Structure controlled by air cylinder and capable of automatically achieving clamping and locking of concave shaft and convex shaft

Abstract

The utility model discloses a structure controlled by an air cylinder for automatically realizing clamping and locking of concave and convex shafts, which comprises a film releasing machine, an electromagnetic clutch and an electromagnetic brake which are arranged on the side surface of the film releasing machine, and a film releasing rod which is assembled and connected between support frames of the film releasing machine, air cylinders are fixedly connected to the two sides of the electromagnetic clutch and the two sides of the electromagnetic brake correspondingly, steel plates are fixedly connected to the output ends of the air cylinders on the two sides, and movable shafts are rotationally connected to the middles of the steel plates correspondingly. The rotating resistance of the film releasing rod can be controlled by controlling the current of the electromagnetic brake, the rotating power of the film releasing rod can be controlled by controlling the current of the electromagnetic clutch, an operator does not need to perform manual alignment, and the machine can automatically realize transmission clamping and automatic assembly; the structure can automatically start action and lock the shaft head of the film releasing rod through the sensor, so that negative effects caused by misoperation of personnel are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of concave-convex shaft locking, in particular to a structure which is controlled by a cylinder and can automatically realize the locking of a concave-convex shaft. Background Art

[0002] Film placing rods are rod-shaped tools used to place or support film. They have different applications in different fields. For example, in the packaging industry, film placing rods are often used to transport and position packaging film. In the agricultural field, especially in greenhouse cultivation, film placing rods are used to support and fix film to cover and protect crops. In the mechanical age, in order to improve the efficiency of film placing rods, most of the current film placing rods are driven by motors.

[0003] The film release rod usually consists of a rod body and a supporting structure. The rod body can be made of metal, plastic or other sturdy and durable materials and is used to support the film. The supporting structure is used to fix the film release rod in the desired position to ensure its stability. The rod body and the supporting structure need to be manually assembled and installed.

[0004] The cam is provided with a locking device for limiting the position of the dummy film passing through the film-releasing rod of the cam, a bearing provided in the locking device and passing through the film-releasing rod of the cam, and a tightening ring for locking the locking device. The dummy film fixing and tension eliminating device of the cam is provided with a locking device with a bearing on the film-releasing rod of the cam, and the locking device can be locked by the locking ring. When the dummy film is driven by the steel rod to move, the movement of the dummy film drives the bearing to rotate on the film-releasing rod, thereby overcoming the disadvantage of the passive rotation of the dummy film, realizing the rotation of the dummy film itself, providing a certain buffer to the surface tension of the dummy film, and solving the problems of dummy film fixing and shrinkage and bending of the cam products. However, the assembly efficiency of the film-releasing rod locking device of the cam is poor, which affects the overall use efficiency of the cam.

[0005] During installation, the existing motor-driven film placing rod structure uses a concave-convex groove positioning structure to achieve transmission. Manual alignment is required during the installation of the film placing rod, resulting in low film placing rod installation efficiency and inconvenient operation.

[0006] In order to solve the above-mentioned deficiencies in the prior art, it is a problem worth studying to provide a new structure that is controlled by a cylinder and automatically realizes the locking of the concave and convex shafts. Utility Model Content

[0007] The purpose of the utility model is to overcome the problem that the existing motor-driven film-releasing rod structure adopts a concave-convex groove locking structure to realize transmission during installation, and manual alignment is required during the installation of the film-releasing rod, resulting in low film-releasing rod installation efficiency and inconvenient operation. A structure that is automatically locked by the concave-convex shaft and controlled by a cylinder is provided, which can automatically realize transmission locking by using the cylinder.

[0008] The purpose of the utility model is achieved through the following technical solutions: a structure controlled by a cylinder to automatically realize the locking of the concave and convex shafts, including a film unloading machine, a film unloading rod is arranged between the support frames of the film unloading machine, including an electromagnetic clutch and an electromagnetic brake arranged on the side of the film unloading machine, both sides of the electromagnetic clutch and the electromagnetic brake are fixedly connected with cylinders, the output ends of the cylinders on both sides are fixedly connected with steel plates, the middle parts of the steel plates are rotatably connected with movable shafts, and the movable shafts are inserted from the middle of the electromagnetic clutch or the electromagnetic brake respectively.

