Self-adjusting clamp

Abstract

The utility model relates to the technical field of die-casting part production, and provides a self-adjusting clamp, which is used for clamping and fixing blanks of die-casting parts with different thicknesses, and comprises a main body, a top block, a pressing block and a connecting rod assembly are arranged on the main body, the connecting rod assembly is provided with a power rod, a first connecting rod and a second connecting rod, the power rod is used for driving the first connecting rod and the second connecting rod to move, and one end of the first connecting rod and the two ends of the second connecting rod are each in transmission connection with one pressing block. The first connecting rod and the second connecting rod can drive the pressing block to descend to different heights according to the thickness of a blank which the pressing block abuts against, so that it is guaranteed that the blanks with different thicknesses are evenly stressed, effective clamping can be completed without additional manual intervention, the adjusting time and the labor cost are greatly saved, and the production efficiency is remarkably improved.

Description

Technical Field

[0001] The utility model relates to the technical field of die-casting parts production, in particular to a self-adjusting clamp. Background Art

[0002] In the production of die-cast parts, due to the inconsistency of the blank thickness of each batch of die-cast parts (parts of the same type), when the existing fixture is working, the staff needs to adjust the fixture according to the blank thickness to make the parts evenly stressed, thereby ensuring the size of the parts. This process greatly consumes time and labor, resulting in low overall work efficiency. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a self-adjusting clamp in view of the current status of the prior art.

[0004] The technical solution adopted by the utility model to solve the above technical problems is: a self-adjusting fixture, which is used to clamp and fix the blanks of die-cast parts with different thicknesses. The self-adjusting fixture includes:

[0005] main body;

[0006] Top blocks, a plurality of top blocks are fixedly arranged on the main body, and are used to provide support for the blank;

[0007] A pressing block, wherein a plurality of the pressing blocks are movably arranged on the main body, the pressing blocks are located above the top block and correspond to the top block one by one, and the pressing blocks movably abut against the blank placed on the top block to tighten the blank;

[0008] A connecting rod assembly, which is arranged on the main body, and the connecting rod assembly comprises a power rod, a first connecting rod and a second connecting rod, the power rod is used to drive the connecting rod assembly to move, the first connecting rod is connected to the power rod, one end of the first connecting rod is transmission-connected to one of the pressing blocks, the middle section of the second connecting rod is connected to one end of the first connecting rod away from the pressing block, and both ends of the second connecting rod are transmission-connected to one of the pressing blocks;

[0009] One end of the first connecting rod can move relative to the power rod due to the different thicknesses of the blank pressed by the pressing block connected to it, so as to drive the pressing block to descend to different heights;

[0010] The two ends of the second connecting rod can be at the same distance from the first connecting rod because the thickness of the blank against which the pressing block connected to it is pressed is the same, so as to drive the pressing block to drop to the same height. And the two ends of the second connecting rod can be respectively close to or far away from the first connecting rod because the thickness of the blank against which the pressing block connected to it is pressed is different, so as to drive the pressing block to drop to different heights.

[0011] In the above-mentioned self-adjusting clamp, a connecting column is provided at the end of the power rod, and a connecting hole corresponding to the connecting column is provided on the first connecting rod. The diameter of the connecting hole is larger than the diameter of the connecting column, and the first connecting rod is movably mounted on the connecting column through the connecting hole.

[0012] In the above-mentioned self-adjusting clamp, a first through hole is provided on the connecting column, and a second through hole is provided on the first connecting rod. The second through hole is connected to the connecting hole, and the first through hole is aligned with the second through hole for inserting a first pin, and the diameter of the first through hole is larger than the diameters of the second through hole and the first pin.

[0013] In the above-mentioned self-adjusting clamp, a cylinder is provided at one end of the first connecting rod, a cylindrical hole corresponding to the cylinder is provided in the middle section of the second connecting rod, the diameter of the cylindrical hole is larger than the diameter of the cylinder, and the second connecting rod is movably mounted on the cylinder through the cylindrical hole.

