Tank transport vehicle

Abstract

The utility model discloses a tank transport vehicle, including a vehicle frame and a plurality of shift wheel units; these shift wheel units are assembled at the bottom of the vehicle frame in a rectangular array of at least two columns and at least two rows along the longitudinal direction of the vehicle frame; and each shift wheel unit is composed of a wheel frame and two groups of rollers, the longitudinal middle of the wheel frame is hingedly assembled at the bottom of the vehicle frame through a wheel frame shaft, the two groups of rollers are assembled at the longitudinal ends of the wheel frame and at the longitudinal sides of the wheel frame shaft with a rotatable structural spacing, and the rotation direction of the rollers is along the longitudinal direction of the vehicle frame. The utility model has the technical characteristics of strong carrying capacity, and its shift wheel unit can produce a tilting and lifting action at the bottom of the vehicle frame as the flatness of the working ground changes, has good vibration reduction and obstacle crossing capabilities, has low technical requirements for the flatness of the working ground, and is highly practical.

Description

Technical Field

[0001] The utility model relates to transporting equipment, in particular to a tank transporting vehicle. Background Art

[0002] Traditionally, the handling of heavy equipment is achieved by rollers, but it has technical problems such as cumbersome operation, time-consuming and labor-intensive, and poor safety. In order to solve this technical problem and realize the handling of heavy equipment, the industry has developed a handling tank, also known as a small handling tank. Its frame is formed with forged steel plates, and there are several shift rollers arranged at the bottom. The overall technical characteristics are strong pressure-bearing capacity. When using a handling tank in conjunction with a crowbar or claw jack to transport heavy equipment, it can save a lot of manpower and time. It has the technical characteristics of being easy to use, time-saving, labor-saving, and safe, and effectively replaces the traditional roller handling method.

[0003] Common transport tanks are those in which a number of displacement rollers are directly assembled at the bottom of the frame with roller shafts. The displacement rollers can only generate rotational motion in the direction of travel at the bottom of the frame, and cannot be extended or retracted at the bottom of the frame, so that all the displacement rollers form a fixed displacement plane at the bottom of the frame. For example, Chinese patent documents disclose technologies such as "A combined transport tank" (publication number CN 218703343 U, publication date March 24, 2023) and "A lifting tank for transporting goods" (publication number CN216548169 U, publication date May 17, 2022). This type of transport tank, since all the displacement rollers form a fixed displacement plane at the bottom of the frame, is only suitable for flat ground in working conditions. If the working ground is bumpy, the displacement rollers are easily blocked and / or only part of the displacement rollers touch the ground, while the other part of the displacement rollers are suspended and overloaded. It can be seen that the current conventional tank transport vehicles have very high technical requirements for the working conditions and ground conditions they are adapted to, and cannot be reliably used on bumpy working surfaces, which has great limitations.

[0004] In the search conducted by the applicant, it was found that a Chinese patent document disclosed a transport tank vehicle that can adapt to various ground surfaces such as small potholes, small bumps, and rugged terrain, and has the ability to overcome obstacles, as detailed in the technology entitled "A small transport tank vehicle that can adapt to various ground obstacles" (publication number CN 214003952 U, publication date August 20, 2021). However, the technical purpose of this technology is achieved based on a complex cross-steering device. Under the influence of this cross-steering device, the entire transport tank vehicle has technical problems such as complex molding structure, difficult molding technology, and high molding cost. Utility Model Content

[0005] The technical purpose of the utility model is to provide a transport tank vehicle with a simple molding structure, strong load-bearing capacity and low technical requirements for the flatness of the working ground, in view of the particularity of the above-mentioned transport tank vehicle and the shortcomings of the existing technology.

