Quick clamping fixture with self-locking function

Abstract

The utility model relates to the technical field of clamp, disclose a quick clamping fixture with self -locking function, including base, the top of base is provided with clamping mechanism, the top of base is provided with self -locking mechanism, the clamping mechanism includes fixed block a, the inside sliding connection of fixed block a has push rod, the top left side fixed connection of push rod has fixed block b, the outside both sides fixed connection of fixed block a has linkage swing arm rod, the inner wall both sides fixed connection of linkage swing arm rod has hinged pin axle ring, the top of hinged pin axle ring is provided with adjusting assembly. In the utility model, through manual wrenching operation handle can realize the clamping and loosening of work piece, and the action is simple and direct, can let the operator fast on hand, effectively reduced the operation threshold, promoted the convenience of operation, ensured that work piece was not prone to displacement in the processing or processing process, and the precision and stability of operation were guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of clamping technology, and in particular to a quick clamping clamp with a self-locking function. Background Technology

[0002] When using self-locking quick-clamping fixtures, a type of quick-clamping fixture with a self-locking function is often used. This device is capable of quickly loading and unloading workpieces by automatically locking itself in a clamped state. Through mechanical structure design, it achieves rapid clamping and automatically maintains the clamping force without continuous manual operation or additional auxiliary fixation. On the one hand, it greatly improves clamping efficiency, saves operation time, and speeds up the production pace. On the other hand, it enhances the stability and reliability of clamping, effectively preventing workpiece loosening due to accidental vibration, external forces, and other factors, ensuring machining accuracy, and reducing scrap rate. It is especially suitable for machining scenarios with frequent workpiece changes and high requirements for production efficiency and quality.

[0003] A quick-clamping fixture with a self-locking function first places the workpiece in the fixture, then operates the fixture's drive mechanism to move the jaws quickly and clamp the workpiece. During the clamping process, the self-locking mechanism is triggered, achieving automatic locking through a special mechanical structure or device. This ensures that the fixture can firmly fix the workpiece during subsequent processing, preventing the workpiece from loosening due to external forces or vibrations. When it is necessary to release the workpiece, the corresponding unlocking device is operated to release the self-locking state, and then the jaws are released through the drive mechanism, thus completing one clamping process.

[0004] In existing technologies, some quick-clamping fixtures with self-locking functions rely primarily on external force to maintain their locking state. For example, lever-type and eccentric wheel-type fixtures, after initial locking through manual operation, lack an effective mechanical self-locking mechanism. When subjected to workpiece processing vibration, external impact, or wear caused by long-term use, they are prone to loosening, which not only affects the workpiece positioning accuracy but may even lead to the safety hazard of workpiece falling off. While pneumatic and hydraulic driven fixtures can maintain locking through continuous fluid pressure, they require a stable air or hydraulic source. Once the power is interrupted, such as by pipeline leakage or equipment failure, the locking force will disappear instantly, making passive self-locking impossible. Therefore, a quick-clamping fixture with self-locking function is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above deficiencies, this utility model provides a quick clamping fixture with a self-locking function, aiming to improve the problem that some existing devices cannot self-lock the quick clamping fixture.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A quick clamping fixture with a self-locking function includes a base, a clamping mechanism on the top of the base, and a self-locking mechanism on the top of the base.

[0008] The clamping mechanism includes a fixed block a, a push rod slidably connected inside the fixed block a, a fixed block b fixedly connected to the top left side of the push rod, a linkage swing arm fixedly connected to the left and right sides of the outside of the fixed block a, a hinge pin ring fixedly connected to the left and right sides of the inner wall of the linkage swing arm, an adjustment component provided at the top of the hinge pin ring, limit rods fixedly connected to the left and right sides of the outer wall of the hinge pin ring, the bottom of the fixed block a fixedly connected to the top right side of the base, and the outside of the push rod slidably connected to the inside of the fixed block b.

[0009] As a further description of the above technical solution:

[0010] The self-locking mechanism includes a self-locking base, a slot is provided in the internal space of the self-locking base, a self-locking lever is fixedly connected to the top of the self-locking base, and the outer left side of the self-locking base is fixedly connected to the outer right side of the push rod.

[0011] As a further description of the above technical solution:

[0012] The adjustment assembly includes an operating handle, the bottom of which is fixedly connected to the top of the hinge pin collar, and the left and right sides of the inner wall of the limiting rod are fixedly connected to the left and right sides of the outer wall of the push rod.

[0013] As a further description of the above technical solution:

[0014] A locking link is fixedly connected inside the self-locking lever, and a locking spring is sleeved on the outer bottom side of the locking link. The locking link is slidably connected to the inside of the self-locking base.

[0015] As a further description of the above technical solution:

[0016] A locking top block is fixedly connected to the bottom of the locking link, the outside of the locking top block is slidably connected to the inside of the self-locking base, and the outside of the locking spring is fixedly connected to the inside of the self-locking base.

