A dual input single output bi-directional transmission coupling device

Abstract

The application relates to a double-input single-output bidirectional transmission coupling device, which belongs to the technical field of transmission equipment and comprises coaxially arranged first and second input shafts and an output shaft. A plurality of connecting assemblies are arranged on the output shaft and comprise two inclined support blocks arranged in the circumferential direction, the bottom of the inclined support block is rotationally connected with the outer circular surface of the output shaft, the rotation axis is parallel to the axis of the output shaft, the inclined support block can be pressed against or separated from the first output shaft by rotating around the rotation axis, and the first input shaft and the output shaft are connected and disconnected. The second input shaft is provided with a plurality of convex claws, the convex claws extend into the space between the output shaft and the first output shaft and are located between the two inclined support blocks of the corresponding connecting assembly, the inclined support blocks can be separated from the first input shaft and drive the output shaft to rotate when being actively rotated, and the power source of the output shaft is switched from the first input shaft to the second input shaft. The application can solve the technical problems that the existing coupling device cannot simultaneously meet the requirements of automatic switching, bidirectional transmission and small size and weight.

Description

Technical Field

[0001] This invention relates to the field of transmission equipment technology, specifically a dual-input single-output bidirectional transmission connection device. Background Technology

[0002] In an aircraft's actuation system, upon receiving commands from the pilot or the aircraft control system, corresponding components such as ailerons, elevators, and rudders are typically driven bidirectionally via electric motors, actuators, and gearboxes to adjust and control the aircraft's attitude. If an electric motor malfunctions or a gearbox jams during flight, it can cause difficulties in adjusting the aircraft's attitude, affecting flight safety.

[0003] To ensure flight safety, a backup motor is required to quickly switch to the backup power source in case of active power source failure. Therefore, a dual-input, single-output coupling device is needed to connect the two power sources to the output. This coupling device must not only enable automatic power source switching but also operate reliably in both directions. Furthermore, it must have a simple structure, occupy little space, and meet aircraft weight requirements. Existing bidirectional coupling devices cannot meet these requirements. Summary of the Invention

[0004] The purpose of this invention is to provide a dual-input single-output bidirectional transmission connection device that can solve the technical problem that existing connection devices cannot simultaneously meet the requirements of automatic switching, bidirectional transmission, and small size and weight.

[0005] To achieve the above objectives, the present invention adopts the following technical solution.

[0006] A dual-input single-output bidirectional transmission connection device includes a first input shaft 1, a second input shaft 2, and an output shaft 3 arranged coaxially.

[0007] The output shaft 3 is provided with a plurality of connecting components evenly distributed along its circumference. The connecting components can engage or disengage with the inner wall of the shaft hole of the first input shaft 1, thereby enabling the connection and disconnection of the first input shaft 1 and the output shaft 3.

[0008] The second input shaft 2 can separate the connecting component from the inner wall of the shaft hole of the first input shaft 1 when it rotates actively, and drive the output shaft 3 to rotate, so as to switch the power source of the output shaft 3 from the first input shaft 1 to the second input shaft 2.

[0009] Furthermore, the connecting assembly is located between the output shaft 3 and the shaft hole of the first input shaft 1, including two inclined support blocks 41 arranged circumferentially along the output shaft 3. The bottom of the inclined support block 41 is rotatably connected to the outer circular surface of the output shaft 3 and the axis of rotation is parallel to the axis of the output shaft 3. The inclined support block 41 can rotate around the axis of rotation to press or separate its top from the inner wall of the shaft hole of the first output shaft 3.

[0010] The effective height of the inclined support block 41 is greater than the distance between the outer circle of the output shaft 3 and the shaft hole of the first output shaft 3. The tops of the two inclined support blocks 41 in the same connecting assembly are offset to one side away from each other, so as to realize the bidirectional rotation of the first input shaft 1 driving the output shaft 3.

