Self-locking type clamping device

Abstract

The utility model provides a self-locking type clamping device which comprises a shell, a locking block and a pressing head are installed in the shell, the locking block is located above the pressing head, the locking block is in wedge-shaped fit with the rear end of the pressing head, an oil cylinder barrel is installed at the rear end of the shell, a piston is installed in the oil cylinder barrel, a guide sleeve is installed at the front end of the piston, a piston rod is installed on the piston, and the piston rod is connected with the pressing head. The front end of the piston rod penetrates through the guide sleeve and then is fixedly connected with the rear end of the locking block, the rear end of the oil cylinder barrel is sealed through an oil cylinder cover, a first oil inlet hole communicated with the oil cylinder barrel is formed in the shell, a second oil inlet hole communicated with the oil cylinder barrel is formed in the oil cylinder cover, and a push rod parallel to the piston is installed on the outer side of the oil cylinder barrel. The front end of the push rod is fixedly connected with the rear end of the pressing head through a fixing block, and the rear end of the push rod is connected with the piston through a connecting rod. The self-locking type clamping device is reasonable in design, simple in structure, easy in pressure maintaining and high in bearing capacity, and a self-locking oil way is easy to control.

Description

Technical Field

[0001] The utility model relates to the technical field of clamping equipment, in particular to a self-locking clamp. Background Art

[0002] With advances in industrial automation technology, hydraulic clamping systems are increasingly being used. However, practical applications still present challenges, primarily in two areas. First, there's the issue of maintaining pressure. Ensuring absolute leak-free hydraulic systems under prolonged impact and heavy loads is extremely difficult. Second, there's the issue of improper force distribution on the clamping components. The piston rod of the swing-angle clamping cylinder is subject to bending moments in addition to tension, necessitating high strength and rigidity requirements. The hinged support of the lever cylinder must withstand more than twice the compression force. To mitigate the system's pressure requirements, some self-locking cylinders are currently available, but some have low load capacities and some have complex self-locking circuitry. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the utility model proposes a self-locking clamp, which is easy to maintain pressure, has a high load-bearing capacity, and simple to control the self-locking oil circuit.

[0004] The utility model provides a self-locking clamp, comprising: a shell, a locking block and a pressure head installed in the shell, the locking block is located above the pressure head, and the locking block and the rear end of the pressure head are wedge-fitted, the rear end of the shell is installed with a cylinder barrel, a piston is installed in the cylinder barrel, a guide sleeve is installed at the front end of the piston, a piston rod is installed on the piston, the front end of the piston rod passes through the guide sleeve and is fixedly connected to the rear end of the locking block, the rear end of the cylinder barrel is sealed by a cylinder cover, a first oil inlet hole connected to the cylinder barrel is provided on the shell, a second oil inlet hole connected to the cylinder barrel is provided on the cylinder cover, a push rod arranged parallel to the piston is installed on the outside of the cylinder barrel, the front end of the push rod is fixedly connected to the rear end of the pressure head through a fixing block, and the rear end of the push rod is connected to the piston through a connecting rod.

[0005] In the above technical solution, during actual operation, when the workpiece needs to be compressed, hydraulic oil enters the cylinder barrel from the second oil inlet hole set on the cylinder head, pushing the piston forward. During the forward movement, the piston first drives the push rod forward to push the pressure head forward so that the pressure head extends out of the shell. At the same time, the piston drives the piston rod to push the locking block forward. Since the locking block and the rear end of the pressure head form a wedge fit, when the locking block moves forward, it will apply downward pressure to the pressure head, causing the locking block to compress the pressure head. When resetting is required, the second oil inlet hole stops supplying oil, and hydraulic oil enters the cylinder barrel from the first oil inlet hole set on the shell, pushing the piston backward. During the backward movement, the piston first drives the locking block backward through the piston rod to release the pressure head. Then, during the backward movement, the piston drives the pressure head to reset through the push rod. This structural design not only increases the self-locking ability of the pressure head, but also simplifies the oil circuit control and makes it easy to maintain pressure.

