A pressure plate type clamp

Abstract

This utility model relates to a pressure plate type fixture, including a placement table for placing a workpiece; at least one pressure plate mechanism disposed on one side of the placement table, the pressure plate mechanism being configured to be positioned in a first position in a first direction to press the workpiece; a power mechanism connected to the pressure plate mechanism; at least one fixing block fixed to the placement table, the fixing block being located on the first side of the workpiece; and a pusher being disposed on the opposite second side of the workpiece; wherein the fixing block and the pusher are respectively positioned in a second and third position in a second direction within the plane of the workpiece to abut against the opposite sides of the workpiece. The pressure plate mechanism presses the workpiece downwards onto the placement table, achieving vertical positioning; the fixing block and the pusher abut against the opposite sides of the workpiece in the horizontal plane, achieving horizontal positioning. This results in good fixing accuracy for the fixture, and the pressing force of the pressure plate mechanism can be uniformly controlled and adjusted to prevent workpiece deformation during processing.

Description

Technical Field

[0001] This utility model relates to the field of machining technology, and in particular to a pressure plate type clamp. Background Technology

[0002] When fixing a workpiece, a conventional pressure plate fixture requires manual placement, alignment, and tightening of multiple bolts and pressure plates each time it is clamped. The positioning accuracy and repeatability are relatively low, and the clamping force of the pressure plate is not easy to control, which can easily lead to workpiece deformation or indentation.

[0003] Therefore, it is necessary to design a better pressure plate clamp to solve the above problems. Utility Model Content

[0004] This utility model provides a pressure plate type clamp to solve at least one of the above-mentioned technical problems. The pressure plate type clamp of this utility model has high positioning accuracy, uniform control of clamping force, strong versatility, can achieve rapid positioning, and high clamping efficiency.

[0005] This utility model provides a pressure plate type clamp, including:

[0006] A placement platform, used to place workpieces;

[0007] At least one pressure plate mechanism is disposed on one side of the placement table, the pressure plate mechanism being configured to be located in a first position in a first direction to press the workpiece;

[0008] A power mechanism is connected to the pressure plate mechanism, and the power mechanism is configured to drive the pressure plate mechanism to press or release the workpiece.

[0009] At least one fixing block is fixed to the placement platform, and the fixing block is located on the first side of the workpiece;

[0010] A pusher is disposed on the second side opposite to the workpiece;

[0011] The fixing block and the pushing member are respectively located in a second position and a third position in a second direction within the plane of the workpiece to abut against the opposite sides of the workpiece.

[0012] The workpiece is pressed down onto the placement table by the pressure plate mechanism, achieving vertical positioning. The fixed block and the pusher support the opposite sides of the workpiece in the horizontal plane, achieving horizontal positioning. This gives the fixture good fixing accuracy. The pressure plate mechanism, driven by the power mechanism, presses the workpiece, and the pressing force can be uniformly adjusted to prevent workpiece deformation during processing and ensure processing stability. The fixed block is set up, and during clamping, the pusher pushes the workpiece towards the fixed block, so that the workpiece fits tightly against the fixed block. Then, the pressure plate mechanism is used to press the workpiece, which can quickly complete the positioning and improve clamping efficiency.

[0013] In one embodiment, the pusher includes:

[0014] A base, one end of which is provided with a first hinge portion, and the other end of which is provided with a sleeve;

[0015] An operating lever, which is hinged to the first hinge portion;

[0016] A push rod is inserted through the sleeve, with one end of the push rod hinged to the operating rod and the other end pushing against the side wall of the workpiece.

[0017] In this embodiment, when the operating lever is lifted upwards or pressed downwards, the operating lever rotates around the end of the base, causing the push rod to move back and forth within the sleeve, thereby pressing or releasing the workpiece from its side. Under the constraint of the sleeve, the push rod can only move back and forth within the plane of the workpiece, ensuring that the pushing direction of the push rod is straight. By using a pushing component to press the workpiece towards the fixed block, the workpiece is positioned in the horizontal plane, resulting in high workpiece positioning accuracy.

[0018] In one embodiment, a crank is provided between the push rod and the operating lever, one end of the crank being hinged to the end of the push rod and the other end being hinged to the operating lever.

[0019] In this embodiment, the two ends of the crank are hinged to the operating lever and the push rod respectively, so that the operating lever can control the push rod more smoothly when it is operated.

