Rotating shaft pushing and screwing wrench

Abstract

The utility model discloses a rotating shaft pushing and screwing wrench, and aims to solve the technical problem that an existing traditional wrench needs a large run length during screwing and cannot be suitable for a limited space environment. The two fork arms are arranged at the end part of the wrench body and are oppositely arranged; the plurality of sliding sheets are sequentially arranged in an array manner along the direction perpendicular to the two fork arms and respectively stretch out and draw back along the corresponding central line direction of the fork arms; the rotating shaft is arranged below the corresponding sliding sheets of the wrench body in a penetrating manner and is parallel to the array direction of the sliding sheets; the cams are sequentially fixed to the rotating shaft in an array mode, correspond to the sliding pieces one to one and are used for pushing the sliding pieces to stretch out and draw back correspondingly so as to push a bolt to be screwed to rotate. The rotating shaft pushing and screwing wrench can adapt to limited operation space, and compared with a traditional wrench, the rotating shaft pushing and screwing wrench can greatly improve the bolt installation efficiency.

Description

Technical Field

[0001] This application relates to the technical field of hardware tools, and particularly relates to a rotating shaft pushing and screwing wrench. Background Art

[0002] With the development of power tools, they have gradually replaced manual tools and are widely used in industrial manufacturing and maintenance. An electric wrench is a tool driven by electricity and is usually used to tighten and loosen components such as screws and nuts. It generates torque through an internal electric motor, connects the wrench head to the workpiece, and realizes fast and efficient tightening operations. An electric wrench usually consists of a power source, a motor, a transmission device, and a wrench head, etc. Among them, the power source can be a battery or an external power source, and the motor is responsible for rotating the power transmitted to the wrench head.

[0003] However, the existing bolt specifications are diverse, and the installation positions of bolts vary greatly. In the process of implementing the technical solutions in the embodiments of this application, the inventor found that in the process of tightening bolts with traditional wrenches, there are at least the following technical problems: Traditional electric wrenches are large in size and have a large free stroke for open-end wrenches. In the case of limited installation space, tools such as open-end wrenches cannot be applied. Even in some special occasions, a ratchet wrench with a very small free stroke cannot be used, and only the open-end wrench can be used to slowly tighten, resulting in low installation efficiency and wasting labor.

[0004] The information disclosed in this background art section is only used to deepen the understanding of the background art of this disclosure, and should not be regarded as an admission or any form of suggestion that this information constitutes the prior art known to those skilled in the art. Summary of the Invention

[0005] In view of at least one of the above technical problems, this disclosure provides a rotating shaft pushing and screwing wrench, aiming to solve the technical problem that traditional wrenches require a large free stroke for screwing and cannot be applied to limited space environments.

[0006] According to one aspect of this disclosure, a rotating shaft pushing and screwing wrench is provided, which includes a wrench body, two fork arms arranged oppositely at the end of the wrench body, a plurality of sliding plates arranged in sequence along a direction perpendicular to the two fork arms and telescoping respectively along the corresponding center lines of the fork arms, a rotating shaft passing through the wrench body below the corresponding sliding plates and parallel to the array direction of the sliding plates, a plurality of cams arranged in sequence and fixed at the rotating shaft and corresponding to the sliding plates one by one for pushing the corresponding sliding plates to telescope to push the bolt to be screwed to rotate, and a driving motor for driving the cams.

[0007] In some embodiments of this disclosure, chutes corresponding to the ends of the fork arms of the wrench body and corresponding to each of the sliding plates are provided for limiting the telescoping of the sliding plates along the corresponding center lines of the fork arms.

[0008] In some embodiments of the present disclosure, the length of the fork arm is greater than the maximum telescopic stroke of the sliding plate.

[0009] In some embodiments of the present disclosure, the width between the two fork arms is greater than the diameter of the circumscribed circle of the bolt to be screwed.

[0010] In some embodiments of the present disclosure, the corresponding end face of the sliding plate is tangentially corresponding to the edge of the cam.

