An angle-adjustable gear box

Abstract

The application relates to a gear box with adjustable angle, belonging to the transmission technical field. In order to solve the problem that with the change of the helicopter model, the included angle between the left and right engine input end and the inner and outer rotors is different, multiple gear boxes need to be matched, and the adaptability is poor and the cost is high, the application comprises an output driving mechanism, an intermediate transmission mechanism, an input driving mechanism, a box body I, an intermediate adapter plate and a box body II; the box body II, the intermediate adapter plate and the box body I are coaxially arranged in sequence, the side end surface of the box body II and the intermediate adapter plate is detachably connected, and the other side end surface of the box body I and the intermediate adapter plate is detachably connected; the intermediate transmission mechanism is axially installed in the gear box body, the output driving mechanism is installed in the box body I, the output end of the output driving mechanism is connected with the input end of the intermediate transmission mechanism, the input driving mechanism is installed in the box body II, and the input end of the input driving mechanism is connected with the output end of the intermediate transmission mechanism. The application is mainly used for adjusting the angle of the input shaft and the output shaft.

Description

Technical Field

[0001] This invention relates to the field of transmission technology, and more particularly to an angle-adjustable gearbox. Background Technology

[0002] During factory testing, helicopter transmission systems require simulated loading tests on all load ends. A certain helicopter model employs a transmission system with left and right engine inputs and inner / outer rotor and tail shaft outputs. The angle between the left and right engine inputs and the inner / outer rotor shafts is greater than 90°. During testing, the left and right engine inputs are driven by drive motors, which are horizontally mounted at a 90° angle to the inner / outer rotors. Therefore, a gearbox is needed to connect the drive motors to the left and right engines, and the gearbox's input and output angles are greater than 90°. While a small-angle gear transmission could be used, the angles between the left and right engine inputs and the inner / outer rotors vary depending on the helicopter model, requiring multiple gearboxes. This results in poor adaptability for testing equipment and increased costs. Summary of the Invention

[0003] The technical problem that this invention aims to solve is that as helicopter models change, the angle between the left and right engine input ends and the inner and outer rotors is different, requiring the matching of multiple gearboxes. This results in poor adaptability and increased cost for test equipment. Therefore, this invention provides an angle-adjustable gearbox.

[0004] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows:

[0005] An angle-adjustable gearbox includes an output drive mechanism, an intermediate transmission mechanism, an input drive mechanism, a housing I, an intermediate adapter plate, and a housing II. The housing II, intermediate adapter plate, and housing I are coaxially arranged and assembled to form the gearbox housing. Housing II is detachably connected to one end face of the intermediate adapter plate, and housing I is detachably connected to the other end face of the intermediate adapter plate. The intermediate transmission mechanism is axially mounted within the gearbox housing and can rotate relative to the gearbox housing. The output drive mechanism is mounted within housing I, and its output end is connected to the input end of the intermediate transmission mechanism. The input drive mechanism is mounted within housing II, and its input end is connected to the output end of the intermediate transmission mechanism.

[0006] Furthermore, the intermediate adapter plate has a ring structure. The portion of the intermediate adapter plate facing the box I near the inner side has a ring of bolt holes and pin holes. The inner side of the intermediate adapter plate facing the box II has a ring of annular steps, and the portion of the intermediate adapter plate facing the box II near the outer side has a ring of bolt holes and pin holes.

[0007] Furthermore, the housing I includes a positioning ring I, a supporting shell I, a supporting end cover I, an end face connecting ring I, and an input bevel gear bushing I; the supporting shell I is a shell with openings at both ends, and the supporting end cover I is installed at one end port of the supporting shell I and is sealed; one end face of the end face connecting ring I is welded to the other end port of the supporting shell I, and the portion of the end face connecting ring I near the inner side is fixedly connected to the input bevel gear bushing I by bolts and cylindrical pins; the positioning ring I is welded to the other end face of the end face connecting ring I, and the outer diameter of the positioning ring I is equal to the inner diameter of one end port of the intermediate adapter plate; the intermediate adapter plate is fitted onto the positioning ring I, and the portion of the end face connecting ring I near the outer side is fixedly connected to one end face of the intermediate adapter plate by bolts and cylindrical pins.

