Excavator hydraulic thumb

Abstract

The utility model discloses a kind of excavator hydraulic thumb clamps, it is related to excavator technical field, including bucket rod, the bucket rod is rotatably connected together with the one end of first swing arm, adjustable clamp jaw is detachably connected to the other end of first swing arm;First mounting hole and second mounting hole are provided on the first swing arm, a connecting mounting hole and multiple positioning mounting holes are provided on the adjustable clamp jaw, the positioning mounting hole is equally spaced annular distribution on the connecting mounting hole upside, the connecting mounting hole is connected with the first mounting hole by first pin shaft, the positioning mounting hole is connected with the second mounting hole by second pin shaft;The first swing arm is connected with the drive mechanism rotatably connected on the bucket rod.This utility model is simple in structure, easy to operate, better in adaptability, has the advantage of more closely stable, not easy to fall, higher safety when cooperating with excavator clamping round wood or stone column and other cylindrical objects.

Description

Technical Field

[0001] This utility model relates to the field of excavator technology, and in particular to a hydraulic thumb clamp for excavators. Background Technology

[0002] The hydraulic thumb clamp for excavators is an accessory used with the excavator bucket. Since the bucket itself only has the function of digging and holding materials and does not have a clamping function, a thumb clamp is added to facilitate the clamping and handling of materials such as thick logs. However, most thumb clamps on the market are currently one-piece molded. Although the thumb clamp body has a certain curvature or anti-slip texture, when clamping thicker materials such as logs or stone pillars, it can only be placed horizontally between the bucket opening and the thumb clamp. In this case, because the curvature of the thumb clamp itself is fixed, an excessively large opening angle occurs (e.g., ...). Figure 1 As shown in the figure, this makes it impossible to effectively clamp and fix the logs or stone pillars, which poses a risk of falling during transportation. Utility Model Content

[0003] The purpose of this utility model is to provide a hydraulic thumb clamp for excavators, which solves the problem mentioned in the background art that the existing hydraulic thumb clamps for excavators have a fixed curvature. If the opening angle is too large, they will not be able to effectively clamp and fix the logs or stone pillars, and there is a risk of them falling during transportation.

[0004] The present invention adopts the following technical solution:

[0005] This utility model relates to a hydraulic thumb clamp for excavators, which includes a stick, one end of which is rotatably connected to a first boom, and the other end of the first boom is detachably connected to an adjustable clamping jaw.

[0006] The first rotating arm is provided with a first mounting hole and a second mounting hole. The adjustable gripper is provided with a connecting mounting hole and a plurality of positioning mounting holes. The positioning mounting holes are distributed in a ring at equal intervals on the upper side of the connecting mounting hole. The connecting mounting hole is connected to the first mounting hole by a first pin, and the positioning mounting hole is connected to the second mounting hole by a second pin.

[0007] The first rotating arm is connected to a drive mechanism that is rotatably connected to the boom.

[0008] Preferably, the first rotating arm includes two parallel arm plates, and a reinforcing cross plate is fixedly connected between the two arm plates. A first perforated plate is provided on the reinforcing cross plate, and a reserved hole is provided in the first perforated plate. The first perforated plate is connected to the drive mechanism.

[0009] The boom is provided with a second perforated plate, and one end of the boom plate is provided with a docking hole. The docking hole is rotatably connected to the second perforated plate by a pin. The other end of the boom plate is provided with the first mounting hole and the second mounting hole.

[0010] Preferably, an upper ear plate is provided on the upper side of the end of the arm plate away from the docking hole, and the second mounting hole is provided in the upper ear plate;

[0011] The first mounting hole is located inside the arm plate below the upper ear plate.

[0012] Preferably, the adjustable gripper includes a connecting end and a clamping end. The connecting end has a fan-shaped plate structure. The connecting mounting hole is located on the lower side of the connecting end. The positioning mounting holes are evenly spaced and distributed in a ring shape near the circumference of the fan-shaped plate of the connecting end.

