Riveting method and equipment for transmission assembly output shaft and locking nut

Abstract

The present invention relates to a method and equipment for riveting the output shaft of a transmission assembly to a locking nut. The riveting method includes placing the transmission housing on a floating support mechanism, and a flange counter-rest mechanism supporting the lower side of the flange; the riveting surface of the rivet cutter is designed to be an inclined surface facing the output shaft; during the riveting process, a press applies a vertical force to the rivet cutter; after the riveting surface of the rivet cutter contacts the upper end face of the locking nut, the vertical pressure is converted into a horizontal force component and a vertical force component; wherein the horizontal force component causes the end face of the locking nut to deform, thereby achieving riveting with the output shaft. The riveting equipment includes a rivet cutter, a flange counter-rest mechanism, and a floating support mechanism; the floating support mechanism is used to support the transmission housing; the flange counter-rest mechanism is used to support the flange and cooperate with the rivet cutter to complete the riveting. The downward force of the riveting can be eliminated, thereby preventing damage to the transmission assembly caused by the force.

Description

Technical Field

[0001] The present invention relates to the technical field of gearboxes, and in particular to a riveting method and equipment for a gearbox assembly output shaft and a locking nut. Background Art

[0002] The structure of the longitudinal gearbox assembly is as follows Figure 1 As shown, after the output end of the output shaft 5 is assembled with the flange 4, the flange 4 needs to be locked with the locking nut 6, and the locking nut 6 needs to be riveted to the output shaft 5. If the traditional riveting method is used, the rivet cutter applies pressure on the upper end surface of the locking nut 6, causing the locking nut 6 to partially deform into the reserved riveting groove of the output shaft 5. During this process, the vertical riveting force will be transmitted through the flange 4 and the output shaft 5 to the interior of the gearbox housing 7, thereby damaging the internal components of the gearbox. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a riveting method and equipment for the output shaft and locking nut of a gearbox assembly. The force applied during the riveting process will not affect the internal parts of the gearbox, which is conducive to improving the reliability of the gearbox assembly.

[0004] In order to solve the above technical problems, the technical solution of the present invention is: a riveting method for the output shaft of the gearbox assembly and the locking nut, comprising:

[0005] The gearbox housing is placed on the floating support mechanism, and the flange backing mechanism supports the lower side of the flange;

[0006] The riveting surface of the rivet cutter is designed to be inclined and faces the output shaft. During the riveting process, the press applies a vertical force to the rivet cutter. After the riveting surface of the rivet cutter contacts the upper end face of the locking nut, the vertical pressure is converted into horizontal and vertical components. The horizontal component causes the end face of the locking nut to deform, thereby achieving riveting with the output shaft.

[0007] As a preferred technical solution, the rivet cutter cooperates with the output shaft and the flange to achieve positioning.

[0008] The riveting equipment for realizing the riveting method of the output shaft of the gearbox assembly and the locking nut includes a rivet cutter, a flange backing mechanism and a floating support mechanism;

[0009] The floating support mechanism is used to support the gearbox housing;

[0010] The flange backing mechanism is used to support the flange and cooperate with the rivet cutter to complete riveting.

[0011] As a preferred technical solution, the flange backing mechanism includes a lifting bracket, a press, two backing claws, two backing supports and two backing cylinders;

[0012] The lifting bracket is arranged on the fixed bracket;

[0013] The press is mounted on a lifting bracket;

[0014] The two back-leaning supports are fixed on the lower side of the lifting bracket and are arranged at intervals. Each back-leaning support corresponds to a back-leaning claw and a back-leaning cylinder. The back-leaning claw is slidably arranged on the back-leaning support, and the two back-leaning claws can be close to or away from each other. The back-leaning cylinder is fixed on the back-leaning support to drive the back-leaning claw to move.

