Mechanism for reducing distance between two tightening shafts

Abstract

The utility model relates to the technical field of screw tightening tools, in particular to a mechanism for reducing the distance between two tightening shafts, which comprises a bottom plate and a plurality of tightening mechanisms arranged on the bottom plate, each tightening mechanism comprises a tightening gun main body, a gear transmission pair, an offset transmission shaft, an offset driver, a tightening motor and a tightening shaft, the tightening shaft is rotatably arranged on the bottom plate, and the gear transmission pair is arranged on the bottom plate. The tightening gun body is fixedly connected to the lower end of the tightening shaft, the offset driver is fixed to the bottom plate, an output shaft of the tightening motor is connected with the input end of the offset driver, the output end of the offset driver is connected with the offset transmission shaft, and the offset transmission shaft is in transmission connection with the tightening shaft through a gear transmission pair. According to the mechanism for reducing the distance between the two tightening shafts, gears of different sizes, offset transmission shafts of different specifications and a driver are selected, the mechanism can be matched with simultaneous tightening of a plurality of screws, the requirement for the screws of different distances is met, simultaneous tightening of the screws can be achieved by additionally arranging a mechanical arm, the production efficiency is greatly improved, and the labor intensity is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of screw tightening tools, and particularly relates to a mechanism for reducing the distance between two tightening shafts. Background Art

[0002] Under the background of the rapid development of the current manufacturing industry, improving production efficiency, ensuring product quality, and reducing labor costs have become important goals pursued by enterprises. Especially in the field of fastener assembly, such as the screw tightening operation of components like valve block bars, the traditional manual tightening method has gradually been unable to meet the needs of modern industrial production due to its disadvantages such as low efficiency, unstable quality, and high labor intensity.

[0003] Specifically, there are many limitations in the traditional method of manually holding a screwdriver to tighten screws. On the one hand, it is difficult to ensure that the tightening torque of each screw is exactly the same manually, which not only affects the overall sealing performance and quality stability of the product, but may also lead to a decline or damage in product performance due to insufficient or excessive tightening. On the other hand, manual tightening requires a large amount of manpower and time. Especially in the face of large-scale production, this inefficient tightening method will significantly increase production costs and cycle times.

[0004] In order to overcome the above problems, there is an urgent need for an automated solution that can tighten multiple screws simultaneously, improve production efficiency, and ensure tightening quality. Summary of the Utility Model

[0005] In order to solve the above problems, the utility model provides a mechanism for reducing the distance between two tightening shafts. By selecting gears of different sizes, offset drive shafts and drivers of different specifications, this mechanism for reducing the distance between two tightening shafts can adapt to the simultaneous tightening of multiple screws and meet screws with different spacings. With the addition of a robotic arm, it can achieve the simultaneous tightening of multiple screws, greatly improving production efficiency and reducing the labor intensity of manpower.

[0006] The technical solution of the utility model is as follows:

[0007] A mechanism for reducing the distance between two tightening shafts includes a base plate and a number of sets of tightening mechanisms installed on the base plate. Each tightening mechanism includes a tightening gun body, a gear transmission pair, an offset drive shaft, an offset driver, a tightening motor, and a tightening shaft. The tightening shaft is rotatably installed on the base plate, the tightening gun body is fixedly connected to the lower end of the tightening shaft, the offset driver is fixed on the base plate, the output shaft of the tightening motor is connected to the input end of the offset driver, the output end of the offset driver is connected to the offset drive shaft, and the offset drive shaft is in transmission connection with the tightening shaft through the gear transmission pair.

[0008] There are two sets of tightening mechanisms.

[0009] The tightening gun body is fixedly connected to the tightening shaft through a connecting piece.

[0010] The gear transmission pair includes a planetary gear and a transmission gear. The planetary gear is fixedly connected to the tightening shaft, and the transmission gear is fixedly connected to the offset transmission shaft.

[0011] The gear transmission pair includes combinations of planetary gears and transmission gears of various interchangeable sizes.

[0012] The beneficial effects of the present utility model are as follows:

[0013] 1. A mechanism for reducing the distance between two tightening shafts disclosed by the present utility model can tighten two screws simultaneously, improve production efficiency, enhance the quality standard after tightening, and reduce the labor intensity of workers.

[0014] 2. A mechanism for reducing the distance between two tightening shafts disclosed by the present utility model can adapt to the tightening of most screw pitches on the market by selecting different sizes of gears and different types of offset drivers.

[0015] 3. A mechanism for reducing the distance between two tightening shafts disclosed by the present utility model can be externally added with a robotic arm to achieve the function of automatically tightening screws.

[0016] 4. A mechanism for reducing the distance between two tightening shafts disclosed by the present utility model can achieve simultaneous tightening of multiple tightening shafts, and greatly improve production efficiency while ensuring the tightening quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] By reading the detailed description of the preferred embodiments below, the solutions and advantages of the present application will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present utility model.

[0018] In the drawings:

[0019] Figure 1 is a three-dimensional structural schematic diagram of a mechanism for reducing the distance between two tightening shafts according to an embodiment of the present utility model;

[0020] Figure 2 is a front view of a mechanism for reducing the distance between two tightening shafts according to an embodiment of the present utility model;

[0021] The components represented by the reference numerals in the drawings are:

[0022] For the present utility model: 1. Tightening gun main body, 2. Connecting piece, 3. Planetary gear, 4. Transmission gear, 5. Offset transmission shaft, 6. Offset driver, 7. Tightening motor, 8. Tightening shaft, 9. Base plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] AsFigure 1 and Figure 2 As shown in Figure 2 , the mechanism for reducing the distance between two tightening shafts mainly includes a bottom plate 9 and two sets of tightening mechanisms mounted on the bottom plate 9.