[0008] Furthermore, the housing I also includes two adjusting shims: one adjusting shim is provided between the support end cover I and the support housing I, and another adjusting shim is provided between the end face connecting ring I and the input bevel gear bushing I.

[0009] Furthermore, the housing II includes a supporting shell II, a supporting end cover II, a supporting end cover III, a supporting end cover IV, an end face connecting ring II, and an output bevel gear bushing II. The supporting shell II is a square shell with four openings. The supporting end cover II is installed at the left end port of the supporting shell II and is sealed. The end face connecting ring II is installed at the right end port of the supporting shell II. The supporting end cover III is installed at the upper end port of the supporting shell II, and an adjusting shim is provided between the two. The supporting end cover IV is installed at the lower end port of the supporting shell II, and an adjusting shim is provided between the two. The inner part of the end face connecting ring II is fixedly connected to the output bevel gear bushing II by bolts. The outer part of the end face connecting ring II is fixedly connected to the intermediate adapter plate by bolts.

[0010] Furthermore, an integral positioning ring II is provided on the end face of the end face connecting ring II facing the intermediate transition plate. The positioning ring II on the end face connecting ring II is inserted into the intermediate transition plate, and the outer diameter of the positioning ring II is equal to the inner diameter of the annular step on the intermediate transition plate.

[0011] Furthermore, the output drive mechanism includes a bracket I, two roller bearings, a ball bearing, an output bevel gear I, an output bevel gear shaft I, and an output bevel gear bushing I. The bracket I is installed inside the housing I. The output bevel gear bushing I is radially installed on the support housing I of the housing I. One end of the output bevel gear shaft I is rotatably installed on the bracket I via a roller bearing, and the other end of the output bevel gear shaft I is installed inside the output bevel gear bushing I via a roller bearing and a ball bearing. The output bevel gear I is fitted onto the output bevel gear shaft I.

[0012] Furthermore, the intermediate transmission mechanism includes an input bevel gear I, an input bevel gear shaft I, a splined rod, an output bevel gear II, an output bevel gear shaft II, four roller bearings, and two ball bearings. The input bevel gear shaft I is axially positioned within the housing I. One end of the input bevel gear shaft I is rotatably mounted on the support end cover I via a roller bearing. The other end of the input bevel gear shaft I is inserted into the input bevel gear bushing I via a roller bearing and a ball bearing. The end of the input bevel gear shaft I inserted into the input bevel gear bushing I has an internal spline structure. The input bevel gear I is fitted onto the input bevel gear shaft I, and the input… The input bevel gear I is located inside housing I, and it meshes with the output bevel gear I. The output bevel gear shaft II is axially positioned inside housing II. One end of the output bevel gear shaft II is inserted into the output bevel gear bushing II via a roller bearing and a ball bearing. The end of the output bevel gear shaft II inserted into the output bevel gear bushing II has an internal spline structure. The output bevel gear II is fitted onto the output bevel gear shaft II, and the output bevel gear II is located inside housing II. The end of the input bevel gear shaft I with the internal spline meshes with one end of a spline rod, and the end of the output bevel gear shaft II with the internal spline meshes with the other end of the spline rod.

[0013] Furthermore, the input drive mechanism includes an input bevel gear II, an input bevel gear shaft II, an input bevel gear bushing II, two roller bearings, and one ball bearing; the input bevel gear bushing II is radially mounted on the support end cover III, the input bevel gear shaft II is radially mounted inside the support housing II, one end of the input bevel gear shaft II is rotatably mounted on the support end cover IV via a roller bearing, and the other end of the input bevel gear shaft II is mounted inside the input bevel gear bushing II via a roller bearing and a ball bearing; the input bevel gear II is fitted onto the input bevel gear shaft II, and the input bevel gear II meshes with the output bevel gear II.

[0014] The beneficial effects of this invention compared to the prior art are:

[0015] To adapt to various helicopter casing tests and accommodate different angles of the left and right engine input ends and the inner and outer rotor shafts, this application proposes an angle-adjustable gearbox. By replacing different intermediate adapter plates, the input and output angles of the gearbox can be easily and conveniently adjusted, with high angle adjustment accuracy and strong reliability. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are provided to further illustrate the invention.

