Corner conveying mechanism

Abstract

The utility model relates to a corner conveying mechanism which is mainly used for conveying a printed circuit board (PCB), the conveying mechanism is of a multi-layer design, the bottom layer is a fixing frame, a lifting mechanism is arranged on the fixing frame, the middle layer is a bracket, the bracket is arranged on the lifting mechanism, the top layer is a guide frame, and the guide frame is arranged on the bracket. A plurality of conveying belt sets and electric rollers are arranged in the bracket, and direct-current electric rollers and poly V-belt rollers are arranged in the guide frame. The mechanism is convenient to install, the machine body is light and thin, the occupied space in the height direction is small, and the mechanism has great advantages in a multi-layer conveying system.

Description

Technical Field

[0001] The utility model relates to the field of machinery, and particularly relates to a corner conveying mechanism.

Background Art

[0002] The conveying mechanism is an important component on mechanical equipment, generally divided into chain conveying and gear conveying. Traditional chain drives require frequent cleaning and lubrication, generate additional vibrations, have a sense of jerk, and are not suitable for rapid reverse transmission when turning corners. Traditional gear drives are not smooth enough, produce noise, cannot achieve stepless speed change, require high manufacturing and installation precision, have a high cost, and are not suitable for use in transmissions with a large axle distance.

[0003] Therefore, this paper proposes a new type of corner conveying mechanism, which can effectively improve the deficiencies existing in the above two traditional methods, and the mechanism is designed simply and conveniently, which can effectively reduce the assembly time.

Content of the Utility Model

[0004] To solve the above problems, a corner conveying mechanism is proposed; the mechanism is designed with a multi-layer structure. The bottom layer is a fixed frame, and a lifting mechanism is provided on the fixed frame. The lifting mechanism includes an electric cam roller and a driven cam roller; the middle layer is a bracket, and the bracket is arranged on the lifting mechanism. A plurality of conveying belt groups and electric rollers are arranged in the bracket, and the electric rollers pass through the middle of the bottom of the conveying belt groups; the top layer is a guide frame, and the guide frame is arranged on the bracket; a plurality of DC electric rollers and multi-wedge belt rollers are arranged in the guide frame; the conveying belt groups are installed between two DC electric rollers and are driven by the electric rollers at the bottom at the same time. The conveying belt groups are fixed on the bracket at the same time to ensure the fixed position and synchronous lifting between them.

[0005] Further, a plurality of pairs of lifting guide shafts are provided on the fixed frame. The electric cam roller and the driven cam roller are installed in the middle of the lifting guide shafts. Cams are provided on the electric cam roller and the driven cam roller, and pins are provided on the cams. The pins are connected to roller connecting rods. It can make the mechanism synchronous when lifting and save an electric roller. The electric roller rotates 180 degrees and then reversely rotates to complete the lifting and lowering actions of the mechanism.

[0006] Further, the conveying belt group includes a mounting plate and a belt. The mounting plate is fixed on the bracket. A belt pressing plate is provided on the belt. A reverse belt pressing wheel is provided under the belt pressing plate. A tensioning screw is provided on the mounting plate. The tensioning screw includes a full-thread stud and a nut. The nut includes a front nut and a rear nut. The front nut is used for pre-tightening to prevent the rear nut from loosening.

[0007] Further, linear bearings, lifting wheels and guide plates are provided on the guide frame. The lifting wheels are arranged at the four corners of the guide plate and are in contact with the cam. During the rotation of the cam, the lifting wheels are driven. The linear bearings are installed on the lifting guide shafts.

[0008] Further, middle lifting wheels are provided at the four corners of the bracket. The middle lifting wheels are in contact with the cam. During the rotation of the cam, the middle lifting wheels are driven.

[0009] Further, the surface of the guide plate is lower than that of the DC motorized roller and the multi-wedge belt roller, which is convenient for the workpiece to be sent out from the side. This not only improves the working efficiency, but also reduces problems such as jamming and damage of the workpiece during transportation.

[0010] This corner conveying mechanism adopts a multi-layer structure design, which not only makes the structure of the mechanism more compact, but also improves the diversity and flexibility of its functions. The cooperation of the electric cam roller and the driven cam roller enables efficient driving. The design of the middle lifting wheels and the lifting wheels enables the mechanism to maintain a stable operating state even when bearing a large load. The belt pressing plate and the reverse belt pressing wheel of the conveyor belt group and other components are composed and adjusted by the tensioning screw to ensure the tension and stability of the belt. These advantages make the mechanism have a wide application prospect in the field of industrial automation.

