Bolt tightening mechanism

Abstract

The utility model relates to the technical field of bolt tightening equipment, in particular to a bolt tightening mechanism. The mechanism comprises a driving mechanism, a rotating part, a protective sleeve and an assembling auxiliary part, wherein the driving mechanism consists of a motor and a rotating shaft; one end of the rotating piece is fixed with the rotating shaft, and the other end is provided with a limiting hole matched with the bolt; the protective sleeve surrounds the rotating piece and the rotating shaft and is detachably connected with the driving mechanism. The rotating part further comprises an outer sleeve, a guide plate and a clamping assembly, flexible adjustment of the clamping assembly is achieved through a guide through groove and an elastic part, the rotating part can be matched with various special-shaped bolt heads, the assembling auxiliary part comprises an auxiliary part body and a shaft hole, the far end of the shaft hole can contain a nut and can be matched with a bolt, and the bolt can be driven to rotate when the motor is started. And the bolt is screwed on the nut. The bolt tightening device achieves the technical effects of improving the bolt tightening efficiency and adapting to various bolt heads.

Description

Technical Field

[0001] The present application relates to the technical field of bolt tightening equipment, and in particular to a bolt tightening mechanism. Background Art

[0002] During the factory production process, there is often a need to tighten long bolts. The traditional bolt tightening method mainly relies on manual operation, which is inefficient. The development of automation technology has greatly improved production efficiency and product quality, especially in high-precision, large-scale production scenarios. Automated bolt tightening mechanisms have become indispensable key equipment.

[0003] In actual production, bolt heads often have irregular shapes, requiring the use of tools such as wrenches to rotate them. Existing bolt tightening mechanisms are poorly adaptable to these bolts. Because bolt shapes and sizes vary across products, existing fixing fixtures or single position-limiting structures struggle to meet diverse production needs. Utility Model Content

[0004] The purpose of this application is to overcome the above technical problems and provide a bolt tightening mechanism.

[0005] A bolt tightening mechanism, comprising:

[0006] The driving mechanism comprises a motor and a rotating shaft, wherein the output shaft of the motor is coaxially fixed with the rotating shaft;

[0007] A rotating member, one end of which is coaxially connected to the rotating shaft and the other end of which is provided with a limiting hole;

[0008] a protective sleeve, which covers the rotating part and exposes the limiting hole; and

[0009] The assembly auxiliary part includes an auxiliary part body and an axial hole opened at the axis center of the assembly auxiliary part. The distal end of the axial hole can accommodate a nut. The axial hole can cooperate with a bolt, and the bolt can extend outside the axial hole and connect with the limiting hole. When the motor is started, it can drive the bolt to rotate to screw the bolt onto the nut.

[0010] By adopting the above solution, the driving mechanism drives the rotating member to rotate, and the head of the bolt is placed in the limiting hole. The limiting hole drives the bolt to rotate, so that the bolt is tightened.

[0011] In one embodiment, the rotating member is detachably fixed to the rotating shaft (12).

[0012] By adopting the above solution, the rotating shaft can be equipped with rotating parts of different models to adapt to bolts of different models.

[0013] In one embodiment, the rotating member includes a sleeve, a guide plate and a clamping assembly, the sleeve includes a rotating part and a limiting part, the rotating part is fixed to the rotating shaft, the guide plate and the clamping assembly are both located at the limiting part, the guide plate is provided with a guide groove and the edge cooperates with the inner wall of the sleeve, and the clamping assembly can move in the guide groove.

[0014] By adopting the above solution, the clamping block moves in the guide groove, so that the shape of the limiting hole can be changed, thereby adapting to more types of bolts.

[0015] In one embodiment, the clamping assembly includes a connecting rod, a sliding rod and a clamping block. The connecting rod is perpendicular to the sliding rod and has a slider at one end. The slider is sleeved on the sliding rod. The other end of the connecting rod is rotatably connected to the clamping block.

[0016] By adopting the above solution, the sliding rod and the connecting rod limit the position of the clamping block, so that the clamping block will not rotate along the guide slot and can only move along the guide slot.

[0017] In one embodiment, the sliding rods are arranged in a radial shape and extend toward the inner wall of the outer sleeve in a circular array with the central axis of the outer sleeve as the center, and the extended ends of the sliding rods are fixed perpendicularly to the inner wall of the outer sleeve.

[0018] By adopting the above solution, the slide bar and the outer sleeve are fixed, and the rotation of the outer sleeve can drive the rotation of the slide bar.

[0019] In one embodiment, the cross section of the sliding rod is polygonal.

[0020] By adopting the above solution, the connecting rod is prevented from rotating around the sliding rod, so that the sliding rod can rotate with the connecting rod and the clamping block relative to the guide plate.