[0017] Figure 1 This is a schematic diagram of the overall structure of the gearbox housing of the present invention;

[0018] Figure 2This is a schematic diagram of the internal structure of the gearbox of the present invention.

[0019] Explanation of reference numerals in the attached drawings: 1-Intermediate adapter plate; 1-1-Annular step; 2-Support housing I; 3-Support end cover I; 4-End face connecting ring I; 5-Input bevel gear bushing I; 6-Support housing II; 7-Support end cover II; 8-End face connecting ring II; 8-1-Positioning ring II; 9-Output bevel gear bushing II; 10-Output bevel gear I; 11-Output bevel gear shaft I; 12-Positioning ring I; 13-Output bevel gear bushing I; 14-Input bevel gear I; 15-Input bevel gear shaft I; 16-Spline rod; 17-Output bevel gear II; 18-Output bevel gear shaft II; 20-Input bevel gear II; 21-Input bevel gear shaft II; 22-Input bevel gear bushing II; 24-Support end cover III; 25-Support end cover IV; 26-Bracket I. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0021] See Figure 1 and Figure 2 This application provides an angle-adjustable gearbox, which includes an output drive mechanism A, an intermediate transmission mechanism B, an input drive mechanism C, a housing IDE, an intermediate adapter plate 1, and a housing IE.

[0022] See Figure 1 The gearbox housing IIE, intermediate adapter plate 1, and gearbox housing ID are coaxially arranged and assembled to form a gearbox housing. One end face of gearbox housing IIE is detachably connected to one end face of intermediate adapter plate 1, and the other end face of gearbox housing ID is detachably connected to the other end face of intermediate adapter plate 1. The intermediate transmission mechanism B is axially installed inside the gearbox housing and can rotate relative to the gearbox housing. The output drive mechanism A is installed inside gearbox housing ID, and the input end of the output drive mechanism A is connected to the output end of the intermediate transmission mechanism B. The input drive mechanism C is installed inside gearbox housing IIE, and the output end of the input drive mechanism C is connected to the input end of the intermediate transmission mechanism B.

[0023] See Figure 1 The intermediate adapter plate 1 has a ring structure. The part of the intermediate adapter plate 1 facing the box body 1D with a ring of bolt holes and pin holes is opened. The part of the intermediate adapter plate 1 facing the box body 1E with a ring of annular steps 1-1 is machined on the inner side. The part of the intermediate adapter plate 1 facing the box body 1E with a ring of bolt holes and pin holes is opened on the outer side.

[0024] See Figure 1The housing IDE includes a positioning ring I12, a support housing I2, a support end cap I3, an end face connecting ring I4, an input bevel gear bushing I5, and two adjusting shims. The support housing I2 is a housing with openings at both ends. The support end cap I3 is installed at one end of the support housing I2 and is sealed. An adjusting shim is provided between the support end cap I3 and the support housing I2. One end face of the end face connecting ring I4 is welded to the other end of the support housing I2. The inner part of the end face connecting ring I4 is fixedly connected to the input bevel gear bushing I5 by bolts and cylindrical pins, and an adjusting shim is provided between them. The positioning ring I12 is welded to the other end face of the end face connecting ring I4. The outer diameter of the positioning ring I12 is equal to the inner diameter of one end of the intermediate adapter plate 1. The intermediate adapter plate 1 is fitted onto the positioning ring I12. The outer part of the end face connecting ring I4 is fixedly connected to one end face of the intermediate adapter plate 1 by bolts and cylindrical pins.

[0025] See Figure 1 The housing IIE includes a supporting shell II6, a supporting end cover II7, a supporting end cover III24, a supporting end cover IV25, an end face connecting ring II8, and an output bevel gear bushing II9. The supporting shell II6 is a square shell with four open sides. The supporting end cover II7 is installed at the left end port of the supporting shell II6 and is sealed. The end face connecting ring II8 is installed at the right end port of the supporting shell II6. The supporting end cover III24 is installed at the upper end port of the supporting shell II6, and an adjusting shim is provided between the two. The supporting end cover IV25 is installed at the lower end port of the supporting shell II6, and an adjusting shim is provided between the two. An integral positioning ring II8-1 is provided on the end face of the end face connecting ring II8 facing the intermediate transition plate 1. The positioning ring II8-1 on the end face connecting ring II8 is inserted into the intermediate transition plate 1. The outer diameter of the positioning ring II8-1 is equal to the inner diameter of the annular step 1-1 on the intermediate transition plate 1.

