A new type of double-station automatic unloading device for suspension conveyors

Abstract

The utility model discloses a novel double station automatic piece lowering device for suspension conveyor, the bottom of movable gantry trolley is installed with heavy double side groove wheel, and the movable gantry trolley is installed on the flat track through the heavy double side groove wheel, the driving cylinder is connected with the movable gantry trolley, is used for driving the trolley to carry out the linear reciprocating motion between the casting piece lowering station and the casting transfer station, the liftable workbench is installed on the movable gantry trolley, and the motorized roller way is arranged on the liftable workbench table top, and the pneumatic motor is connected with the motorized roller cylinder through the sprocket chain, is used for driving the roller cylinder rotation, and the control system includes PLC, solenoid control valve and photoelectric detection switch, is used for controlling the action sequence of driving cylinder, lifting cylinder and pneumatic motor. Effectively solved the automatic piece lowering and transfer conveying function between the casting from the suspension conveyor to the next process, and the device all adopted pneumatic control on the control, and is not sensitive to the requirement of working environment, and the working reliability is strong, and the equipment failure rate is extremely low.

Description

Technical Field

[0001] This utility model relates to a dual-station automatic unloading device, and in particular to a novel dual-station automatic unloading device for a suspended conveyor. Background Technology

[0002] In industries such as machinery manufacturing and automotive parts, overhead conveyors are widely used for workpiece handling, painting, and cooling processes due to their advantages such as small footprint, flexible conveying paths, and continuous transport capabilities. The workpiece unloading stage is a crucial component of the overhead conveyor system, directly impacting overall production efficiency. Currently, traditional overhead conveyor unloading methods are mainly divided into two types: manual unloading and single-station automatic unloading. Manual unloading requires operators to remove workpieces from the overhead conveyor rack at a designated station and transfer them to subsequent processes. This is not only labor-intensive and costly, but also inefficient due to limitations in operator speed, making it difficult to adapt to high-paced, large-scale production. While single-station automatic unloading devices can automatically receive and transport workpieces, they only have one workstation. After unloading and transferring the current workpiece, the device must wait for it to reset before unloading the next workpiece, resulting in work gaps that limit unloading efficiency. Especially in scenarios with high workpiece transport frequency, workpiece accumulation can easily occur, affecting the overall production line's efficiency. Furthermore, some single-station automatic unloading devices have structural design deficiencies: for example, poor stability during table lifting and lowering, easily causing workpieces to shake or even fall; insufficient friction between the conveyor rollers and the workpiece, easily causing workpiece slippage and affecting transport stability; and relatively simple control logic, lacking precise detection of workpiece position and coordinated control of movements, making it difficult to adapt to the unloading requirements of workpieces of different sizes and weights. Therefore, developing a dual-station automatic unloading device capable of continuous unloading, high stability, and strong adaptability is key to solving the pain points of existing technologies. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a new type of automatic unloading device for a suspended conveyor with two workstations.

[0004] The objective of this utility model is achieved through the following technical solution: a novel dual-station automatic unloading device for overhead conveyors, comprising: The mobile test trolley is equipped with heavy-duty double-sided grooved wheels at its bottom; The straight track is a square steel guide rail, and the moving trolley is mounted on the straight track via heavy-duty double-sided grooved wheels; The drive cylinder is connected to the mobile trolley and is used to drive the trolley to perform back-and-forth linear reciprocating motion between the casting unloading station and the casting transfer station. The liftable worktable is installed on a mobile trolley and is driven to lift by a lifting cylinder. The liftable worktable is equipped with four guide rods and corresponding guide rod seats. The bottom of the guide rods is slidably installed in the guide rod seats, and linear guide bearings are installed on the guide rod seats. The motorized roller conveyor is arranged on a liftable worktable and includes multiple motorized rollers; A pneumatic motor, connected to a motorized roller via a sprocket and chain, is used to drive the roller to rotate. The control system, including a PLC, solenoid control valves, and photoelectric detection switches, is used to control the sequence of actions of the drive cylinder, lifting cylinder, and pneumatic motor.

[0005] Optionally, two liftable worktables are provided, with a groove between the two liftable worktables.

[0006] Optionally, dead stops are provided at both ends of the straight track.

[0007] Optionally, the motorized rollers are interconnected by sprockets and chains.

[0008] Optionally, the guide rod seat is fixed on the moving platform trolley, and the guide rod is fitted with a linear bearing.

[0009] Optionally, the liftable worktable is also equipped with limit bars at both ends.

