Self-adaptive radial and axial composite deformation transmission shaft

Abstract

The invention relates to a transmission shaft self-adaptive to radial and axial composite deformation, and belongs to the field of transmission. The transmission shaft comprises a left transmission shaft, a first connecting sleeve, a connecting sleeve and a right transmission shaft; a right product is fixedly connected to one end of the connecting sleeve through a right transmission shaft; one end of the left transmission shaft is connected with the first connecting sleeve through a spline; the first connecting sleeve is fixedly connected with the other end of the connecting sleeve; the left transmission shaft is coaxial with the left product; the right transmission shaft, the first connecting sleeve, the connecting sleeve and the right product are coaxial; the left transmission shaft can move back and forth in the first connecting sleeve and rotate so as to adapt to axis displacement changes between a left product and a right product which are connected to the two ends.

Description

Technical Field

[0001] This invention relates to a transmission shaft with adaptive radial and axial composite deformation, belonging to the field of transmission. Background Technology

[0002] To meet the high load-bearing capacity requirements of new aircraft, the aircraft doors need to be relatively long, typically requiring multiple actuators to operate simultaneously. To accommodate this structure, a long drive system is necessary. Because the aircraft fuselage deforms in multiple directions under aerodynamic loads, the drive system must adapt to these deformations to ensure safe and reliable operation of the actuation system. This typically involves connecting multiple rotary actuators with drive shafts, which must be capable of adapting to multi-directional deformation. Currently, drive shafts usually employ rigid connection structures or universal joint structures, which suffer from limitations such as inability to deform, structural complexity, low axial compression, and installation difficulties, all of which fail to meet system requirements. Summary of the Invention

[0003] Purpose of the invention: To provide a transmission shaft with adaptive radial and axial composite deformation, solving the problems of non-deformability, complex structure, small axial compression, and difficult installation.

[0004] Technical solution: A drive shaft that adapts to combined radial and axial deformation is provided, comprising: a left drive shaft, a first connecting sleeve, a connecting tube, and a right drive shaft; The product on the right is fixedly connected to one end of the connecting sleeve via the right drive shaft; one end of the left drive shaft is connected to the first connecting sleeve via a spline, and the other end is fitted with the left product; the first connecting sleeve is fixedly connected to the other end of the connecting sleeve; the left drive shaft and the left product are coaxial, and the right drive shaft, the first connecting sleeve, the connecting sleeve, and the right product are coaxial; The left drive shaft can move back and forth and rotate within the first connecting sleeve to accommodate changes in axial displacement between the left and right products at both ends of the connection.

[0005] Furthermore, the left drive shaft is equipped with a drum-shaped spline, and the first connecting sleeve is equipped with a spur spline; the drum-shaped spline and the spur spline work together to enable the left drive shaft to move back and forth and rotate within the first connecting sleeve.

[0006] Furthermore, it also includes: a first end cap, a spring, and a second end cap; A drum-shaped spline is inserted into the first connecting sleeve. The first end cap and the second end cap cover the insertion end face of the first connecting sleeve and avoid the left drive shaft, so as to prevent the left drive shaft from slipping out. The spring is located between the first end cover and one end of the left drive shaft, and also between the second end cover and one end of the left drive shaft.

[0007] Furthermore, the first end cap and the second end cap are two semi-circular parts.

[0008] Furthermore, the drive shaft also includes: a first bolt, a first hexagonal nut, a first pin, and a first washer; An interface is provided at one end of the left drive shaft. The left product is inserted into the interface and secured to the left drive shaft and the left product by the first bolt, the first hexagonal nut, the first pin, and the first washer.

[0009] Furthermore, the drive shaft also includes: a second bolt, a second hexagonal nut, a second pin, and a second washer; An interface is provided at one end of the right drive shaft. The right product is inserted into the interface and secured to the right drive shaft and the right product by a second bolt, a second hexagonal nut, a second pin, and a second washer.

[0010] Furthermore, the two ends of the connecting sleeve are radially fixed to the first connecting sleeve and the second connecting sleeve by rivets.

[0011] Furthermore, when the rotation axes of the left and right products are not aligned, the axis of the drum-shaped spline on the left drive shaft swings within the spur spline of the first connecting sleeve in a conical space with a certain angle, in order to adapt to the changes in the rotation axes of the left and right products and ensure normal load transmission.

[0012] Beneficial effects: This invention employs a flexible connection configuration, achieving the required displacement and axial position changes for the flexible connection between two products. This technology can be applied to all systems requiring a drive shaft connection between two actuators. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of a transmission shaft that adapts to combined radial and axial deformation.

