Assembling tool and method for axially fixing multiple parts

Abstract

The invention provides an assembly tool and an assembly method for axially fixing a plurality of parts, and belongs to the field of mechanical part assembly. The problems that an existing common axial fixing tool is complex in operation, low in efficiency and limited in applicability, and a good axial fixing effect is difficult to achieve when large-scale and multiple parts are axially fixed and assembled are solved. And particularly, when a cavity with a complex shape exists in the first part to be fixed, the first part to be fixed is difficult to be assembled with subsequent parts in series through a conventional tool. The device comprises a mandrel and a locking nut, a rotary limiting block is rotatably fixed to the penetrating end of the mandrel, the center line of a rotary shaft of the rotary limiting block is perpendicular to the center line of the mandrel, and the length of the rotary limiting block is larger than the diameter of the mandrel; and the locking nut is in threaded connection with the tail end of the core shaft. The tool is mainly used for quickly assembling a plurality of parts in an axial fixing manner.

Description

Technical Field

[0001] The invention belongs to the field of mechanical parts assembly, and in particular relates to an assembly tool and an assembly method for axially fixing multiple parts. Background Art

[0002] In modern machinery manufacturing, multiple parts often need to be axially fixed. Especially in the fields of large-scale machinery and equipment, precision instrument manufacturing, aerospace, etc., the axial fixed assembly of multiple parts has a vital impact on the performance, stability and service life of the equipment.

[0003] However, the commonly used axial fixing tools currently have problems such as complex operation, low efficiency, and limited applicability. When faced with large-scale, multi-component axial fixing assemblies, it is difficult to achieve a good axial fixing effect. In particular, when there is a complex-shaped cavity inside the first part to be fixed, conventional tools are difficult to assemble it in series with subsequent parts. Summary of the invention

[0004] In view of this, in order to solve the problems of complex operation, low efficiency, and limited applicability of the currently commonly used axial fixing tools, it is difficult to achieve a good axial fixing effect when facing the axial fixing assembly of large-scale, multi-component parts. In particular, when there is a complex-shaped cavity inside the first part to be fixed, it is difficult for conventional tools to assemble it in series with subsequent parts. The present invention proposes an assembly tool and assembly method for axially fixing through the parts. Through the precise control of the three key states of the mechanical structure, fast and stable axial fixing of large-scale, multi-component parts is achieved, and it is easy to use and disassemble, realizing the replaceability of the tool. This tool is suitable for the axial fixing assembly of large-scale, multi-component products, providing a new tool for the machinery manufacturing industry, and has broad application prospects.

[0005] To achieve the above object, the present invention adopts the following technical solution: an assembly tool for axially fixing multiple parts, characterized in that it includes a core shaft and a locking nut,

[0006] The rotation limit block is rotatably fixed to the insertion end of the mandrel, the center line of the rotation axis is perpendicular to the center line of the mandrel, and the length of the rotation limit block is greater than the diameter of the mandrel;

[0007] The locking nut is threadedly connected to the rear end of the core shaft.

[0008] Furthermore, the center line of the rotating shaft is also bisected by the center line of the core shaft.

[0009] Furthermore, the rotation limit block is in the shape of a cuboid, the core shaft is provided with a groove, the rotation limit block is located in the groove, and the rotation limit block does not interfere with the groove when rotating.

[0010] An assembly method of an assembly tool for axially fixing multiple parts as described in any one of the above three items, comprising the following steps:

[0011] S1. Rotate the rotation limit block to a horizontal position;

[0012] S2, passing the assembly tool through the plurality of parts to be axially fixed;

[0013] S3, rotating the rotation limit block to a position perpendicular to the center line of the mandrel;

[0014] S4. Rotate the locking nut until it fits the tail part, and continue to rotate the locking nut to drive the mandrel to move from the inside of the part to the outside;

[0015] S5. The movement of the mandrel drives the rotation limit block to fit firmly with the front end parts, stops rotating the locking nut, and completes the axial fixation of multiple parts.

[0016] Furthermore, the core shaft is also provided with a through hole along the axial direction.

[0017] Furthermore, the core shaft diameter is smaller than the diameter of the inner cavity entrance of the assembled part, the length of the rotation limit block is larger than the diameter of the inner cavity entrance of the part, the core shaft is inserted into the inner cavity of the part, and the rotation limit block fits with the inner cavity of the part to fix the part.

