A clamp

Abstract

The present application relates to the technical field of machining, and provides a clamp for fixing a workpiece, comprising: a support platform having a length direction and a width direction; at least two first lifting blocks arranged at intervals along the length direction on the support platform, both sides of the first lifting block being transmissionally connected with a first swing lever, and both sides of the first swing lever being respectively abutted against opposite side walls of the workpiece extending along the length direction; and at least one second lifting block arranged on the support platform, both sides of the second lifting block being transmissionally connected with a second swing lever, and both sides of the second swing lever being respectively abutted against opposite side walls of the workpiece extending along the width direction. The first swing lever and the second swing lever are driven to act by the first lifting block and the second lifting block respectively, so that when the first swing lever and the second swing lever are attached to the inner wall of the workpiece, the swing amplitude can be flexibly attached according to the actual inner cavity profile of the workpiece.

Description

Technical Field

[0001] This invention belongs to the field of machining, and specifically relates to a clamp. Background Technology

[0002] In machining and manufacturing, workpiece clamping and fixing are crucial steps to ensure machining accuracy and production efficiency. Typically, during the forming process such as casting, forging, or welding, workpieces undergo varying degrees of initial deformation due to factors such as the release of internal material stress and uneven cooling and shrinkage. This is especially true for large, thin-walled, or structurally complex workpieces, whose blanks not only exhibit dimensional deviations but also often display irregular and complex deformation characteristics.

[0003] In existing workpiece clamping technologies, rigid positioning structures (such as traditional rigid supports, centering vises, or fixing pins) are mostly used to fix the inner cavity or inner sidewall of the workpiece. These rigid fixtures are designed based on the premise that the workpiece has an ideal geometry or that its deformation is controlled within a very small tolerance range. However, when faced with blanks exhibiting irregular deformation, this "static braking" rigid fixing method reveals significant limitations: On the one hand, rigid fixtures lack the ability to adapt to irregular contours. If the inner cavity of the workpiece shrinks due to deformation, the rigid support block is prone to interference, resulting in the inability to install properly or to force it in. If the inner cavity expands locally, the rigid support point will form a gap with the inner wall of the workpiece, resulting in the loss of positioning reference and insufficient clamping force, making the workpiece prone to loosening or vibration during processing.

[0004] On the other hand, rigid fixtures are highly susceptible to causing secondary deformation of the workpiece. Due to the limited contact area of ​​rigid support points, operators often apply large clamping forces to overcome assembly difficulties caused by blank deformation and ensure machining stability. This causes local contact surfaces to bear extremely high pressure, exceeding the yield limit of thin-walled parts, leading to secondary elastic or even plastic deformation of the workpiece. Once the fixture is released after machining, the workpiece stress is released and springs back, severely damaging the precision of the machined surface and ultimately resulting in product scrap. Summary of the Invention

[0005] To address the aforementioned shortcomings of existing technologies, the technical problem to be solved by this invention is to provide a fixture that, through the linkage of a first lifting block and a second lifting block, drives a first swing rod and a second swing rod to move, so that when the first swing rod and the second swing rod are in contact with the inner wall of the workpiece, the swing amplitude can be flexibly fitted according to the actual inner cavity contour of the workpiece, thus adapting to the clamping requirements of various deformed blank workpieces.

[0006] The technical solution adopted by this invention to solve its technical problem is to provide a clamp for fixing a workpiece, comprising: A support platform, which has both length and width directions; At least two first lifting blocks are spaced apart on the support platform along the length direction. Each of the first lifting blocks is connected to a first swing rod on both sides. The ends of the first swing rods on both sides away from the first lifting blocks abut against the opposite sidewalls of the workpiece that extend along the length direction, so as to fix the workpiece in the width direction. The movement of the first lifting blocks relative to the support platform in the vertical direction causes the first swing rods to swing. At least one second lifting block is disposed on the support platform. A second swing rod is connected to both sides of the second lifting block. The ends of the second swing rods on both sides away from the second lifting block abut against the opposite sidewalls of the workpiece extending along the width direction, so as to fix the workpiece in the length direction. The movement of the second lifting block relative to the support platform in the vertical direction drives the second swing rods to swing.