[0017] As a further description of the above technical solution:

[0018] A support plate is fixedly connected to the top right side of the base, and a positioning groove is provided in the internal space of the support plate. The locking top block is fixedly connected to the inside of the positioning groove.

[0019] As a further description of the above technical solution:

[0020] A telescopic rod is fixedly connected to the outer left side of the push rod, and a spring a is sleeved on the outside of the telescopic rod. The outer right side of the spring a is fixedly connected to the outer left side of the push rod.

[0021] As a further description of the above technical solution:

[0022] A fastening block is fixedly connected to the outer left side of the telescopic rod, and a baffle is fixedly connected to the top left side of the base. The outer left side of the fastening block is slidably connected to the outer right side of the baffle.

[0023] This utility model has the following beneficial effects:

[0024] 1. In this utility model, the workpiece can be clamped and released by manually operating the handle. The action is simple and intuitive, allowing operators to quickly get started, effectively lowering the operating threshold and improving the convenience of operation. With the elasticity of spring a, the workpiece can be automatically pushed back when released, without the need to apply too much external force. This not only saves manpower but also makes the reset process smoother and more efficient, reducing the cumbersomeness of the operation. The method of clamping the workpiece by the fastening block and the baffle can form a stable and reliable clamping effect, ensuring that the workpiece is not easily displaced during processing or handling, thus ensuring the accuracy and stability of the operation.

[0025] 2. In this utility model, the locking and unlocking states can be flexibly switched by operating the self-locking lever. The operation is convenient and responsive, allowing operators to adjust according to work requirements at any time, thus improving operational flexibility. The locking spring provides continuous preload in the locked state, ensuring that the locking top block and the positioning groove are in close contact, making the locking state of the clamping mechanism stable and firm. This effectively avoids the push rod from loosening due to accidental collisions, vibrations, or other factors during operation, preventing the workpiece from suddenly falling off, greatly reducing safety hazards, and ensuring the stability and safety of the operation. Attached Figure Description

[0026] Figure 1 This is a three-dimensional schematic diagram of a quick clamping fixture with a self-locking function proposed in this utility model;

[0027] Figure 2 This is a schematic diagram of the linkage swing arm of a quick clamping fixture with self-locking function proposed in this utility model.

[0028] Figure 3 This is a schematic diagram of the structure of the fixing block b of a quick clamping fixture with self-locking function proposed in this utility model;

[0029] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0030] Legend:

[0031] 1. Base; 2. Fixing block a; 3. Push rod; 4. Fixing block b; 5. Linkage swing arm rod; 6. Hinge pin collar; 7. Operating handle; 8. Limit rod; 9. Self-locking base; 10. Slot; 11. Self-locking lever; 12. Locking linkage rod; 13. Locking spring; 14. Locking top block; 15. Support plate; 16. Positioning groove; 17. Telescopic rod; 18. Spring a; 19. Fastening round block; 20. Baffle. Detailed Implementation

[0032] 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.

[0033] Reference Figure 1 and Figure 3 The present invention provides an embodiment of a quick clamping fixture with a self-locking function, comprising a base 1, which is used for support and fixation to ensure the overall stability of the fixture. A clamping mechanism is provided on the top of the base 1, and a self-locking mechanism is provided on the top of the base 1.

[0034] The clamping mechanism includes a fixed block a2, which is a sliding support structure for the push rod 3 and also a connecting base for the linkage swing arm 5. The push rod 3 is slidably connected inside the fixed block a2. When an external force is applied to the push rod 3, it can slide in the sliding channel of the fixed block a2 and the fixed block b4. The sliding of the push rod 3 drives the fastening block 19 to move together, thereby realizing the clamping or releasing action of the workpiece. The top left side of the push rod 3 is fixedly connected to the fixed block b4, which is a sliding support structure for the push rod 3, thereby realizing the clamping of the workpiece.

[0035] The left and right sides of the fixed block a2 are fixedly connected to the linkage swing arm 5, which transmits power and amplifies the force. When the operating handle 7 drives the hinge pin ring 6 to move through the adjustment component, the linkage swing arm 5 will swing accordingly, converting the small force of the operating handle 7 into a larger clamping force, thereby realizing the rapid clamping of the workpiece. The left and right sides of the inner wall of the linkage swing arm 5 are fixedly connected to the hinge pin ring 6. When the operating handle 7 moves up and down, the hinge pin ring 6 will move accordingly, and transmit the motion to the push rod 3 through the linkage swing arm 5, thereby realizing the action of the clamping mechanism.

