Wheel set mechanism for dual tire installation and tractor

Abstract

The present invention provides a wheel pair mechanism and a tractor for dual tire installation, wherein the wheel pair mechanism for dual tire installation includes a connecting structure and a main wheel, a spacer ring and a special wheel arranged coaxially, wherein the spacer ring is arranged between the main wheel and the special wheel, and the two ends of the connecting structure are detachably connected to the main wheel and the special wheel respectively. The present invention is used for installing dual tires on a tractor, wherein the spacer ring is arranged to avoid mutual interference between the first tire and the second tire; the main wheel and the special wheel are connected by the connecting structure to ensure the stability of the connection between the main wheel and the special wheel, and enable the main wheel and the special wheel to stably clamp the spacer ring; the coordination of the main wheel, the spacer ring, the special wheel and the connecting structure ensures the overall stability of the wheel pair mechanism for dual tire installation; and the two ends of the connecting structure are detachably connected to the main wheel and the special wheel respectively, which improves the convenience of loading and unloading and later maintenance of the wheel pair mechanism for dual tire installation.

Description

Technical Field

[0001] The present invention relates to the technical field of tractors, and in particular to a wheelset mechanism for mounting dual tires and a tractor. Background Art

[0002] In order to improve the braking and traction performance of the tractor, when the tractor is equipped with heavy farm implements and works on soil with low bearing capacity, dual tires on the rear wheels are usually used. Only in special circumstances, such as when used in waterlogged land with low grip, dual tires on the front wheels are used.

[0003] At present, the installation of dual tires on tractors is generally achieved through gaskets or extended axles. However, installing dual tires through gaskets has the following disadvantages: the gaskets are not strong enough and are easy to twist; installing dual tires through extended axles has the following disadvantages: when the dual tires are in use, the through axle is subjected to uneven force due to the torsional force, and is easily twisted and deformed to damage, and the repair after damage is also relatively complicated and difficult. When dual tires are not used, the shaft end of the extended axle is extended and exposed, posing a safety hazard. Summary of the invention

[0004] The problem solved by the invention is: how to improve the stability of the dual tires and the convenience of loading, unloading and maintenance.

[0005] To solve the above problems, the present invention provides a wheelset mechanism for dual tire installation, including a connecting structure and a coaxially arranged main wheel, a spacer ring and a special wheel, wherein the spacer ring is arranged between the main wheel and the special wheel, and the two ends of the connecting structure are detachably connected to the main wheel and the special wheel respectively.

[0006] Optionally, the first rim of the main wheel and the second rim of the special wheel are both coaxially arranged with the spacer ring, and a first mounting groove is provided at one end of the first rim facing the spacer ring, and a second mounting groove is provided at one end of the second rim facing the spacer ring, and both ends of the spacer ring are respectively plugged into and fitted with the first mounting groove and the second mounting groove.

[0007] Optionally, the special wheel further includes a thrust ring, which is arranged on the inner side wall of the second rim; one end of the connecting structure is detachably connected to the spoke plate of the main wheel, and the other end is detachably connected to the thrust ring.

[0008] Optionally, the connecting structure includes a locking bolt, a hook, a first connecting rod and a hook, one end of the locking bolt is detachably connected to the spoke plate, and the other end is connected to the hook, one end of the hook away from the locking bolt is threadedly connected to one end of the first connecting rod, and the other end of the first connecting rod is detachably connected to the thrust ring via the hook.

[0009] Optionally, the locking bolt includes a bolt and a connecting nut, one end of the connecting nut is connected to the spoke plate through the bolt; the other end of the connecting nut is provided with a connecting hole, and the connecting nut is connected to the hook through the connecting hole.

