A self-aligning installation tool for a cross-point joint bearing and method of use

Abstract

The application discloses a self-positioning installation tool suitable for a cross joint bearing and a use method thereof, and belongs to the technical field of airplane assembly and manufacturing. A guide rod is sequentially sleeved with a stop nut, a locking sleeve, a fixing sleeve, a guide sleeve, a ball transmission part and a transmission nut. The ball transmission part converts the rotary motion of the transmission nut into axial linear motion. The guide sleeve bears the bearing. The fixing sleeve is in transition fit with a cross joint hole. The fixing sleeve and the guide sleeve are coaxial through cooperation. The stop nut abuts the locking sleeve against a cross joint part. The rotary transmission nut pushes the guide sleeve with the bearing to move to the center of the cross joint hole until the installation is completed. The application has the self-positioning function, and the bearing installation axis is coincident with the cross joint axis through coordination between structures. Meanwhile, the application solves the problems of bearing surface knocking and time and labor consuming in manual installation, reduces the difficulty of bearing installation, and effectively improves the work efficiency of operators.

Description

Technical Field

[0001] This invention belongs to the field of aircraft assembly and manufacturing technology, and relates to a self-positioning installation tool suitable for interlocking joint bearings and its usage method. Background Technology

[0002] Currently, most bearings are installed using equipment, but this method is not suitable for all aircraft structures. Because some aircraft structures require precision machining of the joints to coordinate the relationships between components, by the time bearings are installed, the joints are already in a component state, lacking sufficient space and conditions for equipment installation. Therefore, manual installation or installation using tools is the only option.

[0003] Installing bearings in a cross-joint is a complex and highly technical task, with difficulties arising in two main aspects: First, cross-joints typically have complex structures, limited space, and irregular shapes, posing significant challenges to bearing positioning and installation. Due to space constraints, direct observation and operation are often difficult. Second, bearing installation requires extremely high precision; even the slightest deviation can cause the bearing to malfunction or even be damaged. In cross-joints, the bearing's installation position usually needs to be precisely aligned with other components, ensuring that the bearing's axis perfectly coincides with the joint's axis. Manual installation is extremely difficult to achieve successfully. Summary of the Invention

[0004] To address the aforementioned problems, this invention proposes a self-positioning installation tool and its method for use in intersection joint bearings. The tool's self-positioning solves the problem of limited space and positioning conditions when installing bearings, and through the coordination between structures, it can ensure that the bearing axis and the joint axis are completely coincident, thus achieving high-quality installation of intersection joint bearings.

[0005] The present invention adopts the following technical solution:

[0006] A self-positioning installation tool for intersecting joint bearings includes a guide rod 1, a fixing sleeve 2, a guide sleeve 3, a ball drive part 4, a drive nut 5, a handle 6, a locking sleeve 7, and a stop nut 8.

[0007] The guide rod 1 has a smooth middle section and threaded ends. The guide rod 1 is fitted with a stop nut 8, a locking sleeve 7, a fixing sleeve 2, a guide sleeve 3, a ball drive part 4, and a drive nut 5 in sequence. The smooth section passes through the locking sleeve 7, the fixing sleeve 2, and the guide sleeve 3, and the three can slide on the smooth section. The threaded part provides the stroke for the helical motion of the stop nut 8, the drive nut 5, and the ball drive part 4.

[0008] The transmission nut 5 is threadedly engaged with the rear end of the guide rod 1. The ball drive part 4 is located at the front end of the transmission nut 5 and is threadedly engaged with the guide rod 1. The transmission between the two is through ball drive, and the transmission method between them is similar to that of a ball screw. The transmission nut 5 rotates forward and applies a thrust to the ball drive part 4. The ball drive part 4 converts the helical rotation of the transmission nut 5 into axial linear motion.

[0009] The inner hole of the guide sleeve 3 is slidably fitted with the guide rod 1, and its outer diameter is fitted with the inner hole of the bearing to support the bearing. A boss is provided on the outer periphery of the rear end of the guide sleeve 3 for bearing positioning. An arc-shaped guide post is provided on the front end face to guide the movement of the fixed sleeve 2. Under the push of the ball transmission part 4, the guide sleeve 3 moves with the bearing toward the center of the intersection joint hole.