[0009] Optionally, a first clutch inner sleeve is provided on the inner side of the electromagnetic clutch, a brake inner sleeve is provided on the inner side of the electromagnetic brake, flat keys are provided on both sides of the movable shaft, and the movable shaft is slidingly connected to the first clutch inner sleeve and the brake inner sleeve respectively through flat keys.

[0010] The above technical solution is adopted: by providing a movable shaft with a flat key on both the electromagnetic clutch and the electromagnetic brake, the movable shaft can slide in the first clutch inner sleeve or the brake inner sleeve to adjust the assembly relationship between the end of the movable shaft and the end of the film release rod. After completing the preliminary assembly of the film release rod, the output end is retracted by the cylinder, driving the steel plate and the movable shaft on the output end of the cylinder to retract inward, so that the end of the movable shaft cooperates with the end of the film release rod, and the cylinder control realizes automatic positioning and locking of the film release rod after installation.

[0011] Optionally, the ends of the movable shaft are provided with shaft heads, the ends of the shaft heads are provided with concave grooves, and the end of the film releasing rod close to the movable shaft is fixedly connected with a pin, the pin is cylindrical, and the shape of the pin is adapted to the shape of the concave groove of the shaft head.

[0012] Optionally, the axis of the pin is offset from the axis of the film placing rod by a certain angle, and when the film placing rod rotates to a certain angle, the inclination angle of the pin is matched with the inclination angle of the concave groove of the shaft head.

[0013] The above technical solution is adopted: by tilting the pin at the end of the film release rod at a certain angle, an angle is formed between the groove at the end of the movable shaft of the electromagnetic brake and the pin, which makes the two structures temporarily unable to be locked and assembled together. Then, as the film material pulls the film release rod to rotate, the angle between the pin and the concave groove of the shaft head is continuously deflected. When the structural angles of the two are consistent, the cylindrical pin slides into the cylindrical concave groove of the shaft head, thereby realizing the power transmission effect of the movable shaft driving the film release rod to rotate synchronously. The movable shaft rotates synchronously with the inner sleeve of the brake, and the rotational resistance is obtained through the internal resistance generation principle of the electromagnetic brake, and finally transmitted to the film release rod, so that the film roll rotation obtains stable resistance. The size of the rotational resistance of the film release rod can be controlled by controlling the current of the electromagnetic brake.

[0014] Optionally, the outer side of one end of the electromagnetic clutch is rotatably connected to a second clutch inner sleeve, the outside of the second clutch inner sleeve is fixedly connected to a sprocket by screws, the second clutch inner sleeve is transmission-connected to the first clutch inner sleeve through a flexible connection structure inside the electromagnetic clutch, and the sprocket is transmission-connected to the drive structure through a chain.

[0015] The above technical solution is adopted: by arranging a second clutch inner sleeve with a sprocket on the outside of the electromagnetic clutch, after the film releasing rod is pushed into the film releasing machine bracket, the cylinder continuously presses the movable shaft to apply pressure in the direction of the film releasing rod. Due to the angle between the pin of the film releasing rod and the shaft head groove of the movable shaft, the two cannot be temporarily locked together. Then the kinetic energy of the driving structure is transmitted to the sprocket by the chain transmission, and the sprocket drives the second clutch inner sleeve to rotate. The second clutch inner sleeve drives the first clutch inner sleeve to rotate through the flexible connection structure inside the electromagnetic clutch, and the first clutch inner sleeve drives the movable shaft to rotate. The concave groove of the shaft head of the movable shaft and the pin at the end of the film releasing rod are deflected at an angle. When the structural angles of the two are consistent, the pin will slide into the concave groove of the shaft head of the movable shaft, thereby realizing the transmission effect of the movable shaft driving the film releasing rod to rotate synchronously. Finally, the film releasing rod obtains power by rotating. The strength of the film releasing rod rotation power can be controlled by controlling the current of the electromagnetic clutch.

