A self-resetting pallet sinking positioning mechanism

Abstract

The present invention discloses a self-resetting pallet sinking and positioning mechanism, which includes a support unit, a pin unit, a descending execution unit, and a precise positioning unit, and further includes a small section of wire body supported by the descending execution unit. Among them, the pallet is separably supported on the small section of wire body. Among them, the pallet is supported on the precise positioning unit and positioned by the pin unit during operation, and the small section of wire body is in a sinking state. Among them, the descending execution unit further includes an elastic reset assembly for forcing the small section of wire body to self-reset when the execution cylinder of the descending execution unit abnormally loses air. The positioning mechanism according to the present invention realizes high-precision secondary positioning of the pallet under normal circumstances, and at the same time realizes the requirement that the sunk wire body needs to flow out for maintenance in the case of abnormal air and power interruption. Moreover, the overall structure is modularly designed, and the maintenance, disassembly and assembly are simple, ensuring the requirements of high precision and high beat of the equipment.

Description

Technical Field

[0001] The invention relates to a line tray positioning technology, in particular to a self-resetting tray sinking positioning mechanism. Background Art

[0002] In general assembly lines, pin positioning or lifting positioning is commonly used to perform secondary positioning of the pallet to meet various functional requirements, such as pressing, gluing, handling, testing, oiling and other equipment with precision requirements.

[0003] After the ordinary latch mechanism is positioned, the pallet does not detach from the line. The current latch positioning method can only play a positioning role and cannot ensure that the pallet is detached from the conveyor line. The vibration of the conveyor line will affect the accuracy. In addition, when there is a vertical force, the conveyor line cannot withstand it. For example, the pressing force from above will be directly transmitted to the line body. The use range of the line body is limited and the functional life cannot be met.

[0004] Another lifting and positioning method is to lift the pallet off the line. Although it avoids the problem of pin positioning, the lifting mechanism itself is complex and is a movable mechanism. It wastes time and its moving rollers or sliders will consume life and precision, which will affect the quality of the product.

[0005] What is important is that when the execution cylinder of both systems stops working abnormally, the pallet cannot be released from its position, which in turn affects maintenance and function recovery, easily causing long-term line shutdowns and affecting production. Summary of the invention

[0006] The purpose of the present invention is to provide a self-resetting tray sinking positioning mechanism, which can not only solve the problem of high-precision secondary positioning and force of the tray, but also solve the problem of automatic resetting of the line body in the event of abnormal gas interruption, thereby ensuring that the tray can flow out easily.

[0007] To this end, the present invention provides a self-resetting pallet sinking positioning mechanism, comprising a supporting unit, a latch unit, a descent execution unit, and a precise positioning unit, and also comprising a small segment wire body supported by the descent execution unit, wherein the pallet is detachably supported on the small segment wire body, the latch unit is arranged on the supporting unit, and is used to position the pallet in the XY plane when the pallet is in place, the descent execution unit can drive the small segment wire body to sink, and the precise positioning unit is used to support the pallet in the Z direction when the small segment wire body sinks, wherein the pallet is supported on the precise positioning unit and positioned by the latch unit during operation, and the small segment wire body is in a sinking state, wherein the descent execution unit also comprises an elastic reset component, which is used to force the small segment wire body to self-reset when the execution cylinder of the descent execution unit is abnormally de-energized.

[0008] The positioning mechanism according to the present invention realizes the high-precision secondary positioning of the tray under normal circumstances, and at the same time realizes the requirement that the sunken line body needs to flow out for maintenance in case of abnormal air cut-off and power failure. Moreover, the overall structure is modularly designed, and the maintenance, disassembly and assembly are simple, ensuring the requirements of high precision and high beat of the equipment, which is particularly important for high-production assembly lines, can greatly improve the positioning accuracy and output, and at the same time can reduce the maintenance downtime.

