CN220096046U - Nut sleeve type double-wheel quick-dismantling structure and tractor - Google Patents

Abstract

The utility model provides a nut sleeve type double-wheel quick-dismantling structure and a tractor. The utility model provides a nut cover formula double round quick detach structure includes: the novel bicycle comprises a rear axle, a hub flange, a first inner wheel, a first outer wheel, a plurality of nut sleeves, a plurality of nuts, a plurality of bolts matched with the nuts, a pair of process screws and a pair of U-shaped grooves, wherein the hub flange is rotatably installed on the rear axle, the first inner wheel is installed on the hub flange, the plurality of nut sleeves are installed on the first inner wheel, the plurality of nuts are respectively and detachably installed in the plurality of nut sleeves, the pair of U-shaped grooves are formed in the first outer wheel, one ends of the plurality of bolts and one ends of the pair of process screws are installed in the plurality of nuts, the other ends of the pair of process screws are respectively installed in the pair of U-shaped grooves, and the other ends of the plurality of bolts are connected with the first outer wheel.

Description

Nut sleeve type double-wheel quick-dismantling structure and tractor

Technical Field

The utility model relates to the technical field of double-wheel installation of a rear driving shaft of a vehicle, in particular to a nut sleeve type double-wheel quick-dismantling structure and a tractor.

Background

The wheel tractor is used as a general power machine and mainly plays a role in providing power for machines. The utilization rate of the method is particularly high in field operation. In the market, two front wheels and two rear wheels are commonly adopted as a tractor. It is known that when a tractor works in a field, positive pressure is transmitted to the ground through tires, and meanwhile, the tractor requires high overall quality in order to ensure high traction force output, so that the tractor compacts soil and damages the soil aggregate structure under the condition of the tractor works in the field. The tractor works once in the field, so that the field can be maintained for a long time.

The pressure is proportional to the pressure and inversely proportional to the area, so increasing the contact area of the tire with the ground is a good measure for reducing the compaction of the ground, so that the number of tires can be properly increased. The increase of the number of the tires not only can effectively reduce the compaction of the tractor to the ground, but also can effectively increase the traction force of the tractor because of the fact that the maximum adhesion force of the soil to the vehicle is formed by two parts of the friction force provided by the soil and the adhesion force provided by the soil to the tires according to the mol-coulomb law, the adhesion force of the soil is the product of the grounding area of the wheels and the adhesion force of the soil to the unit area, the grounding area of the wheels of the whole tractor is increased, the traction force of the tractor can be effectively increased, and the double-wheel tractor is arranged on the rear driving shaft of the tractor, which is a main means for reducing the pressure of the high-horsepower tractor to the ground, and is an effective means for the current protective cultivation.

The prior art mainly adopts the structure as shown in fig. 8, and two hubs 25 can be mounted by lengthening the half shafts 24 on both sides of the bridge box 23. The second inner wheel 26 and the second outer wheel 27 are then mounted on the two hubs 25. However, this solution has the following drawbacks:

because the two half shafts 24 are longer, the overall width of the vehicle is increased, when single-wheel operation or transportation transition is adopted, the detected half shafts 24 become potential safety hazards, other things are easy to hook, and damage is caused to people or objects;

the second inner wheel 26 is difficult to disassemble, and when the second inner wheel 26 is disassembled for maintenance, the second outer wheel 27 and the hub 25 positioned at the outer side need to be disassembled at the same time, so that the maintenance convenience is poor.

In addition, in the prior art, due to the adoption of the structure of the bolt connection, the operation space is small at the inner side of the rear axle, two workers are needed to fix the nuts by using the wrench at the inner side of the tire when the outer wheel is installed, and one worker is needed to screw the bolts by using the wrench at the outer side of the tire, so that the number of operators is large, and the labor intensity is high. Another solution is to weld the nut directly to the web of the inner wheel, which has the disadvantage that the threads of the nut are easily damaged after several detachments and the nut is difficult to replace after welding.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a nut sleeve type double-wheel quick-dismantling structure and a tractor aiming at the defects of the prior art.

