Angle-adjustable pneumatic screwdriver head joint structure
By designing an adjustable-angle pneumatic screwdriver head joint structure, the problems of non-adjustable angle and improper torque control in confined spaces have been solved, enabling multi-angle operation and torque protection, thus improving the tool's adaptability and safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WUXI MAIKE MADINGDING TORQUE ASSEMBLING TOOLS CO LTD
- Filing Date
- 2025-05-19
- Publication Date
- 2026-05-12
AI Technical Summary
Existing pneumatic screwdrivers have angles that are not adjustable or are inconvenient to adjust during use, making them difficult to operate, especially in confined spaces. They also lack effective torque control, which can easily damage the connected parts or screws.
An adjustable-angle pneumatic screwdriver head joint structure was designed. The screwdriver head can be adjusted in multiple angles and controlled in torque by means of an angle adjustment component and a torque limiting component. The micro motor drives the full gear and half gear to mesh and drive the pneumatic motor to deflect. The torque limiting component provides slippage protection after the specified torque is reached.
It enables multi-angle adaptive operation of pneumatic screwdrivers under complex working conditions, and prevents screw damage caused by excessive torque through torque limiting components, thus meeting the precise torque control for different tightening needs.
Smart Images
Figure CN224223764U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of pneumatic screwdriver technology, and in particular to an adjustable-angle pneumatic screwdriver head joint structure. Background Technology
[0002] In existing pneumatic screwdriver technology, the tools often suffer from problems such as non-adjustable or inconvenient angle adjustment during use, especially when working in confined or special working conditions. Traditional pneumatic screwdriver structures are difficult to meet the needs of multi-angle operation. At the same time, the lack of an effective torque control mechanism during the tightening of bolts or screws can easily lead to excessive tightening force, thereby damaging the connected parts or the screws themselves.
[0003] To address this issue, we propose an adjustable-angle pneumatic screwdriver head joint structure. Utility Model Content
[0004] The purpose of this invention is to address the problems existing in the background technology by proposing an adjustable-angle pneumatic screwdriver head joint structure.
[0005] To achieve the above objectives, this utility model provides the following technical solution: an adjustable-angle pneumatic screwdriver head joint structure, including a main body, a pneumatic motor, and an output arm. The main body and the pneumatic motor are connected by an angle adjustment component, which is used to adjust the deflection angle of the output arm relative to the main body.
[0006] The pneumatic motor has a drive shaft at its output end, a screw cylinder on its outer wall, a shaft plate on its output arm, and the shaft plate is rotatably disposed inside the screw cylinder. Two sets of torque limiting components are symmetrically arranged between the shaft plate and the drive shaft. The torque limiting components are used to adjust the output torque of the output arm.
[0007] The screw barrel is threaded with a screw sleeve, which abuts against the pressure head of the torque limiting assembly.
[0008] Preferably, the angle adjustment assembly consists of a fin, a half gear, and a full gear. One end of the fin is symmetrically disposed on the pneumatic motor, and the other end of the fin is rotatably disposed on the main body. The half gear is disposed on the outer wall of the pneumatic motor, and the full gear is rotatably disposed on the main body. The half gear and the full gear are in a gear-tooth meshing state.
[0009] Preferably, the torque limiting assembly consists of a ball seat, a ball head, a ball rod, a spring, a pressure head, and a sleeve. The sleeve is embedded in the shaft plate, the ball rod and the pressure head are slidably disposed in the sleeve, one end of the spring abuts against the ball rod, the other end of the spring abuts against the pressure head, and the ball head is disposed on the ball rod.
[0010] Preferably, the ball seat is embedded in the drive shaft, and the ball head abuts against the ball seat.
[0011] Preferably, the outer wall of the screw barrel is threadedly engaged with the screw sleeve, and the screw sleeve is in sliding contact with the inner wall of the screw barrel.
[0012] Preferably, the output arm has a flange at its end, and the flange has mounting holes spaced at equal intervals.
[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0014] In use, the adjustable-angle pneumatic screwdriver head joint structure of this utility model allows the screwdriver head to be used to be mounted on the output arm via a flange structure. Then, the angle adjustment component works to complete the angle adjustment action of the screwdriver head. When the angle adjustment component works, the built-in micro motor structure of the main body drives the full gear to rotate. Through the meshing action between the full gear and the half gear, the pneumatic motor is driven to deflect on the main body, and the pneumatic motor drives the output arm to deflect.
[0015] Furthermore, when the pneumatic motor is connected to an external air source to drive the output arm to rotate, the working torque of the output arm is controlled by the torque limiting component. When the bolt is tightened to the specified torque, a slippage operation occurs between the output arm and the drive shaft of the pneumatic motor, thereby preventing excessive torque from damaging the screw.
