Extended-range pressing device

Abstract

The utility model relates to a range-extending pressing device which comprises a hydraulic cylinder and further comprises a pressing base, a pressing rod, a pressing rod and a pressing rod, the moving seat is arranged on the pressing base in a sliding manner and is connected with the hydraulic cylinder; the rotating seat is arranged on the moving seat; the pressing rod is rotationally arranged on the rotating seat and is provided with an L-shaped displacement groove; the displacement shaft is movably arranged in the displacement groove; the displacement device is arranged on the moving seat, is connected with the displacement shaft and is used for driving the displacement shaft to move in the displacement groove; the driving wedge is arranged on the pressing base and is opposite to the displacement device; when the hydraulic cylinder stretches out, the displacement device pushes the pressing rod to press the workpiece through the displacement shaft and the displacement groove, and when the hydraulic cylinder retracts, the wedge is driven to push the displacement device, so that the displacement shaft enables the pressing rod to turn over in the direction away from the workpiece through the displacement groove. The device can effectively increase the stroke, can be used for occasions with compact space, and is simple in structure, few in parts, low in cost and small in pressing force loss.

Description

Technical Field

[0001] The utility model relates to a clamping device, in particular to a range-extending clamping device. Background Art

[0002] Existing hydraulic range-extending mechanisms mostly use a lever structure to increase the stroke, such as a lever cylinder assembly for clamping disclosed in CN 220806313 U, which includes a cylinder body, a screw is provided at the top of the cylinder body near the side, a bracket is fixed to the top of the cylinder body by the screw, the bracket and the output shaft of the cylinder body are staggered, a push rod is provided at the top of the output shaft of the cylinder body, a connecting block is fixedly sleeved on the surface of the push rod, a side chain 2 is movably provided at a position near one end of the two side surfaces of the connecting block, a side chain 3 is movably provided at a position near the other opposite end of the two side surfaces of the connecting block, a pressure head is rotatably provided at the end of the side chain 2 away from the connecting block, the top of the push rod is located directly below the pressure head, the side chain 2 is rotatably connected to the end of the pressure head closest to the output shaft of the cylinder body, the two side surfaces of the pressure head are rotatably provided with a side chain 1 near the connection position between the side chain 2 and the cylinder body, the bottom end of the side chain 1 is rotatably connected to the top of the bracket, and the end of the side chain 3 away from the connecting block is rotatably connected to the side of the side chain 1. Although it solves the problem that the existing lever-type pressing cylinder or rotary pressing cylinder has a shortcoming that the stroke of the pressing head is the highest when it is tilted upward and the stroke of the pressing head is the lowest when it is pressed downward, thus affecting the clamping length of the processing tool, the lever structure leads to a complex structure, more parts and higher costs. Utility Model Content

[0003] In order to solve the above problems of complex structure, many parts and high cost, the utility model provides an extended-range clamping device, and the specific technical solution is as follows:

[0004] A range-extending clamping device comprises a hydraulic cylinder, and also includes: a clamping base, the hydraulic cylinder is arranged on the clamping base; a moving seat, slidably arranged on the clamping base and connected to the hydraulic cylinder; a rotating seat, arranged on the moving seat; a clamping rod, rotatably arranged on the rotating seat and provided with an L-shaped displacement groove; a displacement shaft, movably arranged in the displacement groove; a displacement device, arranged on the moving seat and connected to the displacement shaft, for driving the displacement shaft to move in the displacement groove; and a driving wedge, arranged on the clamping base and arranged opposite to the displacement device; wherein, when the hydraulic cylinder is extended, the displacement device pushes the clamping rod to clamp the workpiece through the displacement shaft and the displacement groove, and when the hydraulic cylinder is retracted, the driving wedge pushes the displacement device to make the displacement shaft pass through the displacement groove to make the clamping rod flip in the direction away from the workpiece.

[0005] Preferably, the displacement device comprises: a displacement seat, which is arranged on the movable seat; a driving shaft, which is movably arranged on the displacement seat and connected to the displacement shaft; and a displacement spring, which is movably arranged between the driving shaft and the displacement seat.

