CN109318665B

CN109318665B - Disc tractor with dual elastic buffering

Info

Publication number: CN109318665B
Application number: CN201811346624.3A
Authority: CN
Inventors: 周志
Original assignee: Changsha Sanglaite Agricultural Mechanical Equipment Co Ltd
Current assignee: Changsha Sanglaite Agricultural Mechanical Equipment Co Ltd
Priority date: 2018-11-13
Filing date: 2018-11-13
Publication date: 2021-12-21
Anticipated expiration: 2038-11-13
Also published as: CN109318665A

Abstract

The invention discloses a disc tractor with double elastic buffers, which comprises a tractor head, a trailer and a connecting buckle, wherein the tractor head is connected with the trailer through the connecting buckle; the connecting buckle comprises a headstock connecting piece, a middle connecting piece and a trailer connecting piece, and the front end surface of the first elastic component is tightly attached to the side surface of the regular prism of the first rotating shaft under the action of elastic force; the elastic buffer mechanism is arranged on the headstock and comprises an elastic pressing head, one end of the elastic pressing head is in elastic contact with the headstock connecting piece and used for applying elastic force to the connecting buckle, a guide pillar extending horizontally is arranged at the other end of the elastic pressing head, the guide pillar is inserted into the headstock and can stretch along the axis of the guide pillar, and a buffer spring is sleeved on the guide pillar. The double elastic buffering of this design has improved ride comfort, has reduced the vibration loss of vehicle.

Description

Disc tractor with dual elastic buffering

Technical Field

The invention relates to a disc tractor, in particular to a disc tractor with double elastic buffers.

Background

At present, the tractor carries out the farmland operation except that the corresponding agricultural implement of wearing, still will wear the trailer and transport the operation, needs the connector link to be connected between general disc tractor locomotive and the trailer, when the disc tractor traveles in the highway section of unevenness on road surface, because there is not any buffering between locomotive and the trailer, leads to the vehicle to jolt, reduces whole car life-span easily, also influences the comfort level of vehicle.

Disclosure of Invention

The present invention aims to solve the above technical problem at least to some extent. Therefore, the invention provides a disc type tractor with double elastic buffering.

The technical scheme adopted by the invention for solving the technical problems is as follows: a disc tractor with double elastic buffers comprises a tractor head, a trailer and a connecting buckle; the connecting buckle comprises a head connecting piece, a middle connecting piece and a trailer connecting piece, one end of the head connecting piece is rotatably connected with the head through a rotating shaft and is in contact action with the elastic pressing head, and the other end of the head connecting piece is rotatably connected with the middle connecting piece through a first rotating shaft which is horizontally arranged; one end of the trailer connecting piece is rotatably connected with the middle connecting piece through a second rotating shaft, and the other end of the trailer connecting piece is fixedly connected with the trailer; the first rotating shaft and the second rotating shaft are vertical all the time; one end of the first rotating shaft is fixedly connected with the middle connecting piece, the other end of the first rotating shaft is a regular polygon prism, the middle end of the first rotating shaft is a round shaft and is rotationally connected with the headstock connecting piece, and the edge of the regular polygon prism is an even number; a first elastic component is arranged on the headstock connecting piece; the first elastic component has telescopic elasticity, and when the headstock connecting piece is parallel to the middle connecting piece, the front end face of the first elastic component is tightly attached to the side face of the regular prism of the first rotating shaft under the action of elasticity; one end of the connecting buckle is rotatably connected with the vehicle head through a rotating shaft which is vertically arranged, and the other end of the connecting buckle is fixedly connected with the trailer; the elastic buffer mechanism is arranged on the headstock and comprises an elastic pressing head, one end of the elastic pressing head is in elastic contact with the headstock connecting piece and used for applying elastic force to the connecting buckle, a guide pillar extending horizontally is arranged at the other end of the elastic pressing head, the guide pillar is inserted into the headstock and can stretch along the axis of the guide pillar, and a buffer spring is sleeved on the guide pillar.

Further, the regular polygon prism is a regular quadrangular prism.