[0010] Optionally, the hook includes a cotter pin and a second connecting rod, a driving rod and a clip that are rotatably connected in sequence, and the end of the second connecting rod away from the driving rod is threadedly connected to the first connecting rod; the clip includes a first connecting portion and a locking portion, the locking portion is rotatably connected to the driving rod, and the locking portion is provided with a locking hole that is compatible with the cotter pin; the end of the first connecting portion away from the locking portion is provided with a slot that is compatible with the thrust ring, and when the first connecting portion is connected to the thrust ring through the slot, the locking hole and the slot are separated on opposite sides of the second connecting rod and the locking hole is plug-fitted with the cotter pin.

[0011] Optionally, the driving rod comprises a second connecting portion and a driving portion, and the second connecting rod and the locking portion are both rotatably connected to the second connecting portion; and an angle between an axis of the driving portion and an axis of the second connecting portion is an acute angle.

[0012] Optionally, a plurality of the connection structures are provided, and the plurality of connection structures are spaced apart around the axis of the spacer ring.

[0013] Optionally, a disassembly hole is provided on the side wall of the spacer ring.

[0014] In order to solve the above problems, the present invention further provides a tractor, comprising a wheelset mechanism for dual tire installation as described in any one of claims 1 to 9.

[0015] Compared with the prior art, the present invention has the following beneficial effects: by arranging a spacer ring between the main wheel and the special wheel, a certain distance is provided between the first rim and the second rim, so that a certain distance can be provided between the first tire and the second tire installed on the corresponding rim, so as to avoid the first tire and the second tire from interfering with each other. The connecting structure connects the main wheel and the special wheel to ensure the stability of the connection between the main wheel and the special wheel (connected by the connecting structure), and enables the main wheel and the special wheel to stably clamp the spacer ring, and through the cooperation of the main wheel, the spacer ring, the special wheel and the connecting structure, the overall stability of the wheelset mechanism for dual tire installation is ensured. Moreover, the two ends of the connecting structure are detachably connected to the main wheel and the special wheel respectively, so that the wheelset mechanism for dual tire installation is suitable for disassembly and assembly, and the convenience of loading and unloading and later maintenance of the wheelset mechanism for dual tire installation is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a partial structural schematic diagram of a wheelset mechanism for dual tire installation in an embodiment of the present invention;

[0017] Figure 2 for Figure 1 A partial enlarged view of the middle A;

[0018] Figure 3 for Figure 1 A partial enlarged view of point B in the middle;

[0019] Figure 4 It is a schematic structural diagram of the connection structure with the spoke plate and the second rim in an embodiment of the present invention;

[0020] Figure 5 Schematic diagram of the structure of the hook in the embodiment of the present invention.

[0021] Description of reference numerals:

[0022] 1-main wheel, 11-first rim, 111-first mounting groove, 12-spoke plate; 2-spacer ring, 21-disassembly hole, 13-first tire, 3-special wheel, 31-second rim, 311-second mounting groove, 32-thrust ring, 33-second tire; 4-connection structure, 41-locking bolt, 411-bolt, 412-connection nut, 4121-nut body, 4122-pull ring, 413 -washer, 42-hook, 43-first connecting rod, 44-hook, 441-second connecting rod, 4411-first clamping part, 4412-second clamping part, 4413-third connecting part, 442-driving rod, 4421-second connecting part, 4422-driving part, 443-clip, 4431-first connecting part, 4431a-slot, 4432-locking part, 4432a-locking hole. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0024] In the description of the present invention, it should be understood that the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Moreover, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0025] Combination Figure 1-Figure 5 As shown, an embodiment of the present invention provides a wheelset mechanism for dual tire installation, including a connecting structure 4 and a coaxially arranged main wheel 1, a spacer ring 2 and a special wheel 3, wherein the spacer ring 2 is arranged between the main wheel 1 and the special wheel 3, and the two ends of the connecting structure 4 are detachably connected to the main wheel 1 and the special wheel 3 respectively.