[0020] In one embodiment, the push rod has a thread at one end facing the workpiece, and a nut is screwed into the thread, with the end face of the nut pressing against the side wall of the workpiece.

[0021] In this embodiment, a nut is screwed to the end of the push rod. On the one hand, the end face area of ​​the nut is larger than that of the push rod, so that the nut has a larger contact area with the side wall of the workpiece, ensuring the stability of the push. On the other hand, the push pressure can be adjusted by the nut. When the operating rod is operated to push the nut at the front end of the push rod against the side wall of the workpiece, the push pressure is relatively large. Then, the adjusting nut is rotated to adjust the position of the nut on the thread. This can ensure that the push part is against the workpiece, while reducing the push pressure and avoiding damage to the workpiece due to excessive pressure.

[0022] In one embodiment, the base has a heightening block at its bottom.

[0023] In this embodiment, the height of the pusher can be adjusted by the height increase block. When the fixture clamps different workpieces or products, different heights can be adjusted. When processing sheet workpieces of different thicknesses, the height increase block can be replaced to freely adjust the clamping position of the pusher. This ensures clamping and is applicable to different products, making it highly versatile.

[0024] In one embodiment, two fixing blocks are provided, located at the two corners of the first side of the workpiece, and the pushing member is located in the middle of the second side of the workpiece.

[0025] In this embodiment, the two fixing blocks and the pusher form a triangular positioning, which ensures the stability of the workpiece positioning.

[0026] In one embodiment, the fixing block has an arc-shaped chamfer on its outer periphery, which cooperates with a recess on the workpiece to position the workpiece.

[0027] In this embodiment, by combining the arc-shaped chamfer and the arc-shaped concave portion, when the pusher presses the workpiece against the fixed block in the horizontal plane, the workpiece is restricted and positioned in four degrees of freedom in the horizontal direction. At the same time, the arc-shaped surface helps to avoid damage to the workpiece.

[0028] In one embodiment, multiple pressure plate mechanisms are provided and distributed around the placement platform, and the multiple pressure plate mechanisms are connected to one or more of the power mechanisms.

[0029] In this embodiment, by setting multiple pressure plate mechanisms around the placement platform, the load can be effectively distributed and the workpiece can be positioned at multiple locations, reducing the vibration and shaking of the workpiece and improving processing stability. The multiple pressure plate mechanisms can be driven by one power mechanism or by multiple power mechanisms respectively. The clamping force of the pressure plate mechanisms can be controlled by the power mechanism, so that the clamping force can be uniformly adjusted to avoid deformation of the workpiece during processing.

[0030] In one embodiment, the pressure plate mechanism includes:

[0031] A pressure plate, one end of which is connected to the power mechanism; and

[0032] A lever, which is hinged to the middle of the pressure plate.

[0033] In this embodiment, a power mechanism is used to control the clamping force of the pressure plate, avoiding excessive pressure that could damage the workpiece, cause indentations, or deform the workpiece. The clamping force is consistent each time, ensuring processing stability. Different operators can also quickly position and fix the workpiece at once. The fixture is lightweight, and the hydraulic cylinder clamps quickly during the clamping process, resulting in high clamping efficiency. When performing batch processing, the time consumed is shorter. The workpiece remains stable during processing and is not prone to shaking. Continuous processing ensures stable dimensions with the dimensional range within acceptable limits.

[0034] In one embodiment, the power mechanism includes one of a hydraulic cylinder, an electric motor, or a pneumatic cylinder.

[0035] In this embodiment, the power mechanism can be a hydraulic cylinder, a motor, or a pneumatic cylinder. By controlling the driving force of the hydraulic cylinder, motor, or pneumatic cylinder, the clamping force of the pressure plate mechanism can be controlled, thereby achieving uniform adjustment of the clamping force on the workpiece, avoiding deformation of the workpiece during processing, and through the control of the power mechanism, rapid clamping can be achieved, resulting in high clamping efficiency.

