An interlock structure for an automatic tilt device preventing arm twisting

Abstract

The utility model discloses an interlocking structure of automatic tilt ware anti -twist arm installation, specifically relates to the technical field of automatic tilt ware of helicopter, including paddle spindle, be provided with anti -twist arm fixed part on paddle spindle and be located between the locating assembly of paddle spindle and anti -twist arm fixed part, and anti -twist arm fixed part includes two locating rings, and the fastening mechanism is set to two locating rings outside, and the splicing component is set between two locating rings. The utility model discloses utilize the clamping of the clamping groove and the clamping bar between two locating rings and the plug -in cooperation of multiple supporting arms, bolt and bolt through -hole, guarantee anti -twist arm and paddle spindle rigid connection and transmission stable continuity, set up locating assembly simultaneously, utilize the clamping of multiple locating beads and two locating ring inner surface grooving and form the torsion constraint, even multiple point dispersed stress, make both sustained effective transmission.

Description

Technical Field

[0001] This utility model relates to the field of helicopter automatic tilting device technology, and more specifically, to an interlocking structure for installing an anti-torsion arm of an automatic tilting device. Background Technology

[0002] The anti-torsion arm of the autoswashplate is a key safety component in the autoswashplate mechanism. Its core function is to prevent the "stationary ring" of the autoswashplate from rotating unexpectedly without command due to internal friction or vibration. It ensures that the "stationary reference" of the entire control system is absolutely stable. In this way, the pilot's control commands can be transmitted completely and accurately to the rotating ring, without being "swallowed" or "distorted" during the transmission due to reference drift. Although the anti-torsion arm is inconspicuous, it maintains the purity of control command transmission and ensures the safety and control quality of helicopter flight.

[0003] In actual use, the anti-torsion arm and the blade main shaft are generally locked together with bolts and anti-reverse nuts. The clamping force after locking locks the anti-torsion arm and the blade main shaft to achieve a rigid connection. This method has a risk: if the bolt and nut loosen, or even if they loosen but do not fall off, the anti-torsion arm and the blade main shaft will not be able to lock together, the rigid connection will fail, and the stationary ring may slip or wobble, affecting flight safety. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides an interlocking structure for the installation of an anti-torsion arm of an automatic tilter, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: An interlocking structure for installing an anti-torsion arm on an automatic tilter includes a blade main shaft, an anti-torsion arm fixing part on the blade main shaft, and a positioning assembly between the blade main shaft and the anti-torsion arm fixing part. The anti-torsion arm fixing part includes two positioning rings, a fastening mechanism on the outer side of the two positioning rings, and a splicing assembly between the two positioning rings. The splicing assembly splices the two positioning rings onto the blade main shaft, the positioning assembly provides multi-point positioning for the two positioning rings and the blade main shaft, and the fastening mechanism connects the blade main shaft and the two positioning rings.

[0006] As a further description of the above technical solution: the fastening mechanism includes support arms fixedly connected to both ends of the two positioning rings, and each of the support arms has two bolt holes 1. The two positioning rings have radial through holes coaxial with the bolt holes 2. Multiple bolts are arranged through the support arms. The multiple bolts are symmetrically distributed on both sides of the two positioning rings. Bolt through holes for the bolts to pass through are opened on both sides of the blade main shaft surface. The splicing assembly includes a locking rod 1 fixedly connected to one end of the two positioning rings, and the other end of the two positioning rings has a locking groove 1 for locking the locking rod 1. The locking rod 1 has a "T" shaped cross section. The two positioning rings have a locking rod 2 fixedly connected to one end, and the other end of the two positioning rings has a locking groove 2 for locking the locking rod 2. The locking rod 2 has a "T" shaped cross section.

[0007] As a further description of the above technical solution: the positioning component includes multiple slots formed on the surface of the blade main shaft, and multiple sets of positioning beads are fixedly connected to the surfaces of the two positioning rings. The multiple sets of positioning beads cooperate with the slots and are configured to disperse the stress between the blade main shaft and the two positioning rings.

