Flexible centering mechanism

Abstract

The utility model belongs to the technical field of workpiece assembly, and particularly relates to a flexible centering mechanism which comprises a fixing frame, cylinder bodies of an upper air cylinder and a lower air cylinder are installed on the fixing frame, and piston rods of the upper air cylinder and the lower air cylinder are connected with an upper driving shifting piece and a lower driving shifting piece respectively. The upper driving plectrum and the lower driving plectrum are in linkage with an upper driven plectrum and a lower driven plectrum through a crank arm connecting rod structure, the crank arm connecting rod structure is rotationally installed on a center rotating shaft, and the upper driving plectrum, the lower driving plectrum, the upper driven plectrum and the lower driven plectrum are all supported and limited by a linear guide rail. The central rotating shaft and the linear guide rail are both installed on the fixing frame. Through driving of an upper cylinder and a lower cylinder and combination of a crank arm connecting rod mechanism, flexible and efficient centering positioning of circular, positive and rectangular workpieces is achieved, and meanwhile positioning consistency and accuracy are guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of workpiece assembly technology, specifically relating to a flexible centering mechanism. Background Technology

[0002] In existing technologies, V-groove clamping and four-jaw linkage clamping are common workpiece positioning methods. However, these methods are mainly suitable for clamping square or round workpieces. For centering workpieces of other shapes such as cuboids, manual adjustment is often required, which is complex and inefficient. In addition, manual adjustment also suffers from problems such as low positioning accuracy and poor repeatability, making it difficult to meet the demands of modern industry for high-precision, high-efficiency, and automated production. Utility Model Content

[0003] To address the above problems, the purpose of this utility model is to provide a flexible centering mechanism that solves the problem that existing V-groove clamping or four-jaw linkage clamping can only clamp square or round workpieces, while other centering mechanisms require manual adjustment to achieve cuboid positioning.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a flexible centering mechanism, comprising a fixed frame, on which cylinder bodies of an upper cylinder and a lower cylinder are mounted. The piston rods of the upper cylinder and the lower cylinder are respectively connected to an upper active lever and a lower active lever. The upper active lever and the lower active lever are linked to an upper driven lever and a lower driven lever respectively through two sets of crank arm connecting rod structures. The crank arm connecting rod structures are rotatably mounted on a central rotating shaft. The upper active lever, the lower active lever, the upper driven lever, and the lower driven lever are all supported and limited by a linear guide rail. The central rotating shaft and the linear guide rail are both mounted on the fixed frame. The upper active lever, the lower active lever, the upper driven lever, and the lower driven lever are all connected to clamping arms through connecting plates. The fixed frame has a slot for slidingly connecting the clamping arms.

[0005] The beneficial effects of this utility model are as follows: by driving with upper and lower double-layer cylinders and combining with the crank arm connecting rod mechanism, it can achieve flexible and efficient centering positioning of circular, positive, and rectangular workpieces, while ensuring the consistency and accuracy of positioning.

[0006] To ensure the stability of the movement of the four paddles;

[0007] As a further improvement to the above technical solution: the upper active lever, the lower active lever, the upper driven lever, and the lower driven lever are respectively mounted on the slides of four independent linear guides, and the guide rails of the linear guides are mounted on a fixed frame.

[0008] The beneficial effects of this improvement are: the linear guide rail can provide stable support and guidance for the upper active lever, lower active lever, upper driven lever, and lower driven lever, ensuring the stability of the movement of each lever.

[0009] In order to achieve synchronous linkage between the active and passive paddles through the use of the articulated arm linkage structure;

[0010] As a further improvement to the above technical solution: the crank arm connecting rod structure includes a rotating arm, which is rotatably mounted on a central rotating shaft. The two ends of the rotating arm are respectively rotatably connected to connecting arm one and connecting arm two via pins. Connecting arm one and connecting arm two have the same structure, and the other ends of the two sets of connecting arm one are respectively rotatably connected to the upper active paddle and the lower active paddle via pins. The other ends of the two sets of connecting arm two are respectively rotatably connected to the upper driven paddle and the lower driven paddle via pins.

[0011] The beneficial effects of this improvement are as follows: through the linkage of the two sets of crank arm connecting rod structures, the upper cylinder can drive the upper active paddle and the upper driven paddle to move in opposite directions at the same speed, and the lower cylinder can drive the lower active paddle and the lower driven paddle to move in opposite directions at the same speed.

