A rotation limiting mechanism

Abstract

The application discloses a rotation limiting mechanism, which comprises a supporting block, a reference block rotatably connected to the top of the supporting block, a supporting plate connected to the supporting block, a connecting rod one rotatably matched with the end of the reference block away from the supporting block, a connecting rod two rotatably matched with the connecting rod one, and a push rod rotatably connected to the supporting plate, the end of the connecting rod two away from the connecting rod one is rotatably connected to the top of the supporting plate, a limiting rod is rotatably connected between the connecting rod two and the push rod, and the limiting rod is provided with a limiting nose matched with the connecting rod two. The reference block is used for connecting an external pressing mechanism, the rotation of the push rod can sequentially drive the limiting rod, the connecting rod two, the connecting rod one and the reference block to rotate in linkage, the limiting nose of the limiting rod locks the connecting rod two and limits the rotation of the connecting rod two, the reference block and other components, and the locking and loosening of the whole rotation limiting mechanism can be realized by rotating the push rod, so that the external pressing mechanism on the reference block can press and loosen the T-shaped stringer, and the operation is simple and convenient.

Description

Technical Field

[0001] The invention relates to the technical field of aircraft accessory assembly, and in particular to a rotation limiting mechanism. Background Art

[0002] The angle piece of the large diameter thin wall cylindrical riveted part is suitable for fixing the middle frame of the riveted part. The fixing method of the middle frame is as follows: Figure 1 As shown, the fixed beams are T-beams, which are pre-installed on the angle piece riveting fixture. After the middle frame is installed and positioned, a G-type fixture is used to secure the angle pieces and T-beams. At the same time, rivet holes are drilled in the T-beams and riveted together. After the steel frame structure, including the angle pieces, T-beams, and end frames, is installed, the middle frame is assembled. The middle frame is aligned with the angle pieces on the T-beams, and rivet holes are drilled in the middle frame before being riveted together. Therefore, the installation of the middle frame of large-diameter, thin-walled cylindrical riveted components primarily involves securing and positioning the angle pieces.

[0003] Traditional corner piece assembly tooling (such as Figure 2 As shown in the figure, the traditional corner piece assembly tooling is completely tightened or loosened by the positioning bolts. When the positioning bolts are used for tightening or loosening, the positioning bolts need to be turned multiple times, which makes the operation cumbersome, time-consuming and labor-intensive, and also increases the time cost. Summary of the Invention

[0004] The object of the present invention is to provide a rotation limiting mechanism to solve the problem that the existing corner piece assembly tooling is complicated, time-consuming and labor-intensive to operate during compression and release.

[0005] The technical solution of the present invention to solve the above technical problems is as follows:

[0006] A rotation limiting mechanism comprises: a support block, a reference block rotatably connected to the top of the support block, a support plate connected to the support block, a first connecting rod rotatably engaged with an end of the reference block away from the support block, a second connecting rod rotatably engaged with the first connecting rod, and a push rod rotatably connected to the support plate, an end of the second connecting rod away from the first connecting rod rotatably connected to the top of the support plate, a limiting rod rotatably connected between the second connecting rod and the push rod, and the limiting rod is provided with a limiting nose engaged with the second connecting rod;

[0007] When the push rod rotates, it drives the limit rod, the second connecting rod, the first connecting rod and the reference block to rotate in sequence, and locks and releases the second connecting rod through the limit nose of the limit rod.

[0008] The reference block of the present invention is used to connect the external clamping mechanism, and a six-bar mechanism is formed by combining the support plate, connecting rod one, connecting rod two, reference block, limit rod and push rod. By driving the push rod to rotate around the support plate, the limit rod, connecting rod two, connecting rod one and the reference block are driven to rotate in conjunction. When the limit nose of the limit rod contacts the upper surface of the connecting rod two, the reference block rotates to a horizontal state, and at the same time, the external clamping mechanism on the reference block vertically clamps the T-beam. The push rod is further rotated and the limit nose of the limit rod is driven to lock the connecting rod two. After the limit rod locks the connecting rod two, the rotation of the push rod and the connecting rod two can be restricted, thereby restricting the rotation of the connecting rod one, the reference block and other components, and ensuring that the external clamping mechanism on the reference block is in a vertical clamping state on the T-beam; thereby, the clamping and loosening of the T-beam can be achieved by rotating the push rod, and the operation is simple, convenient, time-saving and labor-saving.