[0011] Furthermore, the second input shaft 2 is provided with a plurality of axially extending claws 21 at one end near the output shaft 3. The number of claws 21 is consistent with the number of connecting components and corresponds one-to-one. The claws 21 extend into the outer circle of the output shaft 3 and the shaft hole of the first output shaft 3 and are located between the two inclined support blocks 41 of the corresponding connecting components.

[0012] When the second input shaft 2 rotates actively, the top of the pawl 21 can push the top of the inclined support block 41 in the direction of rotation, so that the inclined support block 41 rotates around its rotation axis until the top separates from the inner wall of the shaft hole of the first input shaft 1. Then the bottom of the pawl 21 contacts the bottom of the corresponding inclined support block 41. The second input shaft 2 drives the output shaft 3 to rotate by pushing the inclined support block 41 in the direction of rotation through the pawl 21.

[0013] Furthermore, the connecting assembly also includes an elastic component 42 for keeping the top of the diagonal brace 41 pressed against the inner wall of the shaft hole of the first input shaft 1. When the second input shaft 2 rotates actively, the pawl 21 can cause the diagonal brace 41 in front of the rotation to overcome the elastic force of the elastic component 42 and separate from the inner wall of the shaft hole of the first input shaft 1.

[0014] Furthermore, the outer circular surface of the output shaft 3 is provided with an arc groove 31 whose axial direction is parallel to that of the output shaft 3 at the position where the inclined support block 41 is provided, and the arc portion of the arc groove 31 exceeds half of its corresponding full circle. The bottom of the inclined support block 41 is provided with a cylindrical part 411, and the inclined support block 41 is rotatably mounted in the corresponding arc groove 31 through the cylindrical part 411 to achieve a rotatable connection with the output shaft 3.

[0015] Furthermore, the top of the inclined support block 41 is an arc surface, which is used to increase the reliability of pressing against the inner wall of the shaft hole of the first input shaft 1.

[0016] Furthermore, rollers 51 are evenly provided circumferentially between the second input shaft 2 and the output shaft 3 to prevent the second input shaft 2 from contacting the output shaft 3.

[0017] Furthermore, the elastic component 42 is a spring, and the inclined support block 41 is provided with a through hole 412. The spring passes through the through hole 412 of each inclined support block 41 in sequence and is connected end to end. The spring is in a compressed state and is used to push the top of the inclined support block 41 toward the inner wall of the first input shaft 1 shaft hole and press it.

[0018] Furthermore, the first input shaft 1 and the output shaft 3, as well as the first input shaft 1 and the second input shaft 2, are rotatably connected by bearings 52.

[0019] Furthermore, each bearing 52 is equipped with a sealing ring 53.

[0020] By adopting the above technical solution, the present invention has the following beneficial effects: 1. In this invention, both the first input shaft and the second input shaft can independently drive the output shaft for bidirectional transmission, realizing bidirectional transmission with dual inputs and single output; 2. In this invention, the first input shaft and the second input shaft are automatically switched without the need for an additional control structure, which can realize the switch to the backup motor to drive the load. The structure is simple and the weight is light. 3. By adjusting the gap between the convex claw and the inclined support block, the present invention can precisely control the idle angle of the backstop, resulting in precise and sensitive transmission. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the front and rear connection states during the operation of this invention.

[0022] Figure 2 This is a schematic diagram of the overall structure of the present invention (partial cross-section).

[0023] Figure 3 This is a schematic diagram of the left-side structure of the present invention (partial cross-section).

[0024] Figure 4 yes Figure 3 An enlarged structural diagram of a set of diagonal bracing blocks at point A.

[0025] Figure 5 This is an exploded structural diagram of the present invention (the sealing ring and the elastic retaining ring are omitted).

[0026] Figure 6 This is a schematic diagram of the overall structure of the output shaft in this invention.

[0027] Figure 7 This is a schematic diagram of the overall structure of the second input shaft in this invention.

[0028] Figure 8 This is an exploded structural diagram of the present invention from another angle (the sealing ring and elastic retaining ring are omitted).

[0029] Figure 9 This is a schematic diagram of the installation structure of the output shaft, diagonal brace, and elastic component in this invention.

