Crawler-type fork crane

Abstract

The utility model discloses a crawler-type fork crane which comprises two groups of crawler belt assemblies, the surfaces of the crawler belt assemblies are connected with an integral base frame assembly through bolt groups, hydraulic walking motors are arranged on the front sides of the crawler belt assemblies, an engine is installed on the base frame assembly, a plunger pump is installed on the base frame assembly, and the plunger pump is connected with the crawler belt assemblies. The output end of the engine is connected with the plunger pump; the utility model has the beneficial effects that the functions of a crane and a forklift are integrated on one device, and various tasks such as hoisting and forking transportation can be completed without frequently replacing the device in the same working site, so that the use efficiency of the device is greatly improved, the purchase and maintenance cost of the device is reduced, the parking space of the device is saved, and the working efficiency of the device is improved. And by arranging the multiple sets of supporting legs including the main legs, the front legs and the tail legs, the stability of the equipment in the operation process is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to caterpillar type folding boom crane and forklift technical field, especially caterpillar type forklift crane. BACKGROUND

[0002] At present, domestic low-altitude hoisting equipment mainly has tank wheel, spider crane, small and medium-sized caterpillar crane, each has certain limitation. For example, tank wheel cannot leave the ground, only suitable for transfer; spider crane and small caterpillar crane cannot satisfy large hoisting due to limited hoisting capacity; medium-sized caterpillar crane has single function, and investment is large;And forklift and crane are hoisting, and the commonly used engineering machinery is handled, therefore, our company decides to develop caterpillar type forklift crane to satisfy the demand of customer multifunction from the angle of customer, forms the differentiation competition, and creates greater profit space for customer according to market demand. INVENTION CONTENTS

[0003] The utility model discloses a caterpillar type forklift crane.

[0004] The utility model discloses a caterpillar type forklift crane, including two caterpillar assembly, the surface of caterpillar assembly is connected with integral type base frame assembly through bolt group, the front side of caterpillar assembly is equipped with hydraulic pressure walking motor, install the engine on the base frame assembly, install the plunger pump on the base frame assembly, and the output of engine is connected with plunger pump, the rear side upper end of base frame assembly is provided with mounting flange, and is installed with slewing bearing through this mounting flange, the inside center of slewing bearing is installed with center slewing joint, the inside of slewing bearing is installed with slewing reducer.

[0005] As a further scheme of the utility model: the tail of base frame assembly is provided with main leg fixed box and tail leg fixed box, and the inside of this main leg fixed box is installed with main leg vertical oil cylinder, main leg horizontal oil cylinder and main leg telescopic leg, the inside of tail leg fixed box is installed with tail leg vertical oil cylinder, tail leg telescopic oil cylinder and tail leg telescopic leg, the front side of base frame assembly is installed with front leg fixed box, the inside of front leg fixed box is installed with front leg vertical oil cylinder, front leg horizontal oil cylinder and front leg telescopic leg.

[0006] As a further scheme of the utility model: the foremost end of caterpillar assembly is installed with primary portal frame and secondary portal frame in proper order, the outside of secondary portal frame is installed with goods shelf, the bottom end of goods shelf is installed with goods fork, the inside of secondary portal frame is installed with lifting oil cylinder, goods fork side shift oil cylinder and inclination oil cylinder for driving the movement of goods fork.

[0007] As a further embodiment of this utility model: a center column is installed above the slewing bearing, and the center column is connected to the boom assembly via a pin. A luffing cylinder is hinged between the center column and the boom assembly. A counterweight frame is provided at the tail of the center column. A counterweight luffing cylinder is installed between the counterweight frame and the center column. A counterweight lifting cylinder is installed at the rear end of the counterweight frame.

[0008] As a further embodiment of this utility model: a base arm is connected to one side of the boom assembly via a cylindrical pin, and a luffing cylinder is installed between the boom assembly and the base arm. The shaft holes at both ends of the luffing cylinder are respectively fixed on the boom assembly and the base arm.

