Pneumatic positioning jig

Abstract

The utility model discloses a pneumatic positioning jig which comprises a plurality of rotary pressing air cylinders arranged beside a workpiece needing to be positioned and an adjusting valve communicated with the rotary pressing air cylinders through an air pipe, a multi-way pipe is arranged between the air pipe and the adjusting valve, and a sealing piece is connected between the multi-way pipe and the air pipe. The flaring part is arranged at the end, inserted into the multi-way pipe, of the air pipe, the sealing ring is arranged on the flaring part, the knob part extrudes the sealing ring, and the knob part is inserted into the multi-way pipe and is in threaded connection with the multi-way pipe. The flaring part is arranged at the connecting position of the air pipe and the multi-way pipe, the flaring part is inserted into the multi-way pipe, one face of the inserting end of the flaring part abuts against and is attached to the end wall of the multi-way pipe, the sealing ring is installed on the other face, and then the flaring part is connected with the multi-way pipe through the rotary knob piece. The flaring part and the sealing ring can be expanded through extrusion of the rotary knob piece to seal the communication position of the air pipe and the multi-way pipe, and the problem that the communication position of the air sealing pipe and the multi-way pipe is prone to air leakage after being used for a long time is solved.

Description

Technical Field

[0001] This utility model relates to the field of clamping fixtures, and in particular to a pneumatic positioning fixture. Background Technology

[0002] Pneumatic positioning fixtures are tooling devices that utilize pneumatic transmission technology to achieve precise positioning and reliable clamping of workpieces. In the welding field, they ensure accurate and stable positioning of weldments, facilitating assembly and welding while guaranteeing the structural accuracy of the weldments. Especially in large-scale production such as automobile manufacturing, welding fixtures have become indispensable process equipment, not only significantly improving production efficiency and reducing labor intensity, but also ensuring consistent product quality.

[0003] In practical applications, multiple pneumatic positioning fixtures are typically required to work together to ensure workpiece stability. To save costs, these fixtures often share a single regulating valve, with their movement controlled by the same air circuit. However, this design also has certain drawbacks: because multiple pipelines need to be branched through multi-port pipes, air leakage is prone to occur after long-term use, thus affecting the stability and accuracy of positioning. Therefore, optimizing the air circuit layout and improving sealing reliability are key to enhancing the long-term stability of pneumatic positioning fixtures. Utility Model Content

[0004] In view of this, the present invention addresses the deficiencies of the existing technology and its main purpose is to provide a pneumatic positioning fixture that solves the problem that when multiple pneumatic positioning fixtures work together, air leakage is likely to occur after long-term use due to the need for multiple pipelines to be diverted through multiple pipes, which in turn affects the stability and accuracy of positioning.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a pneumatic positioning fixture, comprising multiple rotary pressing cylinders disposed next to the workpiece to be positioned, and a regulating valve connected to the rotary pressing cylinders via an air pipe, a multi-port pipe disposed between the air pipe and the regulating valve, and a sealing element connecting the multi-port pipe and the air pipe, the sealing element comprising a flared portion disposed at the end of the air pipe inserted into the multi-port pipe, a sealing ring disposed on the flared portion, and a knob for squeezing the sealing ring, the knob being inserted into the multi-port pipe and connected by a thread.

[0006] Furthermore, the connection between the multi-port tube and the air tube is provided with an inner groove, the flared part and the knob are inserted into the inner groove, and the sealing ring is adapted to the inner groove.

[0007] Furthermore, the knob includes a pressure plate disposed on the side of the sealing ring away from the flared portion. The side of the pressure plate away from the flared portion is provided with a groove. One end of the knob is inserted into the groove, and the knob and the inner groove are threadedly connected.

[0008] Furthermore, the slide has a retaining edge, and the knob has an annular groove for accommodating the retaining edge.

[0009] Furthermore, the sealing ring is a rubber ring.

[0010] Furthermore, the rotary pressing cylinder is provided with a first air intake section and a second air intake section, and the air pipe includes a first pipe and a second pipe that are respectively connected to the first air intake section and the second air intake section. The first pipe is connected to the air outlet end of the regulating valve, and the second pipe is connected to the air return end of the regulating valve.

