阅读说明：本技术 一种拖拉机底盘 (Tractor chassis ) 是由 毛培光 于 2020-12-25 设计创作，主要内容包括：本申请涉及一种拖拉机底盘,涉及拖拉机的领域,其包括底盘基体,底盘基体上沿其长度方向设置有多组车轮,每组车轮均设置有两个且对称设置在底盘基体长度方向的两侧,底盘基体与每组车轮之间均设置有第一调节装置,第一调节装置包括第一驱动组件以及对称设置在底盘基体长度方向两侧的两个第一滑动块、第一连接杆和第二连接杆,第一滑动块与底盘基体沿竖直方向滑动连接,两个第一滑动块分别与两个车轮连接,第一连接杆的一端与第一滑动块铰接,第二连接杆的一端与第一连接杆铰接,另一端与底盘基体铰接,第一驱动组件与第一连接杆连接,并用于驱动两个第二连接杆绕相反的方向转动。本申请具有实现对拖拉机底盘高度的调节作用的效果。(The application relates to a tractor chassis, which relates to the field of tractors and comprises a chassis base body, wherein a plurality of groups of wheels are arranged on the chassis base body along the length direction of the chassis base body, each group of wheels is provided with two wheels which are symmetrically arranged at two sides of the length direction of the chassis base body, a first adjusting device is arranged between the chassis base body and each group of wheels and comprises a first driving component and two first sliding blocks which are symmetrically arranged at two sides of the length direction of the chassis base body, the first sliding blocks are connected with the chassis base body in a sliding mode in the vertical direction, the two first sliding blocks are connected with the two wheels respectively, one end of each first connecting rod is hinged to the corresponding first sliding block, one end of each second connecting rod is hinged to the corresponding first connecting rod, the other end of each second connecting rod is hinged to the chassis base body, and each first driving assembly is connected with the corresponding first connecting rod and used for driving the two second connecting rods to rotate around the opposite direction. This application has the effect of the regulation effect of realization to tractor chassis height.)

1. The utility model provides a tractor chassis, includes chassis base member (1), is provided with multiunit wheel (2) along its length direction on chassis base member (1), and every group wheel (2) all is provided with two and the symmetry sets up in chassis base member (1) length direction's both sides, its characterized in that: a first adjusting device (3) is arranged between the chassis base body (1) and each group of wheels (2), the first adjusting device (3) comprises a first driving component (31) and two first sliding blocks (32) which are symmetrically arranged at two sides of the chassis base body (1) in the length direction, the wheel-mounted chassis comprises a first connecting rod (33) and a second connecting rod (34), wherein the first sliding block (32) is connected with a chassis base body (1) in a sliding mode along the vertical direction, the two first sliding blocks (32) are respectively connected with two wheels (2), one end of the first connecting rod (33) is hinged to the first sliding block (32), one end of the second connecting rod (34) is hinged to the first connecting rod (33), the other end of the second connecting rod is hinged to the chassis base body (1), and a first driving assembly (31) is connected with the first connecting rod (33) and used for driving the two second connecting rods (34) to rotate around opposite directions.

2. A tractor chassis according to claim 1, wherein: the first driving assembly (31) comprises a first driving piece, a first driving rod (312), two first worms (313) and two first worm wheels (314), wherein the two first worms (313) and the two first worm wheels (314) are symmetrically arranged on two sides of the chassis base body (1), the length direction of the first driving rod (312) is the same as the width direction of the chassis base body (1), the first driving rod (312) is rotatably connected with the chassis base body (1), the first driving piece is fixedly arranged on the chassis base body (1) and fixedly connected with the first driving rod (312), the two first worms (313) are coaxially and fixedly connected with the first driving rod (312), the rotating directions of the two first worms (313) are opposite, the two first worm wheels (314) are respectively coaxially and fixedly connected with hinge shafts, close to one end of the chassis, of the two second connecting rods (34), and the first worm wheels (314) are respectively matched with the two first worm wheels (314).