[0018] Furthermore, a hanger is provided at the rear end of the core shaft, and the hanger is threadedly connected to the core shaft.

[0019] An assembly method of an assembly tool for axially fixing multiple parts as described in any one of the above three items, comprising the following steps:

[0020] S1. Rotate the rotation limit block to a horizontal position;

[0021] S2, inserting the assembly tool into the multiple parts to be axially positioned, and the mandrel enters the cavity of the leftmost part to be axially positioned;

[0022] S3, insert the tool into the through hole to move the rotation limit block;

[0023] S4, rotating the rotation limit block to a position perpendicular to the center line of the mandrel;

[0024] S5. Rotate the locking nut until it fits the tail part, and continue to rotate the locking nut to drive the mandrel to move from the inside of the part to the outside;

[0025] S6. The movement of the mandrel drives the rotation limit block to fit with the tail boss of the leftmost chamber with the fixed parts, and the rotation of the locking nut is stopped to complete the axial fixation of multiple parts.

[0026] Furthermore, the mandrel is processed according to the internal dimensions of the parts to be assembled so that the multiple parts to be assembled are located on the same axis after passing through the mandrel.

[0027] Compared with the prior art, the assembly tool and assembly method for axially fixing through a part according to the present invention have the following beneficial effects:

[0028] 1. The present invention has a simple structure and is easy to operate, and can realize rapid axial fixation of large and multiple parts.

[0029] 2. The present invention has a small number of parts, is easy to install and disassemble, and has strong replaceability of tools.

[0030] 3. The present invention has wide applicability. In addition to passing through a part and having the limit block fit against the outer surface of the part for axial fixation, when facing special parts with complex-shaped cavities, the limit block can fit against the inner surface of the part cavity to achieve axial fixed assembly of the special parts and subsequent parts.

[0031] 4. The present invention adds a hanging seat to facilitate the lifting and transportation of the product after assembly.

[0032] 5. The present invention does not have strict size requirements for the mandrel, and the limit block can be inserted into the part. Therefore, the mandrel can be processed according to the size of the part to be assembled, and the part can be axially fixed while the coaxial assembly of the part is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0034] Figure 1 It is a schematic overall structural diagram of the assembly tool of the present invention;

[0035] Figure 2 A cross-sectional view of an assembly tool of the present invention passing through a plurality of parts to be axially fixed;

[0036] Figure 3 It is a cross-sectional view of the assembly tool of the present invention when the rotation limit block is rotated to a position perpendicular to the center line of the mandrel;

[0037] Figure 4 A cross-sectional view of the assembly tool of the present invention completing the axial fixation of multiple parts;

[0038] Figure 5 It is a cross-sectional view of the assembly tool of the present invention when it is used to enter the inner cavity of a part to be assembled into a non-transparent structure;

[0039] Figure 6It is a cross-sectional view of the assembly tool of the present invention rotating the rotation limit block from the through hole to a position perpendicular to the center line of the mandrel;

[0040] Figure 7 A cross-sectional view of the assembly tool of the present invention completing the axial fixation of multiple parts including special parts;

[0041] Figure 8 A cross-sectional view of an assembly tool of the present invention with a hanger installed.

[0042] In the figure: 1- spindle; 2- locking nut; 3- rotation limit block; 4- through hole; 5- hanging seat; 11- part one to be assembled; 22- part two to be assembled; 33- part three to be assembled; 44- part four to be assembled with an inner cavity; 55- part five to be assembled; 66- part six to be assembled. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely explain the technical solutions in the embodiments of the present invention. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict, and the embodiments described are only part of the embodiments of the present invention, not all of the embodiments.

[0044] 1. Specific implementation method 1, see Figure 1-4 In this embodiment, the assembly tool for passing through a part for axial fixing comprises a core shaft 1 and a locking nut 2.

[0045] The rotation limit block 3 is rotatably fixed to the insertion end of the core shaft 1, and the center line of the rotation axis is perpendicular to the center line of the core shaft 1. The length of the rotation limit block 3 is greater than the diameter of the core shaft 1.

[0046] The locking nut 2 is threadedly connected to the rear end of the core shaft 1 .

[0047] The center line of the rotating shaft is also bisected by the center line of the mandrel 1 .