[0026] In this embodiment, the wheel pair mechanism for dual tire installation is suitable for vehicles such as tractors, and is used to realize dual tire installation of tractor front wheel dual tires (i.e., both front wheels on the left and right sides of the tractor use dual tires) and / or rear wheel dual tires (i.e., both rear wheels on the left and right sides of the tractor use dual tires), and improve the stability of the tractor when using dual tires and the convenience of loading, unloading and maintenance. Specifically, the wheel pair mechanism for dual tire installation includes at least two sets of main wheels 1 and special wheels 3, and the two sets of main wheels 1 and special wheels 3 are symmetrically arranged on the left and right sides of the tractor. For ease of description, the wheel pair mechanism for dual tire installation on one side of the tractor is described below, and the main wheel 1, the spacer ring 2 and the special wheel 3 are arranged in sequence along the width direction of the tractor, and the main wheel 1 is close to the tractor body and plays a major supporting role for the tractor body, and the special wheel 3 is used to assist in supporting the tractor body. In this way, the tractor body is supported by the main wheel 1 and the special wheel 3 together, which increases the contact area between the tractor and the ground and improves the driving stability of the tractor. The spacer ring 2 is arranged between the main wheel 1 and the special wheel 3 so that there is a certain distance between the rim of the main wheel 1 (recorded as the first rim 11) and the rim of the special wheel 3 (recorded as the second rim 31), so that there is a certain distance between the tire of the main wheel 1 (recorded as the first tire 13) and the tire of the special wheel 3 (recorded as the second tire 33) installed on the corresponding rim, so as to avoid the first tire 13 and the second tire 33 from interfering with each other. The connecting structure 4 connects the main wheel 1 and the special wheel 3 to ensure the stability of the connection between the main wheel 1 and the special wheel 3 (connected by the connecting structure 4), and enables the main wheel 1 and the special wheel 3 to stably clamp the spacer ring 2. Through the cooperation of the main wheel 1, the spacer ring 2, the special wheel 3 and the connecting structure 4, the overall stability of the wheelset mechanism for dual tire installation is ensured. Moreover, the two ends of the connecting structure 4 are detachably connected to the main wheel 1 and the special wheel 3, respectively, so that the wheelset mechanism for dual tire installation is suitable for disassembly and assembly, and the convenience of loading and unloading and later maintenance of the wheelset mechanism for dual tire installation is improved.

[0027] Optionally, combined Figure 1 , Figure 2 As shown, the first rim 11 of the main wheel 1 and the second rim 31 of the special wheel 3 are both coaxially arranged with the spacer ring 2, and a first mounting groove 111 is provided at one end of the first rim 11 facing the spacer ring 2, and a second mounting groove 311 is provided at one end of the second rim 31 facing the spacer ring 2, and both ends of the spacer ring 2 are respectively plugged into the first mounting groove 111 and the second mounting groove 311.

[0028] In this embodiment, the spacer ring 2 is an annular structure, and the first rim 11, which is also an annular structure, is plugged into and matched with one end of the spacer ring 2 through the first mounting groove 111, and the second rim 31, which is also an annular structure, is plugged into and matched with the other end of the spacer ring 2 through the second mounting groove 311. In this way, the stability of the spacer ring 2 when the main wheel 1 and the special wheel 3 are connected through the connecting structure 4 is further improved, that is, the overall stability of the wheelset mechanism for dual tire installation is further improved; moreover, the groove wall of the first mounting groove 111 and the spacer ring 2, and the groove wall of the second mounting groove 311 and the spacer ring 2 can play a role of mutual limitation in the vertical direction and the horizontal direction, which further improves the stability of the coaxial arrangement of the main wheel 1, the spacer ring 2 and the special wheel 3, and ensures that the main wheel 1, the spacer ring 2 and the special wheel 3 can be firmly connected through the connecting structure 4.

[0029] In some embodiments, when the main wheel 1, the spacer ring 2 and the special wheel 3 are assembled, an oily adhesive is applied to the connection between the main wheel 1 and the spacer ring 2, and to the connection between the special wheel 3 and the spacer ring 2 to further enhance the stability of the connection between the main wheel 1, the spacer ring 2 and the special wheel 3.

