A locking mechanism and anti-run-off reel device
By linking the axial drive assembly and the radial locking device, and combining the wedge block and the elastic element, the problem of uneven locking in the reel structure is solved, and the uniform distribution of locking force and stable operation of the equipment are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DONGGUAN LANGSKE INTELLIGENT TECHNOLOGY CO LTD
- Filing Date
- 2025-07-29
- Publication Date
- 2026-06-16
AI Technical Summary
The existing reel structure is prone to uneven locking during long-term use, which leads to unbalanced force on the material tray and affects the material processing accuracy and stability.
It employs an axial drive assembly and a radial locking device. The expansion of the radial locking device is controlled by the axial movement of the movable shaft. Combined with wedge blocks and a limiting structure, it achieves uniform locking force distribution and provides continuous preload through elastic elements.
It improves the stability and reliability of equipment operation, ensures uniform locking force under high-speed operating conditions, avoids loosening and overload, and improves the reliability and stability of locking.
Smart Images
Figure CN224362173U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of roll material processing technology, and in particular to a locking mechanism and an anti-loosening roll device. Background Technology
[0002] In the field of roll material processing, the roll is a key component that ensures the smooth transport of materials. It is fixed by clamping the inner wall of the material tray through an internal expansion mechanism. Traditional rolls are widely used in continuous production lines for films, metal foils, etc., and their performance directly affects production efficiency and product quality.
[0003] Existing expansion shaft structures are prone to uneven locking during long-term use, leading to unbalanced forces on the material tray. Due to wear or aging of the expansion elements, the material tray may tilt after installation, causing material deviation and tension fluctuations during high-speed operation, thus affecting machining accuracy.
[0004] Chinese utility model patent (CN212769142U) discloses an internal expansion type unwinding device, including a frame, a unwinding shaft pivotally connected to the frame, and an expansion assembly located on the unwinding shaft. The expansion assembly includes a fixed sleeve fixed to the inner end of the unwinding shaft, a movable sleeve located at the outer end of the fixed sleeve, a threaded sleeve located outside the fixed sleeve, and a crossbar mechanism evenly distributed around the axis outside the unwinding shaft. The outer end of the unwinding shaft has a threaded portion that mates with the threaded sleeve. Each crossbar mechanism includes a first connecting rod and a second connecting rod pivotally connected in the middle. One end of the first connecting rod is hinged to the fixed sleeve, and the other end is hinged to a support rod. One end of the second connecting rod is hinged to the movable sleeve, and the other end is fixed with a pin. The support rod has an elongated hole for the pin to move. The axis of the support rod and the extension direction of the elongated hole are parallel to the axis of the unwinding shaft. This utility model uses a crossbar mechanism, which can provide a relatively large adjustment range for the outer diameter, but it does not completely solve the defects of uneven locking force distribution and insufficient dynamic compensation capability.
[0005] Therefore, it is necessary to develop a new type of reel structure and locking mechanism that can achieve a more uniform distribution of locking force, effectively suppress the skew of the material tray, and adapt to high-speed operating conditions, thereby improving the stability and reliability of the unwinding process. Utility Model Content
[0006] Based on this, it is necessary to provide a locking mechanism and an anti-loosening reel device to address the above-mentioned technical problems. The locking mechanism is equipped with a radial locking device with uniformly distributed locking force, which effectively prevents the material carrier disc from loosening during operation.
[0007] To address the aforementioned technical problems, the first aspect of this utility model proposes a locking mechanism, comprising: an axial drive assembly and a radial locking device; the radial locking device is hinged to the actuating end of the axial drive assembly; the axial drive assembly includes a drive actuator and a movable shaft, the movable shaft being axially movable, one end of which is connected to the drive actuator, and the other end of which is connected to the radial locking device; when the axial drive assembly drives the movable shaft to move axially, it causes the radial locking device to generate a radial expansion motion, thereby locking the object to be locked.
[0008] Furthermore, the radial locking device includes two symmetrically arranged wedges, which are hinged to each other at the end of the movable shaft via a hinge shaft.
[0009] Furthermore, a limiting structure is provided on the outer side of the hinge end of the radial locking device, which prevents further radial expansion when the wedge block is extended to 30-60°.
[0010] Furthermore, the limiting structure includes trapezoidal bosses on both sides of the hinge end of each wedge block and contact planes arranged alternately with the trapezoidal bosses; the trapezoidal bosses of the two wedge blocks and the contact planes form a mechanical limiting mechanism with surface-to-surface contact.