[0006] The technical purpose of the utility model is achieved through the following technical solution: a tank transport vehicle, comprising a vehicle frame and a plurality of shift wheel units;

[0007] The shifting wheel units are mounted at the bottom of the frame in a rectangular array of at least two columns and at least two rows along the longitudinal direction of travel of the frame;

[0008] Each shift wheel unit is composed of a wheel frame and two groups of rollers. The longitudinal middle part of the wheel frame is hingedly assembled at the bottom of the frame through the wheel frame shaft. The two groups of rollers are assembled at the longitudinal ends of the wheel frame and on the longitudinal sides of the wheel frame shaft with a rotatable structural spacing. The rotation direction of the rollers is along the longitudinal direction of the frame.

[0009] The above technical measures evenly arrange multiple shift wheel units in a rectangular array at the bottom of the frame, which can tend to balance the force in working conditions and has the technical characteristics of strong load-bearing capacity.

[0010] At the same time, in the above technical measures, each shift wheel unit is composed of a wheel frame independent of the frame and two sets of rollers. The wheel frame is assembled at the bottom of the frame in a middle hinged manner, so that the rollers at the longitudinal ends of the wheel frame can produce a tilting and lifting action at the bottom of the frame as the flatness of the working ground changes, so as to adapt to a certain degree of potholes and uneven working ground, and enhance its vibration reduction and obstacle crossing capabilities. It can be seen that its technical requirements for the flatness of the working ground are relatively low, and the overall molding structure is simple and easy to mold.

[0011] As one of the preferred solutions, the wheel frame is composed of two end plates arranged at intervals and connecting ribs connected between the two end plates, forming an I-shaped structure in the transverse direction of the wheel frame;

[0012] The contour structures of the two end plates are respectively elliptical, and the centers of the two end plates are respectively formed with a through-shaft hole for passing the same wheel frame shaft;

[0013] In the longitudinal direction of the wheel frame, two through-axle holes for inserting the same roller axle are formed between the two end plates at each end, and the two through-axle holes at both ends and the one through-axle hole at the center of the circle are on the long axis of the elliptical end plate;

[0014] The corresponding roller shafts of the two groups of rollers are rotatably mounted in the corresponding two shaft holes at the longitudinal ends of the wheel frame, and the rotation tracks of the assembled rollers extend out of the lowest position of the bottom side profile of the wheel frame.

[0015] The shift wheel unit of the above technical measures forms a rotatable and displaceable integrated structure independently of the molding structure of the frame, so as to facilitate reliable assembly of the tilting action at the bottom of the frame.

[0016] Furthermore, the bottom profile structure of the elliptical end plate has the following matching relationship:

[0017] The virtual connecting surface at the bottom end of the minor axis direction, from the contour edge corresponding to the vertical direction of the horizontal plane at the bottom side at the two centers of the through-axis hole, forms an angle of 9 to 13 degrees with the horizontal plane at the bottom end of the minor axis direction.

[0018] The shift wheel unit formed by the end plate of the above technical measures can achieve a certain degree of vibration reduction, obstacle crossing, and reduced blocking when walking at the bottom of the frame, ensuring smooth handling operations, and can also reduce the bumps during walking to ensure the stability of transportation. In other words, if the angle selection on the above contour structure is too small, there will be a technical problem of walking blocking, and if it is too large, there will be obvious technical problems of walking bumps. The above optimal selection achieves an effective balance between blocking and bumps, reducing both the blocking phenomenon and the bumps.

[0019] Furthermore, the wheel frame has two connecting ribs arranged at intervals along the short axis direction of the end plate, and the two connecting ribs are located at the top and bottom sides of the axle hole 1. This technical measure can effectively enhance the strength of the wheel frame's force-bearing structure.

[0020] As one of the preferred solutions, the roller is a nylon wheel structure. This technical measure can meet the high-strength load-bearing requirements on the one hand, has the technical characteristics of long-term wear resistance on the other hand, and is light in weight compared to steel wheels, which is conducive to reducing the molding weight of the entire vehicle.

[0021] As one of the preferred solutions, the multiple shift wheel units at the bottom of the frame are divided into a group with two shift wheel units arranged adjacent to each other in the horizontal direction of the frame;

[0022] Two shifting wheel units of the same group are hingedly assembled in the same wheel set frame through corresponding wheel frame shafts, and the wheel set frame is assembled at the bottom of the frame.

