Nut tightening device

Abstract

The application provides a nut screwing device, which comprises a base, a first mounting seat and a rotating mechanism, the first mounting seat is provided with a first accommodating cavity for accommodating a workpiece, the second mounting seat is provided with a second accommodating cavity for accommodating a nut, a first axis of the first accommodating cavity coincides with a second axis of the second accommodating cavity, the rotating mechanism is used for driving the nut to rotate around the second axis, and at least one of the second mounting seat and the first mounting seat can move along the second axis relative to the base, so as to change the distance between the first accommodating cavity and the second accommodating cavity. The device can realize the alignment between the nut and the workpiece, improve the assembly effect between the nut and the workpiece, and reduce the risk of improper nut assembly.

Description

Technical Field

[0001] This invention relates to the field of electronic product assembly technology, and in particular to a nut tightening device. Background Technology

[0002] In current technology, screws and nuts on electronic pens are tightened manually. However, during manual tightening, misalignment between the nut and the electronic pen makes it difficult to properly assemble the nut. A misaligned nut may cause some components of the electronic pen to fail to hold in place, or even damage some components, thereby reducing the structural stability and reliability of the electronic pen. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention proposes a nut tightening device that can assist in the alignment between the nut and the workpiece, thereby improving the assembly effect between the nut and the workpiece.

[0004] A nut-tightening device according to an embodiment of the present invention includes: a base; a first mounting base mounted on the base, the first mounting base having at least one first receiving cavity for accommodating a workpiece, the wall surface of the first receiving cavity including a first arc surface, the first arc surface being used to abut against the outer peripheral surface of the workpiece, the first receiving cavity having a first axis, and any two points on the first arc surface being equidistant from the first axis; and a second mounting base mounted on the base, the second mounting base having a second receiving cavity for accommodating a nut, the wall surface of the second receiving cavity including a second arc surface, the second arc surface being used to abut against the outer peripheral surface of the nut, the second receiving cavity having a second axis, and any two points on the second arc surface being equidistant from the first axis. The distance between the second axes is equal; a rotating mechanism, a portion of which is located in the second receiving cavity and used to fix the nut, the rotating mechanism is used to drive the nut to rotate about the second axis; each second receiving cavity is correspondingly provided with one first receiving cavity, for a corresponding second receiving cavity and a first receiving cavity: the first axis and the second axis coincide, at least one of the second mounting base and the first mounting base can move relative to the base along the second axis to change the distance between the first receiving cavity and the second receiving cavity, the end of the first receiving cavity facing the second mounting base and the end of the second receiving cavity facing the first mounting base are both open.

[0005] The nut-tightening device according to embodiments of the present invention has at least the following beneficial effects: Since the first and second axes coincide, after the nut is placed into the second receiving cavity and the workpiece is placed into the first receiving cavity, the central axis of the workpiece coincides with the central axis of the nut, aligning the workpiece and the nut. The nut-tightening device of the present invention can align workpieces and nuts that need to be assembled together, and since the second mounting base moves along the second axis towards the first mounting base, the workpiece and nut remain aligned during the process of initially approaching each other until they are engaged, and during the subsequent tightening process. Therefore, this nut-tightening device can reduce the risk of the nut being misaligned relative to the workpiece, thereby reducing the risk of incorrect nut assembly.

[0006] According to some embodiments of the present invention, the rotating mechanism is configured as a pneumatic screwdriver; or, the rotating mechanism is configured as an electric screwdriver; or, the rotating mechanism includes a screwdriver bar, a rotating wheel, and a handle, one end of the screwdriver bar is located in the second receiving cavity and is used to connect with the nut, the rotating wheel is fixed relative to the screwdriver bar, the rotating wheel and the screwdriver bar are capable of rotating synchronously relative to the second mounting base, the rotation axis of the rotating wheel and the rotation axis of the screwdriver bar are both coincident with the second axis, the handle is connected to the rotating wheel, and the handle is spaced apart from the second axis in the radial direction of the rotating wheel.

[0007] According to some embodiments of the present invention, the rotating mechanism includes: a wrench bar, one end of which is located in the second receiving cavity and is used to connect with the nut; a rotating wheel; a coupling including a first connecting unit and a second connecting unit magnetically connected to each other, the first connecting unit being fixedly connected to the wrench bar, the second connecting unit being fixedly connected to the rotating wheel, and the rotation axis of the rotating wheel and the rotation axis of the wrench bar both coinciding with the second axis; a handle connected to the rotating wheel, the handle being spaced apart from the second axis in the radial direction of the rotating wheel; when the nut is not tightened, the first connecting unit and the second connecting unit are fixed to each other; when the nut is tightened, the second connecting unit is rotatable relative to the first connecting unit.

