Hydraulic synchronous clamping device and clamping method

Abstract

According to the hydraulic synchronous clamping device and method, the distance between the end faces of piston rods on the left side and the right side is flexibly adjusted through a synchronous retainer, then the initial stroke difference between the end faces of the piston rods on the left side and the right side is compensated, and it is guaranteed that the piston rods on the left side and the right side stretch out and draw back synchronously; on the basis, the piston rods on the left side and the right side synchronously move to tighten the first notches, the clamping holes are driven to elastically shrink and deform so as to clamp the guide rods, and then flexible positioning and clamping of the fixed parts on the mounting base are achieved. The clamping position can be flexibly adjusted, and the moving synchronism of the double-side hydraulic rod is guaranteed.

Description

Technical Field

[0001] This invention belongs to the technical field of hydraulically driven clamping devices, specifically a hydraulic synchronous clamping device and clamping method. Background Technology

[0002] In industrial practice, load movement exists within various interconnected mechanical structures. To maintain a stable loading process, the fixed end needs to be reliably secured. During loading, gaps or loosening at the fixed end can lead to unstable loading forces and deviations in the direction of the loading force, which can have serious consequences for the mechanical structure. Because hydraulic systems offer advantages such as high power density, smooth transmission, high control precision, and a wide adjustment range, existing technologies often incorporate double-sided synchronous clamping mechanisms. These mechanisms use two sets of parallel hydraulic rods to pull clamping blocks and hold the workpiece. However, existing double-sided hydraulic clamping devices have the following problems: The clamping position is fixed, making it difficult to adjust the clamping position flexibly; The difference in stroke between the two hydraulic rods makes it difficult to ensure the synchronization of their extension and retraction.

[0003] Therefore, in view of the above-mentioned problems of existing bilateral hydraulic clamping devices, the present invention discloses a hydraulic synchronous clamping device and clamping method. Summary of the Invention

[0004] This invention discloses a hydraulic synchronous clamping device and clamping method, which can flexibly adjust the clamping position and ensure the synchronous movement of the bilateral hydraulic rods.

[0005] This invention is achieved through the following technical solution: A hydraulic synchronous clamping device includes a mounting base. Clamping blocks are symmetrically arranged on the left and right sides of the mounting base. Each clamping block has a clamping hole with a first notch. A guide rod is slidably mounted inside the clamping hole. A piston rod for pressing the first notch is provided at the first notch on both sides. A synchronous retainer is provided between the ends of the piston rods on both sides. A laser sensor is provided at the ends of the piston rods on both sides. A scale is provided on one side of each laser sensor. The laser sensor is connected to an external computer. The synchronous retainer includes a first retaining part, a second retaining part, and an intermediate adapter. The first retaining part and the second retaining part are slidably arranged on the left and right sides of the intermediate adapter in a direction parallel to the piston rod axis. The first retaining part is axially movably connected to the end of the left piston rod, and the second retaining part is axially movably connected to the end of the right piston rod.

[0006] To better realize the present invention, the first holding part further includes a first connecting rod, a first slider, a first locking member, and a first adjusting member. The first end of the first connecting rod is sleeved with the end of the piston rod on the left side. The second end of the first connecting rod is slidably connected to the slide groove on the left side of the intermediate adapter frame through the first slider. The interior of the slide groove is provided with a first adjusting member that drives the first slider to slide along the axial direction of the piston rod. The side wall of the slide groove is provided with a first locking member for pressing and fixing the first slider.

[0007] To better realize the present invention, the second holding part further includes a second connecting rod, a second slider, a second locking member, and a second adjusting member. The first end of the second connecting rod is sleeved with the end of the piston rod on the right side. The second end of the second connecting rod is slidably connected to the slide groove on the right side of the intermediate adapter frame through the second slider. The interior of the slide groove is provided with a second adjusting member that drives the second slider to slide along the axial direction of the piston rod. The side wall of the slide groove is provided with a second locking member for pressing and fixing the second slider.