[0030] Optionally, combined Figure 1 , Figure 3 and Figure 4 As shown, the special wheel 3 further includes a thrust ring 32 , which is disposed on the inner side wall of the second rim 31 ; one end of the connecting structure 4 is detachably connected to the spoke plate 12 of the main wheel 1 , and the other end is detachably connected to the thrust ring 32 .

[0031] In this embodiment, the main wheel 1 includes a wheel hub, a spoke plate 12, a first rim 11 and a first tire 13; different from the main wheel 1, the special wheel 3 includes a second rim 31, a second tire 33 and a thrust ring 32 arranged on the inner side wall of the rim. The connecting structure 4 is arranged on the inner side of the first rim 11, the spacer ring 2 and the second rim 31, and the end of the connecting structure 4 facing the main wheel 1 is detachably connected to the spoke plate 12 of the main wheel 1. In the axial direction of the special wheel 3, one end of the thrust ring 32 facing the spacer ring 2 is connected to the inner side wall of the second rim 31 (for example, welded), and the other end extends in a direction away from the spacer ring 2, so that the end of the thrust ring 32 away from the spacer ring 2 and the inner side wall of the second rim 31 have a certain distance in the vertical direction and the horizontal direction, so that the thrust ring 32 and the connecting structure 4 can be detachably connected.

[0032] Optionally, the second tire 33 is the same size as the first tire 13, and the tire pressure of the second tire 33 is lower than that of the first tire 13, so that the first tire 13 can assume the main supporting role, reduce the stress and wear of the second tire 33, and extend the service life and reliability of the second tire 33. In some embodiments, the tire pressure of the second tire 33 is 1.2-1.25 times lower than that of the first tire 13.

[0033] Optionally, combined Figure 1 , Figure 4 As shown, the connection structure 4 includes a locking bolt 41, a hook 42, a first connecting rod 43 and a hook 44. One end of the locking bolt 41 is detachably connected to the spoke plate 12 of the main wheel 1, and the other end is connected to the hook 44. The end of the hook 44 away from the locking bolt 41 is threadedly connected to one end of the first connecting rod 43, and the other end of the first connecting rod 43 is detachably connected to the thrust ring 32 through the hook 44.

[0034] In the axial direction of the special wheel 3, the locking bolt 41, the draw hook 42, the first connecting rod 43 and the hook 44 are connected in sequence, and the locking bolt 41 and the hook 44 are detachably connected to the main wheel 1 and the special wheel 3, respectively, so as to realize the detachable connection between the connecting structure 4 and the main wheel 1 and the special wheel 3. Specifically, one end of the locking bolt 41 is detachably connected to the spoke plate 12 of the main wheel 1, and the other end is connected to the hook 44; the end of the hook 44 away from the locking bolt 41 is threadedly connected to one end of the first connecting rod 43, and the other end of the first connecting rod 43 is detachably connected to the thrust ring 32 through the hook 44. In this way, on the one hand, the convenience of installation, disassembly and maintenance of the connection structure 4 is improved, and the convenience of installation, disassembly and maintenance of the wheelset mechanism for dual tire installation is further improved; on the other hand, the positions of the hook 44 and the draw hook 42 on the first connecting rod 43 are suitable for adjustment, that is, the distance from the hook 44 to the draw hook 42 and the distance from the hook 44 to the locking bolt 41 are suitable for adjustment, so that the main wheel 1, the spacer ring 2 and the special wheel 3 are locked and connected in the axial direction of the special wheel 3 through the connection structure 4. After the main wheel 1, the spacer ring 2 and the special wheel 3 are connected through the connection structure 4, the distance from the special wheel 3 to the main wheel 1 in the axial direction of the special wheel 3 is kept unchanged, so as to improve the stability of the connection of the main wheel 1, the spacer ring 2 and the special wheel 3 through the connection structure 4, and improve the overall stability of the wheelset mechanism for dual tire installation.