[0008] According to some embodiments of the present invention, the coupling further includes a first elastic element, one end of which is connected to the first connecting unit and the other end of which is connected to the second mounting base, the elastic force of which is used to keep the first connecting unit and the second connecting unit in contact; and / or, the coupling further includes a second elastic element, one end of which is connected to the second connecting unit and the other end of which is connected to the wheel, the elastic force of which is used to keep the first connecting unit and the second connecting unit in contact.

[0009] According to some embodiments of the present invention, the first mounting base includes: a first plate, connected to the base, the first plate having a groove, the wall of the groove including the first arc surface; and a second plate, movably connected to the first plate, the second plate covering a portion of the groove, so that the first plate and the second plate together define the first receiving cavity.

[0010] According to some embodiments of the present invention, the wall surface of the first receiving cavity includes a limiting plane, the limiting plane is located on the second plate, the limiting plane is disposed facing the first arc surface, and the limiting plane and the first arc surface together surround the workpiece.

[0011] According to some embodiments of the present invention, the first mounting base is movable relative to the base along the extension direction of the first axis. The nut tightening device further includes: a fixing block fixedly connected to the base; an adjusting member passing through the fixing block and threadedly connected to the base, the adjusting member including an abutting end abutting against the first mounting base, the adjusting member being rotatable relative to the fixing block to change the distance between the abutting end and the fixing block, the rotation axis of the adjusting member being parallel to or coincident with the first axis; and a third elastic member, the two ends of the third elastic member being respectively connected to the fixing block and the first mounting base, the elastic force of the third elastic member being used to keep the abutting end abutting against the first mounting base.

[0012] According to some embodiments of the present invention, the second mounting base is provided with a storage channel for storing at least one of the nuts, the top end of the storage channel is disposed on the outer surface of the second mounting base to form an inlet for the nut to enter the storage channel, and the bottom end of the storage channel communicates with the second receiving cavity.

[0013] According to some embodiments of the present invention, the rotating mechanism includes a screwdriver, the screwdriver comprising: a main body, which is cylindrical, one end of the main body being located in the second receiving cavity, and the end face of the main body located in the second receiving cavity being a reference surface; and a plurality of protrusions, which are connected to the reference surface and protrude relative to the reference surface, and the plurality of protrusions are distributed circumferentially at intervals along the main body.

[0014] According to some embodiments of the present invention, the nut tightening device further includes: a camera located above one end of the first mounting base near the second mounting base, the camera being disposed downwards; and a display screen communicatively connected to the camera, the display screen being used to display images captured by the camera.

[0015] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0017] Figure 1 This is a schematic diagram of a workpiece in one embodiment of the present invention;

[0018] Figure 2 for Figure 1 A partial schematic diagram of the workpiece;

[0019] Figure 3 This is a schematic diagram of the apparatus according to the first embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of the first mounting base in the first embodiment;

[0021] Figure 5 for Figure 4 A schematic diagram showing the state of the first mounting base after the workpiece has been installed.

[0022] Figure 6 This is a schematic diagram of the first mounting base in the first embodiment from another perspective;

[0023] Figure 7 for Figure 4 A cross-sectional view of the first mounting bracket in the middle;

[0024] Figure 8 This is a schematic diagram of the second mounting base, the rotating mechanism, and the base plate in the first embodiment;

[0025] Figure 9 for Figure 8 A schematic diagram of the components shown;

[0026] Figure 10 This is a schematic diagram of the second receiving cavity and storage channel in the first embodiment;

[0027] Figure 11 This is a schematic diagram of the end of the squeegee in the first embodiment;

[0028] Figure 12 This is a schematic diagram of the apparatus according to the first embodiment of the present invention.

