A modular split hydraulic clamp

Abstract

The utility model relates to a combined split type hydraulic clamp, including punch die, still including punch die lower end face fixed mounting block, the hydraulic cylinder of mounting block installation, the output end of hydraulic cylinder is connected with the connecting foot stand, is connected with self -locking subassembly on the connecting foot stand, the lower end of self -locking subassembly is installed with TX clamp, the lower end surface of punch die is set up with two T type grooves, and hydraulic cylinder sets up two, corresponds one T type groove respectively, and self -locking subassembly sets up inside T type groove, and self -locking subassembly is used for locking the position of TX clamp, the novel clamp is through the bevel drive and spring automatic reset and realizes mechanical self -locking, and the power is only provided when advancing and withdrawing, and the lock is unlocked when the push block retreats, and the spring makes the locking structure automatic reset after advancing to the position, realizes still can keep the locking state when power failure, does not need additional control signal, safe and reliable, energy -conserving and efficient.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic clamping technology, specifically a combined split-type hydraulic clamp. Background Technology

[0002] In the industrial manufacturing sector, mold clamping devices are widely used in stamping, injection molding, die casting, and other production processes to fix molds or workpieces, ensuring processing accuracy and operational safety. Traditional clamps mostly use bolt fastening, which is cumbersome to operate and has a long mold change time, making it difficult to meet the needs of efficient and automated production. With the development of hydraulic technology, hydraulic clamps have been widely used due to their large clamping force, fast response speed, and ease of automation control. However, conventional hydraulic clamps rely on continuous pressure to maintain the locking state, which has problems such as high energy consumption, complex systems, and easy loosening when power is off.

[0003] Common hydraulic clamps typically rely on continuous hydraulic pressure to maintain the locking state after clamping a workpiece or mold. The clamping mechanism can only work effectively if the oil pressure is stable. Once the hydraulic pump stops working or the system loses power, the oil pressure drops, the clamping force weakens or even disappears, causing the clamp to loosen and the workpiece to shift, posing a significant safety risk. This design requires the hydraulic station to run for a long time, which not only consumes a lot of energy but also easily causes the oil temperature to rise, accelerates the aging of seals, and increases maintenance costs. At the same time, it has extremely high requirements for the sealing and stability of the hydraulic system. Any leakage or pressure fluctuation may affect the locking effect. Therefore, it is often necessary to equip auxiliary components such as pressure holding circuits, accumulators, or solenoid valves to maintain the pressure, making the overall structure complex, increasing costs, and relatively lower in safety and reliability. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a combined split-type hydraulic clamp. This clamp adopts inclined plane drive and spring return self-locking. Hydraulic power is only supplied when the action is performed. The push block moves backward to unlock, and moves forward to automatically return the spring to lock. It is self-holding when power is cut off, requiring no additional control. It is safe, stable and energy-saving, solving the problems of common hydraulic clamps that require continuous pressure to maintain clamping, are prone to loosening when power is cut off, rely on auxiliary components, have complex structures, and lead to increased maintenance costs.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a combined split-type hydraulic clamp, including a punch mold; and a mounting block fixed to the lower end face of the punch mold, a hydraulic cylinder mounted on the mounting block, the output end of the hydraulic cylinder being connected to a connecting foot, and a self-locking component being connected to the connecting foot. The lower end of the self-locking assembly is equipped with a TX clamp. The lower end face of the punch die has two T-slots. There are two hydraulic cylinders, each corresponding to one T-slot. The self-locking assembly is located inside the T-slot and is used to lock the position of the TX clamp.

[0006] Furthermore, the self-locking assembly includes a sliding block slidably connected inside the T-slot, four springs connected to the inner wall of the sliding block, a movable plate connected to the other end of two springs, a connecting block connected to the outer side of the movable plate, a connecting plate fixed to the outer side of the connecting block, and a locking plate fixed to the surface of the connecting plate. The two springs are a pair, and each pair of springs is connected to a movable plate. The springs allow the movable plate to have floating space.

