CN220362001U - Support chuck - Google Patents

Abstract

The utility model provides a support chuck, which relates to the field of support chucks, and adopts the following scheme: including clamping the dish, movably be provided with a plurality of clamping components on the clamping the dish, two at least clamping components set up relatively, and a plurality of clamping components are connected with one-way drive assembly respectively, one-way drive assembly is connected with drive assembly, and two of relative setting drive assembly is used for pressing from both sides tightly and unclamping respectively, and two of relative setting one-way drive assembly shares an intermediate drive spare, two of relative setting one-way drive assembly's transmission opposite direction. The utility model adopts the smaller driving component to realize the clamping of the workpiece with larger size, does not need to increase the size of the chuck, and does not influence the dynamic performance of the chuck.

Description

Support chuck

Technical Field

The utility model relates to the field of support chucks, in particular to a support chuck.

Background

The laser cutting is the most important application technology in the laser processing industry, and because the chuck is a main component of a pipe laser cutting machine because of the characteristics of high speed, high precision, no deformation of a workpiece and the like, the chuck used by the existing laser equipment comprises an electric chuck, the workpiece can be positioned and controlled by clamping the workpiece by using a servo motor, but the self-adaptive control of the clamping force is more complex, particularly the power supply of the servo motor needs to be in a contact mode, the long-term running abrasion is very large, the stability is poor, and the high configuration needs to be adopted for improving the stability, so that the cost is too high and the cost performance is poor, and the electric chuck is commonly used for high-end users and special occasions.

The pneumatic chuck has the characteristics of simple structure and higher cost performance, high-pressure gas is input to clamp the workpiece when the chuck is static, the gas source is stopped to maintain the pressure of the gas in the chuck when the chuck rotates, the workpiece is kept in a clamping state, and the pneumatic chuck has the greatest advantages that the gas has compressibility and self-adaptability to limited errors of the workpiece, and can keep a certain clamping force while avoiding clamping the workpiece.

However, the cylinder cannot be stopped at any position in the stroke range, so that the pneumatic chuck only has two states of clamping and loosening, and when a workpiece with a larger size is clamped, the stroke of the cylinder must be correspondingly increased, which causes the chuck to be larger and larger in size and poor in dynamic performance.

Disclosure of Invention

In order to solve the problem that the dynamic performance is poor when the pneumatic chuck clamps a workpiece with a larger size in the prior art, the utility model provides a supporting chuck, which adopts a smaller driving assembly to clamp the workpiece with the larger size, does not need to increase the size of the chuck, and does not influence the dynamic performance of the chuck.

The technical scheme adopted by the utility model for solving the technical problems is as follows: the utility model provides a support chuck, includes the clamping disk, movably is provided with a plurality of clamping components on the clamping disk, and two at least clamping components set up relatively, and is a plurality of clamping components is connected with one-way drive assembly, one-way drive assembly is connected with drive assembly, and two of relative setting drive assembly is used for pressing from both sides tightly and unclamping respectively, and two of relative setting one-way drive assembly shares an intermediate drive spare, two of relative setting one-way drive assembly's transmission opposite direction. The driving assembly can reciprocate through the unidirectional transmission assembly, the echelon driving clamping assembly moves, a larger clamping size range is realized, impact on a workpiece tool when a large-stroke driving piece clamps a small-size workpiece can be avoided, and clamping of a notch or a groove workpiece can be realized.

Further, the drive assembly comprises a drive rack, the unidirectional transmission assembly comprises a first transmission gear, the first transmission gear is meshed with the drive rack, the first transmission gear is sleeved on a transmission shaft, the first transmission gear rotates unidirectionally, the transmission directions of the two first transmission gears on the opposite sides are opposite, a second transmission gear is arranged on the transmission shaft, the second transmission gear is meshed with the transmission rack, the transmission rack is movably arranged on the clamping disc, the transmission rack is connected with the clamping assembly, and the movement directions of the two transmission racks on the opposite sides are opposite. The one-way transmission is realized through the gear, the opposite movement of the clamping assembly is realized through the transmission racks arranged on two opposite sides, the structure is simple and reliable, the failure rate is lower, and the precision is higher.

Further, the first transmission gear is rotatably arranged on the transmission shaft through a one-way bearing, and the two opposite one-way bearings are opposite in rotation direction.