[0008] To better realize the present invention, the intermediate adapter is further provided with a guide hole, and a guide shaft is slidably installed inside the guide hole, the guide shaft being arranged parallel to the axis of the piston rod.

[0009] To better realize the present invention, the mounting base further includes an upper mounting base and a lower mounting base. Clamping blocks are symmetrically fitted on the left and right sides of the lower mounting base. A lower half hole is provided at the top of the lower mounting base. The upper mounting base is detachably installed on the top of the lower mounting base. An upper half hole is provided at the bottom of the upper mounting base. The upper half hole and the lower half hole constitute a mounting hole.

[0010] To better realize the present invention, the lower half mounting base is further provided with a lower threaded hole and a lower slot on the top of the left and right end faces of the lower half hole, and the upper half mounting base is provided with an upper through hole and an upper locking block on the bottom of the left and right end faces of the upper half hole. The lower threaded hole and the upper through hole are coaxially arranged, and the lower slot and the upper locking block are correspondingly engaged.

[0011] To better realize the present invention, a piston rod mounting hole is further provided on one side of the clamping hole, which penetrates the first notch, and a piston rod is inserted into the piston rod mounting hole.

[0012] To better realize the present invention, a second notch is provided at the end of the clamping hole away from the piston rod mounting hole, and an adaptation hole is provided at the end of the second notch away from the clamping hole.

[0013] A hydraulic synchronous clamping method, based on a hydraulic synchronous clamping device, includes the following steps: Step 1: Control the piston rods on both sides to extend and retract synchronously for the first stroke via an external computer. Then, illuminate the scale with a laser sensor and read the initial stroke difference Ha between the end faces of the piston rods on both sides via the scale. If the initial stroke difference Ha is greater than or equal to the calibrated stroke Hb, proceed to step 1; if the initial stroke difference Ha is less than the calibrated stroke Hb, proceed to step 2. Step 2: Slide the first or second holding part along the axis with the initial stroke difference Ha, then illuminate the scale with the laser sensor, and read the adjustment stroke difference Ht between the piston rod end faces on the left and right sides through the scale. Continue until the adjustment stroke difference Ht is less than the calibrated stroke Hb, then proceed to the next step. Step 3: Fix the fixed component to the mounting base, fix the first holding part and the second holding part on the left and right sides of the intermediate adapter, and then slide the clamping hole along the guide rod until the component slides to the predetermined position; Step 4: The piston rods on the left and right sides are moved synchronously by the external computer to tighten the first notch. The clamping hole is elastically reduced by the first notch to clamp the guide rod, thereby fixing the clamping position of the component.

[0014] Compared with the prior art, the present invention has the following advantages and beneficial effects: (1) The present invention drives the piston rod to move by a hydraulic cylinder, thereby squeezing the piston rod mounting hole. The clamping hole on the clamping block is elastically reduced and deformed to clamp the guide rod, thereby realizing flexible adjustment and fixation of the clamping position; (2) The present invention provides a synchronizing retainer between the piston rods on both sides, thereby synchronizing the movement of the piston rods on both sides and avoiding the situation where the clamping device jams or gets stuck due to the difference in the stroke of the piston rods on both sides. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the hydraulic synchronous clamping device; Figure 2 This is a schematic diagram of the structure of a synchronization retainer; Figure 3 This is a schematic diagram of the installation of the intermediate adapter frame; Figure 4 This is a schematic diagram of the mounting base. Figure 5 This is a schematic diagram showing the initial stroke difference between the end faces of the piston rods on the left and right sides.

