CN221134111U - Clamping driving mechanism and heavy-duty air chuck - Google Patents

Abstract

The utility model discloses a clamping driving mechanism and a heavy-duty air chuck, which comprise a synchronizing ring, a pair of air cylinders symmetrically arranged on two sides of the synchronizing ring and a pair of sliding blocks radially sliding along the chuck, wherein arc racks are symmetrically arranged on the outer peripheral surface of the synchronizing ring, piston rods of the air cylinders are fixedly arranged, the cylinder body is slidably arranged on the chuck and provided with a first straight rack meshed with the arc racks, a second straight rack is arranged on the side edge of the sliding block, a gear transmission assembly is connected between the side edge of the sliding block and the synchronizing ring, and the two air cylinders are suitable for synchronizing through the synchronizing ring and driving the two sliding blocks to synchronously approach and separate through the two gear transmission assemblies. The clamping driving mechanism has smaller whole volume, saves the required installation space, reduces the outer diameter of the chuck, reduces the manufacturing cost and the moment of inertia, and improves the processing efficiency of the chuck.

Description

Clamping driving mechanism and heavy-duty air chuck

Technical Field

The utility model relates to the technical field of chucks, in particular to a clamping driving mechanism and a heavy-duty air chuck.

Background

The laser pipe cutting machine for heavy pipes is in great demand in industries such as building material pipelines, petroleum conveying pipelines, exhaust system ventilation pipes, large-scale engineering machinery and the like, so that a heavy pneumatic chuck matched with the laser pipe cutting machine needs to be designed. The traditional air chuck drives four sliding blocks to move along the radial direction of the chuck through four groups of fixedly installed air cylinders respectively, so that the clamping function is realized, and in order to ensure synchronous movement of the symmetrically arranged sliding blocks, a synchronous mechanism, such as the Chinese utility model with an authorized bulletin number of CN215356808U, is connected between the output ends of the two symmetrically arranged air cylinders.

Because the diameter of the pipe clamped by the heavy chuck is larger, the central aperture is obviously larger than that of an ordinary chuck, and meanwhile, larger clamping force is required, so that an air cylinder with a larger cylinder diameter is required to be equipped, and therefore, the installation space required by the chuck clamping driving mechanism with the existing structure is larger, so that the whole outer diameter of the chuck is larger, the manufacturing cost is high, the volume is large, the rotation inertia is larger, and the machining efficiency is reduced.

Disclosure of utility model

The utility model aims to provide a clamping driving mechanism and a heavy pneumatic chuck aiming at the defects of the prior art, wherein the whole volume of the clamping driving mechanism is smaller, and the required installation space is saved, so that the outer diameter of the chuck is reduced, the manufacturing cost and the rotational inertia are reduced, and the machining efficiency of the chuck is improved.

The technical scheme for realizing the purpose of the utility model is as follows:

The utility model provides a centre gripping actuating mechanism, includes the synchronizer ring, and the symmetry sets up a pair of cylinder and a pair of sliding block that radially slides along the chuck in the synchronizer ring both sides, the outer peripheral symmetry of synchronizer ring is equipped with the arc rack, the piston rod of cylinder is fixed to be set up, cylinder body slidable mounting on the chuck and be equipped with arc rack engaged with first straight rack, the side of sliding block is equipped with second straight rack and is connected with gear drive subassembly between the synchronizer ring, two the cylinder is suitable for being close to and keep away from in step and through two gear drive subassembly drive two sliding blocks synchronization through the synchronizer ring.

Further, the arc-shaped rack, the first straight rack and the second straight rack are respectively integrated with the synchronizing ring, the air cylinder and the sliding block.

Further, the gear transmission assembly comprises a rotating shaft, and a first middle wheel and a second middle wheel which are coaxially and fixedly arranged on the rotating shaft, and the first middle wheel and the second middle wheel are respectively meshed with the arc-shaped rack and the second straight rack.

Further, the chuck further comprises a linear guide rail fixedly arranged on the chuck, and a cylinder body of the cylinder is fixedly connected with a sliding block of the linear guide rail.

Further, the cylinder is a double-shaft double-acting cylinder.

