Chuck with double-sided jaw structure

Abstract

The present invention relates to the field of clamping equipment, and in particular to a chuck having a double-sided claw structure, wherein a sealing mechanism is provided on a housing, the sealing mechanism comprising a sealing support ring and an airtight sealing ring, a mounting step being provided on the inner side of the sealing support ring, the airtight sealing ring being mounted on the mounting step, a first axial sealing ring being provided on the connecting surface between the airtight sealing ring and the mounting step, a second axial sealing ring being provided on the end of the sealing support ring away from the mounting step, a plurality of radial sealing strips being provided on the inner side surface of the sealing support ring, and an air guide groove being provided between the radial sealing strips and the inner side surface of the sealing support ring. The present invention improves the sealing mechanism of the chuck, supplies air to the driving cylinder of the chuck without affecting the rotation of the chuck, has a simple structure, greatly reduces the axial distance of the chuck, occupies less space, and has better structural stability, thereby ensuring sealing performance even with long-term use.

Description

Technical Field

[0001] The present invention relates to the field of clamping equipment, in particular to a chuck with a double-sided clamping claw structure. Background Art

[0002] With the growing market for laser tube cutting machines, pneumatic chucks are being used more and more. In the past, they were sealed directly with sealing rings, but over time, the sealing rings are prone to wear and aging. The chuck sealing mechanism in the prior art has a chuck rotating axial sealing structure with patent number CN201721927606.5, which achieves sealing through the structure of an inner sleeve and an outer sleeve. However, this structure is complex and requires the addition of bearings, which also increases the axial length of the entire chuck, increasing the space occupied by the chuck to a certain extent. Moreover, the sealing performance of this structure is very poor, and long-term use is prone to air leakage and other problems that affect the accuracy of the chuck. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a chuck with a double-sided clamping claw structure, which is small in size, simple in structure and has good sealing performance.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows: A chuck with a double-sided claw structure includes a chuck body, a housing, a driving mechanism, a rotating mechanism and a bearing, the chuck body and its claw assembly are provided on both axial sides of the housing, the driving mechanism is installed in the housing and can drive the opening and closing of the claw assembly, the rotating mechanism can drive the chuck body to rotate, the bearing is fixedly connected to the housing, and a sealing mechanism is provided on the housing, the sealing mechanism includes a sealing support ring and a gas sealing ring, the inner side of the sealing support ring is provided with a mounting step, the gas sealing ring is installed on the mounting step, and a first axial sealing ring is provided on the connecting surface of the gas sealing ring and the mounting step, and a second axial sealing ring is provided at the end of the sealing support ring away from the mounting step, a plurality of radial sealing strips are provided on the inner side surface of the sealing support ring, and an air guide groove is provided between the radial sealing strip and the inner side surface of the sealing support ring, a plurality of air inlet channels connected to the air guide groove are provided on the outer surface of the sealing support ring, and a plurality of air outlet channels connected to the air guide groove are provided on the inner side surface of the gas sealing ring.

[0005] In the above technical solution, the radial sealing strip includes a U-shaped body and connecting parts located on both sides of the U-shaped body. The radial sealing strip is embedded in the mounting groove on the inner side of the sealing support ring. A first buffer rib is provided at the outer periphery of the air sealing ring at a position corresponding to the radial sealing strip. The first buffer ribs are arranged in pairs, and the first buffer ribs are offset against the U-shaped body, and the spacing between each pair of the first buffer ribs is less than the width of the U-shaped body.

[0006] In the above technical solution, the clamping claw assembly includes a sliding block, a fixed claw and a clamping piece. The fixed claw is fixedly arranged on one side of the sliding block close to the geometric center of the chuck body, and the clamping piece is installed on the end of the fixed claw.

[0007] In the above technical solution, the clamping member is a roller, which is movably connected to the end of the fixed claw, and both ends of the roller are movably connected to the end of the fixed claw through an eccentric sleeve.

[0008] In the above technical solution, the clamping member is a gasket, which is fixedly connected to the end of the fixing claw.

