Positioning clamp for hollow square tube type part

Abstract

The utility model relates to the technical field of positioning clamps, and discloses a positioning clamp for a hollow square tube type part. The positioning fixture comprises a support frame, a fixing device, a hoisting fixture and a clamping device, the supporting frame is provided with vertical channel steel, and one side of a web of the vertical channel steel is fixedly connected with the fixing device. The fixing device is provided with a lifting rod which is fixed at the upper end of the vertical channel steel; the hoisting clamp is provided with an inner clamping clamp and a hoisting ring; the upper end of the inner clamping clamp is fixedly connected with the lower end of the hoisting ring; the clamping device is provided with an air cylinder fixing frame, a three-shaft air cylinder with a guide rod and a fixing clamping block, and the air cylinder fixing frame is fixed to wing plates on the two sides of the vertical steel channel. According to the utility model, safe hoisting, nondestructive protection and high-precision vertical positioning of parts are realized, and the requirement of precision detection is met.

Description

Technical Field

[0001] The utility model relates to the technical field of positioning fixtures, in particular to a positioning fixture used for hollow square tube parts. Background Art

[0002] Long hollow square tube precision parts are widely used in various industrial equipment that require high precision and high reliability due to their special structure and material requirements. In the existing technology, threaded holes (such as 4 M8 screw holes) reserved on the parts are usually connected to standard lifting equipment for lifting. However, due to the brittle nature of silicon carbide, it is easy to break or be damaged during lifting; and the parts after lifting need to be inspected for the accuracy of the four sides of the parts, which requires that the four sides of the parts cannot be subjected to force; at the same time, since such parts need to be accurately positioned after being lifted to a high altitude (for example, above 4800mm), manual operation is not only difficult but also poses safety risks.

[0003] In summary, the existing lifting method for long hollow square tube precision parts has the disadvantages of easy damage of the material, inability of the four sides to bear force, and difficulty in manual operation of high-altitude positioning and safety risks. Utility Model Content

[0004] In order to solve the problems existing in the prior art, the utility model provides a positioning fixture for hollow square tube-shaped parts.

[0005] The embodiment of the utility model provides a positioning fixture for hollow square tube-shaped parts, comprising a support frame, a fixing device, a lifting fixture and a clamping device;

[0006] The support frame is provided with a vertical channel steel, an oblique support frame is fixed to one side of the web of the vertical channel steel, and the other side of the web of the vertical channel steel is fixedly connected to the fixing device;

[0007] The fixing device is provided with a hanging rod, which is fixed to the upper end of the vertical channel steel by bolts, and the center point of the hanging rod is located on the vertical center line of the vertical channel steel;

[0008] The lifting fixture is provided with an inner clamping fixture and a lifting ring, the upper end of the inner clamping fixture is fixedly connected to the lower end of the lifting ring, and the lifting ring is movably provided on the lifting rod;

[0009] The clamping device is provided with a cylinder fixing frame, a three-axis cylinder with a guide rod and a fixed clamp block. The cylinder fixing frame is fixed to the wing plates on both sides of the vertical channel steel, the three-axis cylinder with a guide rod is fixed above the cylinder fixing frame, and the fixed clamp block is fixed to the piston rod of the three-axis cylinder with a guide rod.

[0010] According to an embodiment of the present invention, a mounting hole is provided on the upper end of the web of the vertical channel steel, and one end of the hanger rod is fixed in the mounting hole by a bolt; fixing gaskets are respectively provided on both sides of the mounting hole.

[0011] According to an embodiment of the present utility model, a limiting device is provided on the suspension rod; the limiting device is provided with a limiting bolt and a limiting block, and the suspension ring is movably provided between the limiting bolt and the limiting block.

[0012] According to an embodiment of the present invention, the limit stopper is a conical stopper.

[0013] According to an embodiment of the present invention, a limiting hole is provided in the middle of the lifting ring, and a first fixing hole and a second fixing hole are provided on both sides of the limiting hole;

[0014] The lifting ring is movably arranged on the lifting rod through the limiting hole, and the lifting ring is fixedly connected to the inner clamping fixture through the first fixing hole.

