Four-corner hydraulic cylinder type clamping jig

Abstract

The utility model relates to jig technical field discloses four -angle hydraulic cylinder formula clamping jig, include: base, the central area of base is fixed with vertical positioning pin column, the periphery of vertical positioning pin column is embedded with the elastic pin subassembly perpendicular to itself, the elastic pin subassembly includes installation support and transverse elastic pin, the inside of transverse elastic pin is provided with return spring, the four -angle position of base each fixed mounting has one corner hydraulic cylinder, the output end of each corner hydraulic cylinder all is connected with the pressure arm, the movable range of pressure arm covers the area above vertical positioning pin column. Through the vertical positioning pin column on the base realizes the vertical positioning of work piece, and combining the elastic pin subassembly that it periphery is arranged perpendicularly, can carry out the horizontal direction positioning and pre -tightening of work piece initially, simultaneously, the corner hydraulic cylinder of base four -angle drives the pressure arm to cover the area above vertical positioning pin column, can from multiple directions steady clamping work piece, promotes the accuracy and stability of clamping.

Description

Technical Field

[0001] This utility model relates to the field of fixture technology, specifically a four-corner hydraulic cylinder clamping fixture. Background Technology

[0002] Existing clamping fixtures suffer from insufficient coordination between positioning and clamping structures: when positioning is achieved using only a single pin, the workpiece is prone to horizontal displacement, making precise pre-positioning impossible; at the same time, traditional clamping structures are mostly single-sided or bi-directional clamping, making it difficult to clamp the workpiece synchronously and stably from multiple directions, resulting in poor stability after clamping and easily affecting machining accuracy; furthermore, the integration of positioning and clamping structures is low, making assembly complex and clamping operations cumbersome, making it difficult to balance positioning accuracy and clamping efficiency. Utility Model Content

[0003] The purpose of this utility model is to provide a four-corner hydraulic cylinder clamping fixture to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a four-corner hydraulic cylinder clamping fixture, comprising: A base, wherein a vertical positioning pin is fixed in the central area of ​​the base, and an elastic pin assembly perpendicular to itself is embedded on the periphery of the vertical positioning pin. The elastic pin assembly includes a mounting bracket and a transverse elastic pin, and a return spring is configured inside the transverse elastic pin. A corner hydraulic cylinder is fixedly installed at each of the four corners of the base. The output end of each corner hydraulic cylinder is connected to a clamping arm. The range of motion of the clamping arm covers the area above the vertical positioning pin.

[0005] The beneficial effects of adopting the above technical solution are: the vertical positioning of the workpiece is achieved by the vertical positioning pin on the base, and the elastic pin components set vertically on its periphery can perform preliminary horizontal positioning and pre-tightening of the workpiece; at the same time, the corner hydraulic cylinders at the four corners of the base drive the clamping arms to cover the vertical positioning pin, which can stably clamp the workpiece from multiple directions, improving the accuracy and stability of clamping.

[0006] As a further improvement of this utility model, an operating platform is installed on the top of the base, and the elastic pin assembly and the vertical positioning pin are both embedded in the operating platform. A bearing ring is placed at the center of the top of the operating platform.

[0007] The beneficial effects of adopting the above technical solution are: the operating table on the top of the base provides an integrated installation carrier for the elastic pin assembly and vertical positioning pin, which facilitates the assembly and maintenance of the structure; the bearing ring on the operating table can be adapted to workpieces of specific shapes, further improving the regularity of workpiece placement and assisting in more accurate positioning.

[0008] As a further improvement of this utility model, the output end of the rotary hydraulic cylinder is detachably connected to the clamping arm by bolts, and the bottom of the clamping arm is provided with a pressure head for clamping the workpiece, and the pressure head is detachably connected to the clamping arm by fastening bolts.

[0009] The beneficial effects of adopting the above technical solution are: the angle hydraulic cylinder and the clamping arm are detachably connected by bolts, which facilitates the replacement or maintenance of the clamping arm; the pressure head at the bottom of the clamping arm is detachable by fastening bolts, and the appropriate pressure head can be replaced according to the different shapes and sizes of the workpiece, thereby improving the versatility of the fixture.

[0010] As a further improvement of this utility model, the pressing surface of the pressure head is provided with anti-slip texture, which extends along the length direction of the pressing arm.

[0011] The beneficial effects of adopting the above technical solution are: the anti-slip texture of the pressure head pressing surface extends along the length of the pressure arm, which can increase the friction between the pressure head and the workpiece, avoid the workpiece from slipping or shifting during processing, and improve the reliability of clamping.

[0012] As a further improvement of this utility model, the diameter of the vertical positioning pin is greater than the diameter of the horizontal elastic pin.

[0013] The beneficial effects of adopting the above technical solution are: the diameter of the vertical positioning pin is larger than that of the horizontal elastic pin, which can ensure the structural strength of the vertical positioning pin and better bear the vertical positioning and support of the workpiece. At the same time, the horizontal elastic pin can flexibly realize the pre-tightening in the horizontal direction. The combination of the two makes the positioning more reasonable.