3. A tractor chassis according to claim 1, wherein: first adjusting device (3) still include two second sliding blocks (36) that the symmetry set up in chassis base member (1) length direction both sides, second sliding block (36) and chassis base member (1) along the width direction sliding connection of chassis base member (1) to it is articulated with the one end that first sliding block (32) are kept away from in head rod (33).

4. A tractor chassis according to claim 3, wherein: the first adjusting device (3) further comprises two third connecting rods (35) which are symmetrically arranged on two sides of the length direction of the chassis base body (1) and are parallel to the first connecting rods (33), one end of each third connecting rod (35) is hinged to the first sliding block (32), and the other end of each third connecting rod is hinged to the second sliding block (36).

5. A tractor chassis according to claim 1, wherein: all be provided with second adjusting device (4) between chassis base member (1) and every group wheel (2), second adjusting device (4) include second drive assembly (41) and symmetry set up two gears (42) and rack (43) in chassis base member (1) length direction both sides, the length direction of rack (43) is the same with the width direction of chassis base member (1), and respectively with two first sliding block (32) along the length direction sliding connection of rack (43), two rack (43) respectively with two wheel (2) fixed connection, gear (42) and first sliding block (32) rotate and be connected, and mesh with rack (43), second drive assembly (41) are connected with two gears (42), and be used for driving two gears (42) and rotate around opposite direction.

6. A tractor chassis according to claim 5, wherein: the second driving assembly (41) comprises a second driving piece, a second driving rod (412), two second worms (413) and two second worm wheels (414) which are symmetrically arranged on two sides of the length direction of the chassis base body (1), the length direction of the second driving rod (412) is the same as the width direction of the chassis base body (1), the second driving rod (412) is rotatably connected with the first sliding block (32), the second driving piece is fixedly arranged on the first sliding block (32) and fixedly connected with the second driving rod (412), the rotating directions of the two second worms (413) are opposite, the fixing sleeves (52) are respectively arranged on the second driving rod (412), and the two second worm wheels (414) are respectively and fixedly connected with the two gears (42) in a coaxial mode and are respectively matched with the two second worms (413) for use.

7. A tractor chassis according to claim 2, wherein: the first worm (313) is rotatably connected with a first driving rod (312), and a control device (5) used for fixing the first worm (313) on the first driving rod (312) is arranged between the first worm (313) and the first driving rod (312).

8. A tractor chassis according to claim 7, wherein: the control device (5) comprises a connecting sleeve (51), a fixing sleeve (52), a clamping assembly (53) and a third driving piece, wherein a first worm (313) is rotatably connected with a first driving rod (312), the fixing sleeve (52) is fixedly arranged on the first worm (313), the connecting sleeve (51) is slidably connected with the first driving rod (312) along the axis direction of the connecting sleeve, the clamping assembly (53) is arranged between the fixing sleeve (52) and the connecting sleeve (51), and the third driving piece is fixedly arranged on the chassis base body (1) and used for driving the connecting sleeve (51) to slide along the axis direction of the first driving rod (312).

9. A tractor chassis according to claim 8, wherein: the clamping assembly (53) comprises a clamping groove (531) formed in the connecting sleeve (51) and a clamping block (532) fixedly arranged on the fixing sleeve (52), and the clamping block (532) is matched with the clamping groove (531) for use.

10. A tractor chassis according to claim 8, wherein: the connecting sleeve (51) is coaxially sleeved on the first driving rod (312), an annular control groove (511) is formed in the circumferential direction of the connecting sleeve (51), the control device (5) further comprises a control rod (54) fixedly arranged on the third driving piece, and one end of the control rod (54) is located in the control groove (511).

Technical Field

The application relates to the field of tractors, in particular to a tractor chassis.

Background

The tractor is a self-propelled power machine used for towing and driving the operation machinery to complete various movable operations, and can also be used as fixed operation power. The tractor consists of three parts, namely an engine, a chassis and electrical equipment. The chassis is a device for transmitting power of the tractor, and the chassis is used for transmitting the power of the engine to the driving wheels and the working device to drive the tractor to run and finish moving operation or fixing operation.