Description of the Drawings

[0011] Figure 1 is the three-dimensional structure diagram of the present utility model;

[0012] Figure 2 is the bottom structure diagram of the present utility model;

[0013] Figure 3 is the middle-layer structure diagram of the present utility model;

[0014] Figure 4 is the schematic diagram of the pin and the cam connection of the present utility model;

[0015] Figure 5 is the connection diagram of the cam, the middle lifting wheel and the lifting wheel of the present utility model;

[0016] Figure 6 is the bottom structure diagram of the middle layer of the present utility model.

Specific Embodiments

[0017] In order to make the purpose, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0018] As Figure 1-6As shown in the figure, a corner conveyor mechanism; the mechanism is designed with a multi-layer structure. The bottom layer is a fixed frame 1, and a lifting mechanism 11 is provided on the fixed frame 1. The lifting mechanism 11 includes an electric cam roller 12 and a driven cam roller 13. A plurality of pairs of lifting guide shafts 14 are provided on the fixed frame 1. The electric cam roller 12 and the driven cam roller 13 are installed in the middle of the lifting guide shafts 14. Cams 15 are provided on the electric cam roller 12 and the driven cam roller 13, and pins 16 are provided on the cams 15. The pins 16 are connected to the roller link 17. The roller link 17 can ensure the synchronism of the mechanism during lifting and save an electric roller. The electric cam roller 12 rotates 180 degrees and then reversely rotates to complete the lifting and lowering actions of the mechanism.

[0019] The bottom layer design is driven by a DC electric cam roller 12 with a cam 15. During the lifting process, the height of the conveying surface of the workpiece is not changed, that is, the corner conveyor mechanism does not need to do work on the workpiece to be conveyed, but only needs to do work on the conveying functional component body. While reducing the power of the lifting drive element and saving energy, it also keeps the nominal heights of the horizontal and vertical conveying lines consistent, thereby making the layout of the lifting and transferring more flexible and free. At the same time, replacing the driven cam roller 13 with an electric cam roller 12, that is, the lifting mechanism is driven by two identical electric cam rollers, the intermediate roller link 17 can be cancelled, and the overall height can be reduced by about 30 mm.

[0020] The middle layer is a bracket 2. The bracket 2 is provided on the lifting mechanism 11. A plurality of conveying belt groups 21 and electric rollers 22 are provided in the bracket 2. The electric roller 22 passes through the middle of the bottom of the conveying belt group 21. The conveying belt group 21 includes a mounting plate 23 and a belt 24. The mounting plate 23 is fixed on the bracket 2. A belt pressing plate 25 is provided on the belt 24, and a reverse belt pressing wheel 26 is provided under the belt pressing plate 25. A pair of tensioning screws 27 are provided on the mounting plate 23. The tensioning screw 27 includes a full-thread stud 28 and a nut 29. The nut 29 includes a front nut 29a and a rear nut 29b. The front nut 29a is used for pre-tightening to prevent the rear nut 29b from loosening.

[0021] Among them, the conveying belt group 21 is installed between two DC electric rollers 31 and is driven by the electric roller 22 at the bottom at the same time. The conveying belt group 21 is fixed on the bracket 2 at the same time to ensure the fixed position and synchronous lifting between each other.

[0022] Among them, middle lifting wheels 20 are provided at the four corners of the bracket 2. The middle lifting wheels 20 are connected to the convex 15 wheels at the bottom layer, and the cams 15 drive the middle lifting wheels 20 during rotation.

[0023] The middle - layer belt conveying components are 5 groups. To prevent the belt 24 from slipping out, two reverse belt pressing wheels 26 are set on each belt. At the same time, the belt pulleys all have tiny flanges. The 5 groups of belt conveying components are fixed on a belt conveying bracket 2 at the same time to ensure the fixed position and synchronous lifting among them. The design of the belt pressing plate 25 and the reverse belt pressing wheels 26 also helps to prevent the belt from shifting or sliding during the conveying process.

[0024] The top layer is a guiding frame 3. The guiding frame 3 is arranged on the bracket 2. Inside the guiding frame 3, there are multiple DC motorized rollers 31 and multi - wedge belt rollers 32. On the guiding frame 3, there are linear bearings 33, lifting wheels 34 and guiding plates 35. The lifting wheels 34 are arranged at the four corners of the guiding plate 35 and are in contact with the cams 15 on the bottom layer. During the rotation of the cams 15, the cams 15 drive the lifting wheels 34. The linear bearings 33 are installed on the lifting guiding shafts 14 on the bottom layer. The combination of the two realizes the lifting and lowering of the belt conveying mechanism.