[0007] Furthermore, the self-locking assembly also includes a push block connected to the connecting foot and a ball bearing movably mounted on the connecting plate. The push block is located between two movable plates and can lock the movable plates in the middle. The movable plates have no floating space. When the push block moves, the movable plates will tilt accordingly. The ball bearing reduces the friction when the sliding block moves.

[0008] Furthermore, the contact surfaces of the movable plate and the push block are both inclined, and the hydraulic cylinder is used to push the push block to move within the sliding block.

[0009] Furthermore, the surface of the locking plate is provided with a locking groove, which is a beveled angle friction locking mechanism. The locking part of the T-slot is provided with an elastic snap-fit ​​component, and the locking groove is used to engage the elastic snap-fit ​​component.

[0010] Furthermore, the pusher moves along the T-slot direction under the drive of the hydraulic cylinder, and its two sides are provided with inclined guide surfaces that slide in contact with the corresponding inclined mating surfaces on the movable plate. When the pusher moves backward, its inclined surface pushes the two movable plates to expand outward synchronously, causing the locking plate to tilt. The tilt angle of the locking groove changes, reducing the frictional locking force between it and the elastic locking element, thereby causing the elastic locking element to disengage from the locking groove and release the locking state.

[0011] Furthermore, as the pusher moves forward under the action of the hydraulic cylinder, its inclined surface continues to push the movable plate to maintain the outward expansion state until the sliding block drives the TX clamp to fully enter the predetermined position of the T-slot; The hydraulic cylinder continues to push the pusher forward, causing it to pass over the inclined section of the movable plate or enter the release area. Under the reset action of the spring, the movable plate retracts inward, causing the locking plate to return to its original posture. The locking groove re-forms an effective locking slope. Under the continuous pre-pressure of the spring, the locking groove and the elastic snap-fit ​​device set in the T-slot achieve tight docking and locking, completing the positioning and self-locking of the fixture.

[0012] Compared with the prior art, the technical solution of this application has the following beneficial effects: 1. The inclined plane drive and elastic reset mechanical self-locking mechanism are adopted to achieve power-off self-holding. The hydraulic cylinder only provides power during the clamping and unlocking stages. When the push block is pushed forward to the predetermined position, it automatically disengages from the squeezing of the movable plate. The movable plate retracts under the action of the spring, which drives the locking plate to return to its original posture. At this time, the locking groove and the elastic snap-fit ​​in the T-slot form an inclined plane friction self-locking structure. Locking is achieved by relying on the static friction between materials and the pre-pressure. The current position can be locked after applying a certain force. There is no need to continuously supply power to maintain the state, which improves the safety and stability of operation and reduces energy consumption. 2. When the push block moves backward, it pushes the movable plate outward, causing the locking plate to tilt, changing the angle of the locking groove, reducing the friction between the locking plate and the elastic locking element, thus achieving active unlocking. After the push block moves forward to its final position, it releases the pressure, and the locking structure automatically returns to its original high friction angle state, forming a passive lock. The entire process is completed automatically by the mechanical structure without the need for additional control signals or energy input. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a partial three-dimensional structural diagram of the present invention; Figure 3 This is a three-dimensional structural diagram of the location of the connecting foot of this utility model; Figure 4 This is a three-dimensional structural diagram of the location of the TX clamp of this utility model; Figure 5 This is a three-dimensional structural diagram of the location of the self-locking component of this utility model.

[0014] In the diagram: 1. Punch press die; 2. T-slot; 3. Mounting block; 4. Hydraulic cylinder; 5. Sliding block; 6. TX clamp; 7. Connecting foot; 8. Spring; 9. Movable plate; 10. Connecting block; 11. Connecting plate; 12. Locking plate; 13. Locking groove; 14. Ball bearing; 15. Push block. Detailed Implementation

[0015] 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.

[0016] Please see Figure 1The combined split hydraulic clamp in this embodiment includes a punch mold 1; it also includes a mounting block 3 fixed to the lower end face of the punch mold 1, a hydraulic cylinder 4 mounted on the mounting block 3, the output end of the hydraulic cylinder 4 is connected to a connecting foot 7, and a self-locking component is connected to the connecting foot 7.

