CN117948381A - Track cushioning structure and track wheelchair thereof - Google Patents

Abstract

The invention provides a track cushioning structure and a track wheelchair thereof, comprising a right track assembly, a left track assembly and a vehicle body chassis; the chassis of the vehicle body comprises a protective frame, a connecting shaft, a vertical rod, an overhanging frame and a rotating shaft, wherein the right crawler belt assembly and the left crawler belt assembly are respectively arranged at two ends of the connecting shaft, and the top end of the connecting shaft is rotationally connected with the protective frame; an overhanging frame is fixed on the side part of the protective frame; the top end of the overhanging frame is provided with a rotating shaft, and two vertical rods are fixed on the side part of the connecting shaft; the side part of the chassis of the vehicle body is provided with a torsion eliminating and changing control assembly, the torsion eliminating and changing control assembly comprises a rocker arm and two bidirectional compression shock absorbers, the center of the rocker arm is rotationally connected with a rotating shaft, and two ends of the rocker arm are rotationally connected with two vertical rods through one bidirectional compression shock absorber respectively. The invention enables the track wheelchair to quickly drive on uneven terrain, and the seat can buffer and shock-proof the forward and backward tilting of the track under the buffer action of the push-pull bidirectional compression shock absorber, so that great shaking shock can not occur.

Description

Track cushioning structure and track wheelchair thereof

Technical Field

The invention relates to the technical field of wheelchair equipment, in particular to a track cushioning structure and a track wheelchair thereof.

Background

The wheelchair is a chair with wheels for helping to replace walking, and is an important moving tool for the home rehabilitation, turnover transportation, treatment and outgoing activities of wounded persons, patients and disabled persons; the track wheelchair is one of wheelchairs.

The existing crawler locomotives in the general society comprise tanks, the crawler wheels are driving and guiding wheels at two ends, the crawler wheels are fixedly arranged in a suspending mode and leave the ground, the small supporting wheels are arranged below the crawler frame and are provided with buffering and damping functions, and the crawler wheels form an inverted trapezoid shape. Because the track wheelchair is small in size and short in track length, the inverted trapezoid is arranged, the contact area of the track with the ground is small, and the track wheelchair is more than a semicircle placed on the ground, and is easy to turn over upwards and downwards, particularly the steep upwards and downwards, and the risk of turning backwards is very easy to occur. The crawler wheelchair is like a rigid square box, and can run on uneven terrain with slightly larger concave-convex difference, the obstacle crossing and bank crossing can cause the wheelchair to shake violently and jolt, the driving is uncomfortable, when one side of the crawler end head runs at a high position, another end head is required to have a suspension phenomenon, the suspension torsion not only can bring damage to the wheelchair frame, but also can cause the crawler wheelchair to incline forwards or backwards and jolt, and the overturning danger is easy to occur if the driver carelessly.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a track cushioning structure and a track wheelchair thereof, which can solve the existing problems.

In order to achieve the above object, the technical scheme of the present invention is as follows:

The invention is realized by the following technical scheme: the crawler cushioning structure comprises a right crawler assembly and a left crawler assembly, wherein the right crawler assembly and the left crawler assembly are connected through a vehicle body chassis; the automobile body chassis comprises a protection frame, a connecting shaft, a vertical rod, an overhanging frame and a rotating shaft, wherein a right crawler assembly and a left crawler assembly are respectively arranged at two ends of the connecting shaft, and the top end of the connecting shaft is rotationally connected with the protection frame; an overhanging frame is fixed on the side part of the protective frame; the top end of the outer extending frame is provided with a rotating shaft, and two vertical rods are fixed on the side part of the connecting shaft;

The side part of the vehicle body chassis is provided with a torsion-eliminating and changing control assembly, the torsion-eliminating and changing control assembly comprises a rocker arm and two bidirectional compression shock absorbers, the center of the rocker arm is rotationally connected with the rotating shaft, and two ends of the rocker arm are rotationally connected with two vertical rods through one bidirectional compression shock absorber respectively.