[0009] Furthermore, a rotation axis A is provided between the second connecting rod and the limiting rod, a rotation axis B is provided between the limiting rod and the push rod, and a rotation axis C is provided between the push rod and the support plate;

[0010] When the push rod rotates until the limit nose contacts the second connecting rod, the sum of the distances between the rotating axis A, the rotating axis B and the rotating axis C is greater than the distance between the rotating axis B and the rotating axis C;

[0011] The push rod continues to rotate until it is in the vertical direction. Under the action of elastic deformation, the sum of the distances between the rotation axis A, the rotation axis B, and the rotation axis C is equal to the distance between the rotation axis B and the rotation axis C, and the rotation axes A, B, and C are all on the same straight line.

[0012] The push rod continues to rotate, and after it continues to rotate and bypass the vertical direction under the action of elastic deformation, the limit nose locks the connecting rod 2 under the action of elastic deformation.

[0013] The push rod of the present invention rotates around the support plate and makes the reference block horizontal. At this time, the push rod approaches the vertical direction, the limit nose of the limit rod contacts the upper surface of the connecting rod 2, and the sum of the distances between the rotating axis A, the rotating axis B and the rotating axis C is greater than the distance between the rotating axis B and the rotating axis C. At this time, the limit rod does not lock the connecting rod 2, and the external clamping mechanism on the reference block vertically presses the T-shaped beam. Further push the push rod to rotate and make the push rod located in the vertical direction. Under the action of elastic deformation, the sum of the distances between the rotating shaft A, the rotating shaft B and the rotating shaft C is equal to the distance between the rotating shaft B and the rotating shaft C, and the rotating shaft A, the rotating shaft B and the rotating shaft C are all located on the same straight line. At this time, the connecting rod 2, the connecting rod 1 and the reference block do not rotate, and the limiting nose of the limiting rod limits the connecting rod 2 but does not lock it; continue to push the push rod to rotate and make the push rod bypass the above-mentioned vertical direction. When the push rod crosses the vertical direction, the elastically deformed component rebounds, causing the push rod to lock the connecting rod 2, thereby locking the entire mechanism. The entire locking process is simple and reliable.

[0014] Furthermore, the above-mentioned limiting nose and limiting rod are connected to form an integrated structure.

[0015] Furthermore, the limiting nose and the limiting rod are located in the same plane.

[0016] Furthermore, limit blocks for limiting the rotation position of the push rod are symmetrically provided on both sides of the support plate.

[0017] Furthermore, the reference block includes a base block 1, a base block 2, and a connecting plate connected between the base block 1 and the base block 2, the connecting plate is provided with a through slot, and an installation cavity for installing an external pressing mechanism is formed between the base block 1, the base block 2, and the connecting plate;

[0018] The side wall of the base block 1 away from the connecting plate is provided with a support ear that rotates with the top of the support block, and the side wall of the base block 2 away from the base block 1 is provided with a hinge seat that rotates with the connecting rod 1.

[0019] Furthermore, the connecting plate is connected to the base block 1 and the base block 2 to form an integrated structure.

[0020] The installation cavity formed between the base block 1, the base block 2 and the connecting plate of the present invention facilitates the installation of an external pressing mechanism.

[0021] Furthermore, the connecting rod 2 and the push rod are respectively provided with a rotation cavity for rotating the limit rod and the support plate. The end of the connecting rod 2 away from the connecting rod 1 passes through the rotation cavity of the push rod and is rotationally connected to the top of the support plate.

[0022] Furthermore, the length of the rotation cavity of the connecting rod 2 and the length of the rotation cavity of the push rod are both greater than the width of the support plate.