Further, the first elastic component comprises a first ejector block, a guide post connected with the first ejector block and a first spring sleeved on the guide post; one end of the first spring is in contact with the headstock connecting piece, and the other end of the first spring props against the first jacking block; the headstock connecting piece is provided with a first guide hole matched with the guide column, and the guide column is inserted in the first guide hole; the front end face of the first ejector block is abutted against the side face of the regular polygon prism of the first rotating shaft.

Furthermore, the end face of the first guide hole close to the first rotating shaft is provided with a stop column, and when the rear end face of the first ejecting block abuts against the stop column, the distance between the front end face of the first ejecting block and the axis of the regular polygon prism is smaller than the external circle radius of the regular polygon prism.

Further, intermediate junction spare middle part is provided with the open slot that extends along first pivot axis direction, run through from top to bottom and opening and first pivot back of the body, the outer end of open slot be provided with first pivot vertically second shaft hole, the trailer connecting piece is provided with the connecting portion that matches with the open slot width, connecting portion are provided with the connection shaft hole, connecting portion embedding open slot, the second pivot is worn to adorn downthehole at connection shaft hole and second shaft.

Further, the outer end face of the connecting part is a plane, a second elastic component is installed in the open slot, and the second elastic component comprises a third spring and a second ejector block matched with the open slot; one end of the third spring abuts against the bottom of the open groove, and the other end of the third spring is connected with the second top block; the second ejector block is connected in the open slot in a sliding mode and abuts against the outer end of the connecting portion, and when the trailer connecting piece is parallel to the middle connecting piece, the second ejector block is tightly attached to the outer end face of the connecting portion.

Further, the open slot lateral wall is provided with the spout that inwards extends from the opening part, second kicking block lateral wall is provided with the slide rail that matches with the spout.

The invention has the beneficial effects that: the elastic pressing head realizes the limitation of the stretching direction through the guide post, the buffer spring is sleeved on the guide post, the elastic force can be applied to the elastic pressing head during stretching, when the connecting buckle rotates, the elastic pressing head is pushed to contract, the elastic force is increased at the moment and is applied to the connecting buckle, and the first heavy elastic buffering is realized; first elasticity subassembly supports on the regular polygon prism of first pivot, and when regular polygon prism was rotatory, first elasticity subassembly can carry out elastic buffer in order to adapt to uneven road to the rotation of regular polygon prism, and first elasticity subassembly can make intermediate junction spare elasticity reset, realizes the second elastic buffer, and dual elastic buffer has improved ride comfort, has reduced the vibration loss of vehicle.

Drawings

The invention is further illustrated with reference to the following figures and examples.

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

FIG. 2 is a partial schematic view of the mounting structure of the present invention;

FIG. 3 is an exploded partial schematic view of the present invention in an installed condition;

FIG. 4 is a schematic view of a connector link mounting structure;

fig. 5 is an exploded view showing the installation state of the connector link;

FIG. 6 is a schematic view of another angle of the attachment of the connector link;

FIG. 7 is an exploded view of the connector link at another angle;

FIG. 8 is a top view of the mounting structure of the connector clasp;

FIG. 9 is a cross-sectional view taken at A-A of FIG. 8;

FIG. 10 is a cross-sectional view taken at B-B of FIG. 8;

FIG. 11 is a cross-sectional view taken at C-C of FIG. 8;

FIG. 12 is an enlarged view at D of FIG. 5;

FIG. 13 is an enlarged view at E of FIG. 5;

fig. 14 is a schematic structural view of the first rotating shaft.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and examples.

