Telescopic walking frame of excavator

Abstract

The telescopic walking frame of the excavator comprises a bottom frame, the bottom frame comprises a bottom frame body and two hollow guide grooves, and the two guide grooves are formed in the two opposite ends of the bottom frame body and extend in the first direction; a left track beam frame and a right track beam frame which extend in the second direction are arranged at the two opposite ends of the bottom frame in the first direction correspondingly, the first direction and the second direction are located on the same horizontal plane and are arranged perpendicularly, and the left track beam frame and the right track beam frame face the bottom frame correspondingly and are provided with two left guide rails and two right guide rails which extend in the first direction. The two left guide rails and the two right guide rails are correspondingly inserted into the two guide grooves in a sliding manner respectively; an adjusting structure is arranged at the bottom of the bottom frame, rotatably and upwards penetrates into the guide groove and is close to and abuts against the outer wall of the bottom of the corresponding left guide rail or right guide rail. The walking frame is prevented from shaking up and down on an uneven road surface by adjusting the gap, so that the stability of the walking frame is guaranteed, the advancing path of the excavator is prevented from deviating, and the service life of the walking frame is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of excavators, in particular to a telescopic traveling frame of an excavator. Background Art

[0002] In recent years, the development of construction machinery has been relatively rapid, and excavators have become one of the most important construction machinery in engineering construction. As an essential part of the excavator, the traveling frame is related to the performance of the excavator. Therefore, the function of the traveling frame is also very important.

[0003] The traveling frame generally consists of an underframe and left and right crawler beams mounted on either side of the underframe. In traditional excavator traveling frame structures, the left and right crawler beams are welded and fixed to the left and right sides of the underframe to form an integral crawler excavator traveling frame. This integral welding method makes it impossible to adjust the distance between the underframe and the left and right crawler beams, limiting the excavator's maneuverability and stability during travel. It is also impossible to separate the underframe and the left and right crawler beams, making it impossible for the excavator to pass through narrow passages, limiting the excavator's use cases.

[0004] To this end, Chinese patent CN216713180U discloses a chassis telescopic mechanism for a small excavator, including a main board mechanism, a left telescopic mechanism, a right telescopic mechanism and two hydraulic cylinders. The left telescopic mechanism and the right telescopic mechanism are respectively located on one side of the main board mechanism, and the two hydraulic cylinders are horizontally arranged at the bottom of the main board mechanism, and the two hydraulic cylinders are arranged in opposite directions. One end of the two hydraulic cylinders is penetrated by a hydraulic shaft, and the ends of the two hydraulic shafts away from the hydraulic cylinders are respectively connected to the left telescopic mechanism and the right telescopic mechanism. The two hydraulic shafts can be controlled to extend and retract respectively by the two hydraulic cylinders, thereby driving the left telescopic mechanism and the right telescopic mechanism to move respectively, so that the mechanism can perform telescopic operations, thereby changing the body shape of the mechanism, so that the mechanism can adjust the width of the mechanism during actual operation.

[0005] Although the above scheme realizes the retractable function of the walking frame, there is a gap in the retractable structure. During long-term use, friction will cause the gap to increase, so that on uneven roads, the connection of the retractable structure will shake up and down, thereby affecting the stability of the walking frame, which in turn easily causes the excavator's travel path to deviate and affects the service life of the walking frame. Utility Model Content

[0006] In order to overcome at least one of the defects described in the above-mentioned prior art, the purpose of the present utility model is to provide a telescopic walking frame for an excavator, so as to avoid up and down shaking on uneven roads by adjusting the gap, thereby ensuring the stability of the walking frame, avoiding the deviation of the excavator's travel path, and improving the service life of the walking frame.

[0007] The technical solution adopted by the present invention to solve the problem is:

[0008] A telescopic traveling frame of an excavator, comprising:

[0009] The base frame includes a base frame body and two hollow guide grooves, wherein the two guide grooves are provided at opposite ends of the base frame body and both extend along the first direction;

[0010] A left crawler beam and a right crawler beam extending in the second direction are respectively provided at opposite ends of the chassis in the first direction, the first direction and the second direction are in the same horizontal plane and are arranged vertically, the left crawler beam and the right crawler beam are respectively provided with two left guide rails and two right guide rails extending in the first direction toward the chassis, the two left guide rails and the two right guide rails are respectively slidably inserted into the two guide grooves;

[0011] An adjusting structure is provided at the bottom of the chassis. The adjusting structure can be rotated to pass upward into the guide slot and abut against the bottom outer wall of the corresponding left guide rail or right guide rail.