[0014] Figure 2 This is a schematic diagram of a drive shaft that adapts to changes in the axis of the left and right connected products by adaptive radial and axial composite deformation.

[0015] Among them, 1-left side product, 2-first bolt, 3-first hexagonal nut, 4-first pin, 5-first washer, 6-left side drive shaft, 7-spring, 8-first connecting sleeve, 9-connecting sleeve, 10-rivet, 11-right side drive shaft, 12-second bolt, 13-second hexagonal nut, 14-second pin, 15-second washer, 16-right side product, 17-first end cap, 18-second end cap. Detailed Implementation

[0016] This invention proposes a transmission shaft with adaptive radial and axial combined deformation, such as... Figure 1As shown, it includes a first bolt 2, a first hexagonal nut 3, a first pin 4, a first washer 5, a left drive shaft 6, a spring 7, a first connecting sleeve 8, a connecting sleeve 9, a rivet 10, a right drive shaft 11, a second bolt 12, a second hexagonal nut 13, a second pin 14, a second washer 15, a first end cap 17, and a second end cap 18.

[0017] The left drive shaft 6 is a drum-shaped spline, and the first connecting sleeve 8 is a straight-tooth spline. The left drive shaft 6 can move within the tapered space of the first connecting sleeve 8 in the left-right, up-down and vertical directions, and can adapt to the axial displacement changes between the left product 1 and the right product 16 at both ends.

[0018] Spring 7 is installed between end cover 17 and left drive shaft 6 to ensure that the drive shaft automatically retracts during installation, making it convenient for installation in confined spaces. During operation, it bears axial loads and avoids rigid contact between parts to prevent them from bearing impact loads.

[0019] Please see Figure 1 and Figure 2 The adaptive radial-axial composite deformation transmission shaft of this invention includes a first bolt 2, a first hexagonal nut 3, a first pin 4, a first washer 5, a left transmission shaft 6, a spring 7, a first connecting sleeve 8, a connecting tube 9, a rivet 10, a right transmission shaft 11, a second bolt 12, a second hexagonal nut 13, a second pin 14, a second washer 15, a first end cap 17, and a second end cap 18. The left product 1 and the left transmission shaft 6 are connected by a spline. The spline connection between the left product 1 and the left transmission shaft 6 has upper and lower radial through holes, and is bolted and fixed by the first bolt 2, the first hexagonal nut 3, the first pin 4, and the first washer 5 to prevent the left product 1 and the left transmission shaft 6 from moving or disengaging. The left transmission shaft 6 is connected to the first connecting sleeve 8 by a spline. The first end cap 17 and the second end cap 18 are two semi-circular parts, respectively threaded to the first connecting sleeve 8 to prevent the left transmission shaft 6 from slipping out. The left drive shaft 6 is a drum-shaped spline, and the first connecting sleeve 8 is a straight-tooth spline. The left drive shaft 6 can move within the conical space of the first connecting sleeve 8 in the left-right, up-down, and vertical directions. Figure 2 The curve represents the moved left drive shaft 6, which can accommodate changes in axial displacement between the left product 1 and the right product 16 at both ends (there is a difference in axial distance A between the left and right product axes). A spring 7 is installed between the first connecting sleeve 8 and the left drive shaft 6, ensuring that the drive shaft automatically retracts during installation, facilitating installation in confined spaces, and bearing axial loads during operation, preventing rigid contact of parts from bearing impact loads. The first connecting sleeve 8, the right drive shaft 11, and the connecting sleeve 9 are radially riveted together by rivets 10 to prevent axial movement.

[0020] The right-side product 16 and the right-side drive shaft 11 are connected by a spline. There are upper and lower radial through holes at the spline connection between the right-side product 16 and the right-side drive shaft 11. They are bolted together and fixed by the second bolt 12, the second hexagonal nut 13, the second pin 14, and the second washer 15 to prevent the left-side product 1 and the left-side drive shaft 6 from moving and becoming detached.

[0021] The working process of the adaptive radial-axial composite deformation transmission shaft of the present invention is as follows: When installing the drive shaft with the left and right side products: Manually push the left drive shaft 6 to the right along the inner spline of the first connecting sleeve 8. After placing the drive shaft into the left product 1 and the right product 16, engage the inner spline of the right drive shaft 11 with the outer spline of the right product 16, ensuring that the radial through holes at the splines of the right drive shaft 11 and the right product 16 are aligned. Then, bolt the right drive shaft 11 and the right product 16 together and fix them in place using the second bolt 12, the second hexagonal nut 13, the second pin 14, and the second washer 15. Afterward, axially pull the left drive shaft 6 to the left along the inner spline of the first connecting sleeve 8, ensuring that the radial through holes at the splines of the left product 1 and the left drive shaft 6 are aligned. Bolt the left drive shaft 6 and the left product 1 together and fix them in place using the first bolt 2, the first hexagonal nut 3, the first pin 4, and the first washer 5.