[0023] The present invention can save space by providing a rotation cavity on the push rod and the second connecting rod, and provides a suitable rotation space for the limiting rod to cooperate with the rotation of the push rod and the second connecting rod.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. The rotation limit mechanism of the present invention, the reference block is used to connect the external clamping mechanism, and a six-bar mechanism is formed by combining the support plate, connecting rod one, connecting rod two, the reference block, the limit rod and the push rod. By driving the push rod to rotate around the support plate, the limit rod, connecting rod two, connecting rod one and the reference block are driven to rotate in conjunction, and the limit rod is used to lock the connecting rod two, thereby limiting the rotation of the connecting rod two, connecting rod one, the reference block, the limit rod and the push rod. The rotation of the push rod can realize the locking and loosening of the entire rotation limit mechanism, thereby realizing the tightening and loosening of the T-shaped truss by the external clamping mechanism on the reference block, and the operation is simple and convenient.

[0026] 2. The rotation limiting mechanism of the present invention drives the push rod to rotate counterclockwise to lock the connecting rod 2 under slight elastic deformation; rotating the push rod clockwise can loosen the connecting rod 2, and cooperating with the limit block on the support plate can limit the rotation position of the push rod. The structure is reliable and the operation is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the structure of fixing the middle frame of a large-diameter thin-walled cylindrical riveted part;

[0028] Figure 2 This is a schematic cross-sectional view of a conventional corner piece assembly tool;

[0029] Figure 3 Schematic diagram of the overall structure of the rotation limiting mechanism;

[0030] Figure 4 Schematic diagram of the side structure of the rotation limiting mechanism;

[0031] Figure 5 Schematic diagram of the structure of the limit rod;

[0032] Figure 6 Schematic diagram of the structure when the limiting nose contacts the second connecting rod;

[0033] Figure 7 It is a structural diagram when the push rod rotates to the vertical direction;

[0034] Figure 8 It is a schematic diagram of the structure after the push rod rotates and bypasses the vertical direction;

[0035] Figure 9 It is a structural diagram of the rotation limiting mechanism in the vertically relaxed state.

[0036] In the figure: 71-support block, 72-reference block, 721-base block 1, 722-base block 2, 723-connecting plate, 7231-through groove, 724-support ear, 725-hinge seat, 73-support plate, 74-connecting rod 1, 75-connecting rod 2, 76-push rod, 77-limiting rod, 771-rotating shaft A, 772-rotating shaft B, 773-rotating shaft C, 774-limiting nose, 78-limiting block. DETAILED DESCRIPTION

[0037] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0038] like Figures 3 to 9As shown, the present invention provides a rotation limiting mechanism, including: a support block 71, a reference block 72 rotatably connected to the top of the support block 71, a support plate 73 connected to the support block 71, a connecting rod 1 74 rotatably engaged with the end of the reference block 72 away from the support block 71, a connecting rod 2 75 rotatably engaged with the connecting rod 1 74, and a push rod 76 rotatably connected to the support plate 73, wherein the reference block 72 is used to connect to an external clamping mechanism. Specifically, the reference block 72 includes a base block 1 721, a base block 2 722 and a connecting plate 723 connected between the base block 1 721 and the base block 2 722. The connecting plate 723 is connected to the base block 1 721 and the base block 2 722 to form an integrated structure; a through groove 7231 is provided on the connecting plate 723, and an installation cavity for installing an external clamping mechanism is formed between the base block 1 721, the base block 2 722 and the connecting plate 723; the side wall of the base block 1 721 away from the connecting plate 723 is provided with a support ear 724 that rotates with the top of the support block 71, and the side wall of the base block 2 722 away from the base block 1 721 is provided with a hinge seat 725 that rotates with the connecting rod 1 74.

[0039] The end of connecting rod 2 75 away from connecting rod 1 74 is rotatably connected to the top of support plate 73, and connecting rod 2 75 and push rod 76 are rotatably connected with limiting rod 77, and limiting rod 77 is provided with limiting nose 774 that cooperates with connecting rod 2 75. When push rod 76 rotates, it drives limiting rod 77, connecting rod 2 75, connecting rod 1 74 and reference block 72 to rotate in conjunction in turn, and locks and releases connecting rod 2 75 through limiting nose 774 of limiting rod 77. A six-bar mechanism is formed by combining the support plate 73, connecting rod 1 74, connecting rod 2 75, reference block 72, limiting rod 77 and push rod 76. By driving the push rod 76 to rotate around the support plate 73, the limiting rod 77, connecting rod 2 75, connecting rod 1 74 and reference block 72 can be driven to rotate in conjunction with each other, thereby adjusting the position of the external clamping mechanism on the reference block 72. By rotating the push rod 76, the T-shaped truss can be tightened or loosened, which is simple, convenient, time-saving and labor-saving to operate.