[0029] Figure label:

[0030] 100-Workpiece, 101-Nut, 102-Connecting groove, 103-Threaded rod;

[0031] 200-Nut tightening device, 201-Base, 202-Base plate, 203-Heightening block, 204-First mounting seat, 205-Second mounting seat, 206-Camera, 207-Display screen, 208-Upright pole, 209-Horizontal bar, 210-Rotating mechanism, 211-Adjusting component, 212-Snap fastener, 213-Fixing block, 214-Third elastic element, 215-First slide rail, 216-First slider, 217-Second slide rail, 218-Second slider, 219-First elastic element, 220-Second elastic element, 221-Busset;

[0032] 301-First plate, 302-Second plate, 303-First receiving cavity, 304-First axis, 305-Limiting plane, 306-First arc surface;

[0033] 401 - Inlet, 402 - Storage channel, 403 - Second receiving cavity, 404 - Second axis, 405 - Second arc surface;

[0034] 501-Rotating wheel, 502-Handle, 503-First connecting unit, 504-Second connecting unit, 505-Coupling, 506-Pencil rod, 507-First connecting rod, 508-First collar, 509-First rotating block, 510-Second rotating block, 511-Second collar, 512-Second connecting rod, 513-Main body, 514-Reference surface, 515-Protrusion. Detailed Implementation

[0035] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0036] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0037] In the description of this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0038] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0039] Figure 1 The illustration shows a workpiece 100 assembled with a nut 101 in one embodiment of the present invention. The workpiece 100 is an electronic pen. Figure 2 It shows Figure 1 The electronic pen tip includes a threaded rod 103, with two nuts 101 fitted onto the outside of the threaded rod 103 and threadedly connected to it. The nuts 101 are annular, and one end face of each nut 101 has multiple connecting grooves 102. In other embodiments, the workpiece 100 may also be other products requiring assembly with the nuts.

[0040] Figure 3 A nut-tightening device 200 according to a first embodiment of the present invention is shown. The nut-tightening device 200 includes a base 201, a first mounting base 204, a second mounting base 205, and a rotating mechanism 210. For example... Figure 3 As shown, the base 201 includes a base plate 202 and a lifting block 203, which is fixed to the top of the base plate 202 by screws. A first mounting seat 204 is mounted on the top of the lifting block 203, and the lifting block 203 is mainly used to adapt the positions of the first mounting seat 204 and the second mounting seat 205. Figure 4 It shows Figure 3 The first mounting bracket 204 in the middle, Figure 7 for Figure 4 A cross-sectional view of the first mounting bracket 204. (See attached image.) Figure 4 and Figure 7 As shown, the first mounting base 204 is provided with a first receiving cavity 303, which is used to receive the workpiece 100. Figure 5 The image shows the state after the workpiece 100 is mounted on the first mounting base 204. Figure 4 In this design, two first receiving cavities 303 are provided, each for accommodating one workpiece 100. The end (right end) of the first receiving cavity 303 facing the second mounting base 205 is open, so that the portion of the workpiece 100 requiring the assembly of the nut 101 is exposed. Figure 10As shown, the second mounting base 205 has a second receiving cavity 403 for receiving the nut 101. The end of the second receiving cavity 403 facing the first mounting base 204 (left end) is open so that the workpiece 100 can pass through the nut 101. A portion of the rotating mechanism 210 is located in the second receiving cavity 403 and is used to fix it to the nut 101. The rotating mechanism 210 is used to drive the nut 101 to rotate relative to the second mounting base 205 about the second axis 404. The specific structure of the rotating mechanism 210 will be described below.

[0041] The first receiving cavity 303 has a first axis 304, and the second receiving cavity 403 has a second axis 404. Each second receiving cavity 403 is correspondingly arranged with one first receiving cavity 303. For a pair of corresponding first receiving cavities 303 and 403, the first axis 304 and the second axis 404 coincide. The second mounting base 205 can move relative to the base 201 along the second axis 404, thereby changing the distance between the first receiving cavity 303 and the second receiving cavity 403. In this embodiment, the rearmost first receiving cavity 303 is correspondingly arranged with a unique second receiving cavity 403.

[0042] Please combine Figure 4 and Figure 7 The wall of the first receiving cavity 303 includes a first arcuate surface 306 for abutting against the outer peripheral surface of the workpiece 100. The first arcuate surface 306 is a concave arcuate surface, and the first arcuate surface 306 is arranged facing upwards. The first axis 304 satisfies the condition that for any two points on the first arcuate surface 306, the distance between these two points and the first axis 304 is the same. The first axis 304 is also the central axis of the circle corresponding to the first arcuate surface 306. After the workpiece 100 is placed into the first receiving cavity 303, the central axis of the workpiece 100 (i.e., the central axis of the threaded rod 103) coincides with the first axis 304.