Referring to fig. 1 to 14, the disc tractor with double-elasticity buffering of the present invention includes a head 100, a trailer 102 and a hitch 101. One end of the connecting buckle 101 is rotatably connected with the vehicle head through a rotating shaft 1005 which is vertically arranged, and the other end of the connecting buckle is fixedly connected with the trailer 102; the locomotive 100 is provided with an elastic buffer mechanism, the elastic buffer mechanism comprises a spring head 1001, one end of the spring head 1001 is in elastic contact with the connecting buckle 101 and is used for applying elastic force to the connecting buckle 101, the other end of the spring head is provided with a guide pillar 1002 extending horizontally, the guide pillar 1002 is inserted into the locomotive 100 and can stretch along the axis of the guide pillar 1002, and a buffer spring 1003 is sleeved on the guide pillar 1002. The connector link 101 comprises a head connector 1, a middle connector 2 and a trailer connector 3. One end of the headstock connecting piece 1 is rotatably connected with the headstock 100 through a rotating shaft 1005 and is in contact action with the elastic pressing head 1001, and the other end of the headstock connecting piece is rotatably connected with the middle connecting piece 2 through a first rotating shaft 4 which is horizontally arranged. The first rotating shaft 4 and the second rotating shaft 5 are always vertical. The one end of locomotive connecting piece 1 and the contact of bullet pressure head 1001 is the arc surface, and the terminal surface of bullet pressure head 1001 and the contact of locomotive connecting piece 1 also is the arc surface, and elastic buffer mechanism is provided with two, supports in locomotive connecting piece 1 both sides, and when locomotive connecting piece 1 rotated about, the elastic buffer mechanism who corresponds with it played the cushioning effect. One end of the trailer connecting piece 3 is rotatably connected with the middle connecting piece 2 through a second rotating shaft 5, and the other end of the trailer connecting piece is fixedly connected with the trailer 102 through a bolt.

Specifically, the headstock connecting piece 1 is plate-shaped and is provided with four side surfaces, two opposite side surfaces of the headstock connecting piece are parallel, one of the other two side surfaces is a circular arc surface, and the other side surface is perpendicular to the two parallel side surfaces. And a headstock connecting hole 12 connected with a headstock is arranged at one end close to the arc surface. In order to save materials, a vertically-penetrating rectangular through hole 11 is formed in the middle of the vehicle head connecting piece 1. The first rotating shaft 4 comprises a regular polygon prism 42 and a shaft lever 41, one end of the first rotating shaft 4 is fixedly connected with the middle connecting piece 2, the other end of the first rotating shaft is provided with the regular polygon prism 42, the middle end of the first rotating shaft is provided with a round shaft and is rotationally connected with the head connecting piece 1, and the edge of the regular polygon prism 42 is an even number; the regular polygon prism 42 extends into the rectangular through hole 11, and a rotating shaft hole 16 used for being rotatably connected with the first rotating shaft 4 is arranged on one side wall of the rectangular through hole 11 far away from the vehicle head connecting hole 12. Axostylus axostyle 41 is the stepped shaft, including the first linkage segment 411 that sets gradually, middle shaft section 412 and second linkage segment 413, middle shaft section 412 matches with rotation shaft hole 16 and realizes rotating, first linkage segment 411 and second linkage segment 413 cross-section are the closed curve of being connected the constitution by one section straight line and pitch arc end to end, positive polygon prism 42 is provided with the transmission in order to realize the moment of torsion with the second connecting hole 421 that first linkage segment 411 matches, the outer end of positive polygon prism 42 extends has one section screw spindle and is equipped with the nut in order to realize the fixed connection of positive polygon prism 42 and axostylus axostyle 41, and the coincidence of positive polygon prism 42 axis and axostylus axostyle 41 axis. The middle connector 2 is provided with a first connection hole 24 matched with the second connection section 413 to realize the transmission of torque, and the outer end of the second connection section 413 extends to be provided with a section of threaded shaft and is provided with a nut to fix the middle connector 2 and the first rotating shaft 4. Due to the sectional characteristics of the first connecting section 411 and the second connecting section 413, the rotation of the middle connecting member 2 can drive the regular polygon prism 42 to rotate. The regular polygon prism is preferably a regular quadrangular prism, and when the head connecting piece 1 and the middle connecting piece 2 are parallel, the upper surface of the regular quadrangular prism is in a horizontal state.

The headstock connecting piece 1 is provided with a first elastic component 6 and a locking device; the first elastic component 6 has telescopic elastic force, and when the vehicle head connecting piece 1 is parallel to the middle connecting piece 2, the front end face of the first elastic component 6 is tightly attached to the side face of the regular prism of the first rotating shaft 4 under the action of the elastic force, namely the front end face of the first elastic component 6 is a vertical face.