[0014] In the above-mentioned self-adjusting clamp, a waist-shaped through hole is provided on the cylinder, and a third through hole is provided on the second connecting rod. The third through hole is connected to the cylindrical hole, and the waist-shaped through hole is aligned with the third through hole for inserting a second pin, and the width of the second pin in the up and down direction is smaller than the distance between the upper and lower parts of the waist-shaped through hole.

[0015] In the above-mentioned self-adjusting clamp, the connecting rod assembly also includes a third connecting rod and a fourth connecting rod, one end of the third connecting rod is fixedly provided with a pressure block, the other end of the third connecting rod is hinged to the end of the first connecting rod away from the power rod, the two ends of the second connecting rod are respectively hinged with a fourth connecting rod, and the end of the fourth connecting rod away from the second connecting rod is fixedly provided with a pressure block.

[0016] In the above-mentioned self-adjusting clamp, a support plate is provided on the main body, and a plurality of fourth through holes are provided on the support plate. The fourth through holes are used for the third connecting rod and the fourth connecting rod to pass through and provide guidance for the movement of the third connecting rod and the fourth connecting rod.

[0017] Compared with the prior art, the utility model has the advantages that, by arranging a top block, a pressure block and a connecting rod assembly on the main body, the connecting rod assembly comprises a power rod, a first connecting rod and a second connecting rod; when working, the blank is placed on the top block, and the power rod is driven by an external force such as an oil cylinder, thereby linking the first connecting rod and the second connecting rod connected thereto, so that the pressure block moves downward until it is pressed against the blank; when the pressure block connected to the first connecting rod encounters a thicker blank, due to the increase in force, one end connected to the pressure block is caused to deviate toward the power rod direction, resulting in a decrease in the downward stroke of the pressure block compared to thin materials. For the second connecting rod, when the thickness of the blank contacted by the pressure blocks connected to its two ends is consistent, It can ensure that both ends are evenly stressed, maintain equidistant and descend synchronously to ensure uniform clamping. On the contrary, if the pressure blocks connected to the two ends of the second connecting rod face different blank thicknesses, the pressure blocks on the thicker side will converge toward the center of the second connecting rod more than the thinner side under the drive of a larger reaction force, forming an asymmetric displacement, thereby realizing adaptive adjustment of the depth of descent of each pressure block according to the thickness of the blank to ensure uniform stress on blanks of different thicknesses. This self-adjusting feature enables the fixture in this solution to automatically adapt to uneven blank thickness of die-cast parts, and to complete effective clamping without additional manual intervention, greatly saving adjustment time and labor costs, and significantly improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is the overall structural diagram of this scheme;

[0019] Figure 2 It is a schematic diagram of the connecting rod assembly structure in this scheme;

[0020] Figure 3 It is a schematic diagram of the power rod structure in this scheme;

[0021] Figure 4 It is a schematic diagram of the first connecting rod structure in this scheme;

[0022] Figure 5 It is a schematic diagram of the second connecting rod structure in this scheme;

[0023] Figure 6 It is a schematic diagram of the support plate structure in this scheme.

[0024] In the figure, 1, main body; 2, top block; 3, pressure block; 4, connecting rod assembly; 5, power rod; 6, first connecting rod; 7, second connecting rod; 8, connecting column; 9, connecting hole; 10, first through hole; 11, second through hole; 12, cylinder; 13, cylindrical hole; 14, waist-shaped through hole; 15, third through hole; 16, third connecting rod; 17, fourth connecting rod; 18, support plate; 19, fourth through hole. DETAILED DESCRIPTION

[0025] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0026] like Figures 1 to 6 As shown, a self-adjusting fixture of the utility model is used to clamp and fix the blanks of die-cast parts of different thicknesses. The self-adjusting fixture includes:

[0027] Subject 1;

[0028] Top block 2: Several top blocks 2 are fixed on the main body 1 to provide support for the blank;

[0029] The pressing blocks 3 are movably provided on the main body 1. The pressing blocks 3 are located above the top blocks 2 and correspond to the top blocks 2 one by one. The pressing blocks 3 movably abut against the blank placed on the top blocks 2 to tighten the blank.