[0016] When the torque limiting component is working, if the specified torque is not reached, the ball joint is driven by the spring force to push the ball head against the ball seat. At this time, the drive shaft drives the shaft plate to rotate through the ball head. When the specified torque is reached or exceeded, the ball head disengages from the ball seat under the action of force. At this time, the ball head slides against the ball joint in the sleeve. At this time, a sliding motion occurs between the shaft plate and the drive shaft, and the drive shaft rotates freely, thereby reducing the transmitted torque. When the transmitted torque is reduced to a suitable range, the ball head resets and re-enters the ball seat under the action of the spring force, and the output arm continues to rotate.
[0017] When a specified torque needs to be adjusted, rotate the sleeve. The threaded engagement between the sleeve and the cylinder pushes the pressure head into the sleeve, changing the spring force. When the pressure head moves away from the spring, the specified torque decreases; when the pressure head moves closer to the spring, the specified torque increases.
[0018] This utility model, by setting an angle adjustment component and using a built-in micro motor to drive the full gear and half gear to mesh and drive the pneumatic motor to deflect, realizes the angle adjustment of the output arm, thereby improving the tool's adaptability in complex working conditions.
[0019] Once the output torque reaches the set value, the torque limiting component is activated. It achieves slippage protection by disengaging the ball head from the ball seat, preventing damage to the screw due to excessive torque. By rotating the threaded sleeve, the preload of the pressure head on the spring is controlled, thereby achieving precise setting of the specified torque to adapt to different fastening requirements. Attached Figure Description
[0020] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0021] Figure 2 This is a three-dimensional structural diagram of the present invention;
[0022] Figure 3 This is a top view of the structure of this utility model;
[0023] Figure 4 This is a schematic diagram of the positional distribution structure of the torsion limiting component of this utility model;
[0024] Figure 5 This is a cross-sectional view of the torsion limiting component of this utility model.
[0025] Figure label:
[0026] 1. Main body; 2. Pneumatic motor; 3. Screw barrel; 4. Screw sleeve; 5. Output arm; 6. Flange; 7. Mounting hole; 8. Torque limiting assembly; 801. Ball seat; 802. Ball head; 803. Ball rod; 804. Spring; 805. Pressure head; 806. Sleeve; 9. Fin plate; 10. Half gear; 11. Full gear; 12. Shaft plate; 13. Drive shaft. Detailed Implementation
[0027] 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.
[0028] Example 1
[0029] like Figures 1-5 As shown, the adjustable-angle pneumatic screwdriver head joint structure proposed in this utility model includes a main body 1, a pneumatic motor 2, and an output arm 5. The end of the output arm 5 is provided with a flange 6, and mounting holes 7 are equally spaced on the flange 6. The screwdriver head to be used can be mounted on the output arm 5 through the flange 6 structure. The main body 1 and the pneumatic motor 2 are connected by an angle adjustment component. The angle adjustment component is used to adjust the deflection angle of the output arm 5 relative to the main body 1. When the angle adjustment component works, it completes the angle adjustment action of the screwdriver head.
[0030] The pneumatic motor 2 has a drive shaft 13 at its output end and a screw barrel 3 on its outer wall. The output arm 5 has a shaft plate 12, which is rotatably mounted inside the screw barrel 3. Two sets of torque limiting components 8 are symmetrically arranged between the shaft plate 12 and the drive shaft 13. The torque limiting components 8 are used to adjust the output torque of the output arm 5. When the pneumatic motor 2 is connected to an external air source to drive the output arm 5 to rotate, the working torque of the output arm 5 is controlled by the torque limiting components 8. When the bolt is tightened to the specified torque, the output arm 5 and the drive shaft 13 of the pneumatic motor 2 will slip, thereby avoiding excessive torque that could damage the screw.
[0031] Example 2
[0032] like Figures 1-5 As shown, the adjustable-angle pneumatic screwdriver head joint structure proposed in this utility model, compared with Embodiment 1, further includes: an angle adjustment component consisting of a fin plate 9, a half gear 10, and a full gear 11. One end of the fin plate 9 is symmetrically disposed on the pneumatic motor 2, and the other end of the fin plate 9 is rotatably disposed on the main body 1. The half gear 10 is disposed on the outer wall of the pneumatic motor 2, and the full gear 11 is rotatably disposed on the main body 1. The half gear 10 and the full gear 11 are in a gear-tooth meshing state. When the angle adjustment component is working, the micro motor structure built into the main body 1 drives the full gear 11 to rotate. Through the gear-tooth meshing action between the full gear 11 and the half gear 10, the pneumatic motor 2 is driven to produce a deflection action on the main body 1, and the pneumatic motor 2 drives the output arm 5 to deflect.