[0016] Optionally, a bearing seat is fixedly connected to the middle of the steel plate, a bearing is rotatably connected inside the bearing seat, the inner side of the bearing cooperates with the end of the movable shaft, and the steel plate is rotatably connected to the movable shaft through the bearing seat and the bearing.

[0017] The utility model has the following advantages:

[0018] 1. The structure of automatically locking the concave and convex shafts controlled by the cylinder tilts the pin at the end of the film-releasing rod at a certain angle. There is an angle between the groove at the end of the movable shaft of the electromagnetic brake and the pin, which makes it temporarily impossible for the two structures to be locked and assembled together. Then, as the film material pulls the film-releasing rod to rotate, the angle between the pin and the concave groove of the shaft head is continuously deflected. When the structural angles of the two are consistent, the cylindrical pin slides into the cylindrical concave groove of the shaft head, thereby achieving a power transmission effect in which the movable shaft drives the film-releasing rod to rotate synchronously. The movable shaft rotates synchronously with the inner sleeve of the brake, and the rotational resistance is obtained through the principle of internal resistance of the electromagnetic brake, which is finally transmitted to the film-releasing rod, so that the film roll rotation obtains stable resistance. The size of the rotational resistance of the film-releasing rod can be controlled by controlling the current of the electromagnetic brake.

[0019] 2. The structure of automatically realizing the locking of the concave and convex shafts controlled by the cylinder is achieved by arranging a second clutch inner sleeve with a sprocket on the outside of the electromagnetic clutch. After the film placing rod is pushed into the film placing machine bracket, the cylinder continuously presses the movable shaft to apply pressure in the direction of the film placing rod. Due to the angle between the pin of the film placing rod and the shaft head groove of the movable shaft, the two cannot be locked together temporarily. Then the kinetic energy of the driving structure is transmitted to the sprocket by the chain transmission, and the sprocket drives the second clutch inner sleeve to rotate. The second clutch inner sleeve is connected to the flexible link inside the electromagnetic clutch. The connecting structure drives the first clutch inner sleeve to rotate, and the first clutch inner sleeve drives the movable shaft to rotate. The concave groove of the shaft head of the movable shaft and the pin at the end of the film release rod are deflected at an angle. When the structural angles of the two are consistent, the pin will slide into the concave groove of the shaft head of the movable shaft, thereby realizing the transmission effect of the movable shaft driving the film release rod to rotate synchronously. Ultimately, the film release rod is rotated to obtain power. By controlling the current of the electromagnetic clutch, the strength of the film release rod rotation power can be controlled, so that the operator does not need to manually align, and the transmission locking can be automatically achieved using the cylinder.

[0020] 3. The structure for automatically realizing the locking of the concave and convex shafts controlled by the cylinder is realized by arranging a movable shaft with a flat key on both the electromagnetic clutch and the electromagnetic brake, so that the movable shaft can slide in the inner sleeve of the first clutch or the inner sleeve of the brake to adjust the assembly relationship between the end of the movable shaft and the end of the film-releasing rod. After the initial assembly of the film-releasing rod is completed, the output end is contracted by the cylinder to drive the steel plate and the movable shaft on the output end of the cylinder to contract inward, so that the end of the movable shaft cooperates with the end of the film-releasing rod, and the automatic locking of the film-releasing rod after installation is realized by the cylinder control. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural diagram of the film placing machine of the present utility model;

[0022] Figure 2 For this utility model Figure 1 Schematic diagram of the enlarged structure at A in the middle;

[0023] Figure 3 This is a schematic cross-sectional view of the electromagnetic clutch of the present invention;

[0024] Figure 4 This is a schematic cross-sectional view of the electromagnetic brake of the present invention.

