A hydraulic clamp

Abstract

The application relates to a hydraulic clamp, and relates to the technical field of clamps. The hydraulic clamp comprises a hydraulic cylinder arranged on a mounting frame, two groups of clamping bodies for clamping a workpiece, the hydraulic cylinder is connected with the two groups of clamping bodies through a transmission assembly, and the extension and retraction movement of the hydraulic cylinder is converted into the clamping movement of the two groups of clamping bodies on the workpiece. The transmission assembly comprises: a sliding block which is slidably arranged on the mounting frame and connected with the hydraulic cylinder; and a connecting block which is in an L-shaped structure and rotationally arranged at a corner of the mounting frame, the two ends of the connecting block are rotationally connected with the sliding block and the clamping body respectively, and the sliding block drives the two groups of clamping bodies to slide in the direction of approaching each other or moving away from each other through the two groups of connecting blocks when the sliding block slides. After the workpiece is placed on the mounting frame, the hydraulic cylinder is started to drive the sliding block to slide, the sliding block simultaneously drives a plurality of connecting blocks to rotate, and then drives the two groups of clamping bodies to approach each other, so that the two opposite sides of the workpiece are clamped, and the clamping stability of the hydraulic clamp is improved.

Description

Technical Field

[0001] This application relates to the technical field of clamps, and in particular to a hydraulic clamp. Background Technology

[0002] A sofa bed is a piece of furniture that can be used as both a sofa and a bed. Modern home furnishings emphasize simplicity, and multifunctional furniture is becoming an increasingly popular choice. Sofa beds are one such example. In small apartments, a sofa bed is essential to accommodate occasional guests.

[0003] Hydraulic clamps, as key clamping devices in industrial automation, are widely used in machining, assembly lines and other scenarios. Their core function is to achieve rapid positioning and stable clamping of workpieces through hydraulic drive.

[0004] Currently, traditional hydraulic clamps typically have mounting slots on the fixture. A hydraulic cylinder drives the clamping plate to slide on one side of the mounting slot. When in use, the workpiece is placed in the mounting slot, and then the hydraulic cylinder drives the clamping plate to slide, ultimately clamping and fixing the workpiece in the mounting slot.

[0005] However, traditional hydraulic clamps push the workpiece to slide on one side of the clamping plate and eventually press it against the mounting groove, resulting in uneven force on the workpiece. At the same time, the single clamping plate sliding method is not very adaptable to the shape and size of the workpiece, which ultimately leads to poor clamping stability of traditional hydraulic clamps. Utility Model Content

[0006] To improve the clamping stability of hydraulic clamps, this application provides a hydraulic clamp.

[0007] This application provides a hydraulic clamp, which adopts the following technical solution: A hydraulic clamp includes a hydraulic cylinder mounted on a mounting frame. The mounting frame has two sets of clamping bodies for clamping a workpiece. The hydraulic cylinder is connected to the two sets of clamping bodies via a transmission assembly, which converts the extension and retraction motion of the hydraulic cylinder into clamping motion of the two sets of clamping bodies on the workpiece. The transmission assembly includes: A sliding block is slidably mounted on a mounting bracket, and a hydraulic cylinder is used to drive the sliding block to slide. The connecting block has an L-shaped structure and is rotatably mounted on the mounting frame at the corner. One end of the connecting block is rotatably mounted on the sliding block, and the other end of the connecting block is rotatably mounted on the clamping body. The sliding block has two sets of connecting blocks symmetrically arranged at opposite ends and is rotatably connected to the two sets of clamping bodies respectively. When the sliding block slides, it drives the two sets of clamping bodies to slide in a direction that moves closer to or further away from each other through the two sets of connecting blocks.

[0008] By adopting the above technical solution, after the workpiece is placed on the mounting frame, the hydraulic cylinder is started to drive the sliding block to slide. The sliding block drives multiple sets of connecting blocks to rotate at the same time, thereby driving the two sets of clamping bodies to move closer to each other, thereby clamping the opposite sides of the workpiece and improving the clamping stability of the hydraulic clamp.

[0009] Furthermore, two sets of connecting blocks are provided on both opposite sides of the sliding block. The two sets of connecting blocks at the same end of the sliding block are rotatably connected to different positions of the same clamping body and are used to synchronously drive the clamping body to slide.

[0010] By adopting the above technical solution, two sets of connecting blocks are set for the rotation of each sliding block, which enhances the synchronization and stability of the transmission and reduces the probability of the clamp body being deflected or jammed due to single-point force.

[0011] Furthermore, a buffer pad is provided on the opposite side of the clamping body, and the buffer pad is made of elastic rubber material.