[0011] In some embodiments of the present disclosure, when the rotating shaft rotates one circle, the cam correspondingly pushes the bolt to be screwed to rotate by N degrees, where N = 360° / the number of edges of the bolt to be screwed.

[0012] In some embodiments of the present disclosure, the number of the sliding plates satisfies that at least two sliding plates are in contact with a single edge surface corresponding to the bolt to be screwed in the initial state of each sliding plate.

[0013] In some embodiments of the present disclosure, control buttons for controlling the start / stop, rotation speed, and rotation direction of the drive motor are provided on the wrench body.

[0014] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0015] The screwing of the bolt is realized by the sliding plates pushed by the cams, thereby avoiding the problem that the wrench needs to be rotated greatly during use, resulting in a large stroke that cannot adapt to the limited working space; and the basic rotation angle is divided by the N-degree rotation angle of the bolt, thereby solving the problem of limited perimeter of the cam size profile, and driving the bolt to be continuously tightened or loosened under the repeated rotation of the cam. Description of the Drawings

[0016] Figure 1 It is a partial structural schematic diagram of the rotating shaft pushing the screwing wrench in an embodiment of the present application.

[0017] Figure 2 It is a schematic diagram of the process of screwing the bolt by 60 degrees in an embodiment of the present application.

[0018] In the above figures, 1 is the wrench body, 2 is the fork arm, 21 is the guide plate, 3 is the sliding plate, 4 is the cam, 5 is the rotating shaft, and 6 is the bolt to be screwed. Detailed Embodiments

[0019] In the description of the present application, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "vertical", "horizontal", "clockwise", "counterclockwise", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0020] To better understand the technical solution of the present application, the above technical solution will be described in detail below in conjunction with the drawings of the specification and specific implementation manners.

[0021] To solve the problems that traditional wrenches have a large stroke and high requirements for the use space, and cannot adapt to the installation environment with a compact installation structure and limited installation space, this example discloses a rotating shaft pushing and screwing wrench to achieve efficient installation of bolts in the case where the axial space along the bolt screw is limited and the effective stroke allowed for the wrench to screw is also limited. See Figure 1 , Figure 1 Only a partial structure of the rotating shaft pushing and screwing wrench is shown, which specifically includes a wrench body 1, a fork arm 2, a sliding piece 3, and a cam 4.

[0022] The wrench body 1 is used for manual holding when the wrench is in use. At the end of the wrench body 1, two relatively arranged fork arms 2 are provided. A screwing operation area of the rotating shaft pushing and screwing wrench is formed between the two fork arms 2. The rotating shaft pushing and screwing wrench rotates the bolt to be screwed that is stuffed into this area. Therefore, in this embodiment, the distance between the two fork arms 2 is greater than the circumscribed circle diameter of the bolt to be screwed. Thus, after the bolt is stuffed between the two fork arms 2, it can rotate smoothly between the two fork arms, avoiding spatial position interference with the fork arms, and further avoiding the problem that the working stroke cannot adapt to the limited space when the bolt is tightened or disassembled and the wrench needs to be rotated.

[0023] To achieve the rotation of the bolt to be screwed without rotating the wrench body, see Figure 1, a plurality of slides 3 are arranged in an array in sequence between the two fork arms 2 along the vertical direction perpendicular to the two fork arms, and each slide 3 can be extended and retracted along the corresponding midline direction of the fork arms 2, so that the end of the slide 3 contacts the edge surface of the bolt to be screwed between the two fork arms 2, thereby realizing the rotation of the bolt 6 to be screwed between the two fork arms through the push of the slide 3. Among them, in order to ensure the reliable contact and force transmission between the slide 3 and the bolt 6 to be screwed, in this embodiment, the end surface of the slide 4 in contact with the bolt 6 to be screwed has a certain roughness, thereby increasing the friction between the slide and the bolt to be screwed when in contact, avoiding problems such as slipping when the thrust is transmitted from the slide to the bolt. In addition, in this embodiment, the length of the two fork arms is greater than the maximum telescopic stroke of the slide, so that the bolt to be screwed is located between the two fork arms when it is rotated, which facilitates the alignment operation of the slide and the bolt when the wrench is used.