[0013] The distance between the connecting mounting hole and the positioning mounting hole is equal to the distance between the first mounting hole and the second mounting hole, and the distance between each positioning mounting hole and the connecting mounting hole is equal.

[0014] Preferably, the inner side of the clamping end is provided with anti-slip texture.

[0015] Preferably, the connecting end is provided with a clearance side on the side near the stick.

[0016] Preferably, multiple adjustable grippers are provided, and the adjustable grippers are fixedly connected to each other by a fixing rod;

[0017] After the first pin passes through all the connecting mounting holes and the first mounting hole, it connects all the adjustable jaws to the first rotating arm.

[0018] After the second pin passes through all the positioning mounting holes and the second mounting hole, it connects all the adjustable jaws to the first rotating arm.

[0019] Preferably, the driving mechanism is a hydraulic cylinder, which includes a cylinder body end and a piston rod end. The cylinder body end is rotatably connected to the boom, and the piston rod end is rotatably connected to the first rotating arm.

[0020] Compared with the prior art, the beneficial technical effects of this utility model are as follows:

[0021] This utility model is designed with a rotating first arm and an adjustable gripper that are rotatably connected, and the included angle between the two can be adjusted. It has the advantages of simple structure, easy operation, better adaptability, and a more secure and stable fit when used with a bucket to hold cylindrical objects such as logs or stone pillars, making them less likely to fall off and providing higher safety. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings.

[0023] Figure 1 This is a schematic diagram of the working state of the existing hydraulic thumb clamp of an excavator mentioned in the background art;

[0024] Figure 2 This is a front view of the hydraulic thumb clamp for excavators according to this utility model;

[0025] Figure 3 This is a schematic diagram of the hydraulic thumb clamp structure for excavators according to this utility model;

[0026] Explanation of reference numerals in the attached drawings: 1. Bucket stick; 1-1. Second perforated plate; 2. First rotating arm; 2-1. Arm plate; 2-1-1. Docking hole; 2-1-2. Upper ear plate; 2-2. Reinforcing cross plate; 2-3. First perforated plate; 3. First mounting hole; 4. Second mounting hole; 5. Adjustable gripper; 5-1. Connecting end; 5-2. Clamping end; 5-3. Clearance edge; 6. Connecting mounting hole; 7. Positioning mounting hole; 8. First pin; 9. Second pin; 10. Drive mechanism; 10-1. Cylinder end; 10-2. Piston rod end. Detailed Implementation

[0027] To make the technical problems, technical solutions and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0028] like Figures 2 to 3 As shown, this embodiment discloses a hydraulic thumb clamp for excavators, including a stick 1, a bucket rotatably connected to the stick 1, and the back of the bucket rotatably connected to the piston rod end of a cylinder rotatably connected to the stick 1. The side of the stick 1 facing away from the bucket is rotatably connected to one end of a first boom 2, and an adjustable gripper 5 is detachably connected to the other end of the first boom 2.

[0029] The first rotating arm 2 is provided with a first mounting hole 3 and a second mounting hole 4. The adjustable gripper 5 is provided with a connecting mounting hole 6 and multiple positioning mounting holes 7. The positioning mounting holes 7 are evenly spaced and arranged in a ring above the connecting mounting hole 6. The connecting mounting hole 6 is connected to the first mounting hole 3 by a first pin 8, and the positioning mounting holes 7 are connected to the second mounting holes 4 by a second pin 9. The first rotating arm 2 is connected to a drive mechanism 10 that is rotatably connected to the stick 1. The drive mechanism 10 is a hydraulic cylinder, which includes a cylinder body end 10-1 and a piston rod end 10-2. The cylinder body end 10-1 is rotatably connected to the stick 1, and the piston rod end 10-2 is rotatably connected to the first rotating arm 2.

[0030] In this embodiment, the first rotating arm 2 includes two parallel arm plates 2-1, and a reinforcing horizontal plate 2-2 is fixedly connected between the two arm plates 2-1. A first perforated plate 2-3 is provided on the reinforcing horizontal plate 2-2, and a reserved hole is provided in the first perforated plate 2-3. The first perforated plate 2-3 is rotatably connected to the piston rod end 10-2 of the drive mechanism 10.