[0007] In the aforementioned fixture, the first lifting block has a first mounting cavity, in which a first driving rod and a first connecting rod are disposed, and a second connecting rod is also provided through the side wall of the first lifting block; the two ends of the first connecting rod are respectively hinged to the first driving rod and the second connecting rod; the end of the second connecting rod opposite to the first connecting rod is fixedly connected to the first swing rod.

[0008] In the aforementioned fixture, a first driving component is also provided on the support platform. The first driving rod is connected to the output end of the first driving component, and the first driving component is used to drive the first driving rod to rise and fall.

[0009] In the aforementioned fixture, the second lifting block has a second mounting cavity, in which a second driving rod and a third connecting rod are disposed, and a fourth connecting rod is also provided through the side wall of the second lifting block; the two ends of the third connecting rod are respectively hinged to the second driving rod and the fourth connecting rod; the end of the fourth connecting rod opposite to the third connecting rod is fixedly connected to the second swing rod.

[0010] In the aforementioned fixture, a second driving component is also provided on the support platform. The second driving rod is connected to the output end of the second driving component, and the second driving component is used to drive the second driving rod to rise and fall.

[0011] In the aforementioned fixture, a first fixed seat is also provided on the support platform. The first fixed seat has a hollow structure and a first guide hole is formed inside. The first driving member is located inside the first fixed seat, and one end of the first lifting block is slidably inserted into the first guide hole.

[0012] In the aforementioned fixture, a second fixed seat is also provided on the support platform. The second fixed seat has a hollow structure and a second guide hole is formed inside. The second driving member is located inside the second fixed seat, and one end of the second lifting block is slidably inserted into the second guide hole.

[0013] In the aforementioned fixture, the support platform is further provided with a plurality of first support blocks, each first support block is provided with a first slide rail, and each first swing rod is connected with a first slider. The first slider is slidably disposed on the corresponding first slide rail to provide support for the first swing rod.

[0014] In the aforementioned fixture, the support platform is further provided with a plurality of second support blocks, each second support block is provided with a second slide rail, and each second swing rod is connected with a second slider. The second slider is slidably disposed on the corresponding second slide rail to provide support for the second swing rod.

[0015] In the aforementioned fixture, the support platform is further provided with a plurality of staggered first limiting blocks and second limiting blocks, the first limiting blocks and the second limiting blocks being located on the inner and outer sides of the workpiece respectively, for providing limiting for the workpiece.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] (1) A bidirectional swing adaptive internal support structure is adopted. The first and second lifting blocks drive the first and second swing rods to move in linkage. When the first and second swing rods are in contact with the inner wall of the workpiece, the swing amplitude can be flexibly matched according to the actual inner cavity contour of the workpiece. This flexible matching mechanism can accommodate the batch production tolerance and small dimensional deviation of the inner cavity of the workpiece, and always maintain a precise positioning reference and uniform and stable clamping force, effectively avoiding problems such as loosening, vibration and displacement of the workpiece during processing. At the same time, the traditional rigid clamping structure is abandoned, eliminating the stress concentration at the moment of contact, and fundamentally improving the elastic rebound and plastic deformation defects in the clamping and processing of thin-walled workpieces, significantly improving the finished product accuracy and batch processing consistency of the workpiece.

[0018] (2) The vertical linear motion of the first driving rod is driven by the first driving component, and the vertical linear motion of the second driving rod is driven by the second driving component. The vertical linear motion is then converted into a gradual arc swing motion of the first swing rod and the second swing rod, which transitions from tilting to straightening, through the first connecting rod, the second connecting rod, the third connecting rod, and the fourth connecting rod, respectively. The clamping process is smooth and gradual, without rigid impact, further ensuring that thin-walled workpieces are free from extrusion deformation and indentation. At the same time, the switchable upward and downward tilting initial posture design can adapt to the clamping of workpieces with deep and shallow cavities, multiple specifications of frame and shell types, greatly improving the versatility and flexible adaptability of the fixture, while taking into account the stability of precision clamping and machining accuracy.

