Four-wheel cap twisting machine for milk powder packaging

Abstract

The utility model provides a four-wheel cap twisting machine for milk powder packaging, which comprises a pressure head capable of axially moving along the pressure head, two groups of cap screwing mechanisms arranged on the peripheral side of the pressure head, and the two cap screwing mechanisms can be close to each other; each cap screwing mechanism comprises a plurality of rubber wheels, a synchronous wheel is arranged at the top of each rubber wheel, the synchronous wheels are connected through a synchronous belt in a winding mode, so that the rotating speeds of the synchronous wheels are the same, each cap screwing mechanism further comprises tensioning wheels, the tensioning wheels in each cap screwing mechanism are arranged between the synchronous wheels in the cap screwing mechanism, the tensioning wheels abut against the synchronous belts, and the tensioning wheels abut against the synchronous belts. The tensioning wheels of the two cap screwing mechanisms are rotationally connected with the two tensioning frames correspondingly, the synchronizing wheels of the two cap screwing mechanisms are rotationally connected with the two driven frames correspondingly, and the two tensioning frames can be close to or away from each other. The synchronous belts are adopted to drive the rubber wheels to rotate, so that the rotating speeds of the rubber wheels are the same, the rotating speed difference between the rubber wheels is avoided, friction between the rubber wheels and bottle caps is reduced, the product quality is improved, and the service life of the rubber wheels is prolonged.

Description

Technical Field

[0001] The utility model belongs to the field of milk powder can packaging, and particularly relates to a four-wheel capping machine for milk powder packaging. Background Art

[0002] During the milk powder packaging process, after the milk powder can is sealed with a tear-off lid, in order to facilitate consumers to use and store the milk powder, a screw cap needs to be screwed onto the milk powder can. In the prior art, in order to tighten the screw cap, a capping machine is set above the conveyor mechanism of the production line. The screw cap is clamped and driven to rotate by a plurality of rubber wheels, so that the screw cap rotates. However, the rubber wheels of the existing capping machine are respectively driven by a plurality of motors. Due to differences in production, the rotation speeds of the motors cannot be exactly the same. During use, frequent debugging is often required. Moreover, during the contact between the rubber wheels with different rotation speeds and the outer wall of the screw cap, wear of the rubber wheels and the screw cap is likely to occur, which has an adverse effect on subsequent production and product quality. Content of the Utility Model

[0003] In view of this, the utility model aims to provide a four-wheel capping machine for milk powder packaging, so that the rotation speeds of each rubber wheel are the same, and the wear of the rubber wheels and the screw cap is reduced.

[0004] To achieve the above object, the technical solution of the utility model is realized as follows:

[0005] A four-wheel capping machine for milk powder packaging includes a pressing head that can move along its own axis, and two capping mechanisms are provided on the periphery of the pressing head, and the two capping mechanisms can approach each other; each capping mechanism respectively includes a plurality of rubber wheels, a synchronous wheel is provided at the top of each rubber wheel, and a plurality of synchronous wheels are wound and connected by a synchronous belt, so that the rotation speeds of each synchronous wheel are the same. Each capping mechanism also includes a tensioning wheel. The tensioning wheels in each group are arranged between the synchronous wheels in the group, and the tensioning wheels abut against the synchronous belt. The tensioning wheels of the two capping mechanisms are respectively rotatably connected to two tensioning frames, and the synchronous wheels of the two capping mechanisms are respectively rotatably connected to two driven frames, and the two tensioning frames can approach or move away from each other.

[0006] Further, a spring is provided between the tensioning frame and the driven frame, and one end of the spring abuts against the tensioning frame and the other end abuts against the driven frame.

[0007] Further, the tensioning frame extends towards the driven frame to form a guide rod, a guide hole is formed on the driven frame, and the guide rod passes through the guide hole.

[0008] Further, the spring is sleeved on the guide rod.

[0009] Further, a connecting portion is respectively provided on the two tensioning frames, and the two connecting portions are respectively connected to a cylinder.

[0010] Further, the capping machine further includes a fixed plate, on which a first waist-shaped hole and a second waist-shaped hole are formed, and the length directions of the first waist-shaped hole and the second waist-shaped hole are parallel to each other. The rotating shaft of the synchronous pulley passes through the first waist-shaped hole and is rotationally connected to the driven frame, and the rotating shaft of the tensioning pulley passes through the second waist-shaped hole and is synchronously connected to the tensioning frame.

[0011] Further, two synchronous pulleys are provided in each capping mechanism, and the tensioning pulley is disposed between the two synchronous pulleys.

[0012] Further, the driven frame is in a U shape, and the tensioning frame can be placed inside the U-shaped driven frame.

[0013] Further, the synchronous belt bypasses the output shaft of a motor, and the motor drives the synchronous belt to move.