The bidirectional compression shock absorber comprises a connector, an outer sleeve, an inner insertion cylinder, a spring and a locking rod; the inner inserting cylinder is inserted into and slidingly connected with the outer sleeve, two sides of the inner inserting cylinder and the outer sleeve are respectively provided with mutually matched sliding grooves, two locking rods are respectively inserted into the mutually matched sliding grooves, one locking rod is fixed with the inner inserting cylinder, the other locking rod is fixed with the outer sleeve, and the two locking rods are connected through a spring; the two ends of the outer sleeve and the inner inserting cylinder are respectively fixed with a connector, one connector is connected with the rocker arm, and the other connector is connected with the vertical rod.

Further, the vehicle body chassis further comprises a reinforcing beam, a supporting beam, a longitudinal beam and a back rod; the protective frame adopts a shape like a Chinese character 'kou', and a reinforcing beam is arranged in the protective frame; support beams are fixed on two sides of the protective frame, and the two support beams are connected through a back rod; the back rod and the overhanging frame are fixed through a longitudinal beam.

A crawler wheelchair comprises the shock absorption structure, a seat longitudinal balance swing transverse balance guide rail, a transverse swing balance seat frame, a protection frame and a seat; the top end of the chassis of the vehicle body is rotationally connected with a seat longitudinal balance swing transverse balance guide rail which is in sliding connection with the transverse swing balance seat frame; a seat is arranged at the top end of the transverse swinging balance seat frame; the side part of the chassis of the automobile body is fixed with a protective frame.

Further, the seat longitudinal balance swinging transverse balance guide rail comprises a guide rail body and a mounting frame, wherein the cross section of the guide rail body adopts a U-shaped structure, and the mounting frames are fixed at the two ends of the guide rail body; the mounting frame is rotationally connected with the back rod through a pin shaft.

Further, the transverse swinging balance seat frame comprises pedals, a placing frame, pulleys, inclined plates, side protection beams, cross beams, connecting beams and an outer frame; the seat is arranged at the top end of the outer frame, side protection beams are fixed on two sides of the outer frame, and a cross beam is fixed between the two side protection beams; two connecting beams are fixed between the outer frames, and the bottom ends of the outer frames are connected with a placing rack; a pedal is fixed at the end part of the placing frame; two groups of outwards inclined installation components are fixed at the bottom end of each cross beam, and each group of installation components comprises two inclined plates which are oppositely arranged; two pulleys are rotatably connected between the two sloping plates; the seat longitudinal balance swinging transverse balance guide rail penetrates through and is connected with the two pulleys in a sliding mode.

Furthermore, the cross sections of the outer frame and the side protection beams are of U-shaped structures, and the cross section of the placing rack is of L-shaped structures; and the corners of the transverse swinging balance seat frame are chamfered.

Further, the protection frame comprises a vertical rod, an inclined strut, a cross rod and a fixed rod; the two vertical rods are connected through a cross rod, a fixing rod is fixed on the side part of the bottom end of each vertical rod, and the fixing rods are fixed with the overhanging frame; inclined supporting rods are fixed on the side parts of the vertical rods, and the inclined supporting rods are fixed with the longitudinal beams; the vertical rod adopts a structure that the bottom end is vertical and the top end is bent.

Compared with the prior art, the invention has the beneficial effects that:

When the track cushioning structure is applied to a wheelchair, the track wheelchair can quickly drive on uneven terrain, and the seat can be subjected to forward tilting and backward tilting under the cushioning effect of the push-pull bidirectional compression cushioning device, so that the track can be cushioned and vibrated, and the large shaking vibration can not occur; the two crawler belt assemblies and the vehicle body chassis are connected to the rocker arm of the torsion eliminating and changing control assembly through two bidirectional compression shock absorbers, the crawler belt wheelchair rapidly runs on uneven terrain, under the conversion of the rocker arm, the two crawler belt pulleys can reversely twist around the middle rotating shaft to eliminate torsion, the crawler belt ends alternately lift up and down and meet the high and low level, the change along with the change of the terrain is realized, the cross avoidance and the shock absorption of the crawler belt ends are realized, the front and rear inclined sides of the crawler belt wheelchair are caused, and the inclined angle is reduced by half, so that the shaking shock is also reduced by half. Meanwhile, under the conversion of the rocker arm, the load can be passively converted with the fluctuation of the rugged ground, so that the single-side crawler belt end is lifted up by crossing the obstacle, the load can not be gradually increased along with the lifting of the crawler belt end, the load is lightened just opposite to the load, the single-side crawler belt end is lifted up by crossing the obstacle, the climbing is not laborious, and the single-side crawler belt can be relaxed and powerful like driving on a flat road.