[0026] The inner part of the end face connecting ring II8 is fixedly connected to the output bevel gear bushing II9 by bolts; the outer part of the end face connecting ring II8 is fixedly connected to the intermediate adapter plate 1 by bolts.

[0027] In this embodiment, since housing IDE and housing IIE are connected by intermediate adapter plate 1, the phase of the connection between housing IDE and intermediate adapter plate 1 and the phase of the connection between housing IIE and intermediate adapter plate 1 determine the angle of the gearbox input shaft and the angle of the output shaft. The gearbox can achieve adjustable input and output angles by replacing different intermediate adapter plates 1 to adapt to different angles between the engine input end and the inner and outer rotors.

[0028] See Figure 2The output drive mechanism A includes a bracket I26, two roller bearings, one ball bearing, an output bevel gear I10, an output bevel gear shaft I11, and an output bevel gear bushing I13. The bracket I26 is installed inside the housing ID. The output bevel gear bushing I13 is radially installed on the support shell I2 of the housing ID. One end of the output bevel gear shaft I11 is rotatably mounted on the bracket I26 via a roller bearing, and the other end of the output bevel gear shaft I11 is mounted inside the output bevel gear bushing I13 via a roller bearing and a ball bearing. The output bevel gear I10 is fitted onto the output bevel gear shaft I11.

[0029] See Figure 2 The intermediate transmission mechanism B includes an input bevel gear I14, an input bevel gear shaft I15, a splined rod 16, an output bevel gear II17, an output bevel gear shaft II18, four roller bearings, and two ball bearings. The input bevel gear shaft I15 is axially positioned within the housing IDE. One end of the input bevel gear shaft I15 is rotatably mounted on the support end cover I3 via a roller bearing. The other end of the input bevel gear shaft I15 is inserted into the input bevel gear bushing I5 via a roller bearing and a ball bearing. The end of the input bevel gear shaft I15 inserted into the input bevel gear bushing I5 has an internal spline structure. The input bevel gear I14 is fitted onto the input bevel gear shaft I15, and the input bevel gear I14... 14 is located inside housing IDE, where the input bevel gear I14 meshes with the output bevel gear I10; the output bevel gear shaft II18 is axially positioned inside housing IIE, with one end of the output bevel gear shaft II18 inserted into the output bevel gear bushing II9 via a roller bearing and a ball bearing, the end of the output bevel gear shaft II18 inserted into the output bevel gear bushing II9 having an internal spline structure, and the output bevel gear II17 is fitted onto the output bevel gear shaft II18, and the output bevel gear II17 is located inside housing IIE; the end of the input bevel gear shaft I15 with an internal spline meshes with one end of the spline rod 16, and the end of the output bevel gear shaft II18 with an internal spline meshes with the other end of the spline rod 16.

[0030] See Figure 2The input drive mechanism C includes an input bevel gear II20, an input bevel gear shaft II21, an input bevel gear bushing II22, two roller bearings, and one ball bearing. The input bevel gear bushing II22 is radially mounted on the support end cover III24, and the input bevel gear shaft II21 is radially mounted inside the support housing II6. One end of the input bevel gear shaft II21 is rotatably mounted on the support end cover IV25 via a roller bearing, and the other end of the input bevel gear shaft II21 is mounted inside the input bevel gear bushing II22 via a roller bearing and a ball bearing. The input bevel gear II20 is fitted onto the input bevel gear shaft II21, and the input bevel gear II20 meshes with the output bevel gear II17.

[0031] In this embodiment, the input bevel gear shaft II21 and the output bevel gear shaft I11 have a certain included angle in the radial direction. The included angle between them is achieved by replacing different intermediate adapter plates. The phase holes at both ends of the intermediate adapter plate are machined by CNC machine tools to ensure the accuracy of the phase angle.