The technical scheme for solving the technical problems is as follows: a nut-sleeved double-wheel quick-dismantling structure, comprising: the novel bicycle comprises a rear axle, a hub flange, a first inner wheel, a first outer wheel, a plurality of nut sleeves, a plurality of nuts, a plurality of bolts matched with the nuts, a pair of process screws and a pair of U-shaped grooves, wherein the hub flange is rotatably installed on the rear axle, the first inner wheel is installed on the hub flange, the plurality of nut sleeves are installed on the first inner wheel, the plurality of nuts are respectively and detachably installed in the plurality of nut sleeves, the pair of U-shaped grooves are formed in the first outer wheel, one ends of the plurality of bolts and one ends of the pair of process screws are installed in the plurality of nuts, the other ends of the pair of process screws are respectively installed in the pair of U-shaped grooves, and the other ends of the plurality of bolts are connected with the first outer wheel.

The technical scheme of the utility model has the beneficial effects that: the inner wheel and the outer wheel are simply separated and can be quickly disassembled. The process screw rod is used as a guide sleeve, the outer wheel is aligned with the guide sleeve arranged on the inner wheel during installation, stable and reliable connection can be realized by arranging bolts, positioning is accurate during installation of the outer wheel, time and labor are saved, assembly performance is improved, and operation intensity is low. Through the scheme that sets up the nut cover, nut detachably installs in the nut cover, after the nut damages, can light dismantlement nut. The need for an outboard hub is eliminated, thereby reducing the use of lifting equipment. The outer wheel installation procedure is reduced, and the time for installing the wheels in field operation is greatly saved. The steering device can be used in the form of an extremely short half axle type rear axle or a flange type rear axle, the width of the whole vehicle is narrower under the condition of installing an outer wheel, the steering performance is good, and the steering device is safe and reliable when being transported on a road. The nut sleeve structure is adopted, when the bolt is screwed, a person is not required to position the nut on the other side of the tire, and the nut can be operated by a single person, so that the labor is saved.

Further, the nut is of an outer hexagonal structure, an inner hexagonal hole is formed in the nut sleeve, a threaded hole and a fastening screw are arranged on the outer side wall of the nut sleeve, a fastening hole is formed in the nut, the nut is installed in the nut sleeve, and one end of the fastening screw penetrates through the threaded hole and is connected with the fastening hole.

The beneficial effects of adopting the further technical scheme are as follows: the nut is installed in the interior hexagonal hole on the nut cover, has the screw hole that is used for installing the holding screw in the nut cover outside, has the holding hole that contacts with the holding screw head on the nut, and after the holding screw was screwed, holding screw head in close contact is in the holding hole, fastens the nut. Under the normal operating condition, the set screw fixes the nut in the nut sleeve, so that the nut can not be separated from the inner hexagonal hole, when the nut teeth are damaged, the set screw is screwed, at the moment, the nut can be separated from the inner hexagonal hole, and after the nut is replaced again, the nut is continuously fastened by the set screw, so that the replacement of the nut is completed. When the nut is damaged, the nut can be replaced by loosening the set screw, so that the maintainability is high.

Further, the first inner wheel includes: the inner rim is sleeved on the outer side of the inner rim, the first tire is sleeved on the outer side of the inner rim, one side of the inner rim is mounted on the hub flange, and a plurality of nut sleeves are mounted on the other side of the inner rim.

The beneficial effects of adopting the further technical scheme are as follows: through the scheme that sets up the nut cover, nut detachably installs in the nut cover, after the nut damages, can light dismantlement nut. The nut sleeve structure is adopted, when the bolt is screwed, a person is not required to position the nut on the other side of the tire, and the nut can be operated by a single person, so that the labor is saved.

Further, one side of the inner wheel web is mounted to the hub flange by a plurality of the hub bolts.

The beneficial effects of adopting the further technical scheme are as follows: through a plurality of hub bolted connection, can effective transmission moment of torsion, and stable in structure is reliable.