[0006] Preferably, a linear bearing is installed in the housing, and the front end of the push rod passes through the linear bearing and is fixedly connected to the rear end of the pressure head through a fixed block to ensure that the push rod moves linearly.

[0007] Preferably, a detection plate is installed on the push rod, and a travel switch is installed on the housing. The travel switch is arranged opposite to the detection plate. By arranging the travel switch, the accuracy of the pressure head movement control can be effectively enhanced.

[0008] Preferably, the housing and the cylinder cover are both provided with exhaust valve holes connected to the piston movable chamber, which can timely empty the piston movable chamber and ensure accurate oil pressure.

[0009] Preferably, a hoisting hole is provided on the top of the shell to facilitate the hoisting of the self-locking clamp.

[0010] The self-locking clamp provided by the present invention has the following beneficial effects: the self-locking clamp has a reasonable design, a simple structure, easy pressure maintenance, a high load-bearing capacity, and simple self-locking oil circuit control. In actual operation, when a workpiece needs to be compressed, hydraulic oil enters the cylinder barrel through the second oil inlet provided on the cylinder head, pushing the piston forward. During the forward movement of the piston, the piston first drives the push rod forward to push the pressure head forward so that the pressure head extends out of the housing. At the same time, the piston drives the piston rod to push the locking block forward. Due to the wedge-shaped fit between the locking block and the rear end of the pressure head, when the locking block moves forward, it exerts downward pressure on the pressure head, causing the locking block to compress the pressure head. When resetting is required, the second oil inlet stops supplying oil, and hydraulic oil enters the cylinder barrel through the first oil inlet provided on the housing, pushing the piston backward. During the backward movement of the piston, the piston first drives the locking block backward through the piston rod, releasing the pressure head. Then, during the backward movement of the piston, the piston drives the pressure head to reset through the push rod. This structural design not only increases the self-locking ability of the pressure head, but also simplifies the oil circuit control and makes it easy to maintain pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a cross-sectional view of the internal structure of the utility model.

[0012] Figure 2 It is a top view of the present utility model.

[0013] Figure 3 It is a rear view of the present utility model.

[0014] Figure 4 It is a front view of the present utility model.

[0015] Figure 5 It is a schematic diagram of the work flow of the present utility model.

[0016] In the figure: 1. Housing; 2. First oil inlet hole; 3. Guide sleeve; 4. Piston rod; 5. Piston; 6. Second oil inlet hole; 7. Cylinder cover; 8. Cylinder barrel; 9. Detection plate; 10. Push rod; 11. Linear bearing; 12. Fixing block; 13. Pressure head; 14. Locking block; 15. Lifting hole; 16. Exhaust valve hole; 17. Mounting bracket; 18. Travel switch. DETAILED DESCRIPTION

[0017] The following is a clear and complete description of the technical solutions in the embodiments of the present invention, in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary persons in this field without creative work are within the scope of protection of the present invention.

[0018] Embodiment: A self-locking clamp.

