Land leveler

Abstract

The utility model discloses a land leveler which comprises a gooseneck camber beam and a telescopic bucket, the gooseneck camber beam is fixed on one side of the outer portion of the telescopic bucket, the gooseneck camber beam is bent and extends to the other side of the telescopic bucket along the upper portion of the telescopic bucket, a rear wheel frame is hinged to the outer side of the connecting position of the telescopic bucket and the gooseneck camber beam, and the rear wheel frame is connected with the gooseneck camber beam. A directional wheel carrier and an adjustable wheel carrier are rotationally arranged on the two sides of the rear wheel carrier. The land leveler has the advantages that the three sets of wheels distributed in the shape like the Chinese character'pin 'are arranged on each of the two sides of the rear wheel frame, the structural stability of the two sides of the rear wheel frame is improved, meanwhile, pressure of the land leveler on the same track in the advancing direction is dispersed, and a leveled area is prevented from being compacted again by rear wheels arranged in two rows; a traditional traction frame of a square steel structure is replaced by two symmetrically-distributed side beams, the structure of a gooseneck camber beam is improved, soil block impurities shoveled upwards can be discharged, the problem that the traction frame presses soil is solved, and practicability is high.

Description

Technical Field

[0001] The utility model relates to the field of land leveling equipment, and particularly relates to a grader. Background Art

[0002] A grader is an earthwork construction machinery mainly used for completing large-area soil leveling. The grader relies on an arc-shaped bucket (also known as a scraper) to scrape the uneven parts of the ground. It is flexible and has a high leveling efficiency, and has become a special machine for leveling and shaping construction in infrastructure construction projects such as national defense projects, road construction, mine construction, water conservancy construction, and farmland improvement. The existing grader sets a rear wheel frame behind the bucket, and the bucket is supported by the rear wheel frame for pitch angle adjustment. Since at most four groups of wheels are arranged on the outside of the current rear wheel frame, the stability is poor when encountering large undulations on the ground surface during walking. Especially when the support heights of the two side wheels are adjusted to different positions, the rear wheel frame structure with two groups of wheels arranged on both sides is unstable; at the same time, the current grader is connected to a power vehicle through a traction frame made of square steel structure, and reinforcement structures are arranged on both sides of the traction frame, resulting in the traction frame mostly being triangular. In actual use, it is easy to get stuck with soil in the traction frame, especially in the case of containing straw in farmland, there is a problem of soil pressing at the position of the traction frame. After the soil is turned over, it is easy to get stuck with straw soil blocks at the position of the traction frame, and frequent cleaning is required. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a grader to solve the above problems. Three groups of wheels distributed in a "pin" shape are arranged on both sides of the rear wheel frame, which improves the structural stability on both sides of the rear wheel frame, and at the same time disperses the pressure of the grader on the same track in the traveling direction, avoiding the area after leveling from being re-compacted by the rear wheels arranged in a double row. Details are described below.

[0004] To achieve the above purpose, the utility model provides the following technical solutions:

[0005] A grader provided by the utility model includes a gooseneck beam and a telescopic bucket. The gooseneck beam is fixed on the outside of one side of the telescopic bucket, and the gooseneck beam bends upward along the telescopic bucket and extends to the other side of the telescopic bucket. A rear wheel frame is hinged on the outside of the connection between the telescopic bucket and the gooseneck beam. Three groups of wheels distributed in a "pin" shape are rotatably arranged on the outside of the rear wheel frame on both sides. The gooseneck beam is hinged with a pitch adjustment oil cylinder for pulling the rear wheel frame to rotate.

[0006] The gooseneck beam includes two longitudinally symmetrically distributed side beams. A connection frame for hinging and supporting the pitch adjustment oil cylinder is longitudinally fixed in the middle of the two side beams, and several connecting rods are longitudinally fixedly connected between the two side beams.

