Pneumatic chuck

Abstract

The utility model discloses a pneumatic chuck, and aims to overcome the defects in the control aspect caused by the fact that an existing chuck adopts belt transmission. The device comprises a flange seat, a bearing seat, a sliding sleeve and a transmission shaft, wherein the transmission shaft is fixedly connected with the sliding sleeve in the axial direction through a bearing and can rotate relative to the sliding sleeve; wherein one end of the transmission shaft is provided with a connecting hole which is thick outside and thin inside, the inner wall of the connecting hole is provided with a plurality of conical teeth which are distributed at equal intervals, the conical pneumatic safety chuck comprises a driving chuck and a driven chuck, the end, away from a flange seat, of a bearing seat of the driving chuck is open, the transmission shaft is slidably connected with a connecting shaft, and the connecting shaft is fixedly connected with a connecting flange. The outer wall of the connecting flange is arranged outside the bearing seat, and meshing teeth are arranged on the outer wall of the connecting flange. The structure that the outer portion is large, the inner portion is small and the inner wall is conical teeth avoids idle stroke, the precision of the device can be improved, and the precision of the safety chuck can be improved and continuous control can be achieved through driving in a tooth meshing mode.

Description

Technical Field

[0001] The utility model relates to a coiling device, and more specifically, to a pneumatic chuck. Background Art

[0002] A safety chuck is a general component used at the unwinding end and rewinding end of a coiling device. Its function is that a driving device drives the chuck to rotate, and the chuck drives the material roll to rotate, so as to realize unwinding (unloading) or rewinding (loading). When the material roll is used up or full, the chuck opens to remove the material roll. After replacing the material roll, the safety chuck clamps the rewinding roller to prevent the material roll from falling.

[0003] The existing chucks usually drive the drive shaft by means of a motor through a belt. This structure has the advantage of simple structure, but also has the disadvantages of poor precision and inability to perform continuous control.

[0004] This application aims at the deficiencies of the transmission structure of the existing unwinding and rewinding chucks, and provides a conical pneumatic safety chuck driven by gears to improve precision control and achieve continuous control. Summary of the Invention

[0005] The utility model overcomes the deficiencies in control brought by the existing chucks using belt drive, and provides a pneumatic chuck which can improve precision control and achieve continuous control.

[0006] To solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A pneumatic chuck, comprising:

[0008] A flange seat;

[0009] A bearing seat, coaxially arranged with and fixedly connected to the flange seat;

[0010] A sliding sleeve, slidably installed inside the flange seat and the bearing seat and forming a piston structure with the flange seat and the bearing seat, so as to be able to move relative to the flange seat and the bearing seat; and

[0011] A transmission shaft, axially fixedly connected to the sliding sleeve through a bearing and capable of relative rotation;

[0012] Wherein, one end of the transmission shaft is provided with a connecting hole that is thick outside and thin inside, and the inner wall of the connecting hole has a number of equally spaced conical teeth. The conical pneumatic safety chuck includes a driving chuck and a driven chuck. One end of the bearing seat of the driving chuck away from the flange seat is open. A connecting shaft is slidably connected to the transmission shaft. The connecting shaft is fixedly connected to a connecting flange. The outer wall of the connecting flange is arranged outside the bearing seat, and the outer wall of the connecting flange is provided with meshing teeth.

[0013] This application positions the sliding sleeve through the flange seat and the bearing seat to form a piston, realizing the axial feed of the transmission shaft connected to the sliding sleeve, thereby providing the functions of loosening and fixing the coiling shaft.

[0014] The connecting hole is used to connect and position the coiling shaft, and the tapered teeth on the inner wall of the connecting hole can achieve accurate positioning of the coiling shaft, avoiding the travel difference caused by the gap between the tapered teeth and the coiling shaft during rotation.

[0015] The connecting shaft and the transmission shaft can rotate synchronously and can also achieve relative movement along the axial direction. The connecting flange is a rotating body with a U-shaped cross-section. A toothed ring is fixedly connected to the edge of the connecting flange, and it is driven by meshing with the gear driven by the driving motor, thereby realizing the transmission of power. It has better precision compared with the belt transmission method and meets the requirements of manufacturing similar battery diaphragms.

[0016] Preferably, the inner wall of the flange seat is provided with a piston ring groove. The flange seat is provided with a first air port and a second air port at positions corresponding to the piston ring groove. The first air port and the second air port are respectively located at different positions in the length direction of the flange seat. The sliding sleeve is provided with an annular separating flange, and the separating flange divides the piston ring groove into two chambers respectively connected to the first air port and the second air port. The piston structure is realized by driving the sliding sleeve and the corresponding structures that move synchronously with the sliding sleeve through the pressure difference between the chambers respectively connected to the first air port and the second air port.