[0012] To ensure the overall stability of the device;

[0013] As a further improvement to the above technical solution: the fixing frame includes a base plate and side connecting plates, and the base plate is multiple and installed on the side connecting plates at intervals.

[0014] The beneficial effect of this improvement is that multiple base plates can stably support the cylinders and linear guides that are arranged vertically in the device.

[0015] To ensure the stability of the clamp arm alignment;

[0016] As a further improvement to the above technical solution: the four clamping arms installed above the upper active lever, lower active lever, upper driven lever, and lower driven lever are at the same height.

[0017] The beneficial effect of this improvement is that when the four clamping arms with the same installation height move towards each other, stable centering of the workpiece can be achieved.

[0018] The parts not involved in the device are the same as those in the prior art or can be implemented by using the prior art. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model with part of the base plate removed;

[0020] Figure 2 It is a structural diagram of the utility model;

[0021] Figure 3 This is a schematic diagram of the present invention without the fixing frame;

[0022] In the diagram: 1. Fixed frame; 101. Base plate; 102. Side connecting plate; 2. Upper cylinder; 3. Lower cylinder; 4. Upper active lever; 5. Lower active lever; 6. Crank arm connecting rod structure; 61. Rotating arm; 62. Connecting arm one; 63. Connecting arm two; 7. Central rotating shaft; 8. Upper driven lever; 9. Lower driven lever; 10. Linear guide rail; 11. Clamping arm; 12. Connecting plate. Detailed Implementation

[0023] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of the present invention in any way.

[0024] Example 1:

[0025] like Figure 1—3 shows: A flexible centering mechanism, including a fixed frame 1, on which the cylinder bodies of an upper cylinder 2 and a lower cylinder 3 are mounted. The piston rods of the upper cylinder 2 and the lower cylinder 3 are respectively connected to an upper active lever 4 and a lower active lever 5. The upper active lever 4 and the lower active lever 5 are respectively linked to an upper driven lever 8 and a lower driven lever 9 through two sets of crank arm connecting rod structures 6. The crank arm connecting rod structures 6 are rotatably mounted on a central rotating shaft 7. The upper active lever 4, the lower active lever 5, the upper driven lever 8, and the lower driven lever 9 are all supported and limited by a linear guide rail 10. The central rotating shaft 7 and the linear guide rail 10 are both mounted on the fixed frame 1. The upper active lever 4, lower active lever 5, upper driven lever 8, and lower driven lever 9 are all connected to clamping arms 11 via connecting plates 12. The fixed frame 1 has slots for slidingly connecting the clamping arms 11. Driven by upper and lower double-layer cylinders and combined with a crank arm linkage mechanism, flexible and efficient centering positioning of circular, positive-direction, and rectangular workpieces is achieved, while ensuring consistency and accuracy in positioning. The upper active lever 4, lower active lever 5, upper driven lever 8, and lower driven lever 9 are respectively mounted on the slides of four independent linear guide rails 10. The guide rails of the linear guide rails 10 are mounted on the fixed frame 1. The linear guide rails 10 can be the upper active lever 4, lower active lever 5, etc. The upper driven paddle 8 and the lower driven paddle 9 provide stable support and guidance, ensuring the stability of each paddle's movement. The crank arm linkage structure 6 includes a rotating arm 61, which is rotatably mounted on the central rotating shaft 7. The two ends of the rotating arm 61 are rotatably connected to connecting arm 1 62 and connecting arm 2 63 respectively via pins. Connecting arm 1 62 and connecting arm 2 63 have the same structure, and the other ends of the two sets of connecting arms 1 62 are rotatably connected to the upper driving paddle 4 and the lower driving paddle 5 respectively via pins. The other ends of the two sets of connecting arms 2 63 are rotatably connected to the upper driven paddle 8 and the lower driven paddle 9 respectively via pins. Through the linkage of the two sets of crank arm linkage structures 6, The upper cylinder 2 can drive the upper active paddle 4 and the upper driven paddle 8 to move in opposite directions at the same speed. The lower cylinder 3 can drive the lower active paddle 5 and the lower driven paddle 9 to move in opposite directions at the same speed. The fixed frame 1 includes a base plate 101 and a side connecting plate 102. There are multiple base plates 101, which are installed on the side connecting plate 102 at intervals. The multiple base plates 101 can stably support the cylinders and linear guides that are arranged vertically and vertically in the device. The four clamping arms 11 installed above the upper active paddle 4, the lower active paddle 5, the upper driven paddle 8, and the lower driven paddle 9 are at the same height. When the four clamping arms 11 with the same installation height move towards each other, the workpiece can be stably centered.