[0040] To save space and facilitate smooth rotation between the limiting rod 77, the push rod 76, and the second connecting rod 75, a rotation cavity is defined in the second connecting rod 75 and the push rod 76, respectively, for the limiting rod 77 and the support plate 73. To ensure smooth rotation around the support plate 73, the length of the rotation cavity of the second connecting rod 75 and the length of the rotation cavity of the push rod 76 are both greater than the width of the support plate 73. The end of the second connecting rod 75, away from the first connecting rod 74, passes through the rotation cavity of the push rod 76 and is rotatably connected to the top of the support plate 73. In this embodiment, the limiting nose 774 is connected to the limiting rod 77 as an integral structure, and the limiting nose 774 and the limiting rod 77 are located in the same plane.

[0041] In this embodiment, the support ear 724 in the reference block 72 and the top of the support block 71 are rotated by hinged connection, the connecting rod 1 74 and the hinge seat 725 in the reference block 72 are rotated by hinged connection, the connecting rod 2 75 and the connecting rod 1 74 are rotated by hinged connection, the connecting rod 2 75 and the top of the support plate 73 are rotated by hinged connection, the push rod 76 and the support plate 73 are rotated by hinged connection, and the two ends of the limit rod 77 are respectively rotated by hinged connection with the push rod 76 and the connecting rod 2 75; in other embodiments of the present invention, the above-mentioned rotation connection can also be achieved by means of shaft-hole matching, and no specific limitation is made here.

[0042] Stoppers 78 are symmetrically provided on both sides of the support plate 73 to limit the rotational position of the push rod 76. In this embodiment, the stoppers 78 are arranged obliquely on both sides of the support plate 73. When the push rod 76 rotates clockwise until it contacts the stoppers 78, the reference block 72 is vertically positioned as a whole, and the stoppers 78 are used to limit the rotational position of the push rod 76.

[0043] In the present invention, when the push rod 76 rotates, it drives the limit rod 77, the second connecting rod 75, the first connecting rod 74 and the reference block 72 to rotate in conjunction with each other, and the second connecting rod 75 is locked and loosened by the limit rod 77. The specific method of locking and loosening the second connecting rod 75 is as follows:

[0044] A rotation axis A771 is provided between the second connecting rod 75 and the limiting rod 77 , a rotation axis B772 is provided between the limiting rod 77 and the push rod 76 , and a rotation axis C773 is provided between the push rod 76 and the support plate 73 ;

[0045] When the push rod 76 is driven to rotate until the limiting nose 774 contacts the connecting rod 2 75, the sum of the distances between the rotating shaft A771 and the rotating shaft B772 and the rotating shaft C773 is greater than the distance between the rotating shaft B772 and the rotating shaft C773; when the limiting nose 774 contacts the connecting rod 2 75, the push rod 76 is close to the vertical direction, and the reference block 72 is in a horizontal state. The sum of the distances between the rotating shaft A771 and the rotating shaft B772 and the rotating shaft C773 is greater than the distance between the rotating shaft B772 and the rotating shaft C773, the limiting rod 77 does not lock the connecting rod 2 75, and the external clamping mechanism on the reference block 72 vertically presses the T-shaped beam.

[0046] Drive the push rod 76 to continue rotating so that the push rod 76 is located in the vertical direction. Under the action of elastic deformation, the sum of the distances between the rotating shaft A771, the rotating shaft B772 and the rotating shaft C773 is equal to the distance between the rotating shaft B772 and the rotating shaft C773, and the rotating shaft A771, the rotating shaft B772 and the rotating shaft C773 are all located on the same straight line. At this time, the connecting rod 2 75, the connecting rod 1 74 and the reference block 72 do not rotate.

[0047] The push rod 76 is further driven to continue rotating. After it continues rotating and bypasses the vertical direction under the action of elastic deformation, the limit nose 774 locks the connecting rod 2 75 under the action of elastic deformation; when the push rod 76 passes the vertical direction, the elastically deformed component rebounds, causing the push rod 76 to lock the connecting rod 2 75, thereby locking the entire mechanism. The entire locking process is simple and reliable.

