Thumb clip

Abstract

The utility model discloses a thumb clamp, and belongs to the technical field of excavator accessories. Comprising a base, a movable jaw in rotary connection is arranged at one end of the base, an oil cylinder base is arranged at the other end of the base, an oil cylinder fixing sleeve is arranged on the movable jaw, a movable jaw lock seat in fixed connection is arranged on the oil cylinder fixing sleeve, a lock seat is arranged at the position, corresponding to the base, of the movable jaw lock seat, and a retaining valve is arranged on an oil cylinder assembly in the axial direction of an oil cylinder. The thumb clamp has the function of fixing materials and is provided with a fixing base, the overall strength is high, the thumb clamp can be directly welded to an excavator arm, the improvement cost is low, and adaptability is high. The safety valve group and the retaining valve are arranged on the oil cylinder, so that the movable jaw keeps the oil cylinder pressure at a certain angle so as to maintain the angle, the potential safety hazard caused by sudden loosening of the thumb clamp after the oil pipe is broken in the working process is avoided, and the safety coefficient of workers is improved.

Description

Technical Field

[0001] The utility model relates to a thumb clamp and belongs to the technical field of excavator accessories. Background Art

[0002] Excavators are widely used in the field of engineering construction, for road opening, trenching, demolition and other work, which can greatly improve work efficiency. They are usually equipped with different types of attachments for different types of operations, but buckets are still the main attachments in the operation. However, buckets generally have poor gripping of long materials. At present, the common form in the industry is to modify the bucket by adding a small bucket clamp to the bucket to achieve material gripping. However, this type of modification requires the entire bucket to be replaced, and the adapted clamp is small and has poor gripping performance. Due to the shaft connection between the bucket and the forearm, this type of modified clamp cannot be completely retracted, the operation is complicated, and the effect is poor. Therefore, it is necessary to design a thumb clamp to solve the above problems. Utility Model Content

[0003] The utility model provides a thumb clamp in view of the deficiencies in the prior art.

[0004] The technical solution of the utility model to solve the above technical problems is as follows:

[0005] A thumb clamp comprises a base, one end of the base is provided with a movable jaw which is rotatably connected, and the other end is provided with a cylinder base, the movable jaw is provided with a cylinder fixing sleeve, the cylinder fixing sleeve is provided with a fixedly connected movable jaw lock seat, a lock seat is provided at a base position corresponding to the movable jaw lock seat, and a retaining valve is provided on the cylinder assembly along the axial position of the cylinder.

[0006] Furthermore, a safety valve is provided on the outside of the oil cylinder assembly.

[0007] Furthermore, a fixed shaft is provided between the oil cylinder base and the oil cylinder for connecting.

[0008] Furthermore, a double-hole fixing plate is provided on one side of the fixed shaft.

[0009] Furthermore, the double-hole fixing plate is fixedly connected to the fixing shaft.

[0010] Furthermore, a fixed pin is provided between the lock seat and the movable jaw lock seat.

[0011] Furthermore, the movable jaw is rotationally connected to the base via a main shaft.

[0012] Furthermore, the base is connected to the excavator arm.

[0013] Compared with the prior art, the utility model has the following beneficial effects: the thumb clamp has the function of fixing materials, preventing material displacement before the excavator digs, preventing material from falling during transportation, easy to transport, and high work efficiency; the thumb clamp is fixed to the excavator arm as a whole and can be completely retracted, and will not affect the normal operation of the excavator when the thumb clamp is not in use; the thumb clamp has a fixed base with high overall strength and can be directly welded to the excavator arm, with low modification cost and strong adaptability; a safety valve group and a holding valve are provided on the oil cylinder to keep the movable jaw at a certain angle of the oil cylinder pressure to maintain the angle, thereby avoiding the safety hazard caused by the sudden loosening of the thumb clamp after the oil pipe breaks during work, and improving the safety factor of the staff; a mechanical lock is designed, and the movable jaw lock seat and the lock seat It can be locked by fixing the pin shaft. In the retracted state, the mechanical locking device can be used to lock the structure in the event of a cylinder rupture and valve group failure to avoid misoperation; the movable jaw lock seat is welded to the movable jaw cylinder fixing sleeve. Compared with the existing hole opened on the movable jaw main plate, this part of the structure is added, and the overall rigidity and strength are higher, which effectively avoids the deformation of the movable jaw cantilever caused by excessive length and the fracture of the connection during use; the double-hole fixing plate is welded to one end of the fixed shaft of the cylinder base. The bolt fixing hole of this structure is far away from the center of the pin shaft, has a longer fixing force arm, and has higher anti-torsion characteristics, which fundamentally avoids the shaking caused by the bolt through-hole processed along the axial diameter direction on the traditional fixing sleeve, which leads to the occurrence of problems such as bolt breakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model.

[0015] Figure 2 It is a structural schematic diagram of the movable jaw lock seat part of the utility model.

[0016] In the figure, 1. movable jaw; 11. movable jaw lock seat; 2. base; 21. cylinder base; 3. cylinder assembly; 31. holding valve; 32. safety valve; 33. cylinder fixing sleeve; 4. main shaft; 5. double-hole fixing plate; 6. lock seat; 61. fixing pin shaft. DETAILED DESCRIPTION

[0017] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0018] In order to make the purpose, technical scheme and advantages of the utility model clearer, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. All other embodiments obtained by ordinary personnel in this field without making creative work belong to the protection scope of the utility model. The preferred implementation of the utility model will be described in more detail below with reference to the drawings. Although the preferred implementation of the utility model is shown in the drawings, it should be understood that the utility model can be implemented in various forms and should not be limited by the implementation described here. On the contrary, these implementations are provided to make the utility model more thorough and complete, and to fully convey the scope of the utility model to those skilled in the art.