[0011] Furthermore, the multi-port pipe has a third pipe connected to the first pipe and a fourth pipe connected to the second pipe.

[0012] Furthermore, the air inlet end of the regulating valve is connected to an air inlet pipe.

[0013] Compared with the prior art, this utility model has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solution, by setting a flared part at the connection between the trachea and the multi-port tube, and inserting the flared part into the multi-port tube, with one side of the inserted end of the flared part abutting against and fitting against the end wall of the multi-port tube, and installing a sealing ring on the other side, and then connecting it to the multi-port tube through a knob, the flared part and the sealing ring can be expanded by the squeezing of the knob to seal the connection between the trachea and the multi-port tube, thereby solving the problem of air leakage that easily occurs at the connection between the trachea and the multi-port tube after long-term use.

[0014] To more clearly illustrate the structural features and effects of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0015] Figure 1 This is a diagram illustrating Embodiment 1 of this utility model.

[0016] Figure 2 This is a connection diagram of the multi-port tube and the air tube in Embodiment 1 of this utility model.

[0017] Figure 3 This is Embodiment 1 of the present utility model. Figure 2 Enlarged view of point A.

[0018] Explanation of reference numerals in the attached diagram:

[0019] Rotary downward pressing cylinder 10, first air intake section 11, second air intake section 12;

[0020] Trachea 20, First tube 21, Second tube 22;

[0021] Regulating valve 30, air inlet pipe 31;

[0022] Multi-port pipe 40, recessed groove 41, third pipe 42, fourth pipe 43;

[0023] Seal 50, flared part 51, sealing ring 52, knob 53, ring groove 531, pressure plate 54, slide groove 541, and retaining edge 5411. Detailed Implementation

[0024] Please refer to Figure 1-3 As shown, it illustrates the specific structure of a preferred first embodiment of the present invention, which is a pneumatic positioning fixture. It includes multiple rotary pressing cylinders 10 disposed next to the workpiece to be positioned, and a regulating valve 30 connected to the rotary pressing cylinders 10 via an air pipe 20. A multi-port pipe 40 is provided between the air pipe 20 and the regulating valve 30. A sealing member 50 is connected between the multi-port pipe 40 and the air pipe 20. The sealing member 50 includes a flared portion 51 disposed at the end of the air pipe 20 inserted into the multi-port pipe 40, a sealing ring 52 disposed on the flared portion 51, and a knob 53 for squeezing the sealing ring 52. The knob 53 is inserted into the multi-port pipe 40 and connected by threads. By providing a flared part 51 at the connection between the trachea 20 and the multi-port tube 40, and inserting the flared part 51 into the multi-port tube 40, with one side of the inserted end of the flared part 51 abutting against and fitting against the end wall of the multi-port tube 40, and installing a sealing ring 52 on the other side, and then connecting it to the multi-port tube 40 through a knob 53, the flared part 51 and the sealing ring 52 can be expanded by squeezing the knob 53 to seal the connection between the trachea 20 and the multi-port tube 40, thereby solving the problem of air leakage that easily occurs at the connection between the trachea 20 and the multi-port tube 40 after long-term use.

[0025] For example, the connection between the multi-port tube 40 and the air tube 20 is provided with an inner groove 41, the flared part 51 and the knob 53 are inserted into the inner groove 41, and the sealing ring 52 is adapted to the inner groove 41. The opening of the inner groove 41 is designed to accommodate the flared part 51 and the sealing ring 52, and to make the diameters of the air tube 20 and the multi-port tube 40 compatible, so as to ensure smooth gas flow.

[0026] For example, the knob 53 includes a pressure plate 54 disposed on the side of the sealing ring 52 away from the flared portion 51. The side of the pressure plate 54 away from the flared portion 51 is provided with a groove 541. One end of the knob 53 is inserted into the groove 541, and the knob 53 is threadedly connected to the inner groove 41. The pressure plate 54 is provided so that when the knob 53 enters the inner groove 41 along the thread, it will not drive the sealing ring 52 and the flared portion 51 to rotate, thereby ensuring the sealing performance of the sealing ring 52 and the flared portion 51.