[0025] Among them, the surface of the guiding plate 3 is lower than that of the DC motorized rollers 31 and the multi - wedge belt rollers 32, which is convenient for the workpieces to be sent out from the side. This not only improves the work efficiency but also reduces problems such as jamming and damage of the workpieces during the conveying process.

[0026] The 8 roller conveying components (DC motorized rollers 31 and multi - wedge belt rollers 32) on the top layer are divided into two groups. Cooperating with the linear bearings 33 on the roller conveying components and the belt conveying components, the vertical movement guiding of these two components is realized, and the smoothness during the lifting process is maintained. The roller conveying components use DC motorized rollers 31 with a diameter of 50 mm to drive five non - powered multi - wedge belt rollers 32. The DC motorized rollers 31 are arranged near the middle position, and the roller spacing is 100 mm. The 2PJ336 multi - wedge belt drive is selected, and the operation is stable and noiseless. The upper surfaces of the roller mounting plates on both sides are lower than the upper bus of the rollers, which is convenient for the workpieces to be sent out from the side. Limited by the diameter and output power of the motorized rollers, there are certain restrictions on the weight of the workpieces to be conveyed, and it is more suitable for load plates within 20 KG.

[0027] This corner conveying mechanism is very practical in the carrier plate conveying system of the PCB docking equipment. At the same time, due to its thin and light body and small space occupied in the height direction (the total height is about 232 mm), it has more advantages in the multi - layer conveying system. The layer spacing of the conveying line can be further compressed, thereby reducing the overall height of the multi - layer conveying line.

[0028] When this mechanism is working, the PCB board enters from the front end of the top layer guiding frame 3 and directly exits from the rear end after being conveyed by the rolling of the DC electric roller 31 and the multi-wedge belt roller 32. An optoelectronic sensor is designed on the guiding plate 35. When the PCB board is conveyed to the specified position and is sensed by the optoelectronic sensor, the electric cam roller 12 and the driven cam roller 13 on the lifting mechanism 11 rise, and the bracket 2 lifts the belt conveying group 21 to the same horizontal plane as the top layer. The belt pulley on the belt conveying group 21 starts to convey, thus changing the conveying direction of the PCB board, and a 90-degree corner conveying can be achieved without the rotation of the mechanism components.

[0029] 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 within the protection scope of the present invention.

Claims

1. A corner conveying mechanism, characterized in that: It includes a multi-layer structure design, the bottom layer is a fixed frame, the fixed frame is provided with a lifting mechanism, the lifting mechanism includes an electric cam roller and a driven cam roller; the middle layer is a bracket, the bracket is arranged on the lifting mechanism, a plurality of conveyor belt groups and electric rollers are arranged in the bracket, and the electric roller passes through the middle of the bottom of the conveyor belt group; the top layer is a guide frame, the guide frame is arranged on the bracket; a plurality of DC electric rollers and multi-V belt rollers are arranged in the guide frame, and the conveyor belt group is installed between two DC electric rollers.

2. A corner conveying mechanism according to claim 1, characterized in that: The fixed frame is provided with a plurality of pairs of lifting guide shafts, the electric cam roller and the driven cam roller are installed in the middle of the lifting guide shafts, the electric cam roller and the driven cam roller are provided with cams, and a roller connecting rod is provided under the cam.

3. The corner conveying mechanism according to claim 1, characterized in that: The conveyor belt assembly includes a mounting plate and a belt. The mounting plate is fixed on a bracket. A belt pressure plate is provided on the belt. A reverse belt pressure wheel is provided under the belt pressure plate. A tensioning screw is provided on the mounting plate. The tensioning screw includes a full-thread stud and a nut.

4. The corner conveying mechanism according to claim 1, characterized in that: The guide frame is provided with linear bearings, lifting wheels and guide plates. The lifting wheels are arranged at the four corners of the guide plate and connected with cams. The cams drive the lifting wheels during rotation. The linear bearings are installed on the lifting guide shafts.

5. The corner conveying mechanism according to claim 1, characterized in that: The four corners of the bracket are provided with middle lifting wheels, and the middle lifting wheels are connected with cams, and the cams drive the middle lifting wheels during the rotation process.

6. The corner conveying mechanism according to claim 2, characterized in that: The cam is provided with a pin, and the pin is connected to the roller connecting rod.

7. The corner conveying mechanism according to claim 4, characterized in that: The surface of the guide plate is lower than the DC motor roller and the multi-V belt roller, so that the workpiece can be easily sent out from the side.

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