[0007] In the above-mentioned grader, during use, the bucket extension cylinder pushes the side bucket to extend and retract inward and outward under the support of the bucket extension beam, thereby changing the coverage width of the extension bucket. When it is necessary to adjust the distance between the adjustable wheel frame and the directional wheel frame, the frame extension cylinder pushes the extension beam core to extend and retract within the extension beam sleeve, changing the length of the extension beam core extending out of the extension beam sleeve, and thus changing the overall width of the rear wheel frame to adjust the distance between the directional wheel frame and the adjustable wheel frame. During the grading process, the six sets of wheels on both sides of the rear wheel frame serve as the walking support structure, and by changing the extension and retraction state of the angle adjustment cylinder, the support height of the adjustable wheel frame is changed, thereby correspondingly adjusting the support height on both sides of the extension bucket.

[0008] Preferably, the telescopic bucket includes a main bucket fixed to the end of the gooseneck beam, with side buckets extending outward on both sides of the main bucket. A bucket telescopic beam is fixed to the outside of the main bucket to guide the side buckets to extend and retract outward, and two sets of bucket telescopic cylinders corresponding to support the extension and retraction of the side buckets are fixed to the top side of the bucket telescopic beam.

[0009] Preferably, a hinged seat supporting the rotation of the rear wheel frame is fixed on the outer side of the bucket telescopic beam. The rear wheel frame includes a wheel frame body rotatably connected to the hinged seat. A longitudinally extending telescopic beam sleeve is fixed on the outer side of the wheel frame body. Telescopic beam cores protrude from the openings at both the front and rear ends of the telescopic beam sleeve. A main shaft supporting the rotation of the directional wheel frame and the adjustable wheel frame is fixed in the middle of the two sets of telescopic beam cores.

[0010] Preferably, the outer end of the main shaft extends through the directional wheel frame and the adjustable wheel frame, and the outer end of the main shaft is rotatably connected to a group of wheels in the middle through a bearing. Both ends of the directional wheel frame and the adjustable wheel frame are fixed with side axles to support the rotation of the two groups of wheels on the outer side.

[0011] Preferably, the top side of the telescopic beam sleeve is provided with two sets of frame telescopic cylinders that drive the movement of the two sets of telescopic beam cores, and the top side of the wheel frame body is hinged to the telescopic end of the pitch adjustment cylinder.

[0012] Preferably, the adjustable wheel frame includes a long frame that is rotatably coupled to the main shaft, and a short frame is hinged to the outer end of the long frame. Both ends of the long frame and the short frame are rotatably coupled to the wheel via the side axle.

[0013] Preferably, a rear hydraulic cylinder bracket is fixed to the top side of the long frame, a front hydraulic cylinder bracket is fixed to the top side of the short frame, and an angle-adjusting hydraulic cylinder is provided above the long frame, with its two ends hinged to the front hydraulic cylinder bracket and the rear hydraulic cylinder bracket, respectively.

[0014] Preferably, the main bucket and the side bucket are arc-shaped bending plate structures that fit together, and both the top sides of the main bucket and the side bucket are bent and overlapped toward the side of the rear wheel frame.

[0015] The beneficial effects are as follows: By arranging three groups of wheels distributed in a "pin" shape on both sides of the rear wheel frame, the structural stability on both sides of the rear wheel frame is improved. At the same time, the pressure on the same track in the traveling direction of the grader is dispersed, avoiding the re-compaction of the leveled area by the rear wheels arranged in two rows;

[0016] And replacing the traditional traction frame with a square steel structure with two symmetrically distributed side beams, improving the structure of the gooseneck curved beam, enabling it to discharge the soil clods and impurities shoveled upward, avoiding the problem of soil pressing on the traction frame, and having strong practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention 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 following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 is the front view structural diagram of the present invention;

[0019] Figure 2 is the three-dimensional structural schematic diagram of the present invention;

[0020] Figure 3 is the top view structural diagram of the present invention; <000s047>

[0021] Figure 4 is the three-dimensional structural schematic diagram of the telescopic bucket of the present invention;

[0022] Figure 5 is the three-dimensional structural schematic diagram of the gooseneck curved beam of the present invention;

[0023] Figure 6 is the structural split schematic diagram of the adjustable wheel frame of the present invention;

[0024] Figure 7 is the structural split schematic diagram of the directional wheel frame of the present invention.