Further, the first outer wheel includes: the connecting sleeve comprises a second tire, an outer rim, a connecting sleeve and an outer wheel spoke plate, wherein the outer wheel spoke plate is arranged on one side of the connecting sleeve, the outer rim is sleeved on the other side of the connecting sleeve, the second tire is sleeved on the outer side of the outer rim, a pair of U-shaped grooves are formed in the outer wheel spoke plate, and the outer wheel spoke plate is in butt joint with the first inner wheel.

The beneficial effects of adopting the further technical scheme are as follows: when the agriculture requires double-wheel operation, the process screw rod is diagonally arranged in the nut sleeve on the inner wheel, and the U-shaped groove on the outer wheel is clamped on the process screw rod, so that the outer wheel can transversely slide on the process screw rod. After the outer wheel slides in place, the outer wheel is fixed on the inner wheel web plate on the inner wheel through bolts and gaskets. The inner wheel and the outer wheel are connected through the connecting sleeve, and an outer wheel hub does not need to be installed, so that the use of hoisting equipment is reduced. The outer wheel installation procedure is reduced, and the time for installing the wheels in field operation is greatly saved.

Further, a side of the connecting sleeve protrudes from a side of the second tire adjacent to the first inner wheel.

The beneficial effects of adopting the further technical scheme are as follows: one side of the connecting sleeve protrudes out of one side of the second tire adjacent to the first inner wheel, so that the outer wheel is convenient to install and maintain, other things are hung on the inner rim after the outer wheel is prevented from being disassembled, and damage to people or objects is prevented.

Further, the other ends of the plurality of bolts are connected to the outer wheel web.

The beneficial effects of adopting the further technical scheme are as follows: the bolts are connected, so that torque is effectively transmitted, and the structure is stable and reliable.

Further, the U-shaped groove is in clearance fit with the process screw.

The beneficial effects of adopting the further technical scheme are as follows: the axial positioning of the inner wheel and the outer wheel is realized, the quick connection is realized, the positioning is accurate, and the time and the labor are saved.

Further, gaskets are sleeved on the outer side walls of the nuts.

The beneficial effects of adopting the further technical scheme are as follows: after the outer wheel slides in place, the outer wheel is fixed on the inner wheel web plate on the inner wheel through bolts and gaskets. The arrangement of the gasket is convenient for the installation and maintenance of the nut, prevents the nut from wearing the inner rim, prevents the nut from rotating or falling off, and improves the stability and reliability.

In addition, the tractor comprises the nut sleeve type double-wheel quick-dismantling structure.

The technical scheme of the utility model has the beneficial effects that: the inner wheel and the outer wheel are simply separated and can be quickly disassembled. The process screw rod is used as a guide sleeve, the outer wheel is aligned with the guide sleeve arranged on the inner wheel during installation, stable and reliable connection can be realized by arranging bolts, positioning is accurate during installation of the outer wheel, time and labor are saved, assembly performance is improved, and operation intensity is low. Through the scheme that sets up the nut cover, nut detachably installs in the nut cover, after the nut damages, can light dismantlement nut. The need for an outboard hub is eliminated, thereby reducing the use of lifting equipment. The outer wheel installation procedure is reduced, and the time for installing the wheels in field operation is greatly saved. The steering device can be used in the form of an extremely short half axle type rear axle or a flange type rear axle, the width of the whole vehicle is narrower under the condition of installing an outer wheel, the steering performance is good, and the steering device is safe and reliable when being transported on a road. The nut sleeve structure is adopted, when the bolt is screwed, a person is not required to position the nut on the other side of the tire, and the nut can be operated by a single person, so that the labor is saved.

Additional aspects of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

Fig. 1 is a schematic structural diagram of a nut sleeve type double-wheel quick-release structure according to an embodiment of the present utility model.

Fig. 2 is a schematic structural diagram of an inner wheel according to an embodiment of the present utility model.

Fig. 3 is a schematic structural view of an inner wheel web according to an embodiment of the present utility model.

Fig. 4 is a schematic structural view of a nut sleeve according to an embodiment of the present utility model.

Fig. 5 is a schematic structural view of a nut according to an embodiment of the present utility model.

Fig. 6 is a schematic structural diagram of an outer wheel according to an embodiment of the present utility model.

Fig. 7 is a schematic view of the structure of fig. 6 taken along the section line.