[0043] Similarly, such as Figure 10 As shown, the wall of the second receiving cavity 403 includes a second arcuate surface 405, which abuts against the outer circumferential surface of the nut 101. The second arcuate surface 405 is a concave arcuate surface, and it is positioned upwards. The second axis 404 satisfies the following condition: for any two points on the second arcuate surface 405, the distance between these two points and the second axis 404 is the same. After the nut 101 is placed into the second receiving cavity 403, the central axis of the nut 101 coincides with the second axis 404.

[0044] Since the first axis 304 and the second axis 404 coincide with each other, after the nut 101 is placed into the second receiving cavity 403 and the workpiece 100 is placed into the first receiving cavity 303, the central axis of the workpiece 100 will coincide with the central axis of the nut 101, and the workpiece 100 will be aligned with the nut 101.

[0045] The nut tightening device 200 is used as follows: The user places the workpiece 100 into the first receiving cavity 303 and the nut 101 into the corresponding second receiving cavity 403; then, the user pushes or pulls the second mounting seat 205, bringing it closer to the first mounting seat 204, thereby inserting the threaded rod 103 of the workpiece 100 into the second receiving cavity 403, and thus placing the nut 101 on the outside of the threaded rod 103; next, the user can operate the rotating mechanism 210 to rotate the nut 101. While the rotating mechanism 210 drives the nut 101 to rotate, the user can slowly push the second mounting seat 205 towards the first mounting seat 204, thereby gradually tightening the nut 101.

[0046] The nut tightening device 200 of the present invention can align the workpiece 100 and the nut 101 that need to be assembled together. Since the second mounting base 205 moves along the second axis 404 and approaches the first mounting base 204, the workpiece 100 and the nut 101 remain aligned as they begin to approach each other and eventually engage. Therefore, the nut tightening device 200 can reduce the risk of the nut 101 being misaligned relative to the workpiece 100, thereby reducing the risk of incorrect assembly of the nut 101.

[0047] The nut tightening device 200 of the first embodiment will be further described below.

[0048] like Figure 4 As shown, the first mounting base 204 includes a first plate 301 and a second plate 302. The first plate 301 is slidably mounted on the raising block 203 and has a groove. The wall of the groove includes the first arc surface 306 described above. The second plate 302 is movably connected to the top of the first plate 301. The second plate 302 covers a portion of the groove, and the second plate 302 and the first plate 301 together enclose the first receiving cavity 303. Please refer to... Figure 4 and Figure 6 The first plate 301 is rotatable relative to the second plate 302. When the workpiece 100 needs to be removed, the user can flip the first plate 301 upwards. The device also includes a latch 212. When the first plate 301 covers the groove, the latch 212 engages with the first plate 301, thereby preventing the first plate 301 and the second plate 302 from separating, and thus preventing the workpiece 100 from falling off the first mounting base 204. The mobility of the second plate 302 improves the ease of operation for the user to place the workpiece 100 into the first receiving cavity 303, and also improves the ease of operation for removing the workpiece 100 from the first receiving cavity 303.

[0049] like Figure 7As shown, the second plate 302 includes a limiting plane 305, which also serves as part of the wall of the first receiving cavity 303. The limiting plane 305 faces downwards and is positioned opposite to the first arcuate surface 306, together surrounding the workpiece 100. The limiting plane 305 abuts against one of the planes of the outer surface of the workpiece 100, thereby preventing the workpiece 100 from rotating relative to the first mounting base 204 around the first axis 304. Because the limiting plane 305 can prevent the workpiece 100 from rotating, when the nut 101 is driven by the rotating mechanism 210, the workpiece 100 will not rotate with the nut 101, and the nut 101 can be effectively tightened onto the workpiece 100.

[0050] like Figure 7 As shown, the nut tightening device 200 also includes a first slide rail 215 and a first slider 216, with the first slider 216 slidably mounted on the first slide rail 215. The first slide rail 215 is fixed to the top of the lifting block 203 of the base 201, and the extending direction of the first slide rail 215 is the same as the extending direction of the first axis 304 (both are left-right directions). The first slider 216 is fixed to the bottom surface of the first plate 301. In this way, the first mounting base 204 can move relative to the base 201 along the extending direction of the first axis 304, and the position of the first mounting base 204 relative to the base 201 can be adjusted. This facilitates the user in adjusting the first mounting base 204 and the workpiece 100 mounted in the first mounting base 204 to a suitable position for tightening the nut 101.

