CN111576316B

CN111576316B - Draw beam suitable for trailer

Info

Publication number: CN111576316B
Application number: CN202010491445.XA
Authority: CN
Inventors: 施伟红
Original assignee: Kong Xiafei
Current assignee: Kong Xiafei
Priority date: 2020-06-02
Filing date: 2020-06-02
Publication date: 2021-09-17
Anticipated expiration: 2040-06-02
Also published as: CN111576316A

Abstract

The invention relates to a draft sill suitable for a trailer, which relates to the technical field of trailer traction and comprises a fixed cross beam frame, a buffer cross beam frame, an expansion adjusting mechanism, a storable cross beam assembly, a first buffer seat, a second buffer seat and a fixed hook. Buffering crossbeam frame swing joint is on fixed crossbeam frame, and two expansion adjustment mechanism symmetries set up at the both ends of buffering crossbeam frame, can accomodate crossbeam subassembly swing joint at the middle part of buffering crossbeam frame, and the both ends that can accomodate the crossbeam subassembly are connected with two expansion adjustment mechanism cooperations respectively, and first cushion receptacle swing joint is in can accomodating the crossbeam subassembly, and second cushion receptacle swing joint is on first cushion receptacle, and fixed couple sets up the middle part at the second cushion receptacle.

Description

Draw beam suitable for trailer

Technical Field

The invention relates to the technical field of trailer traction, in particular to a traction beam suitable for a trailer.

Background

The utility model discloses a connecting beam device of a snow sweeper tractor and a trailer with the patent number of CN201220401808.7, which comprises a structural beam (1) and 2 interface flanges (2), wherein the structural beam (1) is a rectangular hollow steel section and is respectively connected with the snow sweeper tractor and the trailer through the interface flanges (2); the connecting beam device leaves enough operating space for the roller brush and the air duct which are arranged below the front part of the trailer of the snow remover. The utility model has large stress and compact volume; the structure is simple, and the cost is low; the rigidity and the strength are high, and the safety and the reliability are high; the size of the product can be conveniently and quickly changed according to the actual situation. But the device does not have a buffering function.

Disclosure of Invention

The invention aims to provide a traction beam suitable for a trailer, which has the beneficial effect that the traction beam has a buffering function when being used as a cross beam or in traction.

The purpose of the invention is realized by the following technical scheme:

the utility model provides a draw beam suitable for trailer, includes fixed crossbeam frame, buffering crossbeam frame, expandes adjustment mechanism, can accomodate crossbeam subassembly, first cushion receptacle, second cushion receptacle and fixed couple, buffering crossbeam frame swing joint on fixed crossbeam frame, two expand adjustment mechanism symmetries and set up at the both ends of buffering crossbeam frame, can accomodate crossbeam subassembly swing joint at the middle part of buffering crossbeam frame, can accomodate the both ends of crossbeam subassembly and expand adjustment mechanism cooperation with two respectively and be connected, first cushion receptacle swing joint is in can accomodating the crossbeam subassembly, second cushion receptacle swing joint is on first cushion receptacle, fixed couple sets up the middle part at the second cushion receptacle.

As further optimization of the technical scheme, the fixed cross beam comprises an intermediate plate, a template plate, a trapezoidal sliding rail, a spring seat, a spring sleeve rod and a first buffer spring; the two ends of the middle plate are respectively fixedly connected with a tool plate, the two ends of the two tool plates are respectively fixedly connected with a trapezoidal sliding rail, the outer ends of the two tool plates are respectively fixedly connected with a spring seat, the inner ends of the four spring seats are respectively fixedly connected with a spring loop bar, and the four spring loop bars are respectively sleeved with a first buffer spring; the buffering transverse beam frame is connected with the four spring sleeve rods in a matched mode.

As further optimization of the technical scheme, the draft sill suitable for the trailer comprises an underframe, a hinged seat, a side U-shaped frame, a side through groove, a rotating rod, a hinged arm and a sliding seat; the front end of the underframe is fixedly connected with two hinged seats, the storable cross beam assembly is rotatably connected onto the two hinged seats, two ends of the underframe are respectively and fixedly connected with a side U-shaped frame, the outer ends of the two side U-shaped frames are respectively provided with a side through groove, two ends of the two side U-shaped frames are respectively and fixedly connected with a rotating rod, four rotating rods are respectively and rotatably connected with a hinged arm, four hinged arms are respectively and rotatably connected with a sliding seat, four sliding seats are respectively and slidably connected onto four trapezoidal sliding rails, and four sliding seats are respectively and slidably connected onto four spring loop bars; the first buffer spring is fixedly connected to the spring seat and the sliding seat; the two unfolding adjusting mechanisms are respectively arranged on the two side U-shaped frames.

