Workpiece tray loading and unloading structure

Abstract

The utility model relates to the field of machining, and provides a workpiece tray loading and unloading structure which comprises a tray and a workbench, when the tray is machined, the tray is arranged on the workbench, the workpiece tray loading and unloading structure comprises a conveying belt, the conveying belt is located above the workbench, and an electromagnet and a control system are fixedly arranged below the conveying belt. A zero-point positioner and a jacking base air cylinder are arranged on the workbench, the bottom of the jacking base air cylinder is connected with a vent hole, an air cylinder ejector rod is slidably connected into the jacking base air cylinder, and a positioning pop rivet is arranged at the bottom of the tray. An electromagnet attracts a tray to the position below a conveying belt, an air cylinder ejector rod descends to place the tray on a workbench, a zero-point positioner conducts accurate locking, after machining is completed, an air cylinder ejects the tray to the position below the electromagnet, and a control system controls the electromagnet to convey the tray to the conveying belt. In the process, a large amount of labor cost is saved, and the clamping and disassembling time is greatly shortened.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of machining, especially to workpiece tray loading and unloading structure. BACKGROUND

[0002] In modern manufacturing industry, especially in the field of machining, the loading and unloading and positioning of workpiece tray are the key links affecting production efficiency and machining accuracy. The traditional workpiece tray loading and unloading method mainly relies on manual clamping. During machining, the operator needs to manually place the tray transported by the conveyor belt on the workbench and fix it through bolts, clamps and other tools. Each time the workpiece is replaced, the tool needs to be re-adjusted, resulting in a long clamping time, low production efficiency, and the traditional clamping method is difficult to integrate with the automatic production line, which cannot realize unmanned or less manned production, limiting the flexible production capacity of enterprises. Therefore, how to quickly load and unload the workpiece tray has become a problem. SUMMARY

[0003] The utility model solves the technical problem that a workpiece tray loading and unloading structure is provided to solve the problem of how to quickly load and unload the workpiece tray.

[0004] The utility model adopts the technical scheme that:

[0005] The workpiece tray loading and unloading structure comprises a tray and a workbench. The workbench is provided with a tray machining station above. The tray machining station comprises a conveyor belt. The conveyor belt is suspended above the workbench. The lower surface of the conveyor belt is fixedly provided with an electromagnet. The electromagnet is provided with a control system for controlling the suction force of the electromagnet. The electromagnet has a first station, a second station and a third station along the horizontal direction. The conveyor belt is provided with a driving device. The driving device drives the conveyor belt to reciprocate along the horizontal direction, so that the electromagnet switches between the first station, the second station and the third station. The second station is located above the tray machining station. The workbench is provided with a zero position locator and a lifting base cylinder at the tray machining station. The lifting base cylinder is slidably connected with a cylinder lifting rod. The bottom of the tray is provided with a positioning pull nail. The positioning pull nail can be inserted into the pull nail insertion hole of the zero position locator. The tray is detachably connected with the zero position locator through the positioning pull nail. The cylinder lifting rod can be extended from the lifting base cylinder and lift the tray to the lower surface of the electromagnet. The upper surface of the tray is provided with an electromagnet adsorption part.

[0006] Further, the positioning pull nail sidewall of the tray is provided with a steel ball groove. The inner sidewall of the pull nail insertion hole of the zero position locator is provided with a limiting groove. The limiting groove is rollingly connected with a steel ball. The limiting groove is provided with a reset structure. When the positioning pull nail at the bottom of the tray is inserted into the pull nail insertion hole, the steel ball is placed into the steel ball groove on the positioning pull nail sidewall through the reset structure and abuts against the positioning pull nail.

[0007] Further, the steel ball, the limiting groove and the reset structure are at least two, and a plurality of limiting grooves are symmetrically arranged on the inner side wall of the pull-in hole.

[0008] Further, the reset structure is a spring.

[0009] Further, the lifting cylinder cover plate is arranged on the workbench, and the lower surface of the lifting cylinder cover plate is fixedly connected with the top of the cylinder rod.

[0010] Further, the workbench is provided with at least two lifting base cylinders, and the number of the cylinder rods in the lifting base cylinders is correspondingly designed.

[0011] Further, the workbench is provided with at least two zero position locators, and the bottom of the tray is provided with a corresponding number of positioning pull-in holes.

[0012] The utility model discloses the beneficial effect is:

[0013] The utility model discloses a lifting cylinder cover plate is arranged on the workbench, and the lower surface of the lifting cylinder cover plate is fixedly connected with the top of the cylinder rod.

[0014] The design of the zero position locator enables the tray to be accurately positioned and fixed within a few seconds, and the operator only needs to push the tray into the positioning device and lock it. Compared with the traditional manual clamping method, the loading and unloading speed of the utility model is improved by several times, and it is especially suitable for multi-variety and small-batch production scenes.