[0010] The inner diameter of the fixed sleeve 2 is set according to the outer diameter of the front end of the guide post on the guide sleeve 3, and its outer diameter is set according to the inner diameter of the intersection joint hole. The two are fitted together, and the fixed sleeve 2 and the guide sleeve 3 are fitted together to make them coaxial, thereby realizing the coaxiality of the bearing and the intersection joint hole.

[0011] The locking sleeve 7 is a cylindrical shell with a central hole on its front end face for sliding engagement with the guide rod 1. Its rear end face is open. The length of the locking sleeve 7 is greater than the length of the fixing sleeve 2, and its inner diameter is greater than the outer diameter of the fixing sleeve 2, allowing the fixing sleeve 2 to enter its interior. The rear end face of the locking sleeve 7 abuts against the intersection joint part. The locking nut 8 engages with the threaded front end of the guide rod 1, pressing the locking sleeve 7 onto the intersection joint, thus providing support for the entire self-positioning installation tool and preventing the axis of the self-positioning installation tool from misaligning with the axis of the intersection joint hole.

[0012] The handle 6 is fitted onto the transmission nut 5, and two cylinders are provided on its rear end face for easy turning of the transmission nut 5.

[0013] A method for using the above-mentioned self-positioning installation tool for interlocking joint bearings includes the following steps:

[0014] Step 1: Install the bearing onto guide sleeve 3;

[0015] Step 2: Install the fixing sleeve 2, guide sleeve 3, ball transmission part 4, and transmission nut 5 onto the guide rod 1 in sequence;

[0016] Step 3: Insert the fixing sleeve 2 into the intersection connector hole;

[0017] Step 4: Install the locking sleeve 7 onto the guide rod 1 from the front end, and install the stop nut 8 to press the locking sleeve 7 onto the surface of the intersection joint parts;

[0018] Step 5: Fit the handle 6 onto the transmission nut 5, rotate the handle 6 to drive the transmission nut 5 to rotate, the ball transmission part 4 converts the helical motion of the transmission nut 5 into horizontal linear motion, pushes the guide sleeve 3 to move the bearing into the intersection joint hole, and at the same time the guide sleeve 3 pushes the fixing sleeve 2 to be gradually squeezed out from the intersection joint hole, and the bearing gradually enters the intersection joint hole until the bearing is fully installed. At this time, the fixing sleeve 2 enters the locking sleeve 7.

[0019] The beneficial effects of this invention are as follows: This invention does not rely on the characteristics of the surrounding structure for positioning; it has its own self-positioning function, and through the coordination between structures, it ensures that the bearing mounting axis coincides with the axis of the intersection joint. At the same time, this tool and method can solve the problems of bearing surface damage and time-consuming and laborious installation caused by manual installation during bearing installation, reducing the difficulty of bearing installation and effectively improving the operator's work efficiency. Attached Figure Description

[0020] Figure 1 : A schematic diagram of the structure of a self-positioning installation tool applicable to intersecting joint bearings of the present invention;

[0021] Figure 2 : Schematic diagram of the guide rod structure;

[0022] Figure 3 : Schematic diagram of fixed sleeve structure, where (a) is the front view and (b) is the side view;

[0023] Figure 4 Schematic diagram of the guide sleeve structure;

[0024] Figure 5 Schematic diagram of the ball drive mechanism;

[0025] Figure 6 : Handle structure diagram;

[0026] Figure 7 : Schematic diagram of the clamping sleeve structure;

[0027] Figure 8 : Schematic diagram of the operation process.

[0028] The components include: 1. Guide rod; 2. Fixed sleeve; 3. Guide sleeve; 4. Ball drive unit; 5. Drive nut; 6. Handle; 7. Locking sleeve; 8. Stop nut. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this invention clearer, the specific embodiments of this invention will be described in detail below.

[0030] A self-positioning installation tool suitable for interlocking joint bearings, such as Figure 1It includes a guide rod 1, a fixed sleeve 2, a guide sleeve 3, a ball transmission part 4, a transmission nut 5, a handle 6, a locking sleeve 7, and a stop nut 8.