As further optimization of the technical scheme, the invention relates to a traction beam suitable for a trailer, wherein the unfolding adjusting mechanism comprises a motor, a lead screw, a side sliding block, a linkage block and a linkage rod; the motor is fixedly connected to the side U-shaped frame through the motor frame, an output shaft of the motor is connected with the lead screw through the coupler, the side sliding block is connected to the lead screw through thread fit, the inner end of the side sliding block is fixedly connected with the linkage block, the inner end of the linkage block is rotatably connected with the linkage rod, and the linkage rod is connected with the storable cross beam assembly in a fit manner; the side sliding blocks are connected in the side through grooves in a sliding fit mode, and the linkage blocks are connected in the side U-shaped frames in a sliding fit mode.

As further optimization of the technical scheme, the draft sill applicable to the trailer comprises a retractable beam assembly, a retractable beam assembly and a guide rail, wherein the retractable beam assembly comprises a U-shaped frame, a long shaft, a baffle, a rotating rod, an inner sliding groove, a sliding rod, a T-shaped block and a second buffer spring; the U-shaped frame is fixedly connected to the long shaft, two ends of the long shaft are respectively and rotatably connected to the two hinge seats, the lower end of the U-shaped frame is fixedly connected with the baffle, and the outer ends of the two ends of the U-shaped frame are respectively and fixedly connected with a rotating rod; the lower end of the linkage rod is rotatably connected to the rotating rod, inner ends of two ends of the U-shaped frame are respectively provided with an inner sliding chute, inner ends of the two sliding rods are symmetrically and fixedly connected into the U-shaped frame, outer ends of the two sliding rods are respectively and fixedly connected with a T-shaped block, the two T-shaped blocks are symmetrically and fixedly arranged at two ends of the U-shaped frame, and two ends of the two T-shaped blocks are respectively sleeved with a second buffer spring; the first buffer seat is connected with the two sliding rods in a matched mode.

As the further optimization of the technical scheme, the invention relates to a traction beam suitable for a trailer, wherein a first buffer seat comprises a cross frame plate, a rotating seat, a long rod and a third buffer spring; two ends of the transverse frame plate are respectively connected in the two rotating rods in a sliding fit manner; the movable screw seat is positioned between the fixed screw seat and the U-shaped frame; two ends of the transverse frame plate are respectively connected to the middle parts of the two sliding rods in a sliding fit manner; two ends of the second buffer spring are respectively and fixedly connected with the U-shaped frame and the transverse frame plate; the middle part of the transverse frame plate is fixedly connected with two rotating seats, two ends of the transverse frame plate are respectively and fixedly connected with a long rod, and a third buffer spring is sleeved on each of the two long rods; the second buffer seat is rotatably connected to the two rotating seats.

As further optimization of the technical scheme, the second buffer seat comprises a T-shaped seat, a rectangular through groove and a locking screw; the middle part of T type seat is rotated and is connected on two rotation seats, and the both ends of T type seat are equipped with a rectangle respectively and lead to the groove, and two stock sliding fit connection are led to the inslot at two rectangles respectively, and the both ends of T type seat are connected at a locking screw through the screw thread cooperation respectively, and two locking screws correspond with two stock respectively, the fixed couple of middle part fixed connection of T type seat.

According to the technical scheme, the draft sill suitable for the trailer further comprises two fixing screw seats and two inserting screws, wherein the two fixing screw seats are symmetrically and fixedly connected to two ends of the U-shaped frame, and the two inserting screws are respectively connected to the two fixing screw seats in a threaded fit mode.

According to the technical scheme, the two ends of the transverse frame plate are respectively and fixedly connected with the movable screw seats; the movable screw seat is positioned between the fixed screw seat and the U-shaped frame; the two inserting screws respectively correspond to the two movable screw seats.