Fig. 8 is a schematic view of a rear drive shaft mounted dual wheel construction in the prior art.

Reference numerals illustrate: 1. a rear axle; 2. a hub flange; 3. hub bolts; 4. a first inner wheel; 5. a gasket; 6. a bolt; 7. a first outer wheel; 8. a first tire; 9. an inner rim; 10. an inner wheel web; 11. a first through hole; 12. a second through hole; 13. a nut sleeve; 131. an inner hexagonal hole; 132. a threaded hole; 14. a nut; 141. tightly fixing the hole; 15. a set screw; 16. a connecting sleeve; 17. an outer wheel web; 18. a U-shaped groove; 19. an outer rim; 20. a third through hole; 21. a process screw; 22. a second tire; 23. a bridge box; 24. a half shaft; 25. a hub; 26. a second inner wheel; 27. and a second outer wheel.

Detailed Description

The principles and features of the present utility model are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the utility model and are not to be construed as limiting the scope of the utility model.

As shown in fig. 1 to 7, an embodiment of the present utility model provides a nut sleeve type double-wheel quick-release structure, including: the rear axle 1, the hub flange 2, the first inner wheel 4, the first outer wheel 7, a plurality of nut sleeves 13, a plurality of nuts 14, a plurality of bolts 6 matched with the nuts 14, a pair of process screws 21 and a pair of U-shaped grooves 18, wherein the hub flange 2 is rotatably installed on the rear axle 1, the first inner wheel 4 is installed on the hub flange 2, a plurality of nut sleeves 13 are installed on the first inner wheel 4, a plurality of nuts 14 are respectively and detachably installed in a plurality of nut sleeves 13, a pair of U-shaped grooves 18 are arranged on the first outer wheel 7, one ends of a plurality of the bolts 6 and one ends of a pair of the process screws 21 are installed in a plurality of the nuts 14, the other ends of a pair of the process screws 21 are respectively installed in a pair of the U-shaped grooves 18, and the other ends of a plurality of the bolts 6 are connected with the first outer wheel 7.

The technical scheme of the utility model has the beneficial effects that: the inner wheel and the outer wheel are simply separated and can be quickly disassembled. The process screw rod is used as a guide sleeve, the outer wheel is aligned with the guide sleeve arranged on the inner wheel during installation, stable and reliable connection can be realized by arranging bolts, positioning is accurate during installation of the outer wheel, time and labor are saved, assembly performance is improved, and operation intensity is low. Through the scheme that sets up the nut cover, nut detachably installs in the nut cover, after the nut damages, can light dismantlement nut. The need for an outboard hub is eliminated, thereby reducing the use of lifting equipment. The outer wheel installation procedure is reduced, and the time for installing the wheels in field operation is greatly saved. The steering device can be used in the form of an extremely short half axle type rear axle or a flange type rear axle, the width of the whole vehicle is narrower under the condition of installing an outer wheel, the steering performance is good, and the steering device is safe and reliable when being transported on a road. The nut sleeve structure is adopted, when the bolt is screwed, a person is not required to position the nut on the other side of the tire, and the nut can be operated by a single person, so that the labor is saved.

According to the double-tire mounting scheme, the inner wheel and the outer wheel are simply separated, and the double-tire mounting scheme can be quickly disassembled. And the action strength is effectively reduced, the outer wheel (the first outer wheel) is aligned with the guide sleeve (the process screw) arranged on the inner wheel (the first inner wheel) during installation, and the stable and reliable connection can be realized by installing the bolts, so that the operation strength is low. Through the scheme of welding the nut sleeve, after the nut is damaged, the nut can be easily disassembled.

The rear axle 1 is provided with a hub flange 2, hub bolts 3 are fixed on the periphery of the hub flange 2, and a first inner wheel 4 is arranged on the rear axle 1 through the hub bolts 3. The first outer wheel 7 is mounted on the first inner wheel 4 by means of the spacer 5 and the bolts 6, since the large tractor outer tire is relatively heavy, in this solution there is a process screw 21 for improved assembly.