[0011] Furthermore, the working end of the wedge block is provided with a friction-reducing bearing, which forms rolling contact with the fixed plate.
[0012] Furthermore, a fixed shaft is coaxially arranged inside the movable shaft. The end of the fixed shaft is sequentially connected to a pre-tightening device and a pre-opening structure. The pre-opening structure includes a connecting rod and a top block. One end of the connecting rod is fixedly connected to the pre-tightening device, and the other end is movably connected to the top block.
[0013] Furthermore, the pre-tightening device includes a pre-tightening plunger, a first elastic element, and a second elastic element; the pre-tightening plunger is slidably disposed at the end of the fixed shaft, and its inner end extends to form a convex shaft; the first elastic element is disposed between the pre-tightening plunger and the top block and is coaxially sleeved on the outer periphery of the connecting rod.
[0014] Furthermore, the second elastic element is sleeved on the outer peripheral wall of the fixed shaft; both ends of the second elastic element are respectively constrained by the pre-tightening plunger and the limiting structure of the fixed shaft; when the movable shaft moves axially, the pre-tightening plunger compresses the second elastic element and drives the convex shaft to move inside the fixed shaft.
[0015] Furthermore, the first elastic element and the second elastic element are compression springs.
[0016] The second aspect of this utility model provides an anti-loosening reel device, which includes: a drive assembly, a main shaft, a material carrying plate, and any of the above-mentioned locking mechanisms; the movable shaft is coaxially disposed in the internal cavity of the main shaft, and the two ends of the main shaft are respectively connected to the drive assembly and the material carrying plate; the fixing plate of the locking mechanism is disposed on the side of the material carrying plate and sleeved on the outer wall of the main shaft.
[0017] Compared with the prior art, the present invention has the following beneficial effects:
[0018] The locking mechanism and anti-loosening reel device provided by this utility model significantly improve the stability of equipment operation. The locking mechanism adopts a linkage structure of axial drive and radial locking. The radial expansion of the radial locking device is controlled by the axial displacement of the movable shaft to ensure uniform distribution of locking force and avoid overload or loosening.
[0019] The combination of the elastic element and the arc-shaped top block provides a stable preload, thereby compensating for minor displacements during operation, ensuring locking reliability in long-term use, and maintaining excellent locking stability even under high-speed operating conditions. Attached Figure Description
[0020] Figure 1 A schematic diagram of the anti-loosening roller device provided by this utility model;
[0021] Figure 2 An exploded view of the anti-loosening roller device provided by this utility model;
[0022] Figure 3 A schematic diagram of the internal structure of the movable shaft of the anti-loosening reel device provided for the utility model;
[0023] Figure 4 A schematic diagram of the radial locking device of the anti-loosening reel device provided for the utility model;
[0024] Figure 5 A schematic diagram of the internal structure of the locking mechanism in its initial state, provided for the utility model.
[0025] Figure 6 for Figure 5 Enlarged view of the structure of section A in the middle;
[0026] Figure 7 A schematic diagram of the internal structure of the locking mechanism during the starting phase, provided for the utility model.
[0027] Figure 8 for Figure 7 Enlarged view of the structure of section B;
[0028] Figure 9 A schematic diagram of the internal structure of the locking mechanism in the locked state provided by the utility model;
[0029] Figure 10 for Figure 9 Enlarged view of the structure of section C.
[0030] The markings in the diagram are explained as follows:
[0031] Drive assembly 1, drive motor 11, drive wheel 12, timing belt 13, driven gear 14;
[0032] Spindle 2;
[0033] Material carrying plate 3, belt pressing mechanism 31;
[0034] Movable shaft 4, fixed plate 41, radial locking device 42, anti-friction bearing 421, trapezoidal boss 422, contact plane 423;
[0035] Fixed shaft 5;
[0036] Pre-opening structure 6, connecting rod 61, top block 62;
[0037] Pre-tightening device 7, pre-tightening plunger 71, cam shaft 72, first elastic element 73, second elastic element 74. Detailed Implementation
[0038] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.
[0039] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0040] Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. To enable those skilled in the art to better understand the present utility model, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.
[0041] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.
[0042] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0043] Locking mechanism
[0044] As described in the background section, the existing unwinding shaft fixing structure expansion shaft is prone to uneven locking during long-term use.
[0045] To solve this technical problem, this utility model provides a locking mechanism, please refer to... Figures 3-5 It includes: an axial drive assembly and a radial locking device 42; the radial locking device 42 is hinged to the actuating end of the axial drive assembly; the axial drive assembly includes a drive actuator and a movable shaft 4, the movable shaft 4 is axially movable, one end of which is connected to the drive actuator and the other end is connected to the radial locking device 42; when the axial drive assembly drives the movable shaft 4 to move axially, it causes the radial locking device 42 to generate a radial expansion movement, thereby locking the object to be locked, such as a material carrier plate.
