Gauge-adjustable differential steering crawler tractor

Abstract

The differential steering crawler tractor comprises a transmission case, a chassis rack, two wheel train supports and two transmission chain wheels, the two wheel train supports are oppositely installed below the two sides of the chassis rack and detachably connected with the two sides of the chassis rack respectively, and the distance between the two wheel train supports is adjustable; the transmission case is installed above the chassis rack, the two transmission chain wheels are oppositely distributed on the two sides of the transmission case and detachably connected with the transmission case, and the distance between the two transmission chain wheels is adjustable. The utility model has the beneficial effects that the structure is simple, the design is reasonable, the 360-degree steering in situ can be realized, the turning is flexible, and the radius of a steering circle is small; in addition, one differential steering crawler tractor can achieve various track gauges, and different operation requirements are met. And meanwhile, one machine has multiple purposes, and the total investment cost of a user is low.

Description

Technical Field

[0001] The utility model relates to the technical field of crawler tractors, and particularly relates to a differential steering crawler tractor with adjustable track gauge. Background Art

[0002] At present, in the agricultural machinery industry, a single machine is required to be used for multiple purposes, and the requirements for tractors with multiple purposes and multiple working conditions are getting higher and higher. Especially in the southern tobacco-rice rotation area, due to different tobacco varieties and ridge distances, a differential steering crawler tractor needs different track gauges when ridging in tobacco fields. Moreover, considering that some differential steering crawler tractors are used not only for ridging in tobacco fields but also for some paddy field operations (the track gauge for paddy field operations is generally wider), the demand for track gauges is more diverse. The track gauges of existing differential steering crawler tractors are fixed. If a user wants to realize multiple working condition operations, they can only purchase multiple crawler tractors for different working condition operations, thus increasing the user's usage cost.

[0003] In view of this problem, it is necessary to invent a differential steering crawler tractor with adjustable track gauge to realize the operation requirements of different working conditions by using the technology of adjustable track gauge. Summary of the Utility Model

[0004] The utility model provides a differential steering crawler tractor with adjustable track gauge, aiming to solve the problems in the prior art.

[0005] The technical solution of the utility model to solve the above technical problems is as follows:

[0006] A differential steering crawler tractor with adjustable track gauge includes a transmission case, a chassis frame, two gear train brackets and two drive sprockets. The two gear train brackets are relatively installed below both sides of the chassis frame, and are detachably connected to both sides of the chassis frame respectively, and the distance between the two gear train brackets is adjustable;

[0007] The transmission case is installed above the chassis frame, and the two drive sprockets are relatively distributed on both sides of the transmission case, and are detachably connected to the transmission case respectively, and the distance between the two drive sprockets is adjustable.

[0008] The beneficial effect of the utility model is that during the assembly process, the distance between the two gear train brackets is adjustable, and at the same time, the distance between the two drive sprockets is adjustable to meet different operation requirements, and it is very convenient to use.

[0009] The structure of the utility model is simple and reasonably designed. It can realize a 360° in-situ turn, with flexible turning and a small turning circle radius. In addition, a differential steering crawler tractor can achieve multiple track gauges to meet different operation requirements. At the same time, it can be used for multiple purposes, and the total investment cost of users is low.

[0010] On the basis of the above technical solutions, the present utility model can also be improved as follows.

[0011] Further, the two driving sprockets are respectively eccentric sprockets, and the two eccentric sprockets are respectively rotatably connected to both sides of the transmission case through sprocket shafts.

[0012] The beneficial effect of adopting the above further solution is that the structure is simple and the design is reasonable. By using the special structure of the eccentric sprockets and the forward and reverse installation of the two eccentric sprockets, the adjustment of the distance between the two sprockets can be realized to meet different operation requirements.

[0013] Further, it further includes two wheelbase adjustment pads, and the two wheelbase adjustment pads are relatively distributed on one side where the two driving sprockets are close to each other.

[0014] The beneficial effect of adopting the above further solution is that during assembly, by using the positional relationship between the two wheelbase adjustment pads and the two eccentric sprockets and the forward and reverse installation of the two eccentric sprockets, the adjustment of the distance between the two sprockets can be realized to meet different operation requirements.