[0012] By adopting the above technical solution, the elastic rubber buffer pad reduces the impact on the workpiece surface during clamping, and reduces the probability of scratches or deformation on the workpiece surface.

[0013] Furthermore, the mounting bracket is provided with a locking block for supporting and positioning the workpiece. The locking block is located between the two sets of clamping bodies and is used to limit the minimum distance between the two sets of clamping bodies.

[0014] By adopting the above technical solution, the locking block supports the bottom of the workpiece and limits the minimum clamping distance of the fixture, preventing excessive clamping from damaging the workpiece or overloading the fixture.

[0015] Furthermore, the mounting bracket has a positioning groove, and the locking block has a trapezoidal groove. The locking block is locked in the positioning groove by a locking bolt set in the trapezoidal groove.

[0016] By adopting the above technical solution, the position of the locking block can be quickly adjusted and fixed by locking bolts, thereby adapting to the processing requirements of workpieces of different sizes. At the same time, the positioning groove design ensures the installation accuracy of the locking block and reduces debugging time.

[0017] Furthermore, a self-locking spring is provided on the mounting bracket. The self-locking spring is mounted on the mounting bracket and abuts against the side of the sliding block away from the hydraulic cylinder. The self-locking spring pushes the sliding block to slide towards the side closer to the hydraulic cylinder, causing the two sets of clamps to move closer to each other.

[0018] By adopting the above technical solution, when the hydraulic system fails, the self-locking spring pushes the sliding block to slide, thereby keeping the clamping body in a clamped state and preventing the workpiece from accidentally loosening and causing an accident. At the same time, the self-locking spring provides mechanical holding force after clamping, which together with the hydraulic cylinder improves the safety of the system.

[0019] Furthermore, the hydraulic cylinder is equipped with a control system for controlling its extension and retraction movements, the control system comprising: A pressure sensor is disposed on the clamping body and is used to detect the clamping force of the clamping body on the workpiece; The controller is electrically connected to the pressure sensor and adjusts the extension and retraction of the hydraulic cylinder according to the feedback signal from the pressure sensor.

[0020] By adopting the above technical solution, the clamping force of the clamping body on the workpiece is monitored in real time by a pressure sensor, and the output of the hydraulic cylinder is dynamically adjusted by a controller to avoid overload or insufficient clamping, thereby achieving high-precision clamping of the workpiece.

[0021] Furthermore, both sets of clamping devices are equipped with infrared photoelectric sensors for detecting whether the workpiece is in position.

[0022] By adopting the above technical solution, the infrared photoelectric sensor detects whether the workpiece is placed in place, reducing the probability of the clamping body being empty and the locking block being damaged when no workpiece is placed.

[0023] In summary, this application includes at least one of the following beneficial technical effects: 1. After placing the workpiece on the locking block, the hydraulic cylinder is activated to drive the sliding block to slide. The sliding block simultaneously drives multiple sets of connecting blocks to rotate, thereby causing the two sets of clamping bodies to move closer to each other, thus clamping the opposite sides of the workpiece and improving the clamping stability of the hydraulic clamp.

[0024] 2. The locking block supports and fixes the bottom of the workpiece, while also limiting the minimum distance between the two sets of clamping bodies, reducing the probability of damage to the workpiece due to excessive clamping by the two sets of clamping bodies. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the hydraulic clamp structure of this application; Figure 2 This is a schematic diagram of a half-section of the hydraulic clamp of this application; Figure 3 yes Figure 2 Enlarged diagram of section A in the middle; Figure 4 This is a schematic diagram of the transmission structure of this application, showing the housing of the mounting bracket.

[0026] Reference numerals: 1. Mounting bracket; 11. Cavity; 12. Positioning groove; 2. Hydraulic cylinder; 3. Clamping body; 31. Buffer pad; 32. Mounting hole; 4. Transmission assembly; 41. Sliding block; 42. Connecting block; 5. Locking block; 51. Trapezoidal groove; 52. Locking bolt; 6. Self-locking spring. Detailed Implementation

[0027] The following is in conjunction with the appendix Figures 1-4 This application will be described in further detail.

[0028] This application discloses a hydraulic clamp.

[0029] Reference Figure 1 and Figure 2 A hydraulic clamp includes a hydraulic cylinder 2 mounted on a mounting frame 1. The mounting frame 1 is provided with two sets of clamping bodies 3 for clamping workpieces. The hydraulic cylinder 2 is connected to the two sets of clamping bodies 3 through a transmission assembly 4, which converts the extension and retraction motion of the hydraulic cylinder 2 into the clamping motion of the two sets of clamping bodies 3 on the workpiece.