[0014] Compared with the prior art, the four-wheel capping machine for milk powder packaging described in the present utility model has the following advantages:

[0015] The present utility model uses multiple synchronous belts to drive the rubber wheels to rotate, so that the rotation speeds of the rubber wheels are the same, thereby avoiding the rotational speed difference between the rubber wheels, reducing the friction between the rubber wheels and the bottle caps, improving the product quality, and prolonging the service life of the rubber wheels;

[0016] By arranging a spring in a compressed state between the tensioning frame and the driven frame, the tensioning pulley can tighten the synchronous belt, preventing the synchronous belt from loosening during the movement of the synchronous pulley and the tensioning pulley;

[0017] The U-shaped driven frame and tensioning frame leave a space between them, preventing them from interfering with each other. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments and descriptions thereof of the present utility model are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0019] Figure 1 is a schematic diagram of the overall structure of the capping machine;

[0020] Figure 2 is a schematic diagram of the internal structure of the capping machine;

[0021] Figure 3 is a schematic diagram of the winding mode of the internal synchronous belt of the capping machine;

[0022] Figure 4 is a schematic diagram of the matching structure of the tensioning frame and the driven frame.

[0023] Description of the reference numerals:

[0024] 1 - Fixed plate; 11 - Support housing; 12 - First waist-shaped hole; 13 - Second waist-shaped hole; 2 - Press head; 21 - Press cover cylinder; 3 - Cap screwing mechanism; 31 - Rubber wheel; 32 - Tensioning wheel; 33 - Synchronous wheel; 34 - Tensioning frame; 341 - Connecting part; 35 - Driven frame; 36 - Guide rod; 37 - Guide hole; 38 - Spring; 39 - Cylinder; 4 - Motor; 5 - Synchronous belt. Detailed implementation mode

[0025] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0026] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly defined and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

[0028] The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0029] The four-wheel cap screwing machine for milk powder packaging described in the present utility model includes a conveyor belt for transporting milk powder cans. Clamping mechanisms for positioning the milk powder cans or conveying mechanisms for limiting are provided on both sides of the conveyor belt. The above are the prior arts in this field and will not be elaborated here. The main problem to be solved in this application is how to screw the bottle cap tightly. The four-wheel cap screwing machine further includes a pressing head 2 and two sets of cap screwing mechanisms 3 arranged on the periphery of the pressing head 2. Each set of cap screwing mechanisms 3 respectively includes two rubber wheels 31, two synchronous wheels 33 respectively corresponding to the rubber wheels 31, and two tensioning wheels 32. The two rubber wheels 31 are coaxially connected to the synchronous wheel 33 at the top through a connecting rod. The rotating shafts of the two tensioning wheels 32 are respectively rotationally connected to a tensioning frame 34 through bearings, and the rotating shafts of the two synchronous wheels 33 are respectively connected to a driven frame 35 through bearings. The four synchronous wheels 33 in the two sets of cap screwing mechanisms 3 are wound and connected by a synchronous belt 5, so that the four synchronous wheels 33 rotate synchronously and at the same speed. The tensioning wheels 32 in the two sets of cap screwing mechanisms 3 are respectively lower than the outer side of the synchronous belt 5, and the two tensioning wheels 32 in each set of cap screwing mechanisms 3 are respectively placed between the two synchronous wheels 33 and squeeze the synchronous belt 5 inward, so that the synchronous belt 5 can be wrapped more tightly with the synchronous wheel 33, improving the stability of transmission.

[0030] The two tensioning frames 34 can approach each other. Specifically, a connecting portion 341 extends upward from the middle part of the tensioning frame 34, and the two connecting portions 341 are respectively connected to the piston rods of a cylinder 39. By controlling the synchronous movement of the two cylinders 39, the two tensioning frames 34 move simultaneously and approach each other. At this time, due to the constant length of the synchronous belt 5, under the pulling of the synchronous belt 5, the synchronous wheel 33 is pulled, so that the two driven frames 35 approach each other, and further the synchronous wheels 33 approach each other, driving the screw cap to rotate through the rubber wheel 31. The tensioning frame 34 extends out a guide rod 36 towards the direction of the driven frame 35. A guide hole 37 is opened on the driven frame 35. The guide rod 36 passes through the guide hole 37, and a spring 38 is sleeved on the guide rod 36. One end of the spring 38 abuts tightly against the tensioning frame 34, and the other end abuts against the driven frame, so that the spring 38 is always in a compressed state, so that during the movement, the maximum distance between the tensioning wheel 32 and the synchronous wheel 33 can be maintained in the current posture, preventing the synchronous belt 5 from loosening and affecting the operation of the transmission mechanism. At the same time, when the tensioning frames 34 move away from each other, it assists the driven frame 35 to reset, and can also prevent the synchronous belt 5 from loosening. The driven frame 35 is in a U shape, and the tensioning frame 34 can be placed inside the U-shaped driven frame 35, so that enough space is left between the driven frame 35 and the tensioning frame 34 to prevent interference between the tensioning frame 34 and the driven frame 35. Inside the space surrounded by the synchronous belt 5, the output shaft of a motor 4 extends into this space, and a synchronous wheel 33 is connected to the output shaft of the motor 4, driving the synchronous belt 5 to move through the motor 4.