[0017] Preferably, along the radial direction, the separating convex ring includes an outer part and an inner part of the separating convex ring, and the wall thickness of the outer part of the separating convex ring is smaller than that of the inner part of the separating convex ring. This structure avoids the separating convex ring aligning the second air port and the first air port, resulting in too small an axial area and the pressure difference being unable to generate enough force to push the sliding sleeve to move.

[0018] Preferably, the sliding sleeve and the flange seat are hermetically connected through a seal. The seal improves the sealing performance of the piston structure.

[0019] Preferably, the transmission shaft and the connecting shaft are connected by splines. The splines are used to achieve synchronous rotation and axial relative displacement of the transmission shaft and the connecting shaft.

[0020] Preferably, the cross-section of the tapered teeth is triangular. This structure is used to avoid the occurrence of idle stroke.

[0021] Preferably, a lifting ring is fixedly connected to the flange seat. This structure makes the device easy to handle.

[0022] Compared with the prior art, the beneficial effects of the present utility model are:

[0023] (1) The structure with an outer large and inner small shape and tapered teeth on the inner wall avoids the occurrence of idle stroke and can improve the precision of the device;

[0024] (2) By driving through the tooth meshing method, the accuracy of the safety chuck can be improved and continuous control can be achieved. Brief Description of the Drawings

[0025] Figure 1 is a sectional view of the active chuck of the present utility model;

[0026] Figure 2 is an exploded view of the sectional view of the active chuck of the present utility model;

[0027] Figure 3 is a sectional view of the driven chuck of the present utility model;

[0028] In the figure:

[0029] Flange seat 1, first air port 11, second air port 12, piston ring groove 13, lifting ring 14, bearing seat 2, sliding sleeve 3, separating flange 32, outer separating ring 321, inner separating ring 322, seal 33, transmission shaft 4, connecting hole 41, bevel gear 42, spline 43, connecting shaft 5, connecting flange 6, meshing teeth 61. Detailed Embodiment

[0030] The present disclosure will be further described below in conjunction with the drawings and embodiments.

[0031] It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs.

[0032] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0033] In the present disclosure, terms such as "fixed connection", "connected", "connected" should be understood in a broad sense, which may mean a fixed connection, an integral connection or a detachable connection; it may be directly connected or indirectly connected through an intermediate medium. For those skilled in the relevant scientific research or technology in this field, the specific meanings of the above terms in the present disclosure can be determined according to specific circumstances and should not be construed as a limitation to the present disclosure.

[0034] Embodiment:

[0035] A pneumatic chuck, referring to Figure 1 、 3 shown, includes:

[0036] Flange seat 1;

[0037] Bearing seat 2, coaxially arranged with and fixedly connected to the flange seat 1;

[0038] Sliding sleeve 3, slidably installed inside the flange seat 1 and the bearing seat 2 and forming a piston structure with the flange seat 1 and the bearing seat 2, so as to be able to move relative to the flange seat 1 and the bearing seat 2;

[0039] Drive shaft 4, the drive shaft 4 is fixedly connected to the sliding sleeve 3 in the axial direction through a bearing and can rotate relatively;

[0040] See Figure 1 , 2 , wherein, one end of the drive shaft 4 is provided with a connecting hole 41 that is thick outside and thin inside, and the inner wall of the connecting hole 41 is provided with a plurality of equally spaced tapered teeth 42. The cross-section of the tapered teeth 42 is triangular, and this structure is used to avoid the occurrence of idle stroke.

[0041] The tapered pneumatic safety chuck includes a driving chuck and a driven chuck. One end of the bearing seat 2 of the driving chuck away from the flange seat 1 is open. A connecting shaft 5 is slidably connected to the drive shaft 4. A connecting flange 6 is fixedly connected to the connecting shaft 5. The outer wall of the connecting flange 6 is arranged outside the bearing seat 2, and the outer wall of the connecting flange 6 is provided with meshing teeth 61. The drive shaft 4 and the connecting shaft 5 are connected by a spline 43. The synchronous rotation and axial relative displacement of the drive shaft 4 and the connecting shaft 5 are realized through the spline 43.

[0042] The connecting shaft 5 and the bearing seat 2 are also connected by a bearing to achieve relatively low-friction rotation.