[0030] Figure 10 This is a schematic diagram of the driving principle of the second input shaft in this invention.

[0031] Figure descriptions: 1. First input shaft; 11. Input shaft gear; 2. Second input shaft; 21. Claw; 3. Output shaft; 31. Arc groove; 41. Diagonal brace; 411. Cylindrical part; 412. Through hole; 42. Elastic component; 51. Roller; 52. Bearing; 53. Sealing ring; 6. First input motor; 61. Gearbox; 62. Drive gear; 7. Second input motor; 8. Load. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the present invention clearer, the features and performance of a dual-input single-output bidirectional transmission connection device of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0033] Please see the appendix Figures 1-10 A dual-input single-output bidirectional transmission connection device includes a first input shaft 1, a second input shaft 2, and an output shaft 3 arranged coaxially.

[0034] The output shaft 3 is provided with a plurality of connecting components evenly distributed along its circumference. The connecting components can engage or disengage with the inner wall of the shaft hole of the first input shaft 1, thereby enabling the connection and disconnection of the first input shaft 1 and the output shaft 3.

[0035] The connecting component is located between the output shaft 3 and the shaft hole of the first input shaft 1, and includes two inclined support blocks 41 arranged circumferentially along the output shaft 3. The bottom of the inclined support block 41 is rotatably connected to the outer circular surface of the output shaft 3 and the axis of rotation is parallel to the axis of the output shaft 3. The inclined support block 41 can rotate around the axis of rotation to press or separate its top from the inner wall of the shaft hole of the first output shaft 3.

[0036] Specifically, the effective height of the diagonal brace 41 is greater than the distance between the outer circle of the output shaft 3 and the shaft hole of the first output shaft 3. The tops of the two diagonal braces 41 in the same connecting assembly are offset to one side away from each other, so as to realize that the first input shaft 1 drives the output shaft 3 to rotate in both directions.

[0037] Specifically, the outer circular surface of the output shaft 3 is provided with an arc groove 31 whose axial direction is parallel to that of the output shaft 3 at the position where the inclined support block 41 is provided, and the arc portion of the arc groove 31 exceeds half of its corresponding full circle. The bottom of the inclined support block 41 is provided with a cylindrical part 411, and the inclined support block 41 is rotatably mounted in the corresponding arc groove 31 through the cylindrical part 411 to achieve a rotatable connection with the output shaft 3.

[0038] The top of the diagonal brace 41 is curved to increase the reliability of pressing against the inner wall of the first input shaft 1 shaft hole.

[0039] The second input shaft 2 can separate the connecting component from the inner wall of the shaft hole of the first input shaft 1 when it rotates actively, and drive the output shaft 3 to rotate, so as to switch the power source of the output shaft 3 from the first input shaft 1 to the second input shaft 2.

[0040] Specifically, the second input shaft 2 has a plurality of axially extending claws 21 at one end near the output shaft 3. The number of claws 21 is consistent with the number of connecting components and corresponds one-to-one. The claws 21 extend into the outer circle of the output shaft 3 and the shaft hole of the first output shaft 3 and are located between the two inclined support blocks 41 of the corresponding connecting components.

[0041] When the second input shaft 2 rotates actively, the top of the pawl 21 can push the top of the inclined support block 41 in the direction of rotation, so that the inclined support block 41 rotates around its rotation axis until the top separates from the inner wall of the shaft hole of the first input shaft 1. Then the bottom of the pawl 21 contacts the bottom of the corresponding inclined support block 41. The second input shaft 2 drives the output shaft 3 to rotate by pushing the inclined support block 41 in the direction of rotation through the pawl 21.

[0042] The connecting assembly also includes an elastic component 42 for keeping the top of the diagonal brace 41 pressed against the inner wall of the shaft hole of the first input shaft 1. When the second input shaft 2 rotates actively, the claw 21 can cause the diagonal brace 41 in front of the rotation to overcome the elastic force of the elastic component 42 and separate from the inner wall of the shaft hole of the first input shaft 1.