[0009] In the above technical solution, the driving mechanism includes a cylinder, a cylinder connecting part, an internal gear plate and a bridge gear set. The cylinder is fixedly connected to the chuck body through a mounting pin. A cylinder connecting part is provided on the output shaft of the cylinder. The cylinder connecting part and the internal gear plate are fixedly connected. The internal gear plate is transmission-connected to the bridge gear set. The sliding block is provided with a rack transmission-connected to the bridge gear set.

[0010] In the above technical solution, four cylinders are arranged in parallel in the housing, and each cylinder controls two symmetrical claw assemblies on the chuck body on the corresponding side.

[0011] In the above technical solution, the rotating mechanism includes a reducer and a driven gear thereof, and the driven gear is fixedly connected to the chuck body on one side.

[0012] In the above technical solution, two radial sealing strips parallel to each other are installed on the inner side surface of the sealing support ring.

[0013] In the above technical solution, a flange edge is provided on the air sealing ring, the flange edge is fixedly connected to the mounting step, and the first axial sealing ring is provided between the flange edge and the mounting step, and second buffer ribs are provided in pairs on the flange edge, the second buffer ribs are against the first axial sealing ring, and the spacing between each pair of the second buffer ribs is less than the width of the first axial sealing ring.

[0014] In summary, the technical solution of the present invention has the following beneficial effects compared with traditional technical means:

[0015] 1. The present invention improves the sealing mechanism of the chuck. By cooperating with a sealing support ring and an airtight sealing ring and adding an axial sealing ring and a radial sealing strip between the sealing support ring and the airtight sealing ring, a sealed air supply is achieved. Air is supplied to the driving cylinder of the chuck without affecting the rotation of the chuck. The structure is simple, the axial distance of the chuck is greatly reduced, the space occupied is small, the structural stability is improved, and the sealing performance can be guaranteed even in long-term use.

[0016] 2. The present invention adopts a single-layer cylinder structure, where one cylinder controls a pair of jaws, which reduces the axial length of the chuck and improves the linkage of the jaws. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the structure of the present invention after the chuck body is hidden;

[0019] Figure 3 for Figure 2 A partial enlarged schematic diagram;

[0020] Figure 4 It is a front view schematic diagram of the present invention;

[0021] Figure 5 It is a rear view schematic diagram of the present invention;

[0022] Figure 6 It is a side view schematic diagram of the present invention;

[0023] Figure 7 Based Figure 6 AA cross-sectional view of ;

[0024] Figure 8 Bit Figure 7 A partial enlarged schematic diagram;

[0025] Figure 9 is a three-dimensional schematic diagram of the sealing mechanism of the present invention;

[0026] Figure 10 It is a schematic front view of the sealing mechanism of the present invention;

[0027] Figure 11 for Figure 10 BB cross-sectional diagram;

[0028] Figure 12 for Figure 11 A partial enlarged schematic diagram;

[0029] Figure 13 is a three-dimensional schematic diagram of the sealing support ring in the present invention;

[0030] Figure 14 It is a main schematic diagram of the present invention;

[0031] Figure 15 Schematic diagram of the three-dimensional airtight ring of the present invention;

[0032] The numbers are as follows: 100, chuck body; 110, claw assembly; 111, sliding block; 112, fixed claw; 113, clamping member; 200, housing; 300, driving mechanism; 310, cylinder; 320, cylinder connector; 330, internal gear plate; 340, bridge gear set; 400, rotating mechanism; 410, speed reducer; 420, driven gear; 500, bearing; 510, bearing seat; 600, seal Mechanism; 610, sealing support ring; 611, mounting step; 612, air guide groove; 613, stopper; 620, air sealing ring; 621, flange; 622, first buffer rib; 623, second buffer rib; 631, first axial sealing ring; 632, second axial sealing ring; 640, radial sealing strip; 641, U-shaped body; 642, connecting portion; 650, air inlet channel; 660, air outlet channel; DETAILED DESCRIPTION

[0033] The present invention will be further described with reference to the following drawings:

[0034] like Figures 1 to 15 As shown, a chuck with a double-sided jaw structure includes a chuck body 100, a housing 200, a driving mechanism 300, a rotating mechanism 400 and a bearing 500. The chuck body 100 and its jaw assembly 110 are provided on both axial sides of the housing 200. The driving mechanism 300 is installed in the housing 200 and can drive the opening and closing of the jaw assembly 110. The rotating mechanism 400 can drive the chuck body 100 to rotate. The bearing 500 and its bearing seat 510 are fixedly connected to the housing 200. The housing 200 is provided with a sealing mechanism 600. The sealing mechanism 600 includes a sealing support ring 610 and an airtight sealing ring 620. The inner side of the sealing support ring 610 is provided with a mounting platform. Step 611, the air-sealing ring 620 is installed on the installation step 611, and a first axial sealing ring 631 is provided on the connecting surface of the air-sealing ring 620 and the installation step 611, and a second axial sealing ring 632 is provided on the end of the sealing support ring 610 away from the installation step 611, and a plurality of radial sealing strips 640 are installed on the inner side surface of the sealing support ring 610, and an air guide groove 612 is provided between the radial sealing strip 640 and the inner side surface of the sealing support ring 620, and a plurality of air inlet channels 650 connected to the air guide groove 610 are provided on the outer side surface of the sealing support ring 610, and a plurality of air outlet channels 660 connected to the air guide groove 612 are provided on the inner side surface of the air-sealing ring 620.

[0035] like Figure 2 As shown, the jaw assembly 110 includes a sliding block 111 , a fixed jaw 112 and a clamping member 113 . The fixed jaw 112 is fixedly disposed on one side of the sliding block 111 close to the geometric center of the chuck body 100 , and the clamping member 113 is mounted on the end of the fixed jaw 112 .

[0036] like Figure 1、 5 As shown, 2 to 6 movable grooves are evenly formed on the surface of the chuck body 100 and diverge from its geometric center to four directions, and the jaw assemblies 110 are movably arranged in the movable grooves respectively.

[0037] like Figure 1 The clamping part 113 is a roller, which is movably connected to the end of the fixed claw 112. The two ends of the roller are movably connected to the end of the fixed claw 112 through an eccentric sleeve. By adjusting the eccentric sleeve, the relative position of the roller and the fixed claw 112 can be changed to achieve a certain degree of fine-tuning. In actual use, the claw assembly 110 of the chuck body 100 on one side is installed with a pad, and the claw assembly 110 on the other side is installed with a roller. The roller can be pulled and pulled while limiting the pipe, so that the relative position of the pipe can be adjusted when one side of the pad is loosened.

[0038] like Figure 4 、 6 As shown, the driving mechanism 300 includes a cylinder 310, a cylinder connecting member 320, an internal gear disc 330 and a bridge gear set 340. The cylinder 310 is fixedly connected to the chuck body 100 by a mounting pin. A cylinder connecting member 320 is provided on the output shaft of the cylinder 310. The cylinder connecting member 320 and the internal gear disc 330 are fixedly connected. The internal gear disc 330 is transmission-connected to the bridge gear set 340. A rack is provided on the sliding block 111 that is transmission-connected to the bridge gear set 340. When in use, the output shaft of the cylinder 310 is ejected, and the cylinder connecting member 320 on the output shaft moves, thereby driving the internal gear disc 330 meshing with it to rotate. The sliding block 111 is provided with a rack that is transmission-connected to the bridge gear set 340, so the sliding block 111 will move accordingly, thereby realizing the opening and closing of the claws on the chuck body 100.

[0039] like Figure 2 As shown, four cylinders 310 are arranged in parallel in the housing 200, and each cylinder 310 controls two symmetrical jaw assemblies 110 on the corresponding side chuck body 100. The reasonable arrangement of the cylinders 310 greatly reduces the axial length of the entire chuck, and only one bearing 500 is needed, which saves space and a lot of costs. The linkage of the two corresponding jaw assemblies 110 controlled by one cylinder 310 is also stronger.

