Track chassis and engineering vehicle

Abstract

The utility model belongs to the technical field of engineering machinery, and particularly relates to a crawler chassis and an engineering vehicle. The vehicle comprises a vehicle frame, track frames and telescopic supporting assemblies, the track frames are telescopically arranged on the two sides of the vehicle frame, the telescopic supporting assemblies are used for lifting the vehicle frame and adjusting the distance between the track frames on the two sides of the vehicle frame, each telescopic supporting assembly comprises a telescopic unit and a positioning supporting leg, the telescopic units and the positioning supporting legs are movably fixed, and the angle between the telescopic units and the positioning supporting legs is adjustable. The positioning supporting legs are rotationally connected with the frame, and fixing pieces used for fixing the telescopic units are arranged on the track frames. The orientation of the telescopic unit can be conveniently changed by adjusting the angle between the telescopic unit and the positioning supporting leg, so that the telescopic supporting assembly can be used for supporting the frame, the distance between the track frames can be changed, and the track gauge can be conveniently adjusted. The telescopic supporting assemblies are symmetrically arranged along the vehicle frame and the track frame, stretching and retracting are more stable, the stability of the structure is enhanced, and unilateral stretching and retracting adjustment can be conducted.

Description

Technical Field

[0001] This application belongs to the technical field of construction machinery, and particularly relates to a crawler chassis and an engineering vehicle. Background Art

[0002] Crawler chassis are widely used in various construction machinery, such as crawler cranes, excavators, rotary drilling rigs, etc. Under different construction conditions, the crawler chassis often need to switch between different gauge states, such as wide gauge, medium gauge, and narrow gauge. Generally, when the gauge is wide, the stability of the whole machine is good, and when the gauge is narrow, it is convenient for transportation and passing through narrow spaces; at the same time, when the main machine is overweight during transportation, it is necessary to support the frame and disassemble the track beam for transportation; currently, two types of cylinders are generally arranged on the crawler chassis: outrigger cylinders and track telescopic cylinders, to respectively realize the functions of supporting the frame and adjusting the gauge. As Figure 1 shown, the outrigger cylinders 1 on the crawler chassis extend to support the frame for track disassembly; the telescopic movement of the track telescopic cylinder 2 can realize the change of the track gauge, from wide gauge to narrow gauge, narrow gauge to wide gauge, etc.; generally, four outrigger cylinders are symmetrically arranged, and one or two track telescopic cylinders are arranged.

[0003] The track telescopic cylinder and the outrigger cylinder are generally used during transfer transportation and are hardly used during normal operation. Therefore, the utilization rate is very low, and the arrangement of two types of cylinders at the same time results in high costs and difficulties in production and manufacturing. Summary of the Invention

[0004] In view of the above problems existing in the prior art, this application provides a crawler chassis and an engineering vehicle, which can reduce the number of cylinders and costs.

[0005] To achieve the above object, the technical solutions provided by this application are as follows:

[0006] In a first aspect, this application provides a crawler chassis, including a frame, a track frame, and a telescopic support assembly. The track frame is telescopically arranged on both sides of the frame. The telescopic support assembly is used for lifting the frame and adjusting the distance between the track frames on both sides of the frame. The telescopic support assembly includes a telescopic unit and a positioning outrigger. The telescopic unit and the positioning outrigger are movably fixed and the angle is adjustable. The positioning outrigger is rotatably connected to the frame, and a fixing member for fixing the telescopic unit is arranged on the track frame.

[0007] Optionally, two groups of insertion holes are provided on the positioning outrigger, corresponding jacks are provided on the telescopic unit, and positioning pins are inserted into the jacks and the insertion holes.

[0008] Optionally, one of the positioning pins between the positioning outrigger and the telescopic unit is detachable, and the telescopic unit can rotate around the other positioning pin.

[0009] Optionally, a positioning block is provided on the positioning outrigger, and the end of the telescopic unit is detachably fixed to the positioning block through a pin shaft.

[0010] Optionally, a mounting seat is provided on the vehicle frame, and the positioning leg is connected to the mounting seat through a rotating shaft.

[0011] Optionally, two positioning holes are provided on the mounting seat, and through holes are formed on the positioning leg, and the positioning holes and the through holes are locked by a pin rod.

[0012] Optionally, a fixed seat is further included, and the telescopic unit is detachably arranged on the fixed seat.

[0013] Optionally, the telescopic unit is connected to the fixed seat through a first locking pin.

[0014] Optionally, four groups of telescopic support assemblies are provided, and the four groups of telescopic support assemblies are symmetrically arranged on the vehicle frame.