The invention discloses a traction beam suitable for a trailer, which has the beneficial effects that:

the invention relates to a draft sill suitable for a trailer, which has multiple buffering functions, when the draft sill needs to be towed, two unfolding adjusting mechanisms are started to drive a storable crossbeam component to unfold so as to connect and fix the trailer with a fixed hook, when the draft sill is towed, a first-stage buffering function is realized between a second buffering seat and a first buffering seat, a second-stage buffering function is realized between the first buffering seat and the storable crossbeam component for towing, a third-stage buffering function is realized between a fixed crossbeam frame and a buffering crossbeam frame, when the draft sill is used as a crossbeam without towing, the second buffering seat and the first buffering seat can be locked, the first buffering seat and the storable crossbeam component are locked, the fixed hook is prevented from moving back and forth when not in use, the fixed hook can be retracted into the buffering crossbeam frame to be used as an anti-collision beam when not in use, and simultaneously the storable crossbeam component and the buffering crossbeam frame are combined into a vertical plane to be used as the anti-collision beam to have a buffering function, and the collision damage caused by collision is reduced.

Drawings

FIG. 1 is a first schematic view of a draft sill adapted for use in a trailer according to the present invention;

FIG. 2 is a second schematic structural view of a draft sill for a trailer according to the present invention;

FIG. 3 is a schematic structural view of the attachment cross-beam;

FIG. 4 is a first structural view of a bumper beam frame;

FIG. 5 is a second structural view of the bumper beam frame;

FIG. 6 is a schematic structural view of the deployment adjustment mechanism and stowable cross-beam assembly;

fig. 7 is a schematic structural view of the first buffer seat, the second buffer seat and the fixing hook.

In the figure: a fixed cross beam frame 1; an intermediate plate 1-1; 1-2 parts of a tool plate; 1-3 of a trapezoidal sliding rail; spring seats 1-4; 1-5 parts of a spring sleeve rod; a first buffer spring 1-6; a buffer beam frame 2; a chassis 2-1; a hinged seat 2-2; 2-3 of a side U-shaped frame; 2-4 of side through grooves; 2-5 of a rotating rod; articulated arms 2-6; 2-7 of a sliding seat; a deployment adjustment mechanism 3; a motor 3-1; 3-2 parts of a lead screw; 3-3 of a side sliding block; 3-4 of a linkage block; 3-5 of a linkage rod; a stowable cross beam assembly 4; 4-1 of a U-shaped frame; long axis 4-2; 4-3 of a baffle plate; 4-4 of a rotating rod; 4-5 of an inner chute; 4-6 of a fixing screw seat; 4-7 of inserting screws; 4-8 parts of a sliding rod; 4-9 parts of T-shaped block; 4-10 parts of a second buffer spring; a first buffer base 5; 5-1 of a transverse frame plate; a movable screw seat 5-2; 5-3 of a rotating seat; 5-4 of long rod; a third buffer spring 5-5; a second cushion seat 6; 6-1 of a T-shaped seat; a rectangular through groove 6-2; 6-3 of a locking screw; a fixed hook 7.

Detailed Description

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Moreover, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the electrical components that appear in this application all external intercommunication power and control switch when using.

The invention is described in further detail below with reference to figures 1-7 and the detailed description.

The first embodiment is as follows:

the present embodiment will be described with reference to fig. 1 to 7, in which a draft sill adapted to a trailer includes a fixed beam frame 1, a buffer beam frame 2, expansion adjusting mechanisms 3, a storable beam assembly 4, a first buffer base 5, a second buffer base 6 and a fixed hook 7, wherein the buffer beam frame 2 is movably connected to the fixed beam frame 1, the two expansion adjusting mechanisms 3 are symmetrically disposed at both ends of the buffer beam frame 2, the storable beam assembly 4 is movably connected to the middle of the buffer beam frame 2, both ends of the storable beam assembly 4 are respectively connected to the two expansion adjusting mechanisms 3 in a matching manner, the first buffer base 5 is movably connected to the storable beam assembly 4, the second buffer base 6 is movably connected to the first buffer base 5, and the fixed hook 7 is disposed at the middle of the second buffer base 6. When the device is used, a screw is inserted into the fixed cross beam frame 1 to fix the device at a designated position of a vehicle body, when the device is normally used as a cross beam, the storable cross beam assembly 4 is stored in the buffer cross beam frame 2 to form a plane with the buffer cross beam frame 2, when the device needs to be pulled, the two expansion adjusting mechanisms 3 are started to drive the storable cross beam assembly 4 to expand, the storable cross beam assembly 4 is connected and fixed with the fixed hook 7 by a trailer, when the device is pulled, a primary buffer function is realized between the second buffer seat 6 and the first buffer seat 5, a secondary buffer function is realized between the first buffer seat 5 and the storable cross beam assembly 4 for pulling, a tertiary buffer function is realized between the fixed cross beam frame 1 and the buffer cross beam frame 2, when the device is not pulled to be used as a cross beam, the second buffer seat 6 and the first buffer seat 5 can be locked, the first buffer seat 5 and the storable cross beam assembly 4 are locked, and the fixed hook 7 is prevented from moving back and forth when the device is not used, fixed couple 7 can be through two expansion adjustment mechanism 3 when not using can accomodate crossbeam subassembly 4 and take in buffering crossbeam frame 2 in as crashproof roof beam and use, can accomodate crossbeam subassembly 4 simultaneously and merge into a vertical plane with buffering crossbeam frame 2 and when using as crashproof roof beam, possesses the function of buffering between fixed crossbeam frame 1 and the buffering crossbeam frame 2, alleviates the collision damage that the striking produced.

The second embodiment is as follows:

the present embodiment is described below with reference to fig. 1 to 7, and the fixed cross beam frame 1 includes an intermediate plate 1-1, a tooling plate 1-2, a trapezoidal sliding rail 1-3, a spring seat 1-4, a spring loop bar 1-5, and a first buffer spring 1-6; the two ends of the middle plate 1-1 are respectively fixedly connected with a tooling plate 1-2, the two ends of the two tooling plates 1-2 are respectively fixedly connected with a trapezoidal sliding rail 1-3, the outer ends of the two tooling plates 1-2 are respectively fixedly connected with a spring seat 1-4, the inner ends of the four spring seats 1-4 are respectively fixedly connected with a spring loop bar 1-5, and a first buffer spring 1-6 is respectively sleeved on each of the four spring loop bars 1-5; the buffering transverse beam frame 2 is connected with four spring sleeve rods 1-5 in a matched mode. The device is fixed at the designated position of the vehicle body by inserting screws into the middle plate 1-1 and the two tool-shaped plates 1-2, when the device is used and can contain the beam assembly 4 and the buffering beam frame 2 to collide or be subjected to external force, the four first buffering springs 1-6 can deform to play a buffering role.

The third concrete implementation mode:

the embodiment is described below with reference to fig. 1-7, and the bumper beam frame 2 comprises an underframe 2-1, a hinge seat 2-2, a side U-shaped frame 2-3, a side through groove 2-4, a rotating rod 2-5, a hinge arm 2-6 and a sliding seat 2-7; the front end of an underframe 2-1 is fixedly connected with two hinge seats 2-2, a storable crossbeam component 4 is rotatably connected on the two hinge seats 2-2, two ends of the underframe 2-1 are respectively fixedly connected with a side U-shaped frame 2-3, the outer ends of the two side U-shaped frames 2-3 are respectively provided with a side through groove 2-4, two ends of the two side U-shaped frames 2-3 are respectively fixedly connected with a rotating rod 2-5, four rotating rods 2-5 are respectively rotatably connected with an articulated arm 2-6, four articulated arms 2-6 are respectively rotatably connected with a sliding seat 2-7, four sliding seats 2-7 are respectively connected on four trapezoidal sliding rails 1-3 in a sliding fit manner, and four sliding seats 2-7 are respectively connected on four spring loop bars 1-5 in a sliding fit manner; the first buffer springs 1-6 are fixedly connected to the spring seats 1-4 and the sliding seats 2-7; the two unfolding adjusting mechanisms 3 are respectively arranged on the two side U-shaped frames 2-3. When the impact force or traction force is too large during use, the two side U-shaped frames 2-3 move backwards, the two side U-shaped frames 2-3 drive the four sliding seats 2-7 to slide on the four spring loop bars 1-5 through the four hinge arms 2-6, the four sliding seats 2-7 compress the four first buffer springs 1-6 to compress the four first buffer springs 1-6, and the compressed first buffer springs 1-6 absorb and buffer the impact force at a third level.