[0030] Reference Figure 3 The mounting frame 1 is fixedly mounted on the workbench, and the hydraulic cylinder 2 is fixedly mounted on the side of the mounting frame 1 near the workbench. The transmission assembly 4 includes a sliding block 41 and a connecting block 42. A cavity 11 is provided inside the mounting frame 1, and the sliding block 41 is slidably mounted in the cavity 11 inside the mounting frame 1. The movable rod of the hydraulic cylinder 2 is fixedly connected to the sliding block 41, and the hydraulic cylinder 2 is used to drive the sliding block 41 to slide within the mounting frame 1. The connecting block 42 has an L-shaped structure, and the corner of the connecting block 42 is rotatably mounted on the mounting frame 1. One end of the connecting block 42 is rotatably mounted on the sliding block 41, and the other end of the connecting block 42 is rotatably mounted on the bottom of the clamping body 3. Two sets of connecting blocks 42 are symmetrically arranged at opposite ends of the sliding block 41, and the ends of the two sets of connecting blocks 42 away from the sliding block 41 are respectively rotatably connected to the two sets of clamping bodies 3. When the hydraulic cylinder 2 drives the sliding block 41 to slide, it drives the two sets of connecting blocks 42 to rotate, thereby driving the two sets of clamping bodies 3 to slide in a direction that is closer to or farther from each other, thereby achieving the clamping or loosening of the workpiece.

[0031] Reference Figure 4 To ensure the clamping effect of the fixture body 3 on the workpiece, two sets of connecting blocks 42 are provided on both opposite sides of the sliding block 41. The two sets of connecting blocks 42 at the same end of the sliding block 41 are rotatably connected to different positions of the same fixture body 3. The line connecting the two sets of connecting blocks 42 is perpendicular to the sliding direction of the fixture body 3. Ultimately, the two sets of connecting blocks 42 synchronously drive the fixture body 3 to slide, reducing the probability of the fixture body 3 deviating during sliding.

[0032] Reference Figure 1In order to improve the clamping effect of the clamping body 3 on the workpiece, a buffer pad 31 is provided on the opposite side of the clamping body 3. The buffer pad 31 is made of elastic rubber material. When the two sets of clamping bodies 3 clamp the workpiece, the buffer pad 31 reduces the probability of damage to the workpiece and also improves the clamping stability of the workpiece.

[0033] Reference Figure 1 The mounting bracket 1 is equipped with a locking block 5 for supporting and positioning the bottom of the workpiece. The locking block 5 is located between the two sets of clamping bodies 3. At the same time, the width of the locking block 5 is used to limit the minimum distance between the two sets of clamping bodies 3. When the two sets of clamping bodies 3 are pressed against the opposite side walls of the locking block 5, the locking block 5 prevents the two sets of clamping bodies 3 from getting closer, thereby reducing the probability of the two sets of clamping bodies 3 over-clamping the workpiece and causing damage.

[0034] Reference Figure 3 The mounting bracket 1 has a positioning groove 12 and the locking block 5 has a trapezoidal groove 51. When the locking block 5 is installed on the mounting bracket 1, the hydraulic cylinder 2 is activated to drive the sliding block 41 to slide, and then the two sets of clamping bodies 3 are pressed against the opposite side walls of the locking block 5. Then the locking bolt 52 is placed in the trapezoidal groove 51, and finally the locking bolt 52 is rotated to lock the locking bolt in the positioning groove 12, thereby realizing the locking and fixing of the locking block 5.

[0035] Reference Figure 3 A self-locking spring 6 is provided on the mounting bracket 1. The self-locking spring 6 is fixedly installed on the top of the cavity 11. The end of the self-locking spring 6 away from the top of the cavity 11 is pressed against the side of the sliding block 41 away from the hydraulic cylinder 2. The self-locking spring 6 pushes the sliding block 41 to slide closer to the hydraulic cylinder 2, thereby making the two sets of clamping bodies 3 move closer to each other. Finally, when the hydraulic cylinder 2 has no force on the sliding block 41, the self-locking spring 6 pushes the sliding block 41 to slide closer to the hydraulic cylinder 2, and finally presses against the opposite side walls of the workpiece or locking block 5.

[0036] Reference Figure 2 The hydraulic cylinder 2 is equipped with a control system for controlling its telescopic movement. The control system includes a pressure sensor and a controller. The pressure sensor is fixedly mounted on the clamping body 3 and is used to detect the clamping force of the clamping body 3 on the workpiece. The controller is fixedly mounted on the mounting bracket 1 and connected to the hydraulic cylinder 2. The controller adjusts the telescopic movement of the hydraulic cylinder 2 according to the feedback signal of the pressure sensor, thereby controlling the clamping force of the two sets of clamping bodies 3 on the workpiece. In this embodiment, the controller is a PLC controller that controls the hydraulic cylinder 2's fluid inlet and outlet system. By switching and adjusting the hydraulic pressure values ​​of the hydraulic cylinder 2's inlet and outlet, the force exerted by the hydraulic cylinder 2 on the sliding block 41 is adjusted.