[0010] Optionally, a shock-absorbing pad is provided between the pneumatic motor and the top of the liftable worktable frame.

[0011] Optionally, the surface of the motorized roller is covered with a wear-resistant rubber layer, the thickness of which is 3-5mm.

[0012] Optionally, the photoelectric detection switch uses a diffuse reflection photoelectric sensor, and the detection distance of the photoelectric detection switch can be adjusted within a range of 0.5-3m.

[0013] This utility model has the following advantages: 1. It effectively solves the problem of automatic unloading and transfer of castings from the overhead conveyor to the next process. The device adopts pneumatic control, is not sensitive to the working environment, has high reliability, and has an extremely low failure rate. 2. This device enables the entire rust prevention and control system to be put back into use, realizing the recycling of residual rust prevention water in the inner cavity of the casting, improving the cleanliness of the casting, reducing environmental pollution caused by rust prevention water leakage during casting transfer and pollution of machine tool coolant during processing, and reducing production costs. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 Figure 3 This is a schematic diagram of the online operation of this utility model. In the diagram, 1-sprocket, 2-motorized roller, 3-bearing, 4-pneumatic motor, 5-lifting cylinder, 6-lifting worktable, 7-guide rod, 8-linear bearing, 9-guide rod seat, 10-drive cylinder, 11-dead stop, 12-support channel steel, 13-square steel guide rail, 14-moving trolley, 15-double-sided grooved wheel, 16-hinged joint, 17-base, 18-chain, 19-limiting rod. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0016] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0017] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0018] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0019] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0020] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] like Figure 1 and Figure 2As shown, a novel dual-station automatic unloading device for a suspended conveyor includes: a mobile trolley 14, a straight track, a drive cylinder 10, a liftable worktable 6, a motorized roller conveyor, a pneumatic motor 4, and a control system. In this embodiment, the bottom of the mobile trolley 14 is equipped with heavy-duty double-sided grooved wheels 15. Specifically, the frame of the mobile trolley 14 is welded from structural steel, possessing high strength and high rigidity, and can withstand the impact of the workpiece weight. Four sets of heavy-duty double-sided grooved wheel 15 mechanisms are installed at the bottom of the mobile trolley 14. These heavy-duty double-sided grooved wheel 15 mechanisms are integrated with... The trolley 14 is fitted with a straight track to ensure its stability during movement. A hinge joint 16 is installed at the rear end of the trolley 14. One end of the drive cylinder 10 in the drive assembly is connected to the hinge joint 16, and the other end is fixed to the base 17 of the straight track via a mounting base 17. The drive cylinder 10 drives the trolley 14 to reciprocate linearly along the straight track, enabling rapid switching between the casting unloading station and the transfer and conveying station. The trolley 14 is assembled using a 50×50×5mm... Angle steel is welded to form the frame of the mobile platform trolley 14, with dimensions of 2m × 1.2m × 0.5m. A set of heavy-duty double-sided grooved wheels 15 (model HC-200) are installed at each of the four corners of the bottom of the frame. The grooved wheels are compatible with the square steel of the straight track to ensure smooth movement of the trolley. A hinge joint 16 is welded to the rear end of the trolley frame. A cylinder (model SC80×500) is selected as the drive cylinder 10 for the mobile platform trolley 14. One end of the cylinder is connected to the hinge joint 16 via a pin, and the other end is fixed to the support channel steel 12 of the straight track via a mounting base 17. A guardrail made of Φ16mm round steel is welded to the outside of the trolley frame. The guardrail height is set at 90cm, and the spacing between adjacent round steel bars is 15cm.

[0022] In this embodiment, the straight track is a square steel guide rail 13. The mobile trolley 14 is installed on the straight track via heavy-duty double-sided grooved wheels 15, and is made of square steel. Supporting channel steel 12 is installed at the bottom of the square steel. The supporting channel steel 12 is fixedly connected to the ground foundation by expansion bolts. The spacing of the supporting channel steel 12 is adapted to the length of the square steel to ensure the load-bearing stability of the straight track. Dead stops 11 are installed at both ends of the straight track to limit the movement limit position of the mobile trolley 14 and prevent overtravel. The two ends of the straight track correspond to the casting unloading station and the casting transfer and conveying station on the casting overhead conveyor line, respectively, providing a reference for the precise station switching of the mobile trolley 14. During installation, 10# square steel is selected as the main body of the straight track, and the length is set to 5m according to the distance between the unloading station and the transfer and conveying station of the overhead conveyor. A 10# supporting channel steel 12 is installed at every 1.5m at the bottom of the square steel, and the supporting channel steel 12 is connected by M16 bolts. The expansion bolts are fixed to the ground foundation to ensure that the horizontal error of the straight track does not exceed 0.5mm / m; 10mm thick steel plates are welded to both ends of the straight track as dead stops 11, and rubber buffer pads are pasted on the inside of the dead stops 11 to avoid rigid impact when the moving platform trolley 14 is hit.