The utility model provides a heavy air chuck, includes base, bearing, rotates the chuck body of installing on the base through the bearing and two sets of clamping driving mechanism as above that are crisscross distribution, the rear end of chuck body is coaxial to be equipped with driven ring gear and gas distribution subassembly, driven ring gear passes through the bearing and links to each other with the chuck body is fixed, the gas distribution subassembly is including coaxial normal running fit's sealed front shroud and sealed back shroud, fixedly connected with endotheca between the inner circle of sealed front shroud and the inner circle of chuck body, the coaxial normal running sleeve of synchronizer ring is established outside the endotheca, fixedly be equipped with jack catch on the sliding block and install at the chuck body front end, the rear end at the chuck body is installed in the cylinder body slidable mounting of cylinder, gear transmission subassembly rotates and installs between chuck body and sealed front shroud.

Further, a shell covered outside the driven gear ring is fixedly connected between the outer ring of the sealing rear cover plate and the base, a speed reducer is fixedly installed on the outer peripheral surface of the shell, and the output end of the speed reducer is fixedly connected with a driving gear meshed with the driven gear ring.

Further, the shell is fixedly connected with the base through the bearing, mounting holes are uniformly formed in the joint of the shell and the bearing along the circumferential direction, and fastening screws screwed on the shell are arranged in the mounting holes.

Further, the claw is split type structure, including claw arm and detachably install the stopper in claw arm one end both sides, two be equipped with the centre gripping gyro wheel between the stopper.

Further, the tip of centre gripping gyro wheel is equipped with annular groove and clearance and inserts in locating the stopper, the both sides of stopper are equipped with coaxial setting respectively and tip inserts first adjusting screw and the second adjusting screw in the annular groove.

By adopting the technical scheme, the utility model has the following beneficial effects:

(1) According to the clamping driving mechanism, the piston rod of the air cylinder is fixed, so that the movement of the cylinder body of the air cylinder is realized, the air cylinder body directly drives the synchronizing ring to rotate, and the synchronizing ring drives the sliding block to move through the gear transmission assembly, so that the traditional mode that the air cylinder body is fixed and the piston rod drives the synchronizing ring and the sliding block is changed, the structure of the clamping driving mechanism is simplified, the whole volume is reduced, the required installation space is saved, the outer diameter of the chuck is reduced, the manufacturing cost and the rotational inertia are reduced, and the machining efficiency of the chuck is improved.

(2) According to the utility model, the arc-shaped rack, the first straight rack and the second straight rack respectively form three integrated structures with the synchronizing ring, the cylinder body of the cylinder and the sliding block, so that the structure of the clamping driving mechanism is further simplified, the volume is reduced, the space is saved, meanwhile, the assembly step is omitted, and the assembly efficiency is improved.

(3) The gear transmission assembly drives the two intermediate wheels meshed with the synchronizing ring and the sliding block to synchronously rotate through the rotating shaft, so that the sliding block is moved, the structure is simple, and the transmission precision is high.

(4) According to the utility model, the cylinder body and the chuck body are in sliding connection through the linear guide rail, so that the structure is concise, the sliding is stable, the internal arrangement space is saved, and the whole thickness of the chuck is reduced.

(5) The utility model adopts the double-shaft double-acting cylinder to provide better guide for the movement of the cylinder body and improve the position precision of the cylinder body in the sliding process, thereby stably driving the synchronous ring to rotate.

(6) The heavy pneumatic chuck adopts the clamping driving mechanism with a more simplified structure, saves the internal arrangement space, ensures that the chuck has smaller outer diameter, and reduces the mass and the rotational inertia of the chuck.

(7) According to the utility model, the integral installation of the chuck is realized through the preassembled speed reducer, the problem of assembly precision is avoided, the service life of the chuck is shortened, the driven gear ring and the driving gear can be prevented from being exposed outside, and the chuck has excellent sealing dustproof performance.

(8) According to the utility model, the mounting holes are uniformly formed, and the shell and the bearing are connected through the screw, so that the shell can be mounted on the base in the circumferential direction in an adjustable manner, the circumferential position of the speed reducer can be changed, the problem of angle adjustment of the speed reducer is solved, the integral configuration requirements of different laser cutting machine types are met, and the chuck has better suitability.

(9) The claw of the utility model adopts a split structure, thereby reducing the processing difficulty and the manufacturing cost.

(10) According to the clamping roller, the mounting position of the clamping roller can be adjusted through the first adjusting screw and the second adjusting screw, fine adjustment of the clamping distance of the clamping jaw is achieved, and the clamping precision and stability are further improved.