[0019] (3) A first slider and a second slider are installed in the middle section of the first and second swing rods, and slide on the first and second slide rails fixed to the support platform. This structure transforms the swing rod, which was originally a cantilever beam force model, into a simply supported beam force model. During the entire clamping process of the first and second swing rods, the first and second sliders always follow the complex movement of the rods (both swinging and slight translation) and provide a dynamic, interference-free support point. This greatly enhances the structural stiffness of the swing rod and effectively suppresses its bending deformation when subjected to clamping reaction force. This ensures that the clamping force can be stably and without damage transmitted to the workpiece, guaranteeing the reliability of clamping and the accuracy of positioning. Especially for heavy workpieces or machining scenarios that require large clamping forces, this support structure is the key to achieving high-precision machining. Attached Figure Description

[0020] Figure 1 This is a 3D view of the proposed solution.

[0021] Figure 2 yes Figure 1 A 3D view of the hidden part of the structure.

[0022] Figure 3 yes Figure 2 A 3D view of the hidden part of the structure.

[0023] Figure 4 yes Figure 3 A 3D view of the hidden part of the structure.

[0024] Figure 5 yes Figure 4 A 3D view of the hidden part of the structure.

[0025] In the diagram, L represents the length direction; W represents the width direction; H represents the height direction; 100 is the support platform; 110 is the first fixed seat; 120 is the second fixed seat; 200 is the first lifting block; 210 is the first swing rod; 211 is the first slider; 220 is the first drive rod; 230 is the first connecting rod; 240 is the second connecting rod; 300 is the second lifting block; 310 is the second swing rod; 311 is the second slider; 320 is the second drive rod; 330 is the third connecting rod; 340 is the fourth connecting rod; 400 is the first driving component; 500 is the second driving component; 600 is the first support block; 610 is the first slide rail; 700 is the second support block; 710 is the second slide rail; 800 is the first limiting block; 900 is the second limiting block. Detailed Implementation

[0026] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings to further illustrate the technical solutions of the present invention. However, the present invention is not limited to these embodiments.

[0027] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0028] like Figures 1 to 5 As shown, this solution provides a fixture for fixing a workpiece, comprising: a support platform 100 having a length direction L and a width direction W; at least two first lifting blocks 200, spaced apart along the length direction L on the support platform 100; each of the first lifting blocks 200 having a first swing rod 210 connected to both sides thereof; the ends of the first swing rods 210 away from the first lifting blocks 200 respectively abutting against the opposite sidewalls of the workpiece extending along the length direction L, thereby fixing the workpiece in the width direction W; the first lifting blocks 200 relative to the support platform 100... When the platform 100 moves vertically, it drives the first swing rod 210 to swing. At least one second lifting block 300 is set on the support platform 100. The second lifting block 300 is connected to the second swing rod 310 on both sides. The ends of the second swing rods 310 on both sides away from the second lifting block 300 abut against the opposite sidewalls of the workpiece that extend in the width direction W, so as to fix the workpiece in the length direction L. When the second lifting block 300 moves vertically relative to the support platform 100, it drives the second swing rod 310 to swing.

[0029] During operation, in the initial state, the end of the first swing rod 210 connected to the first lifting block 200 can be preset to tilt upward or downward at an angle; similarly, the end of the second swing rod 310 connected to the second lifting block 300 is also in a corresponding preset tilt state.

[0030] After the workpiece is placed on the support platform 100, the first lifting block 200 and the second lifting block 300 rise or fall vertically relative to the support platform 100. Through the transmission of the connecting structure, they drive the first swing rod 210 and the second swing rod 310 to swing. During this process, as the first lifting block 200 and the second lifting block 300 continue to move, the first swing rod 210 and the second swing rod 310, which were originally in an inclined posture, gradually transition to a horizontal straight position. This continuous motion trajectory from inclination to straightness allows the ends of the first swing rod 210 and the second swing rod 310 to smoothly approach and conform to the inner wall of the workpiece, avoiding instantaneous local stress concentration caused by rigid impact on the workpiece.

[0031] At this time, the end of the first swing rod 210 away from the first lifting block 200 is in close contact with the inner wall of the workpiece extending along the length direction L, preventing the workpiece from shifting in the width direction W; simultaneously, the end of the second swing rod 310 away from the second lifting block 300 is in close contact with the inner wall of the workpiece extending along the width direction W, preventing the workpiece from shifting in the length direction L. The swing amplitude of the first swing rod 210 and the second swing rod 310 can be adaptively adjusted according to changes in the specific internal cavity dimensions of the workpiece.

