Clamping mechanism

Abstract

The utility model discloses a clamping mechanism which comprises a power cylinder, an installation seat, a pull rod and a lever, the lever is installed on the installation seat through a supporting shaft, and the two ends of the lever are connected to the power cylinder and the pull rod through a first kidney-shaped groove sliding rod mechanism and a second kidney-shaped groove sliding rod mechanism respectively. The pull rod penetrates through a guide channel, and the power cylinder can drive the lever to rotate around the supporting shaft so as to drive the pull rod to move along the guide channel. The supporting shaft is arranged on the side, close to the pull rod, of the lever or arranged on the side, close to the power cylinder, of the lever. By the adoption of the technical scheme, the clamping mechanism can change clamping force or response speed through a lever mechanism, the structure is simple, and a power cylinder does not need to be additionally customized.

Description

Technical Field

[0001] This utility model relates to a clamping mechanism and belongs to the field of machining technology. Background Technology

[0002] In the field of pipe forming, clamping mechanisms are typically used to clamp the pipes to be processed before operation. For example, the clamping assembly provided in the applicant's prior application CN108941341A includes a fixed clamp, a movable clamp hinged to the fixed clamp, and a rotating pressure rod. The rotating pressure rod is connected to a lifting cylinder via a feed coupling. A first planar thrust bearing is installed between the rotating pressure rod and the feed coupling. A steering mechanism is also provided between the fixed clamp and the rotating pressure rod to allow the rotating pressure rod to rotate around its axis during lifting. In this traditional clamping assembly, the clamping force depends entirely on the cylinder or hydraulic cylinder itself. When high clamping force is required, only custom-made cylinders with very large diameters can be selected. Furthermore, some applications do not require high clamping force but rather a faster clamping speed. Currently, the standard speed range for cylinders is 50–500 mm / s, which also necessitates custom-made cylinders with faster response times. It is evident that both greater clamping force and faster response speed require customized cylinders, which will have a significant negative impact on product reliability, production costs, and delivery cycle. Utility Model Content

[0003] Therefore, the purpose of this utility model is to provide a novel clamping mechanism that can change the clamping force or response speed through a lever mechanism.

[0004] To achieve the above objectives, the present invention provides a clamping mechanism comprising a power cylinder, a mounting base, a pull rod, and a lever. The lever is mounted on the mounting base via a support shaft, and both ends of the lever are connected to the power cylinder and the pull rod respectively via a first groove slide rod mechanism and a second groove slide rod mechanism. The pull rod passes through a guide channel, and the power cylinder can drive the lever to rotate around the support shaft, thereby moving the pull rod along the guide channel. The support shaft is located on the side of the lever near the pull rod, or on the side of the lever near the power cylinder.

[0005] The pull rod includes a rod body and a rotating component disposed on the rod body. The second waist groove slide mechanism includes a second waist groove disposed at the end of the lever and a second slide rod disposed on the rotating component. The second slide rod is inserted into the second waist groove.

[0006] The rotating component includes a rotating sleeve on the outside of the rod.

[0007] The lever has a U-shaped groove at its end, the rotating component is located in the U-shaped groove, the second waist groove is opened on the two side walls of the U-shaped groove, and there are two second slide rods, which are coaxially arranged on both sides of the rotating component.

[0008] One end of the second waist groove extends to the end of the sidewall of the U-shaped groove, thus forming a structure with one end open.

[0009] A sliding groove is provided on the side wall of the rod, and the sliding groove is at least partially inclined.

[0010] The guide channel is provided with a protrusion that can be inserted into the slide groove.

[0011] The cylinder body of the power cylinder is fixed to the mounting base by a connecting rod.

[0012] The extension direction of the telescopic arm of the power cylinder is parallel to the axial direction of the pull rod.

[0013] The clamping mechanism further includes a clamp assembly, which includes a first clamp and a second clamp. The pull rod passes through the first clamp and the second clamp, and a pressure block is provided at the end of the pull rod.

[0014] The pressing block is a T-shaped pressing block.