[0025] In the figure: 1-pin, 2-shaft head, 3-sprocket, 4-electromagnetic clutch, 5-steel plate, 6-flat key, 7-bearing, 8-movable shaft, 9-bearing seat, 10-cylinder, 11-first clutch inner sleeve, 12-second clutch inner sleeve, 14-film unwinding machine, 15-film unwinding rod, 16-electromagnetic brake, 17-brake inner sleeve. DETAILED DESCRIPTION

[0026] The following describes in detail embodiments of the present invention. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention. Example 1

[0027] like Figures 1 to 4 As shown, a structure for automatically realizing the locking of the concave and convex shafts controlled by an air cylinder includes a film unloading machine 14, a film unloading rod 15 is arranged between the support frames of the film unloading machine 14, and an electromagnetic clutch 4 and an electromagnetic brake 16 are arranged on the side of the film unloading machine 14, and both sides of the electromagnetic clutch 4 and the electromagnetic brake 16 are fixedly connected with air cylinders 10, and the output ends of the cylinders 10 on both sides are fixedly connected with steel plates 5, and the middle of the steel plates 5 are rotatably connected with movable shafts 8, and the movable shafts 8 are inserted from the middle of the electromagnetic clutch 4 or the electromagnetic brake 16 respectively.

[0028] like Figures 3 and 4 As shown, a first clutch inner sleeve 11 is provided on the inner side of the electromagnetic clutch 4, a brake inner sleeve 17 is provided on the inner side of the electromagnetic brake 16, and flat keys 6 are provided on both sides of the movable shaft 8. The movable shaft 8 is slidably connected to the first clutch inner sleeve 11 and the brake inner sleeve 17 respectively through the flat keys 6;

[0029] The sliding stroke of the rotating shaft 8 on the flat key 6 is greater than the length of the pin 1, so that when the pin 1 is matched with the concave groove of the shaft head 2, the pin 1 can completely enter the interior of the concave groove of the shaft head 2, completing full assembly and locking;

[0030] By providing a movable shaft 8 with a flat key 6 on both the electromagnetic clutch 4 and the electromagnetic brake 16, the movable shaft 8 can slide in the first clutch inner sleeve 11 or the brake inner sleeve 17 to adjust the assembly relationship between the end of the movable shaft 8 and the end of the film-releasing rod 15. After completing the preliminary assembly of the film-releasing rod 15, the cylinder 10 shrinks the output end, driving the steel plate 5 and the movable shaft 8 on the output end of the cylinder 10 to shrink inward, so that the end of the movable shaft 8 cooperates with the end of the film-releasing rod 15, and the cylinder 10 controls the automatic locking of the film-releasing rod 15 after installation.

[0031] like Figures 3 and 4 As shown, the ends of the movable shaft 8 are provided with shaft heads 2, and the ends of the shaft heads 2 are provided with concave grooves. The end of the film releasing rod 15 close to the movable shaft 8 is fixedly connected with a pin 1, and the pin 1 is cylindrical, and the shape of the pin 1 is adapted to the shape of the concave groove of the shaft head 2.

[0032] like Figure 4 As shown, the axis of the pin 1 is offset from the axis of the film-releasing rod 15 by a certain angle. When the film-releasing rod 15 rotates to a certain angle, the inclination angle of the pin 1 matches the inclination angle of the concave groove of the shaft head 2.

[0033] By tilting the pin 1 at the end of the film-releasing rod 15 at a certain angle, an angle is formed between the groove at the end of the movable shaft 8 of the electromagnetic brake 16 and the pin 1, which makes it temporarily impossible for the two structures to be assembled together. Then, as the film material pulls the film-releasing rod 15 to rotate, the angle of the pin 1 and the concave groove of the shaft head 2 is continuously deflected. When the structural angles of the two are consistent, the cylindrical pin 1 slides into the cylindrical concave groove of the shaft head 2, thereby realizing the power transmission effect of the movable shaft 8 driving the film-releasing rod to rotate synchronously. The movable shaft 8 rotates synchronously with the brake inner sleeve 17, and obtains rotational resistance through the internal resistance generation principle of the electromagnetic brake 16, which is finally transmitted to the film-releasing rod, so that the film roll rotation obtains stable resistance. The size of the rotational resistance of the film-releasing rod 15 can be controlled by controlling the current of the electromagnetic brake.