[0015] According to an embodiment of the present utility model, the cylinder fixing frame is provided with a first connecting plate and a second connecting plate, and the first connecting plate and the second connecting plate are vertically arranged;

[0016] The first connecting plate is used for fixed connection with the wing plate of the channel steel, and the second connecting plate is used for fixed connection with the three-axis guide rod cylinder.

[0017] According to an embodiment of the present invention, a plurality of through holes are provided on both the first connecting plate and the second connecting plate; and reinforcing ribs are provided between the first connecting plate and the second connecting plate.

[0018] According to an embodiment of the present invention, the three-axis guide rod cylinder is provided at both ends of the second connecting plate.

[0019] The present utility model provides a positioning fixture for hollow square tube-type parts, which realizes the safe lifting, non-destructive protection and high-precision vertical positioning of the parts, meeting the needs of precision testing. The vertical channel steel and the oblique support frame of the support frame are combined to form a stable support frame. The precise alignment of the hanging rod and the vertical channel steel keeps the lifting process vertical, avoiding the shaking and displacement of the parts, thereby ensuring operational safety and detection accuracy. The inner clamping fixture of the lifting fixture is suspended by the lifting ring and the hanging rod, which can ensure that there is no lateral force on the four sides of the part, effectively protecting the precision surface from damage. The three-axis cylinder with guide rod of the clamping device can clamp and position the lifting fixture, realize remote control, and effectively avoid the safety risks of manual high-altitude operation. In summary, the positioning fixture provided by the utility model can suspend the parts in a state without external force, ensure the stability, reliability and high precision of the precision parts, and provide an efficient and safe detection fixture solution for hollow square tube-type parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0021] Figure 1 The schematic diagram shows the structure of a positioning fixture for hollow square tube parts provided according to an embodiment of the present utility model.

[0022] Figure 2 The schematic diagram shows the structure of a vertical channel steel provided according to an embodiment of the present utility model.

[0023] Figure 3 The schematic diagram shows the structure of a suspension rod provided according to an embodiment of the present utility model.

[0024] Figure 4 The schematic diagram shows the structure of a hanging ring provided according to an embodiment of the present utility model.

[0025] Figure 5 The schematic diagram shows the structure of a cylinder fixing bracket provided according to an embodiment of the present utility model.

[0026] In the figure, 1. vertical channel steel; 2. lifting rod; 3. internal clamping fixture; 4. lifting ring; 5. cylinder fixing bracket; 6. three-axis cylinder with guide rod; 7. fixing clamp; 8. mounting hole; 9. fixing gasket; 10. limiting bolt; 11. limiting block; 12. limiting hole; 13. first fixing hole; 14. second fixing hole; 15. first connecting plate; 16. second connecting plate; 17. through hole; 18. reinforcing rib. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0028] In view of the problems existing in the prior art, the present invention provides a positioning fixture for hollow square tube-shaped parts. The present invention will be described in detail below with reference to the accompanying drawings.

[0029] Figure 1 The schematic diagram shows the structure of a positioning fixture for hollow square tube parts provided according to an embodiment of the present utility model.

[0030] like Figure 1 As shown, the positioning fixture for hollow square tube-type parts provided by the embodiment of the present invention includes a support frame, a fixing device, a lifting fixture and a clamping device.

[0031] The support frame is provided with a vertical channel steel 1, an oblique support frame is fixed to one side of the web of the vertical channel steel 1, and the other side of the web of the vertical channel steel 1 is fixedly connected to a fixing device.

[0032] In this embodiment, the support frame consists of a vertical channel steel 1 and a diagonal support frame. The support frame provides support for the entire positioning fixture, ensuring stability during use. The vertical channel steel 1 possesses high strength and stability, capable of withstanding the various forces during lifting and clamping. The diagonal support frame, located on the web side of the vertical channel steel 1, enhances its stability, preventing it from shaking or tilting during lifting and clamping.

[0033] In practical applications, the diagonal support frame can be fixedly connected to the vertical channel steel 1 by bolting or welding. Optionally, the vertical channel steel 1 and the diagonal support frame of the support frame can be made of different steel materials, such as high-strength alloy steel, stainless steel, etc., according to different usage environments and requirements, to improve the strength and corrosion resistance of the clamp.