As shown in fig. 1 to 7, further, the nut 14 has an outer hexagonal structure, an inner hexagonal hole is formed in the nut sleeve 13, a threaded hole 132 and a fastening screw 15 are formed on an outer side wall of the nut sleeve 13, a fastening hole 141 is formed on the nut 14, the nut 14 is installed in the nut sleeve 13, and one end of the fastening screw 15 penetrates through the threaded hole 132 and is connected with the fastening hole 141.

The beneficial effects of adopting the further technical scheme are as follows: the nut is installed in the interior hexagonal hole on the nut cover, has the screw hole that is used for installing the holding screw in the nut cover outside, has the holding hole that contacts with the holding screw head on the nut, and after the holding screw was screwed, holding screw head in close contact is in the holding hole, fastens the nut. Under the normal operating condition, the set screw fixes the nut in the nut sleeve, so that the nut can not be separated from the inner hexagonal hole, when the nut teeth are damaged, the set screw is screwed, at the moment, the nut can be separated from the inner hexagonal hole, and after the nut is replaced again, the nut is continuously fastened by the set screw, so that the replacement of the nut is completed. When the nut is damaged, the nut can be replaced by loosening the set screw, so that the maintainability is high.

As shown in fig. 1 to 7, further, the first inner wheel 4 includes: the inner wheel rim 9 is sleeved on the outer side of the inner wheel spoke 10, the first tire 8 is sleeved on the outer side of the inner wheel rim 9, one side of the inner wheel spoke 10 is mounted on the hub flange 2, and a plurality of nut sleeves 13 are mounted on the other side of the inner wheel spoke 10.

The beneficial effects of adopting the further technical scheme are as follows: through the scheme that sets up the nut cover, nut detachably installs in the nut cover, after the nut damages, can light dismantlement nut. The nut sleeve structure is adopted, when the bolt is screwed, a person is not required to position the nut on the other side of the tire, and the nut can be operated by a single person, so that the labor is saved.

Wherein, the first inner wheel 4 is by first tire 8 and interior rim assembly (interior rim), has interior web 10 on interior rim 9, has 10 first through-holes 11 that are used for installing on wheel hub flange 2 on the interior web 10, has second through-hole 12 in interior web 10 outside, and nut cover 13 and the concentric welding of second through-hole 12 are on interior web 10. The nut 14 is installed in the inner hexagonal hole 131 on the nut housing 13, a screw hole 132 for installing the set screw 15 is provided on the outer side of the nut housing 13, a tightening hole 141 contacting with the head of the set screw 15 is provided on the nut 14, and when the set screw 15 is screwed, the head of the set screw 15 closely contacts with the tightening hole 141 to fasten the nut 14.

In normal working state, the set screw 15 fixes the nut 14 in the nut sleeve 13, so that the nut 14 cannot be pulled out from the inner hexagonal hole 131, when the teeth of the nut 14 are damaged, the set screw 15 is loosened, at the moment, the nut 14 can be pulled out from the inner hexagonal hole 131, after the nut 14 is replaced again, the nut 14 is continuously fastened by the set screw 15, and the replacement of the nut 14 is completed.

As shown in fig. 1 to 7, further, one side of the inner hub plate 10 is mounted on the hub flange 2 by a plurality of the hub bolts 3.

The beneficial effects of adopting the further technical scheme are as follows: through a plurality of hub bolted connection, can effective transmission moment of torsion, and stable in structure is reliable.

As shown in fig. 1 to 7, further, the first outer wheel 7 includes: the second tire 22, the outer rim 19, the connecting sleeve 16 and the outer web 17, wherein the outer web 17 is mounted on one side of the connecting sleeve 16, the outer rim 19 is sleeved on the other side of the connecting sleeve 16, the second tire 22 is sleeved on the outer side of the outer rim 19, the pair of U-shaped grooves 18 are arranged on the outer web 17, and the outer web 17 is abutted with the first inner wheel 4.