[0006] Preferably, the bottom of the driving shaft is arc-shaped.

[0007] Preferably, the rotating seat is further provided with a waist-shaped guide groove, and both ends of the displacement shaft are movably inserted into the guide groove.

[0008] Preferably, it further comprises: a transverse rod, which is arranged on the clamping rod; and clamping blocks, which are arranged at both ends of the transverse rod.

[0009] Compared with the prior art, the utility model has the following beneficial effects:

[0010] The utility model provides a range-extending clamping device which can effectively increase the travel and be used in compact space occasions, and at the same time has a simple structure, fewer parts, low cost, and small clamping force loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a stereogram of the first viewing angle of the present application;

[0012] Figure 2 It is a stereogram of the second viewing angle of the present application;

[0013] Figure 3 is a cross-sectional view of the present application in a compressed state;

[0014] Figure 4 is a top view of the present application in a compacted state;

[0015] Figure 5 is a cross-sectional view of the present application in a released state;

[0016] Figure 6 is a top view of the application in a released state;

[0017] Figure 7 It is a schematic diagram of the assembly of the pressing rod and the displacement device;

[0018] Figure 8 It is a structural schematic diagram of the clamping rod. DETAILED DESCRIPTION

[0019] The utility model is now further described with reference to the accompanying drawings.

[0020] like Figures 1 to 8As shown, an extended-range clamping device includes a hydraulic cylinder 2, a clamping base 1, a movable base 4, a rotating base 5, a clamping rod 7, a displacement shaft 63, a displacement device and a driving wedge 66. The hydraulic cylinder 2 is installed on one side of the clamping base 1 and is located at the top of the clamping base 1; the movable base 4 is slidably installed on the top of the clamping base 1 through two linear guide pairs, and the movable base 4 is connected to the hydraulic cylinder 2 through a connecting base 3. The connecting base 3 is located below the clamping base 1 and is U-shaped, so as not to interfere with the components on the top of the clamping base 1; the rotating base 5 is installed on the top of the movable base 4, and a rotating groove 51 is provided inside the rotating base 5. One end of the clamping rod 7 is movably inserted in the rotating groove 51 and is rotatably connected to the rotating base 5 through a rotating shaft 65. The clamping rod 7 is L-shaped, and a displacement groove 71 is provided at the bottom of the clamping rod 7. The displacement groove 71 is L-shaped, and the displacement groove 71 is located in the rotating groove 51, and the displacement groove 71 is also located below the rotating shaft 65; the displacement shaft 63 is movably inserted in the displacement groove 71 and is connected to the displacement device, which is installed on the moving seat 4 and is used to drive the displacement shaft 63 to move in the displacement groove 71; the driving wedge 66 is installed on the clamping base 1 and is arranged opposite to the displacement device; when the hydraulic cylinder 2 is extended, the displacement device pushes the clamping rod 7 to clamp the workpiece through the displacement shaft 63 and the displacement groove 71, and when the hydraulic cylinder 2 is retracted, the driving wedge 66 pushes the displacement device to make the displacement shaft 63 pass through the displacement groove 71 to flip the clamping rod 7 in the direction away from the workpiece.

[0021] Among them, the displacement device includes a displacement seat 61, a driving shaft 62 and a displacement spring. The displacement seat 61 is installed on the moving seat 4, and the driving shaft 62 is movably inserted in the displacement seat 61. The driving shaft 62 is a stepped shaft, and the bottom of the driving shaft 62 is arc-shaped. The top of the driving shaft 62 is connected to the displacement shaft 63. The displacement spring is movably sleeved on the driving shaft 62, and the two ends are respectively against the shoulders of the displacement seat 61 and the driving shaft 62, which is used to keep the driving shaft 62 in a downward trend, so that the displacement shaft 63 is located at the bottom of the displacement groove 71, so that the clamping rod 7 is in a vertical state.