[0046] The locking mechanism provided by this utility model can improve the stability and reliability of equipment operation. The linkage mechanism formed by the movable shaft 4 and the radial locking device 42 controls the radial expansion of the radial locking device 42 through axial displacement, ensuring that the locking force is evenly distributed and avoiding overload or loosening.
[0047] Specifically, such as Figure 4As shown, the radial locking device 42 consists of two symmetrically arranged wedges. One end of each wedge is hinged to the end of the movable shaft 4 via a hinge shaft. A limiting structure is provided on the outer side of the hinge end of the radial locking device 42. When the two wedges are extended to the target angle, the limiting structure prevents the wedges from expanding further radially. When fully limited, the angle of the two wedges is 30 to 60°. In this embodiment, it is preferably 45° to ensure that the axial movement can be effectively converted into radial expansion force to achieve a stable locking effect.
[0048] Furthermore, the limiting structure adopts a bidirectional symmetrical design. Each wedge has a trapezoidal boss 422 and a contact plane 423 on both sides of the hinge end, and the trapezoidal bosses 422 and contact planes 423 of the two wedges are arranged in an alternating manner. When the wedges are extended to the target angle, the trapezoidal boss 422 of one wedge and the contact plane 423 of the other wedge form an intersecting surface abutment, thereby achieving mechanical limiting.
[0049] Furthermore, the working ends of the two inclined wedges of the radial locking device 42 that contact the fixed plate 41 are provided with anti-friction bearings 421, which form rolling contact with the fixed plate 41, making the locking process smoother and avoiding wear caused by hard friction.
[0050] Furthermore, a pressing mechanism 31 that cooperates with the material carrying plate 3 is provided on one side of the material carrying plate 3.
[0051] Furthermore, such as Figures 5-6 As shown, a fixed shaft 5 is coaxially arranged inside the movable shaft 4, and the end of the fixed shaft 5 is sequentially connected to the pre-tightening device 7 and the pre-opening structure 6. Specifically, the pre-opening structure 6 includes a connecting rod 61 and a top block 62, wherein one end of the connecting rod 61 is connected to the pre-tightening device 7, and the other end is provided with the top block 62.
[0052] Furthermore, the connecting rod 61 is fixed inside the pre-tightening device 7, the top block 62 is movably connected to the connecting rod 61, and the top block 62 can slide up and down along the connecting rod 61. Furthermore, the working surface of the top block 62 that contacts the anti-friction bearing 421 is arc-shaped or triangular.
[0053] Furthermore, the pre-tightening device 7 includes a pre-tightening plunger 71, a first elastic element 73, and a second elastic element 74. The pre-tightening plunger 71 is slidably disposed at the end of the fixed shaft 5, with one end extending toward the interior of the fixed shaft 5 to form a convex shaft 72. The peripheral wall of the pre-tightening plunger 71 is fixedly connected to the inner wall of the movable shaft 4. The movable shaft 4 drives the convex shaft 72 of the pre-tightening plunger 71 to move axially and insert into the internal cavity of the fixed shaft 5. The first elastic element 73 is disposed between the pre-tightening plunger 71 and the top block 62 of the pre-opening structure 6 and is coaxially sleeved on the outer periphery of the connecting rod 61. The second elastic element 74 is sleeved on the outer peripheral wall of the fixed shaft 5. The inner diameter of the second elastic element 74 is clearance-fitted with the outer wall of the fixed shaft 5, and its outer diameter maintains an appropriate radial clearance with the inner cavity of the movable shaft 4. The two ends of the second elastic element 74 are respectively inserted between the support seat inside the pre-tightening plunger 71 and the limiting structure formed by the annular stepped surface of the outer wall of the fixed shaft 5. The first elastic element 73 and the second elastic element 74 are preferably compression springs, but are not limited thereto.