[0023] The above technical measures are conducive to reducing the technical difficulty of assembling the shift wheel unit at the bottom of the frame, that is, firstly, the two shift wheel units are reliably assembled in the same wheel set frame with a simple structure with strong operability to form an integrated module, and then the wheel set frame is assembled at the bottom of the frame, thereby greatly reducing the technical difficulty of assembling the shift wheel unit at the bottom of the frame.

[0024] Furthermore, the wheel set frame is composed of a side support plate 1, a middle support plate 1, a middle support plate 2, a side support plate 2 arranged in sequence, and two positioning plates which are connected in series at both ends to form a whole, forming a frame structure, each support plate is arranged along the horizontal spacing of the frame, and the two positioning plates are arranged along the longitudinal spacing of the frame;

[0025] In the lateral direction of the frame, the interior of the wheel assembly frame is divided into relatively independent shift wheel assembly chamber 1, insertion chamber and shift wheel assembly chamber 2 in sequence by the supporting plates;

[0026] One shift wheel unit in the same group is hingedly assembled between the side support plate 1 and the middle support plate 1 on both sides of the shift wheel assembly cavity 1 through the corresponding wheel frame shaft; another shift wheel unit in the same group is hingedly assembled between the side support plate 2 and the middle support plate 2 on both sides of the shift wheel assembly cavity 2 through the corresponding wheel frame shaft; and the bottom side of the wheel frame of the shift wheel unit extends out of the bottom side of the wheel assembly frame;

[0027] The wearing cavity is formed with three axle holes for wearing the same wearing axle between the two ends along the longitudinal direction of the frame, and the wheelset frame is assembled at the bottom of the frame through the wearing axle that is worn through the three axle holes and passes through the wearing cavity.

[0028] The wheel set frame of the above technical measures, on the one hand, is conducive to the reliable assembly and molding of the shift wheel unit with a simple structure; on the other hand, it is conducive to the reliable assembly of the wheel set frame at the bottom of the frame with a simple structure; and on the third hand, the assembly structure of the wheel set frame at the bottom of the frame is free from interference with the rotation and tilting action of the shift wheel unit, and the overall reliability is high.

[0029] Furthermore, the bottom of the frame is formed with a wheel assembly cavity in a concave structure for assembling each wheel assembly frame;

[0030] The wheel set frame is assembled in the wheel set assembly cavity corresponding to the bottom of the frame through the assembly shaft.

[0031] On the one hand, the above technical measures are conducive to the assembly and forming of the wheelset frame through the mounting shaft in a simple and reliable structure. On the other hand, the frame uses the assembly structure to form an anti-deflection limit for the wheelset frame, that is, it is directly limited by the mounting shaft in the longitudinal direction of travel without causing the wheelset frame to deflect, and it is directly limited by the wheelset assembly cavity in the lateral direction of travel without causing the wheelset frame to deflect around the mounting shaft.

[0032] Furthermore, in the longitudinal direction of the frame, the wheelset frames in the same row are assembled at the bottom of the frame through the same threading shaft. This technical measure is aimed at the rectangular array arrangement structure of the wheelset frames at the bottom of the frame, and the assembly structure of the shifting wheel unit of each wheelset frame, so that the assembly structure of each wheelset frame at the bottom of the frame can be greatly simplified, the difficulty of assembly technology can be reduced, and it is easy to form.

[0033] Furthermore, the bottom of the frame is equipped with six wheel sets in a rectangular array of two columns and three rows along the longitudinal direction of travel. This technical measure is based on the size specifications of conventional transport tanks and forms a transport tank with high load-bearing capacity with a simple structure.

[0034] The beneficial technical effect of the utility model is that the above technical measures evenly arrange multiple shift wheel units in a rectangular array at the bottom of the frame, which can tend to be force balanced in working conditions and has the technical characteristics of strong bearing capacity, which is better than the technologies of publication numbers CN 218703343 U and CN 216548169 U.