[0048] The rotation limit block 3 is initially located horizontally or tilted at a certain angle, and when the mandrel 1 completely passes through the multiple parts to be axially positioned, the rotation limit block 3 does not interfere with the inner surface of the parts. The rotation limit block 3 is rotated to a vertical position with the mandrel 1, and the rotation limit block 3 and the locking nut 2 act on the two ends of the multiple parts to be assembled as a whole, driving the locking nut 2 to complete the tightening of the multiple parts to be assembled as a whole.

[0049] The invention has a simple structure and is easy to operate. The rapid axial fixation of multiple parts to be assembled can be completed through the three steps of insertion, rotation and fixation. The threaded connection is simple in structure, reliable in connection, and convenient in assembly and disassembly. The tight engagement of the thread can provide a high connection strength.

[0050] The rotation limit block 3 is in the shape of a cuboid, the core shaft 1 is provided with a groove, the rotation limit block 3 is located in the groove, and the rotation limit block 3 does not interfere with the groove when rotating.

[0051] The rotation limit block 3 is placed in the groove, which reduces the size of the tool as a whole. The groove reduces the consumption of raw materials, reduces the overall weight of the tool, and makes the tool easier to operate.

[0052] The assembly method of the assembly tool for axially fixing multiple parts is characterized by adopting the following steps:

[0053] S1, rotating the rotation limit block 3 to a horizontal position;

[0054] S2, passing the assembly tool through the plurality of parts to be axially fixed;

[0055] S3, rotating the rotation limit block 3 to a position perpendicular to the center line of the mandrel 1;

[0056] S4, rotate the locking nut 2 until it fits with the tail part, and continue to rotate the locking nut 2 to drive the core shaft 1 to move outward from the inside of the part;

[0057] S5, the core shaft 1 moves to drive the rotation limit block 3 to fit firmly with the front end part, and the rotation of the locking nut 2 is stopped, completing the axial fixation of multiple parts.

[0058] The assembly method has simple steps and quick operation, which improves production efficiency, greatly shortens the assembly cycle, and greatly improves the overall output of the production line.

[0059] 2. Specific implementation method 2, see Figure 5-8 To explain this embodiment, the main difference between Specific Embodiment 2 and Specific Embodiment 1 is that they target different parts. Specific Embodiment 1 is mainly used for axial fixation of multiple penetrating parts, while for some products, the first part 1 to be assembled has a chamber inside, which is not a completely transparent structure, and the core shaft 1 cannot pass through it. In order to achieve axial fixation from both ends, the structure of Specific Embodiment 2 is designed.

[0060] In this specific implementation, the core shaft 1 is further provided with a through hole 4 along the axial direction.

[0061] The diameter of the core shaft 1 is smaller than the diameter of the inner cavity entrance of the part to be assembled, and the length of the rotation limit block 3 is larger than the diameter of the inner cavity entrance of the part. The core shaft 1 is inserted into the inner cavity of the part, and the rotation limit block 3 fits with the inner cavity of the part to fix the part.

[0062] In this specific embodiment, the tail of the chamber of the part to be assembled at the head has a boss, the mandrel 1 can enter the chamber, and the rotation limit block 3 can engage with the boss in the chamber after rotation. However, the rotation limit block 3 is located inside the chamber and cannot be directly rotated, so a through hole 4 is provided, and a tool is inserted through the through hole 4 to rotate the rotation limit block 3 to make it rotate to the position of engaging with the boss in the chamber, and finally tightened by the locking nut 2 to complete the axial fixed assembly of multiple parts containing the inner cavity.

[0063] The tail end of the mandrel 1 is also provided with a hanging seat 5, and the hanging seat 5 is threadedly connected to the mandrel 1. The installation of the hanging seat facilitates the hoisting and transportation of the finished product and improves the production speed.

[0064] The assembly method of the assembly tool for axially fixing multiple parts is characterized by adopting the following steps:

[0065] S1, rotating the rotation limit block 3 to a horizontal position;

[0066] S2, inserting the assembly tool into the multiple parts to be axially positioned, and the mandrel 1 enters the chamber of the leftmost part to be axially positioned;

[0067] S3, insert the tool into the through hole 4 to move the rotation limit block 3;

[0068] S4, rotating the rotation limit block 3 to a position perpendicular to the center line of the mandrel 1;

[0069] S5, rotate the locking nut 2 until it fits with the tail part, and continue to rotate the locking nut 2 to drive the core shaft 1 to move outward from the inside of the part;

[0070] S6, the core shaft 1 moves to drive the rotation limit block 3 to fit with the tail boss of the leftmost chamber with the fixed parts, and the rotation of the locking nut 2 is stopped to complete the axial fixation of multiple parts.

