Round cap screwing head

Abstract

The utility model relates to the technical field of cap screwing devices, in particular to a circular cap screwing head which comprises a cap screwing head body, an air cavity is formed in the cap screwing head body, a piston in sliding connection with the cap screwing head body is arranged on the portion, below the air cavity, of the cap screwing head body, and a reset spring is fixed to the portion, below the piston, of the cap screwing head body. A plurality of rotating shafts are uniformly fixed on the cap screwing head main body on the peripheral side of the piston, rotating arms rotationally connected with the rotating shafts are arranged on the rotating shafts, rolling wheels matched with the piston for use are arranged on the rotating arms, reset pressure springs are fixed between the rotating arms and the cap screwing head main body, and clamping jaws are fixed at the bottoms of the rotating arms. Fixing blocks are fixed to the clamping jaws through locking pads, and the fixing blocks are in a ring shape after being folded. According to the cap screwing device, the fixing blocks of different sizes can be selected according to needs to meet the cap screwing requirements of bottle caps of different sizes, the fixing blocks and the bottle caps cannot slide relatively, and the bottle caps can be accurately screwed on bottle bodies.

Description

Technical Field

[0001] The invention relates to the technical field of capping devices, in particular to a circular capping head. Background Art

[0002] The automatic capping machine is a device that can screw the bottle cap onto the bottle body. It is widely used in daily chemical, food, medicine and other industries. Its structure generally includes a frame, a power transmission device and a capping assembly. The capping assembly has a rotating part. The power device drives the rotating part to rotate. The bottle cap is clamped in the clamping head of the rotating part. As the rotating part rotates, the bottle cap is tightened on the bottle body. At present, the clamping head of the rotating part is usually a claw structure. Patent application number: CN201420334887.3 discloses a constant torque claw capping head mechanism, including a capping transmission shaft, a transmission mechanism, and a capping head mechanism. The invention discloses a capping mechanism, an adjusting mechanism and a capping mechanism, wherein the capping mechanism comprises a flange, a capping wheel seat sleeved on the outside of the flange, a spline sleeve sleeved inside the flange, a guide sleeve arranged on the outside of the spline sleeve and a capping head connected to the tail of the guide sleeve; the capping wheel seat is fixedly mounted on the outside of the flange by means of hexagon socket screws; a plurality of capping claws are arranged on the side of the bottom of the capping wheel seat; the capping claws comprise a first capping arm fixedly arranged on the bottom of the capping wheel seat, a second capping arm longitudinally rotatably connected to the bottom of the first capping arm, a guide wheel arranged on the inner side of the second capping arm and a capping wheel arranged on the bottom of the second capping arm. When screwing the cap, the capping wheel contacts the bottle cap to fix the bottle cap, and after the bottle cap is fixed, it drives the bottle cap to rotate and rotates the bottle cap onto the bottle body. However, the capping wheel of this type of capping mechanism is a columnar structure, and the bottle cap is a cylindrical structure. The columnar structure contacts the cylindrical bottle cap, and the capping wheel and the bottle cap are in point contact, with a small contact area and small friction. When the capping wheel drives the bottle cap to rotate, the capping wheel and the bottle cap slide, resulting in the bottle cap being unable to be tightened on the bottle body.

[0003] The present invention is proposed in view of the deficiencies in the prior art. Summary of the invention

[0004] The purpose of the present invention is to overcome the above-mentioned disadvantages of the prior art and provide a circular capping head.