[0030] A connecting rod assembly 4 is arranged on the main body 1. The connecting rod assembly 4 has a power rod 5, a first connecting rod 6 and a second connecting rod 7. The power rod 5 drives the connecting rod assembly 4 to move through a power mechanism such as a cylinder. The first connecting rod 6 is connected to the power rod 5. One end of the first connecting rod 6 is transmission-connected to a pressure block 3. The middle section of the second connecting rod 7 is connected to the end of the first connecting rod 6 away from the pressure block 3. Both ends of the second connecting rod 7 are transmission-connected to a pressure block 3. The second connecting rod 7 is preferably a bilaterally symmetrical structure.

[0031] One end of the first connecting rod 6 can move relative to the power rod 5 due to the different thickness of the blank pressed by the pressing block 3 connected to it, so as to drive the pressing block 3 to descend to different heights;

[0032] The two ends of the second connecting rod 7 can be the same distance away from the first connecting rod 6 because the thickness of the blank pressed by the pressing block 3 connected to it for transmission is the same, and can be used to drive the pressing block 3 to drop to the same height. And due to the different thicknesses of the blank pressed by the pressing block 3 connected to it for transmission, the two ends can be close to or away from the first connecting rod 6 respectively, and can be used to drive the pressing block 3 to drop to different heights respectively.

[0033] During operation, the blank is placed on the top block 2, and the power rod 5 is driven by an external force such as an oil cylinder, thereby linking the first connecting rod 6 and the second connecting rod 7 connected thereto, so that the pressing block 3 moves downward until it is pressed against the blank; when the pressing block 3 connected to the first connecting rod 6 encounters a thicker blank, the force increases, causing one end connected to the pressing block 3 to deviate toward the power rod 5, resulting in a smaller descending stroke of the pressing block 3 than when the material is thin. For the second connecting rod 7, when the thickness of the blank contacted by the pressing block 3 connected to its two ends is consistent, it can ensure that the two ends are evenly stressed, maintain equidistant and descend synchronously, and ensure uniform clamping. On the contrary, if the thickness of the blanks faced by the pressure blocks 3 that are transmission-connected to the two ends of the second connecting rod 7 is different, the pressure blocks 3 on the thicker side will converge toward the center of the second connecting rod 7 more than the thinner side under the drive of the larger reaction force, forming an asymmetric displacement, thereby realizing the adaptive adjustment of the descending depth of each pressure block 3 according to the thickness of the blank, ensuring that the blanks of different thicknesses are subjected to uniform force. This self-adjusting feature enables the clamp in this scheme to automatically adapt to the uneven thickness of the blanks of the die-cast parts, and to complete effective clamping without additional manual intervention, thereby greatly saving adjustment time and labor costs, and significantly improving production efficiency.

[0034] More specifically, a connecting column 8 is provided at the end of the power rod 5, and a connecting hole 9 corresponding to the connecting column 8 is provided on the first connecting rod 6. The diameter of the connecting hole 9 is larger than the diameter of the connecting column 8. The first connecting rod 6 is movably sleeved on the connecting column 8 through the connecting hole 9. When encountering a thicker blank, the reaction force borne by the pressure block 3 that is transmission-connected to the first connecting rod 6 is enhanced. This enhanced force prompts the first connecting rod 6 to rotate with the connecting column 8 as the fulcrum, so that the side of the connecting hole 9 close to this end moves toward the connecting column 8, thereby effectively reducing the vertical descent range of the pressure block 3.

