Mechanical self-locking mechanism for vertical telescopic cylinder after gas cutoff

Abstract

The utility model belongs to the technical field of automobile manufacturing, concretely relates to a kind of mechanical self-locking mechanism for vertical direction telescopic cylinder after breaking, including installation base, lifting cylinder, lifting cylinder mounting plate, positioning pin, transverse telescopic cylinder, connecting block and limit plate;The lifting cylinder mounting plate is fixed on installation base by bolt connection, the lifting cylinder is installed on lifting cylinder mounting plate, the positioning pin is connected with lifting cylinder, and the positioning pin has accurate positioning cylindrical surface and support surface;The cylinder head of the transverse telescopic cylinder is locked with connecting block, connecting block is connected with limit plate by bolt, and cooperating sliding slot is equipped between limit plate and lifting cylinder mounting plate, and both can slide relatively.The utility model is through the mechanical self-locking structure of additional transverse telescopic cylinder and limit plate, effectively solve the functional failure problem of vertical direction lifting positioning pin under breaking condition.

Description

Technical Field

[0001] This utility model belongs to the field of automobile manufacturing technology, and specifically relates to a mechanical self-locking mechanism for a vertical telescopic cylinder after the air supply is cut off. Background Technology

[0002] In automotive welding production lines, the bottom positioning of the conveyor cart storing body panels relies on precise positioning and stable lifting to ensure the accuracy of subsequent robot part retrieval. Current technology typically employs a lifting cylinder in conjunction with a positioning pin to achieve this function: when the lifting cylinder is extended, it raises the positioning pin, which engages with the positioning hole on the cart to complete precise positioning. Simultaneously, it lifts the cart to a certain height, effectively avoiding positioning errors caused by uneven workshop floors and reducing robot part retrieval deviations.

[0003] However, existing technologies have obvious drawbacks: the power and gas supply in the workshop often become unstable due to complex working conditions. Once the gas supply is cut off, the lifting cylinder will lose its driving force and will be unable to maintain the lifting height and positioning of the material cart. This may cause the material cart to fall or fail to position, which will not only affect the continuity of production, but may also cause robot picking errors due to positioning deviations, or even damage to equipment or workpieces, posing hidden dangers to production. Utility Model Content

[0004] The purpose of this invention is to provide a mechanical self-locking mechanism for a vertical telescopic cylinder after the air supply is cut off, so as to solve the problems existing in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a mechanical self-locking mechanism for a vertical telescopic cylinder after air cut-off, comprising a mounting base, a lifting cylinder, a lifting cylinder mounting plate, a positioning pin, a horizontal telescopic cylinder, a connecting block, and a limiting plate; the lifting cylinder mounting plate is fixed to the mounting base by bolts, the lifting cylinder is mounted on the lifting cylinder mounting plate, the positioning pin is connected to the lifting cylinder, and the positioning pin has a precision positioning cylindrical surface and a support surface; the cylinder head of the horizontal telescopic cylinder is locked to the connecting block, the connecting block is connected to the limiting plate by bolts, and a matching groove is provided between the limiting plate and the lifting cylinder mounting plate, allowing them to slide relative to each other; the limiting plate has two circular holes with different diameters, wherein the smaller diameter hole is tightly fitted with the diameter of the positioning pin, and the larger diameter hole is larger than the outer diameter of the supporting surface of the positioning pin.

[0006] Preferably, the lifting cylinder can drive the positioning pin to rise, so that the positioning pin engages with the positioning hole on the material cart, and lift the material cart off the ground through the support surface.

[0007] Preferably, after the lifting cylinder drives the positioning pin to extend into place, the lateral telescopic cylinder can switch to the extended state, driving the connecting block and the limiting plate to move, so that the small diameter of the limiting plate switches to cooperate with the positioning pin, forming mechanical support for the positioning pin.

[0008] Preferably, the lateral telescopic cylinder is equipped with a magnetic switch assembly for detecting whether the movement of the lateral telescopic cylinder is in place.

