Pneumatic radial floating seat

Abstract

The utility model relates to robot automation polishing technical field discloses a kind of pneumatic radial floating seat, including fixed seat, floating seat, cylinder driving assembly and cone swing mechanism;The fixed seat is connected with mounting base;The floating seat is connected with fixed seat by cone swing mechanism, and can be relative fixed seat and do cone swing;The cylinder driving assembly includes cylinder body seat, multiple plunger cylinder sleeve, the plunger corresponding with the number of plunger cylinder sleeve and cylinder upper cover;The cylinder body seat is fixed on fixed seat, the plunger cylinder sleeve is installed in cylinder body seat, and the plunger is set in plunger cylinder sleeve with clearance fit.This utility model replaces traditional piston cylinder with multiple independent, low-friction plunger cylinder.The clearance fit between plunger and plunger cylinder sleeve and groove design, while guaranteeing basic air tightness, greatly reduce movement resistance, avoid the "creep" and jamming phenomenon of traditional piston cylinder under low pressure.

Description

Technical Field

[0001] This utility model relates to the field of robotic automated grinding technology, specifically a pneumatic radial floating seat. Background Technology

[0002] In manufacturing, die casting or mold forming inevitably produces burrs such as risers and grommetes. To ensure the quality of subsequent processing and finished products, these burrs must be removed in the preceding process. Automated mechanical deburring devices are widely used due to their high efficiency and stable quality, and are mainly divided into rigid deburring devices and flexible deburring devices.

[0003] Pneumatic radial floating grinding devices are a mainstream flexible deburring tool. They typically consist of one or more cylinders (piston type) arranged in a ring, driven by compressed air to passively provide radial grinding force through a conical oscillating mechanism, adapting to irregularities on the workpiece surface. This oscillating mechanism is usually composed of ball joints or slide rails, allowing grinding tools such as electric spindles and engraving machines mounted within it to oscillate at small angles (±5°) within a 360° range. These devices are often installed at the end effector of industrial robots, operating in harsh environments with high dust and high humidity.

[0004] However, existing pneumatic radial floating devices suffer from numerous inherent drawbacks, severely limiting their performance, reliability, and application cost. These drawbacks are as follows:

[0005] First, traditional grinding devices generally use piston cylinders as the drive source. Piston cylinders rely on the interference fit between the seals and the cylinder body to ensure airtightness, which results in significant motion resistance and static friction. When operating at lower air pressures (e.g., 0.5-6.0 bar), jamming or "creeping" phenomena are prone to occur, causing unstable radial grinding force and making it difficult to maintain a constant grinding torque. This not only leads to incomplete grinding of the workpiece and poor surface uniformity but may also damage the grinding tools (cutting tools), shortening their service life.

[0006] Secondly, existing cylinder designs are mostly monolithic components, requiring the machining of multiple precision holes for mounting pistons and cylinders. This structure is difficult to manufacture, requiring multiple clamping operations or the use of four-axis or higher machine tools. If heat treatment is necessary, ensuring precision becomes even more challenging, hindering mass production. Monolithic cylinder bodies typically use high-hardness steel for wear resistance, resulting in excessive weight, which is unsuitable for installation on robot end effectors. Using non-ferrous metals, however, is costly or not wear-resistant. Furthermore, repairing and replacing a damaged cylinder is difficult and costly.

[0007] Finally, the conical oscillating mechanism of the device also has problems. A common structure involves steel balls sliding directly within grooves machined from the body material. To enhance wear resistance, the grooves need to be made of high-hardness material, but this also increases the machining difficulty and the overall mass of the oscillating body. The greater the mass of the oscillating body, the greater its inertia, resulting in sluggish device movement, insufficient responsiveness, and an inability to quickly adapt to changes in the workpiece surface. If the entire oscillating mechanism is machined as a single piece, once the grooves wear out, the entire core component becomes unusable, leading to extremely high maintenance costs.

[0008] Therefore, based on the above-mentioned technical problems, it is necessary for those skilled in the art to develop a pneumatic radial floating seat. Utility Model Content

[0009] The purpose of this invention is to provide a pneumatic radial floating seat to solve the problems mentioned in the background art.