The prior Chinese patent with reference to publication No. CN103587414B discloses a front transmission box chain transmission full-drive tractor chassis, which comprises a gearbox and a support arranged on the gearbox, wherein a main shaft, an intermediate shaft and an auxiliary shaft are arranged in the gearbox, a diesel engine, a belt pulley, a front transmission box, a steering device and a rear transmission box are arranged on the support, a front chain wheel is arranged on the front transmission box, a rear chain wheel is arranged on the rear transmission box, and the front chain wheel is connected with the rear chain wheel through a chain. The power transmitted by the gear box drives the rear transmission box by the front chain wheel through the chain and the rear chain wheel, and the rear wheel and the front wheel rotate simultaneously.

In view of the above-mentioned related technologies, the inventor believes that a tractor often needs to cross obstacles with different heights in the use process, and the height of the tractor chassis is a fixed height, which cannot adjust the height of the tractor chassis, and causes inconvenience to the use process of the tractor.

Disclosure of Invention

In order to realize the adjusting function of the tractor chassis height and enable the use process of the tractor to be more convenient, the application provides a tractor chassis.

The application provides a tractor chassis adopts following technical scheme:

the utility model provides a tractor chassis, including the chassis base member, be provided with the multiunit wheel along its length direction on the chassis base member, every group wheel all is provided with two and the symmetry sets up the both sides at chassis base member length direction, all be provided with first adjusting device between chassis base member and every group wheel, first adjusting device includes that first drive assembly and symmetry set up two first sliding blocks in chassis base member length direction both sides, head rod and second connecting rod, vertical direction sliding connection is followed with the chassis base member to first sliding block, two first sliding blocks are connected with two wheels respectively, the one end of head rod is articulated with first sliding block, the one end and the head rod of second connecting rod are articulated, the other end is articulated with the chassis base member, first drive assembly is connected with the head rod, and be used for driving two second connecting rods and rotate around opposite direction.

Through adopting above-mentioned technical scheme, when the chassis height of tractor needs to be adjusted, make two second connecting rods of first drive assembly drive rotate around opposite direction on the chassis base member, the second connecting rod can drive the one end that the head rod is close to the second connecting rod and rotate thereupon this moment, and make two head rods drive two first sliding blocks and slide along vertical direction simultaneously on the chassis base member under the restriction of head rod length, two wheels that drive chassis base member both sides simultaneously remove along vertical direction, the vertical distance of chassis base member and wheel bottom changes this moment, thereby realize the regulating action to tractor chassis height, the applicable situation of tractor has been enlarged, the use that makes the tractor is more convenient.

Optionally, the first driving assembly comprises a first driving piece, a first driving rod and two first worms and first worm wheels symmetrically arranged on two sides of the chassis base body, the length direction of the first driving rod is the same as the width direction of the chassis base body, the first driving rod is rotatably connected with the chassis base body, the first driving piece is fixedly arranged on the chassis base body and fixedly connected with the first driving rod, the two first worms are all fixedly connected with the first driving rod in a coaxial mode, the rotating directions of the two first worms are opposite, the two first worm wheels are fixedly connected with the two second connecting rods in a coaxial mode, close to the hinge shaft at one end of the chassis, and the first worm wheels are matched with the two first worm wheels for use.

Through adopting above-mentioned technical scheme, when adjusting the chassis height of tractor, first driving piece drives first actuating lever and rotates on the chassis base member to drive two simultaneously and revolve to opposite first worms and rotate along with first actuating lever, because two first worm wheels use with two first worms cooperation respectively, two first worms can drive two first worm wheels simultaneously and rotate around opposite direction on the chassis base member, and then make two first worm wheels drive two second connecting rods simultaneously and rotate around opposite direction on the chassis base member, realize the drive effect to second connecting rod rotation process.

Optionally, the first adjusting device further comprises two second sliding blocks symmetrically arranged on two sides of the length direction of the chassis base body, and the second sliding blocks are connected with the chassis base body in a sliding manner along the width direction of the chassis base body and hinged with one end, far away from the first sliding block, of the first connecting rod.