[0036] The top of the hinge pin ring 6 is equipped with an adjustment component. When the operator manually moves the operating handle 7 up and down, the operating handle 7 will drive the hinge pin ring 6 to move, thereby controlling the clamping and releasing actions of the fixture through the linkage of the swing arm 5 and the push rod 3. The left and right sides of the outer wall of the hinge pin ring 6 are fixedly connected to the limit rods 8 to restrict the movement of the push rod 3, prevent the push rod 3 from being excessively displaced during the sliding process, and ensure that the fixture operates within the normal working range. The bottom of the fixed block a2 is fixedly connected to the top right side of the base 1, and the outside of the push rod 3 is slidably connected to the inside of the fixed block b4.

[0037] The self-locking mechanism includes a self-locking base 9 for realizing the self-locking function. Through the cooperation of the locking link 12 and the locking spring 13, the movement state of the clamping mechanism is locked to prevent accidental loosening. The internal space of the self-locking base 9 is provided with a slot 10, which is used to store the locking top block 14 in the unlocked state. The top of the self-locking base 9 is fixedly connected to a self-locking lever 11. When the operator moves the self-locking lever 11, the locking link 12 drives the locking top block 14 to move up and down, thereby realizing the locking and unlocking of the self-locking mechanism. The outer left side of the self-locking base 9 is fixedly connected to the outer right side of the push rod 3.

[0038] Reference Figure 3 and Figure 4 The adjustment assembly includes an operating handle 7, the bottom of which is fixedly connected to the top of the hinge pin ring 6. The left and right sides of the inner wall of the limiting rod 8 are fixedly connected to the left and right sides of the outer wall of the push rod 3. The self-locking lever 11 is internally fixedly connected to a locking link 12, which transmits the movement of the self-locking lever 11 to the locking top block 14. When the self-locking lever 11 is moved, the locking link 12 pushes the locking top block 14 into the positioning groove 16 to achieve self-locking. Conversely, when the self-locking lever 11 is reset, the locking top block 14 exits from the positioning groove 16 to release the self-locking.

[0039] A locking spring 13 is fitted on the outer bottom side of the locking link 12 to provide preload force, ensuring that the locking top block 14 always remains in contact with the positioning groove 16 to prevent accidental unlocking. The locking link 12 is externally slidably connected to the inside of the self-locking base 9. The bottom of the locking link 12 is fixedly connected to the locking top block 14. When the locking link 12 pushes the locking top block 14 into the positioning groove 16, the locking top block 14 locks the push rod 3, keeping the clamping mechanism locked. When the locking top block 14 exits from the positioning groove 16, the self-locking is released. The locking top block 14 is externally slidably connected to the inside of the self-locking base 9, and the locking spring 13 is externally fixedly connected to the inside of the self-locking base 9.

[0040] Reference Figure 2 and Figure 3A support plate 15 is fixedly connected to the top right side of the base 1, which provides guidance and limiting function for the locking top block 14. It can be accurately locked into the positioning groove 16 to ensure the stability and reliability of the self-locking mechanism. The positioning groove 16 is opened in the internal space area of ​​the support plate 15 to receive the locking top block 14. When the locking top block 14 slides into the positioning groove 16, the self-locking mechanism enters the locked state, and the push rod 3 of the clamping mechanism is fixed and cannot continue to move, thereby realizing the self-locking function.

[0041] The locking top block 14 is externally fixedly connected to the inside of the positioning groove 16. The outer left side of the push rod 3 is fixedly connected to the telescopic rod 17, which is used to provide additional clamping force during the clamping process to ensure the stability of the clamping mechanism. The telescopic rod 17 is sleeved with a spring a18. When the push rod 3 moves to the right, the telescopic rod 17 is compressed and the spring a18 stores elastic potential energy. When the push rod 3 retracts to the left, the spring a18 releases energy and pushes the telescopic rod 17 to reset, ensuring the stability of the clamping mechanism. The outer right side of the spring a18 is fixedly connected to the outer left side of the push rod 3.

[0042] A fastening block 19 is fixedly connected to the outer left side of the telescopic rod 17, which works in conjunction with the baffle 20. When the telescopic rod 17 moves to the left, the fastening block 19 will contact the baffle 20, thereby clamping the workpiece. A baffle 20 is fixedly connected to the top left side of the base 1, which serves as a fixed support surface and clamps the workpiece together with the fastening block 19. The outer left side of the fastening block 19 is slidably connected to the outer right side of the baffle 20.

