Double-guide-rod air cylinder limiting mechanism

Abstract

The utility model provides a double-guide-rod air cylinder limiting mechanism which is simple in structure, small in occupied space, low in cost and easy and convenient to operate and install, and has a self-in-place limiting function. Comprising an air cylinder body, a connecting plate is installed on a telescopic rod of the air cylinder body, guide rods penetrating through the connecting plate are installed at the two ends of the air cylinder body, connecting blocks are fixedly connected to the two side ends of the air cylinder body, the connecting blocks are in a 7 shape, and first limiting blocks are installed on the bottom faces of the top ends of the connecting blocks; and a second limiting block is arranged on the connecting plate corresponding to the first limiting block.

Description

Technical Field

[0001] The utility model relates to the technical field of cylinder limiting technology, in particular to a double-guide-rod cylinder limiting mechanism. Background Art

[0002] In the automobile manufacturing industry, welding positioning fixtures are the cornerstone of the production line. The entire process of the vehicle from zero to complete is carried out on the positioning fixture. With the increase in the types and modifications of vehicle models, the design of the positioning fixture is also facing huge challenges. How to maximize its use within limited space and cost has become a turning point in the subsequent development of the positioning fixture. Therefore, it is necessary to derive a solution that occupies little space and can be repeatedly positioned while ensuring accurate positioning, saving space and high versatility.

[0003] When multiple models share the same fixture or multiple parts are welded on the same fixture, in order to ensure the convenience of taking out the parts after welding, generally at most two fixed pins are retained, and other positioning pins or positioning pins need to be telescopically switched. In order to ensure the repeat positioning accuracy, it is necessary to add a cylinder extension limit mechanism. However, the existing double guide rod cylinder still has the following disadvantages when limiting:

[0004] 1. High space requirements: Because the double guide rod cylinder is limited by the limit block set on other columns or connecting seats, and the limit block generally occupies a large space, it will affect the advance and retreat space of the welding gun for the originally narrow space, which is very local and difficult to operate;

[0005] 2. High overall cost: Since the double guide rod cylinder and the limit block are purchased parts and processed parts respectively, the diversified forms of the limit block will result in high processing costs;

[0006] 3. Difficult installation: Since they belong to different suppliers, the processing error is difficult to guarantee, and the overall accuracy after installation is difficult to control;

[0007] 4. High difficulty in on-site debugging: the purchased parts and processed parts need to be installed as a whole, involving many parts, and processing and assembly errors will affect the overall accuracy;

[0008] 5. Complex design: Additional limit blocks are required to connect positioning pins or support blocks, and the structure is complex. Utility Model Content

[0009] In view of the above problems, the utility model provides a double-guide-rod cylinder limiting mechanism, which has a simple structure, has its own in-place limiting function, occupies a small space, has low cost, and is simple and convenient to operate and install.

[0010] The utility model adopts the following technical scheme: a double-guide rod cylinder limiting mechanism, comprising a cylinder body, a connecting plate being mounted on the telescopic rod of the cylinder body, guide rods penetrating the connecting plate being mounted on both ends of the cylinder body, connecting blocks being fixedly connected to both side ends of the cylinder body, the connecting block being in a 7 shape, a first limiting block being mounted on the bottom surface of the top end of the connecting block, and a second limiting block being mounted on the connecting plate corresponding to the first limiting block.

[0011] Furthermore, a first limiting groove is provided on the bottom surface of the top end of the connecting block, and the first limiting block and the first limiting groove are installed by interference fit;

[0012] Furthermore, a second limiting groove is provided on the connecting plate, and the second limiting block is installed in an interference fit with the second limiting groove;

[0013] Furthermore, the bottom surface of the first limiting block is provided with a groove, and the second limiting block is provided with a convex portion corresponding to the groove;

[0014] Furthermore, the side wall surface of the groove and the corresponding side wall surface of the convex portion are both inclined surfaces;

[0015] Furthermore, a protrusion is provided on the top of the first limiting block, and the first limiting block is installed by interference fit between the protrusion and the first limiting groove;

[0016] Furthermore, the first limit block and the second limit block are both cylindrical structures, and the centers of the first limit block and the second limit block are both provided with through screw holes.

