Non-self-locking push-pull type clamping mechanism

Abstract

The utility model discloses a non-self-locking push-pull type clamping mechanism, which relates to the technical field of mechanical equipment in the automobile industry, comprises a fixed plate, and is characterized in that one end of the fixed plate is fixedly connected with a driving cylinder, the telescopic end of the driving cylinder is fixedly connected with a lifting block, and the lifting block is fixedly connected with a push rod. A movable rod is clamped to the inner side of the lifting block, a first fixing shaft is fixedly connected to one end of the movable rod, and a connecting rod is hinged to the outer surface of the first fixing shaft. According to the non-self-locking push-pull type clamping mechanism, the sliding rod, the sliding sleeve, the limiting rod, the spring, the clamping block and the fastening sleeve are used in cooperation, the position of the limiting rod can be rapidly adjusted through sliding fit of the sliding rod and the sliding sleeve in combination with the elastic reset function of the spring, the limiting rod can be pulled and drawn by loosening the fastening sleeve, and the clamping block can be conveniently clamped. And the clamping blocks matched with the workpieces in different shapes are directly replaced, so that the clamping adaptability to the special-shaped workpieces is remarkably improved, and the parts in different shapes are clamped.

Description

Technical Field

[0001] This utility model relates to the field of mechanical equipment technology in the automotive industry, specifically a non-self-locking push-pull clamping mechanism. Background Technology

[0002] The non-self-locking push-pull clamping mechanism is a common planar four-bar linkage. It consists of a frame, two connecting rods, and a float. In this mechanism, the frame is relatively fixed, while the two connecting rods connected to the frame are linkages, meaning they can only reciprocate within a certain angle range.

[0003] Existing clamping frames require changing clamping blocks according to the shape of the workpiece when clamping it. When clamping irregular workpieces, the clamping is prone to instability, making it difficult to clamp workpieces of different shapes. Irregularly shaped workpieces are prone to loosening or shifting when clamped, resulting in a decrease in machining accuracy and requiring frequent changes of fixtures or adjustments to the equipment. To address these issues, we provide a non-self-locking push-pull clamping mechanism. Summary of the Invention

[0004] The purpose of this invention is to provide a non-self-locking push-pull clamping mechanism to solve the problems raised in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a non-self-locking push-pull clamping mechanism, comprising a fixed plate, a drive cylinder fixedly connected to one end of the fixed plate, a lifting block fixedly connected to the telescopic end of the drive cylinder, a movable rod snapped into the inner side of the lifting block, a first fixed shaft fixedly connected to one end of the movable rod, a connecting rod hinged to the outer surface of the first fixed shaft, a second fixed shaft fixedly connected to the upper end of the connecting rod, a clamping column hinged to the outer surface of the second fixed shaft, and a quick-release mechanism provided on one side of the clamping column;

[0006] The quick-release mechanism includes a slide rod fixedly connected to the inner side of the clamping column, a slide sleeve slidably connected to the outer surface of the slide rod, a limit rod fixedly connected to one side of the slide sleeve, a clamping block being engaged with the outer surface of the limit rod, and a workpiece being engaged with the inner side of the clamping block.

[0007] Preferably, a spring is sleeved on the outer surface of the slide rod, and one end of the spring is fixedly connected to the inner side of the clamping column. The spring can support the slide sleeve, and when the fixation is released, the spring can push the limiting rod to release the fixation.

[0008] Preferably, the other end of the spring is fixedly connected to one side of the sliding sleeve, the outer surface of the limiting rod is slidably connected to the inner wall of the clamping column, the limiting rod is installed inside the clamping column, and the clamping block can be fixed by the limiting rod, which makes it convenient to replace the clamping block according to the workpiece.

[0009] Preferably, the limiting rod passes through the clamping column, and one end of the limiting rod is threadedly connected to a fastening sleeve. The limiting rod can be fixed by tightening the fastening sleeve, which facilitates the fixing of the clamping block inserted into the clamping column.