[0032] In this embodiment, housing IDE and housing IIE are independent spiral bevel gearboxes. To ensure that the bearings and gears have a good stress state, all gear shafts adopt a "simply supported" arrangement, that is, each gear shaft is supported by two cylindrical roller bearings and one ball bearing.

[0033] In this embodiment, the two inner stops of the intermediate adapter plate 1 and the housing IDE and housing IE have high coaxiality and tolerance requirements.

[0034] In this embodiment, to facilitate the adjustment of the contact of the bevel gear tooth surfaces, all bearings are installed inside bushings, which are mounted on the housing, and the tooth surface contact is adjusted by grinding and adjusting shims.

[0035] While the invention has been described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the invention. Therefore, it should be understood that many modifications can be made to the exemplary embodiments, and other arrangements can be designed without departing from the spirit and scope of the invention as defined by the appended claims. It should be understood that different dependent claims and features described herein can be combined in ways different from those described in the original claims. It is also understood that features described in conjunction with individual embodiments can be used in other described embodiments.

Claims

1. An angle adjustable gearbox, characterized by: It includes an output drive mechanism (A), an intermediate transmission mechanism (B), an input drive mechanism (C), a housing I (D), an intermediate adapter plate (1), and a housing II (E); the housing II (E), the intermediate adapter plate (1), and the housing I (D) are arranged coaxially and assembled into a gearbox housing. The housing II (E) is detachably connected to one end face of the intermediate adapter plate (1), and the housing I (D) is detachably connected to the other end face of the intermediate adapter plate (1); the intermediate transmission mechanism (B) is axially installed in the gearbox housing and can rotate relative to the gearbox housing; the output drive mechanism (A) is installed in the housing I (D), and the output end of the output drive mechanism (A) is connected to the input end of the intermediate transmission mechanism (B); the input drive mechanism (C) is installed in the housing II (E), and the input end of the input drive mechanism (C) is connected to the output end of the intermediate transmission mechanism (B); The housing I (D) includes a positioning ring I (12), a support housing I (2), a support end cap I (3), an end face connecting ring I (4), and an input bevel gear bushing I (5). The support housing I (2) is a housing with openings at both ends. The support end cap I (3) is installed at one end of the support housing I (2) and sealed. One end face of the end face connecting ring I (4) is welded to the other end of the support housing I (2). The part of the end face connecting ring I (4) near the inner side is fixedly connected to the input bevel gear bushing I (5) by bolts and cylindrical pins. The positioning ring I (12) is welded to the other end face of the end face connecting ring I (4). The outer diameter of the positioning ring I (12) is equal to the inner diameter of one end of the intermediate adapter plate (1). The intermediate adapter plate (1) is fitted on the positioning ring I (12). The part of the end face connecting ring I (4) near the outer side is fixedly connected to one end face of the intermediate adapter plate (1) by bolts and cylindrical pins.

2. An angle adjustable gearbox as claimed in claim 1, characterized in that: The intermediate adapter plate (1) is a ring structure. The part of the intermediate adapter plate (1) facing the box body I (D) near the inner side has a ring of bolt holes and pin holes. The part of the intermediate adapter plate (1) facing the box body II (E) has a ring of annular steps (1-1) on the inner side. The part of the intermediate adapter plate (1) facing the box body II (E) near the outer side has a ring of bolt holes and pin holes.

3. An angle adjustable gearbox as claimed in claim 1, characterized in that: The housing I (D) also includes two adjusting shims. An adjusting shim is provided between the support end cover I (3) and the support housing I (2), and an adjusting shim is provided between the end face connecting ring I (4) and the input bevel gear bushing I (5).

4. An angle adjustable gearbox as claimed in claim 1, characterized in that: The housing II (E) includes a supporting shell II (6), a supporting end cover II (7), a supporting end cover III (24), a supporting end cover IV (25), an end face connecting ring II (8), and an output bevel gear bushing II (9). The supporting shell II (6) is a square shell with four openings. The supporting end cover II (7) is installed at the left end port of the supporting shell II (6) and sealed. The end face connecting ring II (8) is installed at the right end port of the supporting shell II (6). The supporting end cover III (24) is installed at the upper end port of the supporting shell II (6), and an adjusting shim is provided between the two. The supporting end cover IV (25) is installed at the lower end port of the supporting shell II (6), and an adjusting shim is provided between the two. The part of the end face connecting ring II (8) near the inner side is fixedly connected to the output bevel gear bushing II (9) by bolts. The part of the end face connecting ring II (8) near the outer side is fixedly connected to the intermediate adapter plate (1) by bolts.