[0017] In this embodiment, the clamp adopts a mechanical self-locking structure with inclined plane drive and spring 8 reset. The hydraulic cylinder 4 is powered only during pushing and unlocking. When the push block 15 moves backward, it pushes the movable plate 9 to expand outward, changing the locking angle to achieve active unlocking. After moving forward to the position, it disengages from the squeeze. The spring 8 resets, causing the locking structure to automatically return to a high friction angle state, forming a friction self-lock with the elastic snap-fit, achieving self-holding when power is cut off. The entire process requires no additional control signal or continuous power supply, making it safe, stable, and energy-saving.

[0018] Please see Figures 1-5 In this embodiment, in order to achieve self-locking of the clamp by the inclined push block 15 and the spring 8, the hydraulic system only works when moving, and is maintained by the structure itself after locking, without the need for continuous oil and electricity supply, which is both safe and energy-saving. In this embodiment, the lower end of the self-locking component is equipped with a TX clamp 6, and the lower end face of the punch die 1 is provided with two T-slots 2. Two hydraulic cylinders 4 are provided, each corresponding to one T-slot 2. The self-locking component is located inside the T-slot 2 and is used to lock the position of the TX clamp 6.

[0019] In this embodiment, to achieve self-locking of the clamp via the inclined push block 15 and spring 8, the hydraulic system only operates during movement. After locking, it is held in place by the structure itself, eliminating the need for continuous oil and electricity supply. This design is both safe and energy-saving. In this embodiment, the TX clamp 6 is installed at the lower end of the self-locking assembly to perform clamping actions. The lower end face of the punch die 1 has two T-slots 2, which serve as tracks for clamp sliding and locking. There are two hydraulic cylinders 4, each corresponding to one T-slot 2, providing pushing and pulling power. The self-locking assembly is installed inside the T-slots 2. Through the cooperation of the push block 15 and spring 8, it achieves the functions of forward locking and backward unlocking. It can maintain its position even without power, improving safety and stability and reducing energy consumption. The entire device has a compact structure and reliable operation, making it suitable for automated stamping scenarios and enabling efficient mold changing and safe fixation.

[0020] It should be noted that the self-locking assembly includes a sliding block 5 slidably connected inside the T-slot 2, four springs 8 connected to the inner wall of the sliding block 5, a movable plate 9 connected to the other end of two springs 8, a connecting block 10 connected to the outer side of the movable plate 9, a connecting plate 11 fixed to the outer side of the connecting block 10, and a locking plate 12 fixed to the surface of the connecting plate 11. The two springs 8 form a pair, and each pair of springs 8 is connected to a movable plate 9. The springs 8 allow the movable plate 9 to have floating space. The self-locking assembly also includes a push block 15 connected to the connecting foot 7 and a ball bearing 14 movably mounted on the connecting plate 11. The push block 15 is located between the two movable plates 9. The push block 15, located in the middle, can lock the movable plate 9. The movable plate 9 has no floating space. When the push block 15 moves, the movable plate 9 will tilt accordingly. The inclined surface and the ball bearing 14 reduce the friction of the sliding block 5 when it moves. The sliding block 5 is used to slide in the T-slot 2 to realize the movement of the clamp. The spring 8 is used to provide elastic restoring force so that the movable plate 9 can automatically return to its original position and at the same time provide pre-pressure for locking. The movable plate 9 is used to transmit the pushing force of the push block 15 and drive the connecting parts to realize the locking or unlocking action. The connecting block 10 is used to connect the movable plate 9 and the connecting plate 11 to transmit motion and force. The connecting plate 11 is used to fix the locking plate 12 and serve as a force transmission structure. The locking plate 12 is used to cooperate with the elastic snap-fit ​​and realize the self-locking function through inclined surface friction. The push block 15 is used to receive the pushing force of the hydraulic cylinder 4 and push the movable plate 9 to expand or release through the inclined surface. The ball bearing 14 is used to reduce the friction between the connecting plate 11 and the T-slot 2 to make the sliding smoother.