[0032] In this design, the fixture utilizes the first lifting block 200 and the second lifting block 300 to drive the first swing rod 210 and the second swing rod 310 respectively. When the first swing rod 210 and the second swing rod 310 are in contact with the inner wall of the workpiece, they can achieve flexible contact with the swing amplitude according to the actual inner cavity contour of the workpiece. On the one hand, this adaptive flexible contact mechanism can accommodate the production tolerances and minor dimensional deviations of the workpiece's inner cavity dimensions, maintaining a precise positioning reference and a uniform and stable clamping force at all times. This effectively avoids problems such as clamping loosening, vibration, and displacement during workpiece processing, ensuring a stable and reliable processing process. On the other hand, this structure abandons the rigid clamping method of traditional fixtures, eliminating local stress concentration at the moment of contact, solving the problems of secondary elastic rebound and plastic extrusion deformation generated during the clamping and processing of thin-walled workpieces, and improving the dimensional accuracy and processing consistency of the finished workpiece.

[0033] Furthermore, the first lifting block 200 has a first mounting cavity, in which a first drive rod 220 and a first connecting rod 230 are assembled; a second connecting rod 240 is also transversely inserted through the side wall of the first lifting block 200; both ends of the first connecting rod 230 are respectively hinged to the first drive rod 220 and the second connecting rod 240; the end of the second connecting rod 240 facing away from the first connecting rod 230 is fixedly connected to the first swing rod 210.

[0034] The first connecting rod 230 and the first driving rod 220 are hinged by a clearance fit with a pin; this hinge can be replaced by a ball joint or a flexible hinge. The first connecting rod 230 and the second connecting rod 240 are hinged together by a first pin. The second connecting rod 240 and the first swing rod 210 can be connected by bolts. When the first driving rod 220 performs a vertical lifting linear motion, the first swing rod 210 can be driven to swing through the step-by-step hinged transmission of the first connecting rod 230 and the second connecting rod 240, thereby completing the retraction and expansion actions of the first swing rod 210.

[0035] Furthermore, the support platform 100 is also provided with a first driving component 400, and the first driving rod 220 is connected to the output end of the first driving component 400. The first driving component 400 is used to drive the first driving rod 220 to rise and fall.

[0036] This solution features two switchable initial postures and corresponding clamping conditions, making it adaptable to different clamping spaces and workpiece specifications, and highly versatile.

[0037] The first orientation is an upward tilt initial posture: In the initial state, the end connecting the first swing rod 210 and the second connecting rod 240 is preset to be tilted upward. At this time, the height of the hinge end of the first connecting rod 230 and the first driving rod 220 is higher than the height of the hinge end of the first connecting rod 230 and the second connecting rod 240. The entire connecting rod is arranged in a high-position tilt, and the outer abutment end of the first swing rod 210 is in a low-position retracted state, leaving sufficient space for workpiece placement. After the workpiece is stably placed in the preset position of the support platform 100, the first driving component 400 is activated, driving the first driving rod 220 to move vertically downward, pulling the first connecting rod 230 and the second connecting rod 240 downward synchronously and deflecting the angle, thereby driving the inner hinge end of the first swing rod 210 to swing downward. Relying on the lever swing principle, the outer abutment end of the first swing rod 210 smoothly opens outward and upward, gradually adhering to and pressing against the inner sidewalls of both sides extending along the length direction L of the workpiece, and finally completely adhering to the inner wall of the workpiece, reliably limiting the displacement and swaying of the workpiece in the width direction W.

[0038] The second type is the downward tilt initial posture: In the initial state, the end connecting the first swing rod 210 and the second connecting rod 240 is preset to be tilted downwards. The first connecting rod 230 is tilted synchronously with the posture, and the outer abutment end of the first swing rod 210 also remains in a retracted state. After the workpiece is placed, the first driving component 400 starts in reverse, driving the first driving rod 220 to rise vertically upwards, pushing the first connecting rod 230 and the second connecting rod 240 to deflect upwards, driving the inner hinge end of the first swing rod 210 to swing upwards, so that the outer abutment end of the first swing rod 210 is smoothly opened outwards, and finally abuts against the inner wall of the workpiece, completing the positioning and clamping in the width direction W.