[0035] Optionally, combined Figure 1 , Figure 4 As shown, the locking bolt 41 includes a bolt body 411 and a connecting nut 412, one end of the connecting nut 412 is connected to the spoke plate 12 of the main wheel 1 through the bolt body 411; the other end of the connecting nut 412 is provided with a connecting hole, and the connecting nut 412 is connected to the hook 42 through the connecting hole.

[0036] The spoke plate 12 of the main wheel 1 is provided with a mounting hole matched with the bolt body 411, and the bolt body 411 is threadedly connected with the connecting nut 412 at the mounting hole, and the connecting nut 412 is located on the side of the spoke plate 12 of the main wheel 1 facing the special wheel 3. The connecting nut 412 includes a nut body 4121 threadedly connected with the bolt body 411 and a pull ring 4122 arranged at one end of the nut body 4121 away from the spoke plate 12 of the main wheel 1, and a connecting hole matched with the draw hook 42 is provided on the draw ring 4122, so that the draw hook 42 can hook the locking bolt 41 through the connecting hole, so as to realize the detachable connection between the draw hook 42 and the locking bolt 41.

[0037] Optionally, combined Figure 1 , Figure 4 As shown, the locking bolt 41 also includes a washer 413 (for example, a spring washer 413), which is used to be sleeved on the screw of the bolt body 411 and placed between the nut of the bolt body 411 and the spoke plate 12 of the main wheel 1 to increase the contact area between the bolt body 411 and the spoke plate 12, thereby improving the stability of the connection between the locking bolt 41 and the spoke plate 12.

[0038] Optionally, the hook 44 includes a cotter pin and a second connecting rod 441, a driving rod 442 and a clip 443 that are rotatably connected in sequence, and the end of the second connecting rod 441 away from the driving rod 442 is threadedly connected to the first connecting rod 43; the clip 443 includes a first connecting portion 4431 and a locking portion 4432, the locking portion 4432 is rotatably connected to the driving rod 442, and the locking portion 4432 is provided with a locking hole 4432a that is compatible with the cotter pin; the end of the first connecting portion 4431 away from the locking portion 4432 is provided with a slot 4431a that is compatible with the thrust ring 32, and when the first connecting portion 4431 is connected to the thrust ring 32 through the slot 4431a, the locking hole 4432a and the slot 4431a are separated on opposite sides of the second connecting rod 441, and the locking hole 4432a is plug-matched with the cotter pin.

[0039] The second connecting rod 441, the driving rod 442 and the clip 443 are connected in rotation in sequence, so that the distance from the clip 443 to the second connecting rod 441 is suitable for adjustment (realized by the relative rotation of the driving rod 442 and the second connecting rod 441 and the relative rotation of the clip 443 and the driving rod 442), so as to improve the convenience of connecting and disassembling the clip 443 and the thrust ring 32; and make the connecting structure 4 applicable to main wheels 1, special wheels 3 or spacer rings 2 of different specifications (sizes), thereby improving the application range of the connecting structure 4. Specifically, the hook 44 is threadedly connected to the first connecting rod 43 through the second connecting rod 441, so as to facilitate the adjustment of the position of the second connecting rod 441 on the first connecting rod 43, so as to facilitate the adjustment to obtain a suitable position of the hook 44 connected to the thrust ring 32, thereby ensuring the stability of the connection between the connecting structure 4 and the special wheel 3. The clip 443 includes an integrally formed first connecting portion 4431 and a locking portion 4432, one end of the locking portion 4432 is rotatably connected to the driving rod 442, and the other end is connected to the first connecting portion 4431, and the end of the first connecting portion 4431 away from the locking portion 4432 is in a C-shaped (or L-shaped) structure, which surrounds a slot 4431a for connecting to the thrust ring 32; when the first connecting portion 4431 is connected to the thrust ring 32 through the slot 4431a, the first connecting portion 4431 is hooked on the thrust ring 32, and the portion of the locking portion 4432 with the locking hole 4432a is located on the side of the second connecting rod 441 away from the slot 4431a, and a cotter pin is provided in the locking hole 4432a to limit the rotational movement of the entire hook 44, thereby ensuring a stable connection between the hook 44 and the special wheel 3.