[0012] As a preferred embodiment, in the present invention, the adjustment structure includes a hexagon socket screw, which is rotatably inserted upward into the guide slot and abuts against the bottom outer wall of the corresponding left guide rail or right guide rail.

[0013] As a preferred embodiment, in the present invention, the adjustment structure includes a limiting nut, which is fixed at the bottom of the guide groove. The hexagon socket screw can be rotatably inserted upward into the guide groove through the limiting nut and approaches the bottom outer wall of the corresponding left guide rail or right guide rail.

[0014] As a preferred embodiment, in the present invention, the side wall of the hexagon socket screw is provided with a thread structure adapted to the inner wall of the limiting nut.

[0015] As a preferred embodiment, in the present invention, a copper rod is provided on the top of the hexagon socket screw, and the hexagon socket screw can be rotated upward into the guide groove and push the copper rod close to the bottom outer wall of the corresponding left guide rail or right guide rail.

[0016] As a preferred embodiment, in the present invention, the underframe is connected to the left crawler beam frame and the right crawler beam frame through a hydraulic cylinder.

[0017] As a preferred embodiment, in the present invention, the hydraulic cylinder is fixed to the middle of the chassis, and the piston rod of the hydraulic cylinder is connected to the middle of the corresponding left crawler beam frame or the middle of the right crawler beam frame.

[0018] As a preferred embodiment, in the present invention, both the left crawler beam frame and the right crawler beam frame are provided with connecting parts corresponding to the piston rods of the hydraulic cylinders, and the piston rods of the hydraulic cylinders are connected to the corresponding connecting parts through pins.

[0019] As a preferred embodiment, in the present invention, both the left guide rail and the right guide rail are provided with slide grooves, and the chassis is provided with limiting bolts corresponding to the slide grooves. The limiting bolts penetrate into the guide grooves and are clamped in the corresponding slide grooves.

[0020] As a preferred embodiment, in the present invention, the chassis is provided with a limiting member corresponding to the limiting bolt, and the limiting bolt passes through the limiting member into the guide groove and is clamped in the corresponding sliding groove.

[0021] The telescopic traveling frame of the excavator provided by the utility model has the following beneficial effects:

[0022] By placing an adjustment structure proximally abutting the outer wall of the corresponding left or right guide rail, the vertical clearance of the left or right guide rail within the guide groove can be adjusted by rotating the adjustment structure to prevent up and down shaking on uneven roads, thereby ensuring the stability of the traveling frame, preventing deviation of the excavator's travel path, and extending the service life of the traveling frame. Furthermore, the provision of the adjustment structure requires lower manufacturing precision for the left and right guide rails, which helps reduce manufacturing costs and difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A bottom view of the telescopic traveling frame of the excavator of the present invention;

[0024] Figure 2 This is a cross-sectional view of the installation of the adjustment structure of the utility model.

[0025] The meanings of the reference numerals are as follows:

[0026] 1. Left track frame; 100. First left guide rail; 101. Second left guide rail; 2. Underframe; 201. First guide groove; 202. Second guide groove; 3. Right track frame; 300. First right guide rail; 301. Second right guide rail; 4. Hydraulic cylinder; 5. Adjustment structure; 501. Limit nut; 502. Hexagon socket screw; 503. Copper rod. DETAILED DESCRIPTION

[0027] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0028] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0030] See Figure 1 The utility model provides a telescopic walking frame of an excavator, including a base frame 2, the base frame 2 includes a base frame body and two hollow guide grooves, the two guide grooves are provided at opposite ends of the base frame body and both extend along a first direction.

[0031] Taking the direction of travel of an excavator as an example, the first direction is the left-right direction, and the two guide grooves are respectively the first guide groove 201 and the second guide groove 202, which are spaced apart from each other in the front-to-back direction. The front-to-back direction can be the second direction. The first guide groove 201 and the second guide groove 202 are hollow to form a sliding channel for achieving telescopic movement.

[0032] A left crawler beam 1 and a right crawler beam 3 extending along the second direction are respectively provided at opposite ends of the base frame 2 in the first direction. The first direction and the second direction are in the same horizontal plane and are arranged vertically. The left crawler beam 1 and the right crawler beam 3 are respectively provided with two left guide rails and two right guide rails extending along the first direction toward the base frame 2. The two left guide rails and the two right guide rails are respectively slidably inserted into the two guide grooves.

[0033] The two left guide rails are respectively a first left guide rail 100 and a second left guide rail 101, and the two right guide rails are respectively a first right guide rail 300 and a second right guide rail 301. The two left guide rails are inserted into the left ends of the two guide slots, and the two right guide rails are inserted into the right ends of the two guide slots. In addition, the left and right guide rails in the same guide slot slide synchronously toward or away from each other without interfering with each other. At the same time, the sliding movement in the two guide slots is synchronized, so that the left track beam 1 and the right track beam 3 synchronously move toward or away from each other, thereby achieving the telescopic properties of the walking frame.