[0025] The description of the reference numerals is as follows: <0000s61><oo00062>1. Goose-neck curved beam; 101. Side beam; 102. Connecting frame; 103. Connecting rod; 2. Telescopic bucket; 201. Main bucket; 202. Side bucket; 203. Bucket telescopic beam; 204. Bucket telescopic oil cylinder; 205. Hinge seat; 3. Rear wheel frame; 301. Telescopic beam sleeve; 302. Telescopic beam core; 303. Frame telescopic oil cylinder; 304. Wheel frame main body; 4. Pitching adjustment oil cylinder; 5. Adjustable wheel frame; 501. Long frame body; 502. Short frame body; 503. Front oil cylinder frame; 504. Rear oil cylinder frame; 505. Angle adjustment oil cylinder; 6. Fixed-direction wheel frame; 7. Wheels; 8. Main shaft; 9. Side shaft. Detailed implementation manners

[0027] To make the objectives, technical solutions and advantages of the present utility model clearer, the technical solutions of the present utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other implementation manners obtained by those of ordinary skill in the art without creative efforts fall within the scope protected by the present utility model.

[0028] See Figures 1-7 As shown, the present utility model provides a grader, which includes a goose-neck curved beam 1 and a telescopic bucket 2. The goose-neck curved beam 1 is fixed to the outer side of one side of the telescopic bucket 2. The other end of the goose-neck curved beam 1 is fixed to a towing vehicle for towing and walking. The goose-neck curved beam 1 bends and extends above the telescopic bucket 2 to the other side of the telescopic bucket 2. An outer rear wheel frame 3 is hinged to the outside of the connection between the telescopic bucket 2 and the goose-neck curved beam 1. Fixed-direction wheel frames 6 and adjustable wheel frames 5 are rotatably arranged on both sides of the rear wheel frame 3. Three groups of wheels 7 distributed in a "pin" shape are rotatably arranged on the outside of the fixed-direction wheel frames 6 and the adjustable wheel frames 5. A pitching adjustment oil cylinder 4 for pulling and rotating the rear wheel frame 3 is hinged to the outside of the goose-neck curved beam 1. The front telescopic bucket 2 walks by the support of the six-wheel structure rear wheel frame 3;

[0029] The goose-neck curved beam 1 includes two groups of longitudinally symmetrically distributed side beams 101. A connecting frame 102 for hinging and supporting the pitching adjustment oil cylinder 4 is longitudinally fixed in the middle of the two groups of side beams 101. A number of connecting rods 103 are longitudinally fixedly connected between the two groups of side beams 101. The number of connecting rods 103 is preferably two, and they are arranged horizontally and longitudinally connected to the top edge position of the side beam 101 to avoid obstruction and jamming of the impurities shoveled up below. The telescopic bucket 2 is supported and connected by the side beams 101 with a vertically extending flat plate structure. Thus, during use, when straws and soil clods are shoveled up by the bucket and fall into the position of the goose-neck curved beam 1, it is avoided that sundries get stuck in the goose-neck curved beam 1 and cause the problem of soil pressing.

[0030] As an optional implementation, the telescopic bucket 2 includes a main bucket 201 fixed to the end of the gooseneck beam 1. Both sides of the main bucket 201 are provided with side buckets 202 that can expand the bucket width. A bucket telescopic beam 203 is fixed to the outside of the main bucket 201 to guide the side buckets 202 to extend and retract outward. Two sets of bucket telescopic cylinders 204 are fixed to the top side of the bucket telescopic beam 203 to support the extension and retraction of the side buckets 202 to achieve the width change.