[0043] Working principle: When the workpiece needs to be clamped, the operator manually pulls the operating handle 7 downwards. The operating handle 7 drives the hinge pin ring 6 to move. The movement of the hinge pin ring 6 causes the linkage swing arm 5 to swing accordingly. The swing of the linkage swing arm 5 causes the push rod 3 to slide within the sliding channel of the fixed block a and the fixed block b. The sliding of the push rod 3 simultaneously drives the limit rod 8 to move, and the sliding of the push rod 3 also drives the fastening block 19 and the telescopic rod 17 to move. At this time, the telescopic rod 17 is compressed, and the spring a sleeved on the outside of the telescopic rod 17 is also compressed. The fastening block 19 gradually moves closer to the baffle 20 until it cooperates with the baffle 20 to clamp the workpiece. When it is necessary to release the workpiece, the operator manually pulls the operating handle 7 upwards. The operating handle 7 drives the hinge pin ring 6 to move in the opposite direction, and the linkage swing arm 5 swings in the opposite direction, thereby driving the push rod 3 to slide in the opposite direction. The limit rod 8 also moves in the opposite direction with the push rod 3. At this time, the compressed spring a The energy is released, pushing the telescopic rod 17 to reset, and the fastening block 19 moves with the telescopic rod 17 in a direction away from the baffle 20, thereby releasing the workpiece.

[0044] In the initial state, the self-locking mechanism is in the unlocked state, and the locking top block 14 is stored in the slot 10 inside the self-locking base 9. When the operator moves the self-locking lever 11, the self-locking lever 11 drives the locking top block 14 to move downward through the locking link 12. The locking top block 14 slides into the positioning slot 16 inside the support plate 15. At this time, the locking spring 13 is compressed, providing a preload to ensure that the locking top block 14 remains in contact with the positioning slot 16, thereby locking the push rod 3 and putting the clamping mechanism into the locked state to prevent accidental loosening. When it is necessary to unlock, the operator resets the self-locking lever 11, and the elastic force of the locking spring 13 pushes the locking link 12 to move upward, causing the locking top block 14 to exit from the positioning slot 16 and return to the slot 10. The self-locking is released, and the push rod 3 returns to the movable state.

[0045] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A quick-clamping fixture with self-locking function, comprising a base (1), characterized in that: The top of the base (1) is provided with a clamping mechanism and a self-locking mechanism. The clamping mechanism includes a fixed block a (2), a push rod (3) is slidably connected inside the fixed block a (2), a fixed block b (4) is fixedly connected to the top left side of the push rod (3), a linkage swing arm rod (5) is fixedly connected to the left and right sides of the outside of the fixed block a (2), a hinge pin ring (6) is fixedly connected to the left and right sides of the inner wall of the linkage swing arm rod (5), an adjustment component is provided on the top of the hinge pin ring (6), a limit rod (8) is fixedly connected to the left and right sides of the outer wall of the hinge pin ring (6), the bottom of the fixed block a (2) is fixedly connected to the top right side of the base (1), and the outside of the push rod (3) is slidably connected to the inside of the fixed block b (4).

2. The quick-clamping fixture with self-locking function according to claim 1, characterized in that: The self-locking mechanism includes a self-locking base (9), a slot (10) is provided in the internal space of the self-locking base (9), a self-locking lever (11) is fixedly connected to the top of the self-locking base (9), and the outer left side of the self-locking base (9) is fixedly connected to the outer right side of the push rod (3).

3. A quick-clamping fixture with self-locking function according to claim 1, characterized in that: The adjustment assembly includes an operating handle (7), the bottom of which is fixedly connected to the top of the hinge pin collar (6), and the left and right sides of the inner wall of the limiting rod (8) are fixedly connected to the left and right sides of the outer wall of the push rod (3).

4. A quick-clamping fixture with self-locking function according to claim 2, characterized in that: The locking lever (11) is fixedly connected to a locking link (12), and a locking spring (13) is sleeved on the bottom side of the locking link (12). The locking link (12) is slidably connected to the inside of the self-locking base (9).

5. A quick-clamping fixture with self-locking function according to claim 4, characterized in that: The bottom of the locking link (12) is fixedly connected to a locking top block (14), the outside of the locking top block (14) is slidably connected to the inside of the self-locking base (9), and the outside of the locking spring (13) is fixedly connected to the inside of the self-locking base (9).

6. A quick-clamping fixture with self-locking function according to claim 5, characterized in that: A support plate (15) is fixedly connected to the top right side of the base (1). A positioning groove (16) is provided in the internal space area of ​​the support plate (15). The locking top block (14) is fixedly connected to the inside of the positioning groove (16).

7. A quick-clamping fixture with self-locking function according to claim 1, characterized in that: A telescopic rod (17) is fixedly connected to the outer left side of the push rod (3), and a spring a (18) is sleeved on the outside of the telescopic rod (17). The outer right side of the spring a (18) is fixedly connected to the outer left side of the push rod (3).

8. A quick-clamping fixture with self-locking function according to claim 7, characterized in that: A fastening block (19) is fixedly connected to the outer left side of the telescopic rod (17), and a baffle (20) is fixedly connected to the top left side of the base (1). The outer left side of the fastening block (19) is slidably connected to the outer right side of the baffle (20).

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