Furthermore, the inner ring of the first transmission gear is provided with a ratchet, the ratchet inclination directions of the two opposite sides of the first transmission gear are opposite, the corresponding position of the transmission shaft is provided with a pawl, and a reset spring is further arranged between the pawl and the transmission shaft.

Further, the intermediate transmission piece adopts an intermediate gear, the unidirectional transmission assembly further comprises a transmission gear III, the transmission gear III is arranged on the transmission shaft, the two transmission gears III on the opposite sides are meshed with the same intermediate gear, and tooth surfaces of the two transmission racks on the opposite sides are oppositely arranged. The opposite side transmission is carried out through the intermediate gear, so that the occupied space is small and the precision is high.

Further, the intermediate gear is rotatably arranged on an intermediate shaft, the intermediate shaft is arranged on a support base, and the support base is connected with the clamping disc through a support sleeve.

Further, the clamping assembly comprises a roller and a bracket, wherein the roller is rotatably arranged on the bracket, and the bracket is connected with the corresponding transmission rack.

Further, the transmission racks are arranged on corresponding sliding blocks, the sliding blocks are movably arranged in sliding grooves of the clamping discs, wedge-shaped teeth are arranged on the surfaces of the sliding blocks corresponding to the supports, T-shaped grooves are further formed in the sliding blocks, and locking bolts are movably arranged in the T-shaped grooves. The support and the sliding block are connected through wedge teeth, so that the connection rigidity is good, the adjustment precision is high, the clamping range of the chuck is further enlarged, and the diversified clamping of special-shaped workpieces can be realized.

Further, both ends of the transmission shaft are rotatably arranged on the clamping disc and the support base.

Further, the driving assembly comprises a driving air cylinder, and a piston rod of the driving air cylinder is provided with the driving rack. The driving cylinder is adopted to provide power to have self-adaptability to limited errors of the workpiece, so that the workpiece is prevented from being damaged by clamping, and a certain clamping force can be maintained.

From the above technical scheme, the utility model has the following advantages:

the utility model provides a support chuck, which can realize the reciprocating movement of a driving assembly through a unidirectional transmission assembly, drive a clamping assembly to move in a echelon manner, realize a larger clamping size range, avoid the impact on a workpiece when a large-stroke driving piece clamps a small-size workpiece, and realize the clamping of a notch or groove workpiece; the unidirectional transmission is realized through the gears, the opposite clamping assembly reverse movement is realized through the two transmission racks arranged on opposite sides, the structure is simple and reliable, the failure rate is low, and the precision is high; the opposite side transmission is carried out through the intermediate gear, so that the occupied space is small, and the precision is high; the bracket and the sliding block are connected by adopting wedge teeth, so that the connection rigidity is good, the adjustment is accurate, the clamping range of the chuck is further enlarged, and the diversified clamping of the special-shaped workpiece can be realized; the driving cylinder is adopted to provide power to have self-adaptability to limited errors of the workpiece, so that the workpiece is prevented from being damaged by clamping, and a certain clamping force can be maintained.

Drawings

In order to more clearly illustrate the technical solutions of the present utility model, the drawings that are needed in the description will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a specific embodiment of the present utility model.

Fig. 2 is a schematic diagram of an assembly structure of a unidirectional transmission assembly, a driving assembly and an intermediate transmission member according to an embodiment of the present utility model.

Fig. 3 is a cross-sectional view A-A of fig. 2.

Fig. 4 is a schematic diagram of an assembly structure of a unidirectional transmission assembly and an intermediate transmission member according to an embodiment of the present utility model.

Fig. 5 is a schematic diagram of an assembly structure of a unidirectional transmission assembly and a clamping assembly according to an embodiment of the present utility model.

In the figure, 1, clamping a disc; 2. a support sleeve; 3. a support base; 4. a one-way bearing; 5. a transmission shaft; 6. a first transmission gear; 7. a bearing; 8. an intermediate gear; 9. a driving cylinder; 10. a slide block; 11. a drive rack; 12. a transmission gear II; 13. a transmission gear III; 14. an intermediate shaft; 15. a roller; 16. and (3) a bracket.

