A hand-held multi-screw synchronous tightening device

Abstract

The utility model discloses a handheld type many screw synchronous tightening device, include: shell, hand wheel and transmission assembly, the shell includes the casing and a plurality of support, the casing has the cavity, the bottom of the cavity has a plurality of first through -hole, a plurality of support is located the side of casing and is located on the lateral wall of the cavity, the branch has the second through -hole, the hand wheel is located the other side of casing, and the hand wheel with casing coaxial arrangement, transmission assembly includes the internal gear and a plurality of external gear, the internal gear is located the cavity, and the external gear is engaged with the internal gear and rotatably located the support, and the external gear has the connecting hole of connecting bolt head, and the connecting hole, first through -hole, second through -hole are opposite arrangement. Through one operation can simultaneously tighten a plurality of bolts, greatly shorten the assembly time, improve work efficiency.

Description

Technical Field

[0001] This utility model relates to the field of mechanical manufacturing, and in particular to a handheld multi-screw synchronous tightening device. Background Technology

[0002] In modern industrial production, especially in fields such as mechanical assembly, electronic equipment assembly, and automobile manufacturing, screw tightening is an extremely common and critical process. Traditional screw tightening methods mainly rely on manual tools (such as screwdrivers) or electric screwdrivers. While these methods are simple and easy to use, they are inconvenient to operate when multiple bolts need to be tightened simultaneously, requiring each bolt to be tightened one by one. Utility Model Content

[0003] Therefore, a handheld multi-screw synchronous tightening device is needed to solve the problem of inconvenience in tightening bolts one by one.

[0004] To achieve the above objectives, the inventors provide a handheld multi-screw synchronous tightening device, comprising: a housing, a handwheel, and a transmission assembly;

[0005] The outer casing includes a housing and a plurality of supports. The housing has a cavity, and the bottom of the cavity has a plurality of first through holes. The plurality of supports are disposed on the sidewall of the cavity and located on one side of the housing. The supports have second through holes.

[0006] The handwheel is located on the other side of the housing, and the handwheel and the housing are coaxially arranged;

[0007] The transmission assembly includes an internal gear and multiple external gears. The internal gear is disposed in the cavity. The external gear meshes with the internal gear and is rotatably disposed on the bracket. Each external gear corresponds to one bracket and one first through hole. The external gear has a connecting hole for connecting bolt heads. The connecting hole, the first through hole, and the second through hole are arranged opposite each other.

[0008] Furthermore: the bracket includes a support arm and a support portion, one end of the support arm is disposed on the side wall of the cavity, the other end of the support arm is disposed on the side wall of the support portion, the support portion supports the rotatable external gear, and the support portion has the second through hole.

[0009] Furthermore, the bracket and the housing are integrally formed.

[0010] Furthermore: the external gear has a circular groove between the teeth and the connecting hole, and the bracket has a circular protrusion that extends into the groove and is rotatably connected to the groove.

[0011] Furthermore: the internal gear has 62 teeth, and the external gear has three teeth, each with 12 teeth.

[0012] Furthermore, the housing also includes a handle, which is disposed on the housing.

[0013] Furthermore: the handwheel is inserted into the housing.

[0014] Furthermore: the handwheel has a socket at its shaft center, and the housing has a plug at its shaft center on the side facing the handwheel. The socket center is inserted into the plug, and the socket center and the plug are non-circular.

[0015] Furthermore: the internal gear is engaged in the cavity, and the internal gear has a base plate on the side of the teeth near the handwheel, the base plate serving as the bottom of the cavity.

[0016] Furthermore: the cross-section of the outer periphery of the internal gear is triangular, and the shape of the sidewall of the cavity is adapted to the shape of the outer periphery of the internal gear;

[0017] The connection hole is an internal hexagonal hole.

[0018] Unlike existing technologies, the above solution involves aligning each bolt head with a specific connecting hole. The user rotates the handwheel, causing the internal gear to rotate, which in turn drives multiple external gears to rotate synchronously. This allows multiple screwdriver heads to rotate simultaneously, tightening multiple bolts at once. This single operation enables the tightening of multiple bolts, significantly reducing assembly time and improving work efficiency.