[0005] The present invention can be implemented by the following technical solutions:

[0006] The invention discloses a circular screw capping head, comprising a screw capping head main body, wherein an air cavity is arranged in the screw capping head main body, a piston slidably connected with the screw capping head main body is arranged on the screw capping head main body below the air cavity, a return spring is fixed on the screw capping head main body below the piston, a plurality of rotating shafts are evenly fixed on the screw capping head main body around the piston, a rotating arm rotatably connected with the rotating shaft is arranged on the rotating shaft, a rolling wheel used in conjunction with the piston is arranged on the rotating arm, a return compression spring is fixed between the rotating arm and the screw capping head main body, a clamping claw is fixed on the bottom of the rotating arm, a fixing block is fixed on the clamping claw through a locking pad, and the fixing block is annular when closed. A fixed block of corresponding size is selected according to the size of the bottle cap. The inner diameter of the fixed block after closing matches the outer diameter of the bottle cap. The corresponding fixed block is fixed on the corresponding clamping claw through a locking pad. When screwing the bottle cap, gas is filled into the air cavity through a pneumatic device. The pressure in the air cavity increases, pushing the piston down. When the piston goes down, the piston pushes the rolling wheel to move, and the rotating arm rotates around the rotating shaft. The clamping claws at the bottom of the rotating arm close together, and the fixed blocks close together. After the inside of the fixed block contacts the bottle cap, the bottle cap is fixed, and the device is driven to rotate by the screwing mechanism to screw the bottle cap on the bottle body. After completion, the gas in the air cavity is discharged, the return spring returns to its natural state, the return spring pushes the piston to rise, and the return compression spring returns to its natural state, the return compression spring pushes the rotating arm to rotate around the rotating shaft, and the fixed block is separated from the bottle cap. The device can use fixed blocks of different sizes as needed to meet the requirements of screwing on bottle caps of different sizes, and when screwing on the cap, the fixed block is closed into a ring shape, and the inner diameter after closing corresponds to the size of the bottle cap. When screwing on the cap, the contact area between the closed fixed block and the bottle cap is large, and the fixed block and the bottle cap will not slide relative to each other, so the bottle cap can be accurately screwed on the bottle body.

[0007] Preferably, the piston comprises a columnar sliding portion and a conical pushing portion. The rolling wheel rolls on the surface of the conical pushing portion to realize the rotation of the rotating arm around the rotating shaft.

[0008] Preferably, a positioning block is fixed on the main body of the capping head below the piston, and a positioning rubber pad is fixed at the bottom of the positioning block. The positioning rubber pad contacts the top of the bottle cap to achieve the level of the top of the bottle cap, thereby ensuring that the bottle cap is accurately screwed on the bottle body.

[0009] Compared with the prior art, the present invention has the following advantages:

[0010] The device can select fixed blocks of different sizes as needed to meet the requirements of screwing on bottle caps of different sizes, and when screwing on the cap, the fixed block is closed into a ring shape, and the inner diameter after closing corresponds to the size of the bottle cap. When screwing on the cap, the contact area between the fixed block and the bottle cap is large, and the fixed block and the bottle cap will not slide relative to each other, so the bottle cap can be accurately screwed on the bottle body. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, wherein:

[0012] Figure 1 It is a structural schematic diagram of the present invention;

[0013] Figure 2 An exploded view of the present invention;

[0014] Figure 3 is a cross-sectional view of the present invention;

[0015] In the figure: 1. main body of the capping head; 2. air cavity; 3. piston; 4. sliding part; 5. pushing part; 6. reset spring; 7. rotating shaft; 8. rotating arm; 9. rolling wheel; 10. reset compression spring; 11. positioning block; 12. positioning rubber pad; 13. clamping claw; 14. fixing block; 15. locking pad; DETAILED DESCRIPTION

[0016] The embodiments of the present invention are described in detail below with reference to the accompanying drawings:

[0017] Embodiment 1:

[0018] like Figures 1 to 3As shown, the present embodiment discloses a circular screw capping head, comprising a screw capping head main body 1, an air cavity 2 is arranged in the screw capping head main body 1, a piston 3 slidably connected to the screw capping head main body 1 is arranged on the screw capping head main body 1 below the air cavity 2, a return spring 6 is fixed on the screw capping head main body 1 below the piston 3, a plurality of rotating shafts 7 are evenly fixed on the screw capping head main body 1 around the piston 3, a rotating arm 8 rotatably connected to the rotating shaft 7 is arranged on the rotating shaft 7, a rolling wheel 9 used in conjunction with the piston 3 is arranged on the rotating arm 8, a return compression spring 10 is fixed between the rotating arm 8 and the screw capping head main body 1, a clamping jaw 13 is fixed at the bottom of the rotating arm 8, a fixing block 14 is fixed on the clamping jaw 13 through a locking pad 15, and the fixing block 14 is annular when closed. A fixing block 14 of corresponding size is selected according to the size of the bottle cap. The inner diameter of the fixing block 14 after closing matches the outer diameter of the bottle cap. The corresponding fixing block 14 is fixed to the corresponding clamping claw 13 through the locking pad 15. When the bottle cap is screwed, gas is filled into the air cavity 2 through the pneumatic device. The pressure in the air cavity 2 increases, pushing the piston 3 down. When the piston 3 goes down, the piston 3 pushes the rolling wheel 9 to move, and the rotating arm 8 rotates around the rotating shaft 7. The clamping claws 13 at the bottom of the rotating arm 8 are closed together, and the fixing block 14 is closed together. After the inside of the fixing block 14 is in contact with the bottle cap, the bottle cap is fixed, and the device is driven to rotate by the screwing mechanism to achieve the bottle cap being screwed on the bottle body. After the capping is completed, the gas in the air cavity 2 is discharged, the return spring 6 returns to its natural state, the return spring 6 pushes the piston 3 to rise, and the return compression spring 10 returns to its natural state, the return compression spring 10 pushes the rotating arm 8 to rotate around the rotating shaft 7, and the fixed block 14 is separated from the bottle cap. The device can select fixed blocks 14 of different sizes as needed to meet the capping requirements of bottle caps of different sizes, and when the cap is screwed, the fixed block 14 is closed into a ring shape, and the inner diameter after closing corresponds to the size of the bottle cap. When the cap is screwed, the contact area between the closed fixed block 14 and the bottle cap is large, and the fixed block 14 and the bottle cap will not slide relative to each other, so the bottle cap can be accurately screwed on the bottle body.

[0019] The piston 3 comprises a columnar sliding portion 4 and a conical pushing portion 5. The rolling wheel 9 rolls on the surface of the conical pushing portion 5, and the rotating arm 8 rotates around the rotating shaft 7 when the piston 3 moves.

[0020] Embodiment 2:

[0021] This embodiment discloses a circular capping head. Based on the structure and principle of the first embodiment, a positioning block 11 is fixed on the capping head body 1 below the piston 3 of the present embodiment, and a positioning rubber pad 12 is fixed on the bottom of the positioning block 11. The positioning rubber pad 12 is in contact with the top of the bottle cap to achieve the level of the top of the bottle cap, thereby ensuring that the bottle cap is accurately screwed on the bottle body.

[0022] The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, various changes, modifications, substitutions and variations can be made to these embodiments without departing from the technical principles of the present invention. These changes, modifications, substitutions and variations should also be regarded as the scope of protection of the present invention.

Claims

1. A circular capping head, comprising a capping head body, characterized in that: An air cavity is provided in the capping head body, a piston slidably connected to the capping head body is provided on the capping head body below the air cavity, a return spring is fixed on the capping head body below the piston, a plurality of rotating shafts are evenly fixed on the capping head body around the piston, a rotating arm rotatably connected to the rotating shaft is provided on the rotating shaft, a rolling wheel used in conjunction with the piston is provided on the rotating arm, a return compression spring is fixed between the rotating arm and the capping head body, a clamping claw is fixed at the bottom of the rotating arm, a fixing block is fixed on the clamping claw through a locking pad, and the fixing block is annular when closed.

2. The circular capping head according to claim 1, characterized in that: The piston includes a columnar sliding portion and a tapered pushing portion.

3. The circular capping head according to claim 1, characterized in that: A positioning block is fixed on the capping head body below the piston, and a positioning rubber pad is fixed on the bottom of the positioning block.

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