Counting mechanism of straw packaging machine

Abstract

The utility model discloses a counting mechanism of a straw packaging machine. The counting mechanism comprises a cam, a bearing, a first connecting rod, a second connecting rod, a third connecting rod, a striker plate and a rotating shaft, the cam is driven by the cam shaft to rotate, the bearing is rotationally mounted above the cam through a pin shaft A, and the outer ring of the bearing is rotationally connected with the cam; the hinge pin A is fixedly installed in the center of the first connecting rod, the rear end of the first connecting rod is rotatably installed on a side plate of the packaging machine, the front end of the first connecting rod is hinged to the second connecting rod through the hinge pin B, the other end of the second connecting rod is hinged to the third connecting rod through the hinge pin C, and the other end of the third connecting rod is fixedly connected with the rotating shaft which is rotatably installed below a discharging hopper of the packaging machine. The material blocking plate is arranged on the rotating shaft and located on the front side of the discharging channel, and the material blocking plate is fixedly installed in the center of the rotating shaft and driven by the rotating shaft to overturn, intercept or release the suction pipes arranged in the discharging channel. The counting device is simple in structure and high in reliability, and the counting accuracy is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of straw packaging equipment, in particular to a counting mechanism of a straw packaging machine. Background Art

[0002] The straw packaging machine is a mechanical device that packages single straws into packaging bags according to the number of straws required by customers. The number of straws packaged is determined by a counting mechanism. The existing counting mechanism is mainly composed of a cylinder and a baffle. The cylinder's telescopic movement is used to drive the baffle to perform periodic material blocking actions. By extending or shortening the cylinder's retention time in the retracted state and matching the conveying speed of the conveyor belt, the number of straws that need to be packaged can be intercepted. The mechanism is easy to control and has strong practicality, but the piston rod of the cylinder is prone to deformation due to frequent use, and the air pipe joint is prone to air leakage, which reduces its reliability and affects its counting accuracy. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a counting mechanism for a straw packaging machine.

[0004] The technical solution adopted by the utility model is:

[0005] A counting mechanism for a straw packaging machine comprises a cam, a bearing, a first connecting rod, a second connecting rod, a third connecting rod, a material baffle plate and a rotating shaft; the cam is driven to rotate by a cam shaft, the bearing is rotatably mounted above the cam via a pin A, and the outer ring of the bearing is rotatably connected to the cam; the pin A is fixedly mounted at the center of the first connecting rod, the rear end of the first connecting rod is rotatably mounted on a side plate of the packaging machine, the front end is hinged to the second connecting rod via a pin B, the other end of the second connecting rod is hinged to the third connecting rod via a pin C, the other end of the third connecting rod is fixedly connected to the rotating shaft, the rotating shaft is rotatably mounted below a feeding hopper of the packaging machine and is located at the front side of a feeding channel, the material baffle plate is fixedly mounted at the center of the rotating shaft, and is driven to flip by the rotating shaft to intercept or release the straws arranged in the feeding channel.

[0006] Furthermore, the baffle plate is composed of a straight plate at the top and an inclined plate at the bottom. A waist-shaped hole is opened on the straight plate along its length direction. The lower end of the inclined plate is bent toward one side of the lower material channel and a sharp corner is set at its end.

[0007] Furthermore, the baffle plate is fastened to the rotating shaft by bolts passing through the waist-shaped holes of the baffle plate.

[0008] Furthermore, a return spring is connected to the lower side of the front end of the first connecting rod, one end of the return spring is fixed to the side plate of the packaging machine, and the other end is fixed to the bottom of the first connecting rod.

[0009] Furthermore, two ends of the return spring are respectively hooked on the side plate of the packaging machine and the first connecting rod.

[0010] Furthermore, both ends of the rotating shaft are rotatably mounted on a rotating shaft mounting plate through bearings, and the rotating shaft mounting plate is fixed on a side plate of the packaging machine.

[0011] The beneficial effects of the utility model are as follows: the cam-connecting rod mechanism is used to drive the flipping movement of the baffle plate to realize the counting function. The cam-connecting rod mechanism has a simple structure, high precision, and is stable and reliable, and is not prone to malfunction, thereby improving the accuracy of counting. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the installation structure of the counting mechanism of this application.

[0013] Figure 2 Schematic diagram of the baffle plate structure of the counting mechanism. DETAILED DESCRIPTION

[0014] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings and a preferred implementation manner.

[0015] See also Figure 1-Figure 2 This embodiment provides a counting mechanism for a straw packaging machine, including a cam 1, a bearing 2, a first connecting rod 3, a second connecting rod 4, a third connecting rod 5, a material blocking plate 6 and a rotating shaft 7.

[0016] The cam 1 is rotatably mounted on the outer side of the packaging machine side plate 22 through the camshaft 101. The camshaft 101 is connected to the power device to drive the cam to rotate. The bearing 2 is rotatably mounted above the cam 1 through the pin A and is in rolling contact with the cam contour line. The first connecting rod 3 is horizontally mounted above the cam 1 and its middle part is connected to the bearing 2 through the pin A, that is, the pin A passes through the center of the first connecting rod 3 to connect the bearing 2, and the inner ring of the bearing is connected to the pin A by interference fit. The rear end of the first connecting rod 3 is rotatably mounted on the packaging machine side plate 22 through the support rod, and the front end is hinged to the second connecting rod 4 through the pin B. The front end of the second connecting rod 4 is hinged to the third connecting rod 5 through the pin C. The front end of the third connecting rod 5 is fixedly connected to the rotating shaft 7. The rotating shaft 7 is rotatably mounted below the packaging machine feed hopper 20 through the rotating shaft mounting plate 23 and is located at the front side of the feed channel 21; the material blocking plate 6 is fixedly mounted at the center of the rotating shaft 7.