[0051] like Figure 6 As shown, the nut tightening device 200 also includes a fixing block 213, an adjusting member 211, and a third elastic member 214. The fixing block 213 is fixed to the top of the raising block 203 by screws. The adjusting member 211 passes through the fixing block 213, and its two ends are an adjusting end and an abutting end, which are located on different sides of the fixing block 213. Figures 4 to 7 In this design, the left end of the adjusting member is the adjusting end, and the right end is the abutting end. The adjusting member 211 has external threads, and the fixing block 213 has internal threads; the adjusting member 211 and the fixing block 213 are threadedly connected. The abutting end abuts against the first mounting base 204. More specifically, Figure 6In the middle, the abutting end abuts against the first plate 301. The two ends of the third elastic element 214 are respectively connected to the fixing block 213 and the first mounting base 204. The elastic force of the third elastic element 214 is used to make the abutting end and the first mounting base 204 abut against each other. Specifically, the third elastic element 214 can be set as a tension spring, and the third elastic element 214 is always in a stretched state; one end of the third elastic element 214 hooks onto the screw fixed to the side of the fixing block 213, thereby realizing the connection between the third elastic element 214 and the fixing block 213; the other end of the third elastic element 214 hooks onto the screw fixed to the bottom of the first plate 301, thereby realizing the connection between the third elastic element 214 and the first mounting base 204. Figure 6 As shown, the force applied to the first mounting base 204 by the abutting end is to the right, and the tension applied to the first mounting base 204 by the elastic element is to the left. These two forces are balanced, allowing the first mounting base 204 to be fixed on the first slide rail 215. When the user needs to adjust the position of the first mounting base 204, the user can turn the adjusting member 211 to change the distance between the abutting end and the fixing block 213, thereby moving the first mounting base 204.

[0052] like Figure 9 As shown, the nut tightening device 200 also includes a second slide rail 217 and a second slider 218, the second slider 218 being slidably mounted on the second slide rail 217. The second slide rail 217 is fixed to the base 201, and the second slider 218 is fixed to the bottom of the second mounting base 205. The extending direction of the second slide rail 217 is the same as the extending direction of the second axis 404 (both are left-right directions).

[0053] like Figure 9 and Figure 10 As shown, the second mounting base 205 also has a storage channel 402. The height of the storage channel 402 is not less than the outer diameter of a single nut 101. The storage channel 402 is used to store at least one nut 101. The top end of the storage channel 402 is located on the outer surface of the second mounting base 205, thereby forming an inlet 401. The length of the inlet 401 (the dimension of the inlet 401 in the front-to-back direction) is greater than the outer diameter of the nut 101, and the width of the inlet 401 (the dimension of the inlet 401 in the left-to-right direction) is greater than the axial length of the nut 101. The inlet 401 allows the nut 101 to enter the storage channel 402. The bottom end of the storage channel 402 communicates with the second receiving cavity 403.

[0054] After the nut 101 is tightened onto the workpiece 100, the user can push or pull the second mounting base 205 to move the first mounting base 204 and the second mounting base 205 away from each other. As the first mounting base 204 and the second mounting base 205 move further apart, the nut 101 tightened onto the workpiece 100 also gradually leaves the second receiving cavity 403. Once the nut 101 leaves the second receiving cavity 403, the nut 101 at the bottom of the storage channel 402 is no longer obstructed and falls into the second receiving cavity 403 under its own weight.

[0055] The user can feed at least two nuts 101 into the inlet at a time. After one nut 101 is tightened onto the workpiece 100, the next nut 101 will automatically fall into the second receiving cavity 403. Therefore, the user does not need to reload the nut 101 after each tightening, and the storage channel 402 helps to reduce the number of times the nut 101 needs to be reloaded, thereby improving production efficiency.

[0056] like Figure 9 As shown, in the first embodiment, the rotating mechanism 210 includes a wrench bar 506, a rotating wheel 501, and a handle 502. One end of the wrench bar 506 is located in the second receiving cavity 403 and is used to connect to the nut 101. The rotating wheel 501 is fixed relative to the wrench bar 506, and the rotating wheel 501 and the wrench bar 506 can rotate synchronously relative to the second mounting base 205. The rotation axis of the rotating wheel 501 and the rotation axis of the wrench bar 506 both coincide with the second axis 404. The handle 502 is connected to the rotating wheel 501, and the handle 502 is spaced apart from the second axis 404 in the radial direction of the rotating wheel 501. The user can hold the handle 502 and then rotate the rotating wheel 501, thereby rotating the nut 101. Because the handle 502 is spaced apart from the second axis 404, the force applied by the user to the handle 502 can effectively form a torque that can drive the rotating wheel 501 to rotate, making it easier for the user to rotate the rotating wheel 501. In this embodiment, the nut 101 is actually turned manually, and the rotating mechanism 210 in this embodiment has a low cost.