[0022] When the product is working: When the axial displacement between the left product 1 and the right product 16 decreases, the left drive shaft 6 moves to the right along the inner spline of the first connecting sleeve 8, thereby reducing the connection distance of the entire drive shaft to ensure normal load transmission. When the axial displacement between product 1 on the left and product 16 on the right increases, the left drive shaft 6 moves to the left along the inner spline of the first connecting sleeve 8, and the compression spring 7 increases the connection distance of the entire drive shaft to ensure normal load transmission.

[0023] Please see Figure 2 When the rotation axes of the left product 1 and the right product 16 are not aligned (there is a distance A), the axis of the drum-shaped spline on the left drive shaft 6 swings within the conical space of the first connecting sleeve 8 at a certain angle to adapt to the changes in the rotation axes of the left product 1 and the right product 16, ensuring normal load transmission.

[0024] This invention provides a drive shaft that adapts to combined radial and axial deformation, enabling reliable connection and normal load transmission when the drive shaft is telescopically installed and in operation, adapting to the elongation or shortening of the distance between the left and right products and the difference in the axial position.

[0025] In summary, an adaptive radial-axial composite deformation transmission shaft is proposed, which solves the problem that rigid transmission shafts cannot adapt to changes in distance and axial displacement between connected products.

Claims

1. A transmission shaft with adaptive radial and axial composite deformation, characterized in that, include: Left drive shaft (6), first connecting sleeve (8), connecting sleeve (9), right drive shaft (11); The right-side product is fixedly connected to one end of the connecting sleeve (9) via the right-side drive shaft (11); one end of the left-side drive shaft is connected to the first connecting sleeve (8) via a spline, and the other end is fitted with the left-side product; the first connecting sleeve (8) is fixedly connected to the other end of the connecting sleeve (9); the left-side drive shaft and the left-side product are coaxial, and the right-side drive shaft (11), the first connecting sleeve (8), the connecting sleeve (9) and the right-side product are coaxial; The left drive shaft can move back and forth and rotate within the first connecting sleeve (8) to accommodate the axial displacement changes between the left and right products at both ends of the connection.

2. The drive shaft according to claim 1, characterized in that, The left drive shaft is equipped with a drum-shaped spline, and the first connecting sleeve is equipped with a straight-tooth spline. The drum-shaped spline and the straight-tooth spline work together to enable the left drive shaft to move back and forth and rotate within the first connecting sleeve (8).

3. The drive shaft according to claim 1, characterized in that, Also includes: First end cap (17), spring (7), and second end cap (18); The drum-shaped spline is inserted into the first connecting sleeve (8), and the first end cap (17) and the second end cap (18) cover the insertion end face of the first connecting sleeve (8) and avoid the left drive shaft (6) to prevent the left drive shaft (6) from slipping out. The spring (7) is located between the first end cover (17) and one end of the left drive shaft, and also between the second end cover (18) and one end of the left drive shaft.

4. The drive shaft according to claim 3, characterized in that, The first end cap (17) and the second end cap (18) are two half-circle parts.

5. The drive shaft according to claim 1, characterized in that, The drive shaft also includes: a first bolt (2), a first hexagonal nut (3), a first pin (4), and a first washer (5); An interface is provided at one end of the left drive shaft. The left product is inserted into the interface and fastened to the left drive shaft and the left product through the first bolt (2), the first hexagonal nut (3), the first pin (4), and the first washer (5).

6. The drive shaft according to claim 1, characterized in that, The drive shaft also includes: a second bolt (12), a second hexagonal nut (13), a second pin (14), and a second washer (15); An interface is provided at one end of the right drive shaft. The right product is inserted into the interface and fastened to the right drive shaft and the right product by means of the second bolt (12), the second hexagonal nut (13), the second pin (14), and the second washer (15).

7. The drive shaft according to claim 1, characterized in that, The two ends of the connecting sleeve (9) are radially fixed to the first connecting sleeve (8) and the second connecting sleeve (11) by rivets.

8. The drive shaft according to claim 2, characterized in that, When the rotation axes of the left and right products are not aligned, the axis of the drum-shaped spline on the left drive shaft swings within the conical space of the spur spline in the first connecting sleeve at a certain angle to adapt to the changes in the rotation axes of the left and right products and ensure normal load transmission.

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