[0015] In a second aspect, the present application further provides an engineering vehicle, including the above-mentioned crawler chassis.

[0016] Compared with the prior art, the present application has at least the following beneficial effects:

[0017] Through the angle adjustment between the telescopic unit and the positioning leg, the present application can conveniently change the orientation of the telescopic unit, so that the telescopic support assembly can be used to support the vehicle frame and change the distance between the crawler frames, facilitating the gauge adjustment. The telescopic support assemblies are symmetrically arranged along the vehicle frame and the crawler frames, and the telescopic movement is more stable, enhancing the structural stability, and the unilateral telescopic adjustment can be performed, and various gauge forms such as wide gauge, narrow gauge, unilateral wide gauge, and unilateral narrow gauge can be realized. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 It is a schematic structural diagram of a crawler chassis in the prior art;

[0020] Figure 2 It is a schematic structural diagram of a crawler chassis according to Embodiment 2 of the present application;

[0021] Figure 3 For Figure 2 The enlarged view of part A in;

[0022] Figure 4 It is a schematic diagram of the state of the crawler chassis when adjusting the distance between the two crawler frames in Embodiment 2 of the present application;

[0023] Description of the reference numerals:

[0024] 1. Outrigger cylinder; 2. Telescopic cylinder; 3. Frame; 31. Mounting seat; 311. Rotating shaft; 312. First positioning hole; 313. Second positioning hole; 4. Crawler frame; 5. Telescopic unit; 51. Positioning pin; 6. Positioning outrigger; 61. Positioning block; 8. Fixed seat. Detailed implementation manners

[0025] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way constitutes a limitation to the present application and its application or use. Embodiment 1

[0026] A crawler chassis includes a frame 3, a crawler frame 4, and a telescopic support assembly. The crawler frame 4 is telescopically arranged on both sides of the frame 3. The telescopic support assembly is used to lift the frame 3 and adjust the distance between the crawler frames 4 on both sides of the frame 3. The telescopic support assembly includes a telescopic unit 5 and a positioning outrigger 6. The telescopic unit 5 and the positioning outrigger 6 are movably fixed and the angle is adjustable. The positioning outrigger 6 is rotatably connected to the frame 3. A fixing member for fixing the telescopic unit 5 is provided on the crawler frame 4. Four groups of telescopic support assemblies are provided, and the four groups of telescopic support assemblies are symmetrically arranged on the frame 3, and the telescopic support assemblies are symmetrically arranged between the crawler frames 4.

[0027] After adjusting the telescopic unit 5 and the positioning outrigger 6 to be perpendicular and fixing them, the telescopic unit 5 can be extended to support the frame 3; when the gauge needs to be adjusted, the positioning outrigger 6 is rotated along the frame 3 until the positioning outrigger 6 is perpendicular to the crawler frames 4 on both sides. After adjusting the angle between the telescopic unit 5 and the positioning outrigger 6 and fixing them, the telescopic unit 5 can be fixed on the crawler frame 4 by using the fixing member. At this time, the telescopic unit 5 can be telescoped to adjust the distance between the two crawler frames 4.

[0028] Through the above design of the present application, the frame 3 can be supported and the distance between the crawler frames 4 can be changed, which is convenient for gauge adjustment. There is no need to additionally provide a crawler telescopic cylinder 2, the number of telescopic units 5 is reduced, and the manufacturing cost is lowered. Embodiment 2

[0029] As Figures 1-4As shown in the figure, the difference between this embodiment and Embodiment 1 is that it further includes a fixed seat 8. The telescopic unit 5 is detachably arranged on the fixed seat 8. When it is necessary to support the vehicle frame 3, the telescopic unit 5 can be fixed on the fixed seat 8. When it is necessary to adjust the distance between the crawler frames 4, the telescopic unit 5 can be removed from the fixed seat 8. In this application, the telescopic unit 5 is connected to the fixed seat 8 through a first locking pin to achieve locking. Unscrewing the first pin can remove the telescopic unit 5, which facilitates the disassembly and fixing between the two.

[0030] An installation seat 31 is provided on the vehicle frame 3. The positioning leg 6 is connected to the installation seat 31 through a rotating shaft 311. The rotating shaft 311 is in the vertical direction, and the positioning leg 6 can rotate around the rotating shaft 311.

[0031] Two positioning holes are provided on the installation seat 31, namely a first positioning hole 312 and a second positioning hole 313. A through hole is provided on the positioning leg 6, and the first positioning hole 312 or the second positioning hole 313 is locked with the through hole through a pin rod.