[0054] The working process of the locking mechanism proposed in this utility model is as follows: Initial state as follows: Figures 5-6 As shown, when the locking structure is in the unlocked free state, the anti-friction bearing 421 abuts against the top block 62. At this time, the radial locking device 42 is in the initial position with the maximum axial length and the minimum radial angle. The first elastic element 73 is in the maximum compressed state, and the second elastic element 74 is in the relaxed state. The locking start-up stage is as follows: Figures 7-8 As shown, when the pneumatic actuator drives the movable shaft 4 to move axially backward, the preloaded plunger 71 moves backward simultaneously, the cam 72 begins to enter the inner cavity of the fixed shaft 5, the first elastic element 73 begins to release its elastic force and pushes the inclined wedge of the radial locking device 42 radially outward through the top block 62, causing the anti-friction bearing 421 to slide to both sides along the contact surface of the fixed plate 41; the fully locked state is as follows Figures 9-10 As shown, as the movable shaft 4 continues to move backward, the wedge block fully unfolds along the fixed plate 41. At this time, the cam shaft 72 fully enters the inner cavity of the fixed shaft 5, the second elastic element 74 reaches maximum compression, and the first elastic element 73 fully rebounds, causing the top block 62 to reach its end position. The wedge block of the radial locking device 42 is pushed to the maximum radial expansion position, forming a rigid lock. When the pneumatic actuator stops driving, the restoring force of the second elastic element 74 pushes the movable shaft 4 and the preload plunger 71 forward, causing the cam shaft 72 to exit from the inner cavity of the fixed shaft 5. At this time, the wedge block of the radial locking device 42 retracts under the action of the restoring force, and the anti-friction bearing 421 re-abuts against the top block 62. Simultaneously, the forward-moving preload plunger 71 and the anti-friction bearing 421 bidirectionally compress the first elastic element to the maximum compression state, causing the device to fully return to the initial unlocked position, completing the entire working cycle.
[0055] Anti-loosening reel device
[0056] Please refer to Figures 1-10This embodiment provides an anti-loosening winding device, including a drive assembly 1, a main shaft 2, and a material carrier plate 3. One end of the main shaft 2 is connected to the drive assembly 1, and the other end is connected to the material carrier plate 3. The drive assembly 1 includes a power unit that drives the main shaft 2 to rotate, thereby causing the material carrier plate 3 mounted on the main shaft 2 to rotate, realizing the winding operation of the roll material. Further, as... Figures 1-2 As shown, the power unit is a drive motor 11; the drive assembly 1 includes a transmission system consisting of a drive motor 11, a drive wheel 12, a synchronous belt 13, and a driven gear 14. The drive wheel 12 is fixedly installed at the output end of the drive motor 11, the driven gear 14 is sleeved on one end of the main shaft 2, and the synchronous belt 13 surrounds and connects the drive wheel 12 and the driven gear 14 to form a complete power transmission, realize the rotation drive of the main shaft 2, and ensure the stability of the unwinding operation.
[0057] Specifically, one end of the main shaft 2 is fixed to the driven gear 14 via a key connection, and the other end is connected to the material carrying plate 3 via a flange to ensure effective torque transmission.
[0058] Furthermore, such as Figure 3 As shown, the unwinding shaft assembly also includes a locking mechanism as described above for fixing the material carrier tray 3. The locking mechanism includes an axial drive assembly, a fixing plate 41, and a radial locking device 42. The fixing plate 41 is installed on the side of the material carrier tray 3 and sleeved on the outer wall of the main shaft 2; that is, the material carrier tray 3 is first sleeved onto the main shaft 2 and then the fixing plate 41 is installed. The axial drive assembly includes a movable shaft 4 and a pneumatic actuator. Specifically, the movable shaft 4 is coaxially arranged in the internal cavity of the main shaft 2, with one end connected to the pneumatic actuator and the other end extending towards the material carrier tray 3 and passing through it before being hinged to the radial locking device 42. During operation, when the pneumatic actuator drives the movable shaft 4 to move axially, the radial locking device 42 generates a radial expansion motion, forming a rigid connection with the fixing plate 41 through mechanical interference, thereby achieving rapid locking and fixing of the material carrier tray 3 while ensuring locking reliability and convenient material tray replacement. The pneumatic actuator can be a diaphragm cylinder, a piston linear cylinder, or other conventional pneumatic actuators.
[0059] Furthermore, the locking mechanism is not only applicable to this anti-loosening reel device, but can also be applied to other rotating equipment that requires axial positioning and radial locking, such as various winding and unwinding mechanisms in industrial roll material processing equipment, and rotating components that require high-precision positioning in the field of precision transmission.