[0019] The above description of the utility model is merely an overview of the technical solution of this application. In order to enable those skilled in the art to better understand the technical solution of this application and to implement it based on the description and drawings, and to make the above-mentioned objectives and other objectives, features and advantages of this application easier to understand, the following description is provided in conjunction with the specific embodiments and drawings of this application. Attached Figure Description

[0020] The accompanying drawings are only used to illustrate the principles, implementation methods, applications, features, and effects of specific embodiments of this utility model and other related contents, and should not be considered as limitations on this application.

[0021] Figure 1 This is one of the perspective views of the handheld multi-screw synchronous tightening device in this embodiment;

[0022] Figure 2 This is a schematic diagram of the meshing of the internal and external gears in this embodiment;

[0023] Figure 3 This is a perspective view of the outer casing in this embodiment;

[0024] Figure 4This is a perspective view of the external gear in this embodiment;

[0025] Figure 5 This is an exploded view of the external gear and the bracket in this embodiment;

[0026] Figure 6 This is a top view of the outer casing in this embodiment;

[0027] Figure 7 This is the second perspective view of the handheld multi-screw synchronous tightening device in this embodiment;

[0028] Figure 8 This is a perspective view of the internal gear in this embodiment.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Outer shell; 11. Housing; 111. Cavity; 12. Bracket; 121. Support arm; 122. Support part; 13. First through hole; 14. Second through hole; 15. Handle; 16. Insert block; 17. Protrusion;

[0031] 2. Handwheel; 21. Socket;

[0032] 3. Transmission assembly; 31. Internal gear; 311. Triangle; 312. Base plate; 32. External gear; 321. Connecting hole; 322. Channel. Detailed Implementation

[0033] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.

[0034] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0035] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.

[0036] In the description of this application, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " in this document generally indicates that the preceding and following objects have an "or" logical relationship.

[0037] In this application, terms such as “first” and “second” are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy or order relationship between these entities or operations.

[0038] Without further limitations, the use of terms such as “comprising,” “including,” “having,” or other similar open-ended expressions in this application is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a list of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0039] Similar to the understanding in the Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments in this application, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.

[0040] In the description of the embodiments of this application, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the purpose of describing the specific embodiments of this application or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0041] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this application, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral arrangement; it can be a direct connection or an indirect connection through an intermediate medium; it can be a relationship of two components combined together, an interaction relationship between two components, or a connection within two structures. Those skilled in the art to which this application pertains can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0042] Please see Figures 1 to 8 This embodiment provides a handheld multi-screw synchronous tightening device, including: a housing 1, a handwheel 2, and a transmission assembly 3;

[0043] The outer casing 1 includes a housing 11 and a plurality of supports 12. The housing 11 has a cavity 111. The bottom of the cavity 111 has a plurality of first through holes 13. The plurality of supports 12 are disposed on the side wall of the cavity 111 and located on one side of the housing 11. The supports 12 have second through holes 14.

[0044] Handwheel 2 is located on the other side of housing 11, and handwheel 2 and housing 11 are coaxially arranged;

[0045] The transmission assembly 3 includes an internal gear 31 and multiple external gears 32. The internal gear 31 is disposed in the cavity 111. The external gears 32 mesh with the internal gears 31 and are rotatably disposed on the bracket 12. Each external gear 32 corresponds to one bracket 12 and one first through hole 13. The external gear 32 has a connecting hole 321 for connecting bolt heads. The connecting hole 321, the first through hole 13, and the second through hole 14 are arranged opposite each other.

[0046] The outer casing 1 is a protective structure for the device, connecting the handwheel 2 and also concealing the internal transmission assembly 3 for an aesthetically pleasing appearance. The transmission assembly 3 is a crucial component of the device, requiring synchronized tightening and, within permissible limits, the ability to be disassembled to any size.

[0047] In use, each bolt head is aligned with a connecting hole 321. The user turns the handwheel 2, which drives the internal gear 31 to rotate, thereby driving multiple external gears 32 to rotate synchronously. This allows multiple screwdriver heads to rotate simultaneously, tightening multiple bolts at the same time. Multiple bolts can be tightened simultaneously in a single operation, greatly reducing assembly time and improving work efficiency.