Detailed Description

In order to make the objects, features and advantages of the present utility model more obvious and understandable, the technical solutions of the present utility model will be clearly and completely described below with reference to the drawings in this specific embodiment, and it is apparent that the embodiments described below are only some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, based on the embodiments in this patent, which would be within the purview of one of ordinary skill in the art without the particular effort to make the utility model are intended to be within the scope of the patent protection.

The inventor finds that in the existing support chuck, when a workpiece with larger size is clamped, the stroke of the air cylinder must be correspondingly increased, so that the size of the chuck is larger and larger, and the dynamic performance is poor; based on the above, in an embodiment of the present utility model provided by the present inventors, by adopting the technical concepts of unidirectional transmission and echelon driving, the problem that the small-stroke driving member is difficult to clamp the workpiece with a larger size in the prior art is solved, and further the problem that the dynamic performance is poor when the supporting chuck clamps the workpiece with a larger size is solved.

As shown in fig. 1 to 2, the present embodiment provides a support chuck including a clamping plate 1, a clamping assembly, a support base 3, and a support sleeve 2; the clamping disc 1 and the supporting base 3 are connected with the supporting sleeve 2 to form a closed cavity, a plurality of clamping assemblies are movably arranged on the clamping disc 1, at least two clamping assemblies are oppositely arranged, in the specific embodiment, the clamping assemblies are provided with 4 groups and are opposite to each other, the clamping assemblies are respectively connected with one-way transmission assemblies, the one-way transmission assemblies are connected with driving assemblies, the two driving assemblies which are oppositely arranged are respectively used for clamping and loosening, the two driving assemblies on opposite sides alternately work, the two one-way transmission assemblies which are oppositely arranged share one middle transmission piece, and the transmission directions of the two one-way transmission assemblies on opposite sides are opposite; the one-way driving assembly can drive the assembly to unidirectionally drive the clamping assembly, so that the clamping assembly cannot be moved when the driving assembly resets, the clamping assembly is driven to move in a echelon manner by the driving assembly, the large clamping size range of the chuck is realized, the impact on a workpiece tool when a large-stroke driving piece such as a cylinder clamps a small-size workpiece can be avoided, and the clamping on a notch or a groove workpiece can be realized.

As shown in fig. 2 and 4, in order to realize reliable and high-precision clamping, the driving assembly comprises a driving rack, the unidirectional transmission assembly comprises a first transmission gear 6, the first transmission gear 6 is meshed with the driving rack, the first transmission gear 6 is sleeved on a transmission shaft 5, the first transmission gear 6 rotates unidirectionally, the transmission directions of the two opposite transmission gears 6 are opposite, bearings 7 are arranged at two ends of the transmission shaft 5 and rotatably arranged on the clamping disc 1 and the supporting base 3, the transmission shaft 5 is connected with a second transmission gear 12 through keys, the second transmission gear 12 is meshed with a transmission rack 11, the transmission rack 11 is movably arranged on the clamping disc 1, the moving direction of the transmission rack 11 is perpendicular to the moving direction of the driving rack, the transmission rack 11 is connected with a clamping assembly, unidirectional transmission is realized through gears, and opposite clamping assembly reverse movement is realized through the transmission racks 11 arranged on two opposite sides, the structure is simple and reliable, the failure rate is low, and the precision is high.

As shown in fig. 2 and 3, in order to realize unidirectional transmission of the first transmission gear 6, the inner ring of the first transmission gear 6 is provided with ratchets, the ratchets of the two opposite transmission gears 6 incline in opposite directions, a pawl is arranged at the corresponding position of the transmission shaft 5, and a return spring is arranged between the pawl and the transmission shaft 5; the first transmission gear 6 can also be rotatably arranged on the transmission shaft 5 through the one-way bearing 4, and the rotation directions of the two opposite one-way bearings 4 are opposite; in this embodiment, the unidirectional bearing 4 is adopted to perform unidirectional transmission, so that the structure is simple, parts are fewer, the unidirectional bearing 4 is a product which can be purchased in the market, and the structure is not repeated.