[0031] A hinge seat 205 supporting the rotation of the rear wheel frame 3 is fixed on the outer side of the bucket telescopic beam 203. The rear wheel frame 3 includes a wheel frame body 304 rotatably connected to the hinge seat 205. A longitudinally extending telescopic beam sleeve 301 is fixed on the outer side of the wheel frame body 304. Telescopic beam cores 302 protrude from the openings at both ends of the telescopic beam sleeve 301. The telescopic beam cores 302 and the telescopic beam sleeve 301 are clearance-fitted to ensure that the telescopic beam cores 302 can extend out of the telescopic beam sleeve 301. A main shaft 8 supporting the rotation of the directional wheel frame 6 and the adjustable wheel frame 5 is fixed in the middle of the two sets of telescopic beam cores 302 respectively. The outer end of the main shaft 8 protrudes from the directional wheel frame 6 and the adjustable wheel frame 5, and the outer end of the main shaft 8 is rotatably connected to a set of wheels 7 in the middle through a bearing. Side shafts 9 supporting the rotation of the two sets of wheels 7 on the outer sides of both ends of the directional wheel frame 6 and the adjustable wheel frame 5 are fixed on the outer sides through bearings.

[0032] The top side of the telescopic beam sleeve 301 is provided with two sets of frame telescopic cylinders 303 that drive the movement of the two sets of telescopic beam cores 302 respectively, and the top side of the wheel frame body 304 is hinged to the telescopic end of the pitch adjustment cylinder 4. The adjustable wheel frame 5 includes a long frame 501 that is rotatably engaged with the main shaft 8. The outer end of the long frame 501 is hinged with a short frame 502. Both ends of the long frame 501 and the short frame 502 are rotatably engaged with the wheel 7 through the side axle 9.

[0033] In addition, a rear hydraulic cylinder frame 504 is fixed to the top side of the long frame 501, and a front hydraulic cylinder frame 503 is fixed to the top side of the short frame 502. An angle-adjusting hydraulic cylinder 505 is installed above the long frame 501. The two ends of the angle-adjusting hydraulic cylinder 505 are hinged to the front hydraulic cylinder frame 503 and the rear hydraulic cylinder frame 504 respectively, so that the long frame 501 and the short frame 502 can be driven to rotate through the angle-adjusting hydraulic cylinder 505. The main bucket 201 and the side bucket 202 are arc-shaped curved plate structures that fit together, and the top sides of the main bucket 201 and the side bucket 202 are bent and overlapped towards the side close to the rear wheel frame 3. On the one hand, this can improve the structural strength of the main bucket 201 and the side bucket 202, and on the other hand, it can guide the soil layer scooped up to move upward.

[0034] With the above structure, during use, the side bucket 202 is pushed by the bucket telescopic oil cylinder to telescopically extend in and out under the support of the bucket telescopic beam 203, thereby changing the coverage width of the telescopic bucket 2; when it is necessary to adjust the distance between the adjustable wheel carrier 5 and the directional wheel carrier 6, the telescopic beam core 302 is pushed by the vehicle frame telescopic oil cylinder to telescopically extend in the telescopic beam sleeve 301, changing the length of the telescopic beam core 302 extending out of the telescopic beam sleeve 301, and further changing the overall width of the rear wheel carrier 3 to adjust the distance between the directional wheel carrier 6 and the adjustable wheel carrier 5; during the leveling process, six groups of wheels 7 on both sides of the rear wheel carrier 3 are relied on as the walking support structure, and by changing the telescopic state of the angle adjustment oil cylinder 505, the support height of the adjustable wheel carrier 5 is changed, so as to correspondingly adjust the support heights on both sides of the telescopic bucket 2.

[0035] By arranging three groups of wheels 7 distributed in a "pin" shape on both sides of the rear wheel carrier 3, the structural stability on both sides of the rear wheel carrier 3 is improved, and at the same time, the pressure on the same track in the traveling direction of the grader is dispersed, avoiding the re-compaction of the leveled area by the rear wheels arranged in two rows.

[0036] And replacing the traditional traction frame with a square steel structure with two symmetrically distributed side beams 101, improving the structure of the gooseneck curved beam 1, enabling it to discharge the soil clumps and impurities shoveled upwards, avoiding the problem of soil pressing by the traction frame, and having strong practicability.