[0016] Wherein: 1-Mounting base; 2-Mounting hole; 3-Clamping block; 4-Clamping hole; 5-Piston rod mounting hole; 6-Piston rod; 7-Synchronizer; 8-Guide rod; 9-Scale; 11-Upper half mounting base; 12-Lower half mounting base; 41-Adaptation hole; 111-Upper locking block; 121-Lower locking groove; 71-First retaining part; 72-Second retaining part; 73-Intermediate adapter; 711-First connecting rod; 712-First slider; 713-First locking element; 714-First adjusting element; 712-Second connecting rod; 722-Second slider; 723-Second locking element; 724-Second adjusting element; 731-Guide hole; 732-Guide shaft. Detailed Implementation

[0017] Example 1: This embodiment provides a hydraulic synchronous clamping device, such as... Figure 1 and Figure 2 As shown, the device includes a mounting base 1, with clamping blocks 3 symmetrically arranged on its left and right sides. Each clamping block 3 has a clamping hole 4 with a first notch, and a guide rod 8 is slidably installed inside the clamping hole 4. A piston rod 6 for pressing the first notch is provided at the first notch on both sides, and a synchronous retainer 7 is provided between the ends of the piston rods 6 on both sides. A laser sensor is provided at the ends of the piston rods 6 on both sides, and a scale 9 is provided on one side of the laser sensor. The laser sensor is connected to an external computer. The synchronous retainer 7 includes a first retaining part 71, a second retaining part 72, and an intermediate adapter 73. The first retaining part 71 and the second retaining part 72 are slidably arranged on the left and right sides of the intermediate adapter 73 in a direction parallel to the axis of the piston rod 6. The first retaining part 71 is axially movably connected to the end of the left piston rod 6, and the second retaining part 72 is axially movably connected to the end of the right piston rod 6.

[0018] By moving the first retaining part 71 or the second retaining part 72 along the axial direction of the piston rod 6, the stroke difference between the end faces of the piston rods 6 on the left and right sides is compensated by the axial movement stroke of the first retaining part 71 or the second retaining part 72. This is equivalent to indirectly making the end faces of the piston rods 6 on the left and right sides flush, thereby ensuring that the movement of the piston rods 6 on the left and right sides is close to synchronous during the subsequent clamping process.

[0019] A hydraulic synchronous clamping method includes the following steps: Step 1: Control the left and right piston rods 6 to synchronously extend and retract for the first stroke via an external computer. Then, illuminate the scale 9 with a laser sensor and read the initial stroke difference Ha between the end faces of the left and right piston rods 6 using the scale 9. The initial stroke difference Ha is as follows: Figure 5As shown, if the initial travel difference Ha is greater than or equal to the calibrated travel Hb, proceed to step 2; if the initial travel difference Ha is less than the calibrated travel Hb, proceed to step 3. Step 2: Slide the first holding part 71 or the second holding part 72 axially with the initial stroke difference Ha, and then illuminate the scale 9 with the laser sensor. Read the adjustment stroke difference Ht between the end faces of the piston rod 6 on the left and right sides through the scale 9. Continue until the adjustment stroke difference Ht is less than the calibrated stroke Hb, and then proceed to step 3. Step 3: Fix the fixed component to the mounting base 1, fix the first retaining part 71 and the second retaining part 72 on the left and right sides of the intermediate adapter 73, and then slide the clamping hole 4 along the guide rod 8 until the component slides to the predetermined position. Step 4: The piston rods 6 on the left and right sides are moved synchronously by the external computer to tighten the first notch. The clamping hole 4 is elastically reduced by the first notch to clamp the guide rod 8, thereby fixing the clamping position of the component.

[0020] Example 2: This embodiment discloses a hydraulic synchronous clamping device, which is an improvement on Embodiment 1, such as... Figure 2 As shown, the first holding part 71 includes a first connecting rod 711, a first slider 712, a first locking member 713, and a first adjusting member 714. The first end of the first connecting rod 711 is sleeved with the end of the piston rod 6 on the left side. The second end of the first connecting rod 711 is slidably connected to the slide groove on the left side of the intermediate adapter 73 through the first slider 712. The first adjusting member 714, which drives the first slider 712 to slide, is arranged inside the slide groove along the axial direction of the piston rod 6. The first locking member 713, which is used to press and fix the first slider 712, is provided through the side wall of the slide groove.