[0043] Specifically, the elastic component 42 is a spring, and the inclined support block 41 is provided with a through hole 412. The spring passes through the through hole 412 of each inclined support block 41 in sequence and is connected end to end. The spring is in a compressed state and is used to push the top of the inclined support block 41 toward the inner wall of the first input shaft 1 shaft hole and press it.

[0044] Rollers 51 are evenly provided circumferentially between the second input shaft 2 and the output shaft 3 to prevent the second input shaft 2 from contacting the output shaft 3.

[0045] The first input shaft 1 and the output shaft 3, as well as the first input shaft 1 and the second input shaft 2, are rotatably connected by bearings 52, and each bearing 52 is provided with a sealing ring 53.

[0046] In a specific implementation, a dual-input single-output bidirectional transmission connection device includes a first input shaft 1, a second input shaft 2, an output shaft 3, a bracing block 41, a spring, a bearing 52, etc. The first input shaft 1 is connected to the gearbox 61 of the first input motor 6, the second input shaft 2 is connected to the second input motor 7, and the output shaft 3 is connected to the load 8. The output shaft 3 can be driven by both the first input shaft 1 and the second input shaft 2.

[0047] The first input shaft 1 is equipped with an input shaft gear 11, which meshes with the output gear of the gearbox 61 of the first input motor 6. Multiple sets of arc grooves 31 are evenly distributed along the circumference of the outer circumference of the output shaft 3. Each set includes two arc grooves 31, and a diagonal support block 41 is installed opposite to each other in the two arc grooves 31 of each set. A through hole 412 is opened in the middle of the diagonal support block 41, and a spring is installed inside the through hole 412. The spring is a helical spring, connected end-to-end in a ring, passing sequentially through all the diagonal support blocks 41. The top of the spring-supported diagonal support block 41 is wedged into the inner wall of the first input shaft 1. When the first input shaft 1 rotates in both directions, the diagonal support block 41 in each set that is behind the rotating direction can achieve self-locking, realizing bidirectional drive of the output shaft 3 to rotate.

[0048] The second input shaft 2 has a flat key at one end and several protruding claws 21 on the other side. The number of protruding claws 21 is equal to the number of sets of arc grooves 31 on the output shaft 3. The protruding claws 21 extend into the space between the output shaft 3 and the first input shaft 1, and are located between two inclined support blocks 41 in the same set. The upper and lower halves of the side of the protruding claw 21 have different gaps with the top and bottom sides of the adjacent inclined support blocks 41, respectively. When the protruding claw 21 rotates, the upper half of the side of the protruding claw 21 first contacts the top side of the inclined support block 41 in the direction of rotation, pushing the inclined support block 41 to disengage from the inner wall of the first input shaft 1. At this time, there is still a gap between the lower half of the side of the protruding claw 21 and the bottom side of the inclined support block 41. When the protruding claw 21 continues to rotate until the lower half of the side contacts the bottom side of the inclined support block 41, the protruding claw 21, the inclined support block 41, and the output shaft 3 become a whole, realizing the bidirectional drive of the second input shaft 2 to rotate the output shaft 3.

[0049] like Figure 1 As shown, the working principle of the connecting device is as follows: the first input motor 6 drives the input shaft gear 11 through the gearbox 61 and the drive gear 62, and drives the first input shaft 1 through gear meshing. The first input shaft 1 can drive the output shaft 3 to rotate in both directions, realizing bidirectional transmission of the load 8. The second input motor 7 is connected to the second input shaft 2 through a flat key. The second input shaft 2 can drive the output shaft 3 to rotate in both directions, realizing bidirectional transmission of the load 8.

[0050] like Figures 2-4 As shown, the connecting device includes a first input shaft 1, a second input shaft 2, an output shaft 3, a diagonal brace 41, and a spring. Figure 5 and Figure 7 As shown, one side of the second input shaft 2 is divided into several protrusions 21, such as... Figure 5 and Figure 6 The output shaft 3 shown has several sets of arc grooves 31, equal in number to the number of claws 21, with each set including two arc grooves 31. For example... Figure 9 As shown, the diagonal bracing block 41 is installed in the arc groove 31, and the diagonal bracing blocks 41 in each group are installed opposite each other.

