Device for achieving multi-directional tightening of nut

Abstract

The utility model provides a device for tightening a nut in multiple directions, which comprises a tightening machine driver, a double-cardan-shaft transmission mechanism, a sleeve mechanism sleeved outside the double-cardan-shaft transmission mechanism, a driving mechanism and a parallelogram connecting rod mechanism, wherein the driving mechanism and the parallelogram connecting rod mechanism are mounted on the sleeve mechanism; the double-universal-shaft transmission mechanism comprises a torque input shaft, a first universal joint, a connecting shaft, a second universal joint and a torque output shaft, the torque input shaft, the connecting shaft and the torque output shaft are each connected with two bearings, the torque output shaft is connected with a tightening tail end, and the sleeve mechanism comprises a first sleeve, a second sleeve and a third sleeve. The parallelogram connecting rod mechanism comprises a first connecting rod and a second connecting rod, the driving mechanism is installed on the first sleeve, and the output end is connected with one end of the first connecting rod or the second connecting rod. According to the multi-directional nut tightening device, various types of nuts can be tightened, and multi-directional nut tightening is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical equipment, in particular to a device for solving the multi-directional tightening of nuts. Background Art

[0002] The blind cavity of an aircraft engine has a narrow space, complex working conditions, and sometimes the depth and turning conditions make it difficult for humans to simply tighten the bolts with tools such as wrenches, and can only be tightened by designing special mechanical devices. However, the bolt types used in aircraft engines are characterized by a variety of styles and a small number, so it is very important to consider the versatility of the mechanical device. There is currently a nut assembly device in the blind cavity of an aircraft engine, which requires the blind cavity structure to be placed horizontally and the blind cavity structure to be entered vertically to tighten the nut. However, in actual engineering, the structure of the blind cavity of an aircraft engine is complex and diverse. Due to size and structural design reasons, there will be a situation where the nut needs to be tightened at an angle, that is, the axis of the tightening nut and the tightening rod do not coincide. The blind cavity structure may require the nut to be tightened on the side wall, or it may be necessary to tighten the nut horizontally after turning multiple bends, that is, the blind cavity structure may need to turn-tighten again, and the turning may be at a right angle or at an oblique angle. Turning at an oblique angle will face the situation where the tightening nut and the axis of the servo programmable tightening equipment do not coincide, and the existing technology still cannot solve this problem well. Therefore, it is necessary to consider the problem of tightening multiple nuts in multiple directions in a narrow space. Utility Model Content

[0003] According to the technical problem raised above, a device for solving the multi-directional tightening of nuts is provided.

[0004] The technical means adopted by the utility model are as follows:

[0005] A device for solving the multi-directional tightening of nuts, comprising: a tightening machine drive, a double cardan shaft transmission mechanism, a sleeve mechanism sleeved outside the double cardan shaft transmission mechanism, and a drive mechanism and a parallelogram connecting rod mechanism installed on the sleeve mechanism, wherein the output end of the tightening machine drive is connected to the double cardan shaft transmission mechanism;

[0006] The dual cardan shaft transmission mechanism comprises a torque input shaft, a first cardan joint, a connecting shaft, a second cardan joint and a torque output shaft, one end of the torque input shaft is connected to the output end of the tightening machine base, the tightening machine base is connected to the mechanical arm, the other end of the torque input shaft is connected to one side of the first cardan joint, the other side of the first cardan joint is connected to one end of the connecting shaft, the other end of the connecting shaft is connected to one side of the second cardan joint, the other side of the second cardan joint is connected to one end of the torque output shaft, the other end of the torque output shaft is connected to a tightening end, and the tightening end is used to cooperate with the nut to be tightened;

[0007] The sleeve mechanism comprises a first sleeve, a second sleeve and a third sleeve, one side of the first sleeve is fixedly connected to the tightening machine base, the other side of the first sleeve is rotatably connected to one side of the second sleeve, the other side of the second sleeve is rotatably connected to one side of the third sleeve, the first sleeve is sleeved on the outside of the torque input shaft, the second sleeve is sleeved on the outside of the connecting shaft, and the third sleeve is sleeved on the outside of the torque output shaft;

