A pneumatic rotating coaxiality guide tool for shaft components

Abstract

This utility model discloses a pneumatic rotating coaxiality guiding fixture for shaft components, belonging to the field of shaft assembly technology. It includes a large base plate, with a movable base plate horizontally slidably connected to its top surface. A protective plate is installed on the top surface of the movable base plate, with an opening at its center. Cylinder fixing plates are installed at both ends of the protective plate, and a left clamping component and a right clamping component are located between the cylinder fixing plates. Cylinders are installed on the outer sides of the cylinder fixing plates. The output ends of a pair of cylinders are respectively connected to the left and right clamping components, driving them to move synchronously in opposite directions. Both the left and right clamping components include clamping blocks and polyurethane pads. The clamping blocks have mounting grooves on their sides, and arc-shaped holes on opposite sides of the clamping blocks. The polyurethane pads are installed in the mounting grooves, and arc-shaped grooves are formed on their sides, communicating with the arc-shaped holes, with equal arc lengths and radii.

Description

Technical Field

[0001] This utility model relates to the field of shaft assembly technology, specifically a pneumatic rotating guide tool for shaft components to ensure axial alignment. Background Technology

[0002] Threaded assembly of shaft components is a critical process in mechanical manufacturing, especially in precision assembly scenarios such as aerospace and automotive engines, where the coaxiality accuracy of the assembled components is extremely high. Taking the assembly of the combustion chamber tube and the head as an example, the two must be connected by threaded engagement, and the coaxiality must be controlled within ≤1.5mm to ensure smooth airflow and structural stability. Traditional manual assembly methods rely mainly on operator experience, completing the assembly through manual threading and visual calibration, which has the following significant drawbacks: During manual screwing, it is difficult for operators to accurately control the screwing torque and axial alignment, resulting in radial misalignment of the threads of the combustion chamber tube and the head. When this problem occurs, the assembled shaft needs to be repaired. During the repair process, the glued parts need to be disassembled and cleaned and glued again, which not only wastes time, but may also cause thread wear or damage to the surface paint layer due to repeated disassembly and assembly. Manual operation requires repeated adjustments to the angle and screwing force of components, resulting in long assembly times and difficulty in standardizing batch operations.

[0003] Therefore, there is an urgent need to develop a pneumatic rotating coaxiality guiding tool for shaft components to replace traditional manual operation, achieve precise control of coaxiality during the rotating process, and improve assembly efficiency and quality stability. Utility Model Content

[0004] The purpose of this utility model is to provide a pneumatic rotating and coaxiality guiding tool for shaft components to solve the problems mentioned in the background art.

[0005] In view of the above problems, the technical solution proposed by this utility model is as follows: A pneumatic rotating coaxiality guiding fixture for shaft components includes a large base plate. A movable base plate is horizontally slidably connected to the top surface of the large base plate. A protective plate is installed on the top surface of the movable base plate. An opening is provided at the center of the protective plate. Cylinder fixing plates are installed at both ends of the protective plate. A left clamping component and a right clamping component are provided between the cylinder fixing plates. Cylinders are installed on the outer sides of the cylinder fixing plates. The output ends of a pair of cylinders are respectively connected to the left clamping component and the right clamping component, driving the left clamping component and the right clamping component to move synchronously in opposite directions. Each left clamping component and the right clamping component includes a clamping block and a polyurethane pad. An installation groove is opened on the side of the clamping block. An arc-shaped hole is opened on each opposite side of the clamping block. The polyurethane pad is installed in the installation groove. An arc-shaped groove is opened on the side of the polyurethane pad. The arc-shaped groove and the arc-shaped hole are connected, and the arc length and arc radius are equal. A complete cylindrical through hole can be formed between the holes and the arc grooves. A power mechanism is also installed on the top surface of the large base plate. The power mechanism is used to drive the shaft to be connected to rotate. A bearing support seat is installed on the top of the large base plate between the power mechanism and the movable base plate. A cylindrical roller bearing is installed inside the bearing support seat. A bearing cap is installed on the end face of the bearing support seat. A guide sleeve is embedded in the inner ring of the cylindrical roller bearing. The connected pair of arc holes, the connected pair of arc grooves, the guide sleeve, the output end of the power mechanism, and the opening are set coaxially. The combustion chamber tube is held tightly through the cylindrical through hole formed by the arc hole and the arc groove to ensure that the fixed end does not rotate during screwing. The guide sleeve, the output end of the power mechanism, and the through hole of the clamping block are coaxial. The mechanical structure forces the shaft axis to be consistent during the screwing process. The power mechanism drives the head to rotate, and finally the head and the combustion chamber tube are screwed together.