The wheelchair runs on uneven terrain, the seat slides along the seat longitudinal balance swing transverse balance guide rail along with the transverse swing balance seat frame, and the seat longitudinal balance swing transverse balance guide rail swings on the chassis of the vehicle body under the adjustment of passive displacement, so that the wheelchair can always keep a balance posture of the seat vertical horizon in a mode of moving left and right and swinging front and back through the seat when running on uneven terrain, and rollover is avoided; the crawler wheelchair is fast to run, has certain flexibility, reduces consumption and damage caused by torsion, increases the endurance time and the service life of the crawler wheelchair, and improves the smooth safety and the quick passing capability of the crawler wheelchair in driving comfort.

Drawings

The disclosure of the present invention is described with reference to the accompanying drawings. It should be understood that the drawings are for purposes of illustration only and are not intended to limit the scope of the present invention in which like reference numerals are used to designate like parts. Wherein:

FIG. 1 is a schematic view of an exploded view of a crawler wheelchair according to the present invention;

FIG. 2 is a schematic diagram of the overall structure of the track wheelchair according to the embodiment of the present invention;

FIG. 3 is a schematic view of the chassis structure of the vehicle body according to the embodiment of the present invention;

FIG. 4 is a schematic view of a longitudinal balance swing transverse balance rail structure of a seat according to an embodiment of the present invention;

FIG. 5 is a schematic view of the connection of the seat longitudinal balance swing transverse balance rail and the chassis of the vehicle body according to the embodiment of the invention;

FIG. 6 is a schematic view of a structure of a lateral swing balance seat frame according to an embodiment of the present invention;

FIG. 7 is a schematic view of a structure of a lateral swing balance seat frame and a longitudinal balance swing lateral balance rail of a seat according to an embodiment of the present invention;

FIG. 8 is a schematic view of the overall side of an embodiment of the present invention;

FIG. 9 is an enlarged schematic view of the structure of FIG. 8 in accordance with the embodiment of the present invention;

FIG. 10 is a schematic cross-sectional view of a bi-directional compression shock absorber according to an embodiment of the present invention;

FIG. 11 is a schematic diagram of a two-way compression damper in an embodiment of the present invention;

FIG. 12 is a schematic view of a cross lifting structure of a cushioning structure in an embodiment of the present invention;

FIG. 13 is a schematic view of a left track assembly of a wheelchair in an embodiment of the present invention;

FIG. 14 is a schematic view of the structure of the wheelchair in the case of the present invention for balancing the downward slope;

FIG. 15 is a schematic view of the structure of the wheelchair in the case of the present invention for the ascending balance;

FIG. 16 is a schematic view of the left and right track assemblies of the wheelchair in the present invention;

FIG. 17 is a schematic diagram of a side-tilt balancing wheelchair according to an embodiment of the present invention.

The reference numerals in the drawings indicate: 1. a seat; 2. a transverse swinging balance seat frame; 21. a pedal; 22. a placing rack; 23. a pulley; 24. a sloping plate; 25. a side guard beam; 26. a cross beam; 27. a connecting beam; 28. an outer frame; 3. the seat longitudinally balances the swing transverse balance guide rail; 31. a guide rail body; 32. a mounting frame; 4. a right track assembly; 5. a left track assembly; 6. a vehicle chassis; 61. a protective frame; 62. a connecting shaft; 63. reinforcing the beam; 64. a vertical rod; 65. a support beam; 66. a longitudinal beam; 67. an overhanging rack; 68. a rotation shaft; 69. a back bar; 7. a torsion-eliminating and replacement control assembly; 71. a rocker arm; 72. a bi-directional compression shock absorber; 721. a connector; 722. an outer sleeve; 723. an inner insertion tube; 724. a spring; 725. a locking lever; 8. a protective frame; 81. a vertical rod; 82. a diagonal brace; 83. a cross bar; 84. and a fixing rod.