Through adopting above-mentioned technical scheme, when the second connecting rod rotates on the chassis base member, the second connecting rod can drive the articulated department of head rod and second connecting rod and rotate thereupon, the position at head rod both ends all can change this moment, the head rod can rotate between first sliding block and second sliding block, and drive first sliding block and slide along vertical direction on the chassis base member, it slides along the width direction of chassis base member to drive the second sliding block simultaneously on the chassis base member, thereby the slip process to first sliding block plays limiting displacement, make the slip process of first sliding block more stable.

Optionally, the first adjusting device further comprises two third connecting rods which are symmetrically arranged on two sides of the length direction of the chassis base body and are parallel to the first connecting rods respectively, one end of each third connecting rod is hinged to the first sliding block, and the other end of each third connecting rod is hinged to the second sliding block.

Through adopting above-mentioned technical scheme, when the second connecting rod drives the head rod and rotates between first sliding block and second sliding block, because third connecting rod and head rod parallel arrangement are between first sliding block and second sliding block, make the head rod, the third connecting rod, form parallelogram structure between first sliding block and the second sliding block, the head rod can drive the third connecting rod and do the rotation of same orbit thereupon between first sliding block and second sliding block this moment, thereby further play limiting displacement to the slip process of first sliding block, the stability of first sliding block slip process on the chassis base member has been strengthened.

Optionally, a second adjusting device is arranged between the chassis base body and each group of wheels, the second adjusting device comprises a second driving assembly, two gears and two racks, the two gears and the two racks are symmetrically arranged on two sides of the length direction of the chassis base body, the length direction of the racks is the same as the width direction of the chassis base body and are respectively in sliding connection with the two first sliding blocks along the length direction of the racks, the two racks are respectively fixedly connected with the two wheels, the gears are rotatably connected with the first sliding blocks and are meshed with the racks, and the second driving assembly is connected with the two gears and is used for driving the two gears to rotate around opposite directions.

Through adopting above-mentioned technical scheme, during the use, second drive assembly can drive two gears and rotate around opposite direction on the chassis base member, because gear and rack meshing, two gears can drive two racks and be close to each other or keep away from each other along the width direction of chassis base member on two first sliding blocks respectively, and drive two wheels and be close to each other or keep away from each other along the width direction of chassis base member, thereby realize the regulating action of distance between two wheels that are located chassis base member both sides to every group, the application situation of tractor use has been enlarged, the use that makes the tractor is more convenient.

Optionally, the second driving assembly comprises a second driving piece, a second driving rod and two second worms and second worm wheels which are symmetrically arranged on two sides of the length direction of the chassis base body, the length direction of the second driving rod is the same as the width direction of the chassis base body, the second driving rod is rotatably connected with the first sliding block, the second driving piece is fixedly arranged on the first sliding block and is fixedly connected with the second driving rod, the rotating directions of the two second worms are opposite, the two second worm wheels are fixedly sleeved on the second driving rod, and the two second worm wheels are respectively and fixedly connected with the two gears in a coaxial mode and are respectively matched with the two second worms for use.

Through adopting above-mentioned technical scheme, when the wheel interval of needs to tractor both sides is adjusted, the second driving piece drives the second actuating lever and rotates, the second actuating lever can drive two simultaneously and revolve to opposite second worms and rotate, because two second worms use with two second worm wheel cooperations respectively, two second worms can drive two second worm wheels and rotate around opposite direction simultaneously, and drive two gears and rotate around opposite direction simultaneously on the chassis base member, thereby make two racks drive two wheels of two chassis base member both sides simultaneously and be close to each other or keep away from each other, realize the accommodation process to two wheel intervals of chassis base member both sides, the interval accommodation process of two wheels of messenger's chassis base member both sides is more convenient.

Optionally, the first worm is rotatably connected to the first driving rod, and a control device for fixing the first worm to the first driving rod is disposed between the first worm and the first driving rod.

By adopting the technical scheme, when the tractor chassis height adjusting device is used, after the control device fixes the first worm on the first driving rod, the first driving rod can drive the first worm to rotate, so that the first worm drives the first worm wheel and the second connecting rod to rotate, and the driving effect on the tractor chassis height adjusting process is realized. When the height of the two sides of the width direction of the tractor chassis is not required to be adjusted at the same time, the first worm and the first driving rod can be prevented from being fixed relatively through the control device, the first worm is rotatably connected with the first driving rod at the moment, and the first worm cannot rotate along with the rotation of the first driving rod, so that the first adjusting device can independently adjust the height of the two sides of the width direction of the tractor chassis, and the tractor is more convenient to use.