[0006] Furthermore, the power mechanism includes a screwdriver support mounted on the top surface of the base plate. A pneumatic screwdriver is mounted on the top surface of the screwdriver support, and a screwdriver cap is also mounted on the top surface of the screwdriver support by screws. The output end of the power mechanism is a rotating component, which includes a three-pronged gripper and a screwdriver head. The screwdriver head is the actuating end of the pneumatic screwdriver. The three-pronged gripper is mounted on the screwdriver head of the pneumatic screwdriver and is also located inside the guide sleeve. The pneumatic screwdriver is equipped with a foot switch, which controls the pneumatic screwdriver to provide a stable rotational torque, replacing manual screwing, improving assembly efficiency, and avoiding coaxiality deviation caused by uneven manual torque. The three-pronged gripper clamps the end of the head shaft and cooperates with the guide sleeve to achieve axial positioning, ensuring that the axis is coaxial with the combustion chamber tube during rotation.

[0007] Furthermore, a lower guide rail and an upper guide rail for the clamping block are installed between the pair of cylinder fixing plates. Limiting grooves are provided on both sides of the clamping block. The lower guide rail and the upper guide rail for the clamping block slide within the limiting grooves. The lower guide rail and the upper guide rail for the clamping block cooperate with the limiting grooves to limit the lateral displacement of the clamping block, ensuring that the clamping block moves only in a straight line along the axial direction, improving clamping accuracy, and avoiding deviation of the shaft axis caused by the shaking of the clamping block.

[0008] Furthermore, a positioning block is installed in the middle of the lower guide rail of the clamping block. The clamping block and the positioning block abut against each other. The positioning block limits the maximum movement distance of the clamping block to avoid the clamping block from being damaged by collision due to excessive driving of the cylinder. At the same time, it ensures that the arc-shaped hole and the arc-shaped groove are precisely aligned when the clamping block is closed, forming a complete cylindrical through hole.

[0009] Furthermore, a pair of roller-type linear guide rails is provided between the movable base plate and the large base plate. The roller-type linear guide rail pair includes a guide rail installed on the top surface of the large base plate and a slider installed on the bottom surface of the movable base plate. The slider slides on the guide rail, and the guide rail and the slider form a roller-type linear guide rail pair to ensure the straightness and stability of the movable base plate when it drives the left clamping component and the right clamping component to slide horizontally.

[0010] Furthermore, a pair of tie rods are installed on the side of the movable base plate, and a buffer pad is installed on the outer side of the pair of tie rods. The buffer pad is connected to the movable base. A pair of limiting holes are opened on the side of the bearing support seat. The tie rods slide in the limiting holes. The pair of tie rods and the limiting holes are used to limit the sliding of the movable base plate. The buffer pad is used to ensure that the movable base will not collide with the bearing support seat.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: The pneumatic rotating coaxiality guiding tool for this shaft component clamps the combustion chamber tube through a cylindrical through hole composed of an arc-shaped hole and an arc-shaped groove, ensuring that the fixed end does not rotate during the screwing process; the guide sleeve, the output end of the power mechanism, and the through hole of the clamping block are coaxial, and the mechanical structure forces the shaft axis to be consistent during the screwing process. The power mechanism drives the head to rotate, ultimately causing the head and the combustion chamber tube to screw together. This achieves the goal of replacing traditional manual operation, realizing precise control of coaxiality during the screwing process, and improving assembly efficiency and quality stability. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural schematic diagram of the pneumatic rotation and coaxiality guiding tool for shaft components disclosed in this embodiment of the utility model; Figure 2 This is an exploded structural diagram of the pneumatic rotation and coaxiality guiding tool for shaft components disclosed in this embodiment of the present invention; Figure 3This is a bottom view of the exploded structure of the pneumatic rotation and coaxiality guide tooling for shaft components disclosed in this embodiment of the present utility model; Figure 4 This is a three-dimensional structural diagram of the power mechanism of the pneumatic rotating coaxiality guiding tool for shaft components disclosed in an embodiment of this utility model.