Detailed Description

It is to be understood that, according to the technical solution of the present invention, those skilled in the art may propose various alternative structural modes and implementation modes without changing the true spirit of the present invention. Accordingly, the following detailed description and drawings are merely illustrative of the invention and are not intended to be exhaustive or to limit the invention to the precise form disclosed.

The invention provides a track cushioning structure and a track wheelchair thereof, in particular to a track cushioning structure which comprises a right track assembly 4 and a left track assembly 5, wherein the right track assembly 4 and the left track assembly 5 are connected through a vehicle body chassis 6 as shown in figure 3; the vehicle body chassis 6 comprises a protective frame 61, a connecting shaft 62, a vertical rod 64, an overhanging frame 67 and a rotating shaft 68, wherein the right crawler belt assembly 4 and the left crawler belt assembly 5 are respectively arranged at two ends of the connecting shaft 62, and the top end of the connecting shaft 62 is rotatably connected with the protective frame 61; an overhanging frame 67 is fixed on the side part of the protective frame 61 through bolts; a rotating shaft 68 is arranged at the top end of the outer extending frame 67, and two vertical rods 64 are fixed at the side part of the connecting shaft 62; the vehicle chassis 6 further includes reinforcement beams 63, support beams 65, longitudinal beams 66, and back bars 69; the protective frame 61 adopts a shape like a Chinese character 'kou', and a reinforcing beam 63 is arranged in the protective frame 61; support beams 65 are fixed on two sides of the protective frame 61, the top ends of the support beams 65 incline outwards, and the two support beams 65 are connected through a back rod 69; the back bar 69 and the outrigger 67 are fixed by a longitudinal beam 66.

The side of the chassis 6 is provided with a torsion-eliminating and changing control assembly 7, the torsion-eliminating and changing control assembly 7 comprises a rocker 71 and two bidirectional compression dampers 72, as shown in fig. 8, the center of the rocker 71 is rotatably connected with the rotating shaft 68, and two ends of the rocker 71 are rotatably connected with the two vertical rods 64 through one bidirectional compression damper 72 respectively. Illustratively, the bi-directional compression damper 72 includes a connector 721, an outer sleeve 722, an inner barrel 723, a spring 724, and a locking lever 725, as shown in fig. 9, 10, and 11; the inner insertion cylinder 723 is inserted into and slidingly connected with the outer sleeve 722, two sides of the inner insertion cylinder 723 and the outer sleeve 722 are respectively provided with mutually matched sliding grooves, two locking rods 725 are respectively inserted into the mutually matched sliding grooves, one locking rod 725 is fixed with the inner insertion cylinder 723, the other locking rod 725 is fixed with the outer sleeve 722, and the two locking rods 725 are connected through a spring 724; both ends of the outer sleeve 722 and the inner insertion tube 723 are fixed with connectors 721, wherein one of the other ends of the connectors 721 is connected with the rocker arm 71, and the other connector 721 is connected with the vertical rod 64; when the bidirectional compression damper 72 is compressed in any direction, for example, if the side of the inner cylinder 723 is compressed, the inner cylinder 723 is driven to drive the locking rod 725 fixedly connected with the inner cylinder 723 to move in the sliding groove towards the outer sleeve 722, and the spring 724 is compressed, otherwise, the outer sleeve 722 is compressed, and the spring 724 also compresses to realize bidirectional compression damping.

The track cushioning structure of the present invention is applied to a wheelchair, but the use of the cushioning structure of the present invention is not limited to a wheelchair. The track wheelchair of the invention is shown in fig. 1 and 2, and comprises a cushioning structure, a seat longitudinal balance swing transverse balance guide rail 3, a transverse swing balance seat frame 2, a protection frame 8 and a seat 1; the shock absorption structure comprises a right track assembly 4 and a left track assembly 5, the right track assembly 4 and the left track assembly 5 are connected through a vehicle body chassis 6, a torsion elimination and replacement control assembly 7 is arranged on the side part of the vehicle body chassis 6, the structure 3 of the vehicle body chassis 6 is shown, and the torsion elimination and replacement control assembly 7 is shown in fig. 8, 9, 10 and 11;

The top end of the vehicle body chassis 6 is rotationally connected with a seat longitudinal balance swing transverse balance guide rail 3, and the seat longitudinal balance swing transverse balance guide rail 3 is slidingly connected with the transverse swing balance seat frame 2; the top end of the transverse swinging balance seat frame 2 is provided with a seat 1; the side part of the chassis 6 is fixed with a protective frame 8.