[0008] The technical effects and advantages of this utility model are as follows: 1. By setting up a fastening mechanism and splicing components, compared with the existing technology, the interlocking of the slot 1, the rod 1, the slot 2 and the rod 2 between the two positioning rings, combined with the insertion and cooperation of multiple support arms, bolts and bolt through holes, can further ensure the rigid connection between the anti-torsion arm and the blade main shaft, and further ensure the stable continuity of the transmission between the anti-torsion arm and the blade main shaft. 2. By setting up a positioning component, compared with the existing technology, multiple positioning beads are used to interlock with multiple slots on the inner surface of the two positioning rings, so that a torsional constraint is formed between the blade main shaft and the two positioning rings, thereby dispersing the stress on the blade main shaft and the two positioning rings evenly and at multiple points, so that the anti-torsion arm and the blade main shaft can maintain effective transmission continuously. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0010] Figure 2 This is a schematic diagram of the top structure of this utility model.

[0011] Figure 3 This is a schematic diagram of the propeller main shaft structure of this utility model.

[0012] Figure 4 This is a partial schematic diagram of the connection between the positioning ring and the support arm of this utility model.

[0013] Figure 5This is a partial schematic diagram of the connection between the positioning ring and the positioning bead of this utility model.

[0014] Figure 6 This is a partial schematic diagram of the connection between the positioning ring and the locking rod of this utility model.

[0015] The attached diagram is labeled as follows: 1. Blade main shaft; 2. Positioning ring; 3. Support arm; 4. Bolt; 5. Bolt through hole; 6. Slot; 7. Positioning bead; 8. Slot 1; 9. Rod 1; 10. Slot 2; 11. Rod 2. Detailed Implementation

[0016] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0017] Example 1: The embodiments disclosed in this application are as follows: Figures 1-6 The diagram shows an interlocking structure for installing an anti-torsion arm on an automatic tilter, comprising a blade main shaft 1, an anti-torsion arm fixing part on the blade main shaft 1, and a positioning assembly between the blade main shaft 1 and the anti-torsion arm fixing part; the anti-torsion arm fixing part includes two positioning rings 2, a fastening mechanism on the outer side of the two positioning rings 2, and a splicing assembly between the two positioning rings 2; the splicing assembly splices the two positioning rings 2 onto the blade main shaft 1, the positioning assembly provides multi-point positioning for the two positioning rings 2 and the blade main shaft 1, and the fastening mechanism connects the blade main shaft 1 and the two positioning rings 2; The fastening mechanism includes support arms 3 that are fixedly connected to both ends of two positioning rings 2. Each of the support arms 3 has two bolt holes 1. The two positioning rings 2 have radial through holes coaxial with the bolt holes as bolt holes 2. Multiple bolts 4 are arranged through the support arms 3. The multiple bolts 4 are symmetrically distributed on both sides of the two positioning rings 2. Bolt through holes 5 for the bolts 4 to pass through are opened on both sides of the surface of the blade main shaft 1. The splicing assembly includes a locking rod 9 fixedly connected to one end of two positioning rings 2, and a locking groove 8 for locking the locking rod 9 is opened at the other end of each of the two positioning rings 2. The locking rod 9 has a "T" shaped cross section. A locking rod 11 is fixedly connected to one end of each of the two positioning rings 2, and a locking groove 10 for locking the locking rod 11 is opened at the other end of each of the two positioning rings 2. The locking rod 11 has a "T" shaped cross section.

[0018] The implementation principle of this embodiment is as follows: the slots 8 and 10 at both ends of the two positioning rings 2 are slidably engaged with the rods 9 and 11 at the other end of the two positioning rings 2, so that the two positioning rings 2 are initially spliced ​​into a whole. Then, the multiple sets of positioning beads 7 on the inner surface of the two positioning rings 2 are aligned with the multiple slots 6 on the surface of the blade main shaft 1, and the bolt holes 2 at the ends of the two positioning rings 2 are aligned with the bolt through holes 5 on both sides of the surface of the blade main shaft 1. The two positioning rings 2 are fully inserted into the end of the blade main shaft 1, so that the multiple sets of positioning beads 7 on the inner surface of the two positioning rings 2 are assembled with the multiple slots 6. Next, insert multiple bolts 4 into the bolt holes 1 in the support arms 3 on both sides of the two positioning rings 2. It should be noted that when two of the bolts 4 pass through the bolt holes 1 in the support arms 3 on both sides of the two positioning rings 2, the two bolts 4 will also pass through the bolt hole 2 and the bolt through hole 5 between the two positioning rings 2. Then, use anti-loosening nuts to lock and fix the multiple bolts 4, so that the two positioning rings 2 and the blade main shaft 1 are further restricted and positioned by two of the bolts 4. It is worth noting that bolt 4 and bolt through hole 5 adopt a clearance fit, and axial locking is achieved by the preload of anti-loosening nuts at both ends; the anti-loosening nuts adopt self-locking nuts or add cotter pins to prevent loosening. As long as bolt 4 does not fall off, the rigid connection between the anti-torsion arm and the blade main shaft 1 can continue to be maintained.