[0026] The working principle of this technical solution is as follows: The component to be centered is placed on the base plate 101 above the central rotating shaft 7. The upper cylinder 2 works first, driving the upper active lever 4 to slide on the linear guide rail 10. The upper driven lever 8 is linked through the crank arm connecting rod structure 6, so that the upper active lever 4 and the upper driven lever 8 advance synchronously. When the upper cylinder 2 is subjected to the reaction force of the object to be centered, the upper cylinder 2 remains in the pushed-out state, and the lower cylinder 3 starts to work, driving the lower active lever 5 to slide on the linear guide rail 10. The lower driven lever 9 is linked through the crank arm connecting rod structure 6, so that the crank arm connecting rod structure 6 and the lower driven lever 9 advance synchronously. When the lower cylinder 3 is subjected to the reaction force of the object to be centered, the object to be centered is centered, and the upper cylinder 2 and the lower cylinder 3 retract simultaneously to release the component that has completed the centering positioning.

[0027] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0028] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only for the purpose of helping to understand the method and core ideas of the present invention. The above descriptions are only preferred embodiments of the present invention. It should be noted that due to the limitations of textual expression, there are objectively infinite specific structures. For those skilled in the art, several improvements, modifications, or changes can be made without departing from the principles of the present invention, and the above technical features can also be combined in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of the present invention.

Claims

1. A flexible centering mechanism, characterized in that: Includes a fixed frame (1), on which the cylinder bodies of an upper cylinder (2) and a lower cylinder (3) are mounted. The piston rods of the upper cylinder (2) and the lower cylinder (3) are respectively connected to an upper active paddle (4) and a lower active paddle (5). The upper active paddle (4) and the lower active paddle (5) are respectively linked to an upper driven paddle (8) and a lower driven paddle (9) through two sets of crank arm connecting rod structures (6). The crank arm connecting rod structure (6) is rotatably mounted on a central rotating shaft (7). The upper active lever (4), lower active lever (5), upper driven lever (8), and lower driven lever (9) are all supported and limited by the linear guide rail (10). The central rotating shaft (7) and the linear guide rail (10) are both mounted on the fixed frame (1). The upper active lever (4), lower active lever (5), upper driven lever (8), and lower driven lever (9) are all connected to clamping arms (11) through the connecting plate (12). The fixed frame (1) has a slot for sliding connection of the clamping arms (11).

2. The flexible centering mechanism according to claim 1, characterized in that: The upper active lever (4), lower active lever (5), upper driven lever (8), and lower driven lever (9) are respectively installed on the slides of four independent linear guides (10), and the guide rails of the linear guides (10) are installed on the fixed frame (1).

3. The flexible centering mechanism according to claim 1, characterized in that: The crank arm connecting rod structure (6) includes a rotating arm (61), which is rotatably mounted on a central rotating shaft (7). The two ends of the rotating arm (61) are rotatably connected to connecting arm one (62) and connecting arm two (63) respectively via pins. The connecting arm one (62) and connecting arm two (63) have the same structure. The other ends of the two sets of connecting arm one (62) are rotatably connected to the upper active paddle (4) and the lower active paddle (5) respectively via pins. The other ends of the two sets of connecting arm two (63) are rotatably connected to the upper driven paddle (8) and the lower driven paddle (9) respectively via pins.

4. The flexible centering mechanism according to claim 1, characterized in that: The fixing frame (1) includes a base plate (101) and a side connecting plate (102). There are multiple base plates (101) installed on the side connecting plate (102) at intervals.

5. The flexible centering mechanism according to claim 1, characterized in that: The four clamping arms (11) installed above the upper active paddle (4), lower active paddle (5), upper driven paddle (8), and lower driven paddle (9) are at the same height.

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