[0034] The fixing device is provided with a hanging rod 2, which is fixed to the upper end of the vertical channel steel 1 by bolts, and the center point of the hanging rod 2 is located on the vertical center line of the vertical channel steel 1.

[0035] In this embodiment, the fixing device can provide a support point for lifting, allowing the lifting fixture to be flexibly mounted on the lifting rod 2 via the lifting ring 4, thereby achieving the lifting and suspension of the parts. The lifting rod 2 is fixed to the upper end of the vertical channel steel 1 by bolts, and the center point of the lifting rod 2 is located on the vertical centerline of the vertical channel steel 1. The structure and fixed position of the lifting rod 2 ensure balance during the lifting process, allowing the parts to be lifted and suspended smoothly.

[0036] In an optional embodiment, the suspension rod 2 may be made of high-strength alloy steel or titanium alloy to improve its load-bearing capacity and wear resistance.

[0037] The lifting fixture is provided with an inner clamping fixture 3 and a lifting ring 4 . The upper end of the inner clamping fixture 3 is fixedly connected to the lower end of the lifting ring 4 , and the lifting ring 4 is movably provided on the lifting rod 2 .

[0038] In this embodiment, the upper end of the inner clamping fixture 3 is fixedly connected to the lower end of the lifting ring 4, which contacts the part and provides clamping force, ensuring the stability of the part during lifting. The lifting ring 4 is movably mounted on the lifting rod 2, allowing the lifting fixture to move on the lifting rod 2 to lift and suspend the part. The lifting ring 4 makes the lifting process more flexible and convenient.

[0039] The clamping device is provided with a cylinder fixing frame 5, a three-axis cylinder with a guide rod 6, and a fixed clamping block 7. The cylinder fixing frame 5 is fixed to the wing plates on both sides of the vertical channel steel 1, the three-axis cylinder with a guide rod 6 is fixed above the cylinder fixing frame 5, and the fixed clamping block 7 is fixed to the piston rod of the three-axis cylinder with a guide rod 6. Among them, the fixed clamping block 7 can be a V-shaped clamping block.

[0040] In this embodiment, the cylinder mounting bracket 5 is fixed to the wing plates on either side of the vertical channel steel 1, providing mounting and support for the three-axis guide rod cylinder 6. The three-axis guide rod cylinder 6 is fixed above the cylinder mounting bracket 5. The piston rod of the three-axis guide rod cylinder 6 moves the fixed clamp 7 to clamp and position the lifting fixture. The fixed clamp 7 is fixed to the piston rod of the three-axis guide rod cylinder 6 and contacts the lifting fixture, providing clamping force and ensuring the stability of the part during high-altitude positioning.

[0041] In practice, the lifting fixture is connected to the part, the crane hook is inserted into the lifting ring 4, and the part is slowly lifted. The part is moved on the lifting rod 2 via the lifting fixture and the lifting ring 4 until it reaches the desired position. Once the part reaches the desired position, the clamping device is activated. The three-axis guide cylinder 6 is actuated, and the fixed clamp 7 is pressed against the corresponding part of the lifting fixture, clamping it firmly in place. This prevents external forces on the four sides of the part while ensuring high-altitude positioning of the part, facilitating subsequent precision testing and other operations.

[0042] Figure 2 The schematic diagram shows the structure of a vertical channel steel provided according to an embodiment of the present utility model.

[0043] like Figure 2 As shown, a mounting hole 8 is provided on the upper end of the web of the vertical channel steel 1, and one end of the hanger rod 2 is fixed in the mounting hole 8 by a bolt; fixing washers 9 are respectively provided on both sides of the mounting hole 8.

[0044] In this embodiment, mounting hole 8 is provided at the upper end of the web of vertical channel steel 1, providing a fixing point for hanger rod 2. Once fixed, hanger rod 2 is positioned at a suitable height, facilitating cooperation with the lifting ring 4 of the lifting fixture to facilitate lifting operations for hollow square tubular parts. Specifically, one end of hanger rod 2 is secured within mounting hole 8 by bolts, ensuring the stability and reliability of hanger rod 2 during use. The size and shape of mounting hole 8 should match the size of the bolts and hanger rod 2 to ensure secure fixation.

