driver 12, lowering the sliding door 25 to the lowest position, reversely rotating the adjusting plate 9 to face the box body 1, and sealing the box body 1 by the sealing door body 17, the sliding door 25 and the adjusting plate 9; if the weight of the goods is large or the quantity of the goods is large, the linear driver 14 is controlled to act, the push-pull rod 15 continuously extends upwards, and when the closed door body 17 is unfolded upwards to a position where the garbage or the goods can be conveniently placed in the box body 1, the linear driver 14 stops acting; controlling the push-pull driver 23 to reversely act, retracting the telescopic rod 2211, sliding the sliding frame 24 towards the direction of the suspension bracket 26, enlarging the accommodating cavity 16, finishing adjustment, controlling the push-pull driver 23 to stop acting, controlling the linear driver 14 to reversely act, and continuously retracting the push-pull rod 15; the closed door body 17 in the utility model can be automatically lifted, and the opening and closing of the sliding door 25, the adjusting plate 9 or the closed door body 17 can be controlled according to the weight and the quantity of goods, after the box body 1 is pulled to the arm-pulling vehicle, the roller 2 is lifted up, the collision between the roller 2 and the ground obstacle is avoided, and the working reliability is improved; the volume of the accommodating cavity 16 can be adjusted according to the quantity of the goods, so that the accommodating cavity 16 is filled with the goods as much as possible, the goods are prevented from violently colliding with the inner wall of the box body 1, and the goods are prevented from being damaged; can be used in cooperation with a pull arm vehicle.

The present invention is not limited to the above embodiments, and based on the technical solutions disclosed in the present invention, those skilled in the art can make some replacements and transformations for some technical features without creative labor according to the disclosed technical contents, and these replacements and transformations are all within the protection scope of the present invention.

Claims

1. The utility model provides a packing box for draw arm car, includes the box body, its characterized in that: the upper part of the rear side of the box body is hinged with a closed door body, the closed door body can be attached to the rear side of the box body, two sides of the upper part of the closed door body in the left and right directions are respectively hinged with a linear driver, the linear driver is connected with a push-pull rod which obliquely extends downwards and can do reciprocating linear movement, one outward side of the rear part of the box body is hinged with the push-pull rod, and when the push-pull rod is completely in a retraction state, the closed door body is attached to the rear side of the box body; guide grooves are formed in two sides of the closed door body respectively, a lifting door capable of sliding along the guide grooves is connected in the closed door body, an adjusting plate is rotatably connected to the lower portion of the lifting door, and when the lifting door is located at the lowest position and faces the box body, the closed door body, the lifting door and the adjusting plate seal the accommodating cavity; when the lifting door is at the highest position and the adjusting plate faces backwards, a space for transporting goods to the accommodating cavity is reserved between the lifting door and the closed door body; the front side fixedly connected with mounted frame of box body, the front side fixedly connected with of mounted frame draws the ear, and the rear side of mounted frame articulates there is the push-and-pull driver, is equipped with the sliding door in the box body slidable, the sliding door sets up and in the place ahead of the closed door body relatively the closed door body, and when the closed door body laminating was at the box body rear side, formed the chamber that holds that is used for placing the goods between box body, sliding door and the closed door body.

2. A container for a draw arm vehicle as defined in claim 1, wherein: the two sides of the closed door body in the left-right direction are connected with lifting drivers, the lifting drivers are connected with lifting rods which extend upwards and can do reciprocating linear movement along the direction of the guide grooves, and the lifting rods are fixedly connected with the upper part of the lifting door; the bottom of overhead door is the back shaft, the regulating plate upside is connected with at least one link, the link rotationally connects on the back shaft, leaves the clearance that supplies regulating door pivoted between the bottom side of regulating plate and back shaft.

3. A container for a draw arm vehicle as defined in claim 2, wherein: the upper portion of the lifting door is connected with an angle adjusting driver, an angle adjusting rod which extends downwards and can do reciprocating linear motion is connected to the angle adjusting driver, and the end portion, extending downwards, of the angle adjusting rod is hinged to the upper portion of the connecting frame.

4. A container for a draw arm vehicle as defined in claim 1, wherein: the rear part of the closed door body is connected with a connecting shaft with adjustable height, and the connecting shaft is rotatably connected with a roller.

5. A container for a draw arm vehicle as defined in claim 4, wherein: the utility model discloses a high-efficient door body, including the closing door body, the closing door body is equipped with the height control mechanism who is used for adjusting the gyro wheel height respectively in the both sides of left and right sides orientation, height control mechanism is including adjusting the jar, be equipped with the regulation pole that stretches out backward and can do reciprocal linear motion end on the regulation jar, the one end that the regulation pole stretches out outwards articulates there is the connecting rod, the one end and the closing door body of connecting rod are articulated, and the other end and the connecting shaft of connecting.

6. A container for a draw arm vehicle as defined in claim 5, wherein: the height adjusting mechanism further comprises a supporting sleeve and a fixed plate fixedly connected to the outer side of the closed door body, the supporting sleeve is arranged in the direction of the connecting rod towards the closed door body, the supporting sleeve is rotatably connected to the connecting shaft, a hinged plate is arranged on the outer side of the supporting sleeve, a supporting rod is hinged to the fixed plate, and one end, away from the fixed plate, of the supporting rod is hinged to the hinged plate.

7. A container for a draw arm vehicle as defined in claim 1, wherein: in the left and right directions, the inner walls of two sides of the box body are provided with sliding grooves, the box body is internally provided with a sliding frame, the sliding door is fixedly connected to the upper side of the sliding frame, sliding blocks are fixedly connected to two sides of the sliding frame and can slide along the sliding grooves, the sliding frame in front of the sliding door is hinged to a push-pull driver, the push-pull driver is connected with a telescopic rod which inclines upwards and stretches forwards and can move in a reciprocating linear mode, and the end portion, stretching outwards, of the telescopic rod is hinged to the rear side of the suspension frame.

8. A container for a draw arm vehicle as claimed in any one of claims 1 to 7 wherein: the utility model discloses a refrigerator door body, including box body, linear driver, buffer board, linear driver and box body, the both sides of the closure door body on the left and right sides are fixedly connected with buffer board respectively, the buffer board can laminate in box body rear side, and the buffer board sets up the below at the articulated department of linear driver and box body.