[0009] As a further embodiment of this utility model: several telescopic boom sections are installed inside the basic boom, and telescopic cylinders are installed between adjacent telescopic boom sections. A boom is fixed at the end of the telescopic boom section away from the basic boom, and a hook is installed at the bottom end of the boom through a lifting device mounting hole.

[0010] The beneficial effects of this utility model are:

[0011] This utility model integrates the functions of a crane and a forklift into one device. Within the same work area, it can complete multiple tasks such as lifting and forklift transportation without frequent equipment changes, greatly improving equipment utilization efficiency, reducing equipment procurement and maintenance costs, saving equipment parking space, and increasing site utilization. Furthermore, by setting up multiple outriggers, including main legs, front legs, and rear legs, these outriggers can be fully extended to their maximum span during operation, increasing the contact area and support range between the equipment and the ground. This effectively improves the stability of the equipment during operation, reduces the risk of tipping over due to uneven ground or unbalanced loads, and ensures operational safety. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0013] Figure 2 This utility model Figure 1 Enlarged view of point A in the middle;

[0014] Figure 3 This utility model Figure 1 Enlarged view of point B in the middle;

[0015] Figure 4 This utility model Figure 1 Enlarged view of point C in the middle.

[0016] In the diagram: 1. Track assembly; 2. Base frame assembly; 3. Main leg vertical cylinder; 4. Main leg horizontal cylinder; 5. Main leg telescopic leg; 6. Tail leg vertical cylinder; 7. Tail leg telescopic cylinder; 8. Tail leg telescopic leg; 9. Center slewing joint; 10. Slewing bearing; 11. Slewing reducer; 12. Center column; 13. Counterweight luffing cylinder; 14. Counterweight frame; 15. Counterweight lifting cylinder; 16. Luffing cylinder 1; 17. Slewing boom assembly; 18. Luffing cylinder 2; 19. Main boom; 20. Telescopic boom cylinder; 21. Telescopic cylinder; 22. Hook; 23. Primary mast; 24. Secondary mast; 25. Shelf; 26. Forks; 27. Lifting cylinder; 28. Fork side shifting cylinder; 29. 30. Tilt cylinder; 31. Front leg vertical cylinder; 32. Front leg horizontal cylinder; 33. Front leg telescopic leg; 34. Front leg mounting box; 35. Engine; 36. Drive shaft; 37. Piston pump; 38. Radiator; 39. Fuel tank; 40. Upper vehicle load-sensitive proportional valve; 41. Outrigger control valve; 42. Forklift control valve. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] A tracked forklift includes two track assemblies 1. An integral base frame assembly 2 is bolted to the surface of the track assembly 1. A steel plate on top of the track assembly 1 serves as the main load-bearing platform. A hydraulic travel motor is provided on the front side of the track assembly 1. An engine 34 and a plunger pump 36 are mounted on the base frame assembly 2, and the output end of the engine 34 is connected to the plunger pump 36. After the engine 34 is started, it drives the plunger pump 36 to work, realizing the operation of the hydraulic system. A mounting flange is provided at the upper rear side of the base frame assembly 2, and a slewing bearing 10 is mounted through this mounting flange. A central slewing joint 9 is installed at the center of the slewing bearing 10. A slewing reducer 11 is installed inside the slewing bearing 10. The slewing bearing 10 can achieve 360-degree rotation by driving the slewing reducer 11. The central slewing joint 9 allows the pipeline above the turntable to rotate with the turntable, keeping it relatively stationary and preventing torsion damage.