Specifically, the seat longitudinal balance swing transverse balance guide rail 3 includes a guide rail body 31 and a mounting rack 32, as shown in fig. 4, the cross section of the guide rail body 31 adopts a "U" structure, and the mounting racks 32 are fixed at two ends of the guide rail body 31; the mounting frame 32 is rotatably connected with the back rod 69 through a pin shaft; the corners of the seat longitudinal balance swing transverse balance guide rail 3 are chamfered, and the seat longitudinal balance swing transverse balance guide rail 3 is connected with the vehicle chassis 6 and then shown in fig. 5.

The transverse swinging balance seat frame 2 comprises pedals 21, a placing frame 22, pulleys 23, an inclined plate 24, side protection beams 25, a cross beam 26, a connecting beam 27 and an outer frame 28, as shown in fig. 6; the seat 1 is arranged at the top end of the outer frame 28, side protection beams 25 are fixed on two sides of the outer frame 28, the cross section of each side protection beam 25 adopts a U-shaped structure, and a cross beam 26 is fixed between the two side protection beams 25; two connecting beams 27 are fixed between the outer frames 28, the bottom ends of the outer frames 28 are connected with a placing frame 22, and the cross section of the placing frame 22 adopts an L-shaped structure; a pedal 21 is fixed at the end part of the placing frame 22; two groups of outwards inclined mounting assemblies are fixed at the bottom end of each cross beam 26, and each group of mounting assemblies comprises two inclined plates 24 which are oppositely arranged; two pulleys 23 are rotatably connected between the two sloping plates 24; the corners of the transverse swinging balance seat frame 2 are chamfered; the seat longitudinal balance swing transverse balance guide rail 3 penetrates through and is slidably connected with the two pulleys 23, specifically, the guide rail body 31 is located between the two pulleys 23 and is slidably connected with the two pulleys 23, as shown in fig. 7, since the arc-shaped parts of the guide rail body 31 comprise two groups, in order to ensure that the transverse swing balance seat frame 2 can stably slide on the guide rail body 31 to adapt to different terrains, the two arc-shaped parts of the guide rail body 31 are slidably connected with the four groups of pulleys 23 penetrating through handles.

For increasing the safety of the wheelchair, the protection frame 8 includes a vertical bar 81, an inclined strut 82, a cross bar 83 and a fixing bar 84; two vertical rods 81 are arranged, the two vertical rods 81 are connected through a cross rod 83, a fixing rod 84 is fixed on the side part of the bottom end of each vertical rod 81, and the fixing rods 84 are fixed with the overhanging frames 67; inclined diagonal braces 82 are fixed to the side portions of the vertical bars 81, and the diagonal braces 82 are fixed to the stringers 66; the vertical rod 81 adopts a structure that the bottom end is vertical and the top end is curved, as shown in fig. 8.

The right track assembly 4 and the left track assembly 5 of the present invention are of a prior art structure, the battery is mounted on the outrigger 67 of the wheelchair, and the battery is used as a power source to drive the track wheels of the right track assembly 4 and the left track assembly 5 to move by a motor.

