Screw screwing tool

Abstract

The invention provides a screw screwing tool. The screw screwing tool comprises a base plate; the first screwing drum is rotatably arranged on the base plate, and the first screwing drum is provided with a first matching part matched with the first screw so as to drive the first screw to rotate; the second screwing drum is rotatably arranged on the base plate, and the second screwing drum is provided with a second matching part matched with the second screw so as to drive the second screw to rotate; the driving rotary drum is rotatably arranged on the base plate; the transmission belt is arranged on the peripheries of the first screwing rotary drum, the second screwing rotary drum and the driving rotary drum in a sleeving mode so that the driving rotary drum can drive the first screwing rotary drum and the second screwing rotary drum to rotate when rotating; and the sliding structure is arranged between the base plate and the driving rotary drum, so that the driving rotary drum can move relative to the base plate to tension the transmission belt. According to the technical scheme, the problem that in the related technology, it is difficult to tighten a screw in a manual screwing mode can be effectively solved.

Description

Technical Field

[0001] The present invention relates to the technical field of auxiliary tools, and in particular to a screw-tightening tool. Background Art

[0002] For electrical equipment that needs to be sealed, such as the box body and box cover of a manual grounding switch, a small rotating screw is generally provided, and the sealing member is compressed by the tightening force of the screw to achieve sealing.

[0003] However, during the tightening operation, workers often have difficulty tightening the screws due to insufficient strength, resulting in poor sealing effect. This problem is particularly prominent in humid and rainy areas such as Guangdong. Manual grounding switches are easily infiltrated with water and moisture, causing safety hazards such as cross-current and poor insulation, and damaging components.

[0004] In addition, there are more than one screws that need to be tightened on a manual grounding switch, and the staff needs to tighten multiple screws in sequence, which makes the labor intensity high. Summary of the invention

[0005] The main purpose of the present invention is to provide a screw-tightening tool to solve the problem in the related art that it is difficult to tighten the screw by manual screwing.

[0006] In order to achieve the above-mentioned objectives, the present invention provides a screw-tightening tool, comprising: a base plate; a first screwing cylinder rotatably arranged on the base plate, the first screwing cylinder having a first matching portion matching with the first screw to drive the first screw to rotate; a second screwing cylinder rotatably arranged on the base plate, the second screwing cylinder having a second matching portion matching with the second screw to drive the second screw to rotate; a driving cylinder rotatably arranged on the base plate; a transmission belt, sleeved on the outer circumference of the first screwing cylinder, the second screwing cylinder and the driving cylinder so that the first screwing cylinder and the second screwing cylinder are driven to rotate when the driving cylinder rotates; a sliding structure, arranged between the base plate and the driving cylinder, so that the driving cylinder can move relative to the base plate and thereby tension the transmission belt.

[0007] Furthermore, the sliding structure includes a first sliding groove arranged on the base plate and a sliding block arranged on the driving drum, and the sliding block is slidably arranged in the first sliding groove.

[0008] Further, the driving drum is located below the first twisting drum and the second twisting drum, the first slide groove extends in the vertical direction, the driving drum has a counterweight block, and the driving drum tensions the transmission belt through the weight of the counterweight block.

[0009] Furthermore, the sliding structure also includes a first limit block and a second limit block arranged on the sliding block, the first limit block and the second limit block are respectively arranged on both sides of the base plate and both cooperate with the base plate stopper to limit the separation of the driving drum from the base plate.

[0010] Furthermore, the slider includes a mounting block and a connecting shaft, the driving cylinder is rotatably mounted on the mounting block, the connecting shaft is arranged on a side of the mounting block away from the driving cylinder and is inserted into the first slide groove, the mounting block cooperates with the first side stopper of the substrate, and the sliding structure also includes a locking piece rotatably arranged on the connecting shaft and located on the second side of the substrate, the locking piece has a locking position and an unlocking position, and a flexible abutment piece is arranged on the side of the locking piece facing the substrate, when the locking piece is in the unlocking position, the flexible abutment piece is arranged opposite to the first slide groove, and when the locking piece is in the locking position, the flexible abutment piece abuts and cooperates with the second side of the substrate to lock the connecting shaft in the first slide groove.