[0015] Further, it further includes two wheelbase adjustment pads, and the two wheelbase adjustment pads are relatively distributed on one side where the two driving sprockets are far from each other.

[0016] The beneficial effect of adopting the above further solution is that during assembly, by using the positional relationship between the two wheelbase adjustment pads and the two eccentric sprockets and the forward and reverse installation of the two eccentric sprockets, the adjustment of the distance between the two sprockets can be realized to meet different operation requirements.

[0017] Further, the two wheelbase adjustment pads are respectively in an annular structure, and a plurality of connecting screw holes for installing bolts are evenly spaced along their circumferences.

[0018] The beneficial effect of adopting the above further solution is that the structure is simple and the design is reasonable. By using the screw holes on the wheelbase adjustment pads, the quick assembly of the wheelbase adjustment pads can be realized, and the assembly is convenient.

[0019] Further, on both sides of both ends of the chassis frame, two pairs of upper fixing plates are respectively horizontally and fixedly installed relatively, and on both ends of the two wheel train brackets, two pairs of lower fixing plates are respectively horizontally and fixedly installed relatively, and the two pairs of lower fixing plates are detachably connected to the two pairs of upper fixing plates respectively.

[0020] The beneficial effect of adopting the above further solution is that the structure is simple and the design is reasonable. By using the different connection positions between the two pairs of upper fixing plates and the two pairs of lower fixing plates, the adjustment of the distance between the two wheel train brackets can be realized to meet different operation requirements.

[0021] Further, the two pairs of the upper fixing plates and / or the two pairs of the lower fixing plates are respectively in a rectangular plate-like structure.

[0022] The beneficial effect of adopting the above further scheme is that the shapes of the upper fixing plate and the lower fixing plate are reasonably designed, which is convenient for assembly.

[0023] Further, two pairs of supports are respectively fixedly installed at both ends of the two gear train brackets relatively, and the two pairs of the lower fixing plates are respectively horizontally and fixedly installed on the two pairs of the supports.

[0024] The beneficial effect of adopting the above further scheme is that the structure is simple and reasonably designed. By using the two pairs of supports, it is convenient to assemble the two pairs of the lower fixing plates, and the assembly is convenient.

[0025] Further, a plurality of pairs of lower screw holes penetrating up and down are respectively arranged at both ends of each of the lower fixing plates relatively, at least one pair of upper screw holes are respectively arranged at both ends of each of the upper fixing plates relatively, and each pair of the upper screw holes can communicate with any one pair of the lower screw holes, and the corresponding upper screw holes and the lower screw holes are connected by bolts.

[0026] The beneficial effect of adopting the above further scheme is that the structure is simple and reasonably designed. By using the upper screw holes on the two pairs of the upper fixing plates to communicate with any one pair of the lower screw holes on the two pairs of the lower fixing plates, the distance between the two gear train brackets can be adjusted to meet different operation requirements.

[0027] Further, the sizes of the two pairs of the upper fixing plates are smaller than those of the two pairs of the lower fixing plates.

[0028] The beneficial effect of adopting the above further scheme is that the structure is simple and reasonably designed. It can not only meet the assembly requirements, but also save materials to a certain extent, and the cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0030] Figure 2 is a schematic diagram of a partial structure of the present invention;

[0031] Figure 3 is an assembly drawing of the upper fixing plate and the lower fixing plate of the present invention;

[0032] Figure 4 is a schematic diagram of the structure of the first wheelbase of the present invention;

[0033] Figure 5 is a schematic diagram of the structure of the second wheelbase of the present invention;

[0034] Figure 6 is a schematic diagram of the structure of the third wheelbase of the present invention.

[0035] In the attached drawings, the list of components represented by each reference numeral is as follows:

[0036] 1. Transmission box; 2. Chassis frame; 3. Wheel system support; 4. Transmission sprocket; 5. Wheelbase adjustment pad; 6. Connecting screw hole; 7. Upper fixing plate; 8. Lower fixing plate; 9. Support; 10. Lower screw hole; 11. Bolt. Detailed implementation manners

[0037] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments may be combined with each other.