[0036] Compared with the prior art, the advantages of this utility model are that the pressure plate mechanism presses the workpiece down onto the placement table to achieve vertical positioning, and the fixing block and the pusher support the opposite sides of the workpiece in the horizontal plane to achieve horizontal positioning. This makes the fixture have better fixing accuracy. Moreover, under the drive of the power mechanism, the clamping force of the pressure plate mechanism can be uniformly controlled and adjusted to avoid deformation of the workpiece during processing. When clamping, the pusher pushes the workpiece toward the fixing block, so that the workpiece is tightly attached to the fixing block. Then, the pressure plate mechanism is used to clamp the workpiece, which can quickly complete the positioning and improve the clamping efficiency. Attached Figure Description

[0037] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings.

[0038] Figure 1 This is a three-dimensional structural diagram of the pressure plate type clamp of this utility model;

[0039] Figure 2 yes Figure 1 A magnified view of a section at point A in the middle;

[0040] Figure 3 yes Figure 1 A magnified view of a section at point B in the middle;

[0041] Figure 4 yes Figure 1 Top view;

[0042] Figure 5 yes Figure 1 Side view;

[0043] Figure 6 yes Figure 1 Front view;

[0044] Figure label:

[0045] 1. Base plate; 2. Placement platform; 3. Workpiece; 31. Recess; 4. Pressure plate mechanism; 41. Hydraulic cylinder; 42. Pressure plate; 43. Lever; 44. Elevating block; 5. Fixing block; 51. Chamfered corner; 6. Pushing component; 61. Base; 611. First hinge; 612. Sleeve; 62. Operating lever; 621. Second hinge; 622. Third hinge; 623. Silicone sleeve; 63. Crank; 631. Fourth hinge; 632. Fifth hinge; 64. Push rod; 641. Thread; 65. Nut; 66. Elevating block. Detailed Implementation

[0046] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0047] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment 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 indicator will also change accordingly.

[0048] Furthermore, the use of terms such as "first" and "second" in this utility model 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. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0049] like Figure 1 As shown, this utility model provides a pressure plate type clamp, including a placement platform 2, a pressure plate mechanism 4, a power mechanism, a fixing block 5, and a pushing member 6. The pressure plate type clamp of this invention uses the pressure plate mechanism 4, driven by the power mechanism, to press the workpiece downwards onto the placement platform, achieving vertical positioning. The fixing block 5 and the pushing member 6 respectively abut against opposite sides of the workpiece in the horizontal plane, achieving horizontal positioning, thus achieving good fixing accuracy.

[0050] Specifically, the placement platform 2 is used to place the workpiece 3, and the placement platform 2 is fixed to the base plate 1. At least one pressure plate mechanism 4 is disposed on one side of the placement platform 2, and the pressure plate mechanism 4 is configured to press the workpiece 3 in a first position in a first direction (vertical direction). A power mechanism is connected to the pressure plate mechanism 4, and the power mechanism 4 is configured to drive the pressure plate mechanism 4 to press or release the workpiece 3. At least one fixing block 5 is fixed to the placement platform 2, and the fixing block 5 is located on the first side of the workpiece 3. A pusher 6 is disposed on the opposite second side of the workpiece 3, wherein the fixing block 5 and the pusher 6 are respectively located in a second position (front-back direction or left-right direction) in a second direction to abut against the opposite sides of the workpiece 3 within the plane containing the workpiece 3.

[0051] The workpiece 3 is pressed downwards onto the placement table 2 by the pressure plate mechanism 4, achieving vertical positioning. The workpiece 3 is positioned horizontally by the fixing block 5 and the pusher 6 supporting it on opposite sides of the horizontal plane. This ensures good fixing accuracy of the fixture. The pressure plate mechanism 4, through a power mechanism, adjusts the pressure, ensuring uniform and easily controllable clamping force, preventing deformation of the workpiece 3 during processing. The fixing block 5 is used; during clamping, the pusher 6 pushes the workpiece 3 towards the fixing block 5, ensuring a tight fit between the workpiece 3 and the fixing block 5. The pressure plate mechanism 4 then clamps the workpiece, quickly completing the positioning and improving clamping efficiency. Different operators can quickly position and fix the workpiece 3 in one go. The fixture is lightweight, and the power mechanism enables rapid clamping during clamping, reducing processing time in batches. The workpiece 3 remains stable during processing, preventing shaking and ensuring continuous processing with consistent dimensions within acceptable ranges, avoiding product scrap due to clamping issues.