[0022] In order to further improve the stability and reduce the radial force of the driving shaft 62 , a waist-shaped guide groove 52 is further provided on the rotating seat 5 . The guide groove 52 is communicated with the rotating groove 51 , and both ends of the displacement shaft 63 are movably inserted in the guide groove 52 .

[0023] A transverse rod 81 is also mounted at the end of the clamping rod 7 , and clamping blocks 82 are mounted at both ends of the transverse rod 81 . The clamping blocks 82 are used to clamp the workpiece.

[0024] like Figure 5 and Figure 6As shown, when the workpiece is loaded, the piston rod of the hydraulic cylinder 2 is in a retracted state, and the bottom of the driving shaft 62 is against the inclined surface of the driving wedge 66. The driving shaft 62 makes the displacement shaft 63 be in the highest position of the displacement groove 71, thereby making the clamping rod 7 in a flipped state and flipping in the direction away from the workpiece, thereby increasing the distance between the clamping rod 7 and the workpiece, facilitating the clamping of the workpiece, and realizing the extended range.

[0025] like Figure 3 and Figure 4 As shown, when the workpiece is pressed, the piston rod of the hydraulic cylinder 2 is in an extended state, and the drive shaft 62 drives the displacement shaft 63 to drop to the lowest position of the displacement groove 71 under the action of the displacement spring, so that the clamping rod 7 is in a vertical state and pressed on the workpiece.

[0026] The stroke of the entire clamping device is increased, the structure is simple, and it can be used in places with compact space. The trajectory of the clamping block 82 is horizontal movement, the force is better, and the clamping force generated by the clamping block 82 is equivalent to that of the hydraulic cylinder 2, and the clamping force loss is small.

[0027] The technical principle of the present invention is described above in combination with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the protection scope of the present invention in any way. Based on the explanations here, technicians in this field can think of other specific implementation methods of the present invention without creative work, and these methods will fall within the protection scope of the claims of the present invention.

Claims

1. A range-extending clamping device, comprising a hydraulic cylinder (2), characterized in that: Also includes: A pressing base (1), wherein the hydraulic cylinder (2) is arranged on the pressing base (1); A movable seat (4) is slidably disposed on the pressing base (1) and is connected to the hydraulic cylinder (2); A rotating seat (5) is arranged on the movable seat (4); A pressing rod (7) is rotatably mounted on the rotating seat (5) and is provided with an L-shaped displacement groove (71); A displacement shaft (63) movably disposed in the displacement groove (71); A displacement device, which is arranged on the movable seat (4) and connected to the displacement shaft (63), and is used to drive the displacement shaft (63) to move in the displacement groove (71); as well as A driving wedge (66) is arranged on the pressing base (1) and is arranged opposite to the displacement device; When the hydraulic cylinder (2) is extended, the displacement device pushes the clamping rod (7) to clamp the workpiece through the displacement shaft (63) and the displacement groove (71); when the hydraulic cylinder (2) is retracted, the driving wedge (66) pushes the displacement device to make the displacement shaft (63) pass through the displacement groove (71) so that the clamping rod (7) flips in a direction away from the workpiece.

2. The extended-range clamping device according to claim 1, characterized in that: The displacement device comprises: A displacement seat (61) is arranged on the movable seat (4); A driving shaft (62) is movably disposed on the displacement seat (61) and connected to the displacement shaft (63); and The displacement spring is movably arranged between the driving shaft (62) and the displacement seat (61).

3. The extended-range clamping device according to claim 2, characterized in that: The bottom of the driving shaft (62) is in an arc shape.

4. The extended-range clamping device according to claim 1, characterized in that: The rotating seat (5) is also provided with a waist-shaped guide groove (52), and the two ends of the displacement shaft (63) are also movably inserted into the guide groove (52).

5. The extended-range clamping device according to any one of claims 1 to 4, characterized in that: Also includes: A transverse rod (81) is arranged on the pressing rod (7); as well as The pressing blocks (82) are arranged at both ends of the transverse rod (81).

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