[0031] The boom 1 is provided with a second perforated plate 1-1, and one end of the boom plate 2-1 is provided with a docking hole 2-1-1. The docking hole 2-1-1 is rotatably connected to the second perforated plate 1-1 by a pin. The other end of the boom plate 2-1 is provided with a first mounting hole 3 and a second mounting hole 4.

[0032] In this embodiment, an upper ear plate 2-1-2 is provided on the upper side of the arm plate 2-1 away from the docking hole 2-1-1. A second mounting hole 4 is provided inside the upper ear plate 2-1-2. There are two second mounting holes 4, and the distance between the two second mounting holes 4 is equal to the distance between the two positioning mounting holes 7. The design of the two second mounting holes 4 allows for the insertion of two second pins 9, making the connection between the adjustable gripper 5 and the first rotating arm 2 more stable. A first mounting hole 3 is provided inside the arm plate 2-1 below the upper ear plate 2-1-2.

[0033] The adjustable gripper 5 includes a connecting end 5-1 and a clamping end 5-2. The connecting end 5-1 has a fan-shaped plate structure, and the connecting mounting hole 6 is located on the lower side of the connecting end 5-1. The positioning mounting holes 7 are evenly spaced and distributed in a ring near the circumference of the fan-shaped plate of the connecting end 5-1. To ensure that the adjustable gripper 5 can rotate around the connecting mounting hole 6, the distance between the connecting mounting hole 6 and the positioning mounting hole 7 is equal to the distance between the first mounting hole 3 and the second mounting hole 4, and the distance between each positioning mounting hole 7 and the connecting mounting hole 6 is also equal.

[0034] In this embodiment, the inner side of the clamping end 5-2 is also provided with anti-slip texture.

[0035] In this embodiment, the connecting end 5-1 is provided with a clearance edge 5-3 on the side near the stick 1, which can ensure that when the adjustable gripper 5 and the first rotating arm 2 are adjusted to the maximum opening angle, the connecting end 5-1 will not exceed the lower edge of the arm plate 2-1, so as to avoid interference when clamping objects.

[0036] In this embodiment, three adjustable grippers 5 are provided, and the adjustable grippers 5 are fixedly connected together by a fixing rod 11. During assembly, the connecting mounting hole 6 is aligned with the first mounting hole 3, and the positioning mounting hole 7 is aligned with one of the second mounting holes 4. Then, the first pin 8 is passed through all the connecting mounting holes 6 and the first mounting hole 3 to connect all the adjustable grippers 5 to the first rotating arm 2. The second pin 9 is then passed through all the positioning mounting holes 7 and the second mounting hole 4 to connect all the adjustable grippers 5 to the first rotating arm 2.

[0037] The working principle of this utility model is as follows:

[0038] First, the docking hole 2-1-1 and the second hole plate 1-1 are rotatably connected by a pin. The first pin 8 is used to connect the connecting mounting hole 6 and the first mounting hole 3 through the hole. The second pin 9 is used to connect the positioning mounting hole 7 and the second mounting hole 4 through the hole. The first hole plate 2-3 and the piston rod end 10-2 of the drive mechanism 10 are rotatably connected by a pin. When the object is gripped by the thumb clamp, the extension and retraction of the piston rod end 10-2 will push the first rotating arm 2 and the adjustable gripper 5 to rotate, thereby clamping the object on the bucket. When it is necessary to adjust the curvature of the thumb clamp (i.e., adjust the angle between the first rotating arm 2 and the adjustable jaw 5), remove the second pin 9, so that the adjustable jaw 5 rotates around the first pin 8 at a certain angle. Align the positioning mounting holes 7 in other positions with the second mounting holes 4, and then reinsert the second pin 9 to connect it. This will achieve the purpose of adjusting the angle between the first rotating arm 2 and the adjustable jaw 5, so that the adjustable jaw 5 can be clamped at a suitable angle on the underside of cylindrical objects such as logs or stone pillars, and the clamping will be more secure and less likely to fall off.