[0035] In the above technical measures, each shift wheel unit is composed of a wheel frame independent of the frame and two sets of rollers. The wheel frame is assembled at the bottom of the frame in a middle hinged manner, so that the rollers at the longitudinal ends of the wheel frame can produce a tilting and lifting action at the bottom of the frame as the flatness of the working ground changes, so as to adapt to a certain degree of potholes and uneven working ground, and enhance its vibration reduction and obstacle crossing capabilities. It can be seen that its technical requirements for the flatness of the working ground are relatively low, and it is also better than the technologies of publication numbers CN 218703343U and CN 216548169 U.

[0036] In the above technical measures, the shift wheel units arranged transversely to the frame are assembled in groups of two in the same wheel set frame, and then the wheel set frame is assembled at the bottom of the frame through the installation shaft arranged longitudinally to the frame. Firstly, it does not interfere with the rotation of the roller, secondly, it does not interfere with the tilting and lifting of the shift wheel unit, and thirdly, it can simplify the difficulty of assembly, so that the shift wheel unit can be reliably formed with a simple structure at the bottom of the frame, which is easy to assemble, form, disassemble and replace, and is superior to the technology of publication number CN 214003952 U. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a structural schematic diagram of the utility model.

[0038] Figure 2 for Figure 1 A bottom-up stereoscopic view of the main part of the frame.

[0039] Figure 3 for Figure 2 A schematic diagram of the structure of the wheel set frame and the assembled shift wheel unit.

[0040] Figure 4 for Figure 3 Schematic diagram of the structure of the shift wheel unit.

[0041] Figure 5 for Figure 4 Schematic diagram of the wheel frame structure.

[0042] Figure 6 This is a reference diagram of a usage state of the utility model.

[0043] Meanings of the codes in the figure: 1—vehicle frame; 11—wheel assembly cavity; 12—panel; 13—transverse rib plate; 14—longitudinal rib plate; 2—shift wheel unit; 21—wheel frame; 211—end plate; 212—connecting rib; 213—through-axle hole one; 214—through-axle hole two; 22—roller; 23—wheel frame shaft; 24—roller shaft; 3—wheel frame; 31—side bearing plate one; 32—middle bearing plate one; 33—middle bearing plate two; 34—side bearing plate two; 35—positioning plate; 36—shift wheel assembly cavity one; 37—through-axle cavity; 38—shift wheel assembly cavity two; 39—through-axle hole three; 4—through-axle; 5—traction rod; a—angle. DETAILED DESCRIPTION

[0044] The utility model relates to a transporting device, specifically a tank transporting vehicle. The main technical solution of the utility model is specifically described below in combination with multiple embodiments. Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 The technical solution of the present utility model is clearly and in detail explained; although other embodiments are not separately drawn with drawings, their main structures can still refer to the drawings of embodiment 1.

[0045] It should be noted that the drawings of the present invention are schematic, and unnecessary details have been simplified to clarify the technical purpose of the present invention, so as to avoid blurring the technical solution of the present invention in the prior art. In addition, the expressions "approximately" and "substantially" in the following text regarding quantity or matching relationship mean that reasonable assembly errors and processing errors in the industry are allowed to exist, and do not literally express absolute quantity or matching relationship.

[0046] Example 1

[0047] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, the tank transport vehicle of the present invention comprises a plate-shaped frame 1, six frame-type wheel set frames 3 and twelve shifting wheel units 2.