[0057] In order for the screwdriver 506 to be turned as Figure 2 The structure of the nut 101 and the screwdriver 506 shown is as follows: Figure 11 As shown, the wrench bar 506 includes a main body 513 and protrusions 515. The main body 513 is cylindrical, and one end face of the main body 513 is a reference surface 514. Multiple protrusions 515 are provided, connected to and protruding relative to the reference surface 514, and are spaced apart circumferentially along the main body 513. The protrusions 515 are disposed in the second receiving cavity 403.

[0058] like Figure 9As shown, the rotating mechanism 210 includes a coupling 505, through which the rotating wheel 501 and the screwdriver bar 506 are connected. The coupling 505 includes a first connecting unit 503 and a second connecting unit 504 connected to each other. The first connecting unit 503 is fixedly connected to the screwdriver bar 506, and the second connecting unit 504 is fixedly connected to the rotating wheel 501. The first connecting unit 503 includes a first connecting rod 507, a first collar 508, and a first rotating block 509. The first connecting rod 507 and the screwdriver bar 506 are fixed to each other and can rotate synchronously. The first connecting rod 507 and the screwdriver bar 506 can be fixed by a pin, or by a key connection. The first collar 508 and the first rotating block 509 are both sleeved on the outside of the first connecting rod 507. The first collar 508 and the first rotating block 509 are fixed together by screws, and the first rotating block 509 is also fixed to the first connecting rod 507. The second connecting unit 504 includes a second connecting rod 512, a second collar 511, and a second rotating block 510. The second connecting rod 512 is inserted into the rotating wheel 501, and the second connecting rod 512 and the rotating wheel 501 are fixed together and can rotate synchronously. The second collar 511 and the second rotating block 510 are both sleeved on the outside of the second connecting rod 512, and the second collar 511 and the second rotating block 510 are both fixed to the second connecting rod 512. The second rotating block 510 abuts against and is fixed to the first rotating block 509.

[0059] In this embodiment, the first connecting unit 503 and the second connecting unit 504 are magnetically connected to each other. For example, both the first rotating block 509 and the second rotating block 510 are magnets; or, one of the first rotating block 509 and the second rotating block 510 is a magnet, and the other is made of iron; or, the first rotating block 509 and the second rotating block 510 themselves are not magnetic, and each of the first rotating block 509 and the second rotating block 510 is equipped with a magnet. In some other embodiments not shown, the first rotating block 509 and the second rotating block 510 can also be fixed by screws. Relatively speaking, the advantage of the first connecting unit 503 and the second connecting unit 504 being magnetically connected to each other is that it can reduce the risk of damaging the workpiece 100 by overtightening the nut 101.

[0060] With nut 101 not tightened, coupling 505 is in the first state, the first connecting unit 503 and the second connecting unit 504 are fixed to each other, and the rotating wheel 501 and the wrench bar 506 can rotate synchronously. Since the first connecting unit 503 and the second connecting unit 504 are magnetically connected, the magnetic force and static friction between them are used to fix them to each other.

[0061] With nut 101 already tightened (reaching the preset tightening level), the wrench bar 506 and the first connecting unit 503 are fixed relative to the workpiece 100. If the user continues to rotate the wheel 501 in the direction that allows tightening nut 101, the magnetic force and static friction between the first rotating block 509 and the second rotating block 510 are insufficient to fix them together. At this point, coupling 505 is in the second state, and the second connecting unit 504 rotates relative to the first connecting unit 503. The first connecting unit 503 and the wrench bar 506 will not cause nut 101 to rotate relative to the workpiece 100, and nut 101 will not be further tightened. It should be noted that regardless of whether coupling 505 is in the first or second state, the first rotating block 509 and the second rotating block 510 are in contact with each other under magnetic force.

[0062] like Figure 9 As shown, the coupling 505 also includes a first elastic element 219, with both ends of the first elastic element 219 connected to the first connecting unit 503 and the second mounting base 205, respectively. More specifically, one end of the first elastic element 219 abuts against the second mounting base 205, and the other end of the first elastic element 219 abuts against the first collar 508, with the first elastic element 219 in a compressed state. The elastic force of the first elastic element 219 is used to keep the first connecting unit 503 and the second connecting unit 504 in contact.