The fourth concrete implementation mode:

the embodiment is described below with reference to fig. 1 to 7, and the unfolding adjusting mechanism 3 includes a motor 3-1, a screw rod 3-2, a side sliding block 3-3, a linkage block 3-4 and a linkage rod 3-5; the motor 3-1 is fixedly connected to the side U-shaped frame 2-3 through a motor frame, an output shaft of the motor 3-1 is connected with the lead screw 3-2 through a coupler, the side sliding block 3-3 is connected to the lead screw 3-2 through thread fit, the inner end of the side sliding block 3-3 is fixedly connected with the linkage block 3-4, the inner end of the linkage block 3-4 is rotatably connected with the linkage rod 3-5, and the linkage rod 3-5 is connected with the storable cross beam assembly 4 in a fit manner; the side sliding blocks 3-3 are connected in the side through grooves 2-4 in a sliding fit mode, and the linkage blocks 3-4 are connected in the side U-shaped frames 2-3 in a sliding fit mode. When the foldable transverse beam assembly is used, the motor 3-1 is started to drive the screw rod 3-2 to rotate, the screw rod 3-2 drives the side sliding block 3-3 and the linkage block 3-4 to drive the linkage rod 3-5 to ascend or descend, and the linkage rod 3-5 drives the foldable transverse beam assembly 4 to unfold or store the foldable transverse beam assembly between the two side U-shaped frames 2-3.

The fifth concrete implementation mode:

referring to fig. 1-7, the retractable beam assembly 4 of the present embodiment includes a U-shaped frame 4-1, a long shaft 4-2, a baffle 4-3, a rotating rod 4-4, an inner sliding groove 4-5, a sliding rod 4-8, a T-shaped block 4-9, and a second buffer spring 4-10; the U-shaped frame 4-1 is fixedly connected to the long shaft 4-2, two ends of the long shaft 4-2 are respectively and rotatably connected to the two hinge seats 2-2, the lower end of the U-shaped frame 4-1 is fixedly connected with the baffle 4-3, and the outer ends of two ends of the U-shaped frame 4-1 are respectively and fixedly connected with the rotating rods 4-4; the lower end of the linkage rod 3-5 is rotatably connected to the rotating rod 4-4, the inner ends of two ends of the U-shaped frame 4-1 are respectively provided with an inner chute 4-5, the inner ends of two sliding rods 4-8 are symmetrically and fixedly connected into the U-shaped frame 4-1, the outer ends of the two sliding rods 4-8 are respectively and fixedly connected with a T-shaped block 4-9, the two T-shaped blocks 4-9 are symmetrically and fixedly arranged at two ends of the U-shaped frame 4-1, and two ends of the two T-shaped blocks 4-9 are respectively sleeved with a second buffer spring 4-10; the first buffer seat 5 is connected with the two sliding rods 4-8 in a matching way. When the connecting device is used, the linkage rod 3-5 drives the U-shaped frame 4-1 and the long shaft 4-2 to rotate on the two hinge seats 2-2 through the two rotating rods 4-4, so that the U-shaped frame 4-1 is accommodated between the two side U-shaped frames 2-3 or is unfolded towards the outer end, the U-shaped frame 4-1 drives the fixed hook 7 to be connected in a traction manner when being unfolded, when the U-shaped frame 4-1 is accommodated between the two side U-shaped frames 2-3, the baffle 4-3 and the two side U-shaped frames 2-3 are used as an anti-collision beam of a vehicle body in a plane, and at the moment, the four first buffer springs 1-6 play a role in buffering when being used as the anti-collision beam, and impact of the anti-collision beam on the vehicle body caused by collision is reduced.