[0031] The capping machine further includes a fixing plate 1 and a support housing 11. The fixing plate 1 and the support housing 11 are fixedly connected to the surrounding brackets, so that the capping machine is placed at a predetermined height on the conveyor belt. The fixing plate 1 and the support housing 11 enclose a space for placing components such as a synchronous pulley 33, a tensioning pulley, and a synchronous belt 5. The bottom surfaces of the fixing plate 1 and the support housing 11 are both provided with a first waist-shaped hole 12 and a second waist-shaped hole 13, and the length directions of the first waist-shaped hole 12 and the second waist-shaped hole 13 are parallel to each other. The rotating shaft of the synchronous pulley 33 passes through the first waist-shaped hole 12 and is rotatably connected to a driven frame 35. The rotating shaft of the tensioning pulley 32 passes through the second waist-shaped hole 13 and is synchronously connected to a tensioning frame 34, and the tensioning pulley 32 can move along the length direction of the second waist-shaped hole 13, and the synchronous pulley 33 can move along the length direction of the first waist-shaped hole 12. The tensioning frame 34 and the driven frame 35 are placed above the fixing plate 1 and are in contact with the upper surface of the fixing plate 1. The four-wheel capping machine for milk powder packaging according to the present invention further includes a capping cylinder 21. The piston rod of the capping cylinder 21 is connected to a pressing head 2, so that the pressing head 2 can move along its own axis and tightly press on the screw cap and rotate with the screw cap. The fixing plate 1 and the support housing 11 support and fix each wheel, frame, motor 4, and cylinder 39 (a support frame is provided between the cylinder 39 and the fixing plate 1), and at the same time prevent the external environment from affecting the operation of the synchronous belt 5.

[0032] During the working process of the four-wheel capping machine for milk powder packaging according to the present invention, when the milk powder can moves to the lower part of the capping machine, the capping cylinder 21 drives the pressing head 2 to move downward, tightly pressing the milk powder can and the screw cap. At the same time, the piston rod of the cylinder 39 that drives the tensioning frame 34 to move extends, driving the synchronous pulleys 33 to approach each other, so that the rubber wheels 31 are in contact with the screw cap. Under the action of the synchronous belt 5, the rotation speeds of the multiple rubber wheels 31 are the same, thereby avoiding the rotational speed difference between the rubber wheels 31 and reducing the friction between the rubber wheels 31 and the bottle cap. After the capping work is completed, the piston rod of the cylinder 39 retracts, and at the same time the pressing head 2 lifts upward, and the processed milk powder can moves to the subsequent work station, and the capping machine waits for the next milk powder can to enter the work station.

[0033] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A four-wheel capping machine for milk powder packaging, characterized in that: It includes a punch head that can move along its own axial direction, and two sets of capping mechanisms are provided on the circumferential side of the punch head, and the two capping mechanisms can approach each other; each set of capping mechanisms respectively includes a plurality of rubber wheels, a synchronous wheel is provided at the top of each rubber wheel, and the plurality of synchronous wheels are wound and connected by a synchronous belt, so that the rotational speeds of each synchronous wheel are the same. Each set of capping mechanisms also includes a tensioning wheel. The tensioning wheels within each set are placed between the synchronous wheels in that set, and the tensioning wheels abut against the synchronous belt. The tensioning wheels of the two sets of capping mechanisms are respectively rotatably connected to two tensioning frames, and the synchronous wheels of the two sets of capping mechanisms are respectively rotatably connected to two driven frames, and the two tensioning frames can approach or move away from each other.

2. The four-wheel capping machine for milk powder packaging according to claim 1, wherein: A spring is provided between the tensioning frame and the driven frame, and one end of the spring abuts against the tensioning frame and the other end abuts against the driven frame.

3. The four-wheel capping machine for milk powder packaging according to claim 2, characterized in that: The tensioning frame extends a guide rod towards the driven frame direction, a guide hole is formed on the driven frame, and the guide rod passes through the guide hole.

4. A four-wheel capping machine for milk powder packaging according to claim 3, characterized in that: The spring is sleeved on the guide rod.

5. A four-wheel capping machine for milk powder packaging according to claim 1, characterized in that: A connecting portion is respectively provided on the two tensioning frames, and the two connecting portions are respectively connected to a cylinder.

6. The four-wheel capping machine for milk powder packaging according to claim 1, wherein: It further includes a fixing plate. A first waist-shaped hole and a second waist-shaped hole are formed on the fixing plate, and the length directions of the first waist-shaped hole and the second waist-shaped hole are parallel to each other. The rotation shaft of the synchronous wheel passes through the first waist-shaped hole and is rotatably connected to the driven frame, and the rotation shaft of the tensioning wheel passes through the second waist-shaped hole and is synchronously connected to the tensioning frame.

7. A four-wheel capping machine for milk powder packaging according to claim 1, characterized in that: Two synchronous wheels are provided in each set of capping mechanisms, and the tensioning wheel is placed between the two synchronous wheels.

8. A four-wheel capping machine for milk powder packaging according to claim 1, wherein: The driven frame is in a U-shape, and the tensioning frame can be placed inside the U-shaped driven frame.

9. A four-wheel capping machine for milk powder packaging according to claim 1, characterized in that: The synchronous belt bypasses the output shaft of a motor, and the motor drives the synchronous belt to move.

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