Air chuck with rear inlet

Abstract

This utility model provides a pneumatic chuck with a rear-mounted air inlet, including a base, two sets of grippers, a cylinder, a transmission mechanism, a rotary drive mechanism, two cylinder air inlets, and first and second air passages connecting the two cylinder air inlets to the cylinder air. The chuck also includes a second rotating spindle, bearings, a slewing support, and a slewing mechanism with second sealing rings. The second rotating spindle is rotatably mounted within the base, with its right end, whose outer diameter is significantly reduced, extending rearward from the base. The outer circumference of the right end of the second rotating spindle has two inlet and outlet air ring grooves communicating with the first and second air passages respectively. The slewing support is mounted on the outer circumference of the right end of the second rotating spindle via two bearings. Four second sealing rings are disposed between the right end of the second rotating spindle and the slewing support. The two cylinder air inlets are airtightly fixed to the slewing support and communicate with the first and second air passages respectively. This utility model, through structural improvements, can save maintenance costs and increase production efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of auxiliary tools for laser tube cutting production lines, specifically to a pneumatic chuck with a rear-mounted air inlet. Background Technology

[0002] A chuck is an essential auxiliary tool on a laser cutting production line for clamping workpieces. Based on the different driving forces of the grippers, chucks are mainly divided into pneumatic chucks and electric chucks, with pneumatic chucks being more commonly used. A common pneumatic chuck has the following structure: Figure 1 and Figure 2 As shown (see also the pneumatic chuck disclosed in patent document CN216882289U), it includes a base 1 serving as the mounting base, two sets of grippers 2 (one set vertically and one set horizontally) for clamping the workpiece, a cylinder 3 for driving the two sets of grippers 2, a transmission mechanism 4 disposed between the cylinder 3 and the two sets of grippers 2, and a rotary drive mechanism for driving the two sets of grippers 2 to rotate while clamping the workpiece. The rotary drive mechanism includes a rotary drive gear 5 and a first rotary spindle 6, which is rotatably disposed within the base 1 and has two air inlet and outlet ring grooves on its outer periphery, and is connected to the rotary drive gear 5 for transmission. The air inlet and outlet of the cylinder 3 are provided by two... A cylinder vent 71 fixedly mounted on the machine base 1 and each cylinder vent 71 connected to an inlet / outlet air ring groove of the first rotating spindle 6 are connected to the first air passage q1 and the second air passage q2 of the first rotating spindle 6. The chuck is also provided with a third air passage q3 along the axial center line, which passes through the axis of the first rotating spindle 6 in the left and right directions and is used to blow away dust between the jaws 2 during processing. A first chip blowing nozzle 72 is provided at the outer end of the first rotating spindle 6 connected to the third air passage q3. In order to achieve air sealing of the air inlet and outlet parts between the machine base 1 and the first rotating spindle 6, at least three first sealing rings 8 (two on both sides of the inlet / outlet air groove rings) need to be provided between the machine base 1 and the first rotating spindle 6. The existing pneumatic chucks of this type have the following problems: because the diameter of the first rotating spindle 6 is relatively large, the inner diameter of the first sealing ring 8 is also relatively large. As a result, during operation, the first rotating spindle 6 has a faster linear velocity relative to the inner ring of the first sealing ring 8, which causes the first sealing ring 8 to wear out quickly. This requires frequent shutdowns for replacement, which seriously affects production efficiency and increases maintenance costs. Furthermore, since the first sealing ring 8 is located inside the machine base 1, many components need to be disassembled for replacement, which is very time-consuming and labor-intensive. Utility Model Content

[0003] The purpose of this invention is to provide a pneumatic chuck with an improved structure and a rear-mounted air inlet to solve the problems existing in the prior art.

[0004] The technical solution of this utility model is as follows: The pneumatic chuck with a rear-mounted air inlet includes a base serving as the mounting foundation, two sets of grippers for holding the workpiece during operation, a cylinder for driving the two sets of grippers, a transmission mechanism located between the cylinder and the two sets of grippers, a rotary drive mechanism including a rotary drive gear for driving the two sets of grippers to rotate, two cylinder air inlets for the cylinder to enter and exit, and a first air passage and a second air passage connecting the two cylinder air inlets to the cylinder air. Its structural feature is that it also includes a rotary mechanism, which includes a second rotating spindle, bearings, a rotary support, and a second sealing ring; the second rotating spindle is rotatably mounted on the base. The first and second air passages are connected to the drive gear to form a rotary drive mechanism. The first and second air passages are located inside the second rotating spindle. The right end of the second rotating spindle extends to the rear of the machine base, and the outer diameter of the right end of the second rotating spindle is smaller than the outer diameter of the second rotating spindle inside the machine base. The outer circumference of the right end of the second rotating spindle is provided with two inlet and outlet air ring grooves that communicate with the first and second air passages respectively. The slewing bearing is located on the outer circumference of the right end of the second rotating spindle through two bearings. Four second sealing rings are provided between the right end of the second rotating spindle and the slewing bearing. The two cylinder air vents are airtightly fixed on the slewing bearing and communicate with the first and second air passages respectively.