[0021] Please see Figures 1-5 In this embodiment, to achieve automatic release of the clamp when the push block 15 is pulled backward, and automatic reset and locking of the locking structure after being pushed forward, the entire process is completed mechanically without the need for electrical control or additional operation. In this embodiment, the push block 15 moves along the direction of the T-slot 2 under the drive of the hydraulic cylinder 4. It has inclined guide surfaces on both sides, which slide in contact with the corresponding inclined mating surfaces on the movable plate 9. When the push block 15 moves backward, its inclined surfaces push the two movable plates 9 to expand outward synchronously, causing the locking plate 12 to tilt. The tilt angle of the locking groove 13 changes, reducing the frictional locking force between it and the elastic snap-fit, thereby causing the elastic snap-fit ​​to disengage. Locking groove 13 is released from the locked state. When push block 15 moves forward under the action of hydraulic cylinder 4, its inclined surface continues to push movable plate 9 to maintain the outward expansion state until sliding block 5 drives TX clamp 6 to fully enter the predetermined position of T-slot 2. Hydraulic cylinder 4 continues to push push block 15 forward, so that it passes over the inclined section of movable plate 9 or enters the release area. Movable plate 9 retracts inward under the reset action of spring 8, driving locking plate 12 to return to its original posture. Locking groove 13 re-forms an effective locking inclined surface. Under the continuous pre-pressure action of spring 8, locking groove 13 and elastic snap-fit ​​parts set in T-slot 2 achieve tight docking and locking, completing the positioning and self-locking of clamp.

[0022] In this embodiment, the push block 15 receives the thrust of the hydraulic cylinder 4 and pushes the movable plate 9 outward to expand or release via the inclined surface, thereby controlling locking and unlocking. The hydraulic cylinder 4 provides the power for the push block 15 to move back and forth, driving the entire self-locking assembly to operate. The inclined guide surface cooperates with the movable plate 9 to convert the linear motion of the push block 15 into the lateral expansion or contraction of the movable plate 9. The movable plate 9 generates outward expansion or retraction under the action of the push block 15, transmitting the locking or unlocking force. The locking plate 12 tilts with the movement of the movable plate 9, changing the angle of the locking groove 13 to achieve friction adjustment. The locking groove 13 is used to form a friction self-locking structure with the elastic snap-fit ​​when locked to prevent the clamp from disengaging. The elastic snap-fit ​​is used to cooperate with the locking groove 13 to provide reverse blocking force in the locked state to enhance safety. The spring 8 is used to push the movable plate 9 to retract after the push block 15 is released, so that the locking structure is automatically reset and passively locked. The sliding block 5 is used to carry the internal parts and realize the sliding of the entire clamp in the T-slot 2. The TX clamp 6 is used to perform the final clamping function to fix the mold or workpiece. The ball 14 is used to reduce the friction between the connecting plate 11 and the T-slot 2 to make the advance and exit smoother.

[0023] It should be noted that the contact surfaces of the movable plate 9 and the push block 15 are both inclined. The hydraulic cylinder 4 is used to push the push block 15 to move within the sliding block 5. The surface of the locking plate 12 is provided with a locking groove 13. The locking groove 13 is a slope angle friction locking. The locking part of the T-slot 2 is provided with an elastic snap-fit ​​component. The locking groove 13 is used to engage the elastic snap-fit ​​component.