[0040] like Figure 7 、 8 As shown, the air used by the cylinder 310 enters the air cavity formed between the sealing support ring 610 and the axial sealing ring and the radial sealing ring through the air inlet on the sealing support ring 610. In this way, when the chuck rotates, the outer side of the sealing mechanism 600 rotates but the inner side does not, and the air guide pipe connecting the air cavity and the cylinder 310 will be affected by the rotation.

[0041] like Figure 2 、3 As shown, the rotating mechanism 400 includes a reducer 410 and a driven gear 420 thereof. The driven gear 420 is fixedly connected to the chuck body 100 on one side. When the rotating mechanism 400 is running, the reducer 410 drives the driven gear 420 to rotate and then drives the chuck bodies 100 on both sides to rotate, thereby adjusting the relative position of the clamped pipe.

[0042] like Figure 11 、 12 As shown, the radial sealing strip 640 includes a U-shaped body 641 and connecting parts 642 located on both sides of the U-shaped body 641. The radial sealing strip 640 is embedded in the air guide groove 612 on the inner side of the sealing support ring 610, and the notch of the air guide groove 612 is provided with a stop 613 that matches the connecting part 642. The connecting part 642 and the stop 613 are abutted against each other to ensure that the radial sealing strip 640 will not fall out of the air guide groove 612.

[0043] like Figure 14 、 15 As shown, a first buffer rib 622 is provided at a position corresponding to the radial sealing strip 640 on the outer periphery of the air sealing ring 620, and the first buffer ribs 622 are arranged in pairs, and the first buffer ribs 622 are against the U-shaped body 641, and the spacing between each pair of first buffer ribs 622 is smaller than the width of the U-shaped body 641. When the air pressure in the air guide groove 612 is too high, the U-shaped body 641 of the radial sealing strip 640 will swell to adapt to the excessive air pressure, and the first buffer rib 622 can then press against both sides of the U-shaped body 641, limiting it without affecting the deformation of the U-shaped body 641 to adapt to the air pressure, thereby preventing the radial sealing strip 640 from detaching.

[0044] like Figure 11 、 12 As shown in FIG. 13 , two radial sealing strips 640 parallel to each other are installed on the inner side surface of the sealing support ring 610 . The radial sealing strips 640 on the sealing support ring 610 are arranged in pairs, so that the sealing performance is better.

[0045] like Figure 14 、 15 As shown, the air sealing ring 620 is provided with a flange edge 621, which is fixedly connected to the mounting step 611, and a first axial sealing ring 631 is provided between the flange edge 621 and the mounting step 611, and second buffer ribs 623 are provided in pairs on the flange edge 621, and the second buffer ribs 623 are against the first axial sealing ring 631, and the spacing between each pair of second buffer ribs 623 is less than the width of the first axial sealing ring 631.

[0046] When the present invention is in use, the driving mechanism 300 transmits the transmission through the relevant components to control the opening and closing of the claw assembly 110 on the chuck body 100, and the rotating mechanism 400 controls the rotation of the chuck body 100 through the reducer 410 and its driven gear 420. The sealing mechanism 600 is fixedly connected to the driven gear 420. When the chuck body 100 rotates with the driven gear 420, the sealing mechanism 600 will also rotate, ensuring that the intake pipe of the cylinder 310 of the driving mechanism 300 will not be twisted or folded, thereby extending the service life of the intake pipe.