[0010] To achieve the above objectives, this utility model provides the following technical solution:

[0011] A pneumatic radial floating seat technical solution includes a fixed seat, a floating seat, a cylinder drive assembly, and a cone swing mechanism;

[0012] The fixing seat is connected to the mounting base;

[0013] The floating seat is connected to the fixed seat through a conical swing mechanism and can swing conically relative to the fixed seat;

[0014] The cylinder drive assembly includes a cylinder block seat, multiple plunger cylinder sleeves, plungers corresponding to the number of plunger cylinder sleeves, and a cylinder top cover.

[0015] The cylinder block seat is fixed on the fixed seat, the plunger cylinder liner is installed in the cylinder block seat, and the plunger is disposed in the plunger cylinder liner with clearance fit.

[0016] The cylinder top cover is connected to the cylinder body seat and together they form a sealed annular chamber, which is connected to an external air source through an air inlet connector.

[0017] One end of the plunger extends into the annular cavity to bear the air pressure thrust, while the other end has a ball head structure that acts on the wear-resistant plate fixedly connected to the floating seat.

[0018] The conical swing mechanism includes a slide rail fixed on a fixed base, a friction-reducing column embedded in a floating base, and steel balls;

[0019] The slide rail is fixed by a slide rail fixing ring, which has a semi-cylindrical groove.

[0020] The friction-reducing column is provided with a ball socket and an oil storage hole;

[0021] One side of the steel ball is embedded in the ball socket of the friction-reducing column, and the other side rolls in cooperation with the semi-cylindrical groove on the slide rail.

[0022] The front end of the floating seat is provided with a fixed sleeve for clamping the spindle;

[0023] The pneumatic radial floating seat is also equipped with a dustproof structure consisting of an upper dust cover and a lower dust cover.

[0024] As a preferred technical solution, the plunger's cylindrical surface is provided with an annular groove.

[0025] As a preferred technical solution, the cylinder block seat and cylinder top cover are made of aluminum alloy; the plunger cylinder liner and plunger are made of alloy steel.

[0026] As a preferred technical solution, the wear-resistant plate is an alloy structural steel plate with a thickness of 1-3mm.

[0027] As a preferred technical solution, the slide rail is made of high-hardness alloy steel and its surface is precision ground, and the friction-reducing column is made of self-lubricating wear-resistant material.

[0028] As a preferred technical solution, a plurality of plunger cylinder liners and plungers are evenly distributed along the circumferential direction of the cylinder block seat, and the plunger cylinder liners and the cylinder block seat adopt a transition fit and are sealed by structural adhesive.

[0029] Compared with the prior art, the beneficial effects of this utility model are:

[0030] (1) This utility model uses multiple independent, low-friction plunger cylinders to replace traditional piston cylinders. The clearance fit and groove design between the plunger and the plunger cylinder liner ensure basic airtightness while greatly reducing motion resistance, avoiding the "creeping" and jamming phenomena of traditional piston cylinders under low pressure. This enables the device to provide extremely stable and responsive radial thrust, thereby ensuring that the grinding torque acting on the workpiece remains basically constant throughout the entire swing range of 0-5°. As a result, the surface of the workpiece being ground is more uniform, the amount of material removed is more uniform and controllable, and the product yield is significantly improved.

[0031] (2) This utility model innovatively replaces traditional sliding friction with rolling friction. Specifically, through the precise cooperation of a high-hardness slide rail, a friction-reducing column with an oil reservoir, and steel balls, the frictional resistance is reduced by tens of times compared to the traditional structure. The extremely low friction means that the floating seat can instantly generate a tiny displacement when subjected to external force, with extremely low response delay. This high sensitivity allows the floating seat to quickly adapt to irregular changes in the workpiece surface, and it is particularly good at handling workpieces with complex curved surfaces or uneven burr distribution, thereby obtaining a better grinding effect.

[0032] (3) This utility model effectively overcomes a series of technical bottlenecks in traditional pneumatic radial floating devices, such as unstable output torque, slow response, bulky, difficult processing and high maintenance costs. It provides a high-performance, high-reliability, lightweight and economical high-quality solution, which has extremely high practical value and market competitiveness in the field of robotic automated grinding. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the cross-sectional structure of a pneumatic radial floating seat;

[0034] Figure 2 This is a schematic diagram of the motion state structure of a pneumatic radial floating seat.