[0043] The inner wall of the flange seat 1 is provided with a piston ring groove 13. The flange seat 1 is provided with a first air port 11 and a second air port 12 at positions corresponding to the piston ring groove 13. The first air port 11 and the second air port 12 are respectively located at different positions in the length direction of the flange seat 1. The sliding sleeve 3 is provided with an annular separating flange 32. The separating flange 32 divides the piston ring groove 13 into two chambers respectively connected to the first air port 11 and the second air port 12. The piston structure is realized by driving the sliding sleeve 3 and the corresponding structure that moves synchronously with the sliding sleeve 3 through the pressure difference between the chambers respectively connected by the first air port 11 and the second air port 12. Along the radial direction, the separating convex ring includes a separating convex ring outside 321 and a separating convex ring inside 322. The wall thickness of the separating convex ring outside 321 is smaller than that of the separating convex ring inside 321. This structure avoids the separating convex ring aligning with the second air port 12 and the first air port 11, resulting in too small an axial area and the pressure difference being unable to generate enough force to push the sliding sleeve 3 to move. The sliding sleeve 3 and the flange seat 1 are hermetically connected through a seal 33. The sealing performance of the piston structure is improved through the seal 33. The seal 33 is an O-ring in some embodiments.

[0044] A lifting ring 14 is fixedly connected to the flange base 1. This structure makes the device easy to handle.

[0045] In this application, the flange base 1 and the bearing block 2 are used to position the sliding sleeve 3 to form a piston, so as to realize the axial feed of the transmission shaft 4 connected to the sliding sleeve 3, thereby providing the functions of loosening and fixing the coiling shaft.

[0046] The connecting hole 41 is used for connecting and positioning the coiling shaft, and the tapered teeth 42 on the inner wall of the connecting hole 41 can achieve accurate positioning of the coiling shaft, avoiding the stroke difference caused by the gap between the tapered teeth 42 and the coiling shaft during rotation.

[0047] The connecting shaft 5 and the transmission shaft 4 can rotate synchronously and can also realize relative movement along the axis. The connecting flange 6 is a rotating body with a U-shaped cross section. A toothed ring is fixedly connected to the edge of the connecting flange 6 and is driven by meshing with the gear driven by the driving motor, thereby realizing the transmission of power. It has better precision than the belt drive method and meets the requirements of manufacturing similar battery diaphragms.

[0048] The above-described embodiments are only preferred solutions of the present invention and do not impose any form of limitation on the present invention. There are other variations and modifications without exceeding the technical solutions described in the claims.

Claims

1. A pneumatic chuck, characterized in that: include: Flange seat; The bearing seat is coaxially arranged with the flange seat and fixedly connected; The sliding sleeve is slidably mounted inside the flange seat and the bearing seat and forms a piston structure with the flange seat and the bearing seat, so as to be able to move relative to the flange seat and the bearing seat; A transmission shaft, which is fixedly connected to the sliding sleeve in the axial direction through a bearing and can rotate relatively; Among them, one end of the transmission shaft is provided with a connecting hole which is thick on the outside and thin on the inside, and the inner wall of the connecting hole has a number of bevel teeth distributed at equal intervals. The conical pneumatic safety chuck includes an active chuck and a driven chuck. The bearing seat of the active chuck is open at one end away from the flange seat. The transmission shaft is slidably connected with a connecting shaft, and the connecting shaft is fixedly connected with a connecting flange. The outer wall of the connecting flange is arranged outside the bearing seat, and the outer wall of the connecting flange is provided with meshing teeth.

2. A pneumatic chuck according to claim 1, characterized in that: A piston ring groove is provided on the inner wall of the flange seat, and a first air port and a second air port are provided on the flange seat at positions corresponding to the piston ring groove. The first air port and the second air port are respectively located at different positions in the length direction of the flange seat. An annular separation flange is provided on the sliding sleeve, and the separation flange divides the piston ring groove into two chambers respectively connected to the first air port and the second air port.

3. A pneumatic chuck according to claim 2, characterized in that: Along the radial direction, the separation protrusion ring includes an outer portion of the separation protrusion ring and an inner portion of the separation protrusion ring, and the wall thickness of the outer portion of the separation protrusion ring is smaller than that of the inner portion of the separation protrusion ring.

4. A pneumatic chuck according to claim 2, characterized in that: The sliding sleeve and the flange seat are sealed and connected via a sealing member.

5. A pneumatic chuck according to claim 1, characterized in that: The transmission shaft and the connecting shaft are connected by splines.

6. A pneumatic chuck according to claim 1, characterized in that: The cross section of the bevel gear is triangular.

7. A pneumatic chuck according to any one of claims 1 to 6, characterized in that: A lifting ring is fixedly connected to the flange seat.

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