[0013] In the diagram: 1. Main base plate; 2. Roller linear guide pair; 3. Movable base plate; 4. Left clamping component; 5. Positioning block; 6. Right clamping component; 7. Lower guide rail of clamping block; 8. Upper guide rail of clamping block; 9. Cylinder fixing plate; 10. Cylinder; 11. Screwdriver support seat; 12. Rotating component; 13. Pneumatic screwdriver; 14. Screwdriver cover; 15. Guide sleeve; 16. Bearing cover; 17. Bearing support seat; 18. Cylindrical roller bearing; 19. Tie rod; 20. Buffer pad; 21. Protective plate. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figures 1-4This utility model provides a technical solution: a pneumatic rotating coaxiality guiding fixture for shaft components, including a large base plate 1, a movable base plate 3 horizontally slidably connected to the top surface of the large base plate 1, a guard plate 21 installed on the top surface of the movable base plate 3, an opening at the center of the guard plate 21, cylinder fixing plates 9 installed at both ends of the guard plate 21, a left clamping component 4 and a right clamping component 6 provided between the cylinder fixing plates 9, and cylinders 10 installed on the outer sides of the cylinder fixing plates 9, with the output ends of a pair of cylinders 10 respectively connected to the left clamping component 4. The right clamping component 6 is connected and drives the left clamping component 4 and the right clamping component 6 to move synchronously in opposite directions. Both the left clamping component 4 and the right clamping component 6 include clamping blocks and polyurethane pads. The clamping blocks have mounting grooves on their sides, and arc-shaped holes are formed on opposite sides of the clamping blocks. The polyurethane pads are installed in the mounting grooves, and arc-shaped grooves are formed on their sides. The arc-shaped grooves and arc-shaped holes are connected, and their arc lengths and arc radii are equal. The arc-shaped holes and arc-shaped grooves can form a complete cylindrical through-hole. A moving... The power mechanism drives the shaft to rotate. A bearing support 17 is installed on the top of the large base plate 1 between the power mechanism and the movable base plate 3. A cylindrical roller bearing 18 is installed inside the bearing support 17. A bearing cap 16 is installed on the end face of the bearing support 17. A guide sleeve 15 is embedded in the inner ring of the cylindrical roller bearing 18. A pair of connected arc-shaped holes, a pair of connected arc-shaped grooves, the guide sleeve 15, the output end of the power mechanism, and the opening are coaxially arranged. After the cylinder 10 is vented, the piston rod... The clamping block is pushed to move towards each other along the lower guide rail 7 and the upper guide rail 8 of the clamping block. The arc-shaped hole and the arc-shaped groove close to form a cylindrical clamping cavity. The pad block elastically fits the surface of the shaft, thereby fixing the combustion chamber tube. The guide sleeve 15 is installed on the bearing support seat 17 through the cylindrical roller bearing 18 and is coaxial with the output end of the power mechanism. It guides the head shaft to be screwed into the clamping cavity to ensure that the axes of the two are coincident. Finally, the power mechanism drives the head shaft to rotate and connects to the combustion chamber tube through thread screwing. The screwing accuracy is guaranteed by the coaxial structure throughout the process.

[0016] As an embodiment of this utility model, the power mechanism further includes a screwdriver support 11 installed on the top surface of the base plate 1. A pneumatic screwdriver 13 is installed on the top surface of the screwdriver support 11. A screwdriver cover 14 is also installed on the top surface of the screwdriver support 11 by screws. The output end of the power mechanism is a rotating component 12. The rotating component 12 includes a three-grip head and a screwdriver head. The screwdriver head is the actuating end of the pneumatic screwdriver 13. The three-grip head is installed on the screwdriver head of the pneumatic screwdriver 13. The three-grip head is also located inside the guide sleeve 15. The pneumatic screwdriver 13 is equipped with a foot switch. When the operator steps on the foot switch, the pneumatic screwdriver 13 starts and drives the three-grip head to rotate the head shaft. The head shaft moves along the axis of the guide sleeve 15 towards the clamping block and engages with the combustion chamber tube at the fixed end through threads until the specified torque is reached.

[0017] As an embodiment of this utility model, a lower guide rail 7 and an upper guide rail 8 for clamping blocks are installed between a pair of cylinder fixing plates 9. Limiting grooves are provided on both sides of the clamping blocks. The lower guide rail 7 and the upper guide rail 8 for clamping blocks slide in the limiting grooves. When the clamping blocks move, the lower guide rail 7 and the upper guide rail 8 for clamping blocks are embedded in the limiting grooves to form a sliding pair, which forces the clamping blocks to translate along the preset direction of the cylinder fixing plates 9, ensuring that the clamping blocks on both sides move synchronously and in the same direction. After closing, the axis of the clamping cavity is consistent with the axis of the guide sleeve 15.

[0018] As an embodiment of this utility model, a positioning block 5 is further installed in the middle of the lower guide rail 7 of the clamping block. The clamping block and the positioning block 5 abut against each other. When the clamping block moves to contact the positioning block 5, the cylinder 10 controlling the clamping block stops extending. At this time, the arc-shaped hole and the arc-shaped groove are completely closed, and the polyurethane pad is tightly attached to the surface of the shaft, thus completing the clamping and positioning.

[0019] As an embodiment of this utility model, a pair of roller-type linear guide rail pairs 2 are further provided between the movable base plate 3 and the large base plate 1. The roller-type linear guide rail pairs 2 include a guide rail installed on the top surface of the large base plate 1 and a slider installed on the bottom surface of the movable base plate 3. Before assembly, the relative position of the clamping block and the power mechanism is adjusted by pushing the movable base plate 3 to slide along the guide rail to adapt to the assembly requirements of shafts of different lengths. During the screwing process, the guide rail constrains the movement trajectory of the movable base plate 3 to avoid the shaft tilting due to the shaking of the large base plate 1.