[0045] The fixing gasket 9 is located between the bolt and the web of the vertical channel steel 1, and plays a role in buffering and increasing friction. Specifically, the fixing gasket 9 can increase the contact area between the bolt and the web of the vertical channel steel 1, thereby improving the firmness of the fixation. During the lifting and clamping process, the suspension rod 2 will be subjected to various forces, and the fixing gasket 9 can prevent the bolt from loosening, ensuring that the suspension rod 2 always remains in the correct position. In addition, the fixing gasket 9 can reduce the direct pressure of the bolt on the web of the vertical channel steel 1, avoiding damage to the web due to the tightening of the bolts. Especially during long-term use, the fixing gasket 9 can extend the service life of the vertical channel steel 1.

[0046] Figure 3 The schematic diagram shows the structure of a suspension rod provided according to an embodiment of the present utility model.

[0047] like Figure 3 As shown, a limiting device is provided on the suspension rod 2 ; the limiting device is provided with a limiting bolt 10 and a limiting block 11 , and the suspension ring 4 is movably provided between the limiting bolt 10 and the limiting block 11 .

[0048] In this embodiment, a limit bolt 10 is mounted on the suspension rod 2 and works in conjunction with a limit block 11 to restrict the range of motion of the lifting ring 4 on the suspension rod 2. The position of the limit bolt 10 on the suspension rod 2 can be adjusted to accommodate different sizes of lifting rings 4 and lifting requirements. For example, the position of the limit bolt 10 can be adjusted based on the weight of the part and the lifting height to ensure that the lifting ring 4 does not separate from the suspension rod 2 during the lifting process, while also ensuring the stability of the part in the suspended state.

[0049] Optionally, the limit stopper 11 can be a conical stopper. The conical stopper can guide the lifting ring 4 to slide smoothly into the correct position, reducing friction and resistance during the lifting process; secondly, the conical stopper can prevent the lifting ring 4 from moving laterally during the lifting process to a certain extent, thereby improving the safety and stability of the lifting.

[0050] During the lifting process, the lifting ring 4 moves on the lifting rod 2. When the lifting ring 4 moves to the position between the limit bolt 10 and the limit block 11, the limit bolt 10 and the limit block 11 work together to limit the further movement of the lifting ring 4, ensuring that the lifting ring 4 does not separate from the lifting rod 2. At the same time, the limit device also prevents the lifting ring 4 from excessive shaking during the lifting process, ensuring the smooth lifting and suspension of the parts.

[0051] Figure 4 The schematic diagram shows the structure of a hanging ring provided according to an embodiment of the present utility model.

[0052] like Figure 4As shown, a limiting hole 12 is provided in the middle of the lifting ring 4, and a first fixing hole 13 and a second fixing hole 14 are provided on both sides of the limiting hole 12; the lifting ring 4 is movably provided on the hanging rod 2 through the limiting hole 12, and the lifting ring 4 is fixedly connected to the inner clamping fixture 3 through the first fixing hole 13.

[0053] In this embodiment, the size and shape of the limiting hole 12 match the suspension rod 2, so that the lifting ring 4 can be movably mounted on the suspension rod 2. Specifically, the diameter of the limiting hole 12 can be larger than the size of the suspension rod 2 so that the lifting ring 4 can slide freely on the suspension rod 2, thereby realizing the movement of the lifting fixture during the lifting process.

[0054] The first fixing hole 13 is used for fixed connection to the inner clamping fixture 3. Specifically, a wire rope can be used to connect the lifting ring 4 to the inner clamping fixture 3, ensuring that the two will not separate during the lifting process. This connection method effectively transmits the lifting force to the inner clamping fixture 3, thereby achieving the lifting of the part. The second fixing hole 14 can be used to connect to the crane hook.

[0055] During the lifting process, the lifting ring 4 is movably mounted on the suspension rod 2 through the stop hole 12. After the crane hook is inserted into the second fixing hole 14, the hook is slowly raised until the stop hole 12 and the suspension rod 2 are at the same level. The stop hole 12 is then inserted into the suspension rod 2. When the part reaches the predetermined position, the lifting fixture is clamped and positioned using the clamping device. At this point, the lifting ring 4 is fixed on the suspension rod 2, ensuring the stability of the part at high altitude.