[0034] See Figure 1 and Figure 2An adjustment structure 5 is provided at the bottom of the chassis 2. The adjustment structure 5 can be rotated upwardly to penetrate the guide slot and abut the bottom outer wall of the corresponding left or right guide rail. By positioning the adjustment structure 5 so that it abuts the outer wall of the corresponding left or right guide rail, the vertical clearance between the left or right guide rail within the guide slot can be adjusted by rotating the adjustment structure 5 to prevent up and down shaking on uneven roads. This ensures the stability of the traveling frame, prevents deviations in the excavator's travel path, and increases the service life of the traveling frame. Furthermore, the provision of the adjustment structure 5 reduces the manufacturing precision requirements for the left and right guide rails, thereby reducing manufacturing costs and difficulty.

[0035] Specifically, the adjustment structure 5 includes a hexagon socket screw 502 , which is rotatably inserted upward into the guide slot and abuts against the bottom outer wall of the corresponding left guide rail or right guide rail.

[0036] The bottom of the guide slot has a through-hole for a hexagon socket screw 502. The hexagon socket screw 502 is inserted through the through-hole into the guide slot and nearly abuts the bottom outer wall of the corresponding left or right guide rail. When the vertical clearance between the left or right guide rail and the guide slot increases, the hexagon socket screw 502 can be tightened until it abuts the bottom outer wall of the corresponding left or right guide rail, and then loosened 1 / 4 turn to achieve a near-abutment effect, thereby preventing the left or right guide rail from sliding within the guide slot.

[0037] Furthermore, the adjustment structure 5 includes a limiting nut 501, which is fixed at the bottom of the guide groove. The hexagon socket screw 502 is rotatably inserted upward into the guide groove through the limiting nut 501 and is close to abutting the bottom outer wall of the corresponding left guide rail or right guide rail.

[0038] A stop nut 501 is welded to the bottom of the guide slot and contains a threaded hole for a hexagon socket screw 502. The hexagon socket screw 502 passes through the threaded hole and then through the through-hole into the guide slot, where it abuts the bottom outer wall of the corresponding left or right guide rail. This stop nut 501 limits and guides the installation of the hexagon socket screw 502, improving installation accuracy.

[0039] Furthermore, the sidewall of the hexagon socket screw 502 is provided with a threaded structure that matches the inner wall of the limit nut 501. The screw hole of the limit nut 501 is a threaded hole, and the sidewall of the hexagon socket screw 502 is coated with thread glue to form a matching external thread, thereby achieving a threaded connection between the hexagon socket screw 502 and the limit nut 501, making it easier to screw the hexagon socket screw 502.

[0040] Furthermore, a copper rod 503 is mounted on top of the hexagon socket screw 502. The hexagon socket screw 502 can be rotated upward into the guide slot, pushing the copper rod 503 toward the bottom outer wall of the corresponding left or right guide rail. The copper rod 503 is made of a relatively soft material, which is not likely to damage the left or right guide rail, and is convenient for adjusting the upper and lower clearances.

[0041] Based on the above structure, combined with Figure 1-2 The assembly structure between the underframe 2, the left crawler beam 1 and the right crawler beam 3 will be described in detail.

[0042] The underframe 2 is connected to the left crawler beam 1 and the right crawler beam 3 through a hydraulic cylinder 4. The hydraulic cylinder 4 synchronizes the telescopic movements of the left crawler beam 1 and the right crawler beam 3 to ensure that the left crawler beam 1 and the right crawler beam 3 are synchronously telescoped in parallel.

[0043] The hydraulic cylinder 4 is fixed to the middle of the chassis 2, and the piston rod of the hydraulic cylinder 4 is connected to the middle of the corresponding left crawler beam 1 or the middle of the right crawler beam 3. The middle position of the hydraulic cylinder 4 is conducive to the stable extension and contraction of the left crawler beam 1 and the right crawler beam 3, preventing the left crawler beam 1 and the right crawler beam 3 from tilting, and ensuring that the left crawler beam 1 and the right crawler beam 3 extend and contract synchronously and in parallel.

[0044] The left track beam 1 and the right track beam 3 are both provided with connecting parts corresponding to the piston rods of the hydraulic cylinders 4. The piston rods of the hydraulic cylinders 4 are connected to the corresponding connecting parts via pins. In this way, the fixed connection between the hydraulic cylinders 4 and the corresponding left track beams 1 and right track beams 3 is achieved through the pins, ensuring that the hydraulic cylinders 4 are firmly connected to the left track beams 1 and right track beams 3.