[0052] Example 1

[0053] like Figures 1 to 4 As shown, the pressure plate type fixture includes a fixing block 5 and a pushing member 6. The fixing block 5 is located on the first side of the workpiece 3, and the pushing member 6 is located on the second side of the workpiece 3. During clamping, the side wall of the first side of the workpiece 3 is placed against the fixing block 5, and then the pushing member 6 is operated to push against the side wall of the second side of the workpiece 3, so that the workpiece 3 is clamped between the fixing block 5 and the pushing member 6 in the horizontal plane, achieving horizontal positioning. A pressure plate mechanism 4 is also provided on the side of the fixture. The pressure plate mechanism 4 is driven by a power mechanism and presses against the top surface of the workpiece 3, pressing the workpiece 3 downward and making it adhere to the placement table 2. In this way, the six degrees of freedom of the workpiece 3 in the vertical direction and in the horizontal plane are all restricted, achieving complete positioning and ensuring good positioning accuracy.

[0054] The pusher 6 includes a base 61, an operating lever 62, and a push rod 64. The bottom of the base 61 is directly or indirectly fixed to the base plate 1. One end of the base 61 is provided with a first hinge portion 611, and the other end is provided with a sleeve 612. In this embodiment, the end of the base 61 away from the workpiece 3 is provided with the first hinge portion 611, and one end of the operating lever 62 is hinged to the first hinge portion 611. In this embodiment, one end of the operating lever 62 is provided with a second hinge portion 621, which is hinged to the first hinge portion 611. Specifically, the first hinge portion 611 and the second hinge portion 621 are fitted with a shaft and a hole, allowing the operating lever 62 to rotate relative to the base 61. The other end of the operating lever 62 is a free end, which is the part operated by hand. A silicone sleeve 623 can be optionally fitted on the free end to make it more comfortable for the hand to hold or push the operating lever 62. The operating lever 62 has a bent portion near the first hinge portion 611, and a third hinge portion 622 is provided at the bent portion to connect the crank 63 or the push rod 64.

[0055] like Figures 3 to 5 As shown, the push rod 64 passes through the sleeve 612. One end of the push rod 64 is directly or indirectly hinged to the operating rod 62, and the other end pushes against the side wall of the workpiece 3. In this embodiment, a crank 63 is provided between the push rod 64 and the operating rod 62. The two ends of the crank 63 are respectively provided with a fourth hinge portion 631 and a fifth hinge portion 632. The fourth hinge portion 631 is hinged to the third hinge portion 622 on the operating rod 62, and the fifth hinge portion 632 is hinged to the end of the push rod 64. Therefore, when the operating rod 62 is lifted upward or pressed downward, the operating rod 62 rotates around the end of the base 61, driving the crank 63 to rotate. The crank 63 drives the push rod 64 to move back and forth within the sleeve 612, thereby pressing or releasing the workpiece 3. Under the restriction of the sleeve 612, the push rod 64 can only move back and forth within the plane of the workpiece 3, ensuring that the pushing direction of the push rod 64 is straight.

[0056] In another embodiment, the crank 63 may be omitted, and the end of the push rod 64 is hinged to the third hinge portion 622 of the operating lever 62 through a connecting portion. When the operating lever 62 rotates, it drives the push rod 64 to move back and forth.

[0057] In one embodiment, the end of the push rod 64 facing the workpiece 3 is provided with a thread 641, and a nut 65 is screwed onto the thread 641. Preferably, the end of the push rod 64 does not pass through the nut 65, so that the end face of the nut 65 pushes against the side wall of the workpiece 3. On the one hand, the end face area of ​​the nut 65 is larger than the end face area of ​​the push rod 64, so that the nut 65 has a larger contact area with the side wall of the workpiece 3, ensuring the stability of the push. On the other hand, the push pressure can be adjusted by the nut 65. When the operating rod 62 is operated to push the nut 65 at the front end of the push rod 64 against the side wall of the workpiece 3, the push pressure is relatively large. Then, by rotating the adjusting nut 65, the position of the nut 65 on the thread 641 can be adjusted, which can ensure that the push member 6 abuts against the workpiece 3, and reduce the push pressure to avoid damage to the workpiece 3 due to excessive pressure.