[0021] In one embodiment, an elastic member is sleeved on the surface of the sliding rod, and when the elastic member is in a natural state, the connecting rod and the clamping block are close to the extended end of the sliding rod.

[0022] By adopting the above solution, damping is generated when the guide plate and the slide rod rotate relative to each other, thereby achieving precise control.

[0023] In one embodiment, the guide groove is arc-shaped and extends toward the center of the guide plate.

[0024] By adopting the above solution, the moving direction of the clamping block extends toward the inside of the guide plate.

[0025] In one embodiment, the cross section of the clamping block is arc-shaped and cooperates with the guiding groove.

[0026] By adopting the above solution, the cross section of the clamping block is set to be arc-shaped, so that the clamping block can move along the guide groove. At the same time, the clamping block can be accommodated in the guide groove, saving the internal space of the outer sleeve.

[0027] In one embodiment, a handle is provided at the edge of the guide plate, and a limiting groove is provided on the outer sleeve to cooperate with the handle. The handle and the outer sleeve can be tightened and fixed by a fixing piece.

[0028] By adopting the above solution, the guide plate can be placed inside the outer sleeve by pushing the handle, so that the outer sleeve and the guide plate can rotate relative to each other.

[0029] In summary, this application includes at least one of the following beneficial technical effects:

[0030] 1. By setting a limiting hole that can cooperate with the bolt head at one end of the rotating part, and fixing the other end to the rotating shaft of the driving mechanism, the rotating shaft can drive the rotating part to rotate, and the limiting hole of the rotating part cooperates with the bolt head, thereby driving the bolt to rotate, and thus screwing the bolt onto the nut.

[0031] 2. By arranging a guide plate and a clamping assembly inside the outer sleeve of the rotating part, and arranging a guide groove extending into the interior of the guide plate on the guide plate, the clamping assembly can move along the guide plate, thereby changing the internal shape of the limiting hole, and the limiting hole can adapt to bolts of different sizes.

[0032] 3. By rotating one end of the connecting rod to the clamping block and slidingly connecting the other end to a sliding rod with a polygonal cross-section, the sliding rod is fixed to the outer sleeve, thereby limiting the clamping block in the direction of movement of the guide plate, so that the slider can only move along the wire slot hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic structural diagram of a bolt tightening mechanism provided in the first embodiment of the present application.

[0034] Figure 2 This is an exploded view of a bolt tightening mechanism provided in the first embodiment of the present application.

[0035] Figure 3 It is a structural schematic diagram of the rotating part of the second embodiment of the present application.

[0036] Figure 4 It is an exploded view of the rotating part of the second embodiment of the present application.

[0037] Figure 5 It is a cross-sectional view of the rotating member of the second embodiment of the present application.

[0038] Figure 6 It is a structural schematic diagram of the guide plate of the second embodiment of the present application.

[0039] Explanation of the accompanying drawings: 1. Driving mechanism; 11. Motor; 12. Rotating shaft; 2. Rotating part; 21. Limiting hole; 22. Outer sleeve; 221. Rotating part; 222. Limiting part; 223. Limiting slot; 23. Guide plate; 231. Guide slot; 232. Handle; 2321. Fixing part; 24. Clamping assembly; 241. Connecting rod; 2411. Slider; 242. Sliding rod; 2421. Elastic part; 243. Clamping block; 3. Protective sleeve; 31. Twisting part; 4. Assembly auxiliary part; 41. Auxiliary part body; 5. Bolt; 6. Nut. DETAILED DESCRIPTION

[0040] Therefore, it is necessary to provide a bolt tightening mechanism that can adapt to a variety of bolts.

[0041] See also Figure 1-2 , Figure 1 A bolt tightening mechanism provided in the first embodiment of the present application includes: a driving mechanism 1, a rotating part 2 and a protective sleeve 3.

[0042] The drive mechanism 1 includes a motor 11 and a rotating shaft 12. The motor 11 can be a DC motor 11 or an AC motor 11, which has a high torque output capacity. The rotating shaft 12 is connected to the output shaft of the motor 11 and can be fixed by a coupling or a direct connection to ensure the reliability of power transmission.

[0043] Pin holes are provided on the rotating part 2 and the rotating shaft 12, and the connection between the rotating part 2 and the rotating shaft 12 is achieved by assembling the pin holes. A limiting hole 21 is provided on the end of the rotating part 2 facing away from the rotating shaft 12, and an edge is provided inside the limiting hole 21. When the rotating shaft 12 drives the rotating part 2 to rotate, the edge inside the limiting hole 21 can cooperate with the edge of the bolt 5, thereby driving the bolt 5 to rotate. The assembly auxiliary part 4 includes an auxiliary part body 41 and an axial hole 42 opened at the axis of the auxiliary part. The far end of the axial hole 42 is provided with a receiving groove to accommodate the nut 6. The nut 6 is clamped in the receiving groove and fixed to the assembly auxiliary part 4. The nut 6 can also be fixed to the assembly auxiliary part 4 by bonding, and the thread of the bolt 5 cooperates with the nut 6.