Drawings

In order that the utility model may be more readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments that are illustrated in the appended drawings, in which:

FIG. 1 is a perspective view of the present utility model;

FIG. 2 is a schematic view of a clamping driving mechanism according to the present utility model;

FIG. 3 is a schematic view of the internal structure of the present utility model;

Fig. 4 is a schematic view of a partial structure of an end portion of a grip roller according to the present utility model.

The reference numerals in the drawings are:

The clamping chuck comprises a base 1, a chuck body 2, a clamping driving mechanism 3, a synchronizing ring 3-1, an arc-shaped rack 3-1-1, a cylinder 3-2, a first straight rack 3-2-1, a sliding block 3-3, a second straight rack 3-3-1, a rotating shaft 3-4, a first intermediate wheel 3-5, a second intermediate wheel 3-6, a driven gear ring 4, an air distribution assembly 5, a sealing front cover plate 5-1, a sealing rear cover plate 5-2, an inner sleeve 6, a clamping claw 7, clamping claw arms 7-1, limiting blocks 7-2, clamping rollers 7-3, an annular groove 7-3-1, a linear guide rail 8, a shell 9, a speed reducer 10, a first adjusting screw 11, a second adjusting screw 12 and a bearing 13.

Detailed Description

In order to better understand the above technical solutions, the following detailed description will refer to the accompanying drawings and specific embodiments.

Example 1

The heavy-duty air chuck as shown in fig. 1 to 4 comprises a base 1, a chuck body 2, a clamping driving mechanism 3, a driven gear ring 4, an air distribution assembly 5, an inner sleeve 6 and a claw 7, wherein a bearing 13 is connected between the chuck body 2 and the base 1, an outer ring of the bearing 13 is locked with an inner ring of the base 1, the chuck body 2 is fixedly connected with the inner ring of the bearing 13, the front end of the base 1 is rotatably mounted, the surface of the chuck body is flush with the base 1, the driven gear ring 4 is coaxially and fixedly mounted at the rear end of the inner ring of the bearing 13, the air distribution assembly 5 comprises a sealing front cover plate 5-1 and a sealing rear cover plate 5-2 which are coaxially and rotatably matched, the inner ring of the sealing front cover plate 5-1 is fixedly connected with the inner ring of the chuck body 2, the clamping driving mechanism 3 is provided with two groups and distributed in a cross manner, and each group of clamping driving mechanisms 3 comprises a synchronizing ring 3-1, two cylinders 3-2, two sliding blocks 3-3 and two groups of gear transmission assemblies. The synchronous ring 3-1 is coaxially and rotatably sleeved outside the inner sleeve 6, the two sliding blocks 3-3 are symmetrically arranged at the front end of the chuck body 2 and are arranged along the radial sliding of the chuck body 2, the two air cylinders 3-2 are respectively arranged corresponding to the two sliding blocks 3-3, the piston rods are fixedly arranged, the cylinder body is slidably arranged at the rear end of the chuck body 2 and synchronously moves through the synchronous ring 3-1, and the two gear transmission assemblies are respectively connected between the synchronous ring 3-1 and the two sliding blocks 3-3 to drive the sliding blocks 3-3 to move. The clamping jaws 7 are provided with four sliding blocks 3-3 which are respectively and fixedly arranged, so that the clamping function of the chuck is realized.

Specifically, four linear guide rails 8 are uniformly and fixedly installed at the rear end of the chuck body 2 along the circumferential direction, the cylinder bodies of the cylinders 3-2 are fixedly connected with the sliding blocks of the corresponding linear guide rails 8 respectively, the structure is concise, the sliding is stable, the internal arrangement space is saved, and the whole thickness of the chuck is thinned. The outer peripheral surface of the synchronizing ring 3-1 is symmetrically provided with an arc-shaped rack 3-1, the cylinder body of the cylinder 3-2 is provided with a first straight rack 3-2-1 meshed with the arc-shaped rack 3-1, when the cylinder 3-2 acts, the cylinder body moves back and forth, so that the synchronizing ring is driven to rotate, and as the cylinder bodies of the two cylinders are meshed with the synchronizing ring gear, the action synchronization of a pair of cylinders 3-2 is ensured. In order to enable the movement of the cylinder body to have better guiding, the cylinder 3-2 of the embodiment is a double-shaft double-acting cylinder, and the position accuracy of the cylinder body in the sliding process is improved, so that the synchronous ring is stably driven to rotate.