[0005] A further solution is that the second rotating spindle is also provided with a third air passage for blowing away dust and debris between the grippers during operation, and the outer periphery of the right end of the second rotating spindle is also provided with an inlet and outlet air ring groove that communicates with the first air passage; the slewing support is also airtightly fixedly provided with a second dust blowing nozzle that communicates with the third air passage.

[0006] This utility model has positive effects: Through structural improvements, especially by placing the air inlet and outlet of the cylinder, which serves as the power source, at the rear end of the machine base and correspondingly improving the air passage, this utility model eliminates the need for a sealing ring inside the machine base, as required by existing technologies. This effectively solves the technical problems of existing technologies, such as the rapid wear of the sealing ring, the need for frequent shutdowns for replacement, which seriously affects production efficiency and increases maintenance costs, and the time-consuming and labor-intensive process of disassembling many components when replacing the sealing ring, which is located inside the machine base. Attached Figure Description

[0007] Figure 1 A schematic diagram of the overall structure of a common pneumatic chuck.

[0008] Figure 2 for Figure 1 The diagram shows a partial cross-sectional view of a common existing pneumatic chuck.

[0009] Figure 3 This is a schematic diagram of the overall structure of this utility model;

[0010] Figure 4 for Figure 3 A partial structural diagram;

[0011] Figure 5 for Figure 3 A schematic diagram of the overall structure of the slewing mechanism, which also shows the air nozzle connected to it;

[0012] Figure 6 for Figure 3 A cross-sectional view of the slewing mechanism, which also shows the air nozzle connected to it.

[0013] The reference numerals in the above figures are as follows:

[0014] 1. Base; 2. Gripper; 3. Cylinder; 4. Transmission mechanism; 5. Rotary drive gear; 6. First rotating spindle; 7. Air nozzle; 71. Cylinder vent; 72. First chip blowing nozzle; 73. Second chip blowing nozzle; q1. First air passage; q2. Second air passage; q3. Third air passage; 8. First sealing ring; 9. Rotary mechanism; 91. Second rotating spindle; 92. Bearing; 93. Rotary support; 94. Detailed Implementation

[0015] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0016] (Example 1)

[0017] See Figures 3 to 6 The pneumatic chuck with the air inlet located at the rear in this embodiment includes a base 1 serving as the mounting foundation, two sets of grippers 2 (one set vertically and one set horizontally) for clamping the workpiece, a cylinder 3 for driving the two sets of grippers 2, a transmission mechanism 4 disposed between the cylinder 3 and the two sets of grippers 2, a rotary drive mechanism including a rotary drive gear 5 for driving the two sets of grippers 2 to clamp the workpiece for rotary machining, an air nozzle 7 for ventilation, and a first air passage q1, a second air passage q2, and a third air passage q3; the air nozzle 7 includes two cylinder ventilation nozzles 71 and a second chip blowing nozzle 73; unlike the prior art, the pneumatic chuck with the air inlet located at the rear in this embodiment also includes a rotary mechanism 9.

[0018] The rotary mechanism 9 includes a second rotating spindle 91, a bearing 92, a rotary support 93, and a second sealing ring 94.

[0019] The second rotating spindle 91 is rotatably mounted inside the base 1 and is connected to the rotating drive gear 5 to form a rotating drive mechanism. The second rotating spindle 91 has a first air passage q1, a second air passage q2, and a third air passage q3, which are the same as in the prior art. The difference between the second rotating spindle 91 and the first rotating spindle 6 in the prior art is that the second rotating spindle 91 no longer has inlet and outlet air ring grooves on its outer periphery inside the base 1, and correspondingly, the first sealing ring 8 of the prior art is no longer provided between the base 1 and the second rotating spindle 91. The second rotating spindle 91 also has a longer right end extending towards the rear of the base 1 (i.e., the right side in the figure) compared to the first rotating spindle 6 in the prior art. The outer diameter of the right end of the second rotating spindle 91 extending outside the base 1 is significantly smaller than the outer diameter of the second rotating spindle 91 inside the base 1. The outer periphery of the right end of the second rotating spindle 91 has three inlet and outlet air ring grooves, which communicate with the first air passage q1, the second air passage q2, and the third air passage q3, respectively.