[0040] Optionally, combined Figure 5 As shown, the second connecting rod 441 and the clip 443 are both rotatably connected to the driving rod 442 via a rotating shaft (such as a pin shaft).

[0041] Optionally, combined Figure 5 As shown, the second connecting rod 441 includes a third connecting portion 4413 and a first clamping portion 4411 and a second clamping portion 4412 arranged on the third connecting portion 4413, and the first clamping portion 4411 and the second clamping portion 4412 are arranged opposite to each other and have a certain distance. The third connecting portion 4413 is threadedly connected to the first connecting rod 43. One end of the first clamping portion 4411 and the second clamping portion 4412 away from the third connecting portion 4413 clamps the driving rod 442 and is rotatably connected to the driving rod 442. When the second connecting rod 441 and the driving rod 442 rotate relative to each other, the portion of the locking portion 4432 provided with the locking hole 4432a is suitable for passing between the first clamping portion 4411 and the second clamping portion 4412. When the hook 44 is connected to the thrust ring of the special wheel 3 , the locking portion 4432 passes between the first clamping portion 4411 and the second clamping portion 4412 , and the cotter pin and the clamping groove 4431 a are separated on opposite sides of the second connecting rod 441 along the radial direction of the special wheel 3 .

[0042] Optionally, combined Figure 1 , Figure 4 As shown, the driving rod 442 includes a second connecting portion 4421 and a driving portion 4422 , and the second connecting rod 441 and the locking portion 4432 are both rotatably connected to the second connecting portion 4421 ; the angle between the axis of the driving portion 4422 and the axis of the second connecting portion 4421 is an acute angle.

[0043] In this embodiment, the driving rod 442 includes an integrally formed second connecting portion 4421 and a driving portion 4422, and the two ends of the second connecting portion 4421 are rotatably connected to the locking portion 4432 and the second connecting rod 441, respectively. The driving portion 4422 is arranged at one end where the second connecting portion 4421 is connected to the second connecting rod 441. By setting the driving portion 4422, the distance between the first connecting portion 4431 of the clip 443 and the second connecting rod 441 can be adjusted by driving the driving portion 4422 to rotate relative to the second connecting rod 441, so as to extend the distance between the first connecting portion 4431 and the second connecting rod 441 before the first connecting portion 4431 is connected to the thrust ring 32, so as to facilitate the connection between the first connecting portion 4431 and the thrust ring 32, and shorten the distance between the first connecting portion 4431 and the second connecting rod 441 after the first connecting portion 4431 is connected to the thrust ring 32, and realize the stable connection between the hook 44 and the special wheel 3 through the cooperation of the split pin. In some embodiments, the driving part 4422 is driven by a pipe wrench to rotate relative to the second connecting rod 441. For example, when disassembling the connection between the hook 44 and the special wheel 3, the cotter pin is first removed from the locking hole 4432a, and then the driving part 4422 is driven toward the axis of the special wheel 3 to disengage the slot 4431a from the thrust ring 32. When connecting the hook 44 and the special wheel 3, after the slot 4431a accommodates part of the thrust ring 32, the driving part 4422 is driven in a direction away from the axis of the special wheel 3, so that the thrust ring 32 is tightly attached to the slot wall of the slot 4431a, and after the locking hole 4432a on the locking part 4432 moves to the side of the second connecting rod 441 away from the slot 4431a, the cotter pin is inserted into the locking hole 4432a to limit the rotational movement of the driving rod 442 and the rotational movement of the entire hook 44, thereby ensuring a stable connection between the hook 44 and the special wheel 3.