The preferred construction of the first resilient member 6 will now be described in detail with reference to figures 5, 7 and 11.

The first elastic component 6 comprises a first top block 61, a guide post 63 connected with the first top block 61, and a first spring 62 sleeved on the guide post 63; one end of the first spring 62 is in contact with the headstock connecting piece 1, and the other end of the first spring props against the first jacking block 61; the vehicle head connecting piece 1 is provided with a first guide hole 14 matched with the guide column 63, the first guide hole 14 is arranged on the side face, parallel to the axis of the first rotating shaft 4, of the rectangular through hole 11, and the first guide hole 14 extends perpendicularly to the side face. The guide post 63 is inserted into the first guide hole 14. The first top block 61 is a rectangular block and is vertically arranged, and the front end face of the first top block 61 is supported on the side face of the regular polygon prism 42 of the first rotating shaft 4. The inner end surface of the first guide hole 14 is provided with a circle of first spring receiving grooves 142 annularly cut around the axis of the guide post 63, the rear end surface of the first top block 61 is provided with a second spring receiving groove 611, two ends of the first spring 62 are respectively sleeved in the first spring receiving grooves 142 and the second spring receiving grooves 611, and the first spring 62 is always in a compressed state. One end of the guide post 63 extending out of the headstock connecting piece 1 is connected with a limit nut 64, so that the first elastic component 6 is prevented from falling off when the first rotating shaft 4 is detached. For smoother rotation of the regular polygon prism 42, when the head connection member 1 and the middle connection member 2 are parallel, the upper and lower edges of the first top block 61 protrude out of the regular polygon prism 42.

When the trailer and the vehicle head rotate relatively, the side turning is caused for preventing the overlarge rotation angle. In this embodiment, the end surface of the first guide hole 14 close to the first rotating shaft 4 is provided with a stop column 141, when the rear end surface of the first top block 61 abuts against the stop column 141, that is, when the regular polygon prism 42 rotates to abut the first top block 61 against the stop column 141, the regular polygon prism 42 cannot rotate any more, and at this time, the distance between the front end surface of the first top block 61 and the axis of the regular polygon prism 42 is smaller than the circumscribed radius of the regular polygon prism 42. The rotation angle may be limited by setting the height of the stopper post 141, and the rotation angle range of the first rotation shaft 4 becomes smaller as the height of the stopper post 141 increases.

The preferred construction of the capture device is described below in conjunction with figures 4, 5, 7, 9 and 12.

The locking device is used for locking the headstock connecting piece 1 and the middle connecting piece 2 in a parallel state. The capture device includes a retention assembly 7 and a locking mechanism 9. Preferably, the retention assembly 7 comprises a pressing block 71, a guide rod 72 and a driving mechanism 73; the pressing block 71 is used for pressing the regular polygon prism 42 of the first rotating shaft 4 to align the middle connecting piece 2 to be parallel to the headstock connecting piece 1; the pressing block 71 is a vertically-arranged rectangular block, the front end face of the pressing block is a vertical face, and when the front end face presses the side face of the regular polygon prism 42, the middle connecting piece 2 reaches a righting state, namely is parallel to the headstock connecting piece 1.

The front end of the guide rod 72 is fixedly connected with the pressing block 71, the guide rod 72 is installed in a corresponding hole of the vehicle head connecting piece 1 and can only stretch out and draw back along the axis of the guide rod, a second guide hole 13 matched with the guide rod 72 is formed in the side face, parallel to the axis of the first rotating shaft 4, of the rectangular through hole 11, the guide rod 72 is inserted into the second guide hole 13, and the sections of the guide rod 72 and the second guide hole 13 are rectangular, so that the guide rod 72 can be prevented from rotating. The driving mechanism 73 is used for pushing the guide rod 72 and the pressing block 71 to press the first rotating shaft 4, in this embodiment, the driving mechanism 73 is a hydraulic oil cylinder, the hydraulic oil cylinder is installed on the side surface of the head connecting piece 1, and the telescopic end of the hydraulic oil cylinder extends into the second guide hole 13 to push the guide rod 72, of course, in other embodiments, the driving mechanism may be a motor and is connected with the guide rod 72 through a screw rod to push the guide rod 72. When the retention component 7 presses and swings the intermediate connector 2, the locking mechanism 9 locks the guide rod 72 or the pressing block 71 to fix the intermediate connector 2. Thus, the driving mechanism 73 does not need to work all the time, and energy is saved. The preferred form of construction of the locking mechanism 9 is described in detail below.