[0048] Specifically, the frame 1 is a steel structure, mainly composed of a panel 12, three longitudinal ribs 14 and four transverse ribs 13. The panel 12 is a rectangular structure, with its length direction as the longitudinal direction of travel and its width direction as the transverse direction of travel. When used in working conditions, the longitudinal direction of travel is used as the forward and backward directions; the top side surface of the panel 12 is flat. The three longitudinal ribs 14 are arranged side by side at uniform intervals along the width direction of the panel 12, and each longitudinal rib 14 protrudes from the bottom side surface of the panel 12 along the length direction of the panel 12. The four transverse ribs 13 are arranged side by side at uniform intervals along the length direction of the panel 12, and each transverse rib 13 protrudes from the bottom side surface of the panel 12 along the width direction of the panel 12. Thus, three longitudinal ribs 14 and four transverse ribs 13 divide six wheel assembly cavities 11 arranged in a rectangular array on the bottom side of the panel 12. Two of the six wheel assembly cavities 11 are arranged in the width direction of the panel 12 and three are arranged in the length direction of the panel 12, which are used to assemble the following six wheel assembly frames 3. In order to simplify the assembly structure of the following six wheel assembly frames 3, four axle holes are respectively opened at the width center of the two longitudinal rows of wheel assembly cavities 11 with reference to the length direction of the panel 12 (i.e., the longitudinal direction of the frame 1). Each of the four axle holes longitudinally penetrates each transverse rib 13, and each of the four axle holes is used to pass the same passing axle 4.

[0049] In order to facilitate the application of force for traction, a traction support is formed at the front end of the frame 1, and a traction rod 5 is connected to the traction support.

[0050] The wheel set frame 3 is a steel structure, which is composed of a side support plate 1 31, a middle support plate 1 32, a middle support plate 2 33, a side support plate 2 34 arranged in sequence, and two positioning plates 35 which are connected in series at both ends to form a whole. The outer contour structure of the wheel set frame 3 matches the wheel set assembly cavity 11 at the bottom of the frame 1. In the cooperation with the frame 1, each support plate is arranged along the horizontal spacing of the frame 1, and the two positioning plates 35 are arranged along the longitudinal spacing of the frame 1. In this way, in the horizontal direction of the frame 1, the interior of the wheel set frame 3 is divided into a relatively independent shift wheel assembly cavity 1 36, a wear cavity 37 and a shift wheel assembly cavity 2 38 by each support plate. The shift wheel assembly cavity 1 36 and the shift wheel assembly cavity 2 38 are used to assemble the shift wheel unit 2 described below, and the wear cavity 37 is used to wear the wear shaft 4 so that the wheel set frame 3 is assembled at the bottom of the frame 1. In order to allow the insertion shaft 4 to be inserted into the wheel set frame 3, the insertion cavity 37 is formed with axle holes 39 for inserting the same insertion shaft 4 between the two ends along the longitudinal direction of the frame 1. In order to reduce the difficulty of assembling the wheel set frame 3 in the corresponding wheel set assembly cavity 11 at the bottom of the frame 1 and facilitate assembly, the outer contour size of the wheel set frame 3 is slightly smaller than the size of the wheel set assembly cavity 11 at the bottom of the frame 1, so as to form an assembly gap.

[0051] When the wheel set frame 3 of the above structure is inserted into the corresponding wheel set assembly cavity 11 at the bottom of the above frame 1, the three axle holes 39 at both ends of the insertion cavity 37 of the wheel set frame 3 should correspond to the four axle holes 4 of the wheel set assembly cavity 11 in the same row at the bottom of the frame 1. When the three wheel set frames 3 are correspondingly inserted into the three wheel set assembly cavities 11 in the same row at the bottom of the frame 1, the three axle holes 39 and the four axle holes in the row can form an axial correspondence, so that the same insertion shaft 4 is longitudinally connected in series along the movement of the frame 1, so that the longitudinally arranged insertion shaft 4 forms an assembly of the wheel set frames 3 in the same row at the bottom of the frame 1, that is, the wheel set frame 3 is assembled in the corresponding wheel set assembly cavity 11 at the bottom of the frame 1 through the insertion shaft 4, and at this time, the insertion shaft 4 of the wheel set frame 3 inserted through the three axle holes 39 passes through the middle insertion cavity 37, and does not interfere with the shift wheel assembly cavity 1 36 and the shift wheel assembly cavity 2 38 at the two side positions.

[0052] The shifting wheel unit 2 is composed of a wheel frame 21 and two groups of rollers 22 .