[0011] Furthermore, the flexible abutment member has a guiding inclined surface.

[0012] Furthermore, a second slide groove is provided on the base plate, and the first rotating drum can be slidably disposed in the second slide groove to move away from or close to the second rotating drum.

[0013] Furthermore, the screw tightening tool also includes a slide plate, a guide groove is provided on the slide plate, a guide block is provided on the base plate, the guide block is inserted into the guide groove, when the first screwing cylinder slides along the second slide groove, the slide plate moves synchronously with the first screwing cylinder and cooperates with the guide of the guide block.

[0014] Furthermore, the first rotating cylinder includes an inner cylinder and an outer cylinder. The inner cylinder is inserted into the outer cylinder. The outer cylinder is provided with an engaging portion adapted to the transmission belt. The outer cylinder can rotate with the transmission belt. The first matching portion is provided on the inner cylinder. An elastic coupling member is provided between the inner cylinder and the outer cylinder. The outer cylinder applies a coupling force to the inner cylinder through the elastic coupling member. The elastic coupling member has a coupling state and a slipping state. When the elastic coupling member is deformed, it switches from the coupling state to the slipping state. When the elastic coupling member is in the coupling state, the outer cylinder drives the inner cylinder to rotate through the elastic coupling member. When the elastic coupling member is in the slipping state, the outer cylinder can rotate and the inner cylinder remains stationary.

[0015] Furthermore, a snap-fit ​​groove is provided on the outer surface of the inner cylinder, and the elastic coupling member includes a first connecting arm, a second connecting arm and a snap-fit ​​protrusion provided between the first connecting arm and the second connecting arm. The first connecting arm and the second connecting arm are connected to the inner surface of the outer cylinder, and the snap-fit ​​protrusion is snap-fitted in the snap-fit ​​groove.

[0016] By applying the technical solution of the present invention, the screw-tightening tool includes a first screwing drum that cooperates with the first screw to drive the first screw to rotate, and a second screwing drum that cooperates with the second screw to drive the second screw to rotate. The screw-tightening tool also includes a driving drum and a transmission belt. The transmission belt is sleeved on the outer circumference of the driving drum, the first screwing drum and the second screwing drum, so that when the staff drives the driving drum to rotate, the transmission belt drives the first screwing drum and the second screwing drum to rotate together, thereby driving the first screw and the second screw to rotate. That is, the staff only needs to drive the driving drum to rotate to achieve synchronous tightening of the first screw and the second screw. Compared with manually tightening the first screw and the second screw in sequence, the use of the screw-tightening tool of the present application greatly simplifies the operation of the staff and makes it easier to tighten the first screw and the second screw. In addition, the screw-tightening tool also includes a sliding structure, and the driving drum can slide relative to the base plate to tighten the transmission belt, that is, to ensure that the driving drum, the first twisting drum and the second twisting drum can all maintain stable cooperation with the transmission belt, and then the driving force of the driving drum can be transmitted to the transmission belt and the transmission belt can drive the first twisting drum and the second twisting drum to rotate, ensuring the reliability of the transmission, that is, ensuring the effect of twisting the first screw and the second screw. Therefore, the technical solution of the present application can effectively solve the problem of tightening screws by manual twisting in the related art. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of the present application 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 drawings:

[0018] Figure 1 A schematic diagram of the three-dimensional structure of a first embodiment of a screw-driving tool according to the present invention is shown;

[0019] Figure 2 Shows Figure 1 An enlarged view of the screw-driving tool at point A;

[0020] Figure 3 Shows Figure 1 A three-dimensional structural diagram of a partial structure of a screw-tightening tool;

[0021] Figure 4 Shows Figure 3 An enlarged view of point B of the screw-tightening tool;

[0022] Figure 5 Shows Figure 1 A schematic cross-sectional view of a partial structure of a screw-tightening tool;

[0023] Figure 6 Shows Figure 1A schematic diagram of the exploded structure of a first screw-twisting drum of a screw-twisting tool;

[0024] Figure 7 A schematic cross-sectional view of a driving drum of a second embodiment of a screw-driving tool according to the present invention is shown;

[0025] Figure 8 Shows Figure 7 A front view of a locking member of a screw-driving tool;

[0026] Fig. 9 Shows Figure 8 A schematic cross-sectional view of the locking member along the AA line.