[0035] In the attached diagram, the following are the reference numerals: 1. Cylinder top cover; 2. Plunger cylinder liner; 3. Sealing ring; 4. Plunger; 5. Cylinder body seat; 6. Mounting base; 7. Slide rail fixing ring; 8. Slide rail; 9. Floating seat; 10. Fixed sleeve; 11. Anti-friction column; 12. Steel ball; 13. Lower dust cover; 14. Fixed seat; 15. Wear-resistant plate; 16. Air inlet connector; 17. Upper dust cover; 18. Spindle. Detailed Implementation

[0036] The features and exemplary embodiments of various aspects of this utility model will now be described in detail. To make the objectives, technical solutions, and advantages of this utility model clearer, the following description, in conjunction with the accompanying drawings and specific embodiments, will provide a further detailed description. For those skilled in the art, this utility model can be implemented without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of this utility model by illustrating examples.

[0037] like Figure 1 , Figure 2 As shown, this utility model provides a pneumatic radial floating seat technical solution, including a fixed seat 14, a floating seat 9, a cylinder drive assembly, and a cone swing mechanism.

[0038] The fixed seat 14 is connected to the mounting base 6 to ensure a stable connection. The floating seat 9 is connected to the fixed seat 14 through a conical swing mechanism, allowing the floating seat 9 to swing conically relative to the fixed seat 14.

[0039] The cylinder drive assembly is one of the core components of this invention. It includes a cylinder block seat 5, multiple plunger cylinder sleeves 2, plungers 4 corresponding to the number of plunger cylinder sleeves 2, and a cylinder top cover 1. The cylinder block seat 5 is fixed on a fixed seat 14, and the plunger cylinder sleeves 2 are installed inside the cylinder block seat 5. The plungers 4 are disposed within the plunger cylinder sleeves 2 with a clearance fit, ensuring that the plungers 4 can slide smoothly within the cylinder sleeves. The cylinder top cover 1 is connected to the cylinder block seat 5, together forming a sealed annular chamber. This annular chamber is connected to an external air source through an air inlet connector 16 to introduce compressed air to drive the movement of the plungers 4.

[0040] One end of the plunger 4 extends into the annular chamber to bear the air pressure thrust, while the other end is designed as a ball head structure, acting on the wear-resistant plate 15 fixedly connected to the floating seat 9. When compressed air enters the annular chamber, the plunger 4 is pushed outward by the air pressure thrust, and its ball head structure pushes the wear-resistant plate 15, thereby causing the floating seat 9 to swing.

[0041] The conical oscillating mechanism is another key component of this invention. It includes a slide rail 8 fixed to a fixed base 14, a friction-reducing column 11 embedded in a floating base 9, and steel balls 12. The slide rail 8 is fixed to the fixed base 14 by a slide rail fixing ring 7 and has a semi-cylindrical groove. The friction-reducing column 11 has a ball socket and an oil storage hole. One side of the steel ball 12 is embedded in the ball socket of the friction-reducing column 11, and the other side rolls in contact with the semi-cylindrical groove on the slide rail 8. This design transforms traditional sliding friction into rolling friction, greatly reducing frictional resistance and improving the response speed and sensitivity of the device.

[0042] The front end of the floating seat 9 is provided with a fixed clamp 10 for holding the spindle 18, so as to install grinding tools for deburring operations. In addition, the pneumatic radial floating seat is also provided with a dustproof structure consisting of an upper dust cover 17 and a lower dust cover 13, which effectively prevents dust and other impurities from entering the device and affecting its normal operation.

[0043] The materials and dimensions of each component can be selected and adjusted according to actual needs. The plunger 4's surface can be provided with annular grooves to further optimize its sealing performance and motion characteristics. The cylinder block seat 5 and cylinder cover 1 can be made of aluminum alloy to reduce the overall weight of the device; the plunger cylinder liner 2 and plunger 4 can be made of alloy steel to improve their wear resistance and service life. The wear-resistant plate 15 can be made of alloy structural steel plate with a thickness of 1 to 3 mm to ensure sufficient strength and wear resistance. The slide rail 8 can be made of high-hardness alloy steel and precision ground to improve its surface quality and motion accuracy; the friction-reducing column 11 can be made of self-lubricating wear-resistant material to further reduce frictional resistance.

[0044] Multiple plunger liners 2 and plungers 4 can be evenly distributed along the circumference of the cylinder block seat 5 to ensure uniform force distribution in all directions. A transition fit can be used between the plunger liners 2 and the cylinder block seat 5, sealed with structural adhesive to ensure a stable connection and good sealing performance.