5. An angle adjustable gearbox according to claim 4, characterized in that: The end face connecting ring II (8) facing the intermediate transition plate (1) is provided with an integral positioning ring II (8-1). The positioning ring II (8-1) on the end face connecting ring II (8) is inserted into the intermediate transition plate (1). The outer diameter of the positioning ring II (8-1) is equal to the inner diameter of the annular step (1-1) on the intermediate transition plate (1).

6. An angle adjustable gearbox according to claim 5, characterized in that: The output drive mechanism (A) includes a bracket I (26), two roller bearings, a ball bearing, an output bevel gear I (10), an output bevel gear shaft I (11), and an output bevel gear bushing I (13). The bracket I (26) is installed inside the housing I (D). The output bevel gear bushing I (13) is radially installed on the support housing I (2) of the housing I (D). One end of the output bevel gear shaft I (11) is rotatably installed on the bracket I (26) through a roller bearing, and the other end of the output bevel gear shaft I (11) is installed inside the output bevel gear bushing I (13) through a roller bearing and a ball bearing. The output bevel gear I (10) is fitted onto the output bevel gear shaft I (11).

7. An angle adjustable gearbox according to claim 6, characterized in that: The intermediate transmission mechanism (B) includes an input bevel gear I (14), an input bevel gear shaft I (15), a spline rod (16), an output bevel gear II (17), an output bevel gear shaft II (18), four roller bearings and two ball bearings; the input bevel gear shaft I (15) is axially arranged in the housing I (D), one end of the input bevel gear shaft I (15) is rotatably mounted on the support end cover I (3) through a roller bearing, and the other end of the input bevel gear shaft I (15) is inserted into the input bevel gear bushing I (5) through a roller bearing and a ball bearing. The end of the input bevel gear shaft I (15) inserted into the input bevel gear bushing I (5) has an internal spline structure. The input bevel gear I (14) is fitted on the input bevel gear shaft I (15), and the input bevel gear I (16) is axially arranged in the housing I (D). One end of the input bevel gear shaft I (15) is rotatably mounted on the support end cover I (3) through a roller bearing. The other end of the input bevel gear shaft I (15) is inserted into the input bevel gear bushing I (5). The input bevel gear I (14) is rotatably mounted on the input bevel gear shaft I (15), and the input bevel gear I (16) is rotatably mounted on the support end cover I (3). 4) The input bevel gear I (14) is meshed with the output bevel gear I (10) inside the housing I (D); the output bevel gear shaft II (18) is axially arranged inside the housing II (E), and one end of the output bevel gear shaft II (18) is inserted into the output bevel gear bushing II (9) through a roller bearing and a ball bearing. The end of the output bevel gear shaft II (18) inserted into the output bevel gear bushing II (9) has an internal spline structure. The output bevel gear II (17) is fitted on the output bevel gear shaft II (18) and the output bevel gear II (17) is inside the housing II (E); the end of the input bevel gear shaft I (15) with internal spline meshes with one end of the spline rod (16), and the end of the output bevel gear shaft II (18) with internal spline meshes with the other end of the spline rod (16).

8. An angle adjustable gearbox according to claim 7, characterized in that: The input drive mechanism (C) includes an input bevel gear II (20), an input bevel gear shaft II (21), an input bevel gear bushing II (22), two roller bearings and one ball bearing; the input bevel gear bushing II (22) is radially mounted on the support end cover III (24), the input bevel gear shaft II (21) is radially mounted inside the support housing II (6), one end of the input bevel gear shaft II (21) is rotatably mounted on the support end cover IV (25) through a roller bearing, and the other end of the input bevel gear shaft II (21) is mounted inside the input bevel gear bushing II (22) through a roller bearing and a ball bearing, the input bevel gear II (20) is fitted on the input bevel gear shaft II (21), and the input bevel gear II (20) meshes with the output bevel gear II (17).

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