[0023] In this embodiment, the drive cylinder 10 is connected to the mobile trolley 14 and is used to drive the trolley to perform back-and-forth linear reciprocating motion between the casting unloading station and the casting transfer station. A liftable worktable 6 is mounted on the mobile trolley 14 and is driven to rise and fall by the lifting cylinder 5. The liftable worktable 6 has four guide rods 7 and corresponding guide rod seats 9. The bottom of the guide rods 7 is slidably mounted in the guide rod seats 9, and linear guide bearings 3 are installed on the guide rod seats 9. Two liftable worktables 6 are mounted on the mobile trolley 14, forming a dual-station structure that allows for alternating operations. The frame of each liftable worktable 6 is welded from structural steel, with a central opening for the passage of a suspension conveyor. The grooves prevent interference between the worktable and the hanging frame during lifting. A lifting drive cylinder 10 is connected to the center of the bottom of the liftable worktable 6. The lifting drive cylinder 10 is fixed on the moving platform trolley 14 to provide power for the lifting of the worktable. Four guide rods 7 are installed on the four sides of the bottom of the worktable. The guide rods 7 are adapted to the guide rod seats 9 fixed on the moving platform trolley 14. Linear bearings 83 are installed on the guide rod seats 9. The guide rods 7 and the linear bearings 83 cooperate to ensure the straightness and stability of the worktable when it moves up and down along the guide rods 7. Limit rods 19 are also installed at both ends of the liftable worktable 6 to limit the lowest position of the worktable descent and ensure the consistency of the lifting actions of the two worktables. In this embodiment, a motorized roller conveyor is arranged on the platform of the liftable worktable 6, including multiple motorized rollers 2. Further, the motorized roller conveyor is installed on the top of the frame of the liftable worktable 6, including at least seven motorized rollers 2, bearings 3, and sprockets 1. The motorized rollers 2 are installed on the top of the worktable frame via bearings 3, and adjacent rollers are connected by a sprocket and chain drive. A pneumatic motor 4 in the drive assembly is installed on the top of the worktable frame. The sprocket 1 at the shaft end of the pneumatic motor 4 is connected to the sprocket 1 of the motorized roller 2 via a chain 18. After starting the pneumatic motor 4, it can drive the motorized rollers 2 to roll synchronously, realizing the transfer of workpieces. The surface of the motorized rollers 2 is covered with a 3-5mm thick wear-resistant rubber layer, which increases the friction between the rollers and the workpiece, preventing slippage. During installation, seven Φ50mm stainless steel motorized rollers 2 are installed on the top of each liftable worktable 6 frame via bearing seats 3, with a roller spacing of 20cm. Model 08B is installed on the shaft ends of adjacent rollers. The sprocket 1 is connected to the adjacent rollers via chain 18; an AM-20 pneumatic motor 4 is installed on one side of the top of the workbench frame, and a sprocket 1 of the same model is installed on the shaft end of the pneumatic motor 4, which is connected to the sprocket 1 of the outermost motor roller 2 via chain 18; a 4mm thick wear-resistant rubber layer is wrapped on the surface of the motor roller 2, and the surface of the rubber layer is treated with anti-slip texture; a 5mm thick nitrile rubber shock-absorbing pad is pasted between the pneumatic motor 4 and the workbench frame.

[0024] In this embodiment, the control system includes a PLC controller, an electromagnetic control valve, and a photoelectric detection switch, which are used to control the action sequence of the drive cylinder 10, the lifting cylinder 5, and the pneumatic motor 4. The drive cylinder 10, the lifting drive cylinder 10, and the pneumatic motor 4 of the moving trolley 14 are all electrically connected to the PLC controller through the electromagnetic control valve, and the PLC controller controls the action sequence of each drive component. The photoelectric detection switch uses a diffuse reflection photoelectric sensor, which is installed at a designated position on the overhead conveyor. The detection distance can be adjusted within the range of 0.5-3m, which can accurately detect whether the workpiece has reached the next position and transmit the signal to the PLC controller.