[0047] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A chuck with a double-sided jaw structure, comprising a chuck body (100), a housing (200), a driving mechanism (300), a rotating mechanism (400) and a bearing (500), wherein the chuck body (100) and its jaw assembly (110) are provided on both axial sides of the housing (200), the driving mechanism (300) is installed in the housing (200) and can drive the jaw assembly (110) to open and close, the rotating mechanism (400) can drive the chuck body (100) to rotate, and the bearing (500) is fixedly connected to the housing (200), characterized in that: The housing (200) is provided with a sealing mechanism (600), the sealing mechanism (600) comprising a sealing support ring (610) and an airtight sealing ring (620), the inner side of the sealing support ring (610) is provided with a mounting step (611), the airtight sealing ring (620) is mounted on the mounting step (611), and a first axial sealing ring (631) is provided on the connecting surface between the airtight sealing ring (620) and the mounting step (611), the sealing support ring (610) is away from the mounting step (611) and the mounting step (611) is provided with a first axial sealing ring (631). A second axial sealing ring (632) is provided at one end, a plurality of radial sealing strips (640) are installed on the inner side surface of the sealing support ring (610), and an air guide groove (612) is provided between the radial sealing strip (640) and the inner side surface of the sealing support ring (610), a plurality of air inlet channels (650) connected to the air guide groove (612) are provided on the outer side surface of the sealing support ring (610), and a plurality of air outlet channels (660) connected to the air guide groove (612) are provided on the inner side surface of the air sealing ring (620).

2. The chuck with a double-sided jaw structure according to claim 1, characterized in that: The radial sealing strip (640) includes a U-shaped body (641) and connecting portions (642) located on both sides of the U-shaped body (641). The radial sealing strip (640) is embedded in the mounting groove on the inner side of the sealing support ring (610). A first buffer rib (622) is provided at a position corresponding to the radial sealing strip (640) on the outer periphery of the airtight ring (620). The first buffer ribs (622) are arranged in pairs. The first buffer ribs (622) are against the U-shaped body (641), and the distance between each pair of the first buffer ribs (622) is smaller than the width of the U-shaped body (641).

3. The chuck with a double-sided jaw structure according to claim 1, characterized in that: The clamping claw assembly (110) includes a sliding block (111), a fixed claw (112) and a clamping member (113). The fixed claw (112) is fixedly arranged on one side of the sliding block (111) close to the geometric center of the chuck body (100), and the clamping member (113) is installed on the end of the fixed claw (112).

4. The chuck with a double-sided jaw structure according to claim 3, characterized in that: The clamping member (113) is a roller, which is movably connected to the end of the fixed claw (112), and both ends of the roller are movably connected to the end of the fixed claw (112) through an eccentric sleeve.

5. The chuck with a double-sided jaw structure according to claim 3, characterized in that: The clamping member (113) is a gasket, which is fixedly connected to the end of the fixing claw (112).

6. The chuck with a double-sided jaw structure according to claim 3, characterized in that: The driving mechanism (300) comprises a cylinder (310), a cylinder connector (320), an inner toothed disc (330) and a bridge gear set (340); the cylinder (310) is fixedly connected to the chuck body (100) via a mounting pin; a cylinder connector (320) is provided on the output shaft of the cylinder (310); the cylinder connector (320) and the inner toothed disc (330) are fixedly connected; the inner toothed disc (330) is transmission-connected to the bridge gear set (340); and a rack is provided on the sliding block (111) which is transmission-connected to the bridge gear set (340).

7. The chuck with a double-sided jaw structure according to claim 6, characterized in that: Four cylinders (310) are arranged in parallel in the housing (200), and each cylinder (310) controls two symmetrical claw assemblies (110) on the corresponding side chuck body (100).

8. The chuck with a double-sided jaw structure according to claim 1, characterized in that: The rotating mechanism (400) includes a speed reducer (410) and a driven gear (420) thereof, and the driven gear (420) is fixedly connected to a chuck body (100) on one side.

9. The chuck with a double-sided jaw structure according to claim 1, characterized in that: Two radial sealing strips (640) parallel to each other are mounted on the inner side surface of the sealing support ring (610).

10. The chuck with a double-sided jaw structure according to claim 1, characterized in that: The airtight ring (620) is provided with a flange edge (621), the flange edge (621) is fixedly connected to the installation step (611), and the first axial sealing ring (631) is provided between the flange edge (621) and the installation step (611), and second buffer ribs (623) are provided in pairs on the flange edge (621), the second buffer ribs (623) are against the first axial sealing ring (631), and the distance between each pair of the second buffer ribs (623) is smaller than the width of the first axial sealing ring (631).

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