[0009] The beneficial effects of this utility model are as follows: By adding a mechanical self-locking structure consisting of a lateral telescopic cylinder and a limiting plate, this utility model effectively solves the problem of functional failure of the vertical lifting positioning pin in the event of air shortage. After the lifting cylinder drives the positioning pin to complete the lifting and positioning of the material cart, the lateral telescopic cylinder drives the limiting plate to form mechanical support for the positioning pin. Even if the lifting cylinder loses its driving force due to air shortage, the weight of the material cart can still be transferred to the mounting base through the limiting plate, ensuring that the material cart maintains its lifting height and positioning state, and guaranteeing production stability.

[0010] This ingeniously designed mechanism allows for switching between different apertures on the limit plate simply by extending and retracting a lateral telescopic cylinder. It reliably locks itself when lifted into position and easily unlocks after operation, making it convenient to use. Furthermore, the magnetic switch assembly of the lateral telescopic cylinder accurately detects the position of the movement. The overall structure is simple and compact, easily integrated into existing material cart positioning systems, and significantly improves the safety and reliability of the equipment in environments with unstable air supply. Attached Figure Description

[0011] Figure 1 This is a perspective view of the present utility model; Figure 2 This is a new sectional view for this utility model. Detailed Implementation

[0012] In the description of this disclosure, it should be understood that the terms “center,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this disclosure and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure.

[0013] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this disclosure, unless otherwise stated, "a plurality of" means two or more.

[0014] In the description of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing" 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, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0015] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings and preferred embodiments.

[0016] like Figures 1-2 As shown, this utility model discloses a mechanical self-locking mechanism for use after the air supply to the vertical telescopic cylinder is cut off. It aims to solve the problem of the material cart falling and positioning failure caused by the air supply to the lifting cylinder being cut off during bottom positioning of the material cart in an automotive welding production line. Its core structure includes a mounting base 1, a lifting cylinder 2, a lifting cylinder mounting plate 3, a positioning pin 4, a horizontal telescopic cylinder 5, a connecting block 6, and a limiting plate 7. The connection relationship and working process of each component are as follows: Mounting base 1 serves as the basic support component for the entire mechanism. The lifting cylinder mounting plate 3 is fixed to it using bolts, ensuring the installation stability of the lifting cylinder 2. The lifting cylinder 2 is vertically mounted on the lifting cylinder mounting plate 3, with its cylinder head connected to the positioning pin 4. The positioning pin 4 is designed with a precision positioning cylindrical surface and a support surface. The precision positioning cylindrical surface is used to mate with the positioning holes on the material cart to achieve accurate positioning, while the support surface is used to lift the material cart during lifting, allowing it to leave the ground and preventing uneven ground from affecting positioning accuracy.

[0017] The horizontal telescopic cylinder 5 is horizontally arranged, and its cylinder head is fixed to the connecting block 6 by a locking structure to ensure synchronous telescopic movement. The connecting block 6 is connected to the limiting plate 7 by bolts, which drives the limiting plate 7 to move horizontally with the movement of the horizontal telescopic cylinder 5. A sliding groove is provided between the limiting plate 7 and the lifting cylinder mounting plate 3, which not only ensures the accuracy of the relative sliding between the two, but also reduces the frictional resistance during movement. The limiting plate 7 has two circular holes with different diameters: the smaller diameter hole fits tightly with the outer diameter of the positioning pin 4, and the larger diameter hole is larger than the outer diameter of the supporting surface of the positioning pin 4. The telescopic movement of the horizontal telescopic cylinder 5 can achieve switching between the two hole diameters and the positioning pin 4.

[0018] The specific work process is divided into the following stages: Lifting and positioning stage: When the material cart reaches the bottom positioning position, the lifting cylinder 2 is ventilated, the cylinder head extends upward, and the positioning pin 4 rises synchronously. The precision positioning cylindrical surface of the positioning pin 4 first inserts into the positioning hole of the material cart to complete the precision positioning; then the support surface contacts the bottom of the material cart, and the lifting continues to lift the material cart off the ground to the set height. At this time, the lifting cylinder 2 is in the extended position.