The beneficial effects of adopting the further technical scheme are as follows: when the agriculture requires double-wheel operation, the process screw rod is diagonally arranged in the nut sleeve on the inner wheel, and the U-shaped groove on the outer wheel is clamped on the process screw rod, so that the outer wheel can transversely slide on the process screw rod. After the outer wheel slides in place, the outer wheel is fixed on the inner wheel web plate on the inner wheel through bolts and gaskets. The inner wheel and the outer wheel are connected through the connecting sleeve, and an outer wheel hub does not need to be installed, so that the use of hoisting equipment is reduced. The outer wheel installation procedure is reduced, and the time for installing the wheels in field operation is greatly saved.

The first outer wheel 7 is composed of a second tire 22 and an outer rim 19, a connecting sleeve 16 is welded on the outer rim 19, an outer wheel web 17 is welded on the end part of the connecting sleeve 16, and a U-shaped groove 18 and a third through hole 20 for being installed on the inner wheel web 10 are formed on the outer wheel web 17.

As shown in fig. 1 to 7, further, one side of the connecting sleeve 16 protrudes from the side of the second tyre 22 adjacent to the first inner wheel 4.

The beneficial effects of adopting the further technical scheme are as follows: one side of the connecting sleeve protrudes out of one side of the second tire adjacent to the first inner wheel, so that the outer wheel is convenient to install and maintain, other things are hung on the inner rim after the outer wheel is prevented from being disassembled, and damage to people or objects is prevented.

As shown in fig. 1 to 7, further, the other ends of the plurality of bolts 6 are connected to the outer wheel web 17.

The beneficial effects of adopting the further technical scheme are as follows: the bolts are connected, so that torque is effectively transmitted, and the structure is stable and reliable.

Further, the U-shaped groove 18 is in clearance fit with the process screw 21.

The beneficial effects of adopting the further technical scheme are as follows: the axial positioning of the inner wheel and the outer wheel is realized, the quick connection is realized, the positioning is accurate, and the time and the labor are saved.

As shown in fig. 1 to 7, further, a plurality of gaskets 5 are respectively sleeved on the outer side walls of the nuts 14.

The beneficial effects of adopting the further technical scheme are as follows: after the outer wheel slides in place, the outer wheel is fixed on the inner wheel web plate on the inner wheel through bolts and gaskets. The arrangement of the gasket is convenient for the installation and maintenance of the nut, prevents the nut from wearing the inner rim, prevents the nut from rotating or falling off, and improves the stability and reliability.

When single wheel operation is required, the first inner wheel 4 is mounted on the hub flange 2 by the hub bolts 3. When the agriculture requires double-wheel operation, the process screw rod 21 is diagonally arranged in the nut 14 in the nut sleeve 13 on the first inner wheel 4, and the U-shaped groove 18 on the first outer wheel 7 is clamped on the process screw rod 21, so that the first outer wheel 7 can transversely slide on the process screw rod 21. After the first outer wheel 7 is slid into place, the first outer wheel 7 is secured to the inner wheel web 10 on the first inner wheel 4 by bolts 6 and spacers 5.

Unlike the prior art double-hub solution, the first inner wheel 4 and the first outer wheel 7 are connected by the connecting sleeve 16, and the outer hub does not need to be mounted, thereby reducing the use of hoisting equipment. The outer wheel installation procedure is reduced, and the time for installing the outer wheel in field operation is greatly saved.

The process screw rod 21 structure is provided, and the positioning is accurate when the first outer wheel 7 is installed, so that time and labor are saved.

The structure can be used in the form of an extremely short half axle type rear axle or a flange type rear axle, the whole vehicle width is narrower under the condition of installing an outer wheel, the steering performance is good, and the vehicle is safe when being transported on a road.

By adopting the structure of the nut sleeve, when the bolt 6 is screwed up, a person is not required to position the nut on the other side of the tire, and the nut can be operated by a single person, so that the labor is saved.

When the nut 14 is damaged, the nut can be replaced by loosening the set screw 15, so that the maintainability is high.

The disassembly is convenient, the time is saved, and the labor intensity is low. The axial positioning of the inner wheel and the outer wheel can be realized through a guide sleeve structure (process screw rod), and the quick connection is realized. The inner and outer wheels are connected through a plurality of bolts, so that torque can be effectively transmitted, and the structure is stable and reliable.

In addition, the tractor comprises the nut sleeve type double-wheel quick-dismantling structure.