The guide rod 72 is provided with a lock hole 721, the locking mechanism 9 comprises an inserting column 91, a shift lever 92 and a second spring 93, the head connecting piece 1 is provided with a mounting hole 15 for mounting the locking mechanism 9, and the lock hole 721 and the mounting hole 15 are both horizontally arranged and extend in a direction parallel to the axis of the first rotating shaft 4. The insert post 91 is matched with the mounting hole 15 and the lock hole 721. A fixing plate 94 is mounted outside the mounting hole 15 to fix the locking mechanism 9 in the mounting hole 15. The fixing plate 94 is buried in a groove to prevent it from interfering with the rotation of the intermediate link 2.

The second spring 93 is disposed between the rear end of the plunger 91 and the fixing plate 94, and the front end of the plunger 91 is a tapered surface for inserting into the locking hole 721. When the pressing block 71 swings the middle connecting piece 2, the inserting column 91 is aligned with the locking hole 721 and is inserted into the locking hole 721 under the action of the second spring 93 to lock the guide rod 72, so that the middle connecting piece 2 is always in a state of being parallel to the headstock connecting piece 1.

The shift lever 92 is fixedly connected with the insert column 91 and vertically extends upwards to protrude out of the surface of the headstock connecting piece 1. When the retention assembly 7 is not required to operate, the plunger 91 may be unlocked from the guide rod 72 by toggling the toggle lever 92. During normal driving, the first rotating shaft 4 may slightly rotate due to vibration and other factors, and the guide rod 72 may not press the first rotating shaft 4 right without being pushed by external force, so that the situation of false locking may not occur. For structural symmetry and stability, two retention assemblies 7 and two locking mechanisms 9 are symmetrically arranged and are respectively arranged on two sides of the rectangular through hole 11.

The connection structure at the second rotating shaft 5 will be described in detail.

The middle part of the middle connecting piece 2 is provided with an open slot 21 extending along the axial direction of the first rotating shaft 4, the open slot 21 vertically runs through and the opening is opposite to the first rotating shaft 4, and the first connecting hole 24 runs through the bottom of the open slot 21.

The outer end of open slot 21 is provided with the second shaft hole 23 perpendicular with first pivot 4, trailer connecting piece 3 is provided with connecting portion 31 with the width matching of open slot 21, connecting portion 31 is provided with connecting shaft hole 311, connecting portion 31 embedding open slot 21, the dress is worn in connecting shaft hole 311 and second shaft hole 23 to second pivot 5.

In order to make the second rotating shaft 5 also have elastic buffering, the design is also provided with a second elastic component 8. Specifically, the outer end surface of the connecting portion 31 is a plane, when the trailer connecting member 3 is parallel to the middle connecting member 2, the outer end surface of the connecting portion 31 is a vertical surface, the connecting portion 31 is preferably a rectangular parallelepiped, and the connecting shaft hole 311 is disposed on the axis of the rectangular parallelepiped. A second elastic component 8 is installed in the open slot 21, and the second elastic component 8 comprises a third spring 82 and a second top block 81 matched with the open slot 21; one end of the third spring 82 is abutted against the bottom of the opening groove 21, and the other end is connected with the second top block 81. Preferably, the bottom of the open slot 21 is provided with a third spring receiving slot 25, the second top block 81 is provided with a fourth spring receiving slot 812, and two ends of the third spring 82 are respectively sleeved in the third spring receiving slot 25 and the fourth spring receiving slot 812. The second top block 81 is embedded in the open groove 21. The second top block 81 is slidably connected in the opening groove 21, the second top block 81 is supported at the outer end of the connecting portion 31, and the second top block 81 is preferably a vertically arranged square block. When the trailer connector 3 is parallel to the middle connector 2, the second top block 81 is closely attached to the outer end face of the connecting part 31. The sliding mode of the second top block 81 is preferable, the side wall of the opening groove 21 is provided with a sliding groove 22 extending inwards from the opening, the side wall of the second top block 81 is provided with a sliding rail 811 matched with the sliding groove 22, and two sliding rails 811 and two sliding grooves 22 are symmetrically arranged.