[0008] The torque input shaft is connected to two first bearings, and the two first bearings are matched and connected with the inner wall of the first sleeve; the connecting shaft is connected to two second bearings, and the two second bearings are matched and connected with the inner wall of the second sleeve; the torque output shaft is connected to two third bearings, and the two third bearings are matched and connected with the inner wall of the third sleeve;

[0009] The parallelogram linkage mechanism comprises a first link and a second link that are symmetrically and parallelly arranged, wherein one end of the first link and the second link are respectively rotatably connected to two sides of the first sleeve, and the other end of the first link and the second link are respectively rotatably connected to two sides of the third sleeve;

[0010] The driving mechanism is mounted on the first sleeve, and the output end is connected to one end of the first connecting rod or the second connecting rod.

[0011] Furthermore, the driving mechanism includes a motor and a gear mechanism, the motor is mounted on the outer wall of the first sleeve, the output end of the motor is connected to the gear mechanism, and the gear mechanism is connected to one end of the first connecting rod or the second connecting rod.

[0012] Furthermore, the motor is mounted on a shaft frame, and the shaft frame is mounted on the outer wall of the first sleeve.

[0013] Furthermore, the gear mechanism adopts a bevel gear mechanism, including a first bevel gear and a second bevel gear, the output end of the motor is connected to the first bevel gear, the first bevel gear is meshingly connected to the second bevel gear, and the second bevel gear is connected to one end of the first connecting rod or the second connecting rod.

[0014] Furthermore, a third connecting rod and a fourth connecting rod are respectively arranged on both sides of the end of the third sleeve close to the second sleeve, the other ends of the first connecting rod and the second connecting rod are respectively rotatably connected to the outer sides of one end of the third connecting rod and the fourth connecting rod, and the other ends of the second sleeve are respectively rotatably connected to the inner sides of the other ends of the third connecting rod and the fourth connecting rod.

[0015] Further, the first sleeve is hinged to the first connecting rod and the second connecting rod through a pin, the first sleeve is hinged to the second sleeve through a pin, the second sleeve is hinged to the third sleeve through a pin, and the third sleeve is hinged to the first connecting rod and the second connecting rod through a pin.

[0016] Furthermore, a baffle is connected to the tightening machine base, and the baffle is located on the outer side of the sleeve mechanism.

[0017] Furthermore, the first sleeve is coaxially arranged with the torque input shaft.

[0018] Furthermore, the tightening end adopts a hexagonal wrench.

[0019] Compared with the prior art, the utility model has the following advantages:

[0020] 1. The utility model can realize the tightening of nuts of various styles and the tightening of nuts in multiple directions.

[0021] 2. The utility model realizes the angle control of the parallelogram linkage mechanism by driving a pair of bevel gears through the motor, driving the movement of the two sleeves at the end, positioning the last sleeve to the nut to be tightened, and realizing multi-directional tightening of the nut. The end sleeve for tightening the nut is replaceable, so as to realize the tightening of nuts of different models.

[0022] 3. The double universal joint of the utility model realizes multi-directional tightening, solving the problem of tightening the nut when the axis of the tightening nut and the servo programmable tightening equipment do not coincide. At the same time, a baffle is provided as a reaction force fulcrum to solve the problem of the reaction force damaging the mechanism.

[0023] 4. The utility model has a wide range of applications and can be used in multiple places, including places where the rod and the tightening nut are not in the same line, and is not limited to application in aircraft engines.

[0024] 5. The utility model can realize nut tightening for structures that need to be tightened and are placed in any direction (including but not limited to horizontal placement and vertical placement).

[0025] Based on the above reasons, the utility model can be widely promoted in the fields of nut tightening and the like. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0027] Figure 1 It is a structural schematic diagram of the utility model.

[0028] Figure 2 It is a left view of the utility model.

[0029] Figure 3It is the right view of the utility model.

[0030] Figure 4 It is a rear view of the utility model.

[0031] Figure 5 It is a top view of the utility model.

[0032] Figure 6 It is a schematic diagram of the internal structure of the utility model.

[0033] Figure 7 for Figure 6 Schematic diagram of the local structure.