[0045] In addition, both the left guide rail and the right guide rail are provided with sliding grooves, and the chassis 2 is provided with limiting bolts corresponding to the sliding grooves. The limiting bolts penetrate into the guide grooves and are clamped in the corresponding sliding grooves.

[0046] When the left guide rail and the right guide rail slide in the corresponding guide groove, the slide groove slides relative to the corresponding limit bolt, so that the limit bolt and the corresponding slide groove cooperate to guide the sliding of the left guide rail and the right guide rail, which is beneficial to ensure the parallelism of the extension and retraction of the left crawler beam frame 1 and the right crawler beam frame 3.

[0047] The chassis 2 is provided with a stopper corresponding to the stopper bolt. The stopper bolt passes through the stopper bolt into the guide slot and is locked in the corresponding chute. The stopper bolt has a hole adapted for the stopper bolt to pass through. In this way, the main rod of the stopper bolt is within the stopper bolt, which can guide and limit the installation of the stopper bolt through the stopper bolt, ensuring the accurate installation of the stopper bolt and the corresponding chute.

[0048] The technical means disclosed in the present invention are not limited to those disclosed in the above-mentioned embodiments, but also include technical solutions composed of any combination of the above-mentioned technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A telescopic traveling frame of an excavator, characterized in that: include: A chassis, comprising a chassis body and two hollow guide grooves, wherein the two guide grooves are provided at opposite ends of the chassis body and both extend along a first direction; A left crawler beam and a right crawler beam extending in a second direction are respectively provided at opposite ends of the underframe in the first direction, the first direction and the second direction are in the same horizontal plane and are arranged vertically, the left crawler beam and the right crawler beam are respectively provided with two left guide rails and two right guide rails extending in the first direction facing the underframe, the two left guide rails and the two right guide rails are respectively slidably inserted into the two guide grooves; An adjusting structure is provided at the bottom of the chassis. The adjusting structure can be rotatably inserted upward into the guide slot and abutted against the bottom outer wall of the corresponding left guide rail or the right guide rail.

2. The telescopic traveling frame of an excavator according to claim 1, characterized in that: The adjustment structure includes a hexagon socket screw, which is rotatably inserted into the guide slot and abuts against the bottom outer wall of the corresponding left guide rail or the right guide rail.

3. The telescopic traveling frame of an excavator according to claim 2, characterized in that: The adjustment structure includes a limiting nut, which is fixed at the bottom of the guide groove. The hexagon socket screw can be rotatably inserted upward into the guide groove through the limiting nut and is close to abutting the bottom outer wall of the corresponding left guide rail or the right guide rail.

4. The telescopic traveling frame of an excavator according to claim 3, characterized in that: The side wall of the hexagon socket screw is provided with a thread structure adapted to the inner wall of the limiting nut.

5. The telescopic traveling frame of an excavator according to claim 2, characterized in that: A copper rod is provided on the top of the hexagon socket screw. The hexagon socket screw can be rotatably inserted upward into the guide groove and push the copper rod to abut against the bottom outer wall of the corresponding left guide rail or the right guide rail.

6. The telescopic traveling frame of an excavator according to any one of claims 1 to 5, characterized in that: The underframe is connected to the left crawler beam frame and the right crawler beam frame through a hydraulic cylinder.

7. The telescopic traveling frame of an excavator according to claim 6, characterized in that: The hydraulic cylinder is fixed to the middle of the chassis, and the piston rod of the hydraulic cylinder is connected to the middle of the corresponding left crawler beam or the middle of the right crawler beam.

8. The telescopic traveling frame of an excavator according to claim 7, characterized in that: The left crawler beam frame and the right crawler beam frame are both provided with connecting parts corresponding to the piston rods of the hydraulic oil cylinders, and the piston rods of the hydraulic oil cylinders are connected to the corresponding connecting parts through pins.

9. The telescopic traveling frame of an excavator according to any one of claims 1 to 5, characterized in that: The left guide rail and the right guide rail are both provided with sliding grooves, and the chassis is provided with limiting bolts corresponding to the sliding grooves. The limiting bolts penetrate into the guide grooves and are clamped in the corresponding sliding grooves.

10. The telescopic traveling frame of an excavator according to claim 9, characterized in that: The base frame is provided with a limiting piece corresponding to the limiting bolt, and the limiting bolt passes through the limiting piece into the guide groove and is clamped in the corresponding sliding groove.

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