In order to limit the angle of rotation of the trailer connection 3 relative to the intermediate connection 2, the trailer is prevented from tipping over. The vertical distance between the second rotating shaft 5 and the bottom of the sliding groove 22 is smaller than the sum of the thickness of the second ejector block 81 and the radius of the circumscribed circle of the connecting part 31, and the length of the sliding rail 811 is consistent with the thickness of the second ejector block 81. That is, when the trailer connecting element 3 rotates, the edge of the connecting part 31 presses the second top block 81 to push the second top block 81 to retreat, when the second top block 81 touches the bottom of the sliding chute 22, the second top block 81 can not retreat, and because the radius of the connecting part 31 is larger than the distance between the second top block 81 and the axis of the second rotating shaft 5 at the moment, the connecting part 31 can not rotate any more, if the connecting part 31 turns over one surface, the surface acting with the second top block 81 changes, and the connecting part 31 can not be reset under the action of the second top block 81. For smoother rotation of the coupling part 31, the upper and lower edges of the second top block 81 protrude out of the coupling part 31 when the intermediate coupling member 2 is parallel to the trailer coupling member 3.

The working principle of the connecting buckle is as follows:

when the headstock connecting piece 1 rotates around the rotating shaft 1005, the elastic pressing head 1001 is pressed to retract along the guide pillar 1002, and the buffer spring 1003 is compressed in a linked manner, so that the headstock connecting piece 1 is elastically buffered. The head connection 1 is connected to the head via a head connection hole 12, and the trailer connection 3 is provided with a trailer connection hole 32 for connection to a trailer. The headstock connecting piece 1 is rotatably connected with the headstock and rotates along a vertical shaft. The headstock connecting piece 1 is rotatably connected with the middle connecting piece 2 through a first rotating shaft, and the middle connecting piece 2 is rotatably connected through a second rotating shaft. The three rotating shafts are mutually vertical to form rotation in three directions. When the middle connecting piece 2 and the first rotating shaft 4 are forced to rotate together, the regular polygon prism 42 is driven to rotate, the first ejecting block 61 is pressed to retract by the rotation of the regular polygon prism 42, the first ejecting block 61 gives elastic force for resetting the regular polygon prism 42, and therefore the rotation of the rotating shaft of the first rotating shaft 4 is elastically buffered, and when no external force is applied, the elastic force can be elastically pressed by the first ejecting block 61 to reset. The second shaft 5 has the same principle of action and depends on the action of two planes, so that the second ejector block 81 can play a role of elastic buffering on the rotation of the second shaft 5, and the purpose of the thrust of the elastic buffering is to reset the trailer connecting piece 3. Therefore, the whole connecting buckle can realize 3-axis rotation and has the functions of elastic buffering and automatic resetting. In addition, when the first rotating shaft 4 is not required to rotate, the regular polygon prism 42 can be locked by the retaining component 7 so as to lock the first rotating shaft 4.

The above embodiments are only for illustrating the technical solutions of the present invention and are not limited thereto, and any modification or equivalent replacement without departing from the spirit and scope of the present invention should be covered within the technical solutions of the present invention.

Claims

1. The utility model provides a disk tractor with dual elasticity buffering which characterized in that: comprises a headstock (100), a trailer (102) and a connecting buckle (101);

the connecting buckle (101) comprises a head connecting piece (1), a middle connecting piece (2) and a trailer connecting piece (3), one end of the head connecting piece (1) is rotatably connected with the head (100) through a rotating shaft (1005) and is in contact with the elastic pressing head (1001), and the other end of the head connecting piece is rotatably connected with the middle connecting piece (2) through a first rotating shaft (4) which is horizontally arranged;

one end of the trailer connecting piece (3) is rotatably connected with the middle connecting piece (2) through a second rotating shaft (5), and the other end of the trailer connecting piece is fixedly connected with the trailer (102);