Optionally, the control device includes a connection sleeve, a fixed sleeve, a clamping assembly and a third driving element, the first worm is rotatably connected with the first driving rod, the fixed sleeve is fixedly arranged on the first worm, the connection sleeve is slidably connected with the first driving rod along the axis direction of the connection sleeve, the clamping assembly is arranged between the fixed sleeve and the connection sleeve, and the third driving element is fixedly arranged on the chassis base body and used for driving the connection sleeve to slide along the axis direction of the first driving rod.

Through adopting above-mentioned technical scheme, during the use, the axis direction of third driving piece drive adapter sleeve along first actuating lever slides towards the one end that is close to fixed cover, makes adapter sleeve and fixed cover joint, and when first actuating lever rotated, first actuating lever can drive fixed cover and adapter sleeve and rotate simultaneously to make fixed cover drive first worm rotate, thereby realize the relative fixed process of first worm and first actuating lever.

When the height of tractor chassis width direction both sides was adjusted alone to needs, the axis direction of third driving piece drive adapter sleeve along first actuating lever was towards the one end slip of keeping away from fixed cover, made adapter sleeve and fixed cover separation, when first actuating lever rotated, fixed cover and first worm can not rotate along with first actuating lever to make the tractor can carry out the independent control to the height of chassis width direction both sides, make the use of tractor more convenient.

Optionally, the clamping assembly comprises a clamping groove formed in the connecting sleeve and a clamping block fixedly arranged on the fixing sleeve, and the clamping block is matched with the clamping groove.

Through adopting above-mentioned technical scheme, when third driving piece drive adapter sleeve moved to the one side that is close to fixed cover, the fixture block on the fixed cover was close to the draw-in groove gradually to make the fixture block insert and establish in the draw-in groove, realize fixed cover and the joint effect of removing the cover, be convenient for remove the cover and drive fixed cover and rotate simultaneously.

Optionally, the connecting sleeve is coaxially sleeved on the first driving rod, an annular control groove is formed in the circumferential direction of the connecting sleeve, the control device further comprises a control rod fixedly arranged on the third driving piece, and one end of the control rod is located in the control groove.

Through adopting above-mentioned technical scheme, because the one end of control lever is located the control flume, when the third driving piece drive control lever removed along the axis direction of first actuating lever, the one end that the control lever was inserted and is established at the control flume can promote the connecting sleeve and slide along the axis direction of first actuating lever on the first actuating lever to the realization is to the drive effect of adapter sleeve removal process.

In summary, the present application includes at least one of the following beneficial technical effects:

by arranging the first adjusting device, the vertical distance between the chassis base body and the bottom of the wheel can be changed, the adjusting effect on the chassis height of the tractor is realized, and the use process of the tractor is more convenient;

by arranging the second adjusting device, the two wheels on the two sides of the chassis base body can be close to or far away from each other, so that the adjusting effect on the distance between the two wheels is realized, and the application condition of the tractor in the using process is enlarged;

through setting up controlling means, make first adjusting device can adjust alone the height of tractor chassis width direction both sides alone, further enlarged the applicable situation of tractor, make the use of tractor more convenient.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present application;

FIG. 2 is a schematic view of a partial structure intended to show a first adjustment device;

fig. 3 is a schematic view of a partial structure intended to show a control device;

fig. 4 is a partial structural schematic view intended to show the second adjustment device.