[0056] Figure 5 The schematic diagram shows the structure of a cylinder fixing bracket provided according to an embodiment of the present utility model.

[0057] like Figure 5 As shown, the cylinder fixing frame 5 is provided with a first connecting plate 15 and a second connecting plate 16, and the first connecting plate 15 and the second connecting plate 16 are vertically arranged; the first connecting plate 15 is used to be fixedly connected to the wing plate of the channel steel, and the second connecting plate 16 is used to be fixedly connected to the three-axis guide rod cylinder 6.

[0058] In this embodiment, the cylinder mounting bracket 5 is composed of a first connecting plate 15 and a second connecting plate 16 arranged vertically. This vertical structural design enables the cylinder mounting bracket 5 to be firmly fixed to the wing plate of the vertical channel steel 1 and provides stable support for the three-axis guide rod cylinder 6.

[0059] The first connecting plate 15 is used to securely connect to the flange of the channel steel. In practice, multiple through-holes 17 are provided in the first connecting plate 15 to allow bolts and other fasteners to securely fasten it to the flange of the vertical channel steel 1. This ensures that the cylinder mounting bracket 5 does not loosen or shift during lifting and clamping. Furthermore, the through-holes 17 reduce the weight of the first connecting plate 15, lowering the deadweight of the entire positioning fixture and facilitating installation and operation.

[0060] The second connecting plate 16 is used to securely connect to the three-axis guide rod cylinder 6. Similarly, multiple through-holes 17 are provided on the second connecting plate 16 to allow the three-axis guide rod cylinder 6 to be secured thereto using fasteners such as bolts. This ensures that the three-axis guide rod cylinder 6 can function stably during operation, providing reliable power to the clamping device. Furthermore, through-holes 17 reduce the weight of the second connecting plate 16, thereby reducing the deadweight of the entire positioning fixture, facilitating installation and operation.

[0061] The cylinder mounting bracket 5 is connected to the flange of the vertical channel steel 1 via a first connecting plate 15, securing the clamping device to the support frame. Simultaneously, a second connecting plate 16 provides a stable mounting platform for the three-axis guide rod cylinder 6, enabling the cylinder to accurately clamp the lifting fixture.

[0062] Optionally, reinforcing ribs 18 are provided between the first connecting plate 15 and the second connecting plate 16. These ribs enhance the structural strength and stability of the cylinder mount 5. During the lifting and clamping process, the cylinder mount 5 is subjected to significant forces, and the ribs 18 effectively distribute these forces, preventing deformation or damage to the mount. Furthermore, the ribs 18 enhance the vibration resistance of the cylinder mount 5, reducing the impact of vibration on clamping accuracy.

[0063] A three-axis guide rod cylinder 6 is installed at each end of the second connecting plate 16. This design allows the lifting fixture to be clamped from two directions, increasing the stability and reliability of the clamp. When the lifting fixture needs to be clamped, the cylinders at both ends operate simultaneously, applying the clamping force more evenly and preventing the lifting fixture from shifting or becoming unbalanced during the clamping process.

[0064] In actual application, first, the inner clamping fixture 3 of the lifting fixture is connected and fixed to the hollow square tube-shaped part to be lifted, ensuring that the connection is firm and reliable and can bear the weight of the part. The crane hook is inserted into the second fixing hole 14 of the lifting fixture ring 4, and the lifting operation is ready.

[0065] During the lifting process, the lifting ring 4 is movably arranged on the lifting rod 2 through the limiting hole 12. After the crane hook is inserted into the second fixing hole 14, the hook is slowly raised until the limiting hole 12 is at the same level as the lifting rod 2. In this embodiment, it is assumed that the height of the lifting rod 2 is 5200 mm.

[0066] Then, the limiting hole 12 is sleeved on the conical stopper on the hanging rod 2 , and the hanging ring 4 is slowly slid from the conical stopper to the hanging rod 2 .