[0010] Preferably, a first rotating shaft is fixedly connected to one side of the fixed plate. The outer surface of the first rotating shaft is rotatably connected to the inner wall of the movable rod. The movable rod can be fixed to the fixed plate through the first rotating shaft, which facilitates the rotation of the movable rod.

[0011] Preferably, a second rotating shaft is fixedly connected to one side of the fixing plate. The outer surface of the second rotating shaft is rotatably connected to the inner wall of the clamping column. The clamping column can be mounted on the fixing plate through the second rotating shaft, and it plays a fixing role when the clamping column rotates.

[0012] Preferably, a fixing block is fixedly connected to the other side of the fixing plate, and a guide rod is slidably connected to the inner wall of the fixing block. The upper end of the guide rod is fixedly connected to one side of the lifting block. When the lifting block slides up and down, the guide rod can guide the lifting block and play a guiding role.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. The non-self-locking push-pull clamping mechanism of this application uses a sliding rod, a sliding sleeve, a limiting rod, a spring, a clamping block, and a fastening sleeve in combination. Through the sliding engagement of the sliding rod and the sliding sleeve combined with the elastic reset function of the spring, the position of the limiting rod can be quickly adjusted. The limiting rod can be pulled out by loosening the fastening sleeve, and the clamping block adapted to different shapes of workpieces can be directly replaced, which significantly improves the clamping adaptability of irregular workpieces and realizes the clamping of parts of different shapes.

[0015] 2. The non-self-locking push-pull clamping mechanism of this application uses a fixed plate, a drive cylinder, a lifting block, a movable rod, a connecting rod, a clamping column, a guide rod, and a fixed block in cooperation. The fixed plate serves as a rigid reference and forms a dual-axis fixed structure through a first rotation axis and a second rotation axis, providing a stable swing fulcrum for the movable rod and the clamping column, thus avoiding the loosening problem of the floating connecting parts. The guide rod is linearly limited to the fixed block, and the guide rod is rigidly connected to the lifting block. During the push-pull process of the drive cylinder, the guide rod slides along the inner wall of the fixed block, forcibly constraining the vertical movement trajectory of the lifting block, thus completely eliminating the excessive wear problem caused by the lack of angular limit in the floating mechanism in the prior art. Attached Figure Description

[0016] Figure 1 This is a frontal three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a schematic diagram of the overall three-dimensional structure of the present invention from the rear view.

[0018] Figure 3 This is a three-dimensional cross-sectional view of the clamping column of this utility model;

[0019] Figure 4 This is an exploded three-dimensional structural diagram of the quick-release mechanism of this utility model;

[0020] The following are labeled in the diagram: 1. Fixed plate; 2. Drive cylinder; 3. Lifting block; 4. Movable rod; 5. Connecting rod; 6. Clamping column;

[0021] 7. Quick-release mechanism; 701. Slide rod; 702. Slide sleeve; 703. Limiting rod; 704. Spring; 705. Clamping block; 706. Fastening sleeve;

[0022] 8. Workpiece; 9. First rotating axis; 10. First fixed axis; 11. Second fixed axis; 12. Second rotating axis; 13. Guide rod; 14. Fixing block. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] like Figure 2 As shown, this utility model provides a technical solution for a non-self-locking push-pull clamping mechanism, including a fixed plate 1, a fixed block 14 fixedly connected to the other side of the fixed plate 1, a guide rod 13 slidably connected to the inner wall of the fixed block 14, the upper end of the guide rod 13 being fixedly connected to one side of the lifting block 3, the fixed block 14 being installed on the fixed plate 1, and when the lifting block 3 moves up and down, the fixed block 14 can guide the lifting block 3 to prevent the lifting block 3 from tilting during the movement, and the guide rod 13 slides inside the fixed block 14 to play a guiding role.