[0058] In one embodiment, the base 61 has a heightening block 66 at its bottom. The height of the pusher 6 can be adjusted via the heightening block 66. When clamping different workpieces 3 or products, different heights can be adjusted. When processing sheet-like workpieces 3 of different thicknesses, the heightening block 66 can be replaced to freely adjust the clamping position of the pusher 6, ensuring both clamping tightness and applicability to different products, thus exhibiting high versatility. In this embodiment, the bottom of the heightening block 66 is detachably mounted on the base plate 1, and the bottom of the base 61 is detachably mounted on the top of the heightening block 66, thus facilitating the replacement of the heightening block 66.

[0059] like Figure 4 As shown, in one embodiment, there are two fixing blocks 5, which are located at the two corners of the first side of the workpiece 3 respectively, and the pusher 6 is located in the middle of the second side of the workpiece 3. Therefore, the two fixing blocks 5 and the pusher 6 form a triangular positioning, which ensures the stability of the positioning of the workpiece 3.

[0060] In one embodiment, an L-shaped step is provided at the corner of the workpiece 3, and the two sides of the step abut against the two sides of the fixing block 5. Therefore, when the pusher 6 presses the workpiece 3 against the fixing block 5 in the horizontal plane, the workpiece 3 is restricted and positioned in four degrees of freedom in the horizontal direction.

[0061] like Figure 2 As shown, preferably, the outer periphery of the fixing block 5 is provided with an arc-shaped chamfer 51, and the two end corners of the workpiece 3 are provided with recesses 31. The arc-shaped chamfer 51 and the recesses 31 cooperate to achieve the positioning of the workpiece 3. Through the cooperation of the arc-shaped chamfer 51 and the arc-shaped recesses 31, when the pusher 6 presses the workpiece 3 against the fixing block 5 in the horizontal plane, the workpiece 3 is restricted and positioned in four degrees of freedom in the horizontal direction. At the same time, the arc-shaped surfaces cooperate to avoid damage to the workpiece 3.

[0062] In one embodiment, the fixing block 5 is made of wear-resistant material. After being processed separately, the fixing block 5 is installed on the placement table 2, so the position of the fixing block 5 can also be adjusted according to the position of the workpiece 3. For workpiece 3 without the recess 31, the fixing block 5 can also be positioned by abutting against the side wall of the second side of the workpiece 3.

[0063] Example 2

[0064] like Figures 1 to 4 As shown, the pressure plate type fixture includes a fixing block 5 and a pushing member 6. The fixing block 5 is located on the first side of the workpiece 3, and the pushing member 6 is located on the second side of the workpiece 3. During clamping, the side wall of the first side of the workpiece 3 is placed against the fixing block 5, and then the pushing member 6 is operated to push against the side wall of the second side of the workpiece 3, so that the workpiece 3 is clamped between the fixing block 5 and the pushing member 6 in the horizontal plane, achieving horizontal positioning. A pressure plate mechanism 4 is also provided on the side of the fixture. The pressure plate mechanism 4 is driven by a power mechanism and presses against the top surface of the workpiece 3, pressing the workpiece 3 downward and making it adhere to the placement table 2. In this way, the six degrees of freedom of the workpiece 3 in the vertical direction and in the horizontal plane are all restricted, achieving complete positioning and ensuring good positioning accuracy.

[0065] The pusher 6 includes a base 61, an operating lever 62, and a push rod 64. The bottom of the base 61 is directly or indirectly fixed to the base plate 1. One end of the base 61 is provided with a first hinge portion 611, and the other end is provided with a sleeve 612. In this embodiment, the end of the base 61 away from the workpiece 3 is provided with the first hinge portion 611, and one end of the operating lever 62 is hinged to the first hinge portion 611. In this embodiment, one end of the operating lever 62 is provided with a second hinge portion 621, which is hinged to the first hinge portion 611. Specifically, the first hinge portion 611 and the second hinge portion 621 are fitted with a shaft and a hole, allowing the operating lever 62 to rotate relative to the base 61. The other end of the operating lever 62 is a free end, which is the part operated by hand. A silicone sleeve 623 can be optionally fitted on the free end to make it more comfortable for the hand to hold or push the operating lever 62. The operating lever 62 has a bent portion near the first hinge portion 611, and a third hinge portion 622 is provided at the bent portion to connect the crank 63 or the push rod 64.