[0019] The terms used in the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The singular forms "a", "the" and "the" used in the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0020] like Figure 1-Figure 2 As shown, a thumb clamp comprises a base 2, one end of the base 2 is provided with a rotatably connected movable jaw 1, and the other end is provided with a cylinder base 21, the movable jaw 1 is provided with a cylinder fixing sleeve 33, the cylinder fixing sleeve 33 is provided with a fixedly connected movable jaw lock seat 11, a lock seat 6 is provided at the position of the base 2 corresponding to the movable jaw lock seat 11, a retaining valve 31 is provided on the cylinder assembly 3 along the axial position of the cylinder, and a safety valve is provided on the outer side of the cylinder assembly 3.

[0021] A fixed shaft is provided between the oil cylinder base 21 and the oil cylinder for connection.

[0022] A double-hole fixing plate 5 is provided on one side of the fixing shaft.

[0023] The double-hole fixing plate 5 is fixedly connected to the fixing shaft.

[0024] A fixing pin 61 is provided between the lock seat 6 and the movable jaw lock seat 11 .

[0025] The movable jaw 1 is rotatably connected to the base 2 via a main shaft 4 .

[0026] The base 2 is connected to the excavator arm.

[0027] During operation, the thumb clamp fixing base 2 can be directly welded to the excavator arm. The thumb clamp is output through the power of the excavator hydraulic assembly, and the hydraulic motor drives the cylinder to extend and retract. The cylinder pushes the movable jaw 1 to move around the main shaft 4 until the thumb clamp fixes the material and restricts the movement of the material, thereby realizing the grabbing action of the movable jaw 1. The safety valve 32 and the holding valve 31 are provided on the cylinder to make the movable jaw 1 maintain the cylinder pressure at a certain angle to maintain the angle, thereby avoiding the safety hazard caused by the sudden release of the thumb clamp after the oil pipe breaks during operation. When the thumb clamp is in the retracted state, the movable jaw lock seat 11 and the lock seat 6 can be locked by the fixed pin shaft 61. The mechanical locking device can be used to lock the structure when the cylinder ruptures and the valve group fails to work, thereby avoiding misoperation.

[0028] The thumb clamp has the function of fixing materials, preventing material displacement before the excavator digs, and preventing material from falling during transportation. It is easy to transport and has high work efficiency. The thumb clamp is fixed to the excavator arm as a whole and can be completely retracted. When the thumb clamp is not in use, it will not affect the normal operation of the excavator. The thumb clamp has a fixed base 2 with high overall strength and can be directly welded to the excavator arm. The modification cost is low and the adaptability is strong. The safety valve 32 and the holding valve 31 are provided on the oil cylinder to keep the cylinder pressure of the movable jaw 1 at a certain angle to maintain the angle, thereby avoiding the safety hazard caused by the sudden loosening of the thumb clamp after the oil pipe breaks during work, thereby improving the safety factor of the staff. The design is mechanically locked, and the movable jaw lock seat 11 and the lock seat 6 can be locked by the fixed pin shaft 61. In the retracted state, a mechanical locking device can be used to lock the structure in the event of a cylinder rupture and valve group failure to avoid misoperation; the movable jaw lock seat 11 is welded to the movable jaw 1 cylinder fixing sleeve 33. Compared with the existing method of opening a hole on the movable jaw 1 main board, this part of the structure is added, and the overall rigidity and strength are higher, which effectively avoids the deformation of the movable jaw 1 cantilever that is too long and the fracture of the connection during use; the double-hole fixing plate 5 is welded to one end of the fixed shaft of the cylinder base 21. The bolt fixing hole of this type of structure is far away from the center of the pin shaft, has a longer fixing force arm, and has higher anti-torsion characteristics, which fundamentally avoids the shaking caused by the bolt through-hole processed along the axial diameter direction on the traditional fixing sleeve, which in turn leads to the occurrence of problems such as bolt breakage.

[0029] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A thumb clip, comprising a base (2), characterized in that: A rotatably connected movable jaw (1) is provided at one end of the base (2), and a cylinder base (21) is provided at the other end; a cylinder assembly (3) is provided between the cylinder base (21) and the movable jaw (1); a cylinder fixing sleeve (33) is provided on the movable jaw (1); a movable jaw locking seat (11) is fixedly connected to the cylinder fixing sleeve (33); a locking seat (6) is provided at a position of the base (2) corresponding to the movable jaw locking seat (11); and a retaining valve (31) is provided on the cylinder assembly (3) along the axial direction of the cylinder.

2. The thumb clip according to claim 1, characterized in that: A safety valve (32) is provided on the outside of the oil cylinder assembly (3).

3. The thumb clip according to claim 1, characterized in that: A fixed shaft for connecting is provided between the oil cylinder base (21) and the oil cylinder.

4. The thumb clip according to claim 3, characterized in that: A double-hole fixing plate (5) is provided on one side of the fixing shaft.

5. The thumb clip according to claim 4, characterized in that: The double-hole fixing plate (5) is fixedly connected to the fixing shaft.

6. The thumb clip according to claim 1, characterized in that: A fixed pin shaft (61) is provided between the lock seat (6) and the movable jaw lock seat (11).

7. The thumb clip according to claim 1, characterized in that: The movable jaw (1) is rotatably connected to the base (2) via a main shaft (4).

8. The thumb clip according to claim 1, characterized in that: The base (2) is connected to the excavator arm.

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