[0067] The limiting device consists of a limiting bolt 10 and a limiting block 11. The lifting ring 4 is movably arranged between the limiting bolt 10 and the limiting block 11 to prevent the lifting ring 4 from separating from the lifting rod 2 during the lifting process. At the same time, it also limits the excessive shaking of the lifting ring 4 to ensure the smooth lifting and suspension of the parts.

[0068] After the part is lifted to the desired position, the clamping device is activated. The three-axis guide rod cylinder 6 adjusts the height of the fixed clamp 7 so that it is at the same level as the lifting fixture. The three-axis guide rod cylinder 6 then adjusts the horizontal position of the fixed clamp 7 so that it abuts the front and rear clamping plates of the lifting fixture, clamping the lifting fixture in place.

[0069] In the description of this utility model, unless otherwise specified, "plurality" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed, or operate in a specific direction, and therefore should not be construed as limiting this utility model. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0070] The above is only a specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any modifications, equivalent replacements and improvements made by any technician familiar with this technical field within the technical scope disclosed by the present invention and within the spirit and principles of the present invention should be covered by the protection scope of the present invention.

Claims

1. A positioning fixture for hollow square tube parts, characterized in that: Includes support frame, fixing device, lifting fixture and clamping device; The support frame is provided with a vertical channel steel (1), an oblique support frame is fixed to one side of the web of the vertical channel steel (1), and the other side of the web of the vertical channel steel (1) is fixedly connected to the fixing device; The fixing device is provided with a hanging rod (2), and the hanging rod (2) is fixed to the upper end of the vertical channel steel (1) by bolts, and the center point of the hanging rod (2) is located on the vertical center line of the vertical channel steel (1); The lifting fixture is provided with an inner clamping fixture (3) and a lifting ring (4), the upper end of the inner clamping fixture (3) is fixedly connected to the lower end of the lifting ring (4), and the lifting ring (4) is movably provided on the lifting rod (2); The clamping device is provided with a cylinder fixing frame (5), a three-axis cylinder with a guide rod (6) and a fixed clamping block (7); the cylinder fixing frame (5) is fixed to the wing plates on both sides of the vertical channel steel (1); the three-axis cylinder with a guide rod (6) is fixed above the cylinder fixing frame (5); and the fixed clamping block (7) is fixed to the piston rod of the three-axis cylinder with a guide rod (6).

2. The positioning fixture according to claim 1, characterized in that: A mounting hole (8) is provided on the upper end of the web of the vertical channel steel (1), and one end of the suspension rod (2) is fixed in the mounting hole (8) by a bolt; fixing gaskets (9) are respectively provided on both sides of the mounting hole (8).

3. The positioning fixture according to claim 1, characterized in that: A limiting device is provided on the suspension rod (2); the limiting device is provided with a limiting bolt (10) and a limiting block (11); the suspension ring (4) is movably provided between the limiting bolt (10) and the limiting block (11).

4. The positioning fixture according to claim 3, characterized in that: The limit stopper (11) is a conical stopper.

5. The positioning fixture according to claim 1, characterized in that: A limiting hole (12) is provided in the middle of the lifting ring (4), and a first fixing hole (13) and a second fixing hole (14) are provided on both sides of the limiting hole (12); The lifting ring (4) is movably arranged on the lifting rod (2) through the limiting hole (12), and the lifting ring (4) is fixedly connected to the inner clamping fixture (3) through the first fixing hole (13).

6. The positioning fixture according to claim 1, characterized in that: The cylinder fixing frame (5) is provided with a first connecting plate (15) and a second connecting plate (16), and the first connecting plate (15) and the second connecting plate (16) are vertically arranged; The first connecting plate (15) is used for fixedly connecting to the wing plate of the channel steel, and the second connecting plate (16) is used for fixedly connecting to the three-axis guide rod cylinder (6).

7. The positioning fixture according to claim 6, characterized in that: A plurality of through holes (17) are provided on the first connecting plate (15) and the second connecting plate (16); and a reinforcing rib (18) is provided between the first connecting plate (15) and the second connecting plate (16).

8. The positioning fixture according to claim 6, characterized in that: The three-axis guide rod cylinder (6) is provided at both ends of the second connecting plate (16).

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