Description of reference numerals: 1. a chassis base; 11. a fixed beam; 111. a first chute; 12. fixing a column; 121. a second chute; 2. a wheel; 3. a first adjusting device; 31. a first drive assembly; 311. a first drive motor; 312. a first drive lever; 3121. a third chute; 313. a first worm; 314. a first worm gear; 32. a first slider; 321. a fourth chute; 33. a first connecting rod; 34. a second connecting rod; 35. a third connecting rod; 36. a second slider; 4. a second adjustment device; 41. a second drive assembly; 411. a second drive motor; 412. a second drive lever; 413. a second worm; 414. a second worm gear; 42. a gear; 43. a rack; 431. a slide bar; 5. a control device; 51. connecting sleeves; 511. a control slot; 512. a slider; 52. fixing a sleeve; 53. a clamping assembly; 531. a card slot; 532. a clamping block; 54. a control lever; 55. the cylinder is driven.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

The embodiment of the application discloses a tractor chassis. Referring to fig. 1, a tractor chassis includes chassis base member 1, be provided with two sets of wheels 2 along its length direction on the chassis base member 1, every group wheel 2 all is provided with two, and two wheels 2 symmetries of every group set up the both sides at chassis base member 1 length direction, all be provided with between chassis base member 1 and every group wheel 2 and be used for adjusting chassis base member 1 and the first adjusting device 3 of 2 relative heights of wheel, all be provided with between two wheels 2 of every group and be used for adjusting the second adjusting device 4 of 2 intervals of two wheels, thereby make the tractor can be applicable to different situations, make the use of tractor more convenient.

Referring to fig. 1, two horizontal fixed beams 11 are fixedly arranged on the bottom surface of a chassis base body 1, the length direction of the fixed beams 11 is perpendicular to the length direction of the chassis base body 1, and the fixed beams 11 are arranged in one-to-one correspondence with each group of wheels 2. The bottom at 11 both ends of fixed beam all fixedly is provided with vertical fixed column 12, and two wheels 2 of every group are connected with two fixed columns 12 respectively.

Referring to fig. 2, for the first adjusting device 3 between two wheels 2 of each group, the first adjusting device 3 includes two first driving assemblies 31, two first sliding blocks 32, two first connecting rods 33, two second connecting rods 34, two third connecting rods 35 and two second sliding blocks 36, the two first sliding blocks 32, the two first connecting rods 33, the two second connecting rods 34, the two third connecting rods 35 and the two second sliding blocks 36 are all symmetrically arranged on two sides of the chassis base body 1 in the length direction, the fixed beam 11 is provided with two horizontal first sliding grooves 111, the cross sections of the first sliding grooves 111 are T-shaped, and one sides of the two second sliding blocks 36 are respectively located in the two first sliding grooves 111 and are in sliding connection with the first sliding grooves 111; a vertical second sliding chute 121 is formed in the fixed column 12, the section of the second sliding chute 121 is in a T shape, the first sliding block 32 and the second sliding block 36 are located in the same vertical plane, one side of each of the two first sliding blocks 32 is located in the second sliding chute 121 on the two fixed columns 12 respectively and is in sliding connection with the second sliding chute 121, and the two wheels 2 of each group are connected with the two first sliding blocks 32 respectively; the first connecting rod 33 and the third connecting rod 35 are arranged between the first sliding block 32 and the second sliding block 36 in parallel, the first connecting rod 33 and the third connecting rod 35 are both positioned on one side of the first sliding block 32 away from the fixed column 12, the length of the first connecting rod 33 is the same as that of the third connecting rod 35, the first connecting rod 33 and the third connecting rod 35 are positioned in the same vertical plane and are obliquely arranged, the first connecting rod 33 is positioned below the third connecting rod 35, the top ends of the first connecting rod 33 and the third connecting rod 35 are both hinged with the second sliding block 36, the bottom ends of the first connecting rod 33 and the third connecting rod 35 are both hinged with the first sliding block 32, and a parallelogram is formed among the first connecting rod 33, the first sliding block 32, the third connecting rod 35 and the second sliding block 36; the second connecting rod 34 is obliquely arranged in a vertical plane and is positioned on one side, close to the fixed beam 11, of the first connecting rod 33, the top end of the second connecting rod 34 is hinged with the fixed beam 11, and the bottom end of the second connecting rod 34 is hinged with the middle part of the first connecting rod 33; the first driving assembly 31 is disposed on the fixed beam 11 and connected to the top end of the second connecting rod 34.