[0037] As described above, only the specific implementation manners of the present invention are provided, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A grader, characterized in that: It includes a gooseneck curved beam (1) and a telescopic bucket (2). The gooseneck curved beam (1) is fixed to the outer side of one side of the telescopic bucket (2), and the gooseneck curved beam (1) bends and extends above the telescopic bucket (2) to the other side of the telescopic bucket (2). On the outer side of the joint of the telescopic bucket (2) and the gooseneck curved beam (1), a rear wheel frame (3) is hinged. On both sides of the rear wheel frame (3), a directional wheel frame (6) and an adjustable wheel frame (5) are rotatably arranged. On the outer sides of the directional wheel frame (6) and the adjustable wheel frame (5), three groups of wheels (7) distributed in a "pin" shape are rotatably arranged. On the outer side of the gooseneck curved beam (1), a pitching adjustment oil cylinder (4) for pulling and rotating the rear wheel frame (3) is hinged. The gooseneck curved beam (1) includes two groups of side beams (101) symmetrically distributed longitudinally. In the middle of the two groups of side beams (101), a connecting frame (102) for hinging and supporting the pitching adjustment oil cylinder (4) is longitudinally fixed, and several connecting rods (103) are longitudinally fixedly connected between the two groups of side beams (101).

2. The grader according to claim 1, characterized in that: The telescopic bucket (2) includes a main bucket (201) fixed to the end of the gooseneck curved beam (1). On both sides of the main bucket (201), side buckets (202) extend outward. On the outer side of the main bucket (201), a bucket telescopic beam (203) for guiding the outward telescoping of the side buckets (202) is fixed. On the top side of the bucket telescopic beam (203), two groups of bucket telescopic oil cylinders (204) corresponding to supporting the telescoping of the side buckets (202) are fixed.

3. A grader according to claim 2, characterized in that: On the outer side of the bucket telescopic beam (203), a hinge seat (205) for supporting the rotation of the rear wheel frame (3) is fixed. The rear wheel frame (3) includes a wheel frame main body (304) rotatably connected to the hinge seat (205). On the outer side of the wheel frame main body (304), a longitudinally extending telescopic beam sleeve (301) is fixed. Telescopic beam cores (302) pass through the openings at the front and rear ends of the telescopic beam sleeve (301). In the middle of the two groups of telescopic beam cores (302), a main shaft (8) for respectively supporting the rotation of the directional wheel frame (6) and the adjustable wheel frame (5) is fixed.

4. A grader according to claim 3, characterized in that: The outer end of the main shaft (8) passes through the directional wheel frame (6) and the adjustable wheel frame (5), and the outer end of the main shaft (8) is rotatably connected to a group of wheels (7) in the middle through a bearing. On the outer sides of the two ends of the directional wheel frame (6) and the adjustable wheel frame (5), side shafts (9) for supporting the rotation of the two groups of outer wheels (7) are fixed.

5. A grader according to claim 4, characterized in that: On the top side of the telescopic beam sleeve (301), two groups of vehicle frame telescopic oil cylinders (303) corresponding to driving the movement of the two groups of telescopic beam cores (302) are arranged, and the top side of the wheel frame main body (304) is hinged to the telescopic end of the pitching adjustment oil cylinder (4).

6. A grader according to claim 5, characterized in that: The adjustable wheel frame (5) includes a long frame body (501) rotatably fitted with the main shaft (8). The outer end of the long frame body (501) is hinged to a short frame body (502). Both ends of the long frame body (501) and the short frame body (502) are rotatably fitted with the wheels (7) through the side shafts (9).

7. A grader according to claim 6, characterized in that: A rear cylinder bracket (504) is fixed to the top side of the long frame (501), a front cylinder bracket (503) is fixed to the top side of the short frame (502), and an angle-adjusting cylinder (505) is provided above the long frame (501). The two ends of the angle-adjusting cylinder (505) are respectively hinged to the front cylinder bracket (503) and the rear cylinder bracket (504).

8. A grader according to claim 7, characterized in that: The main bucket (201) and the side bucket (202) are curved plate structures that fit together, and the top sides of the main bucket (201) and the side bucket (202) are bent and overlapped towards the side of the rear wheel frame (3).

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