[0014] As a further improvement of this utility model, the top of the vertical positioning pin is provided with a first conical guide portion, and the side of the transverse elastic pin facing the vertical positioning pin is provided with a second conical guide portion.

[0015] The beneficial effects of adopting the above technical solution are: the first conical guide part at the top of the vertical positioning pin facilitates the quick insertion and positioning of the workpiece, and the second conical guide part facing the side of the horizontal elastic pin towards the vertical positioning pin can guide the elastic pin assembly to adapt to the workpiece, reduce the alignment difficulty during workpiece installation, and improve the convenience of clamping operation.

[0016] As a further improvement of this utility model, the edge region of the base is provided with a plurality of mounting holes for connecting to processing equipment, and the mounting holes are evenly distributed along the circumference of the base.

[0017] The beneficial effects of adopting the above technical solution are: the mounting holes evenly distributed around the circumference of the base edge facilitate the stable installation of the entire fixture on different processing equipment, improve the adaptability and stability of the fixture, and ensure that the fixture itself will not shift during the processing.

[0018] As a further improvement of this utility model, the operating table is provided with several vertical positioning pins and corresponding elastic pin assemblies, and the several vertical positioning pins and elastic pin assemblies are evenly distributed along the circumference of the bearing ring.

[0019] The beneficial effects of adopting the above technical solution are: the bearing ring with several vertical positioning pins and elastic pin assemblies evenly distributed in the circumference can position and pre-tighten multiple positions of the ring-shaped workpiece, making the workpiece more uniformly stressed and further improving the stability and positioning accuracy of the workpiece clamping. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of the four-corner hydraulic cylinder clamping fixture of this utility model; Figure 2 This is a top view of the four-corner hydraulic cylinder clamping fixture of this utility model. Figure 3 This is a schematic diagram of the disassembly structure of the corner hydraulic cylinder of the four-corner hydraulic cylinder clamping fixture of this utility model. Figure 4 This utility model relates to a four-corner hydraulic cylinder clamping fixture. Figure 3 Enlarged structural diagram at point A in the middle; Figure 5 This is a schematic diagram of the structure of a corner hydraulic cylinder for installing the four-corner hydraulic cylinder clamping fixture of this utility model.

[0022] In the diagram: 1. Base; 2. Vertical positioning pin; 21. First conical guide; 3. Elastic pin assembly; 31. Mounting bracket; 32. Horizontal elastic pin; 33. Second conical guide; 4. Corner hydraulic cylinder; 5. Clamping arm; 6. Operating platform; 7. Bearing ring; 8. Pressure head; 9. Fastening bolt. Detailed Implementation

[0023] 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.

[0024] Please see Figures 1-5 This utility model provides a four-corner hydraulic cylinder clamping fixture, comprising: The base 1 has a vertical positioning pin 2 fixed in the central area of ​​the base 1. The vertical positioning pin 2 has a flexible pin assembly 3 that is perpendicular to itself embedded on its periphery. The flexible pin assembly 3 includes a mounting bracket 31 and a transverse flexible pin 32. The transverse flexible pin 32 is equipped with a return spring. A corner hydraulic cylinder 4 is fixedly installed at each of the four corners of the base 1. Each corner hydraulic cylinder 4 is connected to a clamping arm 5 at its output end. The range of motion of the clamping arm 5 covers the area above the vertical positioning pin 2.

[0025] The beneficial effects of adopting the above technical solution are as follows: the vertical positioning pin 2 on the base 1 achieves vertical positioning of the workpiece, and combined with the elastic pin assembly 3 vertically arranged around its perimeter, the workpiece can be initially positioned and pre-tightened in the horizontal direction; at the same time, the corner hydraulic cylinders 4 at the four corners of the base 1 drive the clamping arms 5 to cover the vertical positioning pin 2, which can stably clamp the workpiece from multiple directions, improving the accuracy and stability of clamping. From a top view, the four clamping arms 5 are arranged in a cross shape.

[0026] In one embodiment of this utility model, an operating table 6 is installed on the top of the base 1, and the elastic pin assembly 3 and the vertical positioning pin 2 are both embedded in the operating table 6. A bearing ring 7 is placed at the center of the top of the operating table 6.

[0027] The beneficial effects of adopting the above technical solution are: the operating table 6 on the top of the base 1 provides an integrated installation carrier for the elastic pin assembly 3 and the vertical positioning pin 2, which facilitates the assembly and maintenance of the structure; the bearing ring 7 on the operating table 6 can be adapted to workpieces of specific shapes, further improving the regularity of workpiece placement and assisting in more accurate positioning.

[0028] In one embodiment of this utility model, the output end of the rotary hydraulic cylinder 4 is detachably connected to the clamping arm 5 by bolts. The bottom of the clamping arm 5 is provided with a pressure head 8 for clamping the workpiece. The pressure head 8 is detachably connected to the clamping arm 5 by fastening bolts 9.

[0029] The beneficial effects of adopting the above technical solution are: the angle hydraulic cylinder 4 and the clamping arm 5 are detachably connected by bolts, which facilitates the replacement or maintenance of the clamping arm 5; the pressure head 8 at the bottom of the clamping arm 5 is detachable by fastening bolts 9, and the appropriate pressure head 8 can be replaced according to the different shapes and sizes of the workpiece, thereby improving the versatility of the fixture.