[0015] The zero position locator adopts the design of steel ball, limiting groove and reset structure, which ensures that the repeated positioning accuracy can reach the micron level every time the tray is replaced. The steel ball is placed in the steel ball groove on the side wall of the positioning pull-in hole through the reset structure, and tightly abuts against the positioning pull-in hole, thereby ensuring the position consistency of the tray between different processes.

[0016] The workbench is provided with at least two lifting base cylinders, and the number of the cylinder rods in the lifting base cylinders is correspondingly designed, which can provide uniform and stable lifting force when the tray is disassembled, avoids the inclination or jamming of the tray, and reduces the possibility of failure. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application, the following will be a brief description of the drawings needed to use in the embodiments.

[0018] Figure 1 Figure is the structure diagram of the workpiece tray loading and unloading structure.

[0019] Figure 2 Figure is the structure diagram of the zero position locator.

[0020] In the figure, 1 is a tray, 2 is a workbench, 3 is a conveyor belt, 4 is a zero position locator, 5 is a lifting base cylinder, 6 is a cylinder lifting rod, 7 is a lifting cylinder cover plate, 41 is a steel ball, 42 is a limiting groove, and 43 is a reset structure. DETAILED DESCRIPTION

[0021] The present application will be further described below in conjunction with the drawings.

[0022] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application will be further described in detail below in conjunction with the drawings and embodiments, and it should be understood that the specific embodiments described below are only used to explain the present application and not used to limit the present application.

[0023] In the description of the present application, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "top", "bottom" and the like should be understood in a broad sense, and not used to limit the protection scope of the present application. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0024] The workpiece tray loading and unloading structure comprises a tray 1 and a workbench 2, a tray processing station is arranged above the workbench 2, and the tray processing station comprises a conveyor belt 3, the conveyor belt 3 is suspended above the workbench 2, an electromagnet is fixedly arranged on the lower surface of the conveyor belt 3, the electromagnet is provided with a control system for controlling the suction force of the electromagnet, the electromagnet has a first station, a second station and a third station in the horizontal direction, the conveyor belt 3 is provided with a driving device, the driving device drives the conveyor belt 3 to reciprocate in the horizontal direction, so that the electromagnet is switched between the first station, the second station and the third station, the second station is located above the tray processing station, the workbench 2 is provided with a zero position locator 4 and a lifting base cylinder 5 at the tray processing station, a cylinder lifting rod 6 is slidably connected in the lifting base cylinder 5, a positioning pull nail is arranged at the bottom of the tray 1, the positioning pull nail can be inserted into a pull nail insertion hole of the zero position locator 4, the tray 1 is detachably connected with the zero position locator 4 through the positioning pull nail, the cylinder lifting rod 6 can be extended from the lifting base cylinder 5 and lift the tray 1 to the lower surface of the electromagnet, and the upper surface of the tray 1 has an electromagnet adsorption part.

[0025] When pallet 1 is being processed, the control device attracts pallet 1 onto the electromagnet on the lower surface of the conveyor belt 3. The conveyor belt 3 is driven by the drive device to reciprocate horizontally, moving the electromagnet from the first station to the second station above the cylinder push rod 6. Then, the control system controls the electromagnet to release pallet 1 and place it on the cylinder push rod 6. At this time, the cylinder push rod 6 slowly descends into the lifting base cylinder 5, and pallet 1 is placed on the worktable 2. The bottom of pallet 1 is equipped with positioning rivets, which cooperate with the rivet insertion holes of the zero-point positioner 4 to achieve precise positioning and fixation of pallet 1. When pallet 1 is finished being processed, gas is introduced through the vent hole, and the cylinder push rod 6 is lifted from the bottom of the lifting base cylinder 5, sending pallet 1 to the area below the electromagnet. Then, the control device controls the electromagnet to firmly attract pallet 1. Finally, the conveyor belt 3 transports pallet 1 to the third station, thus completing the loading and unloading process.

[0026] Furthermore, the positioning rivet sidewall of the pallet 1 is provided with a steel ball groove, and the inner sidewall of the rivet insertion hole of the zero point locator 4 is provided with a limiting groove 42. A steel ball 41 is rolled in the limiting groove 42, and a reset structure 43 is provided in the limiting groove 42. When the positioning rivet at the bottom of the pallet 1 is inserted into the rivet insertion hole, the steel ball 41 is placed into the steel ball groove on the sidewall of the positioning rivet through the reset structure 43 and abuts against the positioning rivet.

[0027] like Figure 2 As shown, the steel ball 41 is rolledly connected to the limiting groove 42. The limiting groove 42 has a steel ball limiting structure at the opening to prevent the steel ball 41 from rolling out of the limiting groove 42 and falling into the rivet insertion hole. Due to the action of the reset structure 43, the steel ball 41 protrudes a part at the opening of the limiting groove 42. When the positioning rivet is inserted into the rivet insertion hole, the steel ball 41 is squeezed and rolls away from the positioning rivet. At this time, the reset structure 43 is subjected to force and applies a reaction force to the steel ball 41. Under the action of the reset structure 43, the steel ball 41 is finally placed into the steel ball groove on the side wall of the positioning rivet and abuts against the positioning rivet. Thus, the tray 1 is locked on the zero point positioner 4.