[0031] like Figure 2 The guide rod 1 has a smooth middle section and threaded ends. The guide rod 1 is fitted with a stop nut 8, a locking sleeve 7, a fixing sleeve 2, a guide sleeve 3, a ball drive part 4, and a drive nut 5 in sequence. The smooth section passes through the locking sleeve 7, the fixing sleeve 2, and the guide sleeve 3, and the three can slide on the smooth section. The threaded parts provide the stroke for the helical motion of the stop nut 8, the drive nut 5, and the ball drive part 4, respectively.

[0032] The transmission nut 5 is threadedly engaged with the rear end of the guide rod 1. The ball drive part 4 is located at the front end of the transmission nut 5 and is threadedly engaged with the guide rod 1. The transmission between the ball drive part 4 and the guide rod 1 is achieved through ball bearings, and the transmission method between them is similar to that of a ball screw. Figure 5 The transmission nut 5 rotates forward and applies a thrust to the ball transmission part 4, which in turn converts the helical rotation of the transmission nut 5 into axial linear motion.

[0033] like Figure 4 The inner hole of the guide sleeve 3 is slidably fitted with the guide rod 1, and its outer diameter is fitted with the inner hole of the bearing to support the bearing. A boss is provided on the outer periphery of the rear end of the guide sleeve 3 for bearing positioning. An arc-shaped guide post is provided on the front end face to guide the movement of the fixed sleeve 2. Under the push of the ball transmission part 4, the guide sleeve 3 moves with the bearing toward the center of the intersection joint hole.

[0034] like Figure 3 The inner diameter of the fixed sleeve 2 is set according to the outer diameter of the front end of the guide post on the guide sleeve 3, and its outer diameter is set according to the inner diameter of the intersection joint hole. The two are fitted together, and the fixed sleeve 2 and the guide sleeve 3 are fitted together to make them coaxial, thereby realizing the coaxiality of the bearing and the intersection joint hole.

[0035] like Figure 7 The locking sleeve 7 is a cylindrical shell with a central hole on its front end face for sliding engagement with the guide rod 1. Its rear end face is open. The length of the locking sleeve 7 is greater than the length of the fixing sleeve 2, and its inner diameter is greater than the outer diameter of the fixing sleeve 2, allowing the fixing sleeve 2 to enter its interior. The rear end face of the locking sleeve 7 abuts against the intersection joint part. The stop nut 8 engages with the threaded front end of the guide rod 1, pressing the locking sleeve 7 onto the intersection joint, thus providing support for the entire self-positioning installation tool and preventing the axis of the self-positioning installation tool from not coinciding with the axis of the intersection joint hole.

[0036] The handle 6 is fitted onto the transmission nut 5, and its rear end face is provided with two cylinders for effortless turning of the transmission nut 5, such as... Figure 6 .

[0037] A method for using the above-mentioned self-positioning installation tool applicable to interlocking joint bearings, such as... Figure 8 It includes the following steps:

[0038] Step 1: Install the bearing onto guide sleeve 3;

[0039] Step 2: Install the fixing sleeve 2, guide sleeve 3, ball transmission part 4, and transmission nut 5 onto the guide rod 1 in sequence;

[0040] Step 3: Insert the fixing sleeve 2 into the intersection connector hole;

[0041] Step 4: Install the locking sleeve 7 onto the guide rod 1 from the front end, and install the stop nut 8 to press the locking sleeve 7 onto the surface of the intersection joint parts;

[0042] Step 5: Fit the handle 6 onto the transmission nut 5, rotate the handle 6 to drive the transmission nut 5 to rotate, the ball transmission part 4 converts the helical motion of the transmission nut 5 into horizontal linear motion, pushes the guide sleeve 3 to move the bearing into the intersection joint hole, and at the same time the guide sleeve 3 pushes the fixing sleeve 2 to be gradually squeezed out from the intersection joint hole, and the bearing gradually enters the intersection joint hole until the bearing is fully installed. At this time, the fixing sleeve 2 enters the locking sleeve 7.