As shown in fig. 4, the intermediate transmission member may adopt a sprocket chain form to realize synchronous transmission of the opposite-side unidirectional transmission assembly, in this embodiment, in order to reduce the chuck volume and improve the precision, the intermediate transmission member adopts an intermediate gear 8, the intermediate gear 8 is rotatably disposed on an intermediate shaft 14, in this embodiment, four clamping assemblies are disposed at different orientations of the clamping disk 1, two transmission gears three 13 connected with the opposite-side two clamping assemblies are meshed with the same intermediate gear 8, the two intermediate gears 8 are adjacently disposed, the intermediate shaft 14 is disposed on the support base 3, the intermediate shaft 14 and the support base 3 are in an integral structure, and the intermediate shaft 14 is of a hollow structure, so as to realize light weight, the unidirectional transmission assembly further comprises transmission gears three 13, the transmission gears three 13 are disposed on the transmission shaft 5 through keys, the opposite-side two transmission gears three 13 are meshed with the same intermediate gear 8, tooth surfaces of the opposite-side two transmission racks 11 are disposed oppositely, and reverse movement of the opposite-side two transmission racks 11 can be realized.

As shown in fig. 4 and 5, in order to be able to clamp a special-shaped workpiece, the clamping assembly comprises a roller 15 and a bracket 16, the roller 15 is rotatably arranged on the bracket 16, the non-opposite roller 15 is no longer in the same plane, the bracket 16 is connected with a corresponding transmission rack 11, the transmission rack 11 is arranged on a corresponding sliding block 10, in this embodiment, the transmission rack 11 and the sliding block 10 are of an integrated structure, the sliding block 10 is movably arranged in a sliding groove of the clamping disk 1, wedge-shaped teeth are arranged on the surfaces of the sliding block 10 corresponding to the bracket 16, a T-shaped groove is also arranged on the sliding block 10, a locking bolt is movably arranged in the T-shaped groove, a mounting hole is arranged at a corresponding position of the bracket 16, and the locking bolt can extend out of the mounting hole and fix the bracket 16 on the sliding block 10 through the locking bolt; the bracket 16 and the sliding block 10 are connected through the wedge-shaped teeth, so that the connection rigidity is good, and an operator can guarantee to accurately adjust the position of the bracket 16 through observing the wedge-shaped teeth so as to adapt to workpieces with different sizes, and can also realize diversified clamping of special-shaped workpieces.

As shown in fig. 1 to 3, the driving assembly may use a form of a servo motor and a screw, a screw seat is provided on the screw, a driving rack is provided on the screw seat, the driving assembly includes a driving cylinder 9 for making the chuck have adaptability to limited errors of a workpiece, the driving cylinder 9 is provided on a supporting base 3, a driving rack is provided on a piston rod of the driving cylinder 9, and the driving cylinder 9 can maintain a certain clamping force while avoiding clamping the workpiece by utilizing the characteristic of a certain compressibility of air.

The working process of the support chuck is as follows:

when a workpiece is clamped, piston rods of two driving cylinders 9 which are not oppositely arranged extend, a first driving gear 6 rotates under the action of a driving rack and drives a transmission shaft 5 to rotate at the same time, the transmission shaft 5 drives a second driving gear 12 and a third driving gear 13 to drive respectively, the third driving gear 13 drives a third driving gear 13 on the opposite side to rotate through an intermediate gear 8 so as to drive the transmission shaft 5 on the opposite side to rotate, the first driving gear 6 on the opposite side does not rotate, the transmission shaft 5 drives a second driving gear 12 on the opposite side to rotate, the two driving gears 12 drive corresponding driving racks 11 to move reversely, two supports 16 on the opposite side move oppositely to clamp, when the driving cylinders 9 reach the upper limit of travel, the piston rods retract, the first driving gear 6 idles and does not drive at the moment, and when the piston rods extend again, the processes are repeated until the workpiece is clamped; when the workpiece is loosened, the piston rods of the other two driving cylinders 9 which are not oppositely arranged extend, the corresponding first transmission gear 6 rotates, the corresponding transmission shaft 5, the second transmission gear 12, the third transmission gear 13 and the middle wheel rotate reversely, the first transmission gear 6 on the opposite side does not rotate, and finally the roller 15 moves reversely to realize the loosening.