[0009] In addition to the purposes, features and advantages described above, the present invention has other purposes, features and advantages. The following will refer to the drawings and describe the present invention in further detail. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The accompanying drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof of the present invention are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0011] Figure 1 is a schematic structural diagram of a self-resetting tray sinking positioning mechanism according to the present invention;

[0012] Figure 2 shows the side structure of the self-resetting tray sinking positioning mechanism, in which the tray is removed;

[0013] Figure 3 shows a schematic structural diagram of the main part of the self-resetting tray sinking positioning mechanism according to the present invention;

[0014] Figure 4 shows the internal structure of the self-resetting tray sinking positioning mechanism according to the present invention;

[0015] Figure 5 shows the use state of the self-resetting tray sinking positioning mechanism according to the present invention;

[0016] Figure 6 shows the internal structure of the positioning pin of the self-resetting tray sinking positioning mechanism according to the present invention;

[0017] Figure 7 shows a schematic diagram of the descending plate in the in-situ state in the descending execution unit according to the present invention; and

[0018] Figure 8 shows a schematic diagram of the descending plate in the sunken state in the descending execution unit according to the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The following will refer to the drawings and describe the present invention in detail with reference to the embodiments.

[0020] According to the usage characteristics of the assembly line, the present invention provides a self-resetting pallet sinking positioning mechanism 100 that can achieve secondary positioning with high precision requirements, and the pallet 30 can actively return to its original position in the event of air or power cut-off.

[0021] The mechanism 100 includes a support unit 1, a pin unit 2, a descending execution unit 3, and a precise positioning unit 4.

[0022] The support unit 1 includes a support plate 18 and a pose adjustment base 19, and the support plate 18 serves as the basis for installing other functional components. The pin unit 2 is used for XY-direction positioning of the pallet. The descending execution unit 3 is used for the lifting and lowering of the small section of the line body 20. The precise positioning unit 4 is used for Z-direction positioning of the pallet 30.

[0023] When the two pins of the pin unit 2 are used simultaneously, the degrees of freedom in the XY direction of the pallet can be positioned. When the two descending execution components of the descending execution unit 3 are used simultaneously, the small section of the line body can move downward. When the four precise positioning units of the precise positioning unit 4 are used simultaneously, the degrees of freedom in the Z direction of the pallet can be positioned. When the pin unit 2 and the descending execution unit 3 are used simultaneously as a whole, the pallet can be precisely positioned and land on the precise positioning unit 4 to maintain its position.

[0024] The line body on the existing assembly line is arranged in a whole section and is fixed on the frame without movement. In the present invention, however, the small section of the line body is specially provided. It is different from the whole section of the line body. It is a small section of the line body, for example, a section of the line body about 0.8 meters to 1.5 meters in length, which is arranged at a certain work station of the pallet. It is supported on the descending execution unit 3 and can move downward under the drive of the descending execution unit 3.

[0025] The descending execution unit 3 mainly consists of a descending execution cylinder 5, a descending execution pull plate 6, a spring guide seat 7, a spring 8, a spring lock piece 9, a descending detection block 10, a lifting and lowering detection switch 11, and a descending plate 12.

[0026] The two descending execution cylinders 5 are arranged at intervals along the width direction of the line body. Each descending execution cylinder 5 is fixedly installed on the descending plate. Each descending execution cylinder 5 is equipped with a descending execution pull plate 6. One end of the descending execution pull plate 6 is fixedly connected to the support plate 18 to transmit the cylinder pulling force and force the descending plate 12 to move downward.

[0027] The spring guide seats 7 are arranged in pairs, that is, two spring guide seats 7 are arranged side by side as a group, and the lower ends are fixed on the support plate 18. The spring 8 is sleeved on the spring guide seat 7, and its upper end abuts against the lower surface of the descending plate 12. The spring guide seat 7 is used to provide guidance for the lifting and lowering movement of the descending plate 12, and at the same time, the spring 8 is installed to force the descending plate to return to its original position and release the sinking state.

[0028] The spring lock piece 9 locks together two spring guide seats 7 protruding from the upper surface of the descending plate 12.

[0029] The descending plate 12 is used to be fixed together with the small section of wire body 20. On the one hand, it serves as a support structure for the small section of wire body, and on the other hand, it drives the small section of wire body to sink synchronously.

[0030] The descending detection block 10 is fixed on the lower surface of the descending plate 12 and moves synchronously with the descending plate 12. The lifting and descending detection switch 11 is used to detect the descending detection block 10 and trigger the in-place signal after the descending plate 12 descends in place.

[0031] The plug unit 2 mainly consists of a plug cylinder 13, a plug cylinder mounting seat 14, a plug connecting rod 15, a positioning plug 16, and a plug up-and-down detection switch 17.

[0032] Two plug cylinders 13 are arranged diagonally on the support plate 18 for positioning in the XY plane.