[0039] In both of the above working conditions, the swing amplitude of the first swing rod 210 has a flexible fitting characteristic, which can accurately match the actual size of the inner wall of the workpiece: when the workpiece width is small, the required opening stroke is smaller, and the swing amplitude of the first swing rod 210 is reduced accordingly, which can avoid excessive tension causing workpiece compression deformation; when the workpiece width is large, the first drive rod 220 increases the lifting stroke accordingly, and the first swing rod 210 simultaneously increases the swing amplitude, fully opening and fitting the inner wall of the workpiece, ensuring that the clamping is in place and the positioning is reliable. Relying on the flexible transmission characteristics of the connecting rod hinge, this structure can adapt to the normal tolerance fluctuation of the inner cavity size of the same batch of workpieces, without the need for manual fine-tuning of the fixture or replacement of fixture accessories.

[0040] This structure is configured with two initial assembly postures: upward tilt and downward tilt. The drive and swing modes can be flexibly switched according to the depth of the workpiece cavity, the installation space and the size of the specifications. It is suitable for clamping scenarios of various frame-shaped, shell-shaped and cylindrical workpieces such as shallow cavity and deep cavity. It has strong versatility and can effectively reduce the tooling development and manufacturing costs.

[0041] The multi-hinged linkage transmission mechanism, consisting of the first drive rod 220, the first connecting rod 230, the first shaft pin, and the second connecting rod 240, can transform vertical linear drive into smooth, gradual circular oscillation. The clamping process is stable, without jamming or rigid impact. This structure eliminates stress concentration on the inner wall of the workpiece at its source, avoids deformation defects such as dents, bulges, and springback that occur when clamping thin-walled workpieces, and significantly improves the machining accuracy of precision workpieces.

[0042] Based on the stroke linkage characteristics of the first connecting rod 230 and the second connecting rod 240, the opening range of the first swing rod 210 can be precisely adjusted with the lifting stroke of the first drive rod 220. It can adapt to the normal production tolerance of the inner cavity size of the workpiece and can also achieve precise clamping for workpieces with small dimensional deviations. There is no need to adjust the machine or replace parts, which effectively improves the consistency and production efficiency of batch clamping and reduces the product defect rate.

[0043] Furthermore, the second lifting block 300 has a second mounting cavity, in which a second drive rod 320 and a third connecting rod 330 are assembled; a fourth connecting rod 340 is also transversely inserted through the side wall of the second lifting block 300; both ends of the third connecting rod 330 are hinged to the second drive rod 320 and the fourth connecting rod 340 respectively; one end of the fourth connecting rod 340 away from the third connecting rod 330 is fixedly connected to the second swing rod 310.

[0044] The third connecting rod 330 and the second driving rod 320 are hinged by a clearance fit with a pin; this hinge can be replaced by a ball joint or a flexible hinge. The third connecting rod 330 and the fourth connecting rod 340 are hinged together by a second pin. The fourth connecting rod 340 and the second swing rod 310 are connected by bolts. When the second driving rod 320 performs vertical lifting linear motion, the second swing rod 310 is driven to swing through the step-by-step hinged transmission of the third connecting rod 330 and the fourth connecting rod 340, thereby completing the retraction and expansion actions of the second swing rod 310.

[0045] Furthermore, the support platform 100 is also equipped with a second driving component 500. The second driving rod 320 is connected to the output end of the second driving component 500. The two are preferably fixed with bolts, but can also be connected by welding or integral molding. The second driving component 500 is used to drive the second driving rod 320 to rise and fall. The second driving component 500 can be a motor, hydraulic cylinder, or pneumatic cylinder.

[0046] Consistent with the mechanism principles of the first driving component 400, first driving rod 220, first connecting rod 230, second connecting rod 240, and first swing rod 210, the second driving component 500, second driving rod 320, third connecting rod 330, fourth connecting rod 340, and second swing rod 310 also possess two switchable initial assembly postures for adaptive positioning and clamping of the workpiece in the length direction L. In the initial state, the second swing rod 310 can be preset to an upward or downward tilting retracted posture, reserving space for workpiece installation. After the workpiece is in place, the second driving rod 320 is controlled to descend or rise according to the preset posture. Through the hinged transmission of the third connecting rod 330 and fourth connecting rod 340, the second swing rod 310 is driven to swing smoothly and gradually expand outwards, so that the end of the second swing rod 310 closely adheres to the inner wall of the workpiece extending along the width direction W, achieving limiting and fixing of the workpiece in the length direction L, effectively restricting the displacement and swaying of the workpiece in the length direction L.