[0066] like Figures 3 to 5As shown, the push rod 64 passes through the sleeve 612. One end of the push rod 64 is directly or indirectly hinged to the operating rod 62, and the other end pushes against the side wall of the workpiece 3. In this embodiment, a crank 63 is provided between the push rod 64 and the operating rod 62. The two ends of the crank 63 are respectively provided with a fourth hinge portion 631 and a fifth hinge portion 632. The fourth hinge portion 631 is hinged to the third hinge portion 622 on the operating rod 62, and the fifth hinge portion 632 is hinged to the end of the push rod 64. Therefore, when the operating rod 62 is lifted upward or pressed downward, the operating rod 62 rotates around the end of the base 61, driving the crank 63 to rotate. The crank 63 drives the push rod 64 to move back and forth within the sleeve 612, thereby pressing or releasing the workpiece 3. Under the restriction of the sleeve 612, the push rod 64 can only move back and forth within the plane of the workpiece 3, ensuring that the pushing direction of the push rod 64 is straight.

[0067] In another embodiment, the crank 63 may be omitted, and the end of the push rod 64 is hinged to the third hinge portion 622 of the operating lever 62 through a connecting portion. When the operating lever 62 rotates, it drives the push rod 64 to move back and forth.

[0068] In one embodiment, the end of the push rod 64 facing the workpiece 3 is provided with a thread 641, and a nut 65 is screwed onto the thread 641. Preferably, the end of the push rod 64 does not pass through the nut 65, so that the end face of the nut 65 pushes against the side wall of the workpiece 3. On the one hand, the end face area of ​​the nut 65 is larger than the end face area of ​​the push rod 64, so that the nut 65 has a larger contact area with the side wall of the workpiece 3, ensuring the stability of the push. On the other hand, the push pressure can be adjusted by the nut 65. When the operating rod 62 is operated to push the nut 65 at the front end of the push rod 64 against the side wall of the workpiece 3, the push pressure is relatively large. Then, by rotating the adjusting nut 65, the position of the nut 65 on the thread 641 can be adjusted, which can ensure that the push member 6 abuts against the workpiece 3, and reduce the push pressure to avoid damage to the workpiece 3 due to excessive pressure.

[0069] In one embodiment, the base 61 has a heightening block 66 at its bottom. The height of the pusher 6 can be adjusted via the heightening block 66. When clamping different workpieces 3 or products, different heights can be adjusted. When processing sheet-like workpieces 3 of different thicknesses, the heightening block 66 can be replaced to freely adjust the clamping position of the pusher 6, ensuring both clamping tightness and applicability to different products, thus exhibiting high versatility. In this embodiment, the bottom of the heightening block 66 is detachably mounted on the base plate 1, and the bottom of the base 61 is detachably mounted on the top of the heightening block 66, thus facilitating the replacement of the heightening block 66.

[0070] like Figure 4As shown, in one embodiment, there are two fixing blocks 5, which are located at the two corners of the first side of the workpiece 3 respectively, and the pusher 6 is located in the middle of the second side of the workpiece 3. Therefore, the two fixing blocks 5 and the pusher 6 form a triangular positioning, which ensures the stability of the positioning of the workpiece 3.

[0071] In one embodiment, an L-shaped step is provided at the corner of the workpiece 3, and the two sides of the step abut against the two sides of the fixing block 5. Therefore, when the pusher 6 presses the workpiece 3 against the fixing block 5 in the horizontal plane, the workpiece 3 is restricted and positioned in four degrees of freedom in the horizontal direction.

[0072] like Figure 2 As shown, preferably, the outer periphery of the fixing block 5 is provided with an arc-shaped chamfer 51, and the two end corners of the workpiece 3 are provided with recesses 31. The arc-shaped chamfer 51 and the recesses 31 cooperate to achieve the positioning of the workpiece 3. Through the cooperation of the arc-shaped chamfer 51 and the arc-shaped recesses 31, when the pusher 6 presses the workpiece 3 against the fixing block 5 in the horizontal plane, the workpiece 3 is restricted and positioned in four degrees of freedom in the horizontal direction. At the same time, the arc-shaped surfaces cooperate to avoid damage to the workpiece 3.

[0073] In one embodiment, the fixing block 5 is made of wear-resistant material. After being processed separately, the fixing block 5 is installed on the placement table 2, so the position of the fixing block 5 can also be adjusted according to the position of the workpiece 3. For workpiece 3 without the recess 31, the fixing block 5 can also be positioned by abutting against the side wall of the second side of the workpiece 3.