[0032] Two groups of insertion holes are provided on the positioning leg 6, and the two groups of insertion holes are arranged in the vertical direction. Corresponding insertion holes are provided on the telescopic unit 5. A positioning pin 51 is inserted into the insertion hole and the insertion hole. When both positioning pins 51 are inserted into the insertion hole and the insertion hole, the telescopic unit 5 is in the vertical direction and the positioning leg 6 is in the horizontal direction. At this time, the pin rod locks the first positioning hole 312 with the through hole, so that the telescopic unit 5 can be extended to support the vehicle frame 3.

[0033] The positioning pin 51 is in the horizontal direction. One of the positioning pins 51 between the positioning leg 6 and the telescopic unit 5 is detachable, and the telescopic unit 5 can rotate around the other positioning pin 51. A positioning block 61 is provided on the positioning leg 6, and the end of the telescopic unit 5 is detachably fixed to the positioning block 61 through a pin shaft.

[0034] After removing the telescopic unit 5 from the fixed seat 8 and removing one positioning pin 51, the positioning leg 6 can rotate along the other positioning pin 51. After rotating the positioning leg 6 until the end of the telescopic unit 5 contacts the positioning block 61, the telescopic unit 5 is fixed to the positioning block 61 by using a pin shaft, and the angle adjustment between the leg and the telescopic unit 5 can be realized. Remove the pin shaft from the first positioning hole 312, rotate the positioning leg 6 along the rotating shaft 311. After the through hole is aligned with the second positioning hole 313, lock it with a pin shaft, and then use a fixing member to fix one end of the telescopic unit 5 away from the positioning leg 6 to the crawler frame 4. At this time, the telescopic unit 5 can be telescoped to adjust the distance between the two crawler frames 4. The fixing member can adopt a combination of a pin shaft and a screw hole. The telescopic support assembly is symmetrically arranged along the vehicle frame 3 and the crawler frame 4, and the telescoping is more stable, enhancing the structural stability. It can be adjusted unilaterally, and can realize various gauge forms such as wide gauge, narrow gauge, single-sided wide gauge, and single-sided narrow gauge.

[0035] In this application, the telescopic unit 5 can be any structure that can achieve telescoping. In this embodiment, the telescopic unit 5 uses a telescopic cylinder.

[0036] This application also provides an engineering vehicle, including the above-mentioned crawler chassis.

[0037] In the description of this application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood through specific situations.

[0038] The above are only the preferred embodiments of this application. It should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of this application, several improvements and deformations can be made, and these improvements and deformations should also be regarded as the protection scope of this application.

Claims

1. A crawler chassis, characterized in that, It includes a vehicle frame, a crawler frame and a telescopic support assembly. The crawler frame is telescopically arranged on both sides of the vehicle frame. The telescopic support assembly is used for lifting the vehicle frame and adjusting the distance between the crawler frames on both sides of the vehicle frame. The telescopic support assembly includes a telescopic unit and a positioning leg. The telescopic unit is movably fixed to the positioning leg and the angle is adjustable. The positioning leg is rotatably connected to the vehicle frame. A fixing member for fixing the telescopic unit is arranged on the crawler frame.

2. The crawler chassis according to claim 1, characterized in that Two groups of insertion holes are provided on the positioning leg, corresponding insertion holes are provided on the telescopic unit, and a positioning pin is inserted into the insertion hole and the insertion hole.

3. The crawler chassis according to claim 2, characterized in that, One of the positioning pins between the positioning leg and the telescopic unit is detachable, and the telescopic unit can rotate around the other positioning pin.

4. The crawler chassis according to claim 3, characterized in that, A positioning block is provided on the positioning leg, and the end of the telescopic unit is detachably fixed to the positioning block through a pin shaft.

5. The crawler chassis according to claim 1, characterized in that, An installation seat is provided on the vehicle frame, and the positioning leg is connected to the installation seat through a rotating shaft.

6. The crawler chassis according to claim 5, characterized in that, Two positioning holes are provided on the installation seat, and a through hole is provided on the positioning leg. The positioning hole and the through hole are locked through a pin rod.

7. The crawler chassis according to claim 1, characterized in that, It also includes a fixing seat, and the telescopic unit is detachably arranged on the fixing seat.

8. The crawler chassis according to claim 7, wherein The telescopic unit is connected to the fixing seat through a first locking pin.

9. The crawler chassis according to claim 1, characterized in that, Four groups of telescopic support assemblies are provided, and the four groups of telescopic support assemblies are symmetrically arranged on the vehicle frame.

10. An engineering vehicle, characterized in that, It includes the crawler chassis according to any one of claims 1-9.

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