[0020] The slewing bearing 93 is mounted on the outer periphery of the right end of the second rotating spindle 91 via two bearings 92, thereby allowing the second rotating spindle 91 to rotate relative to the slewing bearing 93. Four second sealing rings 94 are provided between the right end of the second rotating spindle 91 and the slewing bearing 93, so that there are two second sealing rings 94 on both sides of each inlet and outlet air ring groove of the second rotating spindle 91 to achieve airtightness.

[0021] Two cylinder vent nozzles 71 are airtightly fixedly mounted on the slewing bearing 93 and are respectively connected to the first air passage q1 and the second air passage q2. The second chip blowing nozzle 73 is airtightly fixedly mounted on the slewing bearing 93 and is connected to the third air passage q3. It can be seen that the arrangement of the three nozzles 7 is different from the prior art. The two cylinder vent nozzles 71 are for the intake and exhaust of the cylinder 3 during operation, while the second chip blowing nozzle 73, when in operation, receives air and blows away dust and debris between the grippers 2 through the third air passage q3. In other words, the function of the three nozzles 7 is the same as in the prior art.

[0022] As can be seen from the foregoing, since the outer diameter of the right end of the second rotating spindle 91 extending outside the base 1 is significantly smaller than the outer diameter of the second rotating spindle 91 inside the base 1, the inner diameter of the second sealing ring 94 is significantly smaller than the inner diameter of the first sealing ring 8 located at the outer end of the first rotating spindle 6 in the prior art. When the rotational speed of the second rotating spindle 91 is the same as that of the first rotating spindle 6 in the prior art, the linear velocity of the right end of the second rotating spindle 91 relative to the inner ring of the second sealing ring 94 is greatly reduced. As a result, the wear rate of the second sealing ring 94 is significantly reduced compared to the prior art, and the replacement time of the second sealing ring 94 is significantly extended. Furthermore, compared to the prior art where the first sealing ring 8 is located inside the base 1 and is very troublesome to replace, in this embodiment, the replacement of the second sealing ring 94 only requires removing the slewing bearing 93, which is very convenient. Therefore, it can effectively solve the technical problems in the prior art where the first sealing ring 8 wears quickly, requires frequent machine shutdowns for replacement, seriously affects production efficiency and increases maintenance costs, and the replacement of the first sealing ring 8, which is located inside the machine base 1, requires the disassembly of many components, which is very time-consuming and labor-intensive.

[0023] The above embodiments are descriptions of specific implementations of this utility model, and not limitations thereof. Those skilled in the art can make various changes and modifications to obtain corresponding equivalent technical solutions without departing from the spirit and scope of this utility model. Therefore, all equivalent technical solutions should be included in the patent protection scope of this utility model.

Claims

1. A pneumatic chuck with a rear-mounted air inlet, comprising a base serving as a mounting foundation, two sets of grippers for holding a workpiece during operation, a cylinder for driving the two sets of grippers, a transmission mechanism disposed between the cylinder and the two sets of grippers, a rotary drive mechanism including a rotary drive gear for driving the two sets of grippers to rotate, two cylinder vents for air intake and exhaust from the cylinder, and a first air passage and a second air passage connecting the two cylinder vents to the cylinder air, characterized in that: It also includes a rotary mechanism, which comprises a second rotating spindle, bearings, a rotary support, and a second sealing ring. The second rotating spindle is rotatably mounted within the base and is connected to the drive gear to form a rotary drive mechanism. The first and second air passages are located within the second rotating spindle. The right end of the second rotating spindle extends rearward from the base, and the outer diameter of the right end of the second rotating spindle is smaller than the outer diameter of the second rotating spindle within the base. The outer periphery of the right end of the second rotating spindle is provided with two inlet and outlet air ring grooves that communicate with the first and second air passages, respectively. The rotary support is mounted on the outer periphery of the right end of the second rotating spindle via two bearings. Four second sealing rings are provided between the right end of the second rotating spindle and the rotary support. Two cylinder vents are airtightly fixed on the rotary support and communicate with the first and second air passages, respectively.

2. The pneumatic chuck with a rear-mounted air inlet according to claim 1, characterized in that: The second rotating spindle is also provided with a third air passage for blowing away dust and debris between the grippers during operation. The outer periphery of the right end of the second rotating spindle is also provided with an inlet and outlet air ring groove that communicates with the first air passage. The slewing support is also airtightly fixed with a second dust blowing nozzle that communicates with the third air passage.

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