[0035] More specifically, a first through hole 10 is provided on the connecting column 8, and a second through hole 11 is provided on the first connecting rod 6. The second through hole 11 is connected to the connecting hole 9, and the first through hole 10 is aligned with the second through hole 11 for inserting a first pin, wherein the diameter of the first through hole 10 is designed to be slightly larger than the first pin, ensuring that the first pin can pass through the first through hole 10 and the second through hole 11 without resistance, and the diameter of the second through hole 11 is closely matched with the first pin, so that when the first pin passes through the two holes, it can form a fixed connection point at the second through hole 11, preventing the first connecting rod 6 from unnecessary rotation or sliding relative to the connecting column 8, ensuring effective force transmission, and allowing the first pin to have a certain amount of room for movement in the first through hole 10 to accommodate slight displacements between components.

[0036] More specifically, a cylinder 12 is provided at one end of the first connecting rod 6, and a cylindrical hole 13 corresponding to the cylinder 12 is provided in the middle section of the second connecting rod 7. The diameter of the cylindrical hole 13 is larger than the diameter of the cylinder 12, and the second connecting rod 7 is movably mounted on the cylinder 12 through the cylindrical hole 13.

[0037] More specifically, a waist-shaped through hole 14 is provided on the cylinder 12, and a third through hole 15 is provided on the second connecting rod 7. The third through hole 15 is connected to the cylindrical hole 13. The waist-shaped through hole 14 is aligned with the third through hole 15 for inserting the second pin. The width of the second pin in the up and down directions is smaller than the distance between the upper and lower waist-shaped through hole 14, thereby ensuring that the second pin has a certain amount of space for movement in the waist-shaped through hole 14, allowing the second connecting rod 7 to move appropriately along the cylinder 12 as the thickness of the workpiece changes, while ensuring a firm connection between the various components to prevent excessive movement or separation.

[0038] When the pressure blocks 3 at both ends of the second connecting rod 7 contact the blank of the same thickness, it can ensure that the pressure blocks 3 at both ends are subjected to balanced pressure, maintain equal distance and move downward synchronously, so as to achieve uniform clamping of the blank. On the contrary, if the thickness of the blank faced by the pressure blocks 3 at both ends is different, the pressure block 3 on the thicker side will converge toward the center of the second connecting rod 7 more than the thin side under the drive of the larger reaction force, so that the second connecting rod 7 rotates with the cylinder 12 as the fulcrum. At this time, the third perforation 15 moves toward the direction of the waist-shaped hole close to the thin side. Compared with the distance between the end of the second connecting rod 7 connected by the thin side pressure block 3 and the cylinder 12, the distance between the end of the second connecting rod 7 connected by the thick side pressure block 3 and the cylinder 12 is smaller, so that the descending stroke of the thick side pressure block 3 is shorter than that of the thin side, so as to adapt to workpieces of different thicknesses and maintain the consistency of the clamping effect.

[0039] More specifically, the connecting rod assembly 4 also includes a third connecting rod 16 and a fourth connecting rod 17. A pressure block 3 is fixedly provided at one end of the third connecting rod 16. The other end of the third connecting rod 16 is hinged to the end of the first connecting rod 6 away from the power rod 5. A fourth connecting rod 17 is hinged at each end of the second connecting rod 7. A pressure block 3 is fixedly provided at the end of the fourth connecting rod 17 away from the second connecting rod 7. When the power rod 5 drives the first connecting rod 6 and the second connecting rod 7 to move, the pressure block 3 in contact with the blank is directly affected by the third connecting rod 16 and the fourth connecting rod 17. This design ensures that no matter how the thickness of the blank changes, the connecting rod assembly 4 can maintain uniform and appropriate clamping force through multi-point and multi-directional force transmission and adjustment, thereby ensuring the stability and accuracy of the processing. Preferably, the third connecting rod 16 and the fourth connecting rod 17 are exactly the same in shape and size, thereby ensuring that the mechanical properties of the connecting rod assembly 4 at different parts are consistent.

[0040] More specifically, a support plate 18 is provided on the main body 1, and a plurality of fourth through holes 19 are provided on the support plate 18. The fourth through holes 19 are used for allowing the third link 16 and the fourth link 17 to pass through and provide guidance for the movement of the third link 16 and the fourth link 17, thereby ensuring that the third link 16 and the fourth link 17 can move smoothly along a predetermined trajectory when performing their functions, thereby maintaining the stability and accuracy of the entire self-adjusting clamp system.