[0037] Reference Figure 1Two sets of clamping bodies 3 are fixedly installed on opposite sides with infrared photoelectric sensors for detecting whether the workpiece is in place. The clamping body 3 has mounting holes 32 for installing the infrared photoelectric sensors. Only when the infrared photoelectric sensors detect that the workpiece is in place can the clamping body 3 be controlled to clamp the workpiece.

[0038] Reference Figure 2 The mounting frame 1 is equipped with multiple sets of hydraulic cylinders 2 and transmission components 4 to facilitate the clamping of multiple sets of workpieces. In this embodiment, the mounting frame 1 is equipped with two sets of hydraulic cylinders 2 and transmission components 4 to facilitate the clamping of two sets of workpieces.

[0039] The working principle of this application embodiment is as follows: After the workpiece is placed on the locking block 5, the hydraulic cylinder 2 is activated to drive the sliding block 41 to slide. The sliding block 41 simultaneously drives multiple sets of connecting blocks 42 to rotate, thereby causing the two sets of clamping bodies 3 to move closer to each other, thereby clamping the opposite sides of the workpiece and improving the clamping stability of the hydraulic clamp.

[0040] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A hydraulic clamp, characterized in that: The device includes a hydraulic cylinder (2) mounted on a mounting frame (1). The mounting frame (1) is provided with two sets of clamping bodies (3) for clamping the workpiece. The hydraulic cylinder (2) is connected to the two sets of clamping bodies (3) through a transmission assembly (4), which converts the extension and retraction motion of the hydraulic cylinder (2) into the clamping motion of the two sets of clamping bodies (3) on the workpiece. The transmission assembly (4) includes: A sliding block (41) is slidably mounted on a mounting bracket (1), and a hydraulic cylinder (2) is used to drive the sliding block (41) to slide. The connecting block (42) has an L-shaped structure and is rotatably mounted on the mounting bracket (1) at the corner. One end of the connecting block (42) is rotatably mounted on the sliding block (41), and the other end of the connecting block (42) is rotatably mounted on the clamping body (3). The sliding block (41) has two sets of connecting blocks (42) symmetrically arranged at opposite ends and is rotatably connected to the two sets of clamping bodies (3) respectively. When the sliding block (41) slides, it drives the two sets of clamping bodies (3) to slide in a direction that is close to or far away from each other through the two sets of connecting blocks (42).

2. A hydraulic clamp according to claim 1, characterized in that: Two sets of connecting blocks (42) are provided on both opposite sides of the sliding block (41). The two sets of connecting blocks (42) at the same end of the sliding block (41) are rotatably connected to different positions of the same clamping body (3) and used to synchronously drive the clamping body (3) to slide.

3. A hydraulic clamp according to claim 2, characterized in that: A buffer pad (31) is provided on the opposite side of the clamping body (3), and the buffer pad (31) is made of elastic rubber material.

4. A hydraulic clamp according to claim 1, characterized in that: The mounting bracket (1) is provided with a locking block (5) for supporting and positioning the workpiece. The locking block (5) is located between the two sets of clamping bodies (3) and is used to limit the minimum distance between the two sets of clamping bodies (3).

5. A hydraulic clamp according to claim 4, characterized in that: The mounting bracket (1) has a positioning groove (12), and the locking block (5) has a trapezoidal groove (51). The locking block (5) is locked in the positioning groove (12) by a locking bolt (52) set in the trapezoidal groove (51).

6. A hydraulic clamp according to claim 1, characterized in that: The mounting bracket (1) is provided with a self-locking spring (6). The self-locking spring (6) is mounted on the mounting bracket (1) and abuts against the side of the sliding block (41) away from the hydraulic cylinder (2). The self-locking spring (6) pushes the sliding block (41) to slide towards the side closer to the hydraulic cylinder (2) and makes the two sets of clamping bodies (3) move closer to each other.

7. A hydraulic clamp according to claim 1, characterized in that: The hydraulic cylinder (2) is equipped with a control system for controlling the extension and retraction of the hydraulic cylinder (2), the control system comprising: A pressure sensor is provided on the fixture body (3) and is used to detect the clamping force of the fixture body (3) on the workpiece; The controller is electrically connected to the pressure sensor and adjusts the extension and retraction of the hydraulic cylinder (2) according to the feedback signal from the pressure sensor.

8. A hydraulic clamp according to claim 3, characterized in that: Both sets of clamping bodies (3) are equipped with infrared photoelectric sensors for detecting whether the workpiece is in place.

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