[0063] like Figure 9 As shown, the coupling 505 also includes a second elastic element 220. The two ends of the second elastic element 220 are connected to the second connecting unit 504 and the rotating wheel 501, respectively. The elastic force of the second elastic element 220 is used to keep the first connecting unit 503 and the second connecting unit 504 in contact. The nut tightening device 200 also includes a bushing 221. The left end face of the bushing 221 abuts against the second connecting rod 512, the right end face of the bushing 221 abuts against the left end of the second elastic element 220, and the right end of the second elastic element 220 abuts against the rotating wheel 501. The second elastic element 220 is also in a compressed state.

[0064] Under the elastic force of the first elastic element 219 and the second elastic element 220, the first rotating block 509 and the second rotating block 510 are pressed together to reduce the gap between them, thereby improving the stability of the magnetic connection between them. It should be noted that, in order to ensure the first rotating block 509 and the second rotating block 510 are pressed together, in some embodiments, the nut tightening device 200 may only have the first elastic element 219 or only the second elastic element 220.

[0065] like Figure 3As shown, the nut tightening device 200 also includes a camera 206 and a display screen 207. The camera 206 is located above the end of the first mounting base 204 near the second mounting base 205, with its lens facing downwards. The camera 206 is used to capture images of the portion of the workpiece 100 exposed outside the first mounting base 204. The display screen 207 is connected to the camera 206 via wired or wireless means and is used to display the images captured by the camera 206. The nut tightening device also includes a vertical rod 208 and a horizontal rod 209. The vertical rod 208 is vertically arranged, with its bottom end fixed to the base plate 202, and the display screen 207 is mounted on the vertical rod 208. The horizontal rod 209 is connected to the vertical rod 208 and is horizontally arranged, with the camera 206 mounted on the end of the horizontal rod 209 away from the vertical rod 208. Thus, the display screen 207 is located on the side of the first mounting base 204 and the second mounting base 205, allowing the user to view the images.

[0066] The size of the object displayed on the display screen 207 can be larger than the actual size of the object; that is, the image displayed on the display screen 207 is a magnified image of the workpiece 100 and the nut 101. The display screen 207 allows the user to see the position of the threaded rod 103 of the workpiece 100 and the position of the nut 101, thus facilitating the user's judgment on whether the nut 101 has been tightened to the appropriate position. For example, after the user uses the rotating mechanism 210 to tighten the two nuts 101 onto the workpiece 100, the user can judge whether the gap between the two nuts 101 is appropriate by looking at the image, thereby judging whether the position of the nuts 101 is appropriate. If the gap between the two nuts 101 is too small, the user can hold the handle 502 of the rotating mechanism 210 and rotate the entire rotating mechanism 210 in the opposite direction; while the rotating mechanism 210 rotates in the opposite direction, the user gradually pushes the second mounting base 205 away from the first mounting base 204, thereby gradually loosening the second nut 101 and increasing the gap between the first nut 101 and the second nut 101. In this designation, the first nut 101 refers to the nut 101 that is first screwed onto the workpiece 100, and the second nut 101 refers to the nut 101 that is last screwed onto the workpiece 100. When tightening the nuts 101, the rotation direction of the rotating mechanism 210 is "forward." Similarly, if the gap between the two nuts 101 is too large, the user can rotate the rotating mechanism 210 forward and, while rotating the mechanism 210 forward, gradually push the second mounting base 205 towards the first mounting base 204, thereby gradually tightening the second nut 101 and reducing the gap between the two nuts 101. While the user is tightening the second nut 101, the user can continuously observe the display screen 207. When the gap between the two nuts 101 reaches the desired size, the user stops driving the rotating mechanism 210 and the second mounting base 205.

[0067] Since the image displayed on the screen 207 is an enlarged image of the workpiece 100 and the nut 101, the gap between the two nuts 101 is also enlarged in the image displayed on the screen 207. The enlarged gap is easier for the user to observe, thus making it easier for the user to adjust the position of the nut 101 according to the gap, which in turn helps to improve the assembly accuracy and assembly qualification rate of the nut 101.

[0068] like Figure 12 As shown, in another embodiment, the rotating mechanism 210 can also be configured as an electric screwdriver. This eliminates the need for the user to manually tighten the nut 101, making the operation of tightening the nut 101 onto the workpiece 100 less strenuous and more efficient. Furthermore, in another embodiment not shown, the rotating mechanism 210 can also be configured as a pneumatic screwdriver. The shape of the screwdriver bar 506 can be configured as follows: Figure 11 The shape shown.