[0015] As a preferred technical solution, the flange backing mechanism further includes two lifting cylinders and a plurality of adjustment support blocks; the lifting cylinders are fixedly mounted on a fixed bracket, the lifting bracket is located above the fixed bracket and is fixedly connected to the piston rod of the lifting cylinder;

[0016] The adjustment support block is located between the fixed support and the lifting support to support the lifting support after it is adjusted into place.

[0017] As a preferred technical solution, the flange backing mechanism further includes two bracket adjustment cylinders, four bracket adjustment slides and two adjustment brackets;

[0018] The four bracket adjustment sliders are distributed at the four corners of the lower side of the lifting bracket and are slidably connected to the lifting bracket; the two bracket adjustment sliders located at the same end of the lifting bracket are fixedly connected through the adjustment bracket;

[0019] The support adjustment cylinder is fixed on the lifting support, and the piston rod of the support adjustment cylinder is fixedly connected to the adjustment support, and is used to drive the support adjustment slider to move to or away from the position corresponding to the adjustment support block.

[0020] As a preferred technical solution, the counter-leaning claws have a V-shaped groove, and the two counter-leaning claws are jointly supported on two opposite sides of the lower part of the flange.

[0021] As a preferred technical solution, the rivet cutter includes a guide sleeve, a positioning sleeve, a rivet head, a positioning column, a limit pin, a connecting block and an elastic member;

[0022] The lower end of the guide sleeve has a tapered guide surface that is adapted to the inner shape of the flange and can guide the rivet cutter to be installed;

[0023] The positioning sleeve is slidably arranged in the guide sleeve, and the positioning sleeve has an axially extending mounting hole and a radially extending limiting hole;

[0024] The positioning column is clearance-matched with the mounting hole, and a positioning hole is provided on the lower end of the positioning column to match the end face of the output shaft;

[0025] The connecting block is fixed to the upper end of the positioning sleeve;

[0026] The elastic member is located in the mounting hole, and its two ends are connected to the positioning column and the connecting block respectively;

[0027] The limiting pin is located in the limiting hole, with its middle portion passing through the positioning column and its two ends respectively located in the pin holes on the guide sleeve;

[0028] The rivet head is fixed to the lower end of the positioning sleeve, and a through hole is provided in the rivet head, and the positioning column extends into the through hole; a plurality of riveting surfaces are provided on the inner wall of the through hole for realizing riveting of the locking nut and the output shaft.

[0029] As a preferred technical solution, the floating support mechanism includes a floating positioning plate, a floating connecting plate, a floating cylinder, a guide rail, and a floating tray base;

[0030] The guide rails are arranged on the frame and connect multiple workstations;

[0031] The floating tray base is slidably arranged on the guide rail;

[0032] The floating connection plate is installed on the floating tray base and can float up and down relative to the floating tray base;

[0033] The floating positioning plate is fixed on the upper side of the floating connecting plate;

[0034] The shell of the floating cylinder is installed on the floating tray base, and the piston rod extends upward and is fixedly connected to the floating connecting plate.

[0035] As a preferred technical solution, a plurality of counter-support columns are fixed on the lower side of the floating connection plate.

[0036] Due to the adoption of the above technical solution, the riveting method and equipment for the output shaft of the gearbox assembly and the locking nut have the following advantages:

[0037] 1. The equipment structure can eliminate the downward force of riveting, avoiding damage to the gearbox assembly caused by the force;

[0038] 2. Different models need to match different engines, and the front housing and flange structures are inconsistent. By adjusting the flange back mechanism, rapid model conversion can be achieved to achieve the goal of multi-variety compatible production;

[0039] 3. By controlling the riveting force and displacement, the riveting shape and release force remain consistent, which is different from the manual riveting of other manufacturers and saves manpower. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0041] Figure 1 is a schematic structural diagram of a gearbox assembly according to an embodiment of the present invention;

[0042] Figure 2 This is a schematic diagram of the riveting equipment in use according to an embodiment of the present invention;

[0043] Figure 3 This is a structural diagram of the flange backing mechanism in an embodiment of the present invention;

[0044] Figure 4 is a cross-sectional view of a flange backing mechanism according to an embodiment of the present invention;

[0045] Figure 5 2 is a schematic structural diagram of the anti-leaning claw in an embodiment of the present invention;

[0046] Figure 6 2 is a schematic structural diagram of a rivet cutter according to an embodiment of the present invention;

[0047] Figure 7 is a cross-sectional view of a rivet cutter according to an embodiment of the present invention;

[0048] Figure 8 is a structural schematic diagram of a floating support mechanism in an embodiment of the present invention;

[0049] Figure 9 yes Figure 8 Middle AA section view.