[0030] In one embodiment of this utility model, the pressing surface of the pressing head 8 is provided with anti-slip texture, which extends along the length direction of the pressing arm 5.

[0031] The beneficial effects of adopting the above technical solution are: the anti-slip texture of the pressing surface of the pressure head 8 extends along the length of the pressing arm 5, which can increase the friction between the pressure head 8 and the workpiece, avoid the workpiece from slipping or shifting during processing, and improve the reliability of clamping.

[0032] In one embodiment of this utility model, the diameter of the vertical positioning pin 2 is greater than the diameter of the horizontal elastic pin 32.

[0033] The beneficial effects of adopting the above technical solution are: the diameter of the vertical positioning pin 2 is larger than the diameter of the horizontal elastic pin 32, which can ensure the structural strength of the vertical positioning pin 2 and better bear the vertical positioning and support of the workpiece. At the same time, the horizontal elastic pin 32 can flexibly realize the pre-tightening in the horizontal direction. The combination of the two makes the positioning more reasonable.

[0034] In one embodiment of this utility model, a first conical guide portion 21 is provided at the top of the vertical positioning pin 2, and a second conical guide portion 33 is provided on the side of the transverse elastic pin 32 facing the vertical positioning pin 2.

[0035] The beneficial effects of adopting the above technical solution are: the first conical guide part 21 at the top of the vertical positioning pin 2 facilitates the quick insertion and positioning of the workpiece, and the second conical guide part 33 facing the side of the horizontal elastic pin 32 toward the vertical positioning pin 2 can guide the elastic pin assembly 3 to adapt to the workpiece, reduce the alignment difficulty during workpiece installation, and improve the convenience of clamping operation.

[0036] In one embodiment of this utility model, the edge region of the base 1 is provided with a plurality of mounting holes for connecting to processing equipment, and the mounting holes are evenly distributed along the circumference of the base 1.

[0037] The beneficial effects of adopting the above technical solution are: the mounting holes evenly distributed around the edge of the base 1 facilitate the stable installation of the entire fixture on different processing equipment, improve the adaptability and stability of the fixture, and ensure that the fixture itself will not shift during the processing.

[0038] In one embodiment of this utility model, a plurality of vertical positioning pins 2 and elastic pin assemblies 3 are provided, and the plurality of vertical positioning pins 2 and elastic pin assemblies 3 are evenly distributed along the circumference of the bearing ring 7.

[0039] The beneficial effects of adopting the above technical solution are: the several vertical positioning pins 2 and elastic pin components 3 evenly distributed around the circumference of the bearing ring 7 can position and pre-tighten multiple positions of the ring-shaped workpiece, making the workpiece more uniformly stressed and further improving the stability and positioning accuracy of the workpiece clamping.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A four-corner hydraulic cylinder clamping fixture, characterized in that, include: A base, wherein a vertical positioning pin is fixed in the central area of ​​the base, and an elastic pin assembly perpendicular to itself is embedded on the periphery of the vertical positioning pin. The elastic pin assembly includes a mounting bracket and a transverse elastic pin, and a return spring is configured inside the transverse elastic pin. A corner hydraulic cylinder is fixedly installed at each of the four corners of the base. The output end of each corner hydraulic cylinder is connected to a clamping arm. The range of motion of the clamping arm covers the area above the vertical positioning pin.

2. The four-corner hydraulic cylinder clamping fixture according to claim 1, characterized in that, An operating platform is installed on the top of the base. The elastic pin assembly and the vertical positioning pin are both embedded in the operating platform, and a bearing ring is placed at the center of the top of the operating platform.

3. The four-corner hydraulic cylinder clamping fixture according to claim 1, characterized in that, The output end of the rotary hydraulic cylinder is detachably connected to the clamping arm by bolts. The bottom of the clamping arm is provided with a pressure head for clamping the workpiece, and the pressure head is detachably connected to the clamping arm by fastening bolts.

4. The four-corner hydraulic cylinder clamping fixture according to claim 3, characterized in that, The pressing surface of the pressure head is provided with anti-slip texture, which extends along the length of the pressing arm.

5. The four-corner hydraulic cylinder clamping fixture according to claim 1, characterized in that, The diameter of the vertical positioning pin is greater than the diameter of the horizontal elastic pin.

6. The four-corner hydraulic cylinder clamping fixture according to claim 1, characterized in that, The top of the vertical positioning pin is provided with a first conical guide portion, and the side of the transverse elastic pin facing the vertical positioning pin is provided with a second conical guide portion.

7. The four-corner hydraulic cylinder clamping fixture according to claim 1, characterized in that, The base has multiple mounting holes for connecting to processing equipment in its edge region, and the mounting holes are evenly distributed along the circumference of the base.

8. The four-corner hydraulic cylinder clamping fixture according to claim 2, characterized in that, The operating platform is equipped with several vertical positioning pins and corresponding elastic pin assemblies, which are evenly distributed along the circumference of the bearing ring.

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