The sixth specific implementation mode:

referring to fig. 1-7, the first buffer base 5 includes a cross frame plate 5-1, a rotating base 5-3, a long rod 5-4 and a third buffer spring 5-5; two ends of the transverse frame plate 5-1 are respectively connected in the two rotating rods 4-4 in a sliding fit manner; two ends of the transverse frame plate 5-1 are respectively connected to the middle parts of the two sliding rods 4-8 in a sliding fit manner; two ends of the second buffer spring 4-10 are respectively and fixedly connected with a U-shaped frame 4-1 and a transverse frame plate 5-1; the middle part of the transverse frame plate 5-1 is fixedly connected with two rotating seats 5-3, two ends of the transverse frame plate 5-1 are respectively fixedly connected with a long rod 5-4, and a third buffer spring 5-5 is respectively sleeved on the two long rods 5-4; the second buffer seat 6 is rotatably connected to the two rotating seats 5-3. When the fixing hook 7 is used, the fixing hook 7 is subjected to traction force to enable the cross frame plate 5-1 to move back and forth on the two sliding rods 4-8, so that the four second buffer springs 4-10 are stretched or compressed to play a secondary buffer role in traction.

The seventh embodiment:

the present embodiment is described below with reference to fig. 1 to 7, wherein the second buffer seat 6 includes a T-shaped seat 6-1, a rectangular through slot 6-2 and a locking screw 6-3; the middle part of the T-shaped seat 6-1 is rotatably connected to the two rotating seats 5-3, two ends of the T-shaped seat 6-1 are respectively provided with a rectangular through groove 6-2, the two long rods 5-4 are respectively connected in the two rectangular through grooves 6-2 in a sliding fit manner, two ends of the T-shaped seat 6-1 are respectively connected with a locking screw 6-3 in a threaded connection fit manner, the two locking screws 6-3 respectively correspond to the two long rods 5-4, and the middle part of the T-shaped seat 6-1 is fixedly connected with a fixed hook 7. When the T-shaped seat buffer device is used, the fixing hook 7 is provided with the fixing bolt, when the fixing hook 7 is connected with a trailer, when a vehicle turns, the T-shaped seat 6-1 can swing and slide on the two long rods 5-4, the two third buffer springs 5-5 are stretched or compressed, the swinging buffer and the shock absorption of the T-shaped seat 6-1 are achieved, and a primary buffer effect is achieved on traction.

The specific implementation mode is eight:

referring to fig. 1-7, the storable beam assembly 4 further includes two fixing screw seats 4-6 and two inserting screws 4-7, wherein the two fixing screw seats 4-6 are symmetrically and fixedly connected to two ends of the U-shaped frame 4-1, and the two inserting screws 4-7 are respectively connected to the two fixing screw seats 4-6 through screw threads in a matching manner.

Two ends of the transverse frame plate 5-1 are respectively fixedly connected with a movable screw seat 5-2; the movable screw seat 5-2 is positioned between the fixed screw seat 4-6 and the U-shaped frame 4-1; the two inserting screws 4-7 correspond to the two movable screw seats 5-2 respectively. The front end and the rear end of the transverse frame plate 5-1 are respectively provided with two second buffer springs 4-10, when the transverse frame plate 5-1 is not subjected to external force, the transverse frame plate 5-1 is positioned in the middle of the slide rod 4-8 under the action of the four second buffer springs 4-10 and corresponds to the inserting screw 4-7, so that the inserting screw 4-7 can be directly inserted into the movable screw seat 5-2 when the transverse frame plate 5-1 is not used, when the U-shaped frame 4-1 needs to be stored, the two inserting screws 4-7 can be screwed and inserted into the two movable screw seats 5-2, the transverse frame plate 5-1 is fixed, simultaneously the two locking screws 6-3 are screwed on the two long rods 5-4, the T-shaped seat 6-1 and the two long rods 5-4 are fixed, and at the moment, the transverse frame plate 5-1 and the T-shaped seat 6-1 cannot move, the transverse frame plate 5-1, the T-shaped seat 6-1 and the fixed hook 7 in the device are prevented from moving back and forth when the device is used as a cross beam, and the stability of the device is improved.