[0038] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the attached drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0039] In the description of the present invention, it should be noted that, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

[0040] The present invention will be described in detail below with reference to the attached drawings and in combination with embodiments.

[0041] Embodiment 1

[0042] As Figures 1 to 6 shown, this embodiment provides a differential steering crawler tractor with adjustable gauge, including a transmission box 1, a chassis frame 2, two wheel system supports 3 and two transmission sprockets 4. The two wheel system supports 3 are relatively installed below both sides of the chassis frame 2, are detachably connected to both sides of the chassis frame 2 respectively, and the distance between the two wheel system supports 3 is adjustable;

[0043] The transmission case 1 is installed above the chassis frame 2. The two transmission sprockets 4 are distributed oppositely on both sides of the transmission case 1, and are detachably connected to the transmission case 1 respectively, and the distance between the two transmission sprockets 4 is adjustable.

[0044] During the assembly process, the distance between the two gear train brackets is adjustable, and at the same time, the distance between the two transmission sprockets is adjustable to meet different operation requirements, which is very convenient to use.

[0045] Based on the above solution, the power transmission system of this tractor adopts the existing technology to realize operations such as the driving and turning of the whole tractor.

[0046] The structure of this embodiment is simple and reasonably designed. It can achieve a 360° in-situ turn, with flexible turning and a small turning circle radius. In addition, a differential steering crawler tractor can achieve multiple track gauges to meet different operation requirements. At the same time, it has multiple functions, and the total investment cost of users is low.

[0047] Embodiment 2

[0048] On the basis of Embodiment 1, in this embodiment, the two transmission sprockets 4 are respectively eccentric sprockets, and the two eccentric sprockets are respectively rotationally connected to both sides of the transmission case 1 through sprocket shafts.

[0049] This solution has a simple structure and is reasonably designed. By using the special structure of the eccentric sprockets and the forward and reverse installations of the two eccentric sprockets, the adjustment of the distance between the two sprockets can be realized to meet different operation requirements.

[0050] Embodiment 3

[0051] On the basis of Embodiment 2, this embodiment further includes two wheelbase adjustment pads 5, and the two wheelbase adjustment pads 5 are distributed oppositely on one side where the two transmission sprockets 4 are close to each other.

[0052] During assembly, by using the positional relationship between the two wheelbase adjustment pads 5 and the two eccentric sprockets and the forward and reverse installations of the two eccentric sprockets, the adjustment of the distance between the two sprockets can be realized to meet different operation requirements.

[0053] Embodiment 4

[0054] On the basis of Embodiment 2, this embodiment further includes two wheelbase adjustment pads 5, and the two wheelbase adjustment pads 5 are distributed oppositely on one side where the two transmission sprockets 4 are far from each other.

[0055] During assembly, by using the positional relationship between the two wheelbase adjustment pads 5 and the two eccentric sprockets and the forward and reverse installations of the two eccentric sprockets, the adjustment of the distance between the two sprockets can be realized to meet different operation requirements.

[0056] The above-mentioned Embodiment 3 and Embodiment 4 are parallel solutions.

[0057] Embodiment 5

[0058] On the basis of any one of Embodiment 3 or Embodiment 4, in this embodiment, the two wheelbase adjustment pads 5 are respectively in an annular structure, and a plurality of connecting screw holes 6 for installing bolts are evenly spaced along the circumferential direction thereof.

[0059] This solution has a simple structure and reasonable design. The connecting screw holes 6 on the wheelbase adjustment pad 5 can be used to realize the rapid assembly of the wheelbase adjustment pad 5, and the assembly is convenient.

[0060] Embodiment 6

[0061] On the basis of the above-mentioned embodiments, in this embodiment, two pairs of upper fixing plates 7 are respectively horizontally and fixedly installed on both sides of both ends of the chassis frame 2, and two pairs of lower fixing plates 8 are respectively horizontally and fixedly installed on both ends of the two wheel train brackets 3, and the two pairs of lower fixing plates 8 are detachably connected to the two pairs of upper fixing plates 7 respectively.