[0051] like Figure 4As shown, the inner wall surface of the first input shaft 1 contacts the top arc surface of the inclined support block 41, and the arc groove 31 of the output shaft 3 mates with the cylindrical part 411 of the inclined support block 41. The inclined support block 41 has an eccentric arc structure, and two inclined support blocks 41 in each group are installed opposite each other. Two bearings 52 provide support, an elastic retaining ring is used for axial positioning, and a sealing ring 53 is used for sealing. A spring provides preload to the inclined support block 41 to ensure that the inclined support block 41 quickly self-locks, and the pawl 21 of the second input shaft 2 penetrates into the middle of the two groups of oppositely installed inclined support blocks 41.

[0052] The working process of the connecting device is as follows: when the first input motor 6 rotates clockwise or counterclockwise, it drives the first input shaft 1 through the gearbox 61. The first input shaft 1 rotates accordingly. At this time, under the expected force of the spring, the top arc surface of the diagonal brace 41 contacts the inner wall surface of the first input shaft 1, and the bottom cylindrical part 411 cooperates with the arc groove 31 of the output shaft 3 to achieve self-locking. Since the diagonal braces 41 in each group are installed opposite each other, there is one diagonal brace 41 in both directions that can achieve wedging. The output shaft 3 rotates with the first input shaft 1 in both directions, realizing that the first input motor 6 drives the load 8 in both directions.

[0053] When the first input motor 6 is not working, the second input motor 7 is started, driving the second input shaft 2 bidirectionally via a flat key. The claw 21 of the second input shaft 2 penetrates between the groups of relatively mounted diagonal braces 41. Figure 4 As shown, the upper and lower halves of the side of the protruding claw 21 have different gaps h1 and h2 with the top and bottom sides of the adjacent inclined support block 41, respectively, and h1 is less than h2. When the second input shaft 2 rotates clockwise by a certain angle, h1 between the protruding claw 21 and the inclined support block 41 in the direction of rotation is first eliminated, and the upper half of the side of the protruding claw 21 first contacts the top side of the corresponding inclined support block 41, pushing the inclined support block 41 to rotate relative to the output shaft 3 by a certain angle, thus disengaging from the inner wall of the first input shaft 1. Since the other inclined support block 41 in the same group is in an overshoot state due to relative installation, the first input shaft 1 and the output shaft 3 automatically disengage. When the second input shaft 2 continues to rotate clockwise by a certain angle, h1 between the protruding claw 21 and the inclined support block 41 in the direction of rotation is eliminated, and the lower half of the protruding claw 21 contacts the bottom side of the corresponding inclined support block 41. At this time, the protruding claw 21 pushes the inclined support block 41, and the inclined support block 41 pushes the output shaft 3 to rotate clockwise, as shown. Figure 10 As shown. When the second input shaft 2 rotates counterclockwise, the pawl 21 pushes the other side of the inclined support block 41 in the same group, and the working principle is the same. This realizes that the second input shaft 2 drives the output shaft 3 to rotate in both directions, thereby driving the load 8 in both directions.