[0024] The working principle of the above embodiments is as follows: In use, after the hydraulic cylinder 4 is started, it pushes the push block 15 forward. The push block 15 presses the movable plate 9 through the inclined guide surface, causing the two movable plates 9 to expand outward synchronously. At this time, the locking plate 12 is in an inclined state. When the TX clamp 6 reaches the predetermined position, the push block 15 continues to move forward and passes the inclined section of the movable plate 9. The pressure of the push block 15 on the movable plate 9 is released, the spring 8 begins to reset, and pushes the movable plate 9 to retract inward, causing the connecting plate 11 and the locking plate 12 to return to their original posture. The locking groove 13 re-forms a high-friction angle inclined surface. Under the pre-pressure of the spring 8, the locking groove 13 tightly engages with the elastic snap-fit ​​in the T-slot 2 to achieve mechanical self-locking. The clamp completes the positioning and fixing. Figure 5 (Structural form) When unlocking is required, the hydraulic cylinder 4 drives the push block 15 to move backward. The inclined surface of the push block 15 presses the movable plate 9 again, causing it to expand outward. The locking plate 12 tilts accordingly, the angle of the locking groove 13 changes, the friction between it and the elastic snap-fit ​​member decreases, the elastic snap-fit ​​member disengages from the locking groove 13, the locking state is released, and the sliding block 5 can drive the TX clamp 6 to slide in the T-slot 2. The whole process is automatically completed by the mechanical structure without additional control. It can still maintain the locking state after the power is cut off.

[0025] It should be noted that the control method of this utility model is controlled by a controller. The control circuit of the controller can be implemented by those skilled in the art through simple programming. The power supply is also common knowledge in the field. Furthermore, this utility model is mainly used to protect mechanical devices, so the control method and circuit connection will not be explained in detail here.

[0026] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A modular split-type hydraulic clamp, comprising a punch press die (1); characterized in that: It also includes a mounting block (3) fixed to the lower end face of the punch die (1), a hydraulic cylinder (4) mounted on the mounting block (3), a connecting foot (7) connected to the output end of the hydraulic cylinder (4), and a self-locking component connected to the connecting foot (7). The lower end of the self-locking assembly is equipped with a TX clamp (6). The lower end face of the punch die (1) has two T-slots (2). There are two hydraulic cylinders (4), each corresponding to one T-slot (2). The self-locking assembly is located inside the T-slot (2). The self-locking assembly is used to lock the position of the TX clamp (6). The self-locking assembly includes a sliding block (5) slidably connected inside the T-slot (2), four springs (8) connected to the inner wall of the sliding block (5), a movable plate (9) connected to the other end of two springs (8), a connecting block (10) connected to the outer side of the movable plate (9), a connecting plate (11) fixed to the outer side of the connecting block (10), and a locking plate (12) fixed to the surface of the connecting plate (11). Two springs (8) form a pair, and each pair of springs is connected to a movable plate (9). The springs (8) allow the movable plate (9) to have floating space.

2. The combined split-type hydraulic clamp according to claim 1, characterized in that: The self-locking assembly includes a push block (15) connected to the connecting foot (7) and a ball bearing (14) movably mounted on the connecting plate (11). The push block (15) is located between two movable plates (9) and can lock the movable plates (9) in the middle. The movable plates (9) have no floating space. When the push block (15) moves, the movable plates (9) will tilt accordingly. The ball bearing (14) reduces the friction when the sliding block (5) moves.

3. A combined split-type hydraulic clamp according to claim 2, characterized in that: The contact surfaces of the movable plate (9) and the push block (15) are both inclined, and the hydraulic cylinder (4) is used to push the push block (15) to move within the sliding block (5).

4. A combined split-type hydraulic clamp according to claim 1, characterized in that: The surface of the locking plate (12) is provided with a locking groove (13), which is a slope angle friction locking. The locking part of the T-shaped groove (2) is provided with an elastic snap-fit ​​component, and the locking groove (13) is used to connect the elastic snap-fit ​​component.

5. A combined split-type hydraulic clamp according to claim 3, characterized in that: The push block (15) moves along the direction of the T-slot (2) under the drive of the hydraulic cylinder (4). It has inclined guide surfaces on both sides, which slide in contact with the corresponding inclined mating surfaces on the movable plate (9).

6. A combined split-type hydraulic clamp according to claim 5, characterized in that: When the push block (15) moves forward under the action of the hydraulic cylinder (4), its inclined surface continues to push the movable plate (9) to maintain the outward expansion state until the sliding block (5) drives the TX clamp (6) to fully enter the predetermined position of the T-slot (2).

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