[0050] In the picture:

[0051] 1-flange back-rest mechanism; 101-fixed bracket; 102-lifting cylinder; 103-lifting bracket; 104-bracket adjustment cylinder; 105-back-rest claw; 106-pressing machine; 107-bracket adjustment slider; 108-adjusting bracket; 109-back-rest cylinder; 110-back-rest support; 111-adjusting support block;

[0052] 2-Rivet cutter; 201-Guide sleeve; 202-Location sleeve; 203-Rivet head; 204-Location column; 205-Limiting pin; 206-Connecting block; 207-Riveted surface; 208-Elastic member; 209-Mounting hole; 210-Conical guide surface; 211-Limiting hole; 212-Pin hole; 213-Location hole;

[0053] 3- floating support mechanism; 31- floating positioning plate; 32- floating tray base; 33- floating cylinder; 34- guide rail; 35- floating connection plate; 36- counter-support column;

[0054] 4-flange; 5-output shaft; 6-locking nut; 7-transmission housing. DETAILED DESCRIPTION

[0055] The riveting method between the output shaft of the gearbox assembly and the locking nut includes:

[0056] The riveting surface of the rivet cutter is designed to be an inclined surface, facing the output shaft 5;

[0057] During the riveting process, the press exerts a vertical force on the rivet cutter; after the riveting surface of the rivet cutter contacts the upper end face of the locking nut 6, the vertical pressure is converted into horizontal and vertical components; the horizontal component causes the end face of the locking nut 6 to deform, thereby achieving riveting with the output shaft 5; the gearbox housing 7 is placed on a floating support mechanism, and the flange backing mechanism is used to support the lower side of the flange 4 to offset the vertical component.

[0058] The rivet cutter cooperates with the output shaft 5 for positioning. Specifically, the end surface of the output shaft 5 has two longitudinal sections, and the rivet cutter is provided with a positioning hole with the same shape as the output shaft 5, and the two cooperate to achieve positioning.

[0059] This method can not only realize the riveting fixation of the locking nut 6 and the output shaft 5, and the connection at the riveted joint is reliable, but also can reduce the damage of the riveting operation to the output shaft 5 and the internal transmission parts of the gearbox.

[0060] like Figure 2 As shown, the equipment for implementing the above-mentioned riveting method of the gearbox assembly flange and the locking nut includes a rivet cutter 2, a flange backing mechanism 1 and a floating support mechanism 3.

[0061] like Figure 3 、 4 As shown in Figure 5, the flange back-leaning mechanism includes a fixed bracket 101, a lifting bracket 103, two lifting cylinders 102, a press 106, two back-leaning claws 105, two back-leaning supports 110, two back-leaning cylinders 109 and several adjustment support blocks 111.

[0062] The fixed bracket 101 is fixed to a base or frame and has a fixed position. The lifting cylinder 102 is fixedly mounted on the fixed bracket 101. The lifting bracket 103 is located above the fixed bracket 101 and can be raised and lowered relative to the fixed bracket 101. A guide shaft and guide sleeve assembly can be provided between the fixed bracket 101 and the lifting bracket 103 to guide the lifting and lowering of the lifting bracket 103. The lifting bracket 103 is fixedly connected to the piston rod of the lifting cylinder 102, and is pushed up by the lifting cylinder 102. When the lifting bracket 103 reaches the required height, an adjustment support block 111 is placed between the fixed bracket 101 and the lifting bracket 103 to support the lifting bracket 103. This reduces the operating pressure of the lifting cylinder 102. The lifting bracket 103 only needs to maintain a certain pressure during the adjustment process; once the adjustment is in place, no pressure is required. Depending on actual use needs, one or more specifications of the adjustment support block 111 can be provided. The heights of the adjustment support blocks 111 of different specifications vary to correspond to the heights of different gearbox housing models.