[0045] When using the pneumatic radial floating seat provided by this utility model for deburring, first, fix the device to the end effector of the industrial robot via the mounting base 6. Then, install the grinding tool (such as an electric spindle, a grinder, etc.) on the fixed sleeve 10 at the front end of the floating seat 9. Next, connect the device to an external air source via the air inlet connector 16 and adjust the air pressure to a suitable range.

[0046] During operation, the industrial robot moves the device to the vicinity of the workpiece surface. When the device contacts the workpiece surface, the floating seat 9 begins to oscillate in a conical motion under the action of the cylinder drive assembly. Simultaneously, the steel balls 12 in the conical oscillation mechanism roll and engage within the semi-cylindrical grooves on the slide rail 8, allowing the floating seat 9 to quickly adapt to irregular changes in the workpiece surface. During the grinding process, the stable and responsive radial thrust provided by the device ensures better workpiece surface consistency and more uniform and controllable removal of material.

[0047] After deburring is completed in one area, the industrial robot moves the device to the next work area to continue the operation. Throughout the entire process, the dustproof structure effectively prevents dust and other impurities from entering the device, ensuring its normal operation and long-term stability.

[0048] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

[0049] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0050] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0051] The embodiments described above are not exhaustive, nor do they limit the invention to specific implementations. Clearly, many modifications and variations can be made based on the above description. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of the invention, enabling those skilled in the art to effectively utilize the invention and its modifications. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the invention should be included within the protection scope of the invention.

Claims

1. A pneumatic radial floating seat, characterized in that, Includes a fixed seat (14), a floating seat (9), a cylinder drive assembly, and a cone swing mechanism; The fixed seat (14) is connected to the mounting base (6); The floating seat (9) is connected to the fixed seat (14) through a cone swing mechanism and can swing in a cone shape relative to the fixed seat (14); The cylinder drive assembly includes a cylinder block seat (5), multiple plunger cylinder sleeves (2), plungers (4) corresponding to the number of plunger cylinder sleeves (2), and a cylinder top cover (1); The cylinder block seat (5) is fixed on the fixed seat (14), the plunger cylinder sleeve (2) is installed in the cylinder block seat (5), and the plunger (4) is disposed in the plunger cylinder sleeve (2) with clearance fit. The cylinder cover (1) is connected to the cylinder body seat (5) and together they form a sealed annular chamber. The annular chamber is connected to an external air source through an air inlet connector (16). One end of the plunger (4) extends into the annular cavity to bear the air pressure thrust, and the other end is a ball head structure that acts on the wear-resistant plate (15) fixedly connected to the floating seat (9); The cone swing mechanism includes a slide rail (8) fixed on a fixed base (14), a friction-reducing column (11) embedded in a floating base (9), and steel balls (12); The slide rail (8) is fixed by a slide rail fixing ring (7), which has a semi-cylindrical groove. The friction-reducing column (11) is provided with a ball socket and an oil storage hole; One side of the steel ball (12) is embedded in the ball socket of the friction-reducing column (11), and the other side is in rolling contact with the semi-cylindrical groove on the slide rail (8); The floating seat (9) has a fixed sleeve (10) at its front end for clamping the spindle (18); The pneumatic radial floating seat is also provided with a dustproof structure consisting of an upper dust cover (17) and a lower dust cover (13).

2. The pneumatic radial floating seat according to claim 1, characterized in that: The plunger (4) has an annular groove on its cylindrical surface.

3. A pneumatic radial floating seat according to claim 1, characterized in that: The cylinder block seat (5) and cylinder cover (1) are made of aluminum alloy; the plunger cylinder liner (2) and plunger (4) are made of alloy steel.

4. A pneumatic radial floating seat according to claim 1, characterized in that: The wear-resistant plate (15) is an alloy structural steel plate with a thickness of 1-3 mm.

5. A pneumatic radial floating seat according to claim 1, characterized in that: The slide rail (8) is made of high-hardness alloy steel and its surface is precision ground. The friction-reducing column (11) is made of self-lubricating and wear-resistant material.

6. A pneumatic radial floating seat according to claim 1, characterized in that: Multiple plunger cylinder liners (2) and plungers (4) are evenly distributed along the circumference of the cylinder block seat (5). The plunger cylinder liners (2) and the cylinder block seat (5) are fitted with a transition fit and sealed with structural adhesive.

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