[0028] Furthermore, there are at least two steel balls 41, limiting grooves 42, and reset structures 43, with several limiting grooves 42 symmetrically arranged on the inner wall of the rivet insertion hole.

[0029] There are at least two steel balls 41, limiting grooves 42, and reset structures 43, which can ensure the locking ability of the zero-point positioner 4. Since the steel ball 41 abuts against the positioning pull pin and provides a horizontal force, several limiting grooves 42 are symmetrically arranged on the inner side wall of the pull pin insertion hole to ensure force balance and further enhance the locking ability.

[0030] Furthermore, the reset structure 43 is a spring.

[0031] The reset structure 43 can also be an elastic material such as rubber, and preferably a spring in the present scheme in consideration of cost and reduction of structural complexity.

[0032] Further, the jacking cylinder head plate 7 is arranged, and the lower surface of the jacking cylinder head plate 7 is fixedly connected with the top of the cylinder rod 6.

[0033] The jacking cylinder head plate 7 is used for bearing the tray 1, assisting the positioning of the tray 1, and preventing the tray 1 from being deviated.

[0034] Further, the workbench 2 is provided with at least two jacking base cylinders 5, and the number of the cylinder rods 6 and the jacking cylinder head plate 7 is correspondingly arranged.

[0035] The workbench 2 is provided with at least two jacking base cylinders 5, and the number of the cylinder rods 6 in the jacking base cylinders 5 is reasonably designed, so that uniform and stable jacking force can be provided when the tray 1 is disassembled, the tray 1 is prevented from being inclined or stuck, and the possibility of failure is reduced.

[0036] Further, the workbench 2 is provided with at least two zero-point positioners 4, and the tray 1 is provided with a corresponding number of positioning draw pins.

[0037] In order to accurately position and reduce errors, and increase locking force, two zero-point positioners 4 are preferably adopted in the present scheme.

[0038] The workpiece tray loading and unloading structure provided by the utility model is not limited in preparation process and processing method, and for the technical personnel in the art, the utility model can have various changes and variations. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A workpiece pallet loading and unloading structure, comprising a pallet (1) and a worktable (2), wherein a pallet processing station is provided above the worktable (2), characterized in that, Includes a conveyor belt (3) suspended above the worktable (2). An electromagnet is fixedly mounted on the lower surface of the conveyor belt (3). The electromagnet is equipped with a control system to control its attraction force. The electromagnet has a first station, a second station, and a third station in the horizontal direction. The conveyor belt (3) is equipped with a drive device that drives the conveyor belt (3) to reciprocate in the horizontal direction, causing the electromagnet to switch between the first station, the second station, and the third station. The second station is located above the pallet processing station. The worktable (2) A zero-point locator (4) and a lifting base cylinder (5) are provided at the pallet processing station. A cylinder rod (6) is slidably connected inside the lifting base cylinder (5). A positioning pull pin is provided at the bottom of the pallet (1). The positioning pull pin can be inserted into the pull pin hole of the zero-point locator (4). The pallet (1) is detachably connected to the zero-point locator (4) through the positioning pull pin. The cylinder rod (6) can extend out from the lifting base cylinder (5) and lift the pallet (1) to the lower surface of the electromagnet. The upper surface of the pallet (1) has an electromagnet adsorption part.

2. The workpiece pallet loading and unloading structure according to claim 1, characterized in that, The positioning rivet of the tray (1) has a steel ball groove on its side wall. The inner side wall of the rivet insertion hole of the zero point locator (4) has a limit groove (42). A steel ball (41) is rolled in the limit groove (42). A reset structure (43) is provided in the limit groove (42). When the positioning rivet at the bottom of the tray (1) is inserted into the rivet insertion hole, the steel ball (41) is placed into the steel ball groove on the side wall of the positioning rivet through the reset structure (43) and abuts against the positioning rivet.

3. The workpiece pallet loading and unloading structure according to claim 2, characterized in that, There are at least two steel balls (41), limiting grooves (42) and reset structures (43), and several limiting grooves (42) are symmetrically arranged on the inner sidewall of the rivet insertion hole.

4. The workpiece pallet loading and unloading structure according to claim 2, characterized in that, The reset structure (43) is a spring.

5. The workpiece pallet loading and unloading structure according to claim 1, characterized in that, It includes a lifting cylinder head plate (7), the lower surface of which is fixedly connected to the top of the cylinder push rod (6).

6. The workpiece pallet loading and unloading structure according to claim 5, characterized in that, The workbench (2) is equipped with at least two lifting base cylinders (5), and the number of cylinder push rods (6) and lifting cylinder cover plates (7) are set accordingly.

7. The workpiece pallet loading and unloading structure according to claim 1, characterized in that, At least two zero-point locators (4) are provided on the workbench (2), and a corresponding number of positioning rivets are provided on the bottom of the tray (1).

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