[0024] In addition, in order to achieve reliable extension and retraction of the slide 3 along the direction of the fork arm and avoid problems such as deviation and tilting, in the present embodiment, a slide cavity for assembling each slide 3 is provided at the end of the two corresponding fork arms of the wrench body 1. The slide cavity is formed by two fork arms and two guide plates 21 perpendicular to the two fork arms. Each slide is inserted into the slide cavity, and a limiting wing plate is provided at the other end of the slide 3. The limiting wing plate abuts against the corresponding end surface of the guide plate 21 to limit the slide to extend out of the maximum distance of the slide cavity and prevent the slide from falling off the slide cavity. During the bolt tightening process, each slide extends out to a different length, thereby pushing the bolt to rotate in the corresponding direction. However, due to the difference in the movement displacement distances between the slides, in order to avoid the adverse mutual influence of the movement between the slides, in this embodiment, a plurality of guide ribs are relatively arranged on the inner edge surfaces of the two relatively arranged guide plates 21, and the direction of the guide ribs is consistent with the movement direction of the slide, and the spacing between adjacent guide ribs is consistent with the width of the slide, thereby forming a slide groove matching each slide. On the one hand, due to the thickness of the guide ribs, a certain small interval is provided between the adjacent slides 3, so that the adjacent slides are prevented from contacting each other and causing friction, which affects the effective extension length of the slide and the power transmission of the slide; on the other hand, through the slide grooves formed by the guide ribs, the moving direction of each slide 3 can be more effectively limited, so as to avoid the problem of displacement and tilting of the slide due to the force when the slide moves, which affects the normal use of the wrench.

[0025] In order to realize that each slide can extend a specific length at a corresponding time, thereby pushing the bolt in contact with it to rotate reliably, in this embodiment, see Figure 1, a rotating shaft 5 parallel to the sliding vane array direction is passed through the lever body 1 below the sliding vane 3. A plurality of cams 4 corresponding to each sliding vane 3 one by one are fixedly arranged in sequence on the rotating shaft 5. The end face of the sliding vane 3 is in tangential contact with the edge of the corresponding cam 4. Thus, as the rotating shaft 5 rotates, the cam 4 pushes the corresponding sliding vane 3 in contact with it to expand and contract accordingly. Among them, since the distances from the points on the edge contour of the cam to the center of the rotating shaft are different, after corresponding the movement trajectory of the sliding vane during the process of screwing the bolt to this distance, the on-demand expansion and contraction of the sliding vane is realized through the outer edge contour of the cam.

[0026] However, considering that the perimeter of the outer edge contour of the cam is limited by the size of the wrench body, it is impossible to achieve the purpose of screwing the bolt in place after the cam rotates one circle. Therefore, in this embodiment, it is set that the outer edge contour of the cam corresponds to the rotation of the bolt by N degrees, where N = 360° / the number of edges of the bolt to be screwed. Thus, after the bolt rotates by N degrees, the contour position of the bolt coincides with the contour position at the initial moment. In this embodiment, refer to Figure 2 , the bolt to be screwed is a hexagonal bolt, and the number of its edges is 6. Then the corresponding N is 60°. That is, after the bolt rotates by 60 degrees, the edge contour of the bolt coincides with the edge contour before rotation. Therefore, after continuously rotating 6 sixty-degree angles, the bolt can rotate one circle. So, in this embodiment, with N degrees as the basic rotation angle, that is, after the rotating shaft 5 rotates one circle and drives the cam to rotate one week, the bolt just rotates by N degrees under the push of the sliding vane. Before and after this rotation action, the edge contour position of the bolt is the same. As the rotating shaft continues to rotate, the continuous screwing action of the bolt can be realized. In addition, in order to ensure the reliable push of the sliding vane on the bolt, in this embodiment, in the initial state, at least two sliding vanes are in contact with a single edge surface corresponding to the bolt to be screwed, thereby increasing the thrust received by the single edge surface.