The technical scheme of the utility model has the beneficial effects that: the inner wheel and the outer wheel are simply separated and can be quickly disassembled. The process screw rod is used as a guide sleeve, the outer wheel is aligned with the guide sleeve arranged on the inner wheel during installation, stable and reliable connection can be realized by arranging bolts, positioning is accurate during installation of the outer wheel, time and labor are saved, assembly performance is improved, and operation intensity is low. Through the scheme that sets up the nut cover, nut detachably installs in the nut cover, after the nut damages, can light dismantlement nut. The need for an outboard hub is eliminated, thereby reducing the use of lifting equipment. The outer wheel installation procedure is reduced, and the time for installing the wheels in field operation is greatly saved. The steering device can be used in the form of an extremely short half axle type rear axle or a flange type rear axle, the width of the whole vehicle is narrower under the condition of installing an outer wheel, the steering performance is good, and the steering device is safe and reliable when being transported on a road. The nut sleeve structure is adopted, when the bolt is screwed, a person is not required to position the nut on the other side of the tire, and the nut can be operated by a single person, so that the labor is saved.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Claims (10)

1. The utility model provides a nut cover formula double round quick detach structure which characterized in that includes: the novel bicycle comprises a rear axle, a hub flange, a first inner wheel, a first outer wheel, a plurality of nut sleeves, a plurality of nuts, a plurality of bolts matched with the nuts, a pair of process screws and a pair of U-shaped grooves, wherein the hub flange is rotatably installed on the rear axle, the first inner wheel is installed on the hub flange, the plurality of nut sleeves are installed on the first inner wheel, the plurality of nuts are respectively and detachably installed in the plurality of nut sleeves, the pair of U-shaped grooves are formed in the first outer wheel, one ends of the plurality of bolts and one ends of the pair of process screws are installed in the plurality of nuts, the other ends of the pair of process screws are respectively installed in the pair of U-shaped grooves, and the other ends of the plurality of bolts are connected with the first outer wheel.

2. The nut sleeve type double-wheel quick release structure according to claim 1, wherein the nut is of an outer hexagonal structure, an inner hexagonal hole is formed in the nut sleeve, a threaded hole and a fastening screw are arranged on the outer side wall of the nut sleeve, a fastening hole is formed in the nut, the nut is installed in the nut sleeve, and one end of the fastening screw penetrates through the threaded hole and is connected with the fastening hole.

3. The nut-sleeved double-wheel quick release structure of claim 1, wherein the first inner wheel comprises: the inner rim is sleeved on the outer side of the inner rim, the first tire is sleeved on the outer side of the inner rim, one side of the inner rim is mounted on the hub flange, and a plurality of nut sleeves are mounted on the other side of the inner rim.

4. A nut-sleeved dual-wheel quick release structure according to claim 3 wherein one side of said inner web is mounted to said hub flange by a plurality of hub bolts.

5. The nut-sleeved double-wheel quick release structure according to claim 1, wherein the first outer wheel comprises: the connecting sleeve comprises a second tire, an outer rim, a connecting sleeve and an outer wheel spoke plate, wherein the outer wheel spoke plate is arranged on one side of the connecting sleeve, the outer rim is sleeved on the other side of the connecting sleeve, the second tire is sleeved on the outer side of the outer rim, a pair of U-shaped grooves are formed in the outer wheel spoke plate, and the outer wheel spoke plate is in butt joint with the first inner wheel.

6. The nut-sleeved dual-wheel quick release structure of claim 5, wherein a side of said connecting sleeve projects beyond a side of said second tire adjacent said first inner wheel.

7. The nut runner dual-wheel quick release structure as claimed in claim 5, wherein a plurality of said bolts are connected at their other ends to said outer wheel web.

8. The nut-sleeved double-wheel quick release structure according to claim 1, wherein the U-shaped groove is in clearance fit with the process screw.

9. The nut sleeve type double-wheel quick release structure according to claim 1, wherein gaskets are sleeved on outer side walls of a plurality of nuts.

10. A tractor comprising a nut-sleeved dual-wheel quick release structure according to any one of claims 1 to 9.