[0071] This assembly method is widely applicable, and the flexible and changeable assembly strategy can quickly respond to design changes. It is suitable for axial fixation of parts of different shapes and can adapt to the rapid production of different products.

[0072] The assembly tool for axially fixing through a part described in the present invention can process the mandrel 1 according to the internal dimensions of the part to be assembled, so that multiple parts to be assembled are located on the same axis after passing through the mandrel 1. The present invention has a simple structure and has no strict restrictions on the size and shape of the mandrel 1, and can be inserted into the part. Therefore, the mandrel 1 can be processed according to the internal dimensions of each part so that it can be coaxially matched with the part, and the coaxial assembly between the parts is completed while the parts are axially fixed.

[0073] The embodiments of the present invention disclosed above are only used to help illustrate the present invention. The embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. According to the content of this specification, many modifications and changes can be made. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well.

Claims

1. An assembly tool for axially fixing multiple parts, characterized in that: It comprises a core shaft (1) and a locking nut (2), The rotation limit block (3) is rotatably fixed to the insertion end of the core shaft (1), the center line of the rotation axis is perpendicular to the center line of the core shaft (1), and the length of the rotation limit block (3) is greater than the diameter of the core shaft (1); The locking nut (2) is threadedly connected to the rear end of the core shaft (1).

2. An assembly tool for axially fixing multiple parts according to claim 1, characterized in that: The center line of the rotating shaft is also bisected by the center line of the core shaft (1).

3. An assembly tool for axially fixing multiple parts according to claim 2, characterized in that: The rotation limit block (3) is in the shape of a cuboid, the core shaft (1) is provided with a groove, the rotation limit block (3) is located in the groove, and the rotation limit block (3) does not interfere with the groove when rotating.

4. An assembly method using an assembly tool for axially fixing multiple parts according to any one of claims 1 to 3, characterized in that: Use the following steps: S1, rotating the rotation limit block (3) to a horizontal position; S2, passing the assembly tool through the plurality of parts to be axially fixed; S3, rotating the rotation limit block (3) to a position perpendicular to the center line of the core shaft (1); S4, rotate the locking nut (2) until it fits against the tail part, and continue to rotate the locking nut (2) to drive the mandrel (1) to move from the inside of the part to the outside; S5. The core shaft (1) moves to drive the rotation limit block (3) to fit firmly with the front end part, and the rotation of the locking nut (2) is stopped, thus completing the axial fixation of multiple parts.

5. An assembly tool for axially fixing multiple parts according to claim 1, characterized in that: The core shaft (1) is also provided with a through hole (4) along the axial direction.

6. An assembly tool for axially fixing multiple parts according to claim 1, characterized in that: The diameter of the mandrel (1) is smaller than the diameter of the entrance of the inner cavity of the part to be assembled, the length of the rotation limit block (3) is larger than the diameter of the entrance of the inner cavity of the part, the mandrel (1) is inserted into the inner cavity of the part, and the rotation limit block (3) fits with the inner cavity of the part to fix the part.

7. An assembly tool for axially fixing multiple parts according to claim 6, characterized in that: A hanging seat (5) is also provided at the rear end of the core shaft (1), and the hanging seat (5) is threadedly connected to the core shaft (1).

8. An assembly method using an assembly tool for axially fixing multiple parts according to any one of claims 5 to 7, characterized in that: Use the following steps: S1, rotating the rotation limit block (3) to a horizontal position; S2, inserting the assembly tool into a plurality of parts to be axially positioned, and the mandrel (1) enters the cavity of the leftmost part to be axially positioned; S3, inserting a tool into the through hole (4) to move the rotation limit block (3); S4, rotating the rotation limit block (3) to a position perpendicular to the center line of the core shaft (1); S5, rotate the locking nut (2) until it fits against the tail part, and continue to rotate the locking nut (2) to drive the mandrel (1) to move from the inside of the part to the outside; S6, the core shaft (1) moves to drive the rotation limit block (3) to fit with the tail boss of the leftmost chamber with the fixed parts, and the rotation of the locking nut (2) is stopped, thus completing the axial fixation of multiple parts.

9. An assembly tool for passing through a part for axial fixing according to claim 1, characterized in that: The core shaft (1) is processed according to the internal dimensions of the parts to be assembled so that a plurality of parts to be assembled are located on the same axis after passing through the core shaft (1).

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