Referring to fig. 2, the first driving assembly 31 includes a first driving member, which is a first driving motor 311, a first driving rod 312, a first worm 313 and a first worm wheel 314, the first driving motor 311 being fixedly disposed at one end of the fixed beam 11; the first driving rod 312 is horizontally arranged on one side of the fixed beam 11, the length direction of the first driving rod 312 is the same as that of the fixed beam 11, the first driving rod 312 is rotatably connected with the fixed beam 11, and an output shaft of the first driving motor 311 is coaxially and fixedly connected with one end of the first driving rod 312; the number of the first worm 313 and the first worm wheel 314 is two, and the two first worm 313 and the first worm wheel 314 are symmetrically arranged on two sides of the chassis base body 1 in the length direction, the two first worm 313 are coaxially sleeved on the first driving rod 312, and the rotation directions of the two first worm 313 are opposite; the two first worm gears 314 are respectively and coaxially and fixedly connected with the hinge shafts of the two second connecting rods 34 close to the fixed beam 11, and the two first worm gears 314 are respectively matched with the two first worms 313 for use.

When the chassis height of the tractor needs to be adjusted, the first driving rod 312 drives the first driving rod 312 to rotate on the fixed beam 11 by the motor, the first driving rod 312 drives the two first worms 313 to rotate around opposite directions simultaneously, and drives the two first worm gears 314 to rotate around opposite directions simultaneously, the two first worm gears 314 drive the two second connecting rods 34 to rotate around opposite directions on the fixed beam 11 respectively, at this time, the second connecting rods 34 drive the first connecting rods 33 and the third connecting rods 35 to move between the first sliding blocks 32 and the second sliding blocks 36 in the same track, so that the second sliding blocks 36 horizontally move in the first sliding grooves 111, the first sliding blocks 32 vertically slide in the second sliding grooves 121, and the first sliding blocks 32 drive the two wheels 2 of each group to move in the vertical direction, thereby adjusting the relative height of the chassis base body 1 and the wheels 2, the height of the chassis of the tractor can be adjusted, and the tractor is more convenient to use.

Referring to fig. 3, the first worm screws 313 are rotatably connected to the first driving rods 312, and the control devices 5 are disposed between the two first worm screws 313 and the first driving rods 312. The control device 5 comprises a connecting sleeve 51, a fixing sleeve 52, a clamping component 53, a control rod 54 and a third driving piece, the fixing sleeve 52 is coaxially sleeved on the first driving rod 312 and is rotatably connected with the first driving rod 312, and the fixing sleeve 52 is fixedly arranged at one end of each of the two first worms 313, which is far away from each other; the connecting sleeve 51 is coaxially sleeved on the first driving rod 312, the connecting sleeve 51 is positioned at one end of the fixing sleeve 52 far away from the first worm 313, a third sliding groove 3121 is formed in the first driving rod 312 along the length direction of the first driving rod, a sliding block 512 is slidably connected in the third sliding groove 3121, and the sliding block 512 is fixedly connected with the connecting sleeve 51; the clamping assembly 53 comprises a plurality of clamping grooves 531 and clamping blocks 532, the clamping grooves 531 and the clamping blocks 532 are arranged in a one-to-one correspondence manner, the clamping grooves 531 are formed in the end face, close to the fixing sleeve 52, of the connecting sleeve 51, the clamping blocks 532 are fixedly connected with one end, close to the connecting sleeve 51, of the fixing sleeve 52, and the clamping blocks 532 are matched with the clamping grooves 531 for use; the third driving rod is a driving cylinder 55, the driving cylinder 55 is fixedly arranged on the fixed beam 11 and is positioned at one end of the connecting sleeve 51 far away from the fixed sleeve 52, and the length direction of the driving cylinder 55 is the same as that of the first driving rod 312; an annular control groove 511 is formed in the circumferential surface of the connecting sleeve 51, one end of the control rod 54 is fixedly connected with the piston rod of the driving cylinder 55, and the other end of the control rod is located in the control groove 511.