The side of the sliding block 3-3 is provided with a second straight rack 3-3-1, the gear transmission assembly comprises a rotating shaft 3-4 and a first intermediate wheel 3-5 and a second intermediate wheel 3-6 which are coaxially and fixedly arranged on the rotating shaft 3-4, and the first intermediate wheel 3-5 and the second intermediate wheel 3-6 are respectively meshed with the arc-shaped rack 3-1 and the second straight rack 3-3-1, so that a pair of sliding blocks 3-3 are driven to be far away from and close to each other. In order to further simplify the structure, the arc-shaped rack 3-1-1, the first straight rack 3-2-1 and the second straight rack 3-3-1 are respectively integrally formed with the synchronizing ring 3-1, the air cylinder 3-2 and the sliding block 3-3, the traditional air cylinder body is changed to be fixed, the piston rod drives the synchronizing ring and the sliding block, the structure of the clamping driving mechanism is simplified, the whole volume is reduced, the required installation space is saved, the outer diameter of the chuck is reduced, the manufacturing cost and the rotational inertia are reduced, and the machining efficiency of the chuck is improved.

A shell 9 covered outside the driven gear ring 4 is fixedly connected between the outer ring of the sealing rear cover plate 5-2 and the base 1, a speed reducer 10 is fixedly arranged on the outer peripheral surface of the shell 9, and the output end of the speed reducer 10 is fixedly connected with a driving gear meshed with the driven gear ring 4. Through preassembling speed reducer 10, realize the integral installation of chuck, avoid the assembly precision problem to lead to chuck life to shorten, can avoid driven ring gear 4 and driving gear to expose in the outside simultaneously, have excellent sealed dustproof performance. The shell 9 is fixedly arranged at the rear end of the outer ring of the bearing 13, mounting holes are uniformly formed in the joint of the bearing 13 and the shell 9 along the circumferential direction, and fastening screws screwed on the shell 9 are arranged in the mounting holes. Therefore, the shell 9 is mounted on the bearing 13 in a circumferential adjustable manner, the circumferential position of the speed reducer 10 can be changed, the problem of angle adjustment of the speed reducer 10 is solved, the integral configuration requirements of different laser cutter types are met, and the chuck has better suitability.

In order to reduce manufacturing cost and processing difficulty, the claw 7 of the embodiment is of a split structure and comprises claw arms 7-1 and limiting blocks 7-2 detachably mounted at two ends of one side of the claw arms 7-1, which is close to the center of the chuck, and clamping rollers 7-3 are arranged between the two limiting blocks 7-2. The end part of the clamping roller 7-3 is provided with an annular groove 7-3-1 and is inserted into the limiting block 7-2 in a clearance way, and two sides of the limiting block 7-2 are respectively provided with a first adjusting screw 11 and a second adjusting screw 12 which are coaxially arranged and the end part of which is inserted into the annular groove 7-3-1. The mounting position of the clamping roller 7-3 can be adjusted by rotating the first adjusting screw and the second adjusting screw, so that the fine adjustment of the clamping distance of the clamping jaw is realized, and the clamping precision and stability are further improved.

The embodiment adopts an integrated chuck structure, the chuck is provided with a speed reducer 10, a driving gear and a driven gear ring 4, and two gears are meshed in a closed space of the chuck, so that transmission, sealing, dust prevention and lubrication are realized. The chuck adopts four cylinder drive gear structure, and every pair of cylinder drives upper and lower duplex intermediate gear promotes the sliding block through self first rack and arc rack transmission, guarantees the centre gripping synchronism of a pair of jack catch, improves the centre gripping precision of preceding chuck. The mode that the traditional cylinder body is fixed, and the piston rod drives the synchronizing ring and the sliding block is changed, so that the structure of the clamping driving mechanism is simplified, the whole size is reduced, the required installation space is saved, the outer diameter of the chuck is reduced, the manufacturing cost and the rotational inertia are reduced, and the machining efficiency of the chuck is improved.

While the foregoing is directed to embodiments of the present utility model, other and further details of the utility model may be had by the present utility model, it should be understood that the foregoing description is merely illustrative of the present utility model and that no limitations are intended to the scope of the utility model, except insofar as modifications, equivalents, improvements or modifications are within the spirit and principles of the utility model.