[0069] In the description of this invention, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A nut-tightening device, characterized in that, include: Base; A first mounting base is mounted on the base. The first mounting base has at least one first receiving cavity for accommodating a workpiece. The wall surface of the first receiving cavity includes a first arc surface. The first arc surface is used to abut against the outer peripheral surface of the workpiece. The first receiving cavity has a first axis. Any two points on the first arc surface are equidistant from the first axis. A second mounting base is mounted on the base. The second mounting base has a second receiving cavity for accommodating a nut. The wall surface of the second receiving cavity includes a second arc surface, which is used to abut against the outer peripheral surface of the nut. The second receiving cavity has a second axis, and any two points on the second arc surface are equidistant from the second axis. A rotating mechanism, a portion of which is located in the second receiving cavity and used to fix it to the nut, is used to drive the nut to rotate about the second axis. The rotating mechanism includes a screwdriver rod, a rotating wheel, a coupling, and a handle. One end of the screwdriver rod is located in the second receiving cavity and used to connect to the nut. The coupling includes a first connecting unit and a second connecting unit magnetically connected to each other. The first connecting unit is fixedly connected to the screwdriver rod, and the second connecting unit is fixedly connected to the rotating wheel. The rotation axis of both the rotating wheel and the rotation axis of the screwdriver rod coincide with the second axis. The handle is connected to the rotating wheel. In the radial direction of the rotating wheel, the handle is spaced apart from the second axis; when the nut is not tightened, the first connecting unit and the second connecting unit are fixed to each other; when the nut is tightened, the second connecting unit can rotate relative to the first connecting unit; the wrench bar includes a main body and a plurality of protrusions, the main body is cylindrical, one end of the main body is located in the second receiving cavity, the end face of the main body located in the second receiving cavity is a reference surface, the plurality of protrusions are connected to the reference surface and protrude relative to the reference surface, and the plurality of protrusions are distributed circumferentially at intervals along the main body; Each second receiving cavity is provided in correspondence with one first receiving cavity. For a corresponding second receiving cavity and a first receiving cavity: the first axis and the second axis coincide. At least one of the second mounting base and the first mounting base can move relative to the base along the second axis to change the distance between the first receiving cavity and the second receiving cavity. The end of the first receiving cavity facing the second mounting base and the end of the second receiving cavity facing the first mounting base are both open.

2. The nut tightening device according to claim 1, characterized in that, The coupling further includes a first elastic element, one end of which is connected to the first connecting unit, and the other end of which is connected to the second mounting base. The elastic force of the first elastic element is used to keep the first connecting unit and the second connecting unit in contact. And / or, The coupling further includes a second elastic element, one end of which is connected to the second connecting unit, and the other end of which is connected to the rotating wheel. The elastic force of the second elastic element is used to keep the first connecting unit and the second connecting unit in contact.

3. The nut tightening device according to claim 1, characterized in that, The first mounting base includes: A first plate is connected to the base, and the first plate has a groove, the wall of which includes the first arc surface; A second plate is movably connected to the first plate, and the second plate covers a portion of the groove so that the first plate and the second plate together define the first receiving cavity.

4. The nut-tightening device according to claim 1, characterized in that, The wall of the first receiving cavity includes a limiting plane, which is located on the second plate and is disposed opposite to the first arc surface. The limiting plane and the first arc surface together surround the workpiece.

5. The nut tightening device according to claim 1, characterized in that, The first mounting base is movable relative to the base along the extension direction of the first axis, and the nut tightening device further includes: The fixing block is fixedly connected to the base; An adjusting member passes through the fixed block and is threadedly connected to the base. The adjusting member includes an abutting end that abuts against the first mounting base. The adjusting member is rotatable relative to the fixed block to change the distance between the abutting end and the fixed block. The rotation axis of the adjusting member is parallel to or coincides with the first axis. The third elastic element has two ends connected to the fixed block and the first mounting base, respectively. The elastic force of the third elastic element is used to keep the abutting end in contact with the first mounting base.

6. The nut-tightening device according to claim 1, characterized in that, The second mounting base is provided with a storage channel for storing at least one of the nuts. The top end of the storage channel is disposed on the outer surface of the second mounting base to form an inlet for the nut to enter the storage channel. The bottom end of the storage channel communicates with the second receiving cavity.

7. The nut-tightening device according to any one of claims 1 to 6, characterized in that, The nut tightening device also includes: A camera is located above one end of the first mounting base near the second mounting base, with the camera facing downwards; A display screen is communicatively connected to the camera, and the display screen is used to display images captured by the camera.

Images