[0062] This solution has a simple structure and reasonable design. By using the different connection positions between the two pairs of upper fixing plates 7 and the two pairs of lower fixing plates 8, the adjustment of the distance between the two wheel train brackets 3 can be realized to meet different operation requirements.

[0063] Embodiment 7

[0064] On the basis of Embodiment 6, in this embodiment, the two pairs of upper fixing plates 7 and / or the two pairs of lower fixing plates 8 are respectively in a rectangular plate structure.

[0065] The shapes of the upper fixing plate 7 and the lower fixing plate 8 are reasonably designed and convenient for assembly.

[0066] Alternatively, the above-mentioned upper fixing plate 7 and lower fixing plate 8 can also adopt other suitable geometric shapes, such as circular plates.

[0067] Embodiment 8

[0068] On the basis of any one of Embodiments 6 to 7, in this embodiment, two pairs of supports 9 are respectively fixedly installed on both ends of the two wheel train brackets 3, and the two pairs of lower fixing plates 8 are respectively horizontally fixedly installed on the two pairs of supports 9.

[0069] This solution has a simple structure and reasonable design. The two pairs of supports 9 are used to facilitate the assembly of the two pairs of lower fixing plates 8, and the assembly is convenient.

[0070] Preferably, in this embodiment, each of the above-mentioned supports 9 includes a plurality of fixing rods, and both ends of the plurality of fixing rods are fixedly connected to the corresponding lower fixing plate 8 and the wheel train bracket 3 respectively.

[0071] Example 9

[0072] On the basis of any one of Embodiment 6 to Embodiment 7, in this embodiment, at both ends of each of the lower fixing plates 8, a plurality of pairs of lower screw holes 10 penetrating up and down are oppositely provided. At both ends of each of the upper fixing plates 7, at least one pair of upper screw holes are oppositely provided. Each pair of the upper screw holes can communicate with any one pair of the lower screw holes 10, and the corresponding upper screw holes and the lower screw holes 10 are connected by bolts 11.

[0073] This solution has a simple structure and reasonable design. By connecting the upper screw holes on the two pairs of upper fixing plates 7 with any one pair of lower screw holes 10 on the two pairs of lower fixing plates 8, the adjustment of the distance between the two gear train brackets 3 is realized to meet different operation requirements.

[0074] Preferably, in this embodiment, at both ends of each upper fixing plate 7, two pairs of upper screw holes are oppositely provided, and bolts 11 are respectively installed in the two pairs of upper screw holes. The design is reasonable to ensure the stability of the assembly of the upper fixing plate 7 and the lower fixing plate 8.

[0075] Example 10

[0076] On the basis of Example 9, in this embodiment, the sizes of the two pairs of upper fixing plates 7 are smaller than the sizes of the two pairs of lower fixing plates 8.

[0077] This solution has a simple structure and reasonable design. It can not only meet the assembly requirements, but also save materials to a certain extent and has a low cost.

[0078] The assembly principle of the present utility model is as follows:

[0079] On the one hand, by using the cooperation between the two upper screw holes on the two pairs of upper fixing plates 7 and two different lower screw holes 10 on the two pairs of lower fixing plates 8, the adjustment of the distance between the two gear train brackets 3 is realized;

[0080] On the other hand, by using the forward installation and reverse installation of the two drive sprockets 4 and the different distribution positions of the two wheel pitch adjustment pads 5 and the two drive sprockets 4, the adjustment of the distance between the two drive sprockets 4 is realized (refer to Figures 4 to 6 ).

[0081] Figure 4 and Figure 5 in which the two wheel pitch adjustment pads 5 are both installed on the outer sides of the two drive sprockets 4, but the assembly directions (forward installation and reverse installation) of the two drive sprockets 4 are different; Figure 6 in which the two wheel pitch adjustment pads 5 are installed on the inner sides of the two drive sprockets 4. Among them, the Figures 4 to 6 L in only represents the wheel pitch between the two drive sprockets 4 and has no other substantial meaning.

[0082] The utility model provides a differential steering crawler tractor with adjustable track gauge, which can achieve multiple track gauges with one differential steering crawler tractor, so as to meet the requirements of different working conditions for track gauge.