[0020] As an embodiment of this utility model, a pair of pull rods 19 are further installed on the side of the movable base plate 3, and a buffer pad 20 is installed on the outer side of the pair of pull rods 19. The buffer pad 20 is connected to the movable base plate 3. A pair of limiting holes are opened on the side of the bearing support seat 17, and the pull rods 19 slide in the limiting holes.

[0021] It should be noted that all standard parts used in this application can be purchased from the market, and can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. The control method is automatic control through a control cabinet. The control circuit can be implemented by simple programming by those skilled in the art and is common knowledge in the field. Furthermore, since this application is mainly used to protect mechanical devices, this application will not explain the control method and circuit connection in detail.

Claims

1. A pneumatic rotating coaxiality guiding tool for shaft components, characterized in that, The system includes a large base plate (1), on which a movable base plate (3) is horizontally slidably connected. A protective plate (21) is installed on the top surface of the movable base plate (3). An opening is provided at the center of the protective plate (21). Cylinder fixing plates (9) are installed at both ends of the protective plate (21). A left clamping component (4) and a right clamping component (6) are provided between the cylinder fixing plates (9). Cylinders (10) are installed on the outer side of the cylinder fixing plates (9). The output ends of a pair of cylinders (10) are respectively connected to the left clamping component (4) and the right clamping component (6), and drive the left clamping component (4) and the right clamping component (6) to move synchronously in opposite directions. The left clamping component (4) and the right clamping component (6) each include a clamping block and a polyurethane pad. An installation groove is provided on the side of the clamping block. Arc-shaped holes are provided on the opposite sides of the clamping block. The polyurethane pad is installed in the mounting groove. The side of the polyurethane pad is provided with an arc groove. The arc groove and the arc hole are connected and the arc length and arc radius are equal. The arc holes and the arc grooves can form a complete cylindrical through hole. The top surface of the large base plate (1) is also equipped with a power mechanism. The power mechanism is used to drive the shaft to be connected to rotate. The top of the large base plate (1) is equipped with a bearing support seat (17) between the power mechanism and the movable base plate (3). The bearing support seat (17) is equipped with a cylindrical roller bearing (18). The end face of the bearing support seat (17) is equipped with a bearing cap (16). The inner ring of the cylindrical roller bearing (18) is embedded with a guide sleeve (15). The connected pair of arc holes, the connected pair of arc grooves, the guide sleeve (15), the output end of the power mechanism, and the opening are coaxially arranged.

2. The pneumatic rotating coaxiality guiding fixture for shaft components according to claim 1, characterized in that, The power mechanism includes a screwdriver support (11) mounted on the top surface of the base plate (1). A pneumatic screwdriver (13) is mounted on the top surface of the screwdriver support (11). A screwdriver cap (14) is also mounted on the top surface of the screwdriver support (11) by screws. The output end of the power mechanism is a rotating component (12). The rotating component (12) includes a three-grip head and a screwdriver head. The screwdriver head is the actuating end of the pneumatic screwdriver (13). The three-grip head is mounted on the screwdriver head of the pneumatic screwdriver (13). The three-grip head is also located inside the guide sleeve (15).

3. The pneumatic rotating coaxiality guiding fixture for shaft components according to claim 1, characterized in that, A clamping block lower guide rail (7) and a clamping block upper guide rail (8) are installed between a pair of cylinder fixing plates (9). Limiting grooves are opened on both sides of the clamping block, and the clamping block lower guide rail (7) and clamping block upper guide rail (8) slide in the limiting grooves.

4. The pneumatic rotating coaxiality guiding fixture for shaft components according to claim 3, characterized in that, A positioning block (5) is installed in the middle of the lower guide rail (7) of the clamping block, and the clamping block and the positioning block (5) abut against each other.

5. The pneumatic rotating coaxiality guiding fixture for shaft components according to claim 1, characterized in that, A pair of roller-type linear guide rail pairs (2) are provided between the movable base plate (3) and the large base plate (1). The roller-type linear guide rail pairs (2) include a guide rail installed on the top surface of the large base plate (1) and a slider installed on the bottom surface of the movable base plate (3). The slider slides on the guide rail.

6. The pneumatic rotating coaxiality guiding fixture for shaft components according to claim 1, characterized in that, A pair of pull rods (19) are installed on the side of the movable base plate (3). A buffer pad (20) is installed on the outside of the pair of pull rods (19), and the buffer pad (20) is connected to the movable base plate (3). A pair of limiting holes are opened on the side of the bearing support seat (17), and the pull rods (19) slide in the limiting holes.

7. The pneumatic rotating coaxiality guiding fixture for shaft components according to claim 2, characterized in that, The pneumatic screwdriver (13) is equipped with a foot switch.

Images