[0039] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A hydraulic thumb clamp for excavators, characterized in that: Includes a stick (1), which is rotatably connected to one end of a first rotating arm (2), and the other end of the first rotating arm (2) is detachably connected to an adjustable gripper (5). The first rotating arm (2) is provided with a first mounting hole (3) and a second mounting hole (4). The adjustable gripper (5) is provided with a connecting mounting hole (6) and a plurality of positioning mounting holes (7). The positioning mounting holes (7) are distributed in an evenly spaced ring on the upper side of the connecting mounting hole (6). The connecting mounting hole (6) is connected to the first mounting hole (3) by a first pin (8). The positioning mounting hole (7) is connected to the second mounting hole (4) by a second pin (9). The first rotating arm (2) is connected to a drive mechanism (10) that is rotatably connected to the stick (1).

2. The excavator hydraulic thumb clamp according to claim 1, characterized in that: The first rotating arm (2) includes two parallel arm plates (2-1), and a reinforcing cross plate (2-2) is fixedly connected between the two arm plates (2-1). A first perforated plate (2-3) is provided on the reinforcing cross plate (2-2), and a reserved hole is provided in the first perforated plate (2-3). The first perforated plate (2-3) is connected to the driving mechanism (10). The boom (1) is provided with a second perforated plate (1-1), and one end of the arm plate (2-1) is provided with a docking hole (2-1-1). The docking hole (2-1-1) and the second perforated plate (1-1) are rotatably connected by a pin. The other end of the arm plate (2-1) is provided with the first mounting hole (3) and the second mounting hole (4).

3. The excavator hydraulic thumb clamp according to claim 2, characterized in that: An upper ear plate (2-1-2) is provided on the upper side of the arm plate (2-1) away from the docking hole (2-1-1), and the second mounting hole (4) is provided in the upper ear plate (2-1-2); The first mounting hole (3) is located in the arm plate (2-1) below the upper ear plate (2-1-2).

4. The excavator hydraulic thumb clamp according to claim 1, characterized in that: The adjustable gripper (5) includes a connecting end (5-1) and a clamping end (5-2). The connecting end (5-1) has a fan-shaped plate structure. The connecting mounting hole (6) is located on the lower side of the connecting end (5-1). The positioning mounting holes (7) are evenly spaced and distributed in a ring at positions close to the circumference of the fan-shaped plate of the connecting end (5-1). The distance between the connecting mounting hole (6) and the positioning mounting hole (7) is equal to the distance between the first mounting hole (3) and the second mounting hole (4), and the distance between each positioning mounting hole (7) and the connecting mounting hole (6) is equal.

5. The excavator hydraulic thumb clamp according to claim 4, characterized in that: The inner side of the clamping end (5-2) is provided with anti-slip texture.

6. The excavator hydraulic thumb clamp according to claim 4, characterized in that: The connecting end (5-1) is provided with a clearance side (5-3) on the side near the stick (1).

7. The excavator hydraulic thumb clamp according to claim 1, characterized in that: Multiple adjustable grippers (5) are provided, and the adjustable grippers (5) are fixedly connected to each other by a fixing rod (11); The first pin (8) passes through all the connecting mounting holes (6) and the first mounting hole (3) and then connects all the adjustable jaws (5) to the first rotating arm (2); The second pin (9) passes through all the positioning mounting holes (7) and the second mounting hole (4) and then connects all the adjustable jaws (5) to the first rotating arm (2).

8. The excavator hydraulic thumb clamp according to claim 1, characterized in that: The driving mechanism (10) is a hydraulic cylinder. The driving mechanism (10) includes a cylinder end (10-1) and a piston rod end (10-2). The cylinder end (10-1) is rotatably connected to the boom (1), and the piston rod end (10-2) is rotatably connected to the first rotating arm (2).

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