[0063] Furthermore, to accommodate different aircraft models, the flange backrest mechanism also includes two bracket adjustment cylinders 104, four bracket adjustment sliders 107, and two adjustment brackets 108. The four bracket adjustment sliders 107 are located at the four corners of the lower side of the lifting bracket 103 and are slidably connected to the lifting bracket 103. The two bracket adjustment sliders 107 located at the same end of the lifting bracket 103 are fixedly connected via the adjustment bracket 108. The bracket adjustment cylinder 104 is fixed to the lifting bracket 103, and the piston rod of the bracket adjustment cylinder 104 is fixedly connected to the adjustment bracket 108, which is used to drive the bracket adjustment slider 107 to move to or away from the position corresponding to the adjustment support block 111.

[0064] Two counter-rest supports 110 are fixed to the underside of the lifting bracket 103 and spaced apart. Each counter-rest support 101 corresponds to a counter-rest claw 105 and a counter-rest cylinder 109. The counter-rest claws 105 are slidably mounted on the counter-rest supports 110, allowing the two counter-rest claws 105 to move closer or further apart. The counter-rest cylinder 109 is fixed to the counter-rest support 110 and drives the counter-rest claws 105 to move. The counter-rest claws 105 have V-shaped grooves and are supported on opposite sides of the lower portion of the flange 4.

[0065] The press 106 is mounted on the lifting bracket 103 .

[0066] like Figure 6 and Figure 7As shown, the rivet cutter 2 includes a guide sleeve 201, a positioning sleeve 202, a rivet head 203, a positioning post 204, a limiting pin 205, a connecting block 206, and an elastic member 208. The lower end of the guide sleeve 201 has a tapered guide surface 210 that conforms to the inner shape of the flange 4 and guides the installation of the rivet cutter 2. The positioning sleeve 202 is slidably disposed within the guide sleeve 201 and has an axially extending mounting hole 209 and a radially extending limiting hole 211. The positioning post 204 has a clearance fit within the mounting hole 209, allowing the positioning post 24 to move axially relative to the positioning sleeve 202. The lower end of the positioning post 204 is provided with a positioning hole 213 that mates with the end face of the output shaft 5. The connecting block 206 is fixed to the upper end of the positioning sleeve 202, and the two are fixedly connected. The elastic member 208 is located within the mounting hole, with its ends respectively connected to the positioning post 204 and the connecting block 206. The stop pin 25 is positioned within the stop hole 211, with its center extending through the positioning post 204 and its ends positioned within the pin holes 212 on the guide sleeve 201. The rivet head 203 is fixed to the lower end of the positioning sleeve 202 and moves synchronously with the sleeve. The rivet head 203 has a through hole within it, into which the positioning post 204 extends. Several riveted surfaces 207 are provided on the inner wall of the through hole to rivet the lock nut 6 to the output shaft 5. The number and location of the riveted surfaces 207 can be adjusted as needed.

[0067] Floating support mechanism 3 Figure 8 、 9 As shown, it includes a floating positioning plate 31, a floating connection plate 35, a floating cylinder 33, a guide rail 34, and a floating pallet base 32. The guide rail 34 is set on the frame and connects multiple workstations; the floating pallet base 32 is slidably set on the guide rail 34; the floating connection plate 35 is installed on the floating pallet base 32 and can float up and down relative to the floating pallet base 32; specifically, a plurality of guide sleeves are set on the floating pallet base 32, and guide posts are set on the bottom surface of the floating connection plate 35. The guide posts correspond to the guide sleeves one by one, and the guide posts are slidably set in the guide sleeves. The floating positioning plate 31 is fixed on the upper side of the floating connection plate 35. The shell of the floating cylinder 33 is installed on the floating pallet base 32, and the piston rod extends upward and is fixedly connected to the floating connection plate 35.