[0027] In this embodiment, the rotating shaft 5 is drivingly connected to a driving motor. The driving force of the rotating shaft is provided by the driving motor, and then is converted into the driving force on the bolt through the cam and the sliding vane. In some other embodiments, a speed reduction structure is provided in the driving motor to increase the output torque of the driving motor. Additionally, in this embodiment, a control button for controlling the start-stop, rotation speed, and rotation direction of the driving motor is provided at the lever body 1. The rotation direction of the driving motor is set through the button, thereby realizing the tightening or disassembling action of the bolt.

[0028] When the rotating shaft pushing and screwing wrench disclosed in this example is in use, each sliding piece of the wrench is correspondingly abutted against the bolt to be screwed. The wrench is slightly rotated to adjust the bolt to be screwed to be in close contact with each sliding piece. Then, the rotating shaft pushing and screwing wrench is started. Driven by the cam, each sliding piece rotates orderly. After the bolt is stressed, it rotates. During this process, it is necessary to manually push the wrench to make the bolt in close contact with the sliding piece, so as to realize the rotation of the bolt without rotating the wrench, achieving the purpose of adapting to the limited working space. In some working scenarios with high requirements for bolt fastening, due to the limited fastening degree of the rotating shaft pushing and screwing wrench, after the sliding piece can no longer drive the bolt to continue rotating, a manual wrench is used to tighten the remaining small distance. The tightening of the manual wrench only requires a small stroke. Therefore, compared with only using a manual wrench, this rotating shaft pushing and screwing wrench can greatly improve the bolt installation efficiency.

[0029] Although some preferred embodiments of the present application have been described, those skilled in the art can make additional changes and modifications to these embodiments once they learn the basic creative concepts. Therefore, the appended claims are intended to be construed as including the preferred embodiments as well as all changes and modifications falling within the scope of the present application.

[0030] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of its inventive concept. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these modifications and variations.

Claims

1. A rotating wrench with a shaft for pushing and screwing, characterized in that, It includes a wrench body, two fork arms arranged oppositely at the end of the wrench body, a plurality of sliding plates arranged in sequence along a direction perpendicular to the two fork arms and telescoping respectively along the corresponding median lines of the fork arms, a rotating shaft passing through the wrench body below the corresponding sliding plates and parallel to the array direction of the sliding plates, a plurality of cams fixedly arranged in sequence at the rotating shaft and corresponding to the sliding plates one by one for pushing the corresponding telescoping of the sliding plates to drive the bolt to be rotated, and a driving motor for driving the cams.

2. The shaft pushing and screwing wrench according to claim 1, characterized in that, At the end of the wrench body corresponding to the fork arms, there are chutes corresponding to each of the sliding plates and used for limiting the telescoping of the sliding plates along the corresponding median lines of the fork arms.

3. The shaft pushing and screwing wrench according to claim 1, characterized in that, The length of the fork arms is greater than the maximum telescoping stroke of the sliding plates.

4. The shaft pushing and screwing wrench according to claim 1, wherein, The width between the two fork arms is greater than the circumscribed circle diameter of the bolt to be rotated.

5. The rotating shaft pushing and screwing wrench according to claim 1, wherein, The corresponding end face of the sliding plate is tangential to the edge of the cam.

6. The shaft push-rotating wrench according to claim 1, wherein, When the rotating shaft rotates one circle, the cam correspondingly drives the bolt to be rotated by N degrees, where N = 360° / the number of edges of the bolt to be rotated.

7. The shaft pushing and screwing wrench according to claim 1, characterized in that, The number of the sliding plates satisfies that at least two of the sliding plates are in contact with a single edge surface corresponding to the bolt to be rotated in the initial state of each sliding plate.

8. The shaft pushing and screwing wrench according to claim 1, characterized in that, On the wrench body, there are control buttons for controlling the start-stop, rotation speed and rotation direction of the driving motor.

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