[0027] The above drawings include the following reference numerals:

[0028] 10. Base plate; 11. First side surface; 12. Second side surface; 13. Second slide groove; 14. Guide block;

[0029] 20. First rotating cylinder; 21. First matching portion; 22. Inner cylinder; 221. Clamping groove; 23. Outer cylinder; 231. Engaging portion; 24. Elastic coupling member; 241. First connecting arm; 242. Second connecting arm; 243. Clamping protrusion;

[0030] 30. Second rotating drum; 31. Second matching portion;

[0031] 40. Driving the drum;

[0032] 50. Transmission belt;

[0033] 60. Sliding structure; 61. First slide groove; 62. Sliding block; 621. Mounting block; 622. Connecting shaft; 63. First limiting block; 64. Second limiting block; 65. Locking member; 651. Flexible abutting member; 652. Guide slope;

[0034] 70. Slide plate; 71. Guide groove. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0037] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0038] like Figure 1 and Figure 5 As shown, the present application provides a screw-tightening tool. The first embodiment of the screw-tightening tool of the present application includes: a base plate 10 , a first screwing drum 20 , a second screwing drum 30 , a driving drum 40 , a transmission belt 50 and a sliding structure 60 . Among them, the first rotating drum 20 is rotatably arranged on the base plate 10, and the first rotating drum 20 has a first matching portion 21 that matches with the first screw to drive the first screw to rotate; the second rotating drum 30 is rotatably arranged on the base plate 10, and the second rotating drum 30 has a second matching portion 31 that matches with the second screw to drive the second screw to rotate; the driving drum 40 is rotatably arranged on the base plate 10; the transmission belt 50 is sleeved on the outer periphery of the first rotating drum 20, the second rotating drum 30 and the driving drum 40 so that when the driving drum 40 rotates, it drives the first rotating drum 20 and the second rotating drum 30 to rotate; the sliding structure 60 is arranged between the base plate 10 and the driving drum 40, so that the driving drum 40 can move relative to the base plate 10 and thereby tension the transmission belt 50.

[0039] By applying the technical solution of this embodiment, the screw-tightening tool includes a first screwing drum 20 that cooperates with the first screw to drive the first screw to rotate, and a second screwing drum 30 that cooperates with the second screw to drive the second screw to rotate. The screw-tightening tool also includes a driving drum 40 and a transmission belt 50. The transmission belt 50 is sleeved on the outer circumference of the driving drum 40, the first screwing drum 20 and the second screwing drum 30, so that when the staff drives the driving drum 40 to rotate, the transmission belt 50 drives the first screwing drum 20 and the second screwing drum 30 to rotate together, thereby driving the first screw and the second screw to rotate. That is, the staff only needs to drive the driving drum 40 to rotate to achieve synchronous tightening of the first screw and the second screw. Compared with manually tightening the first screw and the second screw in sequence, the use of the screw-tightening tool of this embodiment greatly simplifies the operation of the staff and makes it easier to tighten the first screw and the second screw. In addition, the screw-tightening tool also includes a sliding structure 60, and the driving drum 40 can slide relative to the base plate 10 to tighten the transmission belt 50, that is, to ensure that the driving drum 40, the first screwing drum 20 and the second screwing drum 30 can all maintain stable cooperation with the transmission belt 50, and then the driving force of the driving drum 40 can be transmitted to the transmission belt 50 and the transmission belt 50 can drive the first screwing drum 20 and the second screwing drum 30 to rotate, ensuring the reliability of the transmission, that is, ensuring the effect of screwing the first screw and the second screw. Therefore, the technical solution of this embodiment can effectively solve the problem of tightening screws by manual screwing in the related art.

[0040] It should be noted that the above-mentioned “the staff drives the driving drum 40 to rotate” can be electrically driven or manually driven. In this embodiment, the staff drives the driving drum 40 to rotate by manually driving. Specifically, Figure 1 The driving drum 40 has a screwing handle with anti-friction patterns. The screwing handle is much larger than the first screw or the second screw, making it more convenient for the operator to hold and drive the screwing handle to rotate, thereby making it easier to perform tightening operations.