[0019] The rear of the base frame assembly 2 is equipped with a main leg fixing box and a tail leg fixing box. The main leg fixing box contains a main leg vertical cylinder 3, a main leg horizontal cylinder 4, and a main leg telescopic leg 5. The tail leg fixing box contains a tail leg vertical cylinder 6, a tail leg telescopic cylinder 7, and a tail leg telescopic leg 8. The front side of the base frame assembly 2 is equipped with a front leg fixing box 33. The front leg fixing box 33 contains a front leg vertical cylinder 30, a front leg horizontal cylinder 31, and a front leg telescopic leg 32. When the crane is working, all outriggers are opened by operating the lowering valve. When conditions permit, the outriggers should be fully opened to maximize the span, which improves the stability of the entire vehicle.

[0020] At the very front of the track assembly 1, a primary mast 23 and a secondary mast 24 are sequentially installed. A rack 25 is installed on the outside of the secondary mast 24, and a fork 26 is installed at the bottom of the rack 25. Inside the secondary mast 24, a lifting cylinder 27, a fork side-shifting cylinder 28, and a tilting cylinder 29 for driving the movement of the fork 26 are installed. A center column 12 is installed above the slewing bearing 10, and the center column 12 is connected to the boom assembly 17 by a pin. A luffing cylinder 16 is hinged between the center column 12 and the boom assembly 17. A counterweight frame 14 is provided at the rear of the center column 12, and a counterweight luffing cylinder 13 is installed between the counterweight frame 14 and the center column 12. A counterweight lifting cylinder 15 is installed at the rear end of the counterweight frame 14. When operating the forklift, all outriggers should be fully retracted, at which time the forklift and the crane act as counterweights to each other. By manipulating the load-sensitive multi-way valve of the forklift, the forklift can be lifted, tilted, and moved to the side of the forks, as well as the mast can be extended and retracted, and the tracks can be moved to achieve loaded movement. Under the action of the luffing cylinder, the boom can be lifted and lowered. The counterweight frame 14 can balance the overturning moment during lifting, thereby improving lifting capacity and safety.

[0021] One side of the boom assembly 17 is connected to the base boom 19 via a cylindrical pin. A luffing cylinder 18 is installed between the boom assembly 17 and the base boom 19. The two ends of the luffing cylinder 18 are fixed to the boom assembly 17 and the base boom 19, respectively. The pitching motion of the base boom and the telescopic boom is achieved by the extension and retraction of the luffing cylinder 18.

[0022] The basic boom 19 has several telescopic boom sections 20 installed inside, and telescopic cylinders 21 are installed between adjacent telescopic boom sections 20. A boom is fixed to the end of the telescopic boom section 20 away from the basic boom 19. A hook 22 is installed at the bottom end of the boom through the lifting tool mounting hole. All the telescopic cylinders 21 are connected in series to form a circuit. The telescopic boom section 20 is pushed to extend and retract by the extension and retraction of the telescopic cylinders 21.

[0023] Working principle: Engine 34 serves as the power unit of the vehicle. Its power pack is equipped with a three-in-one radiator 37, air filter, accelerator pedal, and exhaust gas processor. Its main shaft is connected to the plunger pump 36 via the drive shaft 35. The pump draws oil from the oil tank 38, which passes through the high-pressure filter to the three-way rotary valve. The A end of the three-way valve is connected to the upper load sensitive proportional valve 39. The upper load sensitive proportional valve 39 consists of two valve groups, which control the crane and forklift parts respectively. They can be switched via the remote control joystick. The movement of the outriggers and forklift can be controlled separately via the outrigger control valve 40 and the forklift control valve 41.

[0024] The main actions of the crane are as follows: lifting by luffing cylinder 16, lifting by luffing cylinder 18, telescopic cylinder 21, slewing reducer 11, counterweight luffing cylinder 13, counterweight lifting cylinder 15, and counterweight frame telescopic cylinder (7 actions in total). The main actions of the forklift are as follows: left track travel motor, right track travel motor, forklift lifting hydraulic pipe, left track travel motor, forklift swing cylinder, left fork shift cylinder 28, right fork side shift cylinder 28, and mast sliding side shift cylinder (7 actions in total). The three-way valve B is connected to the multi-way valve of the outriggers, controlling the left vertical cylinder of the main leg, the left horizontal cylinder of the main leg, the right vertical cylinder of the main leg, the right horizontal cylinder of the main leg, the left vertical cylinder of the front leg, the left horizontal cylinder of the front leg, the right vertical cylinder of the front leg, the right horizontal cylinder of the front leg, the left vertical cylinder of the rear leg, the left horizontal cylinder of the rear leg, the right vertical cylinder of the rear leg, and the right horizontal cylinder of the rear leg (12 actions in total).