[0015] The first clamp is a movable part, the second clamp is a fixed part, and the pressure block can press on the end of the first clamp that is away from the second clamp.

[0016] The guide channel is provided on the second clamp.

[0017] By adopting the above technical solution, the clamping mechanism of this utility model changes the previous structure of direct connection between the power cylinder and the pull rod. Instead, it connects the power cylinder and the pull rod through a lever. When a larger pulling force is required from the pull rod, the support shaft is positioned on the side of the lever closer to the pull rod, amplifying the power of the power cylinder through the lever. When a faster response speed is required from the pull rod, the support shaft is positioned on the side of the lever closer to the power cylinder, allowing the power cylinder's telescopic arm to achieve a larger stroke on the pull rod side when the telescopic arm provides a smaller stroke. This clamping mechanism can change the clamping force or response speed through a lever mechanism, and its structure is relatively simple, requiring no additional customized power cylinder. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Figure 2 This is a cross-sectional view of the lever and tie rod assembly structure.

[0020] Figure 3This is a three-dimensional structural diagram of the present invention.

[0021] Figure 4 This is a cross-sectional view of the assembly structure of the first clamp, the second clamp, and the pull rod. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] like Figure 1-4 As shown, a clamping mechanism of this utility model includes a power cylinder 1, a mounting base 2, a pull rod 3, and a lever 4.

[0024] The power cylinder 1 can be a pneumatic cylinder or a hydraulic cylinder. The cylinder body of the power cylinder 1 is fixed to the lower part of the mounting base 2 by a connecting rod 19, and the telescopic rod of the power cylinder 1 is set vertically upward.

[0025] The lever 4 is mounted below the mounting base 2 via a support shaft 5. A first groove 6 and a second groove 7 are respectively provided at both ends of the lever 4. A U-shaped connector 8 is provided at the end of the telescopic rod. One end of the lever 4 extends into the inside of the U-shaped connector 8. A first sliding rod 9 is provided inside the U-shaped connector 8 and is inserted into the first groove 6. The first groove 6 and the first sliding rod 9 form a first groove sliding rod mechanism, allowing the first sliding rod 9 to slide along the first groove 6. Alternatively, in other embodiments, the first groove in the first groove sliding rod mechanism can also be located on the U-shaped connector 8, and the first sliding rod can also be located on the lever 4.

[0026] A through hole 10 is provided on the mounting base 2 for the pull rod 3 to pass vertically upward. The pull rod 3 includes a rod body 31 and a rotating component 32 disposed at the lower part of the rod body 31. The rotating component 32 is coaxially arranged with the rod body 31 and can rotate relative to it. In this embodiment, the rotating component 32 includes a rotating sleeve mounted on the outside of the rod body 31 via a bearing 33. Two second sliding rods 11 are coaxially arranged opposite each other on the side wall of the rotating sleeve. A U-shaped groove 41 is provided at the end of the lever 4. The rotating component 32 is located in the U-shaped groove 41. Second waist grooves 7 are respectively opened on the two side walls of the U-shaped groove 41. The second sliding rods 11 are inserted into the second waist grooves 7. In order to facilitate the installation and connection of the lever 4 and the rotating component 32, one end of the second waist groove 7 extends to the end of the side wall of the U-shaped groove 41, thereby forming an open structure at one end. The second waist groove 7 and the second sliding rods 11 form a second waist groove sliding rod mechanism, and the second sliding rods 11 can slide along the second waist groove 7. Of course, in other embodiments, the second waist groove in the second waist groove slide bar mechanism can also be set on the rotating member 32, and the second slide bar can also be set on the lever 4.

[0027] The pull rod 3 passes through a vertically arranged guide channel 12, and the power cylinder 1 can drive the lever 4 to rotate around the support shaft 5, thereby driving the pull rod 3 to move downward and upward along the guide channel 12.

[0028] A groove 13 is provided on the side wall of the rod 31. The groove 13 includes a first vertical section 131 at the top, an inclined section 132 connected to the lower end of the first vertical section 131, and a second vertical section 133 connected to the lower end of the inclined section 132. A protrusion 14 that can be inserted into the groove 13 is provided in the guide channel 12. When the rod 31 moves up and down, the protrusion 14 can move relative to the groove 13, making the groove 13 a partially inclined structure. Therefore, when the protrusion 14 slides along the inclined section 132, it can drive the rod 31 to rotate.