From the above detailed description, it can be seen that the present utility model has the following advantages:

1. the unidirectional transmission assembly can realize the reciprocating movement of the driving assembly, the echelon driving of the clamping assembly to move, the larger clamping size range is realized, the impact on the workpiece when the large-stroke driving piece clamps the small-size workpiece can be avoided, and the clamping on the notch or bevel workpiece can be realized;

2. the unidirectional transmission is realized through the gears, and the opposite movement of the clamping assembly is realized through the two transmission racks 11 arranged on opposite sides, so that the structure is simple and reliable, the failure rate is low, and the precision is high;

3. the opposite side transmission is carried out through the intermediate gear 8, so that the space occupation is small, and the precision is high;

4. the bracket 16 and the sliding block 10 are connected by adopting wedge teeth, so that the connection rigidity is good, the adjustment precision is high, the clamping range of the chuck is further enlarged, and the diversified clamping of special-shaped workpieces can be realized;

5. the driving cylinder 9 is adopted to provide power, so that the self-adaption type workpiece clamping device has self-adaption to limited errors of workpieces, and can maintain certain clamping force while avoiding clamping the workpieces.

The terms "upper," "lower," "outboard," "inboard," and the like in the description and in the claims of the utility model and in the above figures, if any, are used for distinguishing between relative relationships in position and not necessarily for giving qualitative sense. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the utility model described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. The utility model provides a support chuck, includes clamping disk (1), is provided with a plurality of clamping components on clamping disk (1) movably, and its characterized in that, two at least clamping components set up relatively, and a plurality of clamping components are connected with one-way drive assembly respectively, and one-way drive assembly is connected with drive assembly, and two drive assemblies of relative setting are used for pressing from both sides tightly and unclamping respectively, and two one-way drive assemblies of relative setting share an intermediate drive spare, and the transmission direction of two one-way drive assemblies of relative setting is opposite.

2. The support chuck according to claim 1, wherein the drive assembly comprises a drive rack, the unidirectional transmission assembly comprises a first transmission gear (6), the first transmission gear (6) is sleeved on the transmission shaft (5), the first transmission gear (6) is meshed with the drive rack, the first transmission gear (6) rotates unidirectionally, the transmission directions of the two opposite first transmission gears (6) are opposite, a second transmission gear (12) is arranged on the transmission shaft (5), the second transmission gear (12) is meshed with the transmission rack (11), the transmission rack (11) is movably arranged on the clamping disk (1), the transmission rack (11) is connected with the clamping assembly, and the movement directions of the two opposite transmission racks (11) are opposite.

3. Support chuck according to claim 2, characterized in that the first transmission gear (6) is rotatably arranged on the transmission shaft (5) by means of one-way bearings (4), the opposite rotation directions of the two one-way bearings (4) being opposite.

4. The support chuck according to claim 2, characterized in that the inner ring of the first transmission gear (6) is provided with ratchet teeth, the ratchet teeth of the two opposite transmission gears (6) are inclined in opposite directions, a pawl is provided at the corresponding position of the transmission shaft (5), and a return spring is provided between the pawl and the transmission shaft (5).

5. The support chuck according to any one of claims 2 to 4, characterized in that the intermediate transmission member employs an intermediate gear (8), the unidirectional transmission assembly further comprises a third transmission gear (13), the third transmission gear (13) being arranged on the transmission shaft (5), both of the third transmission gears (13) on opposite sides being engaged with the same intermediate gear (8), the tooth flanks of the two transmission racks (11) on opposite sides being arranged opposite each other.

6. Support chuck according to claim 5, characterized in that the intermediate gear (8) is rotatably arranged on an intermediate shaft (14), the intermediate shaft (14) being arranged on the support base (3), the support base (3) being connected to the clamping disk (1) by means of a support sleeve (2).

7. The support chuck according to claim 2, characterized in that the clamping assembly comprises a roller (15) and a bracket (16), the roller (15) being rotatably arranged on the bracket (16), the bracket (16) being connected to the respective driving rack (11).

8. The support chuck according to claim 7, characterized in that the driving racks (11) are arranged on the respective slide blocks (10), the slide blocks (10) are movably arranged in the slide grooves of the clamping disk (1), wedge-shaped teeth are arranged on the surfaces of the slide blocks (10) corresponding to the brackets (16), T-shaped grooves are also arranged on the slide blocks (10), and locking bolts are movably arranged in the T-shaped grooves.

9. Support chuck according to claim 6, characterized in that both ends of the drive shaft (5) are rotatably arranged on the clamping disk (1) and the support base (3).

10. Support chuck according to claim 2, characterized in that the drive assembly comprises a drive cylinder (9), the piston rod of the drive cylinder (9) being provided with a drive rack.