[0025] A second rotating shaft 12 is fixedly connected to one side of the fixed plate 1. The outer surface of the second rotating shaft 12 is rotatably connected to the inner wall of the clamping column 6. The second rotating shaft 12 is mounted on the fixed plate 1. The clamping column 6 can be fixed by the second rotating shaft 12 to prevent the clamping column 6 from falling off during rotation, thus playing a fixing role. A first rotating shaft 9 is fixedly connected to one side of the fixed plate 1. The outer surface of the first rotating shaft 9 is rotatably connected to the inner wall of the movable rod 4. The first rotating shaft 9 is mounted on the fixed plate 1. The movable rod 4 can be fixed by the first rotating shaft 9, thus playing a fixing role when the movable rod 4 is adjusted.

[0026] like Figure 1 As shown, a drive cylinder 2 is fixedly connected to one end of the fixed plate 1. A lifting block 3 is fixedly connected to the telescopic end of the drive cylinder 2. A movable rod 4 is snapped into the inner side of the lifting block 3. A first fixed shaft 10 is fixedly connected to one end of the movable rod 4. A connecting rod 5 is hinged to the outer surface of the first fixed shaft 10. A second fixed shaft 11 is fixedly connected to the upper end of the connecting rod 5. A clamping column 6 is hinged to the outer surface of the second fixed shaft 11. A quick-release mechanism 7 is provided on one side of the clamping column 6. The lifting block 3 can be pushed up and down by the drive cylinder 2, and the movable rod 4 can be moved by the lifting block 3. The connecting rod 5 and the clamping column 6 can be driven by the movable rod 4 to clamp the workpiece 8. The clamping block 705 can be replaced according to the shape of the workpiece 8 by the quick-release mechanism 7.

[0027] like Figure 3 and Figure 4 As shown, the quick-release mechanism 7 includes a slide rod 701 fixedly connected to the inner side of the clamping post 6. A spring 704 is sleeved on the outer surface of the slide rod 701. The other end of the spring 704 is fixedly connected to one side of the slide sleeve 702. The outer surface of the limiting rod 703 is slidably connected to the inner wall of the clamping post 6. The spring 704 is installed between the slide sleeve 702 and the clamping post 6. When the clamping block 705 is released, the spring 704 can push the slide sleeve 702 to slide, thereby releasing the clamping block 705. One end of the spring 704 is fixedly connected to the inner side of the clamping post 6. The spring 704 is installed on the slide rod 701. The spring 704 can guide the slide sleeve 702 and fix the limiting rod 703, thereby fixing the clamping block 705.

[0028] A sliding sleeve 702 is slidably connected to the outer surface of the sliding rod 701. A limiting rod 703 is fixedly connected to one side of the sliding sleeve 702. The limiting rod 703 passes through the clamping column 6. A fastening sleeve 706 is threaded to one end of the limiting rod 703. The fastening sleeve 706 is installed on the limiting rod 703. By tightening the fastening sleeve 706, the limiting rod 703 can be tightened, thereby fixing the clamping block 705. When it is necessary to replace the clamping block 705, the fastening sleeve 706 can be tightened to release the fixation of the limiting rod 703, thereby allowing the replacement of different clamping blocks 705. The clamping block 705 is snapped onto the outer surface of the limiting rod 703, and the workpiece 8 is snapped onto the inner side of the clamping block 705.

[0029] The drive cylinder 2 in this application is a common electrical device in the prior art, and its model or specific structure will not be described in detail in this application.