[0029] The clamping mechanism further includes a clamp assembly comprising a first clamp 15 and a second clamp 16. The pull rod 3 passes through the first clamp 15 and the second clamp 16, and a pressure block 34 is provided at the end of the pull rod 3. In this embodiment, the pressure block 34 is a T-shaped pressure block, the first clamp 15 is a movable part, and the second clamp 16 is a fixed part. The pressure block 34 can press against the end of the first clamp 15 away from the second clamp 16, and the guide channel 12 is provided on the second clamp 16.

[0030] The support shaft 5 can be positioned on the side of the lever 4 closest to the pull rod 3, or on the side of the lever 4 closest to the power cylinder 1. When the pull rod 3 needs to provide a larger pulling force, the support shaft 5 is positioned on the side of the lever 4 closest to the pull rod 3, amplifying the power of the power cylinder 1 through the lever 4. When the pull rod 3 needs to provide a faster response speed, the support shaft 5 is positioned on the side of the lever 4 closest to the power cylinder 1, allowing the telescopic arm of the power cylinder 1 to achieve a larger stroke on the pull rod 3 side when the telescopic arm provides a smaller stroke. The clamping mechanism of this invention can change the clamping force or response speed through the lever 4 mechanism, and its structure is relatively simple, requiring no additional customization of the power cylinder 1, shortening the production cycle, saving costs, and ensuring the operational stability of the system.

[0031] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A clamping mechanism, characterized by: The device comprises a power cylinder, a mounting base, a pull rod and a lever, the lever is installed on the mounting base through a support shaft, two ends of the lever are connected to the power cylinder and the pull rod through a first waist slot sliding rod mechanism and a second waist slot sliding rod mechanism respectively, the pull rod passes through a guide channel, the power cylinder can drive the lever to rotate around the support shaft so as to drive the pull rod to move along the guide channel, the support shaft is arranged on the side of the lever close to the pull rod or on the side of the lever close to the power cylinder.

2. The clamping mechanism of claim 1, wherein: The pull rod comprises a rod body and a rotating piece arranged on the rod body, the second waist slot sliding rod mechanism comprises a second waist slot arranged on the end of the lever and a second sliding rod arranged on the rotating piece, the second sliding rod is inserted into the second waist slot.

3. The clamping mechanism of claim 2, wherein: The end of the lever is provided with a U-shaped slot, the rotating piece is located in the U-shaped slot, the second waist slot is arranged on the two side walls of the U-shaped slot, the second sliding rod is two, and the two second sliding rods are coaxially arranged on the two sides of the rotating piece.

4. The clamping mechanism of claim 3, wherein: One end of the second waist slot extends to the end of the side wall of the U-shaped slot, so as to form an open structure.

5. The clamping mechanism of claim 2, wherein: A sliding groove is arranged on the side wall of the rod body, the sliding groove is at least partially inclined, and a protrusion capable of being inserted into the sliding groove is arranged in the guide channel.

6. A clamping mechanism according to any one of claims 1 to 5, wherein: The cylinder body of the power cylinder is fixed to the mounting base through a connecting rod.

7. A clamping mechanism according to any one of claims 1 to 5, wherein: The extension direction of the telescopic arm of the power cylinder is parallel to the axial direction of the pull rod.

8. A clamping mechanism according to any one of claims 1 to 5, wherein: The clamping mechanism further comprises a clamp assembly, the clamp assembly comprises a first clamp and a second clamp, the pull rod passes through the first clamp and the second clamp, and a pressing block is arranged at the end of the pull rod.

9. The clamping mechanism of claim 8, wherein: The first clamp is a movable piece, the second clamp is a fixed piece, and the pressing block can be pressed on the end of the first clamp away from the second clamp.

10. The clamping mechanism of claim 9, wherein: The guide channel is arranged on the second clamp.

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