[0041] like Figure 1As shown, the lower end of the substrate 10 has a handle, and the staff can achieve the docking between the first screw and the first screwing drum 20 and the docking between the second screw and the second screwing drum 30 by holding the handle, while ensuring the stability of the entire screw tightening tool during the process of driving the driving drum 40. The screw tightening tool of this embodiment has the advantages of simple structure, convenient operation, and easy use. After completing the inspection and maintenance of the manual grounding knife switch, the staff can use the screw tightening tool of this embodiment to tighten and rotate the first screw and the second screw more laboriously, make up for the problem of insufficient strength, and thus reduce the water ingress and moisture, component damage, etc. caused by poor sealing, thereby reducing operation and maintenance costs and ensuring safe and stable operation of the equipment.

[0042] like Figure 3 and Figure 4 As shown, the specific structure of the first matching portion 21 and the specific structure of the second matching portion 31 match the structure of the outer ends of the first screw and the second screw, as long as they can drive the first screw and the second screw to rotate.

[0043] like Figure 1 and Figure 5 As shown, the sliding structure 60 includes a first slide groove 61 provided on the base plate 10 and a slider 62 provided on the driving drum 40, and the slider 62 is slidably provided in the first slide groove 61. The driving drum 40 is movably provided on the base plate 10 through the cooperation of the slider 62 and the first slide groove 61, which has the advantage of simple structure.

[0044] like Figure 1 and Figure 5 As shown, the driving drum 40 is located below the first twisting drum 20 and the second twisting drum 30, the first slide groove 61 extends in the vertical direction, and the driving drum 40 has a counterweight block, and the driving drum 40 tensions the transmission belt 50 through the weight of the counterweight block. When the transmission belt 50 and the first twisting drum 20 and the second twisting drum 30 are loose or slipping, the driving drum 40 will move downward under the gravity of the counterweight block to tension the transmission belt 50, thereby ensuring that the transmission belt 50 and the driving drum 40, the first twisting drum 20 and the second twisting drum 30 can all maintain a stable driving matching state.

[0045] like Figure 5 As shown, the sliding structure 60 further includes a first limit block 63 and a second limit block 64 disposed on the slider 62, the first limit block 63 and the second limit block 64 are respectively disposed on both sides of the base plate 10 and both cooperate with the base plate 10 stopper to limit the separation of the driving drum 40 from the base plate 10. The first limit block 63 and the second limit block 64 are disposed so that the driving drum 40 can only rotate relative to the base plate 10 and move along the first slide groove 61, but cannot perform other movements, thereby ensuring the connection stability between the driving drum 40 and the base plate 10.

[0046] like Figures 2 to 4 As shown, a second slide groove 13 is provided on the base plate 10, and the first screwing cylinder 20 is slidably provided in the second slide groove 13 to move away from or approach the second screwing cylinder 30. The first screwing cylinder 20 is movably provided along the second slide groove 13, so that the distance between the first screwing cylinder 20 and the second screwing cylinder 30 can be adjusted to adapt to various scenarios with different spacings between the first screw and the second screw, thereby improving the versatility of the screw driving tool of this embodiment.

[0047] like Figure 3 and Figure 4 As shown, the screw-tightening tool further includes a slide plate 70, on which a guide groove 71 is provided, and a guide block 14 is provided on the base plate 10, and the guide block 14 is inserted into the guide groove 71. When the first screw-twisting cylinder 20 slides along the second slide groove 13, the slide plate 70 moves synchronously with the first screw-twisting cylinder 20 and cooperates with the guide block 14. The first screw-twisting cylinder 20 is inserted into the slide plate 70, and the guide groove 71 is arranged parallel to the second slide groove 13. The double guidance and limiting are realized by the sliding cooperation between the guide block 14 and the guide groove 71 and the sliding cooperation between the second slide groove 13 and the first screw-twisting cylinder 20, thereby ensuring the stability of the first screw-twisting cylinder 20 moving along the second slide groove 13.