When two wheels 2 on two sides of the chassis in the length direction need to be independently adjusted in the relative height of the chassis base body 1, the piston rod of the driving cylinder 55 contracts to drive the control rod 54 to move in the direction away from the fixing sleeve 52, the control rod 54 drives the connecting sleeve 51 to slide in the direction away from the fixing sleeve 52 on the first driving rod 312 and drive the sliding block 512 to slide in the sliding groove, and meanwhile, the clamping block 532 is pulled out from the clamping groove 531 to separate the connecting sleeve 51 from the fixing sleeve 52, at the moment, the first worm 313 cannot rotate along with the rotation of the first driving rod 312, so that the relative rotation and relative fixation of the first worm 313 and the first driving rod 312 can be controlled, the first adjusting device 3 can adjust the two wheels 2 simultaneously and can also independently adjust the two wheels 2, and the use process of the tractor is more convenient.

Referring to fig. 4, the second adjusting device 4 includes two second driving assemblies 41, a gear 42 and a rack 43 symmetrically disposed on two sides of the chassis base 1 in the length direction, the rack 43 is horizontally disposed, the length direction of the rack 43 is the same as the length direction of the fixed beam 11, two wheels 2 of each group are respectively fixedly connected to one end of the two racks 43 away from each other, the two racks 43 are respectively inserted into the two first sliding blocks 32, sliding strips 431 are fixedly disposed on two sides of the rack 43 in the length direction, the length direction of the sliding strips 431 is the same as the length direction of the rack 43, two fourth sliding slots 321 are disposed in the first sliding blocks 32, and the two sliding strips 431 are respectively inserted into the two fourth sliding slots 321 and are slidably connected to the fourth sliding slots 321; the gears 42 correspond to the racks 43 one by one, the gears 42 are positioned above the racks 43 and meshed with the racks 43, and the two gears 42 are respectively connected with the two first sliding blocks 32 in a rotating manner; two groups of second driving assemblies 41 are respectively arranged in one-to-one correspondence with the two gears 42, each second driving assembly 41 comprises a second driving piece, a second driving rod 412, a second worm 413 and a second worm wheel 414, the second driving piece is a second driving motor 411, and the second driving motor 411 is fixedly connected with the first sliding block 32; the length direction of the second driving rod 412 is the same as the length direction of the rack 43, the second driving rod 412 is rotatably connected with the first sliding block 32, and one end of the second driving rod 412 is coaxially and fixedly connected with the output shaft of the second driving motor 411; the second worm 413 is coaxially and fixedly connected with the second driving rod 412, and the rotation directions of the second worms 413 of the two groups of second driving assemblies 41 are opposite; the second worm wheel 414 is used in cooperation with the second worm 413, and the second worm wheels 414 of the two sets of second driving assemblies 41 are respectively and fixedly connected with the two gears 42 in a coaxial manner.

When the distance between two wheels 2 on two sides of the chassis needs to be adjusted, the second driving motor 411 drives the second driving rod 412 to rotate on the fixed beam 11, the second driving rod 412 can simultaneously drive the two second worms 413 to rotate around opposite directions, and drive the two second worm gears 414 to simultaneously rotate around opposite directions, the two second worm gears 414 can respectively drive the two gears 42 to respectively rotate around opposite directions, the two gears 42 can drive the two racks 43 to be close to or away from each other, the sliding strip 431 can slide in the fourth sliding groove 321, and simultaneously the two wheels 2 are driven to be close to and away from each other, so that the adjustment process of the distance between the two wheels 2 on two sides of the chassis is realized, and the using process of the tractor is more convenient.

The implementation principle of a tractor chassis of the embodiment of the application is as follows: when the chassis height of the tractor needs to be adjusted, the control device 5 makes the two first worm gears 314 and the first driving rod 312 relatively fixed, then the first driving rod 312 is driven by the motor to rotate on the fixed beam 11, the first driving rod 312 can simultaneously drive the two first worms 313, the first worm gears 314 and the second connecting rods 34 to rotate around opposite directions on the fixed beam 11, and drive the first sliding blocks 32 to vertically slide in the second sliding grooves 121, so that the first sliding blocks 32 drive the two wheels 2 of each group to move along the vertical direction, thereby realizing the adjustment process of the chassis height of the tractor, and making the use process of the tractor more convenient.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.