[0024] Each set of tightening mechanism includes a tightening gun body 1, a connecting piece 2, a planetary gear 3, a transmission gear 4, an offset transmission shaft 5, an offset driver 6, and a tightening motor 7.

[0025] Tightening gun body 1: Used to actually perform the screw tightening operation, and is fixedly connected to the lower end of the tightening shaft 8 through the connecting piece 2.

[0026] Connecting piece 2: Used to firmly fix the tightening gun body 1 on the tightening shaft 8 to ensure stability and accuracy during the tightening process;

[0027] The connecting piece 2 is made of high-strength material, has sufficient rigidity and toughness, and can withstand large torques and axial forces during the tightening process to ensure a firm connection between the tightening gun body 1 and the tightening shaft 8.

[0028] The design and machining accuracy requirements of the connecting piece 2 are extremely high to ensure the coaxiality and perpendicularity between the tightening gun body 1 and the tightening shaft 8, thereby improving the accuracy and reliability of tightening.

[0029] In order to facilitate the maintenance and replacement of the tightening gun body 1 or other components, the connecting piece 2 usually adopts a detachable structure, such as threaded connection, pin connection, etc., which is convenient for quick disassembly and assembly.

[0030] The connecting piece 2, as a bridge between the tightening gun body 1 and the tightening shaft 8, is responsible for transmitting the power generated by the tightening motor 7 to the tightening gun body 1 through the tightening shaft 8 to drive it to rotate and tighten the screw.

[0031] During the tightening process, the connecting piece 2 needs to withstand the vibration and impact from the tightening gun body 1, and through its stable connection function, ensure that the tightening gun body 1 can still maintain a stable posture and position during high-speed rotation.

[0032] When it is necessary to adjust the distance between the tightening shafts 8 to adapt to screws with different distances, the connecting piece 2 needs to be able to cooperate flexibly with the offset driver 6 and the offset transmission shaft 5 to ensure that the tightening gun body 1 can accurately align with the screw and perform the tightening operation.

[0033] Planetary gear 3: Fixedly connected to the tightening shaft 8 and is part of the gear transmission pair.

[0034] Transmission gear 4: Fixedly connected to the offset transmission shaft 5, meshes with the planetary gear 3, and drives the planetary gear 3 and the tightening shaft 8 to rotate by rotation.

[0035] Offset transmission shaft 5: Connects to the output end of the offset driver 6.

[0036] Offset driver 6: Fixed on the bottom plate 9, it provides power for the offset transmission shaft 5. As the name implies, an offset driver is a type of driver that can generate offset motion. It is usually used in conjunction with components such as transmission shafts and gears. By adjusting the displacement of its output end, it can achieve the lateral or longitudinal movement of the transmission shaft or related components, thereby changing the position or posture of the working components (such as the tightening shaft, fixture, etc.). In industrial automation equipment, offset drivers are commonly used to adjust the spacing, angle, or position of working components to adapt to working objects of different specifications or positions.

[0037] In this embodiment, the offset driver 6 adopts an adjustable driver, which can accurately control the offset amount according to preset parameters or external signals to ensure that the tightening shaft 8 can accurately align with screws of different spacings.

[0038] Tightening motor 7: As the main power source of the tightening mechanism, its output shaft is connected to the input end of the offset driver 6, providing the necessary torque and rotational speed for the entire tightening process.

[0039] Tightening shaft 8: Rotatably mounted on the bottom plate 9 through bearings and connected to the offset transmission shaft 5 through a gear transmission pair to achieve power transmission and the rotation of the tightening gun body 1.

[0040] To further improve production efficiency and the level of intelligence, the two-tightening-shaft spacing reduction mechanism in this embodiment also supports subsequent automation upgrades. For example, it can be paired with a robotic arm for automatic tightening operations. Through the precise control and movement capabilities of the robotic arm, automatic positioning, grasping, and tightening of screws can be achieved. At the same time, integrated software and cloud-based interconnection functions can be added to achieve a large amount of storage and efficient interconnection of tightening product data, providing strong support for production management and quality control.

Claims

1. A mechanism for reducing the distance between two tightening axes, characterized in that: The invention comprises a base plate (9) and a plurality of tightening mechanisms mounted on the base plate (9). The tightening mechanisms comprise a tightening gun body (1), a gear transmission pair, an offset transmission shaft (5), an offset driver (6), a tightening motor (7) and a tightening shaft (8). The tightening shaft (8) is rotatably mounted on the base plate (9). The tightening gun body (1) is fixedly connected to the lower end of the tightening shaft (8). The offset driver (6) is fixed to the base plate (9). The output shaft of the tightening motor (7) is connected to the input end of the offset driver (6). The output end of the offset driver (6) is connected to the offset transmission shaft (5). The offset transmission shaft (5) is transmission-connected to the tightening shaft (8) via the gear transmission pair.

2. A mechanism for reducing the distance between two tightening shafts according to claim 1, characterized in that: The tightening mechanism is provided in two sets.

3. A mechanism for reducing the distance between two tightening shafts according to claim 1, characterized in that: The tightening gun body (1) is fixedly connected to the tightening shaft (8) via a connecting piece (2).

4. The mechanism for reducing the distance between two tightening shafts according to claim 1, characterized in that: The gear transmission pair comprises a planetary gear (3) and a transmission gear (4); the planetary gear (3) is fixedly connected to a tightening shaft (8), and the transmission gear (4) is fixedly connected to an offset transmission shaft (5).

5. A mechanism for reducing the distance between two tightening shafts according to claim 4, characterized in that: The gear transmission pair comprises a combination of interchangeable planetary gears (3) and transmission gears (4) of various sizes.

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