[0048] like Figure 6As shown, the first rotating cylinder 20 includes an inner cylinder 22 and an outer cylinder 23. The inner cylinder 22 is inserted into the outer cylinder 23. The outer cylinder 23 is provided with an engaging portion 231 adapted to the transmission belt 50. The outer cylinder 23 can rotate with the transmission belt 50. The first matching portion 21 is provided on the inner cylinder 22. An elastic coupling member 24 is provided between the inner cylinder 22 and the outer cylinder 23. The outer cylinder 23 applies a coupling force to the inner cylinder 22 through the elastic coupling member 24. The elastic coupling member 24 has a coupling state and a slipping state. When the elastic coupling member 24 is deformed, it switches from the coupling state to the slipping state. When the elastic coupling member 24 is in the coupling state, the outer cylinder 23 drives the inner cylinder 22 to rotate through the elastic coupling member 24. When the elastic coupling member 24 is in the slipping state, the outer cylinder 23 can rotate and the inner cylinder 22 remains stationary. Among them, the first matching portion 21 is arranged on the inner cylinder 22, that is, when the inner cylinder 22 rotates, it drives the first screw to rotate and thus tightens the first screw; the meshing portion 231 adapted to the transmission belt 50 is arranged on the outer cylinder 23, that is, the driving drum 40 drives the outer cylinder 23 to rotate through the transmission belt 50; an elastic coupling member 24 is arranged between the inner cylinder 22 and the outer cylinder 23, and when the elastic coupling member 24 is in a coupled state, the outer cylinder 23 applies a coupling force to the inner cylinder 22 through the elastic coupling member 24 so that the inner cylinder 22 can rotate synchronously with the outer cylinder 23 and thus drive the first screw to rotate, and when the elastic coupling member 24 is in a slipping state, the outer cylinder 23 cannot drive the inner cylinder 22 to rotate and the inner cylinder 22 remains stationary. Since the initial tightening degrees of the first screw and the second screw are different, there will be a difference in the number of tightening turns required to tighten the two, that is, there may be a situation where one of the screws has been tightened but the other has not been tightened, for example, the first screw has been tightened but the second screw has not been tightened. By providing an elastic coupling member 24 that can make the inner cylinder 22 and the outer cylinder 23 slip, the outer cylinder 23 can continue to rotate while the inner cylinder 22 remains stationary, that is, the first screw remains in a tightened state and no longer rotates, while the transmission belt 50 continues to drive the outer cylinder 23 and the second rotating cylinder 30 to rotate to continue tightening the second screw.

[0049] like Figure 6As shown, a clamping groove 221 is provided on the outer surface of the inner cylinder 22, and the elastic coupling member 24 includes a first connecting arm 241, a second connecting arm 242, and a clamping protrusion 243 provided between the first connecting arm 241 and the second connecting arm 242. The first connecting arm 241 and the second connecting arm 242 are connected to the inner surface of the outer cylinder 23, and the clamping protrusion 243 is clamped in the clamping groove 221. The first connecting arm 241 and the second connecting arm 242 are both arranged at an angle relative to the inner surface of the outer cylinder 23, and the clamping protrusion 243 is connected between the first connecting arm 241 and the second connecting arm 242 and protrudes inward. When the first screw has not been tightened, the locking protrusion 243 is inserted into the locking groove 221, so that the inner cylinder 22 can rotate synchronously with the outer cylinder 23, and then continue to tighten the first screw; when the first screw has been tightened, the inner cylinder 22 is difficult to rotate further, and the outer cylinder 23 continues to rotate driven by the transmission belt 50. At this time, the locking protrusion 243 is pushed against by the side wall of the locking groove 221 and moves toward the inner surface of the outer cylinder 23 and then disengages from the locking groove 221, causing the outer cylinder 23 and the inner cylinder 22 to slip.

[0050] like Figure 1 and Figure 3 As shown, the second rotating drum 30 can also be movably arranged on the substrate 10. The specific structure for realizing the movement of the second rotating drum 30 relative to the substrate 10 is similar to the specific structure for realizing the movement of the first rotating drum 20 relative to the substrate 10. The structures of the second rotating drum 30 and the first rotating drum 20 are similar and will not be repeated here.