[0044] During use, the bolt 5 is inserted into the shaft hole 42 and moved to the distal end of the shaft hole 42, where it engages with the internal thread of the shaft hole 42. The side edges of the internal limiting hole 21 engage with the head of the bolt 5. The motor is activated to drive the bolt 5 to rotate, and the bolt 5 is screwed onto the bolt 5 by rotation. The diameter and depth of the limiting hole 21 can be adjusted according to the specific application scenario to accommodate bolts 5 of different sizes. The inner wall of the limiting hole 21 can be machined into a rough surface to increase friction with the head of the bolt 5 and prevent slipping. During use, bolts 5 of different sizes can be replaced according to actual needs to connect to the rotating shaft 12 to accommodate bolts 5 of different shapes.

[0045] The protective sleeve 3 has a double-layer structure and is fixed to the side where the output shaft of the motor 11 is located. The outer protective sleeve 3 is provided with a threaded hole. A screwing member 31 is used to pass through the threaded hole and abut against the inner protective sleeve 3. The screwing member 31 is threaded. Tightening the screwing member 31 into the threaded hole can increase the pressure between the inner and outer protective sleeves 3, thereby achieving fixation between the inner and outer protective sleeves 3. The protective sleeve 3 surrounds the rotating member 2 and the rotating shaft 12 to prevent the rotating member 2 and the rotating shaft 12 from scratching the user during rotation.

[0046] During actual use, the rotating part 2 adapted to the bolt 5 is fixed to the rotating shaft 12. When replacing the rotating part 2 of a different model, the inner protective sleeve 3 can be moved along the central axis of the protective sleeve 3, and the relative position between the inner protective sleeve 3 and the outer protective sleeve 3 can be controlled to control the surrounding area of ​​the protective sleeve 3 on the rotating part 2. The driving mechanism 1 can be fixed on the workbench. When the bolt tightening mechanism starts working, the rotating shaft 12 drives the rotating part 2. The operator can directly move the head of the bolt 5 to the limiting hole 21 to realize the tightening of the bolt 5, which is suitable for assembly line operations.

[0047] Example 2

[0048] See also Figure 3 , Figure 3 This is a structural diagram of the rotating member of the second embodiment of the present application. The difference between this embodiment and the above embodiments is that, in this embodiment, the rotating member 2 includes a sleeve 22, a guide plate 23 and a clamping assembly 24.

[0049] Please also refer to Figure 4-5 , Figure 4 This is an exploded view of the rotating member of the second embodiment of the present application. The outer sleeve 22 includes a rotating portion 221 and a limiting portion 222. The rotating portion 221 is fixed to the rotating shaft 12 by a pin hole through the assembly pin hole. The limiting portion 222 is the portion where the limiting hole 21 is located. The guide plate 23 and the clamping assembly 24 are both located on the limiting portion 222. The guide plate 23 is circular, and its side surface mates with the inner wall of the outer sleeve 22, allowing it to rotate along the inner wall of the outer sleeve 22. The guide plate 23 is provided with a guide slot 231. The clamping assembly 24 mates with the guide slot 231 and can move within the guide slot 231.

[0050] The clamping assembly 24 includes a connecting rod 241, a sliding rod 242, and a clamping block 243. The connecting rod 241 and the sliding rod 242 are arranged perpendicularly. One end of the connecting rod 241 is provided with a slider 2411, which is mounted on the sliding rod 242 and can drive the connecting rod 241 to slide on the sliding rod 242. The other end of the connecting rod 241 is mounted with a rotating shaft 12, which is fixed to the clamping block 243, allowing the clamping block 243 to rotate about the central axis of the connecting rod 241. The sliding rods 242 are arranged in a radial pattern and extend in a circular array toward the inner wall of the outer shell 22. The extended ends of the sliding rods 242 are fixed perpendicularly to the inner wall of the outer shell 22. The cross-section of the sliding rods 242 is polygonal, which prevents the connecting rod 241 and the slider 2411 from rotating about the sliding rods 242 or the central axis of the outer shell 22.