[0034] In the figure: 1. tightening machine drive; 2. first sleeve; 3. second sleeve; 4. third sleeve; 41. third connecting rod; 42. fourth connecting rod; 5. baffle; 6. motor; 7. parallelogram linkage; 71. first connecting rod; 72. second connecting rod; 8. tightening end; 9. tightening machine base; 10. bevel gear mechanism; 11. double cardan shaft transmission mechanism; 12. torque input shaft; 13. first cardan joint; 14. connecting shaft; 15. second cardan joint; 16. torque output shaft; 17. first bearing; 18. second bearing; 19. third bearing; 20. retaining spring. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] The blind cavity structure of aircraft engines is diverse. The current structure considers directly entering the blind cavity and tightening the nut in the blind cavity in a straight direction. However, the special size design and the narrow space require the rod to be tilted to enter the blind cavity to tighten the nut. The rod is tilted, the nut is in a horizontal state, and the nut needs to be tightened horizontally. The utility model adds a universal joint design, so that even if the rod is tilted, the addition of the universal joint can make the end sleeve of the tightening nut in a horizontal state, and the nut can still be tightened in any direction. The utility model solves the problem of tightening the nut at an angle after the rod turns.

[0037] The utility model provides a device for solving the multi-directional tightening of nuts, comprising an inner layer mechanism and an outer layer mechanism.

[0038] The inner mechanism is composed of a double universal joint, one end of which is connected to the output shaft of the servo programmable tightening equipment (tightening machine drive 1, existing equipment) as the input of torque. The other end of the double universal joint mechanism is the end of the tightening device, which is engaged with the nut and transfers the torque to tighten the nut.

[0039] The outer mechanism consists of a three-section sleeve and a parallelogram linkage. The three-section sleeve and the corresponding dual cardan shaft axis are axially positioned through the universal joint's spherical bearing, and the three-section sleeve controls the orientation of the universal joint axis. The movement of the parallelogram linkage crank, that is, the rotation angle, is achieved by the control motor through a pair of bevel gear meshing transmission. When the parallelogram crank rotates a certain angle, the parallelogram linkage mechanism drives the end two-section sleeve to move, and the end sleeve is positioned to the nut to be tightened, thereby achieving multi-directional tightening of the nut.

[0040] Specifically, Figure 1-6 As shown, the device for solving the multi-directional tightening of nuts of the utility model comprises: a tightening machine drive 1, a dual cardan shaft transmission mechanism 11, a sleeve mechanism sleeved outside the dual cardan shaft transmission mechanism 11, and a driving mechanism and a parallelogram connecting rod mechanism 7 installed on the sleeve mechanism, wherein the output end of the tightening machine drive 1 is connected to the dual cardan shaft transmission mechanism 11;

[0041] The double cardan shaft transmission mechanism 11 includes a torque input shaft 12, a first cardan joint 13, a connecting shaft 14, a second cardan joint 15 and a torque output shaft 16. One end of the torque input shaft 12 is connected to the output end of the tightening machine base 9, and the tightening machine base 9 is connected to the end of the existing mechanical arm. The other end of the torque input shaft 12 is connected to one side of the first cardan joint 13, and the other side of the first cardan joint 13 is connected to one end of the connecting shaft 14. The other end of the connecting shaft 14 is connected to one side of the second cardan joint 15, and the other side of the second cardan joint 15 is connected to one end of the torque output shaft 16. The other end of the torque output shaft 16 is connected with a tightening end 8 (using an inner hexagonal wrench). The tightening end 8 matches the nut to be tightened, is buckled with the nut and then tightened, and the tightening end 8 can be replaced according to different types of nuts; the first cardan joint 13 and the second cardan joint 15 can both adopt the existing cardan joint structure, which is composed of a cardan joint fork, a cross shaft, a bearing and other components;

[0042] The sleeve mechanism includes a first sleeve 2, a second sleeve 3 and a third sleeve 4. One side of the first sleeve 2 is fixedly connected to the tightening machine base 9, and the other side is rotatably connected to one side of the second sleeve 3. The other side of the second sleeve 3 is rotatably connected to one side of the third sleeve 4. The first sleeve 2 is sleeved on the outside of the torque input shaft 12, the second sleeve 3 is sleeved on the outside of the connecting shaft 14, and the third sleeve 4 is sleeved on the outside of the torque output shaft 16.