[0017] The beneficial effect of the utility model is that connecting blocks are fixed on both side ends of the double guide rod cylinder, and corresponding first limit blocks and second limit blocks are provided on the connecting blocks and the connecting plates. When the double guide rod cylinder rises, effective limiting can be achieved through the first limit blocks and the second limit blocks. It not only has a simple structure and occupies a small space, but also ensures the repeated stability of the cylinder extension positioning, achieves dual benefits of space and cost, and has good economic use value. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model;

[0019] Figure 2 It is a schematic diagram of the contact state of the first limit block and the second limit block in the utility model;

[0020] Figure 3 It is a state analysis sectional view of the first limit block and the second limit block in the utility model. DETAILED DESCRIPTION

[0021] like Figure 1 to Figure 3As shown, the utility model is a double-guide rod cylinder limiting mechanism, including a cylinder body 1, a connecting plate 3 is installed on the telescopic rod 2 of the cylinder body 1, guide rods 4 penetrating the connecting plate 3 are installed at both ends of the cylinder body 1, connecting blocks 5 are fixedly connected to both side ends of the cylinder body 1, and the connecting block 5 is in a 7 shape. A first limiting block 6 is installed on the bottom surface of the top of the connecting block 5, and a second limiting block 7 is installed on the connecting plate 3 corresponding to the first limiting block 6.

[0022] A first limiting groove (not shown in the figure) is provided on the bottom surface of the top end of the connecting block 5, and the first limiting block 6 is installed by interference fit with the first limiting groove; specifically, a protrusion 8 is provided on the top end of the first limiting block 6, and the first limiting block 6 is installed by interference fit with the first limiting groove through the protrusion 8; a second limiting groove 12 is provided on the connecting plate 3, and the second limiting block 7 is installed by interference fit with the second limiting groove 12.

[0023] The first limit block 6 and the second limit block 7 are both cylindrical structures, and the centers of the first limit block 6 and the second limit block 7 are each provided with a through screw hole 9. The first limit block 6 and the second limit block 7 are respectively assembled on the connecting block 5 and the connecting plate 3 through the screw hole 9 and bolts.

[0024] A groove 10 is formed on the bottom surface of the first limiting block 6, and a convex portion 11 corresponding to the groove 10 is formed on the second limiting block 7; the side wall surface of the groove 10 and the side wall surface of the convex portion 11 corresponding thereto are both inclined surfaces.

[0025] In the present invention, the connecting block 5 is directly connected to the cylinder body 1, and the first limit block 6 is fixedly connected to the connecting blocks 5 at both side ends. The second limit block 7 corresponding to the first limit block 6 is installed on the connecting plate 3, so that the repeated stability of the extended positioning of the double-guide rod cylinder can be guaranteed. Specifically, when the connecting plate 3 rises, it is guided by the guide rod 4 until the convex portion 11 of the second limit block 7 extends into the groove 10 of the first limit block 6 for limiting, so that the double-guide rod cylinder itself has the in-place limiting function, and there is no need to transfer other functional parts, thereby achieving the dual benefits of space and cost; in addition, the stroke of the cylinder extension can be achieved by setting the length of the connecting block 5 to meet diversified needs. For example, the total stroke of the double-guide rod cylinder is 50mm, but the actual stroke may be 30mm, 40mm or 45mm. In order to ensure the standardization rate and cost control, the cost of changing the cylinder body is too high, but at the same time, these needs need to be met, and different extension strokes can be achieved by changing the length of the connecting block 5.

[0026] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0027] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A double-guide rod cylinder limit mechanism, comprising a cylinder body, a connecting plate is mounted on the telescopic rod of the cylinder body, and guide rods penetrating the connecting plate are mounted on both ends of the cylinder body, characterized in that: Both side ends of the cylinder body are fixedly connected with connecting blocks, the connecting block is in a 7-shape, a first limiting block is installed on the bottom surface of the top of the connecting block, and a second limiting block is installed on the connecting plate corresponding to the first limiting block.

2. A double guide rod cylinder limiting mechanism according to claim 1, characterized in that: A first limiting groove is disposed on the bottom surface of the top end of the connecting block, and the first limiting block and the first limiting groove are installed by interference fit.

3. A double-guide-rod cylinder limiting mechanism according to claim 1, characterized in that: The connecting plate is provided with a second limiting groove, and the second limiting block is installed in an interference fit with the second limiting groove.

4. A double-guide-rod cylinder limiting mechanism according to claim 1, characterized in that: The bottom surface of the first limiting block is provided with a groove, and the second limiting block is provided with a convex portion corresponding to the groove.

5. A double-guide-rod cylinder limiting mechanism according to claim 4, characterized in that: The side wall surface of the groove and the corresponding side wall surface of the convex portion are both inclined surfaces.

6. A double-guide-rod cylinder limiting mechanism according to claim 2, characterized in that: A protrusion is provided on the top of the first limiting block, and the first limiting block is installed by interference fit between the protrusion and the first limiting groove.

7. A double-guide-rod cylinder limiting mechanism according to claim 1, characterized in that: The first limiting block and the second limiting block are both cylindrical structures, and the centers of the first limiting block and the second limiting block are both provided with through screw holes.

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