[0074] like Figure 1 and Figure 2 As shown, multiple pressure plate mechanisms 4 are provided and distributed around the placement table 2. By setting multiple pressure plate mechanisms 4 around the placement table 2, the load can be effectively distributed and the workpiece 3 can be positioned in multiple positions, reducing the vibration and shaking of the workpiece 3 and improving the processing stability.

[0075] In one embodiment, each pressure plate mechanism 4 is connected to a power mechanism. In other embodiments, multiple pressure plate mechanisms 4 may be connected to the same power mechanism. By controlling the clamping force of the pressure plate mechanisms through the power mechanism, uniform force can be applied to various parts of the workpiece, making the clamping force uniformly adjustable and preventing deformation of the workpiece 3 during processing.

[0076] like Figure 4 and Figure 6As shown, in this embodiment, four pressure plate mechanisms 4 are provided. Two pressure plate mechanisms 4 are located on the first side of the workpiece 3, close to the two fixing blocks 5, and inside the fixing blocks 5. The other two pressure plate mechanisms 4 are located on the second side of the workpiece 3, close to the pusher 6, and on both sides of the pusher 6. The pressure plate mechanisms 4 and fixing blocks 5 at both ends of the workpiece 3 are symmetrically arranged with respect to the axis of the pusher 6, so the workpiece 3 can be positioned in all directions, effectively distributing the load and preventing deformation of the workpiece 3.

[0077] The power mechanism includes one of a hydraulic cylinder, a motor, or a pneumatic cylinder. By controlling the driving force of the hydraulic cylinder, motor, or pneumatic cylinder, the clamping force of the pressure plate mechanism is controlled, thereby achieving uniform adjustment of the clamping force on the workpiece, preventing deformation of the workpiece during processing, and through the control of the power mechanism, rapid clamping can be achieved, resulting in high clamping efficiency.

[0078] In this embodiment, the power mechanism is a hydraulic cylinder 41, which is located below the pressure plate mechanism, and the output end of the hydraulic cylinder 41 is connected to the pressure plate mechanism 4.

[0079] like Figure 2 and Figure 5 As shown, the pressure plate mechanism 4 includes a pressure plate 42 and a lever 43. One end of the pressure plate 42 is connected to the hydraulic cylinder 41, and the other end is a free end. The lever 43 is hinged to the middle of the pressure plate 42. When the hydraulic cylinder 41 descends, it drives the pressure plate 42 to rotate around the hinge of the lever 43, and its free end is lifted. At this time, the workpiece 3 is not pressed. When the hydraulic cylinder 41 rises, it drives the pressure plate 42 to rotate around the hinge of the lever 43, and its free end descends and presses against the surface of the workpiece 3, thereby fixing the workpiece 3 in the vertical direction. The hydraulic cylinder 41 controls the pressing force of the pressure plate 42, avoiding excessive pressure that could damage the workpiece 3 or cause indentations or deformation. Different operators can also quickly position and fix the workpiece 3 at once. The fixture is lightweight, the hydraulic cylinder 41 presses quickly during clamping, the clamping efficiency is high, and the time consumed during batch processing is shorter. The workpiece 3 can remain stable during processing and is not prone to shaking. The dimensions are stable during continuous processing, and the dimensional range is within the acceptable range.

[0080] In one embodiment, the free end of the pressure plate 42 presses against the upper surface near the edge of the workpiece 3, resulting in a small contact area. The pressure plate 42, which is a lever 43 type, amplifies the operating force through the lever 43 principle, achieving rapid clamping. Furthermore, the stroke of the hydraulic cylinder 41 is easy to control, ensuring uniform downward pressure of the pressure plate 42, guaranteeing stability during processing, and the clamping force is adjustable, preventing deformation or indentation of the workpiece during processing.

[0081] In one embodiment, a shim block 44 is provided at the bottom of the hydraulic cylinder 41. The hydraulic cylinder 41 and the shim block 44 are detachably installed and fixed. The shim block 44 can be provided with space to accommodate the oil circuit. On the one hand, it facilitates the connection of the oil circuit of the hydraulic cylinder 41, and on the other hand, it can adjust the height of the pressure plate 42, so as to be suitable for workpieces 3 of different thicknesses.