[0051] Please also refer to Figure 6 , Figure 6 This is a structural schematic diagram of the guide plate of the second embodiment of the present application. The cross-section of the clamping block 243 is arc-shaped and matches the guide groove 231. The guide groove 231 extends toward the interior of the guide plate 23. When the guide plate 23 rotates, the clamping block 243 moves along the extension trajectory of the guide groove 231, thereby changing the internal shape of the limiting hole 21 to achieve the effect of adapting to different types of bolts 5. The surface of the slide rod 242 is covered with an elastic member 2421, which can be a spring. When the elastic member 2421 is in a natural state, the connecting rod 241 and the clamping block 243 are close to the extended end of the slide rod 242. When the guide plate 23 rotates, the clamping block 243 moves toward the inside of the guide plate 23, and the elastic member 2421 is compressed to provide damping for the rotation of the guide plate 23, so that the rotation of the guide groove plate is more precise. The operator can more accurately adjust the inward offset distance of the clamping block 243. A handle 232 is provided on the side of the limiting slot 223, and the outer sleeve 22 is provided with a limiting slot 223 to cooperate with the handle 232. The surface of the handle 232 is provided with an external thread that can be connected to the fixing member 2321, and the guide plate 23 and the outer sleeve 22 can be fixed by tightening the fixing member 2321.

[0052] In actual use, the clamping block 243 is in a fixed state, and the side edges of the clamping block 243 cooperate with the edge of the bolt 5. When the rotating member 2 rotates, the side edges of the clamping block 243 drive the bolt 5 to rotate. When the clamping block 243 moves to a position where the side edge can cooperate with the edge of the bolt 5, the guide plate 23 is fixed by the nut 6. At this time, the internal structure of the rotating part 2 is in a fixed state, and the bolts 5 of other sizes can be driven to rotate.

[0053] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A bolt tightening mechanism, characterized in that: include: A driving mechanism (1) comprises a motor (11) and a rotating shaft (12), wherein the output shaft of the motor (11) is coaxially fixed to the rotating shaft (12); A rotating member (2), one end of the rotating member (2) is coaxially connected to the rotating shaft (12), and the other end is provided with a limiting hole (21); A protective sleeve (3) is sleeved on the rotating part and exposes the limiting hole (21); and An assembly auxiliary component (4) includes an auxiliary component body (41) and an axial hole (42) opened at the axis of the assembly auxiliary component (4). The distal end of the axial hole (42) can accommodate a nut (6). The axial hole (42) can be assembled with a bolt (5), and the bolt (5) can extend outside the axial hole (42) and be connected to the limiting hole (21). When the motor (11) is started, it can drive the bolt (5) to rotate so as to screw the bolt (5) onto the nut (6).

2. A bolt tightening mechanism according to claim 1, characterized in that: The rotating member (2) is detachably fixed to the rotating shaft (12).

3. A bolt tightening mechanism according to claim 2, characterized in that: The rotating member (2) includes a sleeve (22), a guide plate (23) and a clamping assembly (24); the sleeve (22) includes a rotating portion (221) and a limiting portion (222); the rotating portion (221) is fixed to the rotating shaft (12); the guide plate (23) and the clamping assembly (24) are both located in the limiting portion (222); the guide plate (23) is provided with a guide groove (231) and the edge of the guide plate cooperates with the inner wall of the sleeve (22); the clamping assembly (24) can move in the guide groove (231).

4. A bolt tightening mechanism according to claim 3, characterized in that: The clamping assembly (24) includes a connecting rod (241), a sliding rod (242) and a clamping block (243). The connecting rod (241) is perpendicular to the sliding rod (242) and is provided with a slider (2411) at one end. The slider (2411) is sleeved on the sliding rod (242). The other end of the connecting rod (241) is rotatably connected to the clamping block (243).

5. The bolt tightening mechanism according to claim 4, characterized in that: The slide rods (242) are arranged in a radial shape and extend toward the inner wall of the outer sleeve (22) in a circular array with the central axis of the outer sleeve (22) as the center. The extended ends of the slide rods (242) are vertically fixed to the inner wall of the outer sleeve (22).

6. The bolt tightening mechanism according to claim 5, characterized in that: The cross section of the sliding rod (242) is polygonal.

7. The bolt tightening mechanism according to claim 6, characterized in that: An elastic member (2421) is sleeved on the surface of the slide rod (242). When the elastic member (2421) is in a natural state, the connecting rod (241) and the clamping block (243) are close to the extended end of the slide rod (242).

8. The bolt tightening mechanism according to claim 7, characterized in that: The guide groove (231) is arc-shaped and extends toward the center of the guide plate (23).

9. The bolt tightening mechanism according to claim 8, characterized in that: The clamping block (243) has an arc-shaped cross section and cooperates with the guide slot (231).

10. The bolt tightening mechanism according to claim 9, characterized in that: The guide plate (23) is provided with a handle (232) at the edge thereof, and the outer sleeve (22) is provided with a limiting through slot (223) cooperating with the handle (232). The handle (232) and the outer sleeve (22) can be tightened and fixed by a fixing member (2321).

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