[0053] More specifically, the wheel frame 21 is a steel structure, having two end plates 211 arranged at intervals and two connecting ribs 212 connected between the two end plates 211, forming an I-shaped structure in the transverse direction of the wheel frame 21 (i.e., the transverse direction of the vehicle frame 1). The contour structures of the two end plates 211 are basically elliptical, with a height dimension smaller than a length dimension, forming a longitudinal long axis direction and a height short axis direction, and the contour structure smoothly transitions from the length center to the end with a gradually changing curved surface structure. The two end plates 211 are respectively formed at the center of the circle with an axle hole 213 for passing the same wheel frame axle 23. In the longitudinal direction of the wheel frame 21 (i.e. the longitudinal direction of the vehicle frame 1), a second through-shaft hole 214 for inserting the same roller shaft 24 is formed between the two end plates 211 at each end (only near the end position), and the second through-shaft hole 214 at both ends and the first through-shaft hole 213 at the center of the circle are basically located on the long axis of the elliptical end plate 211. Two connecting ribs 212 are arranged along the short axis of the end plate 211 at intervals, located at the top and bottom sides of the first through-shaft hole 213, and do not affect the free insertion of the connecting shaft 23.

[0054] In the above wheel frame 21 structure, in order to improve the smoothness and stability of walking, the bottom side profile structure of the above elliptical end plate 211 should satisfy the following matching relationship:

[0055] When the wheel frame 21 is placed in a non-tilted horizontal position, an angle a of about 9 to 13° (such as an angle of 10°, 11° or 12°) is formed between the contour edge corresponding to the vertical direction of the horizontal plane on the bottom side from the center of the second axle hole 214 to the virtual connecting surface at the bottom end in the short axis direction and the horizontal plane at the bottom end in the short axis direction.

[0056] The two groups of rollers 22 are nylon wheel structures. The two groups of rollers 22 have their own roller shafts 24 at their axis centers. The roller shafts 24 can be end shafts connected to the ends of the rollers 22, or long shafts axially passing through the rollers 22 (if this structure is used, it is best to assemble the bearing assembly at the point where the roller shaft and the roller are installed to enhance the flexibility of rotation and walking). The corresponding roller shafts 24 of the two groups of rollers 22 are rotatably assembled in the corresponding shaft holes 214 at the longitudinal ends of the above-mentioned wheel frame 21 through the bearing assembly. When the rollers 22 are assembled in place on the above-mentioned wheel frame 21, the rotation track of the rollers 22 should not interfere with the connection ribs 212 of the wheel frame 21, and should extend out of the lowest position of the bottom side profile of the wheel frame 21. The height difference of the rotation track of the rollers 22 extending out of the lowest position of the bottom side profile of the wheel frame 21 should not be too large, otherwise the bumpy feeling will be more obvious during walking. It is best to be 1 / 10 to 3 / 10 of the diameter of the rollers 22.

[0057] There are twelve shifting wheel units 2 formed by the above structure, and these twelve are grouped in two. Two shifting wheel units 2 in the same group are hingedly assembled in the same wheel set frame 3 of the above structure through the corresponding wheel frame shaft 23, and then the wheel set frame 3 is assembled in the corresponding wheel set assembly cavity 11 at the bottom of the above frame 1 according to the above assembly structure.