[0025] In this embodiment, a shock-absorbing pad is provided between the pneumatic motor 4 and the top of the frame of the liftable worktable 6. The shock-absorbing pad is made of rubber and is used to reduce the vibration generated by the pneumatic motor 4 during operation and transmit it to the liftable worktable 6.

[0026] The working process of this utility model is as follows: When using it, as follows... Figure 3As shown, the mechanism is installed on the overhead conveyor chain, and its function is to remove castings conveyed on the overhead conveyor and transfer them to the next process. When the conveyor frame transports the casting to the pick-up position, the photoelectric switch senses the position signal, and the lifting drive cylinder 10 is activated, raising the liftable worktable 6. The motorized roller 2 mounted on the top of the liftable worktable 6 lifts the casting from the conveyor frame. At this time, the moving trolley 14 is activated by the drive cylinder 10, pushing the moving trolley 14 forward in the direction of the conveyor, so that the casting is completely separated from the frame. When the trolley reaches the conveyor transfer station, the motorized roller 2 drives the pneumatic motor 4 to transfer the casting to the motorized roller conveyor of the next process. After the casting is separated from the motorized roller 2, the drive pneumatic motor 4 stops working, and the lifting drive cylinder 10 lowers the liftable worktable 6. After returning to its original position, the moving trolley 14 drives cylinder 10 to return to its original position to retrieve and unload the part, completing one work cycle. Assuming 0.2 kg of rust inhibitor is recovered from each casting, and with an annual production of 300,000 cylinder castings, a rust inhibitor cost of 25.73 yuan / kg, and labor costs of 80,000 yuan / year, the company can save the following annual production costs: 0.2 * 300,000 * 25.73 + 80,000 = 1,623,800 yuan = 1,623,800 yuan. Simultaneously, it revitalizes over 300,000 yuan of equipment investment, reduces the contamination of machine tool coolant by rust inhibitor during casting processing, extends the coolant's lifespan, and reduces rust inhibitor costs by over 100,000 yuan annually, thus lowering processing costs.

[0027] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A new type of double-station automatic unloading device for suspended conveyors, characterized in that: include: The mobile test trolley is equipped with heavy-duty double-sided grooved wheels at its bottom; The straight track is a square steel guide rail, and the moving trolley is mounted on the straight track via heavy-duty double-sided grooved wheels; A drive cylinder is connected to the mobile trolley and is used to drive the trolley to perform a linear reciprocating motion between the casting unloading station and the casting transfer station. A liftable worktable is installed on the mobile platform trolley and is driven to lift by a lifting cylinder. The liftable worktable is provided with four guide rods and corresponding guide rod seats. The bottom of the guide rods is slidably installed in the guide rod seats, and linear guide bearings are installed on the guide rod seats. A motorized roller conveyor is arranged on the liftable worktable surface and includes multiple motorized rollers; A pneumatic motor, connected to the motorized roller via a sprocket and chain, is used to drive the roller to rotate; The control system, including a PLC, solenoid control valves, and photoelectric detection switches, is used to control the sequence of actions of the drive cylinder, lifting cylinder, and pneumatic motor.

2. A novel double-station automatic unloading device for a suspension conveyor according to claim 1, characterized in that: The liftable worktable is provided in two parts, and a groove is provided between the two liftable worktables.

3. A novel double-station automatic unloading device for a suspension conveyor according to claim 1, characterized in that: The straight track is equipped with dead stops at both ends.

4. A novel double-station automatic unloading device for a suspension conveyor according to claim 1, characterized in that: The motorized rollers are interconnected by sprockets and chains.

5. A novel double-station automatic unloading device for a suspension conveyor according to claim 1, characterized in that: The guide rod seat is fixed on the moving platform trolley, and the guide rod is engaged with the linear bearing.

6. A novel dual station automatic part unloading device for a suspended conveyor as claimed in claim 1, wherein: The liftable worktable is also equipped with limit rods at both ends.

7. A novel double-station automatic unloading device for a suspension conveyor according to claim 1, characterized in that: A shock-absorbing pad is provided between the pneumatic motor and the top of the liftable worktable frame.

8. A novel double-station automatic unloading device for a suspension conveyor according to claim 1, characterized in that: The surface of the motorized roller is covered with a wear-resistant rubber layer, the thickness of which is 3-5mm.

9. A novel double station automatic part unloading device for a suspended conveyor as claimed in claim 1, wherein: The photoelectric detection switch uses a diffuse reflection photoelectric sensor, and the detection distance of the photoelectric detection switch is adjustable from 0.5 to 3m.

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