[0019] Example 2: Based on Embodiment 1, this embodiment discloses an interlocking structure for the installation of the anti-torsion arm of an automatic tilter, referring to... Figure 1 , Figure 3 , Figure 4 and Figure 5 As shown, the positioning assembly includes multiple slots 6 formed on the surface of the blade main shaft 1, and multiple sets of positioning beads 7 are fixedly connected to the surfaces of the two positioning rings 2. The multiple sets of positioning beads 7 cooperate with the slots 6 and are configured to disperse the stress between the blade main shaft 1 and the two positioning rings 2. The implementation principle of this embodiment is as follows: when the blade main shaft 1 and the two positioning rings 2 are connected, the multiple sets of positioning beads 7 on the surface of the two positioning rings 2 are interlocked with the multiple slots 6 on the surface of the blade main shaft 1, so that the stress between the two sets of positioning rings 2 and the blade main shaft 1 can be evenly distributed to the multiple slots 6, so that the transmission between the blade main shaft 1 and the two positioning rings 2 remains stable.

[0020] The working principle of this utility model is as follows: two positioning rings 2 are spliced ​​onto the blade main shaft 1 by the splicing component, the positioning component positions the two positioning rings 2 and the blade main shaft 1 at multiple points, and then the fastening mechanism connects the blade main shaft 1 and the two positioning rings 2.

[0021] All contents not described in detail in the specification are existing technologies known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited; conventional equipment can be used. Electrical control components not mentioned in this technical solution are not shown in the figures because they are existing technologies, and will not be described here.

[0022] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An interlocking structure for installing an anti-torsion arm of an automatic tilter, comprising a blade main shaft (1), characterized in that: The blade main shaft (1) is provided with an anti-torsion arm fixing part and a positioning component provided between the blade main shaft (1) and the anti-torsion arm fixing part; The anti-torsion arm fixing part includes two positioning rings (2), a fastening mechanism is provided on the outside of the two positioning rings (2), and a splicing component is provided between the two positioning rings (2); The two positioning rings (2) are spliced ​​onto the blade main shaft (1) by the splicing assembly. The positioning assembly positions the two positioning rings (2) and the blade main shaft (1) at multiple points. Then, the fastening mechanism connects the blade main shaft (1) and the two positioning rings (2).

2. The interlocking structure for the installation of the anti-torsion arm of the automatic tilter according to claim 1, characterized in that: The fastening mechanism includes support arms (3) that are fixedly connected to both ends of the two positioning rings (2), and each of the support arms (3) has two bolt holes. The two positioning rings (2) have radial through holes coaxial with the bolt holes as bolt holes.

3. The interlocking structure for installing the anti-torsion arm of the automatic tilter according to claim 2, characterized in that: Multiple bolts (4) are provided through the multiple support arms (3), and the multiple bolts (4) are symmetrically distributed on both sides of the two positioning rings (2).

4. The interlocking structure for installing the anti-torsion arm of the automatic tilter according to claim 3, characterized in that: Both sides of the blade main shaft (1) are provided with bolt through holes (5) for the bolts (4) to pass through.

5. The interlocking structure for the installation of the anti-torsion arm of the automatic tilter according to claim 1, characterized in that: The splicing assembly includes a locking rod (9) fixedly connected to one end of two positioning rings (2), and the other end of the two positioning rings (2) is provided with a slot (8) for locking the locking rod (9), and the cross section of the locking rod (9) is "T" shaped.

6. The interlocking structure for installing the anti-torsion arm of the automatic tilter according to claim 1, characterized in that: One end of each of the two positioning rings (2) is fixedly connected to a second locking rod (11), and the other end of each of the two positioning rings (2) is provided with a second locking groove (10) for locking the second locking rod (11). The second locking rod (11) has a "T" shaped cross section.

7. The interlocking structure for the installation of the anti-torsion arm of the automatic tilter according to claim 1, characterized in that: The positioning component includes multiple slots (6) formed on the surface of the blade main shaft (1), and multiple sets of positioning beads (7) are fixedly connected to the surfaces of the two positioning rings (2).

8. The interlocking structure for the anti-torsion arm installation of the automatic tilter according to claim 7, characterized in that: The multiple sets of positioning beads (7) are matched with the slot (6) to disperse the stress between the blade main shaft (1) and the two positioning rings (2).

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