[0033] The plug cylinder mounting seat 14 is fixedly installed on the support plate 18 for fixing the plug cylinder 13. It consists of a lower seat cylinder and an upper sleeve. The plug cylinder 13 is fixedly installed in the lower seat cylinder of the plug cylinder mounting seat 14.

[0034] The plug connecting rod 15 connects the plug cylinder 13 and the positioning plug 16, and one end extends out of the upper sleeve of the plug cylinder mounting seat 14. Among them, the upper sleeve of the plug cylinder mounting seat 14 provides guidance for the telescopic movement of the plug connecting rod 15.

[0035] The positioning plug 16 is installed on the plug connecting rod 15, and its shape is various, such as circular, diamond-shaped, etc. It is selected according to needs. For example, circular and diamond-shaped are used in combination to perform planar positioning on the tray.

[0036] The plug up-and-down detection switch 17 is used to detect the position state of the plug cylinder.

[0037] The precise positioning unit 4 mainly consists of four positioning rods. The height L is the position height difference between the positioning rod and the tray. This height difference is preferably 3 mm. After the descending plate 12 descends in place, the height L is 0.

[0038] The working process of this mechanism is as follows:

[0039] After the tray arrives, the positioning plug 16 drives the plug connecting rod 15 and the positioning plug 16 through the plug cylinder 13 to perform XY-direction positioning on the tray.

[0040] After the tray is planar positioned, the descending execution cylinder 5 pulls the descending plate 12 to drive the small section of wire body to sink. At this time, the tray stays on the positioning rod 4.

[0041] After the pallet completes its function, the lowering actuator cylinder 5 releases air pressure, the spring 8 resets, and pushes the entire lowering actuator unit 3 to the upper position, driving the small section of the wire body to reset.

[0042] Importantly, in the abnormal working state (air supply cut-off, power cut-off state), such as Figure 7 and 8 shown, when there is an abnormal power cut and air supply cut-off, the lowering actuator cylinder 5 automatically releases air pressure. At this time, the spring 8 also resets and pushes the entire lowering actuator unit 3 to the upper position. This keeps the pallet in place, and during maintenance, it can be manually pushed out of the station for repair directly.

[0043] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, 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 self-resetting pallet sinking positioning mechanism, characterized in that, It includes a support unit (1), a pin unit (2), a descending execution unit (3), and a precise positioning unit (4), and also includes a small wire body (20) supported by the descending execution unit (3). Among them, the tray (30) is separably supported on the small wire body (20). The pin unit (2) is arranged on the support unit (1) and is used to position the tray in the XY plane when the tray (30) is in place. The descending execution unit (3) can drive the small wire body to move downward. The precise positioning unit (4) is used to support the tray in the Z direction when the small wire body moves downward. The descending execution unit includes a first execution component and a second execution component, which are arranged at intervals along the length direction of the small wire body and jointly support the small wire body. The descending execution component includes a descending execution cylinder (5), a descending execution pull plate (6), a descending detection block (10), a lifting detection switch (11), and a descending plate (12). Among them, the descending execution cylinder (5) is arranged on the descending plate (12), and the descending plate (12) is connected to the small wire body (20). The descending execution component includes two descending execution cylinders (5) arranged along the width direction of the wire body, and two elastic reset components are arranged outside the two descending execution cylinders. The elastic reset component includes two spring guide seats (7), two springs (8), and a spring lock piece (9) arranged side by side. Among them, the tray is supported on the precise positioning unit (4) and positioned by the pin unit (2) during operation, and the small wire body is in a descending state. Among them, the descending execution unit (3) also includes an elastic reset component, which is used to force the small wire body to self-reset when the execution cylinder of the descending execution unit (3) abnormally cuts off the air supply.

2. The self-resetting tray sinking and positioning mechanism according to claim 1, wherein The pin unit (2) includes a plurality of pin components, and each pin component includes a pin cylinder (13), a pin cylinder mounting seat (14), a pin connecting rod (15), a positioning pin (16), and a pin up and down detection switch (17).

3. The self-resetting tray sinking and positioning mechanism according to claim 1, characterized in that, The precise positioning unit (4) includes four positioning rods. Among them, the initial distance between the four positioning rods and the tray is 3 mm.

4. The self-resetting tray sinking and positioning mechanism according to claim 1, wherein The support unit (1) includes a support plate (18) and a pose adjustment base (19).

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