When the track wheelchair is used, as shown in fig. 12, when the front end of the right track assembly 4 is blocked by an obstacle to rise, the rear end of the right track assembly 4 is forced to be pressed down to drive the connecting shaft 62 to rotate clockwise, so as to drive the vertical rod 64 to rotate synchronously, and when the vertical rod 64 rotates, the rocker arm 71 drives the bidirectional compression shock absorber 72 at the right end to compress the compression spring 724 and push the torsion-eliminating control assembly 7 to rotate clockwise corresponding to the rotating shaft 68, and the left track assembly 5 moves opposite to the right track assembly 4; alternately lifting, avoiding and buffering vibration and converting and torsion eliminating. When the left crawler belt assembly 5 is lifted up by encountering an obstacle, as shown in fig. 13, the control assembly 7 is replaced by torsion elimination, and the alternate lifting, avoiding and the damping and the torsion elimination are realized. As shown in fig. 16, when the two crawler wheels of the wheelchair meet the obstacle, the wheelchair can reversely twist around the rotating shaft 68 to eliminate torsion, the crawler ends alternately rise and fall when meeting high and low, and change along with the change of the terrain, so that the crawler ends are crossed to avoid the shock absorption, the front and rear inclined sides of the crawler wheelchair are reduced by half, and the shaking shock is reduced by half. The load of the single-side crawler belt end is not increased gradually along with the rising of the crawler belt end, and the load is lightened just opposite to the load, so that the single-side crawler belt end is not laborious to climb over the obstacle, and the single-side crawler belt end can be relaxed and powerful like driving on a flat road.

When the crawler wheelchair goes up a slope, as shown in fig. 15, the front ends of the right crawler assembly 4 and the left crawler assembly 5 are raised, the wheelchair presents a forward leaning state, and at the moment, two bidirectional compression shock absorbers 72 are compressed, so that the front ends of the right crawler assembly 4 and the left crawler assembly 5 are lifted up, the rear ends are attached to the ground, and the bidirectional compression ascending is smoother; on the contrary, the downward slope is as shown in fig. 14, so that the wheelchair crawler is tilted forwards and backwards, and the wheelchair crawler is buffered and damped, and does not generate great shaking and vibration.

When the center of gravity of the seat 1 is changed, as in case one of fig. 17: the center of gravity of the wheelchair is changed (without limitation to the situation) by integrally lifting the right end of the wheelchair, the seat 1 is driven by the transverse swinging balance seat frame 2 to slide on the seat longitudinal balance swinging transverse balance guide rail 3, and the center of gravity of the seat 1 is passively displaced and adjusted in a left-right sliding mode, so that rollover is avoided; and a second case: the front of the exemplary wheelchair is blocked (without limitation, the situation is not limited), at the moment, the seat 1 drives the transverse swinging balance seat frame 2 and the seat longitudinal balance swinging transverse balance guide rail 3 to swing back and forth relative to the chassis 6 of the vehicle body to passively displace and adjust the gravity center of the seat 1 due to inertia, so that rollover is avoided; when both conditions occur, the seat can swing back and forth and left and right to adjust the center of gravity. Under the passive displacement adjustment of the seat, the vertical horizon can be always kept to keep a balanced posture. The crawler wheelchair is fast to run, has certain flexibility, reduces consumption and damage caused by torsion, increases the endurance time and the service life of the crawler wheelchair, and improves the smooth safety and the quick passing capability of the crawler wheelchair in driving comfort.

According to the crawler wheelchair, the chassis 6 of the crawler wheelchair is connected to the rocker arm 71 through the two push-pull bidirectional compression shock absorbers 72, the two push-pull bidirectional compression shock absorbers 72 realize rapid running of the crawler wheelchair on uneven terrain, the wheelchair leans forward and backward, and the seat 1 can obtain front and back bidirectional buffering shock absorption; under the conversion action of the rocker arm 71, the two crawler belt ends are realized, the rotating shaft 68 is taken as a turning point, the change along with the change of the terrain can be driven, the rising and the falling are carried out when the rising and the falling are carried out, the shock absorption is carried out when the rising and the falling are carried out alternately, and the torsion is eliminated when the rising and the falling are carried out alternately; when the gravity center of the wheelchair is changed, the seat 1 can adjust the gravity center along with fluctuation of uneven terrain by matching the transverse rocking balance seat frame 2 with the longitudinal balance rocking transverse balance guide rail 3 to slide and rocking the longitudinal balance rocking transverse balance guide rail 3 on the chassis 6 of the vehicle body, so that the automatic cushioning and omnibearing balance of the wheelchair seat are realized, and the seat always maintains a vertical horizon balance posture.