[0044] The included angle between the axis of the driving portion 4422 and the axis of the second connecting portion 4421 (i.e. Figure 4 The angle α) is an acute angle (eg, 5°) to prevent a dead point from being formed during the movement of the driving rod 442. Preferably, the driving portion 4422 is tilted at a certain angle toward the axis of the special wheel 3 to avoid interference between the driving portion 4422 and the first connecting portion 4431.

[0045] Optionally, a plurality of connection structures 4 are provided, and the plurality of connection structures 4 are spaced apart around the axis of the spacer ring 2 .

[0046] In this embodiment, a plurality of connection structures 4 are provided, and the plurality of connection structures 4 are spaced around the axis of the spacer ring 2 on the inner side of the first rim 11, the spacer ring 2 and the second rim 31 to firmly connect the main wheel 1 and the special wheel 3, and improve the stability of the wheelset mechanism for dual tire installation. Preferably, the distance from each connection structure 4 to the axis of the special wheel 3 and the axis of the main wheel 1 is equal, and the distances between all two adjacent connection structures 4 are consistent, so as to ensure uniform mass distribution of the wheelset mechanism for dual tire installation, and further improve the stability of the wheelset mechanism for dual tire installation. In some embodiments, the wheelset mechanism for dual tire installation connects the main wheel 1 and the special wheel 3 on one side of the tractor through 6 connection structures 4.

[0047] Optionally, combined Figure 1 As shown, a disassembly hole 21 is provided on the side wall of the spacer ring 2 .

[0048] In this embodiment, the disassembly hole 21 is set through the side wall of the spacer ring 2. By setting the disassembly hole 21, when the wheelset mechanism for dual tire installation is installed or disassembled, the spacer ring 2 can be fixed (for example, hoisted and unloaded) through the disassembly hole 21, so as to ensure that the special wheel 3 can be installed or disassembled smoothly, and at the same time, the stability of the main wheel 1, the spacer ring 2, etc. during the disassembly process of the special wheel 3 is ensured, and the safety of the on-site personnel is guaranteed; and it is convenient to determine the position of the connection structure 4 according to the disassembly hole 21 (as a reference), so as to facilitate the adjustment of the position of the connection structure 4.

[0049] Optionally, the wheel pair mechanism for dual tire installation may also be provided with at least two special wheels 3 on one side of the tractor, that is, a main wheel 1 and at least two special wheels 3 are provided on both sides of the tractor. The at least two special wheels 3 on one side of the tractor are connected to the main wheel 1 through a plurality of connection structures 4. Spacer rings 2 may also be provided between the special wheels 3.

[0050] An embodiment of the present invention further provides a tractor, comprising the above-mentioned wheelset mechanism for dual tire installation.

[0051] In this embodiment, the tractor is equipped with dual front wheels and / or dual rear wheels by using a wheel pair mechanism for dual tire installation. The tractor having a wheel pair mechanism for dual tire installation, by setting a spacer ring 2 between the main wheel 1 and the special wheel 3, so that there is a certain distance between the first rim 11 and the second rim 31, so that there can be a certain distance between the first tire 13 and the second tire 33 installed on the corresponding rim, so as to avoid the first tire 13 and the second tire 33 from interfering with each other. The connecting structure 4 connects the main wheel 1 and the special wheel 3 to ensure the stability of the connection between the main wheel 1 and the special wheel 3 (connected by the connecting structure 4), and enables the main wheel 1 and the special wheel 3 to stably clamp the spacer ring 2. Through the cooperation of the main wheel 1, the spacer ring 2, the special wheel 3 and the connecting structure 4, the overall stability of the wheel pair mechanism for dual tire installation is ensured. Moreover, the two ends of the connecting structure 4 are detachably connected to the main wheel 1 and the special wheel 3, respectively, so that the wheel pair mechanism for dual tire installation is suitable for disassembly and assembly, and the convenience of loading and unloading and later maintenance of the wheel pair mechanism for dual tire installation is improved.