[0030] Working principle: The drive cylinder 2 serves as the power source, pushing the lifting block 3 vertically through its telescopic end. The lifting block 3, through the sliding engagement of the guide rod 13 and the fixed block 14, ensures that the movement trajectory is strictly vertical, avoiding the disorderly swaying of traditional floating mechanisms. The lifting block 3 drives the movable rod 4 to rotate around the first rotating axis 9. The movable rod 4 drives the connecting rod 5 to swing through the first fixed axis 10. The second fixed axis 11 at the end of the connecting rod 5 transmits power to the clamping column 6, causing it to rotate around the second rotating axis 12. The parallel four-bar linkage composed of the fixed plate 1, movable rod 4, connecting rod 5, and clamping column 6 ensures the symmetry and synchronization of the clamping actions on both sides, preventing the workpiece 8 from shifting. When the drive cylinder 2 retracts, the lifting block 3 moves downward, forcing the clamping column 6 to rotate and close towards the workpiece 8 through the four-bar linkage. When the drive cylinder 2 extends, the lifting block 3 moves upward, and the four-bar linkage moves in the opposite direction, causing the clamping column 6 to rotate outward and open, loosening the fastening sleeve 7. 06. Under the action of spring 704, the limiting rod 703 automatically exits the limiting hole of the clamping column 6, pulls out the original clamping block 705, and replaces it with a customized clamping block 705 adapted to the irregular workpiece 8. The limiting rod 703 is pushed in to pass through the new clamping block 705, and the fastening sleeve 706 is tightened to complete the fixation. The precise sliding cooperation between the sliding rod 701 and the sliding sleeve 702, combined with the elastic reset of the spring 704, allows for quick fixture replacement. The clamping block 705 adopts a modular design and supports various interfaces such as arc surface, V-groove, and irregular contour. The fixing plate 1 forms a double-support fixed structure through the first rotating shaft 9 and the second rotating shaft 12. Compared with the traditional single-axis floating design, the linear guiding system of the guide rod 13 and the fixing block 14 limits the swing angle of the lifting block 3. Compared with the unconstrained floating mechanism, the life of key components is extended. The parallel four-bar mechanism principle is adopted, and the clamping force changes linearly with the cylinder thrust to achieve clamping of parts of different shapes.

[0031] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A non-self-locking push-pull clamping mechanism, comprising a fixed plate (1), characterized in that: One end of the fixed plate (1) is fixedly connected to a drive cylinder (2), and the telescopic end of the drive cylinder (2) is fixedly connected to a lifting block (3). The inner side of the lifting block (3) is clamped with a movable rod (4). One end of the movable rod (4) is fixedly connected to a first fixed shaft (10). The outer surface of the first fixed shaft (10) is hinged with a connecting rod (5). The upper end of the connecting rod (5) is fixedly connected to a second fixed shaft (11). The outer surface of the second fixed shaft (11) is hinged with a clamping column (6). A quick-release mechanism (7) is provided on one side of the clamping column (6). The quick-release mechanism (7) includes a slide rod (701) fixedly connected to the inner side of the clamping column (6), a slide sleeve (702) slidably connected to the outer surface of the slide rod (701), a limit rod (703) fixedly connected to one side of the slide sleeve (702), a clamping block (705) snapped onto the outer surface of the limit rod (703), and a workpiece (8) snapped onto the inner side of the clamping block (705).

2. The non-self-locking push-pull clamping mechanism according to claim 1, characterized in that: A spring (704) is sleeved on the outer surface of the slide bar (701), and one end of the spring (704) is fixedly connected to the inner side of the clamping post (6).

3. The non-self-locking push-pull clamping mechanism according to claim 2, characterized in that: The other end of the spring (704) is fixedly connected to one side of the sliding sleeve (702), and the outer surface of the limiting rod (703) is slidably connected to the inner wall of the clamping column (6).

4. The non-self-locking push-pull clamping mechanism according to claim 3, characterized in that: The limiting rod (703) passes through the clamping column (6), and one end of the limiting rod (703) is threadedly connected to a fastening sleeve (706).

5. A non-self-locking push-pull clamping mechanism according to claim 1, characterized in that: A first rotating shaft (9) is fixedly connected to one side of the fixed plate (1), and the outer surface of the first rotating shaft (9) is rotatably connected to the inner wall of the movable rod (4).

6. The non-self-locking push-pull clamping mechanism according to claim 1, characterized in that: A second rotating shaft (12) is fixedly connected to one side of the fixed plate (1), and the outer surface of the second rotating shaft (12) is rotatably connected to the inner wall of the clamping column (6).

7. The non-self-locking push-pull clamping mechanism according to claim 1, characterized in that: A fixing block (14) is fixedly connected to the other side of the fixing plate (1), and a guide rod (13) is slidably connected to the inner wall of the fixing block (14). The upper end of the guide rod (13) is fixedly connected to one side of the lifting block (3).

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