[0043] Two coaxial first bearings 17 are connected to the torque input shaft 12, and the two first bearings 17 are connected to the inner wall of the first sleeve 2; two coaxial second bearings 18 are connected to the connecting shaft 14, and the two second bearings 18 are connected to the inner wall of the second sleeve 3; two coaxial third bearings 19 are connected to the torque output shaft 16, and the two third bearings 19 are connected to the inner wall of the third sleeve 4; a retaining spring 20 is provided at the connection between each bearing and the shaft.

[0044] The parallelogram linkage mechanism 7 includes a first link 71 and a second link 72 that are symmetrically and parallelly arranged, one end of the first link 71 and the second link 72 are respectively rotatably connected to the two sides of the first sleeve 2, and the other end thereof are respectively rotatably connected to the two sides of the third sleeve 4;

[0045] The driving mechanism is mounted on the first sleeve 2 , and the output end is connected to one end of the first connecting rod 71 or the second connecting rod 72 .

[0046] As a preferred embodiment, the driving mechanism includes a motor 6 and a gear mechanism. The motor 6 is installed on the outer wall of the first sleeve 2. The output end of the motor 6 is connected to the gear mechanism, and the gear mechanism is connected to one end of the first connecting rod 71 or the second connecting rod 72.

[0047] As a preferred embodiment, the motor 6 is mounted on a shaft frame, and the shaft frame is mounted on the outer wall of the first sleeve 2. The motor 6 is used to control the crank angle to achieve the deflection of the double universal hinge.

[0048] As a preferred embodiment, the gear mechanism adopts a bevel gear mechanism 10, including a first bevel gear and a second bevel gear, the output end of the motor 6 is connected to the first bevel gear, the first bevel gear and the second bevel gear are meshed and connected, and the second bevel gear is connected to one end of the first connecting rod 71 or the second connecting rod 72.

[0049] As a preferred embodiment, a third connecting rod 41 and a fourth connecting rod 42 are respectively provided on both sides of the end of the third sleeve 4 close to the second sleeve 3, and the other ends of the first connecting rod 71 and the second connecting rod 72 are respectively rotatably connected to the outer sides of one end of the third connecting rod 41 and the fourth connecting rod 42, and the other end of the second sleeve 3 is respectively rotatably connected to the inner sides of the other ends of the third connecting rod 41 and the fourth connecting rod 42.

[0050] As a preferred embodiment, the first sleeve 2 is hinged to the first connecting rod 71 and the second connecting rod 72 through a pin, the first sleeve 2 is hinged to the second sleeve 3 through a pin, the second sleeve 3 is hinged to the third sleeve 4 through a pin, and the third sleeve 4 is hinged to the first connecting rod 71 and the second connecting rod 72 through a pin.

[0051] As a preferred embodiment, a baffle plate 5 is connected to the tightening machine base 9. The baffle plate 5 is located on the outer side of the sleeve mechanism and serves as a fulcrum for the reaction force of the tightening torque.

[0052] As a preferred embodiment, the first sleeve 2 is coaxially arranged with the torque input shaft 12 .