[0047] The swing amplitude of the second swing rod 310 can flexibly match the lifting stroke of the second drive rod 320. It can automatically match the opening stroke according to the actual length L of the workpiece and the inner cavity size, adapt to the small tolerance fluctuation of the inner cavity size of the workpiece, and ensure that workpieces of different specifications can be accurately clamped and clamped, eliminating the problems of loose clamping or excessive clamping and deformation.

[0048] A first fixed seat 110 is also provided on the support platform 100. The first fixed seat 110 has a hollow structure. The first driving component 400 is located inside the first fixed seat 110, and the hollow inner cavity of the first fixed seat 110 forms a first guide hole. One end of the first lifting block 200 is slidably inserted into the first guide hole. When the first driving rod 220 is running, it can drive the second connecting rod 240 to move through the connecting rod assembly. At the same time, because the second connecting rod 240 is inserted and limited on the first lifting block 200, it drives the first lifting block 200 to move synchronously and follow the lifting, so that the first lifting block 200 makes directional lifting and lowering motion along the first guide hole, effectively constraining the overall transmission trajectory and ensuring the guiding accuracy and motion stability of the transmission process.

[0049] A second fixed seat 120 is also provided on the support platform 100. The second fixed seat 120 is also a hollow structure. The second driving component 500 is located inside the second fixed seat 120, and the hollow inner cavity of the second fixed seat 120 forms a second guide hole. One end of the second lifting block 300 is slidably inserted into the second guide hole. When the second driving rod 320 is running, it can drive the fourth connecting rod 340 to move through the connecting rod assembly. At the same time, because the fourth connecting rod 340 is fitted and limited on the second lifting block 300, it drives the second lifting block 300 to move synchronously and follow the lifting, so that the second lifting block 300 makes directional lifting and lowering motion along the second guide hole, effectively constraining the overall transmission trajectory and ensuring the guiding accuracy and motion stability of the transmission process.

[0050] Furthermore, the support platform 100 is also provided with a plurality of first support blocks 600, each of which is fixedly equipped with a first slide rail 610, and each first swing rod 210 is correspondingly equipped with a first slider 211. The first slider 211 is slidably installed on the corresponding first slide rail 610 to provide dynamic support for the first swing rod 210.

[0051] In terms of specific assembly layout, the first support block 600 is correspondingly arranged on the body of the first swing rod 210, providing support for the cantilevered first swing rod 210 and effectively improving the cantilever stress state of the rod. When the first swing rod 210 is working, it performs an arc-shaped swing motion, with horizontal slippage and slight height changes in the rod body. Therefore, the first swing rod 210 and the first slider 211 are connected by equal-height bolts for floating connection. The gap between the equal-height bolts and the rod body adapts to the angular deviation and slight height displacement during the swing of the first swing rod 210. Throughout the entire process of the first swing rod 210 swinging open or retracting, the first slider 211 can adaptively slide along the first slide rail 610 following the changes in the rod's posture, maintaining stable support for the first swing rod 210 throughout the entire process, without interfering with the normal swing trajectory of the swing rod, ensuring smooth and unobstructed clamping action.

[0052] Relying on the low-friction sliding cooperation between the first slide rail 610 and the first slider 211, the support structure can adjust its support position in real time according to the posture of the first swing rod 210, conforming to the movement trajectory of the rod throughout the entire process. Compared with a fixed support structure, it can completely eliminate motion interference forces, making the opening and closing movements of the first swing rod 210 smoother, further improving the stability of the clamping process, and preventing workpiece positioning deviation caused by instantaneous vibration.

[0053] Furthermore, the support platform 100 is also provided with a plurality of second support blocks 700, each second support block 700 is fixedly installed with a second slide rail 710, and each second swing rod 310 is correspondingly equipped with a second slider 311. The second slider 311 slides in cooperation with the corresponding second slide rail 710 to provide full-range dynamic support for the second swing rod 310.