[0054] It should be noted that the parts not described in detail in this solution are all prior art. The above embodiments are only used to illustrate the present invention, but the present invention is not limited to the above embodiments. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A dual-input single-output bidirectional transmission coupling device, characterized by: It includes a first input axis (1), a second input axis (2), and an output axis (3) that are coaxially configured. The output shaft (3) is provided with a plurality of connecting components evenly distributed along its circumference. The connecting components can engage or disengage with the inner wall of the shaft hole of the first input shaft (1) to realize the connection and disconnection of the first input shaft (1) and the output shaft (3). The connecting assembly is located between the output shaft (3) and the shaft hole of the first input shaft (1), and includes two inclined support blocks (41) arranged circumferentially along the output shaft (3). The bottom of the inclined support block (41) is rotatably connected to the outer circular surface of the output shaft (3) and the axis of rotation is parallel to the axis of the output shaft (3). The inclined support block (41) can rotate around the axis of rotation to press or separate its top from the inner wall of the shaft hole of the first output shaft (3). The effective height of the inclined support block (41) is greater than the distance between the outer circle of the output shaft (3) and the shaft hole of the first output shaft (3). The tops of the two inclined support blocks (41) in the same connecting assembly are offset to one side away from each other, so as to realize the bidirectional rotation of the output shaft (3) driven by the first input shaft (1). The second input shaft (2) can separate the connecting component from the inner wall of the shaft hole of the first input shaft (1) and drive the output shaft (3) to rotate when it rotates actively, so as to realize the power source of the output shaft (3) from the first input shaft (1) to the second input shaft (2). The second input shaft (2) has multiple axially extending claws (21) at one end near the output shaft (3). The number of claws (21) is consistent with the number of connecting components and corresponds one-to-one. The claws (21) extend into the outer circle of the output shaft (3) and the shaft hole of the first output shaft (3) and are located between the two inclined support blocks (41) of the corresponding connecting components. When the second input shaft (2) rotates actively, the top of the pawl (21) can push the top of the inclined support block (41) in front of the rotation direction, so that the inclined support block (41) rotates around its rotation axis until the top separates from the inner wall of the shaft hole of the first input shaft (1). Then the bottom of the pawl (21) contacts the bottom of the corresponding inclined support block (41). The second input shaft (2) drives the output shaft (3) to rotate by pushing the inclined support block (41) in front of the rotation through the pawl (21).

2. The dual-input single-output bidirectional transmission connection device as described in claim 1, characterized in that: The connecting assembly also includes an elastic component (42) for keeping the top of the brace block (41) pressed against the inner wall of the shaft hole of the first input shaft (1), and the claw (21) is able to cause the brace block (41) in front of the second input shaft (2) to overcome the elastic force of the elastic component (42) and separate from the inner wall of the shaft hole of the first input shaft (1) when the second input shaft (2) is actively rotated.

3. The dual-input single-output bidirectional transmission connection device as described in claim 1, characterized in that: The outer circular surface of the output shaft (3) has an arc groove (31) with an axial direction parallel to the output shaft (3) at the position where the inclined support block (41) is provided. The arc portion of the arc groove (31) exceeds half of its corresponding full circle. The bottom of the inclined support block (41) has a cylindrical part (411). The inclined support block (41) is rotatably mounted in the corresponding arc groove (31) through the cylindrical part (411) to achieve a rotatable connection with the output shaft (3).

4. The dual-input single-output bidirectional transmission connection device as described in claim 1, characterized in that: The top of the diagonal brace (41) is an arc surface, which is used to increase the reliability of pressing against the inner wall of the shaft hole of the first input shaft (1).

5. The dual-input single-output bidirectional transmission connection device as described in claim 1, characterized in that: Rollers (51) are evenly distributed circumferentially between the second input shaft (2) and the output shaft (3) to prevent the second input shaft (2) from contacting the output shaft (3).

6. The dual-input single-output bidirectional transmission connection device as described in claim 2, characterized in that: The elastic component (42) is a spring. The inclined support block (41) has a through hole (412). The spring passes through the through hole (412) of each inclined support block (41) in sequence and is connected end to end. The spring is in a compressed state and is used to push the top of the inclined support block (41) closer to the inner wall of the shaft hole of the first input shaft (1) and press it tightly.

7. The dual-input single-output bidirectional transmission connection device as described in claim 1, characterized in that: The first input shaft (1) and the output shaft (3), as well as the first input shaft (1) and the second input shaft (2), are rotatably connected by bearings (52).

8. The dual-input single-output bidirectional transmission connection device as described in claim 7, characterized in that: Each bearing (52) is provided with a sealing ring (53).

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