[0043] In summary, the above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A self-positioning installation tool suitable for interlocking joint bearings, characterized in that, It includes a guide rod (1), a fixed sleeve (2), a guide sleeve (3), a ball drive part (4), a drive nut (5), a locking sleeve (7), and a stop nut (8); The guide rod (1) has a smooth rod in the middle and threads at both ends. The guide rod (1) is fitted with a stop nut (8), a locking sleeve (7), a fixing sleeve (2), a guide sleeve (3), a ball drive part (4), and a drive nut (5) in sequence. The smooth rod passes through the locking sleeve (7), the fixing sleeve (2), and the guide sleeve (3), and the three can slide on the smooth rod. The transmission nut (5) is threadedly engaged with the rear end of the guide rod (1), and the ball drive part (4) is located at the front end of the transmission nut (5) and threadedly engaged with the guide rod (1), which converts the helical rotation of the transmission nut (5) into axial linear motion. The inner hole of the guide sleeve (3) is slidably fitted with the guide rod (1) and its outer diameter is fitted with the inner hole of the bearing to support the bearing. Its front end face is made of an arc-shaped guide post that extends forward to guide the movement of the fixed sleeve (2). The inner diameter of the fixed sleeve (2) is set according to the outer diameter of the front end of the guide post on the guide sleeve (3), and its outer diameter is set according to the inner diameter of the intersection joint hole. The fixed sleeve (2) and the guide sleeve (3) cooperate to make them coaxial, thereby realizing the coaxiality of the bearing and the intersection joint hole. The locking sleeve (7) is a cylindrical shell with a hole in the center of its front end face, which slides with the guide rod (1). Its rear end face is set as an open opening. The length of the locking sleeve (7) is greater than the length of the fixed sleeve (2), and the inner diameter is greater than the outer diameter of the fixed sleeve (2), so that the fixed sleeve (2) can enter its interior. The rear end face of the locking sleeve (7) abuts against the intersection joint part. The stop nut (8) is threaded with the front end of the guide rod (1) to press the locking sleeve (7) onto the intersection joint.

2. The self-positioning installation tool for intersecting joint bearings according to claim 1, characterized in that, The ball drive unit (4) and the guide rod (1) are connected by ball drive, and the transmission method between them is similar to that of a ball screw.

3. A self-positioning installation tool for intersecting joint bearings according to claim 1, characterized in that, The guide sleeve (3) has a boss on the outer periphery of its rear end for bearing positioning.

4. A self-positioning installation tool suitable for intersecting joint bearings according to claim 1, characterized in that, The fixing sleeve (2) is fitted with the intersection joint hole.

5. A self-positioning installation tool for intersecting joint bearings according to claim 1, characterized in that, The handle (6) is fitted onto the transmission nut (5) for easy turning of the transmission nut (5).

6. A self-positioning installation tool for intersecting joint bearings according to claim 5, characterized in that, The handle (6) has two cylinders on its rear end face.

7. A method of using the self-positioning installation tool for intersecting joint bearings as described in any one of claims 1-6, characterized in that, Includes the following steps: Step 1: Install the bearing onto the guide sleeve (3); Step 2: Install the fixing sleeve (2), guide sleeve (3), ball transmission part (4), and transmission nut (5) onto the guide rod (1) in sequence; Step 3: Insert the fixing sleeve (2) into the intersection joint hole; Step 4: Install the locking sleeve (7) on the guide rod (1) from the front end, and install the stop nut (8) to press the locking sleeve (7) onto the surface of the intersection joint parts; Step 5: Rotate the transmission nut (5), and the ball transmission part (4) will convert the helical motion of the transmission nut (5) into a horizontal linear motion, pushing the guide sleeve (3) to move the bearing into the intersection joint hole. At the same time, the guide sleeve (3) pushes the fixed sleeve (2) to be gradually squeezed out from the intersection joint hole, and the bearing gradually enters the intersection joint hole until the bearing is fully installed. At this time, the fixed sleeve (2) enters the locking sleeve (7).

8. The method of using a self-positioning installation tool suitable for intersecting joint bearings according to claim 7, characterized in that, In the fifth step, the handle (6) is fitted onto the transmission nut (5), and the handle (6) is rotated to drive the transmission nut (5) to rotate.

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