The invention relates to a working principle of a traction beam suitable for a trailer, which comprises the following steps: when the device is used, the device is fixed at the designated position of a vehicle body by inserting screws into the fixed cross beam frame 1, when the device is normally used as a cross beam, the storable cross beam assembly 4 is accommodated in the buffer cross beam frame 2 to form a plane with the buffer cross beam frame 2, when the device needs to be pulled, the two expansion adjusting mechanisms 3 are started to drive the storable cross beam assembly 4 to expand, a trailer is connected and fixed with the fixed hook 7, when the device is pulled, a first-level buffer function is realized between the second buffer seat 6 and the first buffer seat 5, a second-level buffer function is realized between the first buffer seat 5 and the storable cross beam assembly 4 for pulling, a third-level buffer function is realized between the fixed cross beam frame 1 and the buffer cross beam frame 2, when the device is not pulled to be used as a cross beam, the second buffer seat 6 and the first buffer seat 5 can be locked, the first buffer seat 5 and the storable cross beam assembly 4 are locked, and the fixed hook 7 is prevented from moving back and forth when the device is not used, fixed couple 7 can be through two expansion adjustment mechanism 3 when not using can accomodate crossbeam subassembly 4 and take in buffering crossbeam frame 2 in as crashproof roof beam and use, can accomodate crossbeam subassembly 4 simultaneously and merge into a vertical plane with buffering crossbeam frame 2 and when using as crashproof roof beam, possesses the function of buffering between fixed crossbeam frame 1 and the buffering crossbeam frame 2, alleviates the collision damage that the striking produced.

It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and that various changes, modifications, additions and substitutions which are within the spirit and scope of the present invention and which may be made by those skilled in the art are also within the scope of the present invention.

Claims

1. The utility model provides a draw beam suitable for trailer, includes fixed crossbeam frame (1), buffering crossbeam frame (2), expandes adjustment mechanism (3), can accomodate crossbeam subassembly (4), first cushion socket (5), second cushion socket (6) and fixed couple (7), its characterized in that: the buffer cross beam frame (2) is movably connected to the fixed cross beam frame (1), the two expansion adjusting mechanisms (3) are symmetrically arranged at two ends of the buffer cross beam frame (2), the storable cross beam assembly (4) is movably connected to the middle of the buffer cross beam frame (2), two ends of the storable cross beam assembly (4) are respectively in matched connection with the two expansion adjusting mechanisms (3), the first buffer seat (5) is movably connected into the storable cross beam assembly (4), the second buffer seat (6) is movably connected onto the first buffer seat (5), and the fixed hook (7) is arranged at the middle of the second buffer seat (6);

the fixed cross beam frame (1) comprises an intermediate plate (1-1), an I-shaped plate (1-2), a trapezoidal sliding rail (1-3), a spring seat (1-4), a spring loop bar (1-5) and a first buffer spring (1-6); the two ends of the middle plate (1-1) are respectively fixedly connected with a tool plate (1-2), the two ends of the two tool plates (1-2) are respectively fixedly connected with a trapezoidal sliding rail (1-3), the outer ends of the two tool plates (1-2) are respectively fixedly connected with a spring seat (1-4), the inner ends of the four spring seats (1-4) are respectively fixedly connected with a spring sleeve rod (1-5), and the four spring sleeve rods (1-5) are respectively sleeved with a first buffer spring (1-6); the buffer cross beam frame (2) is connected with the four spring sleeve rods (1-5) in a matching way;

the buffer transverse beam frame (2) comprises an underframe (2-1), a hinged seat (2-2), a side U-shaped frame (2-3), a side through groove (2-4), a rotating rod (2-5), a hinged arm (2-6) and a sliding seat (2-7); the front end of an underframe (2-1) is fixedly connected with two hinged seats (2-2), a storable crossbeam assembly (4) is rotatably connected on the two hinged seats (2-2), two ends of the underframe (2-1) are respectively fixedly connected with a side U-shaped frame (2-3), the outer ends of the two side U-shaped frames (2-3) are respectively provided with a side through groove (2-4), two ends of the two side U-shaped frames (2-3) are respectively fixedly connected with a rotating rod (2-5), four rotating rods (2-5) are respectively rotatably connected with an articulated arm (2-6), four articulated arms (2-6) are respectively rotatably connected with a sliding seat (2-7), four sliding seats (2-7) are respectively connected on four trapezoidal sliding rails (1-3) in a sliding fit manner, and four sliding seats (2-7) are respectively connected on four spring sleeve rods (1-5) in a sliding fit manner; the first buffer spring (1-6) is fixedly connected to the spring seat (1-4) and the sliding seat (2-7); the two unfolding adjusting mechanisms (3) are respectively arranged on the two side U-shaped frames (2-3);