[0058] More specifically, one shift wheel unit 2 in the same group is hingedly assembled between the side bearing plate 1 31 and the middle bearing plate 1 32 on both sides of the shift wheel assembly cavity 1 36 of the above-mentioned wheel set frame 3 through the corresponding wheel frame shaft 23. In order to ensure the flexibility of the hinged assembly, a bearing assembly can be assembled at the insertion of the connecting shaft 23 and the side bearing plate 1 31 and the middle bearing plate 1 32. Another shift wheel unit 2 in the same group is hingedly assembled between the side bearing plate 2 34 and the middle bearing plate 2 33 on both sides of the shift wheel assembly cavity 2 38 of the above-mentioned wheel set frame 3 through the corresponding wheel frame shaft 23. In order to ensure the flexibility of the hinged assembly, a bearing assembly can be assembled at the insertion of the connecting shaft 23 and the side bearing plate 2 34 and the middle bearing plate 2 33. When the shift wheel unit 2 is hingedly assembled in place, in the initial state of non-tilting, the bottom side of the wheel frame 21 should extend out of the bottom side of the wheel set frame 3 so as not to be interfered by the wheel set frame 3 when contacting the ground. Of course, in order to ensure that the shifting wheel unit 3 can adapt to the unevenness of the ground and tilt in the wheel set frame 3, the shifting wheel unit 2 that is hinged and assembled in place should have a tilting activity space with the relative structure on the top side of the wheel set frame 3, such as the bottom surface of the panel 12 of the frame 1, in the initial state without tilting. Due to the matching structure between the wheel set frame 3 and the frame 1, the rotation direction of the roller 22 of the shifting wheel unit 2 is along the longitudinal direction of the frame 1.

[0059] According to the assembly structure of the shift wheel unit 2 under the transition of the wheel set frame 3 at the bottom of the frame 1, the twelve shift wheel units 2 are assembled at the bottom of the frame 1 along the longitudinal direction of the frame 1 to form a rectangular array of four columns and three rows.

[0060] See also Figure 6 As shown, when the transport tank of the utility model transports heavy equipment, a herringbone arrangement of one main (i.e., transport tank A) and two auxiliary (i.e., transport tank B and transport tank C) can be formed at the bottom of the heavy equipment, with transport tank A serving as the head ox for traction and transport tank B and transport tank C serving as auxiliary oxen for cooperating in the shifting. The auxiliary oxen do not need to pull and therefore have no traction rod structure.

[0061] Example 2

[0062] The other contents of this embodiment are the same as those of Embodiment 1, except that:

[0063] Each wheel frame is fixed to the bottom of the frame by an independent pin or bolt, that is, the wheel frames in the same row no longer share the same mounting shaft.

[0064] Compared with the first embodiment, the technical difficulty of assembly and disassembly is increased in this embodiment.

[0065] Example 3

[0066] The other contents of this embodiment are the same as those of Embodiment 1, except that:

[0067] The wheel assembly cavity at the bottom of the frame is miniaturized according to the overall outline of the shift wheel unit;

[0068] The wheel set frame is eliminated, and each shift wheel unit is directly hinged and assembled in a corresponding assembly cavity at the bottom of the frame through its own wheel frame shaft.

[0069] Compared with the first embodiment, the technical difficulty of assembly and disassembly is increased in this embodiment.

[0070] The above embodiments are only used to illustrate the present invention, but not to limit it.

[0071] Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the above embodiments or make equivalent substitutions for some of the technical features therein; and these modifications or substitutions do not deviate the essence of the corresponding technical solutions from the spirit and scope of the present invention.

Claims

1. A tank transport vehicle, comprising a vehicle frame (1) and a plurality of shifting wheel units (2); Features: The shift wheel units (2) are mounted at the bottom of the frame (1) in a rectangular array of at least two columns and at least two rows along the longitudinal direction of travel of the frame (1); Each shift wheel unit (2) is composed of a wheel frame (21) and two groups of rollers (22); the wheel frame (21) is hingedly mounted at the bottom of the vehicle frame (1) at the longitudinal middle portion thereof via a wheel frame shaft (23); the two groups of rollers (22) are mounted at longitudinal ends of the wheel frame (21) and at longitudinal sides of the wheel frame shaft (23) at a rotatable structural spacing; and the rotation direction of the rollers (22) is along the longitudinal direction of travel of the vehicle frame (1); The wheel frame (21) is composed of two end plates (211) arranged at a distance and a connecting rib (212) connected between the two end plates (211), forming an I-shaped structure in the transverse direction of the wheel frame (21); The contour structures of the two end plates (211) are respectively elliptical, and the centers of the two end plates (211) are respectively formed with axle holes (213) for inserting the same wheel frame axle (23); In the longitudinal direction of the wheel frame (21), two shaft holes (214) for inserting the same roller shaft (24) are respectively formed between the two end plates (211) at each end, and the two shaft holes (214) at both ends and the shaft hole (213) at the center are located on the long axis of the elliptical end plate (211); The corresponding roller shafts (24) of the two groups of rollers (22) are rotatably mounted in corresponding second shaft holes (214) at both longitudinal ends of the wheel frame (21), and the rotational tracks of the assembled rollers (22) extend out of the lowest position of the bottom profile of the wheel frame (21).