[0017] In specific implementation, there are two rotating shaft mounting plates 23, which are respectively fixed on the two packaging machine side plates 22 of the packaging machine. The two ends of the rotating shaft 7 are rotatably mounted on the rotating shaft mounting plates 23 through bearings, and the rotation is more flexible. The setting of the rotating shaft 7 allows the present application to use a set of cam-link mechanism to control the movement of the baffle plate. The center of the baffle plate 6 is provided with a waist-shaped hole 61 along its length direction, and the baffle plate is fastened to the rotating shaft 7 by bolts passing through its waist-shaped hole 61. The setting of the waist-shaped hole 61 can adjust the installation height of the baffle plate, thereby adjusting the number of counts.

[0018] In this embodiment, the baffle plate 6 is composed of an upper straight plate and a lower inclined plate, a waist-shaped hole 61 is provided on the straight plate, and the lower end of the inclined plate is bent toward one side of the lower material channel and a sharp corner 62 is provided at the end. The sharp corner facilitates the baffle plate to be inserted into the gap between two adjacent straws, making the counting more accurate.

[0019] How this application works is:

[0020] See also Figure 1 , the cam 1 rotates clockwise, pushing the first connecting rod 3 to rotate upward around its supporting axis, and the first connecting rod pulls the rotating shaft 7 to rotate downward through the second connecting rod and the third connecting rod, and the rotating shaft drives the baffle plate 6 to flip downward; when the cam 1 moves to the highest position point, the lower end of the baffle plate 6 is just inserted into the gap between two adjacent straws arranged in the feeding channel 21, separating the straws into two parts, and the straws on the lower side of the baffle plate 6 are the counted straws, which are transported to the next process through the conveying device; then, the cam 1 continues to rotate, and when the cam rotates from the highest position point to the lowest position point, the first connecting rod 3 rotates downward around its supporting rod under the action of gravity, and pulls the rotating shaft 7 to rotate downward through the second connecting rod and the third connecting rod, and the rotating shaft drives the baffle plate 6 to flip upward, and the straws on the upper side of the baffle plate 6 are released and supported on the rubbing board at the bottom of the feeding channel 21, and the rubbing board is in a retracted state when the counted straws fall.

[0021] The counting principle is: the number of straws continuously arranged in the feeding channel 21 is determined by the length L of the feeding channel and the diameter D of the straws, that is, the number of straws N = L / D; therefore, the number of dropped straws, that is, the number of packaging straws, can be calculated by controlling the height of the lower end of the baffle plate 6 inserted into the feeding channel.

[0022] In other embodiments, the lower side of the front end of the first connecting rod 3 is connected to the return spring 8, one end of the return spring 8 is fixed to the packaging machine side plate 22, and the other end is fixed to the bottom of the first connecting rod 3. Preferably, the two ends of the return spring 8 are hooked on the packaging machine side plate 22 and the first connecting rod 3, respectively, for easy replacement.

[0023] When the baffle plate 6 turns downward to block the material, the return spring 8 is stretched, and when the baffle plate 6 turns upward to release the straw, the return spring 8 returns to the initial position. The setting of the return spring is conducive to the first connecting rod 3 returning to the initial position, that is, the lowest point of the cam profile contacts the bearing 2, further ensuring the accuracy of the counting.

[0024] The above is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention, and these improvements and modifications are also within the protection scope of the present invention.

Claims

1. A counting mechanism for a straw packaging machine, characterized in that: It includes a cam, a bearing, a first connecting rod, a second connecting rod, a third connecting rod, a material baffle plate and a rotating shaft; the cam is driven to rotate by the camshaft, the bearing is rotatably installed above the cam through a pin A, and the outer ring of the bearing is rotatably connected to the cam; the pin A is fixedly installed at the center of the first connecting rod, the rear end of the first connecting rod is rotatably installed on the side plate of the packaging machine, the front end is hinged to the second connecting rod through a pin B, the other end of the second connecting rod is hinged to the third connecting rod through a pin C, the other end of the third connecting rod is fixedly connected to the rotating shaft, the rotating shaft can be rotatably installed below the unloading hopper of the packaging machine and is located at the front side of the unloading channel, the material baffle plate is fixedly installed at the center of the rotating shaft, and is driven to flip by the rotating shaft to intercept or release the straws arranged in the unloading channel.

2. The counting mechanism of the straw packaging machine according to claim 1, characterized in that: The baffle plate is composed of a straight plate at the upper part and an inclined plate at the lower part. A waist-shaped hole is opened on the straight plate along its length direction. The lower end of the inclined plate is bent toward one side of the lower material channel and a sharp corner is arranged at the end thereof.

3. The counting mechanism of the straw packaging machine according to claim 2, characterized in that: The baffle plate is fastened to the rotating shaft by bolts passing through its waist-shaped holes.

4. The counting mechanism of the straw packaging machine according to claim 1, characterized in that: The lower side of the front end of the first connecting rod is connected to a return spring, one end of the return spring is fixed on the side plate of the packaging machine, and the other end is fixed on the bottom of the first connecting rod.

5. The counting mechanism of the straw packaging machine according to claim 4, characterized in that: The two ends of the return spring are respectively hooked on the side plate of the packaging machine and the first connecting rod.

6. The counting mechanism of the straw packaging machine according to claim 1, characterized in that: The two ends of the rotating shaft are rotatably mounted on the rotating shaft mounting plate through bearings, and the rotating shaft mounting plate is fixed on the side plate of the packaging machine.

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