[0019] Reference Figures 1 to 5 As shown, a self-locking clamp comprises: a shell 1, in which a locking block 14 and a pressure head 13 are installed, the locking block 14 is located above the pressure head 13, and the locking block 14 and the rear end of the pressure head 13 are wedge-shaped, so that the locking block 14 can continuously apply a downward pressure to the pressure head 13 during the continuous forward movement, thereby realizing the self-locking of the pressure head 13, and the rear end of the shell 1 is installed with an oil cylinder 8, in which a piston 5 is installed, and a guide sleeve 3 is installed at the front end of the piston 5, and a piston rod 4 is installed on the piston 5, and the front end of the piston rod 4 passes through the guide sleeve 3 and is fixedly connected to the rear end of the locking block 14, so that the piston 5 can drive the locking block 14 to move forward and backward, and the rear end of the oil cylinder 8 is sealed by the cylinder cover 7. , the shell 1 is provided with a first oil inlet hole 2 connected with the oil cylinder 8, and the cylinder cover 7 is provided with a second oil inlet hole 6 connected with the oil cylinder 8. During actual operation, when oil flows into the first oil inlet hole 2, the piston 5 moves backward, and when oil flows into the second oil inlet hole 6, the piston 5 moves forward. A push rod 10 arranged parallel to the piston 5 is installed on the outside of the oil cylinder 8, and the rear end of the push rod 10 is connected to the piston 5 through a connecting rod. A linear bearing 11 is installed in the shell 1, and the front end of the push rod 10 passes through the linear bearing 11 and is fixedly connected to the rear end of the pressure head 13 through a fixed block 12. During actual operation, the piston 5 can drive the push rod 10 to move, and the push rod 10 drives the pressure head 13 to move. By setting the linear bearing 11, the linear movement of the push rod 10 can be ensured.

[0020] In this embodiment, a detection plate 9 is mounted on the push rod 10, and a travel switch 18 is mounted on the housing 1. This travel switch 18 is positioned opposite the detection plate 9. The presence of this travel switch 18 effectively enhances the precision of the movement control of the ram 13. Both the housing 1 and the cylinder head 7 are provided with an exhaust valve hole 16 connected to the active cavity of the piston 5, allowing for timely evacuation of the active cavity and ensuring accurate oil pressure. A lifting hole 15 is provided at the top of the housing 1 to facilitate the lifting of this self-locking clamp.

[0021] This self-locking clamp has a reasonable design, simple structure, easy pressure maintenance, high load-bearing capacity, and simple self-locking oil circuit control. In actual operation, when the workpiece needs to be compressed, the hydraulic oil enters the cylinder barrel 8 from the second oil inlet hole 6 set on the cylinder cover 7, pushing the piston 5 forward. During the forward movement, the piston 5 first drives the push rod 10 to push the pressure head 13 forward so that the pressure head 13 extends out of the housing 1. At the same time, the piston 5 drives the piston rod 4 to push the locking block 14 forward. Since the locking block 14 and the rear end of the pressure head 13 form a wedge-shaped fit, when the locking block 14 moves forward, it will apply a downward pressure to the pressure head 13, so that the locking block 14 will continue to compress the pressure head 13. When resetting is required, the second oil inlet hole 6 stops supplying oil, and hydraulic oil enters the cylinder 8 from the first oil inlet hole 2 provided in the housing 1, pushing the piston 5 backward. During this backward movement, the piston 5 first drives the locking block 14 backward via the piston rod 4, releasing the pressure head 13. Then, during this backward movement, the piston 5 drives the pressure head 13 to reset via the push rod 10. This structural design not only enhances the self-locking ability of the pressure head 13, but also simplifies the oil circuit control and facilitates pressure maintenance.

[0022] The above description is only a preferred embodiment of the present invention, but the present invention should not be limited to the contents disclosed in the embodiment and the drawings. Therefore, any equivalent or modification completed without departing from the spirit disclosed in the present invention shall fall within the scope of protection of the present invention.

Claims

1. A self-locking clamp, characterized in that include: The cam is secured to the cam face and is accessible through the cam face, and the cam face is secured to the cam face with respect to the oil pump, and the cam face is secured to the cam face.

2. The self-locking clamp according to claim 1, wherein: A linear bearing is installed in the housing, and the front end of the push rod passes through the linear bearing and is fixedly connected to the rear end of the pressure head through a fixing block.

3. The self-locking clamp according to claim 1, wherein: A detection plate is installed on the push rod, and a travel switch is installed on the shell. The travel switch is arranged opposite to the detection plate.

4. The self-locking clamp according to claim 1, wherein: The housing and the oil cylinder cover are both provided with exhaust valve holes which are in communication with the piston activity chamber.

5. The self-locking clamp according to claim 1, wherein: A lifting hole is provided on the top of the shell.

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