[0051] In this embodiment, the base plate 10 is a T-shaped structure, and the first screwing drum 20 and the second screwing drum 30 are respectively arranged on both sides of the base plate 10 to adapt to the positions of the first screw and the second screw. The transmission belt 50 cooperates with the driving drum 40, the first screwing drum 20 and the second screwing drum 30 through transmission teeth.

[0052] Figures 7 to 9 A structural diagram of a second embodiment of a screw tightening tool according to the present application is shown. The second embodiment differs from the first embodiment in that the structural details of the sliding structure 60 are different. The following mainly describes the parts of the second embodiment that are different from the first embodiment in conjunction with the drawings, and the same parts of the two embodiments are not repeated.

[0053] like Figure 7 and Figure 8As shown, the slider 62 includes a mounting block 621 and a connecting shaft 622. The driving drum 40 is rotatably mounted on the mounting block 621. The connecting shaft 622 is arranged on a side of the mounting block 621 away from the driving drum 40 and is inserted into the first slide groove 61. The mounting block 621 cooperates with the first side surface 11 of the substrate 10 to stop. The sliding structure 60 also includes a locking member 65 rotatably arranged on the connecting shaft 622 and located on the second side surface 12 of the substrate 10. The locking member 65 has a locking position and an unlocking position. A flexible abutment 651 is arranged on the side of the locking member 65 facing the substrate 10. When the locking member 65 is in the unlocking position, the flexible abutment 651 is arranged opposite to the first slide groove 61. When the locking member 65 is in the locking position, the flexible abutment 651 abuts and cooperates with the second side surface 12 of the substrate 10 to lock the connecting shaft 622 in the first slide groove 61. The mounting block 621 and the locking member 65 are respectively arranged on both sides of the base plate 10 and cooperate with the base plate 10 stopper, thereby ensuring that the driving drum 40 will not be separated from the base plate. The locking member 65 is rotatably arranged on the connecting shaft 622. When it is necessary to adjust the position of the driving drum 40 on the base plate 10, the locking member 65 is located in the unlocking position, so that the flexible abutting member 651 is arranged opposite to the first slide groove 61. At this time, there is a certain gap between the surface of the locking member 65 and the second side surface 12 of the base plate 10, so that the connecting shaft 622 can slide in the first slide groove 61 to adjust the position of the driving drum 40; when the position of the driving drum 40 is determined, the locking member 65 is rotated to make the locking member 65 located in the locking position, so that the flexible abutting member 651 abuts against the second side surface 12 of the base plate 10 and is interference-fitted to fill the gap between the locking member 65 and the second side surface 12, so that the connecting shaft 622 is locked in the first slide groove 61, that is, the position of the driving drum 40 is locked.

[0054] like Figure 8 and Fig. 9 As shown, the flexible abutment member 651 has a guide slope 652. When the locking member 65 is rotated so that the locking member 65 switches from the unlocking position to the locking position, Fig. 9 The lower end of the guiding inclined surface 652 first contacts the second side surface 12 , so as to facilitate the flexible abutting member 651 to move to a position where it abuts against the second side surface 12 .

[0055] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0056] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0057] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A screw-tightening tool, characterized in that: include: base(10); A first screwing drum (20) is rotatably disposed on the base plate (10), wherein the first screwing drum (20) has a first matching portion (21) matched with the first screw to drive the first screw to rotate; A second screwing drum (30) is rotatably disposed on the base plate (10), wherein the second screwing drum (30) has a second matching portion (31) matched with the second screw to drive the second screw to rotate; A driving drum (40) rotatably disposed on the base plate (10); A transmission belt (50) is sleeved on the outer circumferences of the first twisting drum (20), the second twisting drum (30) and the driving drum (40) so that when the driving drum (40) rotates, the first twisting drum (20) and the second twisting drum (30) are driven to rotate; A sliding structure (60) is arranged between the base plate (10) and the driving drum (40) so as to enable the driving drum (40) to move relative to the base plate (10) and thereby tension the transmission belt (50).

2. The screw-driving tool according to claim 1, characterized in that: The sliding structure (60) comprises a first sliding groove (61) arranged on the base plate (10) and a sliding block (62) arranged on the driving drum (40), and the sliding block (62) is slidably arranged in the first sliding groove (61).