The cushioning structure of the track wheelchair enables the track wheelchair to quickly drive on uneven terrain, and the seat can be subjected to forward tilting and backward tilting under the cushioning effect of the push-pull bidirectional compression cushioning device, so that the track wheelchair can be subjected to cushioning and vibration prevention, and large shaking vibration can not occur; the two crawler belt assemblies and the vehicle body chassis are connected to the rocker arm of the torsion eliminating and changing control assembly through two bidirectional compression shock absorbers, the crawler belt wheelchair rapidly runs on uneven terrain, under the conversion of the rocker arm, the two crawler belt pulleys can reversely twist around the middle rotating shaft to eliminate torsion, the crawler belt ends alternately lift up and down and meet the high and low level, the change along with the change of the terrain is realized, the cross avoidance and the shock absorption of the crawler belt ends are realized, the front and rear inclined sides of the crawler belt wheelchair are caused, and the inclined angle is reduced by half, so that the shaking shock is also reduced by half. Meanwhile, under the conversion of the rocker arm, the load can be passively converted with the fluctuation of the rugged ground, so that the single-side crawler belt end is lifted up by crossing the obstacle, the load can not be gradually increased along with the lifting of the crawler belt end, the load is lightened just opposite to the load, the single-side crawler belt end is lifted up by crossing the obstacle, the climbing is not laborious, and the single-side crawler belt can be relaxed and powerful like driving on a flat road.

The wheelchair runs on uneven terrain, the seat slides along the seat longitudinal balance swing transverse balance guide rail along with the transverse swing balance seat frame, and the seat longitudinal balance swing transverse balance guide rail swings on the chassis of the vehicle body under the adjustment of passive displacement, so that the wheelchair can always keep a balance posture of the seat vertical horizon in a mode of moving left and right and swinging front and back through the seat when running on uneven terrain, and rollover is avoided; the crawler wheelchair is fast to run, has certain flexibility, reduces consumption and damage caused by torsion, increases the endurance time and the service life of the crawler wheelchair, and improves the smooth safety and the quick passing capability of the crawler wheelchair in driving comfort.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.

In the description of this patent, it should be noted that, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "disposed" are to be construed broadly, and may be fixedly connected, disposed, detachably connected, disposed, or integrally connected, disposed, for example. The specific meaning of the terms in this patent will be understood by those of ordinary skill in the art as the case may be.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a number" is two or more, unless explicitly defined otherwise.

The technical scope of the present invention is not limited to the above description, and those skilled in the art may make various changes and modifications to the above-described embodiments without departing from the technical spirit of the present invention, and these changes and modifications should be included in the scope of the present invention.

Claims (8)

1. The utility model provides a track bradyseism structure which characterized in that:

The crawler belt comprises a right crawler belt assembly (4) and a left crawler belt assembly (5), wherein the right crawler belt assembly (4) and the left crawler belt assembly (5) are connected through a vehicle body chassis (6); the vehicle body chassis (6) comprises a protective frame (61), a connecting shaft (62), a vertical rod (64), an overhanging frame (67) and a rotating shaft (68), wherein a right crawler assembly (4) and a left crawler assembly (5) are respectively arranged at two ends of the connecting shaft (62), and the top end of the connecting shaft (62) is rotatably connected with the protective frame (61); an overhanging frame (67) is fixed on the side part of the protective frame (61); a rotating shaft (68) is arranged at the top end of the outer extending frame (67), and two vertical rods (64) are fixed at the side part of the connecting shaft (62);

The side of automobile body chassis (6) is equipped with and disappears twists reverse control unit (7), it trades control unit (7) including rocking arm (71) and two-way compression shock absorber (72) to disappear twists reverse, the center department of rocking arm (71) with rotation axis (68) rotate and be connected, just the both ends of rocking arm (71) rotate through two-way compression shock absorber (72) respectively and are connected with two montants (64).