[0082] This utility model employs a pressure plate mechanism 4, combined with a fixing block 5 and a pushing component 6, which allows the surface of the workpiece 3 to adhere to the placement table 2. It is suitable for all sheet-shaped workpieces 3, offering high surface precision, simple clamping, and effectively improving the dimensional stability and convenience of the parts. Furthermore, it provides good shock resistance during processing, runs smoothly, and boasts high work efficiency. This fixture offers high cost-effectiveness and is suitable for the stable processing of mass-produced products.

[0083] During clamping, the first sidewall of workpiece 3 is placed against the fixing block 5, with the recess 31 of workpiece 3 engaging with the arc-shaped chamfer 51 of the fixing block 5. Then, the operating lever 62 is pressed down, causing the crank 63 to rotate, which in turn moves the push rod 64 toward workpiece 3 and pushes against the second sidewall of workpiece 3, thus clamping workpiece 3 between the fixing block 5 and the pusher 6 in the horizontal plane, achieving horizontal positioning. Then, the pressure plate 42 is driven by the hydraulic cylinder 41, and the free end of the pressure plate 42 moves downward to press against the top surface of workpiece 3, pressing workpiece 3 downward and making it adhere to the placement table 2. In this way, the vertical direction and all six degrees of freedom in the horizontal plane of workpiece 3 are restricted, achieving complete positioning and ensuring good positioning accuracy.

[0084] The pressure plate type fixture of this utility model is used to clamp the workpiece 3. The continuous processing of the workpiece 3 by different operators is tested and verified. The results show that the product size and appearance meet the product requirements, and the size variation is within 0.05 mm. The processing and clamping efficiency is greatly improved, which effectively helps the mass production of the product.

[0085] Although the present invention has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of the invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A pressure plate type clamp, characterized in that, include: A placement platform, used to place workpieces; At least one pressure plate mechanism is disposed on one side of the placement table, the pressure plate mechanism being configured to be located in a first position in a first direction to press the workpiece; A power mechanism is connected to the pressure plate mechanism, and the power mechanism is configured to drive the pressure plate mechanism to press or release the workpiece. At least one fixing block is fixed to the placement platform, and the fixing block is located on the first side of the workpiece; A pusher is disposed on the second side opposite to the workpiece; The fixing block and the pushing member are respectively located in a second position and a third position in a second direction within the plane of the workpiece to abut against the opposite sides of the workpiece.

2. The pressure plate type clamp according to claim 1, characterized in that, The pusher includes: A base, one end of which is provided with a first hinge portion, and the other end of which is provided with a sleeve; An operating lever, which is hinged to the first hinge portion; A push rod is inserted through the sleeve, with one end of the push rod hinged to the operating rod and the other end pushing against the side wall of the workpiece.

3. The pressure plate type clamp according to claim 2, characterized in that, A crank is provided between the push rod and the operating lever. One end of the crank is hinged to the end of the push rod, and the other end is hinged to the operating lever.

4. The pressure plate type clamp according to claim 2, characterized in that, The push rod has a thread at one end facing the workpiece, and a nut is screwed into the thread. The end face of the nut pushes against the side wall of the workpiece.

5. The pressure plate type clamp according to claim 2, characterized in that, The base has a heightening block at its bottom.

6. The pressure plate type clamp according to claim 1, characterized in that, Two fixing blocks are provided, located at the two corners of the first side of the workpiece, and the pushing member is located in the middle of the second side of the workpiece.

7. The pressure plate type clamp according to claim 6, characterized in that, The outer periphery of the fixing block is provided with an arc-shaped chamfer, which cooperates with the recess on the workpiece to position the workpiece.

8. The pressure plate type clamp according to claim 1, characterized in that, Multiple pressure plate mechanisms are provided and distributed around the placement platform, and the multiple pressure plate mechanisms are connected to one or more of the power mechanisms.

9. The pressure plate type clamp according to claim 1, characterized in that, The pressure plate mechanism includes: A pressure plate, one end of which is connected to the power mechanism; and A lever, which is hinged to the middle of the pressure plate.

10. The pressure plate clamp according to claim 1 or 9, characterized in that, The power mechanism includes one of a hydraulic cylinder, a motor, or a pneumatic cylinder.

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