[0068] A plurality of back-supporting columns 36 are fixed to the lower side of the floating connection plate 35 for supporting other press-fitting stations.

[0069] When the device is in use,

[0070] The gearbox assembly is placed on the floating positioning plate 31 and put on line;

[0071] At the locking nut 6 installation station, tighten the locking nut to the target torque;

[0072] After arriving at the riveting station,

[0073] Place the rivet cutter 2 on the flange 4, and fit the positioning hole 213 over the end of the output shaft 5 to achieve positioning of the rivet cutter 2. After positioning, the riveting surface 207 corresponds to the position of the riveting groove reserved on the output shaft 5.

[0074] The floating cylinder 33 is inflated to lift the floating positioning plate 31 and the gearbox assembly into place;

[0075] The anti-leaning claw 105 moves to the lower side of the flange 4 to support the flange 4;

[0076] The pressure of the floating cylinder 33 is maintained constant to ensure that it does not fall when there is no riveting force input; the press 106 moves downward, contacts the connecting block 206 of the riveter 2, pushes the positioning sleeve 202 and the rivet head 203 downward to set the stroke, completes the riveting operation, and then resets;

[0077] Remove the rivet cutter 2 and place it on the positioning seat.

[0078] During the above-mentioned riveting process, since the pressure of the floating cylinder 33 is consistent with the weight of the floating positioning plate 31 and the gearbox assembly thereon, when the press 106 presses down, the force applied to the flange 4 is offset by the counter-pawl 105; and the downward force transmitted to the output shaft 5 is buffered by the floating cylinder 33 and will not act on the transmission components in the gearbox, ensuring that the components will not be damaged due to the riveting operation, thereby improving the assembly quality of the gearbox.

[0079] Precisely control the pressure and displacement of press 106, selecting one as the primary control and the other as a secondary monitoring function. For example, real-time monitoring of the press force and displacement of press 106 and generating a graph facilitates engineering analysis and optimization of the press process. Through process testing, engineers selected a press force of 2.5 kN as the primary control to ensure consistent riveted shape during mass production. Each operation is riveted to the target force, with relatively loose monitoring of riveted displacement. This approach ensures consistent riveted shape and breakout force.

[0080] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. The riveting method of the output shaft of the gearbox assembly and the locking nut is characterized by: include, The gearbox housing (7) is placed on the floating support mechanism (3), and the flange backing mechanism (1) supports the lower side of the flange (4); The riveting surface (207) of the rivet cutter (2) is designed as an inclined surface, facing the output shaft (5); during the riveting process, the press (106) applies a vertical force to the rivet cutter (2); after the riveting surface (207) of the rivet cutter (2) contacts the upper end surface of the locking nut (6), the vertical pressure is converted into a horizontal component force and a vertical component force; wherein the horizontal component force causes the end surface of the locking nut (6) to deform, thereby achieving riveting with the output shaft (5); The rivet cutter (2) cooperates with the output shaft (5) and the flange (4) to achieve positioning; A riveting device for realizing a riveting method for a transmission assembly output shaft and a locking nut, comprising a rivet cutter (2), a flange backing mechanism (1) and a floating support mechanism (3); The floating support mechanism (3) is used to support the gearbox housing (7); The flange backing mechanism (1) is used to support the flange (4) and cooperate with the rivet cutter (2) to complete riveting; The flange back-rest mechanism (1) comprises a lifting bracket (103), a press (106), two back-rest claws (105), two back-rest supports (110) and two back-rest cylinders (109); The lifting bracket (103) is arranged on the fixed bracket (101); The press (106) is mounted on a lifting bracket (103); The two back-rest supports (110) are both fixed on the lower side of the lifting bracket (103) and are spaced apart. Each back-rest support (110) corresponds to a back-rest claw (105) and a back-rest cylinder (109). The back-rest claw (105) is slidably arranged on the back-rest support (110), and the two back-rest claws (105) can be moved closer or farther away. The back-rest cylinder (109) is fixed on the back-rest support (110) to drive the back-rest claw (105) to move.