[0025] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0026] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider 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.

Claims

1. A caterpillar fork lift truck comprising two sets of caterpillar assemblies (1), characterized in that: The surface of the track assembly (1) is connected with the integral base frame assembly (2) through a bolt set, the front side of the track assembly (1) is provided with a hydraulic walking motor, an engine (34) is installed on the base frame assembly (2), a plunger pump (36) is installed on the base frame assembly (2), and the output end of the engine (34) is connected with the plunger pump (36), the rear upper end of the base frame assembly (2) is provided with a mounting flange, and a slewing bearing (10) is installed through the mounting flange, a central slewing joint (9) is installed at the inner center of the slewing bearing (10), and a slewing reducer (11) is installed in the inner part of the slewing bearing (10).

2. A caterpillar fork lift truck according to claim 1, characterised in that: The tail part of the base frame assembly (2) is provided with a main leg fixing box and a tail leg fixing box, the main leg fixing box is internally provided with a main leg vertical oil cylinder (3), a main leg horizontal oil cylinder (4) and a main leg telescopic leg (5), the tail leg fixing box is internally provided with a tail leg vertical oil cylinder (6), a tail leg telescopic oil cylinder (7) and a tail leg telescopic leg (8), and the front side of the base frame assembly (2) is provided with a front leg fixing box (33), the inner part of the front leg fixing box (33) is provided with a front leg vertical oil cylinder (30), a front leg horizontal oil cylinder (31) and a front leg telescopic leg (32).

3. A caterpillar fork lift truck according to claim 1, characterized in that: The front end of the track assembly (1) is sequentially provided with a first gantry (23) and a second gantry (24), the outer side of the second gantry (24) is provided with a goods shelf (25), the bottom end of the goods shelf (25) is provided with a fork (26), and the inner part of the second gantry (24) is provided with a lifting oil cylinder (27), a fork side shifting oil cylinder (28) and an inclination oil cylinder (29) for driving the fork (26) to move.

4. The caterpillar fork lift truck according to claim 1, characterized in that: The upper part of the slewing bearing (10) is provided with a middle column (12), the middle column (12) is connected with the rotary arm assembly (17) through a pin shaft, a variable amplitude one oil cylinder (16) is hingedly installed between the middle column (12) and the rotary arm assembly (17), the tail part of the middle column (12) is provided with a counterweight frame (14), a counterweight variable amplitude oil cylinder (13) is installed between the counterweight frame (14) and the middle column (12), and the rear side end of the counterweight frame (14) is provided with a counterweight lifting oil cylinder (15).

5. A caterpillar fork lift according to claim 4, characterized in that: One side of the rotary arm assembly (17) is connected with a basic arm (19) through a cylindrical pin shaft, a variable amplitude two oil cylinder (18) is installed between the rotary arm assembly (17) and the basic arm (19), and the two end shaft holes of the variable amplitude two oil cylinder (18) are respectively fixed on the rotary arm assembly (17) and the basic arm (19).

6. A caterpillar fork lift according to claim 5, characterized in that: The inner part of the basic arm (19) is provided with a plurality of telescopic arm cylinders (20), and a telescopic oil cylinder (21) is installed between adjacent telescopic arm cylinders (20), and the end of the telescopic arm cylinder (20) away from the basic arm (19) is fixed with a lifting arm, and the bottom end of the lifting arm is provided with a lifting hook (22) through a lifting tool installation hole.

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