[0021] The second holding part 72 includes a second connecting rod 721, a second slider 722, a second locking member 723, and a second adjusting member 724. The first end of the second connecting rod 721 is sleeved with the end of the piston rod 6 on the right side. The second end of the second connecting rod 721 is slidably connected to the slide groove on the right side of the intermediate adapter 73 through the second slider 722. The interior of the slide groove is provided with a second adjusting member 724 along the axial direction of the piston rod 6 to drive the second slider 722 to slide. The side wall of the slide groove is provided with a second locking member 723 for pressing and fixing the second slider 722.

[0022] The first retaining part 71 and the second retaining part 72 have the same structure and principle, so the first retaining part 71 will be used for explanation here. Ideally, the end faces of the piston rods 6 on the left and right sides should be flush. However, in actual installation, it is difficult to ensure that the ends of the piston rods 6 on the left and right sides are flush, resulting in an axial height difference between the ends of the piston rods 6 on the left and right sides. This height difference will cause an initial stroke difference Ha when the piston rods 6 on the left and right sides extend and retract. In order to ensure that the strokes of the piston rods 6 on the left and right sides are synchronized, the first retaining part 71 or the second retaining part 72 is moved along the axial direction of the piston rods 6 on the left and right sides of the intermediate adapter 73, and the initial stroke difference Ha is compensated by the axial movement stroke of the first retaining part 71 or the second retaining part 72. That is, the first adjusting member 714 drives the first slider 712 to slide along the slide groove on the left side of the intermediate adapter 73, and the initial stroke difference Ha is compensated by the sliding stroke. After the first slider 712 slides into place, the first locking member 713 can lock the first slider 712, thereby completing the axial movement adjustment of the first retaining part 71.

[0023] Furthermore, the first adjusting component 714 includes an adjusting motor and an adjusting screw, and the first slider 712 is provided with an adjusting threaded hole that is threadedly connected to the adjusting screw. After the initial stroke difference Ha between the end faces of the left and right piston rods 6 is measured by the laser sensor and the scale 9, the adjusting motor can be controlled to rotate by an external computer. The adjusting motor drives the adjusting screw to rotate, which in turn drives the first slider 712 to slide along the slide groove according to the pitch of the adjusting screw, thereby achieving precise adjustment of the axial position of the first slider 712 in the slide groove.

[0024] The rest of this embodiment is the same as that of Embodiment 1, so it will not be described again.

[0025] Example 3: This embodiment discloses a hydraulic synchronous clamping device and clamping method, which is an optimization based on embodiment 1 or 2, such as... Figure 3 As shown, the intermediate adapter 73 is provided with a guide hole 731, and a guide shaft 732 is slidably installed inside the guide hole 731. The guide shaft 732 is arranged parallel to the axis of the piston rod 6.

[0026] After the first retaining part 71 and the second retaining part 72 are fixed, the intermediate adapter 73 moves along with the piston rod 6. In order to ensure that the moving direction of the intermediate adapter 73 is parallel to the axis of the piston rod 6, a guide shaft 732 parallel to the axis of the piston rod 6 is provided. Through the sliding fit between the guide shaft 732 and the guide hole 731, the movement of the intermediate adapter 73 is guided, further ensuring that the extension and retraction directions of the first retaining part 71 and the second retaining part 72 are parallel to the axis of the piston rod 6.

[0027] The rest of this embodiment is the same as that of embodiment 1 or 2, so it will not be described again.

[0028] Example 4: This embodiment discloses a hydraulic synchronous clamping device and clamping method, which is optimized based on any one of embodiments 1-3, such as... Figure 4 As shown, the mounting base 1 includes an upper mounting base 11 and a lower mounting base 12. Clamping blocks 3 are symmetrically fitted on the left and right sides of the lower mounting base 12. A lower half hole is provided on the top of the lower mounting base 12. The upper mounting base 11 is detachably installed on the top of the lower mounting base 12. An upper half hole is provided on the bottom of the upper mounting base 11. The upper half hole and the lower half hole form a mounting hole 2.