Claims (10)

1. A clamping drive mechanism, characterized in that: the device comprises a synchronizing ring (3-1), a pair of air cylinders (3-2) symmetrically arranged on two sides of the synchronizing ring (3-1) and a pair of sliding blocks (3-3) radially arranged along a chuck in a sliding mode, wherein arc racks (3-1-1) are symmetrically arranged on the outer peripheral surface of the synchronizing ring (3-1), piston rods of the air cylinders (3-2) are fixedly arranged, the air cylinders are slidably arranged on the chuck and are provided with first straight racks (3-2-1) meshed with the arc racks (3-1), the side edges of the sliding blocks (3-3) are provided with second straight racks (3-3-1) and are connected with the synchronizing ring (3-1) through gear transmission assemblies, and the two air cylinders (3-2) are suitable for keeping motion synchronization through the synchronizing ring (3-1) and driving the two sliding blocks (3-3) to be synchronously close to and far away from each other through the two gear transmission assemblies.

2. A clamping drive mechanism as claimed in claim 1, wherein: the arc-shaped rack (3-1-1), the first straight rack (3-2-1) and the second straight rack (3-3-1) are respectively integrally formed with the synchronizing ring (3-1), the air cylinder (3-2) and the sliding block (3-3).

3. A clamping drive mechanism as claimed in claim 1, wherein: the gear transmission assembly comprises a rotating shaft (3-4), and a first middle wheel (3-5) and a second middle wheel (3-6) which are coaxially and fixedly arranged on the rotating shaft (3-4), wherein the first middle wheel (3-5) and the second middle wheel (3-6) are respectively meshed with the arc-shaped rack (3-1-1) and the second straight rack (3-3-1).

4. A clamping drive mechanism as claimed in claim 1, wherein: the chuck is characterized by further comprising a linear guide rail (8) fixedly arranged on the chuck, and a cylinder body of the cylinder (3-2) is fixedly connected with a sliding block of the linear guide rail (8).

5. A clamping drive mechanism as claimed in claim 1, wherein: the cylinder (3-2) is a double-shaft double-acting cylinder.

6. A heavy duty air chuck, characterized by: the clamping driving mechanism comprises a base (1), a bearing (13), a chuck body (2) rotatably mounted on the base (1) through the bearing (13) and two groups of clamping driving mechanisms (3) which are distributed in a crisscross mode, wherein a driven gear ring (4) and an air distribution assembly (5) are coaxially arranged at the rear end of the chuck body (2), the driven gear ring (4) is fixedly connected with the chuck body (2) through the bearing (13), the air distribution assembly (5) comprises a sealing front cover plate (5-1) and a sealing rear cover plate (5-2) which are coaxially and rotatably matched, an inner sleeve (6) is fixedly connected between the inner ring of the sealing front cover plate (5-1) and the inner ring of the chuck body (2), the synchronous ring (3-1) is coaxially and rotatably sleeved outside the inner sleeve (6), a claw (7) is fixedly arranged on the sliding block (3-3) and is mounted at the front end of the chuck body (2), and a cylinder body of the cylinder (3-2) is slidably mounted at the rear end of the chuck body (2).

7. A heavy duty air chuck as set forth in claim 6 wherein: a shell (9) covered outside the driven gear ring (4) is fixedly connected between the outer ring of the sealing rear cover plate (5-2) and the base (1), a speed reducer (10) is fixedly installed on the outer peripheral surface of the shell (9), and a driving gear meshed with the driven gear ring (4) is fixedly connected to the output end of the speed reducer (10).

8. A heavy duty air chuck as set forth in claim 7 wherein: the shell (9) is fixedly connected with the base through the bearing (13), mounting holes are uniformly formed in the joint of the shell and the bearing (13) along the circumferential direction, and fastening screws screwed on the shell (9) are arranged in the mounting holes.

9. A heavy duty air chuck as set forth in claim 6 wherein: the clamping jaw (7) is of a split structure and comprises clamping jaw arms (7-1) and limiting blocks (7-2) detachably mounted on two sides of one end of each clamping jaw arm (7-1), and clamping rollers (7-3) are arranged between the two limiting blocks (7-2).

10. A heavy duty air chuck as set forth in claim 9 wherein: the end part of the clamping roller (7-3) is provided with an annular groove and is inserted into the limiting block (7-2) in a clearance way, and two sides of the limiting block (7-2) are respectively provided with a first adjusting screw (11) and a second adjusting screw (12) which are coaxially arranged and the end part of which is inserted into the annular groove.