[0048] Please see Figure 1 , Figure 3 , Figure 5 and Figure 6In this embodiment, the bracket 12 includes a support arm 121 and a support portion 122. One end of the support arm 121 is disposed on the side wall of the cavity 111, and the other end of the support arm 121 is disposed on the side wall of the support portion 122. The support portion 122 supports the rotatable external gear 32 and has a second through hole 14. Figure 3 As shown, the support arm 121 is long and narrow, and the support part 122 is annular. The inner ring of the annular part serves as the second through hole 14. The second through hole 14 can determine the position of the bolt and also prevent the bolt from sliding and thus failing to lock.

[0049] Please see Figure 1 , Figure 3 , Figure 5 and Figure 6 In this embodiment, the bracket 12 and the housing 11 are integrally formed, which avoids the weak connection between the separate bracket 12 and the housing 11 and enhances the overall rigidity.

[0050] Please see Figure 3 , Figure 4 and Figure 5 In this embodiment, the external gear 32 has a circular groove 322 between its teeth and the connecting hole 321. The bracket 12 has a circular protrusion 17 that extends into the groove 322 and is rotatably connected to it. A slight gap is left between the groove 322 and the protrusion 17 to ensure smooth rotation. The protrusion 17 fixes the gear to the bracket 12, fixing its three translational degrees of freedom so that it cannot move, and provides a certain thickness. In some embodiments, the positions of the groove and the protrusion are interchanged.

[0051] In some other embodiments, rotation between the support and the housing can be achieved via bearings.

[0052] Please see Figure 2 In this embodiment, the internal gear 31 has 62 teeth, and the external gear 32 has three teeth, each with 12 teeth.

[0053] Please see Figure 1 In this embodiment, the outer shell 1 also includes a handle 15, which is disposed on the outer shell 11. The handle 15 can be integrally molded or assembled separately on the outer shell 11, and its shape conforms to ergonomic design for easy gripping.

[0054] Please see Figure 7 In this embodiment, the handwheel 2 is inserted into the housing 11. The insertion can be completed without tools, thus improving the efficiency of operation.

[0055] Please see Figure 7 and Figure 8In this embodiment, the handwheel 2 has a hole 21 on its shaft and a block 16 on the shaft of the side of the housing 11 facing the handwheel 2. The hole 21 and the block 16 are inserted into each other. The hole 21 and the block 16 are non-circular, which can effectively prevent the handwheel 2 from sliding circumferentially with the housing 11. Figure 7 As shown, the plug 16 and the socket 21 are square. The user aligns the handwheel 2 with the plug 16 on the housing 11 and pushes it in axially so that the plug 16 is inserted into the socket 21. Then the user can rotate the handwheel 2, and the plug 16 drives the socket 21 to rotate synchronously, thereby transmitting the rotational motion to the transmission component 3 inside the housing 11.

[0056] Please see Figure 3 , Figure 5 and Figure 8 In this embodiment, the internal gear 31 is engaged in the cavity 111. After engagement, the internal gear 31 is stably fixed in the cavity 111, and there is no relative rotation between the internal gear 31 and the housing 11 support 12. The internal gear 31 has a base plate 312 on the side of the teeth near the handwheel 2, which serves as the bottom of the cavity 111. The internal gear 31 has two parts: the part near the external gear 32 is the teeth (i.e., the internal gear ring), and the part near the handwheel 2 is the base plate 312, which has a first through hole 13.

[0057] Please see Figure 3 , Figure 5 and Figure 8 In this embodiment, the cross-section of the outer periphery of the internal gear 31 is triangular 311, with a three-dimensional shape similar to a spindle, protruding in the middle and narrowing at both ends, and the structure is as follows. Figure 8 As shown. The shape of the sidewall of cavity 111 matches the shape of the outer periphery of internal gear 31, and its cross-section is also triangular, as shown in the structure. Figure 3 and Figure 5 As shown, this allows the internal gear 31 to engage and remain fixed.

[0058] In this embodiment, the connecting hole 321 is an internal hexagonal hole, which is adapted to the hexagonal bolt head.