[0052] Although the disclosure is disclosed as above, the protection scope of the disclosure is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A wheelset mechanism for dual tire installation, characterized in that: It comprises a connecting structure (4) and a main wheel (1), a spacer ring (2) and a special wheel (3) which are coaxially arranged, wherein the spacer ring (2) is arranged between the main wheel (1) and the special wheel (3), and the two ends of the connecting structure (4) are respectively detachably connected to the main wheel (1) and the special wheel (3); The first rim (11) of the main wheel (1) and the second rim (31) of the special wheel (3) are both coaxially arranged with the spacer ring (2); a first mounting groove (111) is provided at one end of the first rim (11) facing the spacer ring (2); a second mounting groove (311) is provided at one end of the second rim (31) facing the spacer ring (2); and two ends of the spacer ring (2) are respectively plugged into and matched with the first mounting groove (111) and the second mounting groove (311); The special wheel (3) further comprises a thrust ring (32), wherein the thrust ring (32) is arranged on the inner side wall of the second wheel rim (31); one end of the connecting structure (4) is detachably connected to the spoke plate (12) of the main wheel (1), and the other end is detachably connected to the thrust ring (32); The connection structure (4) comprises a locking bolt (41), a draw hook (42), a first connecting rod (43) and a hook (44); one end of the locking bolt (41) is detachably connected to the spoke plate (12), and the other end is connected to the draw hook (42); one end of the draw hook (42) away from the locking bolt (41) is threadedly connected to one end of the first connecting rod (43); and the other end of the first connecting rod (43) is detachably connected to the thrust ring (32) via the hook (44); The hook (44) comprises a cotter pin, a second connecting rod (441), a driving rod (442) and a clip (443) which are rotatably connected in sequence, wherein one end of the second connecting rod (441) away from the driving rod (442) is threadedly connected to the first connecting rod (43); the clip (443) comprises a first connecting portion (4431) and a locking portion (4432), wherein the locking portion (4432) is rotatably connected to the driving rod (442), and the locking portion (4432) is provided with a first connecting portion (4431) and a locking portion (4432) which is rotatably connected to the cotter pin. a locking hole (4432a) adapted to the second connecting rod (441); a slot (4431a) adapted to the thrust ring (32) is provided at one end of the first connecting portion (4431) away from the locking portion (4432); when the first connecting portion (4431) is connected to the thrust ring (32) via the slot (4431a), the locking hole (4432a) and the slot (4431a) are located on opposite sides of the second connecting rod (441), and the locking hole (4432a) is plug-fitted with the cotter pin; The driving rod (442) comprises a second connecting portion (4421) and a driving portion (4422); the second connecting rod (441) and the locking portion (4432) are both rotatably connected to the second connecting portion (4421); the driving portion (4422) is arranged at one end where the second connecting portion (4421) is connected to the second connecting rod (441), and is used to adjust the distance between the first connecting portion (4431) of the clip (443) and the second connecting rod (441).

2. The wheelset mechanism for dual tire installation according to claim 1, characterized in that: The locking bolt (41) comprises a bolt body (411) and a connecting nut (412); one end of the connecting nut (412) is connected to the spoke plate (12) via the bolt body (411); the other end of the connecting nut (412) is provided with a connecting hole, and the connecting nut (412) is connected to the draw hook (42) via the connecting hole.

3. The wheelset mechanism for dual tire installation according to claim 1, characterized in that: The angle between the axis of the driving portion (4422) and the axis of the second connecting portion (4421) is an acute angle.

4. The wheelset mechanism for dual tire installation according to any one of claims 1 to 3, characterized in that: A plurality of the connection structures (4) are provided, and the plurality of connection structures (4) are arranged at intervals around the axis of the spacing ring (2).

5. The wheelset mechanism for dual tire installation according to any one of claims 1 to 3, characterized in that: A disassembly hole (21) is provided on the side wall of the spacer ring (2).

6. A tractor, characterized in that: It comprises a wheelset mechanism for dual tire installation as claimed in any one of claims 1 to 5.

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