2. The track cushioning structure of claim 1, wherein: the bidirectional compression shock absorber (72) comprises a connector (721), an outer sleeve (722), an inner insertion cylinder (723), a spring (724) and a locking rod (725); the inner inserting cylinder (723) is inserted into and slidingly connected with the outer sleeve (722), two sides of the inner inserting cylinder (723) and two sides of the outer sleeve (722) are respectively provided with mutually matched sliding grooves, two locking rods (725) are respectively inserted into the mutually matched sliding grooves, one locking rod (725) is fixed with the inner inserting cylinder (723), the other locking rod (725) is fixed with the outer sleeve (722), and the two locking rods (725) are connected through a spring (724); both ends of the outer sleeve (722) and the inner insertion barrel (723) are respectively fixed with a connector (721), wherein one connector (721) is connected with the rocker arm (71) at the other end, and the other connector (721) is connected with the vertical rod (64).

3. The track cushioning structure of claim 2, wherein: the vehicle body chassis (6) further comprises a reinforcing beam (63), a supporting beam (65), a longitudinal beam (66) and a back rod (69); the protective frame (61) adopts a 'mouth' -shaped structure, and a reinforcing beam (63) is arranged in the protective frame (61); support beams (65) are fixed on two sides of the protective frame (61), and the two support beams (65) are connected through a back rod (69); the back bar (69) and the overhanging frame (67) are fixed through a longitudinal beam (66).

4. A track wheelchair, characterized in that: comprising a cushioning structure according to any one of claims 1-3, a seat longitudinal balance rocking transverse balance guide (3), a transverse rocking balance seat frame (2), a protective frame (8) and a seat (1); the top end of the vehicle body chassis (6) is rotationally connected with a seat longitudinal balance swing transverse balance guide rail (3), and the seat longitudinal balance swing transverse balance guide rail (3) is slidingly connected with the transverse swing balance seat frame (2); the top end of the transverse swinging balance seat frame (2) is provided with a seat (1); the side part of the vehicle body chassis (6) is fixed with a protective frame (8).

5. A track wheelchair in accordance with claim 4, wherein: the seat longitudinal balance swinging transverse balance guide rail (3) comprises a guide rail body (31) and a mounting frame (32), wherein the cross section of the guide rail body (31) adopts a U-shaped structure, and the mounting frames (32) are fixed at two ends of the guide rail body (31); the mounting frame (32) is rotatably connected with the back rod (69) through a pin shaft.

6. A track wheelchair in accordance with claim 4, wherein: the transverse swinging balance seat frame (2) comprises pedals (21), a placing frame (22), pulleys (23), inclined plates (24), side protection beams (25), cross beams (26), connecting beams (27) and an outer frame (28); the seat (1) is arranged at the top end of the outer frame (28), side protection beams (25) are fixed on two sides of the outer frame (28), and a cross beam (26) is fixed between the two side protection beams (25); two connecting beams (27) are fixed between the outer frames (28), and the bottom ends of the outer frames (28) are connected with a placing frame (22); a pedal (21) is fixed at the end part of the placing frame (22); two groups of outwards inclined installation components are fixed at the bottom end of each cross beam (26), and each group of installation components comprises two inclined plates (24) which are oppositely arranged; two pulleys (23) are rotatably connected between the two sloping plates (24); the seat longitudinal balance swing transverse balance guide rail (3) penetrates through and is connected with the two pulleys (23) in a sliding mode.

7. A track wheelchair in accordance with claim 6, wherein: the cross sections of the outer frame (28) and the side protection beams (25) are of U-shaped structures, and the cross section of the placement frame (22) is of L-shaped structures; the corners of the transverse swinging balance seat frame (2) are chamfered.

8. A track wheelchair in accordance with claim 4, wherein: the protection frame (8) comprises a vertical rod (81), an inclined stay rod (82), a cross rod (83) and a fixed rod (84); two vertical rods (81) are arranged, the two vertical rods (81) are connected through a cross rod (83), a fixing rod (84) is fixed on the side part of the bottom end of each vertical rod (81), and the fixing rod (84) is fixed with the outward extending frame (67); inclined stay bars (82) are fixed on the side parts of the vertical rods (81), and the inclined stay bars (82) are fixed with the longitudinal beams (66); the vertical rod (81) adopts a structure that the bottom end is vertical and the top end is bent.