[0019] Self-locking stage: After lifting to the correct position, the lateral telescopic cylinder 5 is ventilated, and the cylinder head extends. Through the connecting block 6, it drives the limiting plate 7 to move along the slide groove, causing the small-diameter circular hole on the limiting plate 7 to engage with the positioning pin 4—the small-diameter hole tightly engages with the positioning pin 4, supporting it. At this time, the weight of the material cart is sequentially transmitted through the positioning pin 4, connecting block 6, and limiting plate 7 to the lifting cylinder mounting plate 3, and finally borne by the mounting base 1, achieving mechanical self-locking. Even if the lifting cylinder 2 is de-ventilated and the cylinder head loses its driving force, the positioning pin 4 can still maintain the lifting height, ensuring stable positioning of the material cart.

[0020] Unlocking and Reset Phase: After the robot finishes its part-picking operation, provided that the lifting cylinder 2 is properly inflated and remains extended, the lateral telescopic cylinder 5 is de-aired, the cylinder head retracts, and the connecting block 6 and the limiting plate 7 move in the opposite direction. This causes the large-diameter hole on the limiting plate 7 to align with the positioning pin 4 (the large-diameter hole is larger than the outer diameter of the supporting surface of the positioning pin 4, so it does not affect the extension and retraction of the positioning pin 4). Subsequently, the lifting cylinder 2 is de-aired, the cylinder head retracts, and the positioning pin 4 descends, causing the trolley to fall back to the ground, detach from the positioning support, and be pushed to the next process.

[0021] In this embodiment, the transverse telescopic cylinder 5 is also equipped with a magnetic switch assembly to detect the extension and retraction of the cylinder head in real time, ensuring the accuracy of aperture switching and further improving the reliability of the mechanism.

[0022] For those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. A mechanical self-locking mechanism for a vertically telescopic cylinder after air supply is cut off, characterized in that, The system includes a mounting base (1), a lifting cylinder (2), a lifting cylinder mounting plate (3), a positioning pin (4), a transverse telescopic cylinder (5), a connecting block (6), and a limiting plate (7). The lifting cylinder mounting plate (3) is fixed to the mounting base (1) by bolts. The lifting cylinder (2) is mounted on the lifting cylinder mounting plate (3). The positioning pin (4) is connected to the lifting cylinder (2) and has a precision positioning cylindrical surface and a support surface. The cylinder head of the transverse telescopic cylinder (5) is locked to the connecting block (6). The connecting block (6) is connected to the limiting plate (7) by bolts. A matching groove is provided between the limiting plate (7) and the lifting cylinder mounting plate (3), allowing them to slide relative to each other. The connecting block (6) has two circular holes with different diameters. The smaller diameter hole is tightly fitted with the diameter of the positioning pin (4), and the larger diameter hole is larger than the outer diameter of the supporting surface of the positioning pin (4).

2. The mechanical self-locking mechanism according to claim 1, characterized in that, The lifting cylinder (2) can drive the positioning pin (4) to rise, so that the positioning pin (4) engages with the positioning hole on the material cart, and lifts the material cart off the ground through the support surface.

3. The mechanical self-locking mechanism according to claim 1, characterized in that, When the lifting cylinder (2) drives the positioning pin (4) to extend into place, the transverse telescopic cylinder (5) can switch to the extended state, driving the connecting block (6) and the limiting plate (7) to move, so that the small hole on the limiting plate (7) switches to cooperate with the positioning pin (4) and forms mechanical support for the positioning pin (4).

4. The mechanical self-locking mechanism according to claim 1, characterized in that, The transverse telescopic cylinder (5) is equipped with a magnetic switch assembly for detecting whether the movement of the transverse telescopic cylinder (5) is in place.

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