the first rotating shaft (4) and the second rotating shaft (5) are vertical all the time;

one end of the first rotating shaft (4) is fixedly connected with the middle connecting piece (2), the other end of the first rotating shaft is provided with a regular polygon prism (42), the middle end of the first rotating shaft is provided with a circular shaft and is rotatably connected with the headstock connecting piece (1), and the edge of the regular polygon prism (42) is an even number;

a first elastic component (6) is arranged on the headstock connecting piece (1);

the first elastic component (6) has telescopic elasticity, and when the headstock connecting piece (1) is parallel to the middle connecting piece (2), the front end face of the first elastic component (6) is tightly attached to the side face of the regular prism of the first rotating shaft (4) under the action of the elasticity;

one end of the connecting buckle (101) is rotatably connected with the vehicle head through a rotating shaft (1005) which is vertically arranged, and the other end of the connecting buckle is fixedly connected with the trailer (102);

the motorcycle head (100) is provided with an elastic buffer mechanism, the elastic buffer mechanism comprises an elastic pressing head (1001), one end of the elastic pressing head (1001) is in elastic contact with the motorcycle head connecting piece (1) and is used for applying elastic force to the connecting buckle (101), the other end of the elastic pressing head is provided with a horizontally extending guide pillar (1002), the guide pillar (1002) is inserted into the motorcycle head (100) and can stretch along the axis of the guide pillar, and a buffer spring (1003) is sleeved on the guide pillar (1002);

the first elastic assembly (6) comprises a first ejector block (61), a guide column (63) connected with the first ejector block (61), and a first spring (62) sleeved on the guide column (63);

one end of the first spring (62) is in contact with the headstock connecting piece (1), and the other end of the first spring props against the first jacking block (61);

the headstock connecting piece (1) is provided with a first guide hole (14) matched with the guide post (63),

the guide post (63) is inserted into the first guide hole (14);

the front end face of the first ejector block (61) is abutted against the side face of the regular polygon prism (42) of the first rotating shaft (4).

2. The disc tractor with dual springing bumpers as defined in claim 1, wherein: the regular polygon prism (42) is a regular quadrangular prism.

3. The disc tractor with dual springing bumpers as defined in claim 1, wherein: the end face, close to the first rotating shaft (4), of the first guide hole (14) is provided with a stop column (141), when the rear end face of the first ejecting block (61) abuts against the stop column (141), the distance between the front end face of the first ejecting block (61) and the axis of the regular polygon prism (42) is smaller than the radius of a circumscribed circle of the regular polygon prism (42).

4. The disc tractor with dual springing bumpers of claim 2, wherein: intermediate junction spare (2) middle part is provided with along open slot (21) that first pivot (4) axis direction extends, run through and the opening and first pivot (4) mutually from top to bottom open slot (21), the outer end of open slot (21) is provided with first pivot (4) vertically second shaft hole (23), trailer connecting piece (3) are provided with connecting portion (31) that match with open slot (21) width, connecting portion (31) are provided with connection shaft hole (311), connecting portion (31) embedding open slot (21), second pivot (5) are worn to adorn in connecting shaft hole (311) and second shaft hole (23).

5. The disc tractor with dual springing bumpers of claim 4, wherein: the outer end face of the connecting part (31) is a plane, a second elastic component (8) is installed in the open slot (21), and the second elastic component (8) comprises a third spring (82) and a second ejector block (81) matched with the open slot (21);

one end of the third spring (82) abuts against the bottom of the open slot (21), and the other end of the third spring is connected with the second ejector block (81);

the second ejector block (81) is connected in the open groove (21) in a sliding mode, the second ejector block (81) abuts against the outer end of the connecting portion (31), and when the trailer connecting piece (3) is parallel to the middle connecting piece (2), the second ejector block (81) is tightly attached to the outer end face of the connecting portion (31).

6. The disc tractor with dual springing bumpers of claim 5, wherein: the lateral wall of the open slot (21) is provided with a sliding groove (22) extending inwards from the opening, and the lateral wall of the second ejector block (81) is provided with a sliding rail (811) matched with the sliding groove (22).