[0034] like Figure 3 As shown, the outer side of one end of the electromagnetic clutch 4 is rotatably connected to the second clutch inner sleeve 12, the outer side of the second clutch inner sleeve 12 is fixedly connected to the sprocket 3 by screws, the second clutch inner sleeve 12 is transmission-connected to the first clutch inner sleeve 11 through the flexible connection structure inside the electromagnetic clutch 4, and the sprocket 3 is transmission-connected to the drive structure through a chain;

[0035] By arranging a second clutch inner sleeve 12 with a sprocket 3 on the outside of the electromagnetic clutch 4, after the film-releasing rod 15 is pushed into the film-releasing machine 14 bracket, the cylinder 10 continuously presses the movable shaft 8 to apply pressure in the direction of the film-releasing rod 15. Since there is an angle between the pin 1 of the film-releasing rod and the shaft head groove of the movable shaft 8, the two cannot be locked together temporarily. Then the kinetic energy of the driving structure is transmitted to the sprocket 3 by the chain transmission, and the sprocket 3 drives the second clutch inner sleeve 12 to rotate. The second clutch inner sleeve 12 is driven by the electromagnetic clutch 4. The flexible connection structure of the first clutch inner sleeve 11 drives the rotation of the first clutch inner sleeve 11, and the first clutch inner sleeve 11 drives the movable shaft 8 to rotate. The concave groove of the shaft head of the movable shaft 8 and the pin 1 at the end of the film release rod 15 are deflected at an angle. When the structural angles of the two are consistent, the pin 1 will slide into the concave groove of the shaft head of the movable shaft 8, thereby realizing the transmission effect of the movable shaft 8 driving the film release rod 14 to rotate synchronously. Finally, the film release rod 15 rotates to obtain power. The strength of the rotational power of the film release rod 15 can be controlled by controlling the current of the electromagnetic clutch 4.

[0036] like Figures 3 and 4 As shown, the middle part of the steel plate 5 is fixedly connected to a bearing seat 9, the interior of the bearing seat 9 is rotatably connected to a bearing 7, the inner side of the bearing 7 is matched with the end of the movable shaft 8, and the steel plate 5 is rotatably connected to the movable shaft 8 through the bearing seat 9 and the bearing 7. Example 2

[0037] The cross-sectional shape of the concave groove of the shaft head 2 of the movable shaft 8 is a right-angled triangle, so that when the pin 1 enters the concave groove of the shaft head 2, the right-angled side of the concave groove can enable the end of the pin 1 to smoothly enter the innermost part of the concave groove, avoiding the situation where the tilted pin 1 and the horizontal movement direction of the shaft head 2 are inconsistent, resulting in the pin 1 sliding into the concave groove of the shaft head 2 not smoothly.

[0038] The working principle of this utility model is as follows:

[0039] S1. Operation method of electromagnetic brake: There is an angle between the groove at the end of the movable shaft 8 of the electromagnetic brake 16 and the pin 1, which makes the two structures temporarily unable to be locked and assembled together. Then, as the film material pulls the film-releasing rod 15 to rotate, the angle of the pin 1 and the concave groove of the shaft head 2 is continuously deflected. When the structural angles of the two are consistent, the cylindrical pin 1 slides into the cylindrical concave groove of the shaft head 2, thereby realizing the power transmission effect of the movable shaft 8 driving the film-releasing rod to rotate synchronously. The movable shaft 8 rotates synchronously with the brake inner sleeve 17, and the rotational resistance is obtained through the internal resistance generation principle of the electromagnetic brake 16, and finally transmitted to the film-releasing rod, so that the film roll rotation obtains stable resistance;