[0048] In this embodiment, the clockwise and counterclockwise rotation directions of the push rod 76 are described based on the accompanying drawings and are not specifically limited here. They depend on actual use.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A rotation limiting mechanism, characterized in that: include: A support block (71), a reference block (72) rotatably connected to the top of the support block (71), a support plate (73) connected to the support block (71), a connecting rod (74) rotatably matched with the end of the reference block (72) away from the support block (71), a connecting rod (75) rotatably matched with the connecting rod (74), and a push rod (76) rotatably connected to the support plate (73), the end of the connecting rod (75) away from the connecting rod (74) is rotatably connected to the top of the support plate (73), a limiting rod (77) is rotatably connected between the connecting rod (75) and the push rod (76), and the limiting rod (77) is provided with a limiting nose (774) matched with the connecting rod (75); When the push rod (76) rotates, it drives the limiting rod (77), the second connecting rod (75), the first connecting rod (74) and the reference block (72) to rotate in sequence, and the second connecting rod (75) is locked and loosened through the limiting nose (774) of the limiting rod (77).

2. The rotation limiting mechanism according to claim 1, characterized in that: A rotation axis A (771) is provided between the second connecting rod (75) and the limiting rod (77), a rotation axis B (772) is provided between the limiting rod (77) and the push rod (76), and a rotation axis C (773) is provided between the push rod (76) and the support plate (73); When the push rod (76) rotates until the limiting nose (774) contacts the second connecting rod (75), the sum of the distances between the rotating axis A (771), the rotating axis B (772), and the rotating axis C (773) is greater than the distance between the rotating axis B (772) and the rotating axis C (773); The push rod (76) continues to rotate so that the push rod (76) is located in the vertical direction. Under the action of elastic deformation, the sum of the distances between the rotation axis A (771) and the rotation axis B (772) and the rotation axis C (773) is equal to the distance between the rotation axis B (772) and the rotation axis C (773), and the rotation axis A (771), the rotation axis B (772) and the rotation axis C (773) are all located on the same straight line; The push rod (76) continues to rotate, and after it continues to rotate and bypasses the vertical direction under the action of elastic deformation, the limiting nose (774) locks the second connecting rod (75) under the action of elastic deformation.

3. The rotation limiting mechanism according to claim 2, characterized in that: The limiting nose (774) is connected to the limiting rod (77) to form an integrated structure.

4. The rotation limiting mechanism according to claim 3, characterized in that: The limiting nose (774) and the limiting rod (77) are located in the same plane.

5. The rotation limiting mechanism according to claim 1, characterized in that: Limiting blocks (78) for limiting the rotational position of the push rod (76) are symmetrically provided on both sides of the support plate (73).

6. The rotation limiting mechanism according to any one of claims 1 to 5, characterized in that: The reference block (72) includes a base block 1 (721), a base block 2 (722), and a connecting plate (723) connected between the base block 1 (721) and the base block 2 (722), wherein a through slot (7231) is provided on the connecting plate (723), and an installation cavity for installing an external pressing mechanism is formed between the base block 1 (721), the base block 2 (722), and the connecting plate (723); The side wall of the base block 1 (721) away from the connecting plate (723) is provided with a support ear (724) that is rotatably matched with the top of the support block (71), and the side wall of the base block 2 (722) away from the base block 1 (721) is provided with a hinge seat (725) that is rotatably matched with the connecting rod 1 (74).

7. The rotation limiting mechanism according to claim 6, characterized in that: The connecting plate (723) is connected to the base block 1 (721) and the base block 2 (722) to form an integrated structure.

8. The rotation limiting mechanism according to claim 6, characterized in that: The connecting rod 2 (75) and the push rod (76) are respectively provided with a rotation cavity for the rotation of the limit rod (77) and the support plate (73). The end of the connecting rod 2 (75) away from the connecting rod 1 (74) passes through the rotation cavity of the push rod (76) and is rotatably connected to the top of the support plate (73).

9. The rotation limiting mechanism according to claim 8, characterized in that: The length of the rotating cavity of the second connecting rod (75) and the length of the rotating cavity of the push rod (76) are both greater than the width of the supporting plate (73).

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