[0033] The torque limiting assembly 8 consists of a ball seat 801, a ball head 802, a ball rod 803, a spring 804, a pressure head 805, and a sleeve 806. The sleeve 806 is embedded in the shaft plate 12. The ball rod 803 and the pressure head 805 are slidably disposed within the sleeve 806. One end of the spring 804 abuts against the ball rod 803, and the other end of the spring 804 abuts against the pressure head 805. The ball head 802 is disposed on the ball rod 803. The ball seat 801 is embedded in the drive shaft 13, and the ball head 802 abuts against the ball seat 801. When the torque limiting assembly 8 is in operation, if the specified torque is not reached, the ball rod 803 is subjected to the force of the spring 804. The elastic force of spring 4 causes the ball head 802 to abut against the ball seat 801. At this time, the drive shaft 13 drives the shaft plate 12 to rotate through the ball head 802. When the specified torque is reached or exceeded, the ball head 802 disengages from the ball seat 801 under the action of the force. At this time, the ball head 802 slides against the ball rod 803 in the sleeve 806. At this time, the shaft plate 12 and the drive shaft 13 slide, and the drive shaft 13 rotates freely, thereby reducing the transmitted torque. When the transmitted torque is reduced to a suitable range, the ball head 802 resets and re-enters the ball seat 801 under the action of the elastic force of spring 804, and the output arm 5 continues to rotate.
[0034] The screw barrel 3 is threaded with a screw sleeve 4. The outer wall of the screw barrel 3 is threadedly engaged with the screw sleeve 4, and the screw sleeve 4 is in sliding contact with the inner wall of the screw barrel 3. The screw sleeve 4 abuts against the pressure head 805 of the torque limiting component 8. When it is necessary to adjust the specified torque, the screw sleeve 4 is rotated. Through the threaded engagement between the screw barrel 3 and the screw sleeve 4, the screw sleeve 4 abuts against the pressure head 805 and enters the sleeve 806 to change the elastic force of the spring 804. When the pressure head 805 moves away from the spring 804, the specified torque decreases. When the pressure head 805 moves closer to the spring 804, the specified torque increases.
[0035] It should be noted that the pneumatic motor 2 and the micro motor structure are existing mature technologies. Their working principle and internal structure are known to those skilled in the art. This utility model only utilizes their functions and does not improve their internal structure. Therefore, it will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience.
[0036] The above specific embodiments are merely several preferred embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.
[0037] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
Claims
1. An adjustable-angle pneumatic screwdriver head joint structure, comprising a main body (1), a pneumatic motor (2), and an output arm (5), characterized in that: The main body (1) and the pneumatic motor (2) are connected by an angle adjustment assembly, which is used to adjust the deflection angle of the output arm (5) relative to the main body (1). The pneumatic motor (2) has a drive shaft (13) at its output end. The pneumatic motor (2) has a screw cylinder (3) on its outer wall. The output arm (5) has a shaft plate (12) on it. The shaft plate (12) is rotatably disposed inside the screw cylinder (3). Two sets of torque limiting components (8) are symmetrically arranged between the shaft plate (12) and the drive shaft (13). The torque limiting components (8) are used to adjust the output torque of the output arm (5). The screw barrel (3) is threaded with a screw sleeve (4), which abuts against the pressure head (805) of the torque limiting assembly (8).
2. The adjustable-angle pneumatic screwdriver head joint structure according to claim 1, characterized in that: The angle adjustment assembly consists of a fin (9), a half gear (10), and a full gear (11). One end of the fin (9) is symmetrically disposed on the pneumatic motor (2), and the other end of the fin (9) is rotatably disposed on the main body (1). The half gear (10) is disposed on the outer wall of the pneumatic motor (2), and the full gear (11) is rotatably disposed on the main body (1). The half gear (10) and the full gear (11) are in a gear meshing state.
3. The adjustable-angle pneumatic screwdriver head joint structure according to claim 1, characterized in that: The torque limiting assembly (8) consists of a ball seat (801), a ball head (802), a ball rod (803), a spring (804), a pressure head (805), and a sleeve (806). The sleeve (806) is embedded in the shaft plate (12). The ball rod (803) and the pressure head (805) are slidably disposed in the sleeve (806). One end of the spring (804) abuts against the ball rod (803), and the other end of the spring (804) abuts against the pressure head (805). The ball head (802) is disposed on the ball rod (803).
4. The adjustable-angle pneumatic screwdriver head joint structure according to claim 3, characterized in that: The ball seat (801) is embedded in the drive shaft (13), and the ball head (802) abuts against the ball seat (801).
5. The adjustable-angle pneumatic screwdriver head joint structure according to claim 1, characterized in that: The outer wall of the screw barrel (3) is threadedly engaged with the screw sleeve (4), and the screw sleeve (4) slides in contact with the inner wall of the screw barrel (3).
6. The adjustable-angle pneumatic screwdriver head joint structure according to claim 1, characterized in that: The output arm (5) has a flange (6) at its end, and mounting holes (7) are provided at equal intervals on the flange (6).