[0083] The utility model provides a new type of differential steering crawler tractor with adjustable track gauge and capable of achieving 360° in-situ turning, enabling one differential steering crawler tractor to take into account the working conditions of different track gauges and ultimately realizing multi-purpose of one machine.

[0084] Compared with the prior art, the utility model adopts the double-power confluence technology of planetary gear train for differential steering, and can achieve functions such as stepless control and 360° in-situ turning by combining a hydraulic pump and a hydraulic motor. The track gauge adjustment mechanism enables one crawler tractor to adjust multiple track gauges, so as to adapt to different working conditions, and it is an ideal differential steering crawler tractor.

[0085] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-mentioned exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0086] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0087] The above are only the preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A differential steering crawler tractor with adjustable track gauge, characterized in that: It comprises a transmission box (1), a chassis frame (2), two wheel train brackets (3) and two transmission sprockets (4), wherein the two wheel train brackets (3) are relatively mounted below the two sides of the chassis frame (2), are detachably connected to the two sides of the chassis frame (2), and the distance between the two wheel train brackets (3) is adjustable; The transmission box (1) is installed above the chassis frame (2), and the two transmission sprockets (4) are relatively distributed on both sides of the transmission box (1). They are respectively detachably connected to the transmission box (1), and the distance between the two transmission sprockets (4) is adjustable.

2. The differential steering crawler tractor with adjustable track gauge according to claim 1, characterized in that: The two transmission sprockets (4) are respectively eccentric sprockets, and the two eccentric sprockets are rotationally connected to the two sides of the transmission box (1) through sprocket shafts.

3. The differential steering crawler tractor with adjustable track gauge according to claim 2, characterized in that: It also comprises two wheelbase adjustment pads (5), wherein the two wheelbase adjustment pads (5) are relatively distributed on the sides of the two transmission sprockets (4) close to each other.

4. The differential steering crawler tractor with adjustable track gauge according to claim 2, characterized in that: It also comprises two wheelbase adjustment pads (5), wherein the two wheelbase adjustment pads (5) are relatively distributed on the sides of the two transmission sprockets (4) that are away from each other.

5. The differential steering crawler tractor with adjustable track gauge according to claim 3 or 4, characterized in that: The two wheelbase adjustment pads (5) are respectively in the form of annular structures, and a plurality of connecting screw holes (6) for installing bolts are evenly spaced along their circumference.

6. The differential steering crawler tractor with adjustable track gauge according to any one of claims 1 to 4, characterized in that: Two pairs of upper fixing plates (7) are fixedly installed relatively horizontally on both sides of the two ends of the chassis frame (2), and two pairs of lower fixing plates (8) are fixedly installed relatively horizontally on both ends of the two wheel train brackets (3), and the two pairs of lower fixing plates (8) are detachably connected to the two pairs of upper fixing plates (7).

7. The differential steering crawler tractor with adjustable track gauge according to claim 6, characterized in that: The two pairs of upper fixing plates (7) and / or the two pairs of lower fixing plates (8) are respectively rectangular plate-shaped structures.

8. The differential steering crawler tractor with adjustable track gauge according to claim 6, characterized in that: Two pairs of supports (9) are relatively fixedly installed at both ends of the two wheel train brackets (3), and two pairs of lower fixing plates (8) are horizontally fixedly installed on the two pairs of supports (9).

9. The differential steering crawler tractor with adjustable track gauge according to claim 6, characterized in that: A plurality of pairs of lower screw holes (10) penetrating upward and downward are disposed at opposite ends of each lower fixing plate (8), and at least one pair of upper screw holes are disposed at opposite ends of each upper fixing plate (7). Each pair of upper screw holes can be connected to any pair of lower screw holes (10), and bolts (11) are used to connect the corresponding upper screw holes and lower screw holes (10).

10. The differential steering crawler tractor with adjustable track gauge according to claim 9, characterized in that: The dimensions of the two pairs of upper fixing plates (7) are smaller than the dimensions of the two pairs of lower fixing plates (8).

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