[0059] In this embodiment, the components of the handheld multi-screw synchronous tightening device are manufactured and designed using 3D printing technology. For the internal gear transmission, although the material support is relatively increased compared to the external gear, it can effectively connect to the outer shell as an internal transmission device, reducing the number of printed parts, resulting in a compact structure that meets the requirements of 3D printing. Compared to other mechanisms, gear transmission has significant advantages in this design. Gear transmission structures are simple and easy to design; the internal gear transmission can connect to the outer shell; and it has a high degree of integration, conforming to the characteristics of 3D printing. Because the outer shell is connected to the internal gear, we adopted an integrated design method to separate the outer shell from the internal gear for the handle and handwheel connection, allowing for direct assembly. Rotational cutting is performed at the connection between the cavity and the internal gear, followed by slicing. The support angle can be set to less than 30° in the software, thus avoiding support at this point. Because the upper part contains gears, printing in mid-air would reduce its accuracy, so we used the handwheel connection as the base for printing. Furthermore, printing with the handwheel connection as the base provides a larger printing support area.

[0060] This product generates minimal waste during the 3D printing process and is extremely easy to disassemble, achieving the goal of integrating 3D printing with printing technology. This product also includes a handheld multi-screw synchronous tightening device. Its design utilizes a mechanical transmission mechanism, showcasing the product's practicality and convenience, enabling its application in everyday life.

[0061] Finally, it should be noted that although the above embodiments have been described in the text and drawings of this application, this should not limit the scope of patent protection of this application. Any technical solutions that are based on the essential concept of this application and utilize the content described in the text and drawings of this application, resulting in equivalent structural or procedural substitutions or modifications, as well as the direct or indirect application of the technical solutions of the above embodiments to other related technical fields, are all included within the scope of patent protection of this application.

Claims

1. A handheld multi-screw synchronous tightening device, characterized in that, include: Housing, handwheel, and transmission components; The outer casing includes a housing and a plurality of supports. The housing has a cavity, and the bottom of the cavity has a plurality of first through holes. The plurality of supports are disposed on the sidewall of the cavity and located on one side of the housing. The supports have second through holes. The handwheel is located on the other side of the housing, and the handwheel and the housing are coaxially arranged; The transmission assembly includes an internal gear and multiple external gears. The internal gear is disposed in the cavity. The external gear meshes with the internal gear and is rotatably disposed on the bracket. Each external gear corresponds to one bracket and one first through hole. The external gear has a connecting hole for connecting bolt heads. The connecting hole, the first through hole, and the second through hole are arranged opposite each other.

2. The handheld multi-screw synchronous tightening device according to claim 1, characterized in that: The bracket includes a support arm and a support portion. One end of the support arm is located on the side wall of the cavity, and the other end of the support arm is located on the side wall of the support portion. The support portion supports the rotatable external gear and has a second through hole.

3. The handheld multi-screw synchronous tightening device according to claim 2, characterized in that: The bracket and the housing are integrally formed.

4. The handheld multi-screw synchronous tightening device according to claim 1 or 2, characterized in that: The external gear has a circular groove between the teeth and the connecting hole, and the bracket has a circular protrusion that extends into the groove and is rotatably connected to the groove.

5. The handheld multi-screw synchronous tightening device according to claim 1, characterized in that: The internal gear has 62 teeth, and the external gear has three teeth, each with 12 teeth.

6. The handheld multi-screw synchronous tightening device according to claim 1, characterized in that: The housing also includes a handle, which is disposed on the housing.

7. The handheld multi-screw synchronous tightening device according to claim 1, characterized in that: The handwheel is inserted into the housing.

8. The handheld multi-screw synchronous tightening device according to claim 7, characterized in that: The handwheel has a hole at its shaft center, and the housing has a block at its shaft center on the side facing the handwheel. The hole and the block are inserted into each other. The hole and the block are not circular.

9. The handheld multi-screw synchronous tightening device according to claim 1, characterized in that: The internal gear is engaged in the cavity, and the internal gear has a base plate on the side of the teeth near the handwheel, which serves as the bottom of the cavity.

10. The handheld multi-screw synchronous tightening device according to claim 1, characterized in that: The outer periphery of the internal gear has a triangular cross-section, and the shape of the sidewall of the cavity is adapted to the shape of the outer periphery of the internal gear. The connection hole is an internal hexagonal hole.

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