[0029] The object to be positioned and fixed is pre-installed into the lower half hole at the top of the lower half mounting base 12. Then, the upper half mounting base 11 is snapped and fixed on the top of the lower half mounting base 12, so that the upper half hole and the lower half hole cooperate to form the mounting hole 2. The object to be fixed is fixed through the mounting hole 3.

[0030] Furthermore, such as Figure 3 As shown, the top of the lower mounting base 12 is provided with a lower threaded hole and a lower slot 121 on the left and right end faces of the lower half hole, and the bottom of the upper mounting base 11 is provided with an upper through hole and an upper locking block 111 on the left and right end faces of the upper half hole. The lower threaded hole and the upper through hole are coaxially arranged, and the lower slot 121 and the upper locking block 111 are correspondingly engaged.

[0031] After aligning and inserting the upper locking block 111 with the lower locking slot 121, the upper mounting base 11 can be smoothly inserted into the top of the lower mounting base 12. Then, the connecting screws are screwed into the aligned lower threaded hole and upper through hole, thus achieving convenient fixed installation of the upper mounting base 11 on the top of the lower mounting base 12. When it is necessary to disassemble the object, simply remove the connecting screws and remove the upper mounting base 11 from the top of the lower mounting base 12 to easily disassemble the fixed object.

[0032] The rest of this embodiment is the same as any one of embodiments 1-3, so it will not be described again.

[0033] Example 5: This embodiment discloses a hydraulic synchronous clamping device and clamping method, which is an optimization based on any one of embodiments 1-4. A piston rod mounting hole 5, penetrating a first notch, is provided on one side of the clamping hole 4, and a piston rod 6 is inserted into the piston rod mounting hole 5. A second notch is provided at the end of the clamping hole 4 away from the piston rod mounting hole 5, and an adaptation hole 41 is provided at the end of the second notch away from the clamping hole 4. By providing the second notch and the adaptation hole 41, the stress condition of the clamping hole 4 during elastic shrinkage deformation can be improved, avoiding plastic deformation of the clamping hole 4.

[0034] The rest of this embodiment is the same as any one of embodiments 1-4, so it will not be described again.

[0035] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A hydraulic synchronous clamping device, comprising a mounting base (1), characterized in that, The mounting base (1) is symmetrically provided with clamping blocks (3) on the left and right sides. The clamping blocks (3) are provided with clamping holes (4) with first notches. The clamping holes (4) are slidably fitted with guide rods (8). The first notches on the left and right sides are provided with piston rods (6) for squeezing the first notches. Synchronous retainers (7) are provided between the ends of the piston rods (6) on the left and right sides. The ends of the piston rods (6) on the left and right sides are provided with laser sensors. A scale (9) is provided on one side of the laser sensor. The laser sensor is connected to an external computer. The synchronous retainer (7) includes a first retaining part (71), a second retaining part (72), and an intermediate adapter (73). The first retaining part (71) and the second retaining part (72) are slidably provided on the left and right sides of the intermediate adapter (73) in a direction parallel to the axis of the piston rods (6). The first retaining part (71) is axially movable to the end of the piston rod (6) on the left side, and the second retaining part (72) is axially movable to the end of the piston rod (6) on the right side.

2. The hydraulic synchronous clamping device according to claim 1, characterized in that, The first retaining part (71) includes a first connecting rod (711), a first slider (712), a first locking member (713), and a first adjusting member (714). The first end of the first connecting rod (711) is sleeved with the end of the piston rod (6) on the left side. The second end of the first connecting rod (711) is slidably connected to the slide groove on the left side of the intermediate adapter (73) through the first slider (712). The first adjusting member (714) that drives the first slider (712) to slide is arranged inside the slide groove along the axial direction of the piston rod (6). The first locking member (713) for pressing and fixing the first slider (712) is provided through the side wall of the slide groove.