the unfolding adjusting mechanism (3) comprises a motor (3-1), a lead screw (3-2), a side sliding block (3-3), a linkage block (3-4) and a linkage rod (3-5); the motor (3-1) is fixedly connected to the side U-shaped frame (2-3) through a motor frame, an output shaft of the motor (3-1) is connected with the lead screw (3-2) through a coupler, the side sliding block (3-3) is connected to the lead screw (3-2) through thread fit, the inner end of the side sliding block (3-3) is fixedly connected with the linkage block (3-4), the inner end of the linkage block (3-4) is rotatably connected with the linkage rod (3-5), and the linkage rod (3-5) is connected with the storable crossbeam assembly (4) in a fit manner; the side sliding blocks (3-3) are connected in the side through grooves (2-4) in a sliding fit mode, and the linkage blocks (3-4) are connected in the side U-shaped frames (2-3) in a sliding fit mode;

the retractable beam assembly (4) comprises a U-shaped frame (4-1), a long shaft (4-2), a baffle (4-3), a rotating rod (4-4), an inner sliding groove (4-5), a sliding rod (4-8), a T-shaped block (4-9) and a second buffer spring (4-10); the U-shaped frame (4-1) is fixedly connected to the long shaft (4-2), two ends of the long shaft (4-2) are respectively and rotatably connected to the two hinge seats (2-2), the lower end of the U-shaped frame (4-1) is fixedly connected with the baffle (4-3), and the outer ends of two ends of the U-shaped frame (4-1) are respectively and fixedly connected with the rotating rods (4-4); the lower ends of the linkage rods (3-5) are rotatably connected to the rotating rods (4-4), the inner ends of two ends of the U-shaped frame (4-1) are respectively provided with an inner chute (4-5), the inner ends of the two sliding rods (4-8) are symmetrically and fixedly connected into the U-shaped frame (4-1), the outer ends of the two sliding rods (4-8) are respectively and fixedly connected with a T-shaped block (4-9), the two T-shaped blocks (4-9) are symmetrically and fixedly arranged at two ends of the U-shaped frame (4-1), and two ends of the two T-shaped blocks (4-9) are respectively sleeved with a second buffer spring (4-10); the first buffer seat (5) is connected with the two sliding rods (4-8) in a matching way;

the first buffer seat (5) comprises a transverse frame plate (5-1), a rotating seat (5-3), a long rod (5-4) and a third buffer spring (5-5); two ends of the transverse frame plate (5-1) are respectively connected in the two rotating rods (4-4) in a sliding fit manner; two ends of the transverse frame plate (5-1) are respectively connected to the middle parts of the two sliding rods (4-8) in a sliding fit manner; two ends of the second buffer spring (4-10) are respectively and fixedly connected with the U-shaped frame (4-1) and the transverse frame plate (5-1); the middle part of the transverse frame plate (5-1) is fixedly connected with two rotating seats (5-3), two ends of the transverse frame plate (5-1) are respectively and fixedly connected with a long rod (5-4), and the two long rods (5-4) are respectively sleeved with a third buffer spring (5-5); the second buffer seat (6) is rotationally connected to the two rotating seats (5-3);

the second buffer seat (6) comprises a T-shaped seat (6-1), a rectangular through groove (6-2) and a locking screw (6-3); the middle part of the T-shaped seat (6-1) is rotatably connected to the two rotating seats (5-3), two rectangular through grooves (6-2) are respectively arranged at two ends of the T-shaped seat (6-1), the two long rods (5-4) are respectively connected in the two rectangular through grooves (6-2) in a sliding fit manner, two ends of the T-shaped seat (6-1) are respectively connected to one locking screw (6-3) in a threaded fit manner, the two locking screws (6-3) respectively correspond to the two long rods (5-4), and a fixed hook (7) is fixedly connected to the middle part of the T-shaped seat (6-1);

the storable beam component (4) further comprises fixing screw seats (4-6) and inserting screws (4-7), the two fixing screw seats (4-6) are symmetrically and fixedly connected to two ends of the U-shaped frame (4-1), and the two inserting screws (4-7) are respectively connected to the two fixing screw seats (4-6) in a threaded fit manner;

two ends of the transverse frame plate (5-1) are respectively fixedly connected with a movable screw seat (5-2); the movable screw seat (5-2) is positioned between the fixed screw seat (4-6) and the U-shaped frame (4-1); the two inserting screws (4-7) are respectively corresponding to the two movable screw seats (5-2).