[0027] For example, the slide 541 has a retaining edge 5411, and the knob 53 has an annular groove 531 for receiving the retaining edge 5411. The retaining edge 5411 restricts the portion of the knob 53 inserted into the slide 541, preventing the knob 53 from separating from the pressure plate 54, while the insertion of the annular groove 531 and the retaining edge 5411 further enhances the stability of the knob 53 and the pressure plate 54 after connection.

[0028] The sealing ring 52 is a rubber ring.

[0029] For example, the rotary pressing cylinder 10 is provided with a first air inlet 11 and a second air inlet 12. The air pipe 20 includes a first pipe 21 and a second pipe 22 that are respectively connected to the first air inlet 11 and the second air inlet 12. The first pipe 21 is connected to the air outlet of the regulating valve 30, and the second pipe 22 is connected to the air return of the regulating valve 30. As the regulating valve 30 rotates clockwise, gas enters the first pipe 21 and then enters the first air inlet 11 connected to the first pipe 21, driving the rotary pressing cylinder 10 to rotate and press down to contact the workpiece and position the workpiece. The regulating valve 30 resets counterclockwise, allowing gas to enter the second pipe 21 and then enter the second air inlet 12, driving the rotary pressing cylinder 10 to reset and release the workpiece.

[0030] The multi-port pipe 40 has a third pipe 42 connected to the first pipe 21 and a fourth pipe 43 connected to the second pipe 22.

[0031] The air inlet end of the regulating valve 30 is connected to the air inlet pipe 31.

[0032] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A pneumatic positioning fixture, comprising a plurality of rotary pressing cylinders (10) disposed beside the workpiece to be positioned, and a regulating valve (30) connected to the rotary pressing cylinders (10) via an air pipe (20), characterized in that: A multi-port pipe (40) is provided between the air pipe (20) and the regulating valve (30). A sealing element (50) is connected between the multi-port pipe (40) and the air pipe (20). The sealing element (50) includes a flared part (51) at the end of the air pipe (20) inserted into the multi-port pipe (40), a sealing ring (52) on the flared part (51), and a knob (53) that squeezes the sealing ring (52). The knob (53) is inserted into the multi-port pipe (40) and connected by threads.

2. The pneumatic positioning fixture according to claim 1, characterized in that: The connection between the multi-port tube (40) and the air tube (20) is provided with an inner groove (41), the flared part (51) and the knob (53) are inserted into the inner groove (41), and the sealing ring (52) is adapted to the inner groove (41).

3. A pneumatic positioning fixture according to claim 2, characterized in that: The knob (53) includes a pressure plate (54) disposed on the side of the sealing ring (52) away from the flared portion (51). The side of the pressure plate (54) away from the flared portion (51) is provided with a groove (541). One end of the knob (53) is inserted into the groove (541), and the knob (53) and the inner groove (41) are threaded together.

4. A pneumatic positioning fixture according to claim 3, characterized in that: The slide (541) has a retaining edge (5411), and the knob (53) has an annular groove (531) for receiving the retaining edge (5411).

5. A pneumatic positioning fixture according to claim 1, characterized in that: The sealing ring (52) is a rubber ring.

6. A pneumatic positioning fixture according to claim 1, characterized in that: The rotary pressing cylinder (10) is provided with a first air intake section (11) and a second air intake section (12). The air pipe (20) includes a first pipe (21) and a second pipe (22) that are respectively connected to the first air intake section (11) and the second air intake section (12). The first pipe (21) is connected to the air outlet of the regulating valve (30), and the second pipe (22) is connected to the air return end of the regulating valve (30).

7. A pneumatic positioning fixture according to claim 6, characterized in that: The multi-port pipe (40) has a third pipe (42) connected to the first pipe (21) and a fourth pipe (43) connected to the second pipe (22).

8. A pneumatic positioning fixture according to claim 6, characterized in that: The air inlet end of the regulating valve (30) is connected to the air inlet pipe (31).

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