[0060] The working process of the anti-loosening reel device provided in this embodiment is as follows: In the initial state, the pneumatic actuator is in the reset position, the movable shaft 4 is fully extended, the radial locking device 42 remains in the contracted state, the first elastic element 73 is in the pressed state, the second elastic element 74 remains in the relaxed state, the trapezoidal boss 422 of the limiting structure remains separated from the contact plane 423, and the material carrying plate 3 is in the detachable state; During operation, the pneumatic actuator drives the movable shaft 4 to retract and move backward, driving the pre-tightening plunger 71 to compress the second elastic element 74, while the first elastic element 73 returns towards the top block 62. When the spring is released, the top block 62 pushes the wedge block of the radial locking device 42 radially outward until the wedge block forms rigid contact with the fixed plate 41, completing the locking state. When unlocking, the system automatically resets by relying on the energy stored in the spring. The second elastic element 74 rebounds and drives the movable shaft 4 and the pre-tightening plunger 71 back to their original positions. After the movable shaft 4 returns to its original position, the radial locking device 42 disengages from the contact of the fixed plate 41. The wedge block of the radial locking device 42 retracts inward, and the top block 62 and the pre-tightening plunger 71 press the first elastic element 73, so that the radial locking device 42 is unlocked smoothly and all components return to their initial positions.
[0061] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0062] Obviously, the embodiments described above are only some embodiments of this utility model, not all embodiments. The accompanying drawings show preferred embodiments of this utility model, but do not limit the patent scope of this utility model. This utility model can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this utility model specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this utility model.
Claims
1. A locking mechanism, characterized in that, include: An axial drive assembly and a radial locking device (42); the radial locking device (42) is hinged to the actuating end of the axial drive assembly; the axial drive assembly includes a drive actuator and a movable shaft (4), the movable shaft (4) is axially movable, one end of which is connected to the drive actuator and the other end is connected to the radial locking device (42); when the axial drive assembly drives the movable shaft (4) to move axially, it drives the radial locking device (42) to generate a radial expansion movement, thereby locking the object to be locked.
2. The locking mechanism according to claim 1, characterized in that, The radial locking device (42) includes two symmetrically arranged wedges, which are hinged to each other at the end of the movable shaft (4) via a hinge shaft.
3. The locking mechanism according to claim 2, characterized in that, The radial locking device (42) has a limiting structure on the outside of the hinge end, which prevents further radial expansion when the wedge block is extended to 30~60°.
4. The locking mechanism according to claim 3, characterized in that, The limiting structure includes trapezoidal bosses (422) on both sides of the hinge end of each wedge and contact planes (423) arranged alternately with the trapezoidal bosses (422); the trapezoidal bosses (422) of the two wedges and the contact planes (423) form a mechanical limiting that abuts against each other.
5. The locking mechanism according to claim 2, characterized in that, The working end of the wedge block is provided with a friction-reducing bearing (421), which forms a rolling contact with the fixed plate (41).
6. The locking mechanism according to claim 1, characterized in that, The movable shaft (4) is coaxially provided with a fixed shaft (5). The end of the fixed shaft (5) is connected in sequence to a pre-tightening device (7) and a pre-opening structure (6). The pre-opening structure (6) includes a connecting rod (61) and a top block (62). One end of the connecting rod (61) is fixedly connected to the pre-tightening device (7), and the other end is movably connected to the top block (62).
7. The locking mechanism according to claim 6, characterized in that, The pre-tightening device (7) includes a pre-tightening plunger (71), a first elastic element (73), and a second elastic element (74); the pre-tightening plunger (71) is slidably disposed at the end of the fixed shaft (5), and its inner end extends to form a convex shaft (72); the first elastic element (73) is disposed between the pre-tightening plunger (71) and the top block (62) and is coaxially sleeved on the outer periphery of the connecting rod (61).
8. The locking mechanism according to claim 7, characterized in that, The second elastic element (74) is sleeved on the outer peripheral wall of the fixed shaft (5); the two ends of the second elastic element (74) are respectively restricted by the pre-tightening plunger (71) and the limiting structure of the fixed shaft (5); when the movable shaft (4) moves axially, the pre-tightening plunger (71) compresses the second elastic element (74) and drives the convex shaft (72) to move into the fixed shaft (5).
9. The locking mechanism according to claim 8, characterized in that, The first elastic element (73) and the second elastic element (74) are compression springs.
10. A device for preventing loosening of a reel, characterized in that, include: The drive assembly (1), main shaft (2), material carrier plate (3) and locking mechanism as described in any one of claims 1 to 9; the movable shaft (4) is coaxially disposed in the internal cavity of the main shaft (2), and the two ends of the main shaft (2) are respectively connected to the drive assembly (1) and the material carrier plate (3); the fixing plate (41) of the locking mechanism is disposed on the side of the material carrier plate (3) and sleeved on the outer wall of the main shaft (2).