[0040] When the film releasing rod 15 is pushed into the film releasing machine 14 bracket, the cylinder 10 continuously presses the movable shaft 8 to apply pressure in the direction of the film releasing rod 15. Due to the angle between the pin 1 of the film releasing rod and the shaft head groove of the movable shaft 8, the two cannot be locked together temporarily. Then the kinetic energy of the driving structure is transmitted to the sprocket 3 by the chain transmission, and the sprocket 3 drives the second clutch inner sleeve 12 to rotate. The second clutch inner sleeve 12 drives the first clutch inner sleeve 11 to rotate through the flexible connection structure inside the electromagnetic clutch 4. The first clutch inner sleeve 11 drives the movable shaft 8 to rotate. The concave groove of the shaft head of the movable shaft 8 and the pin 1 at the end of the film releasing rod 15 are deflected at an angle. When the structural angles of the two are consistent, the pin 1 will slide into the concave groove of the shaft head of the movable shaft 8, thereby realizing the transmission effect of the movable shaft 8 driving the film releasing rod 14 to rotate synchronously, and finally the film releasing rod 15 rotates to obtain power.

Claims

1. A structure for automatically locking a concave and convex shaft controlled by a cylinder, comprising a film placing machine (14), a film placing rod (15) being provided between the supporting frames of the film placing machine (14), and characterized in that: The invention comprises an electromagnetic clutch (4) and an electromagnetic brake (16) arranged on the side of a film unwinding machine (14), wherein both sides of the electromagnetic clutch (4) and the electromagnetic brake (16) are fixedly connected to a cylinder (10), and the output ends of the cylinders (10) on both sides are fixedly connected to a steel plate (5), and the middle of the steel plate (5) is rotatably connected to a movable shaft (8), and the movable shaft (8) is inserted from the middle of the electromagnetic clutch (4) or the electromagnetic brake (16).

2. The structure for automatically locking the concave and convex shafts controlled by a cylinder according to claim 1, characterized in that: A first clutch inner sleeve (11) is provided on the inner side of the electromagnetic clutch (4), a brake inner sleeve (17) is provided on the inner side of the electromagnetic brake (16), and flat keys (6) are provided on both sides of the movable shaft (8). The movable shaft (8) is slidably connected to the first clutch inner sleeve (11) and the brake inner sleeve (17) through the flat keys (6).

3. The structure for automatically locking the concave and convex shafts controlled by a cylinder according to claim 1, characterized in that: The ends of the movable shafts (8) are provided with shaft heads (2), and the ends of the shaft heads (2) are provided with concave grooves. The end of the film-releasing rod (15) close to the movable shaft (8) is fixedly connected with a pin (1), and the pin (1) is cylindrical, and the shape of the pin (1) is adapted to the shape of the concave groove of the shaft head (2).

4. The structure for automatically locking the concave and convex shafts controlled by a cylinder according to claim 3, characterized in that: The axis of the pin (1) is offset from the axis of the film-releasing rod (15) by a certain angle, and when the film-releasing rod (15) rotates to a certain angle, the inclination angle of the pin (1) matches the inclination angle of the concave groove of the shaft head (2).

5. The structure for automatically locking the concave and convex shafts controlled by a cylinder according to claim 4, characterized in that: The outer side of one end of the electromagnetic clutch (4) is rotatably connected to a second clutch inner sleeve (12), the outer side of the second clutch inner sleeve (12) is fixedly connected to a sprocket (3) via screws, the second clutch inner sleeve (12) is transmission-connected to the first clutch inner sleeve (11) via a flexible connection structure inside the electromagnetic clutch (4), and the sprocket (3) is transmission-connected to a driving structure via a chain.

6. The structure for automatically locking the concave and convex shafts controlled by a cylinder according to claim 1, characterized in that: The middle of the steel plate (5) is fixedly connected to a bearing seat (9), the interior of the bearing seat (9) is rotatably connected to a bearing (7), the inner side of the bearing (7) is matched with the end of the movable shaft (8), and the steel plate (5) is rotatably connected to the movable shaft (8) through the bearing seat (9) and the bearing (7).

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