2. A riveting device for implementing the riveting method of the transmission assembly output shaft and the locking nut as claimed in claim 1, characterized in that: The flange backing mechanism (1) further comprises two lifting cylinders (102) and a plurality of adjustment support blocks (111); the lifting cylinders (102) are fixedly mounted on the fixed bracket (101); the lifting bracket (103) is located above the fixed bracket (101) and is fixedly connected to the piston rod of the lifting cylinder (102); The adjustment support block (111) is located between the fixed support (101) and the lifting support (103), and supports the lifting support (103) after it is adjusted into place.

3. The riveting device according to claim 2, characterized in that: The flange backing mechanism (1) further includes two bracket adjustment cylinders (104), four bracket adjustment slide blocks (107) and two adjustment brackets (108); The four bracket adjustment sliders (107) are distributed at the four corners of the lower side of the lifting bracket (103) and are slidably connected to the lifting bracket (103); the two bracket adjustment sliders (107) located at the same end of the lifting bracket (103) are fixedly connected via the adjustment bracket (108); The support adjustment cylinder (104) is fixed on the lifting support (103), and the piston rod of the support adjustment cylinder (104) is fixedly connected to the adjustment support (108) and is used to drive the support adjustment slider (107) to move to or away from the position corresponding to the adjustment support block (111).

4. The riveting device according to claim 2, characterized in that: The counter-leaning claws (105) have a V-shaped groove, and the two counter-leaning claws (105) are jointly supported on opposite sides of the lower part of the flange (4).

5. The riveting equipment according to claim 2, characterized in that: The rivet cutter (2) comprises a guide sleeve (201), a positioning sleeve (202), a rivet head (203), a positioning column (204), a limiting pin (205), a connecting block (206) and an elastic member (208); The lower end of the guide sleeve (201) has a conical guide surface (210) adapted to the inner cavity shape of the flange (4) and capable of guiding the installation of the rivet cutter (2); The positioning sleeve (202) is slidably disposed in the guide sleeve (201), and the positioning sleeve (202) has an axially extending mounting hole (209) and a radially extending limiting hole (211); The positioning column (204) is clearance-matched with the mounting hole (209), and a positioning hole (213) is provided on the lower end of the positioning column (204) to match the end face of the output shaft (5); The connecting block (206) is fixed to the upper end of the positioning sleeve (202); The elastic member (208) is located in the mounting hole (209), and its two ends are respectively connected to the positioning column (204) and the connecting block (206); The limiting pin (205) is located in the limiting hole (211), with the middle portion passing through the positioning column (204) and both ends respectively located in the pin holes (212) on the guide sleeve (201); The rivet head (203) is fixed to the lower end of the positioning sleeve (202), and a through hole is provided in the rivet head (203), and the positioning column (204) extends into the through hole; a plurality of riveting surfaces (207) are provided on the inner wall of the through hole for achieving riveting of the locking nut (6) and the output shaft (5).

6. The riveting device according to claim 2, characterized in that: The floating support mechanism (3) comprises a floating positioning plate (31), a floating connecting plate (35), a floating cylinder (33), a guide rail (34), and a floating tray base (32); The guide rail (34) is arranged on the frame and connects multiple workstations; The floating tray base (32) is slidably arranged on the guide rail (34); The floating connection plate (35) is mounted on the floating tray base (32) and can float up and down relative to the floating tray base (32); The floating positioning plate (31) is fixed on the upper side of the floating connecting plate (35); The housing of the floating cylinder (33) is mounted on the floating tray base (32), and the piston rod extends upward and is fixedly connected to the floating connection plate (35).

7. The riveting device according to claim 6, characterized in that: A plurality of back-supporting columns (36) are also fixed on the lower side of the floating connection plate (35).

Images