[0041] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0042] In addition, in the present invention, the descriptions of "first", "second", "one", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0043] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0045] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the scope defined by the spirit of the present invention.

Claims

1. A self-adjusting fixture for clamping and fixing blanks of die-cast parts of different thicknesses, characterized in that: Self-adjusting fixtures include: main body; Top blocks, a plurality of top blocks are fixedly arranged on the main body, and are used to provide support for the blank; A pressing block, wherein a plurality of the pressing blocks are movably arranged on the main body, the pressing blocks are located above the top block and correspond to the top block one by one, and the pressing blocks movably abut against the blank placed on the top block to tighten the blank; A connecting rod assembly, which is arranged on the main body, and the connecting rod assembly comprises a power rod, a first connecting rod and a second connecting rod, the power rod is used to drive the connecting rod assembly to move, the first connecting rod is connected to the power rod, one end of the first connecting rod is transmission-connected to one of the pressing blocks, the middle section of the second connecting rod is connected to one end of the first connecting rod away from the pressing block, and both ends of the second connecting rod are transmission-connected to one of the pressing blocks; One end of the first connecting rod can move relative to the power rod due to the different thicknesses of the blank pressed by the pressing block connected to it, so as to drive the pressing block to descend to different heights; The two ends of the second connecting rod can be at the same distance from the first connecting rod because the thickness of the blank against which the pressing block connected to it is pressed is the same, so as to drive the pressing block to drop to the same height. And the two ends of the second connecting rod can be respectively close to or far away from the first connecting rod because the thickness of the blank against which the pressing block connected to it is pressed is different, so as to drive the pressing block to drop to different heights.

2. A self-adjusting fixture as claimed in claim 1, characterized in that: A connecting column is arranged at the end of the power rod, a connecting hole corresponding to the connecting column is arranged on the first connecting rod, the diameter of the connecting hole is larger than the diameter of the connecting column, and the first connecting rod is movably sleeved on the connecting column through the connecting hole.

3. A self-adjusting fixture as claimed in claim 2, characterized in that: The connecting column is provided with a first through hole, the first connecting rod is provided with a second through hole, the second through hole is connected with the connecting hole, the first through hole is aligned with the second through hole for inserting a first pin, and the diameter of the first through hole is larger than the diameters of the second through hole and the first pin.

4. A self-adjusting fixture as claimed in claim 1, characterized in that: A cylinder is arranged at one end of the first connecting rod, a cylindrical hole corresponding to the cylinder is arranged at the middle section of the second connecting rod, the diameter of the cylindrical hole is larger than the diameter of the cylinder, and the second connecting rod is movably mounted on the cylinder through the cylindrical hole.

5. A self-adjusting clamp as claimed in claim 4, characterized in that: The cylinder is provided with a waist-shaped through hole, and the second connecting rod is provided with a third through hole, the third through hole is connected with the cylindrical hole, the waist-shaped through hole is aligned with the third through hole, and is used to insert a second pin, and the width of the second pin in the up and down direction is smaller than the distance between the upper and lower parts of the waist-shaped through hole.

6. A self-adjusting fixture as claimed in claim 1, characterized in that: The connecting rod assembly also includes a third connecting rod and a fourth connecting rod. A pressure block is fixedly provided at one end of the third connecting rod. The other end of the third connecting rod is hinged to an end of the first connecting rod away from the power rod. The two ends of the second connecting rod are respectively hinged to a fourth connecting rod. A pressure block is fixedly provided at one end of the fourth connecting rod away from the second connecting rod.

7. A self-adjusting clamp as claimed in claim 6, characterized in that: A support plate is provided on the main body, and a plurality of fourth through holes are provided on the support plate. The fourth through holes are used for the third connecting rod and the fourth connecting rod to pass through and provide guidance for the movement of the third connecting rod and the fourth connecting rod.

Images