2. The tank transport vehicle according to claim 1, characterized in that: The bottom profile structure of the elliptical end plate (211) has the following matching relationship: The virtual connecting surface at the bottom end of the minor axis direction, from the contour edge corresponding to the vertical direction of the horizontal plane at the bottom side at the center of the second through-axis hole (214), forms an angle (a) of 9 to 13 degrees with the horizontal plane at the bottom end of the minor axis direction.

3. The tank transport vehicle according to claim 1, characterized in that: The wheel frame (21) includes two connecting ribs (212) arranged at intervals along the short axis direction of the end plate (211), and the two connecting ribs (212) are located at the top and bottom sides of the first shaft through hole (213).

4. The tank transport vehicle according to claim 1, characterized in that: The roller (22) is a nylon wheel structure.

5. The tank transport vehicle according to claim 1, characterized in that: The plurality of shift wheel units (2) at the bottom of the frame (1) are divided into a group with two shift wheel units (2) arranged adjacent to each other in the transverse direction of the frame (1); Two shifting wheel units (2) of the same group are hingedly assembled in the same wheel set frame (3) via corresponding wheel frame shafts (23); the wheel set frame (3) is assembled at the bottom of the vehicle frame (1).

6. The tank transport vehicle according to claim 5, characterized in that: The wheel set frame (3) is composed of a side support plate (31), a middle support plate (32), a middle support plate (33), a side support plate (34) arranged in sequence, and two positioning plates (35) which are connected in series at both ends of the support plates to form a whole, forming a frame structure, each support plate is arranged along the horizontal spacing of the frame (1), and the two positioning plates (35) are arranged along the longitudinal spacing of the frame (1); In the lateral direction of travel of the vehicle frame (1), the interior of the wheel assembly frame (3) is divided into relatively independent shift wheel assembly chamber 1 (36), a threading chamber (37) and a shift wheel assembly chamber 2 (38) in sequence by the respective support plates; One shift wheel unit (2) in the same group is hingedly assembled between a side support plate (31) and a middle support plate (32) on both sides of the shift wheel assembly cavity (1) via a corresponding wheel frame shaft (23); another shift wheel unit (2) in the same group is hingedly assembled between a side support plate (34) and a middle support plate (33) on both sides of the shift wheel assembly cavity (2) via a corresponding wheel frame shaft (23); and the bottom side of the wheel frame (21) of the shift wheel unit (2) extends out of the bottom side of the wheel assembly frame (3); The insertion cavity (37) is formed with three axle holes (39) for inserting the same insertion axle (4) between the two ends along the longitudinal direction of the frame (1), and the wheelset frame (3) is assembled at the bottom of the frame (1) through the insertion axle (4) inserted through the three axle holes (39) and passing through the insertion cavity (37).

7. The tank transport vehicle according to claim 6, characterized in that: The bottom of the vehicle frame (1) is formed with a wheel assembly cavity (11) in a concave structure for assembling each wheel assembly frame (3); The wheel set frame (3) is assembled in a wheel set assembly cavity (11) corresponding to the bottom of the vehicle frame (1) via the assembly shaft (4).

8. The tank transport vehicle according to claim 7, characterized in that: In the longitudinal direction of travel of the frame (1), each wheel assembly frame (3) in the same row is assembled at the bottom of the frame (1) via the same threading shaft (4).

9. The tank transport vehicle according to claim 5, 6, 7 or 8, characterized in that: The bottom of the vehicle frame (1) is equipped with six wheel assembly frames (3) in a rectangular array of two columns and three rows along the longitudinal direction of travel.

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