[0053] The utility model can realize the tightening of nuts at the blind cavity of an aero-engine, and can realize the tightening problem of various nut styles by replacing the sleeve.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A device for solving the multi-directional tightening of nuts, characterized in that: include: A tightening machine drive (1), a dual cardan shaft transmission mechanism (11), a sleeve mechanism sleeved outside the dual cardan shaft transmission mechanism (11), and a drive mechanism and a parallelogram connecting rod mechanism (7) mounted on the sleeve mechanism, wherein the output end of the tightening machine drive (1) is connected to the dual cardan shaft transmission mechanism (11); The dual cardan shaft transmission mechanism (11) comprises a torque input shaft (12), a first cardan joint (13), a connecting shaft (14), a second cardan joint (15) and a torque output shaft (16), one end of the torque input shaft (12) is connected to the output end of the tightening machine base (9), the tightening machine base (9) is connected to the mechanical arm, the other end of the torque input shaft (12) is connected to one side of the first cardan joint (13), the other side of the first cardan joint (13) is connected to one end of the connecting shaft (14), the other end of the connecting shaft (14) is connected to one side of the second cardan joint (15), the other side of the second cardan joint (15) is connected to one end of the torque output shaft (16), and the other end of the torque output shaft (16) is connected to a tightening end (8), and the tightening end (8) is used to cooperate with the nut to be tightened; The sleeve mechanism comprises a first sleeve (2), a second sleeve (3) and a third sleeve (4); one side of the first sleeve (2) is fixedly connected to a tightening machine base (9), and the other side is rotatably connected to one side of the second sleeve (3); the other side of the second sleeve (3) is rotatably connected to one side of the third sleeve (4); the first sleeve (2) is sleeved on the outside of a torque input shaft (12), the second sleeve (3) is sleeved on the outside of a connecting shaft (14), and the third sleeve (4) is sleeved on the outside of a torque output shaft (16); The torque input shaft (12) is connected to two first bearings (17), and the two first bearings (17) are connected in a cooperative manner to the inner wall of the first sleeve (2); the connecting shaft (14) is connected to two second bearings (18), and the two second bearings (18) are connected in a cooperative manner to the inner wall of the second sleeve (3); the torque output shaft (16) is connected to two third bearings (19), and the two third bearings (19) are connected in a cooperative manner to the inner wall of the third sleeve (4); The parallelogram linkage mechanism (7) comprises a first link (71) and a second link (72) which are symmetrically and parallelly arranged, one end of the first link (71) and the second link (72) being rotatably connected to two sides of the first sleeve (2) respectively, and the other end of the first link (71) and the second link (72) being rotatably connected to two sides of the third sleeve (4) respectively; The driving mechanism is mounted on the first sleeve (2), and the output end is connected to one end of the first connecting rod (71) or the second connecting rod (72).

2. The device for solving the multi-directional tightening of nuts according to claim 1, characterized in that: The driving mechanism comprises a motor (6) and a gear mechanism, wherein the motor (6) is mounted on the outer wall of the first sleeve (2), the output end of the motor (6) is connected to the gear mechanism, and the gear mechanism is connected to one end of the first connecting rod (71) or the second connecting rod (72).

3. The device for solving the multi-directional tightening of nuts according to claim 2, characterized in that: The motor (6) is mounted on a shaft frame, and the shaft frame is mounted on the outer wall of the first sleeve (2).

4. The device for solving the multi-directional tightening of nuts according to claim 2, characterized in that: The gear mechanism adopts a bevel gear mechanism (10) comprising a first bevel gear and a second bevel gear, the output end of the motor (6) is connected to the first bevel gear, the first bevel gear is meshingly connected to the second bevel gear, and the second bevel gear is connected to one end of the first connecting rod (71) or the second connecting rod (72).

5. The device for solving the multi-directional tightening of nuts according to claim 1, characterized in that: A third connecting rod (41) and a fourth connecting rod (42) are respectively arranged on both sides of the end of the third sleeve (4) close to the second sleeve (3); the other ends of the first connecting rod (71) and the second connecting rod (72) are respectively rotatably connected to the outer sides of one ends of the third connecting rod (41) and the fourth connecting rod (42); and the other ends of the second sleeve (3) are respectively rotatably connected to the inner sides of the other ends of the third connecting rod (41) and the fourth connecting rod (42).

6. The device for solving the multi-directional tightening of nuts according to claim 1, characterized in that: The first sleeve (2) is hinged to the first connecting rod (71) and the second connecting rod (72) via a pin, the first sleeve (2) is hinged to the second sleeve (3) via a pin, the second sleeve (3) is hinged to the third sleeve (4) via a pin, and the third sleeve (4) is hinged to the first connecting rod (71) and the second connecting rod (72) via a pin.

7. The device for solving the multi-directional tightening of nuts according to claim 1, characterized in that: The tightening machine base (9) is connected to a baffle plate (5), and the baffle plate (5) is located on the outer side of the sleeve mechanism.

8. The device for solving the multi-directional tightening of nuts according to claim 1, characterized in that: The first sleeve (2) is coaxially arranged with the torque input shaft (12).

9. The device for solving the multi-directional tightening of nuts according to claim 1, characterized in that: The tightening end (8) adopts a hexagonal wrench.

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