3. The screw-driving tool according to claim 2, characterized in that: The driving drum (40) is located below the first screwing drum (20) and the second screwing drum (30), the first slide groove (61) extends in the vertical direction, the driving drum (40) has a counterweight block, and the driving drum (40) tensions the transmission belt (50) by the weight of the counterweight block.

4. The screw-driving tool according to claim 3, characterized in that: The sliding structure (60) further comprises a first limit block (63) and a second limit block (64) arranged on the sliding block (62); the first limit block (63) and the second limit block (64) are respectively arranged on both sides of the base plate (10) and both cooperate with the base plate (10) to limit the separation of the driving drum (40) from the base plate (10).

5. The screw-driving tool according to claim 2, characterized in that: The slider (62) comprises a mounting block (621) and a connecting shaft (622); the driving drum (40) is rotatably mounted on the mounting block (621); the connecting shaft (622) is arranged on a side of the mounting block (621) away from the driving drum (40) and is inserted into the first slide groove (61); the mounting block (621) is engaged with a stopper of the first side surface (11) of the base plate (10); the sliding structure (60) further comprises a connecting shaft (622) rotatably arranged on the connecting shaft (622) and located on the second side surface (12) of the base plate (10); A locking member (65), wherein the locking member (65) has a locking position and an unlocking position, and a flexible abutment member (651) is provided on a side of the locking member (65) facing the substrate (10). When the locking member (65) is located at the unlocking position, the flexible abutment member (651) is arranged opposite to the first slide groove (61). When the locking member (65) is located at the locking position, the flexible abutment member (651) abuts and cooperates with the second side surface (12) of the substrate (10) to lock the connecting shaft (622) in the first slide groove (61).

6. The screw-driving tool according to claim 5, characterized in that: The flexible abutment member (651) has a guiding inclined surface (652).

7. The screw-driving tool according to any one of claims 1 to 6, characterized in that: The base plate (10) is provided with a second slide groove (13), and the first twisting drum (20) is slidably arranged in the second slide groove (13) to move away from or closer to the second twisting drum (30).

8. The screw-driving tool according to claim 7, characterized in that: The screw-tightening tool also includes a slide plate (70), on which a guide groove (71) is arranged, and on which a guide block (14) is arranged on the base plate (10), and the guide block (14) is inserted into the guide groove (71), and when the first screw-tightening cylinder (20) slides along the second slide groove (13), the slide plate (70) moves synchronously with the first screw-tightening cylinder (20) and cooperates with the guide of the guide block (14).

9. The screw-driving tool according to any one of claims 1 to 6, characterized in that: The first rotating cylinder (20) comprises an inner cylinder (22) and an outer cylinder (23), wherein the inner cylinder (22) is inserted into the outer cylinder (23), and the outer cylinder (23) is provided with a meshing portion (231) adapted to the transmission belt (50), and the outer cylinder (23) can rotate along with the transmission belt (50), and the first matching portion (21) is provided on the inner cylinder (22), and an elastic coupling member (24) is provided between the inner cylinder (22) and the outer cylinder (23), and the outer cylinder (23) is engaged with the transmission belt (50) by the elastic coupling member. The elastic coupling member (24) applies a coupling force to the inner cylinder (22); the elastic coupling member (24) has a coupling state and a slipping state; when the elastic coupling member (24) is deformed, it switches from the coupling state to the slipping state; when the elastic coupling member (24) is in the coupling state, the outer cylinder (23) drives the inner cylinder (22) to rotate through the elastic coupling member (24); when the elastic coupling member (24) is in the slipping state, the outer cylinder (23) can rotate and the inner cylinder (22) remains stationary.

10. The screw-driving tool according to claim 9, characterized in that: A snap-fit ​​groove (221) is provided on the outer surface of the inner cylinder (22); the elastic coupling member (24) comprises a first connecting arm (241), a second connecting arm (242), and a snap-fit ​​protrusion (243) provided between the first connecting arm (241) and the second connecting arm (242); the first connecting arm (241) and the second connecting arm (242) are connected to the inner surface of the outer cylinder (23); and the snap-fit ​​protrusion (243) is snap-fitted in the snap-fit ​​groove (221).

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