[0054] The second support block 700 is arranged on the body of the second swing rod 310, improving the cantilever stress disadvantage of the hinged root of the second swing rod 310. The second swing rod 310 and the second slider 311 are also connected by equal-height bolts to accommodate the angle changes and slight height displacements during its arc swing. During the opening and closing of the second swing rod 310, the second slider 311 can adaptively slide along the second slide rail 710 according to the changes in the posture of the rod, dynamically fitting and supporting it throughout the entire process without interfering with the swing action, ensuring a smooth and stable clamping process in the length direction L.

[0055] Furthermore, the support platform 100 is also equipped with multiple sets of staggered first limiting blocks 800 and second limiting blocks 900, which are respectively arranged on the inner and outer sides of the workpiece sidewall, forming a bidirectional limiting constraint on the workpiece, which is used to realize the pre-positioning of the workpiece before assembly and improve the workpiece clamping accuracy and placement stability.

[0056] It should be noted that in this invention, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. The terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two elements or the interaction between two elements, unless otherwise explicitly specified. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0057] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0058] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A clamp for fixing a workpiece, characterized in that, include: A support platform, which has both length and width directions; At least two first lifting blocks are spaced apart on the support platform along the length direction. Each of the first lifting blocks is connected to a first swing rod on both sides. The ends of the first swing rods on both sides away from the first lifting blocks abut against the opposite sidewalls of the workpiece that extend along the length direction, so as to fix the workpiece in the width direction. The movement of the first lifting blocks relative to the support platform in the vertical direction causes the first swing rods to swing. At least one second lifting block is disposed on the support platform. A second swing rod is connected to both sides of the second lifting block. The ends of the second swing rods on both sides away from the second lifting block abut against the opposite sidewalls of the workpiece extending along the width direction, so as to fix the workpiece in the length direction. The movement of the second lifting block relative to the support platform in the vertical direction drives the second swing rods to swing. The first lifting block has a first mounting cavity, in which a first driving rod and a first connecting rod are disposed. A second connecting rod is also provided through the side wall of the first lifting block. The two ends of the first connecting rod are respectively hinged to the first driving rod and the second connecting rod. The end of the second connecting rod opposite to the first connecting rod is fixedly connected to the first swing rod. The support platform is also provided with a plurality of first support blocks, each first support block is provided with a first slide rail, and each first swing rod is connected with a first slider. The first slider is slidably disposed on the corresponding first slide rail to provide support for the first swing rod. The first swing arm is floatingly connected to the first slider.

2. The clamp as described in claim 1, characterized in that, The support platform is also provided with a first driving component, and the first driving rod is connected to the output end of the first driving component. The first driving component is used to drive the first driving rod to rise and fall.

3. The clamp as described in claim 1, characterized in that, The second lifting block has a second mounting cavity, in which a second driving rod and a third connecting rod are disposed. A fourth connecting rod is also provided through the side wall of the second lifting block. The two ends of the third connecting rod are respectively hinged to the second driving rod and the fourth connecting rod. The end of the fourth connecting rod opposite to the third connecting rod is fixedly connected to the second swing rod.

4. The clamp as described in claim 3, characterized in that, The support platform is also provided with a second driving component, and the second driving rod is connected to the output end of the second driving component. The second driving component is used to drive the second driving rod to rise and fall.

5. The clamp as described in claim 2, characterized in that, The support platform is also provided with a first fixed seat. The first fixed seat is a hollow structure and has a first guide hole inside. The first driving member is located inside the first fixed seat, and one end of the first lifting block is slidably inserted into the first guide hole.

6. The clamp as described in claim 4, characterized in that, The support platform is also provided with a second fixed seat. The second fixed seat is a hollow structure and has a second guide hole inside. The second driving component is located inside the second fixed seat, and one end of the second lifting block is slidably inserted into the second guide hole.

7. The clamp as described in claim 1, characterized in that, The support platform is also provided with a plurality of second support blocks, each second support block is provided with a second slide rail, and each second swing rod is connected with a second slider. The second slider is slidably disposed on the corresponding second slide rail to provide support for the second swing rod.

8. The clamp as described in claim 1, characterized in that, The support platform is also provided with a plurality of staggered first limiting blocks and second limiting blocks, which are located on the inner and outer sides of the workpiece, respectively, to provide limiting for the workpiece.

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