3. The hydraulic synchronous clamping device according to claim 1, characterized in that, The second retaining part (72) includes a second connecting rod (721), a second slider (722), a second locking member (723), and a second adjusting member (724). The first end of the second connecting rod (721) is sleeved with the end of the piston rod (6) on the right side. The second end of the second connecting rod (721) is slidably connected to the slide groove on the right side of the intermediate adapter (73) through the second slider (722). The interior of the slide groove is provided with a second adjusting member (724) that drives the second slider (722) to slide along the axial direction of the piston rod (6). A second locking member (723) for pressing and fixing the second slider (722) is provided through the side wall of the slide groove.

4. A hydraulic synchronous clamping device according to any one of claims 1-3, characterized in that, The intermediate adapter (73) is provided with a guide hole (731), and a guide shaft (732) is slidably installed inside the guide hole (731). The guide shaft (732) is arranged parallel to the axis of the piston rod (6).

5. A hydraulic synchronous clamping device according to any one of claims 1-3, characterized in that, The mounting base (1) includes an upper mounting base (11) and a lower mounting base (12). Clamping blocks (3) are symmetrically fitted on the left and right sides of the lower mounting base (12). A lower half hole is provided on the top of the lower mounting base (12). The upper mounting base (11) is detachably installed on the top of the lower mounting base (12). An upper half hole is provided on the bottom of the upper mounting base (11). The upper half hole and the lower half hole constitute a mounting hole (2).

6. The hydraulic synchronous clamping device and clamping method according to claim 5, characterized in that, The lower half mounting base (12) has a threaded hole and a slot (121) on the left and right sides of the lower half hole at the top. The upper half mounting base (11) has an upper through hole and an upper locking block (111) on the left and right sides of the upper half hole at the bottom. The threaded hole and the through hole are coaxially arranged, and the slot (121) and the upper locking block (111) are correspondingly engaged.

7. A hydraulic synchronous clamping device according to any one of claims 1-3, characterized in that, A piston rod mounting hole (5) is provided on one side of the clamping hole (4) through the first notch, and a piston rod (6) is inserted into the piston rod mounting hole (5).

8. A hydraulic synchronous clamping device according to claim 7, characterized in that, The clamping hole (4) is provided with a second notch at one end away from the piston rod mounting hole (5), and an adaptation hole (41) is provided at the other end of the second notch away from the clamping hole (4).

9. A hydraulic synchronous clamping method, implemented based on a hydraulic synchronous clamping device according to any one of claims 1-8, characterized in that, Includes the following steps: Step 1: Control the piston rods (6) on the left and right sides to extend and retract synchronously for the first stroke through an external computer. Then, illuminate the scale (9) with a laser sensor and read the initial stroke difference Ha between the end faces of the piston rods (6) on the left and right sides through the scale (9). If the initial stroke difference Ha is greater than or equal to the calibrated stroke Hb, proceed to step 2; if the initial stroke difference Ha is less than the calibrated stroke Hb, proceed to step 3. Step 2: Slide the first holding part (71) or the second holding part (72) along the axis with the initial stroke difference Ha, and then illuminate the scale (9) with the laser sensor. Read the adjustment stroke difference Ht between the end faces of the piston rods (6) on the left and right sides with the scale (9). Continue until the adjustment stroke difference Ht is less than the calibrated stroke Hb, and then proceed to step 3. Step 3: Fix the fixed component to the mounting base (1), fix the first retaining part (71) and the second retaining part (72) on the left and right sides of the intermediate adapter (73), and then slide the clamping hole (4) along the guide rod (8) until the component slides to the predetermined position; Step 4: The piston rods (6) on the left and right sides are moved synchronously by the external computer to tighten the first notch. The clamping hole (4) is elastically reduced by the first notch to clamp the guide rod (8) and fix the clamping position of the component.

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