CN221185156U - Four-jaw chuck - Google Patents
Four-jaw chuck Download PDFInfo
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- CN221185156U CN221185156U CN202322721799.0U CN202322721799U CN221185156U CN 221185156 U CN221185156 U CN 221185156U CN 202322721799 U CN202322721799 U CN 202322721799U CN 221185156 U CN221185156 U CN 221185156U
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- 230000001360 synchronised effect Effects 0.000 claims abstract description 36
- 230000005540 biological transmission Effects 0.000 claims abstract description 6
- 210000000056 organ Anatomy 0.000 claims description 8
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 230000007774 longterm Effects 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 6
- 239000000428 dust Substances 0.000 description 12
- 238000005299 abrasion Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 1
- 238000003698 laser cutting Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
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Abstract
The utility model provides a four-jaw chuck, which comprises a frame, a rotary driving mechanism arranged on the frame, a rear cover rotatably arranged on the frame and in transmission connection with the rotary driving mechanism, a front cover fixedly connected with the rear cover and provided with a central hole and two sliding grooves respectively arranged in the vertical direction and the horizontal direction, four air cylinders respectively provided with a cylinder body and a piston rod, wherein the front end surface of the cylinder body of each air cylinder is fixedly provided with a clamping jaw, the four air cylinders are respectively and movably arranged in one sliding groove of the front cover by the cylinder body of each air cylinder, the outer end of the piston rod of each air cylinder is fixedly connected with the front cover, and the rear end of the cylinder body of each air cylinder is fixedly connected with a synchronous mechanism which is used for realizing synchronous movement of the clamping jaw and has an automatic tensioning and adjusting function; the synchronous mechanism comprises two horizontal pull plates, two vertical pull plates, four sets of fixed pulley blocks, four sets of tensioning pulley blocks and four flexible connecting pieces. The utility model can ensure the synchronous precision of the chuck in the long-term operation process and has better dustproof performance.
Description
Technical Field
The utility model relates to the technical field of chucks, in particular to a four-jaw chuck.
Background
The four-jaw chuck is a necessary auxiliary tool for clamping a workpiece to be machined on a laser cutting production line, and is generally composed of a front cover, a rear cover, a pair of transverse clamping jaws and a pair of longitudinal clamping jaws (also called clamping jaws) movably arranged on the front cover, a power source (an air cylinder or a motor, which is commonly used for driving the two pairs of clamping jaws to move, a transmission mechanism arranged between the power source and the two pairs of clamping jaws, a synchronous mechanism for realizing synchronous movement of the two pairs of clamping jaws respectively, a frame serving as an installation base, a rotary driving mechanism arranged on the frame and used for driving the chuck main body to rotate so that the two pairs of clamping jaws can clamp the workpiece to be machined to rotate together during working, and the like. The synchronous mechanism of the chuck is commonly provided with lever type, chain wheel type, gear rack type and other structures, wherein the chain sprocket is used as a main body to form the synchronous mechanism, such as the chuck disclosed in Chinese patent documents with the authorized publication numbers of CN214769807U and CN219254175U, the existing synchronous mechanism which is used as the main body is commonly provided with the chuck, and the working precision of the synchronous mechanism is influenced due to the fact that the chain sprocket can be worn to generate gaps in the long-term operation process of the chuck, so that the synchronous precision of the movement of the clamping jaw is influenced, and even the situation that the chain and the sprocket are loosened can cause the chuck to work abnormally in severe cases. It is therefore imperative for those skilled in the art to solve the aforementioned technical problems.
Disclosure of utility model
The purpose of the utility model is that: in order to solve the technical problems of the chain sprocket type synchronous mechanism in the prior art, the four-jaw chuck with improved structure is provided.
The technical scheme of the utility model is as follows: the utility model relates to a four-jaw chuck, which comprises a frame, a rotary driving mechanism arranged on the frame, a rear cover which is in transmission connection with the rotary driving mechanism and is rotatably arranged on the frame, a front cover which is fixedly connected with the rear cover and is provided with a central hole and two sliding grooves respectively in the up-down direction and the left-right direction, four air cylinders respectively provided with a cylinder body and a piston rod, wherein a clamping jaw is fixedly arranged on the front end surface of the cylinder body of each air cylinder, one air cylinder body of each air cylinder is movably arranged in one sliding groove of the front cover, and the outer end of the piston rod of each air cylinder is fixedly connected with the front cover, and the four-jaw chuck is structurally characterized in that: the clamping jaw clamping device also comprises a synchronous mechanism which is fixedly connected with the rear ends of the cylinder bodies of the four cylinders and is used for realizing synchronous movement of the clamping jaw and has an automatic tensioning and adjusting function.
The further scheme is as follows: the synchronous mechanism comprises two horizontal pull plates, two vertical pull plates, four sets of fixed pulley blocks, four sets of tensioning pulley blocks and four flexible connecting pieces; the two horizontal pull plates and the two vertical pull plates are fixedly connected with the rear end of the cylinder body of one cylinder respectively; the four fixed pulley blocks are respectively fixedly arranged on the left side and the right side of an upward chute and a downward chute of the front cover and the upper side and the lower side of the leftward chute; the four tensioning pulley blocks are fixedly arranged on the left side and the right side of the other upward and downward chute of the front cover and the upper side and the lower side of the other leftward and rightward chute respectively; four flexible connecting pieces are arranged in a closed loop manner between a set of fixed pulley blocks and a tensioning pulley block which are oppositely arranged.
The further scheme is as follows: the fixed pulley blocks comprise fixing frames and pulleys rotatably arranged in the fixing frames, and each fixed pulley block is fixedly connected with the rear end face of the front cover through the fixing frames.
The further scheme is as follows: the tensioning pulley block comprises a base fixedly connected with the front cover, a sliding frame movably arranged on the base, a second pulley rotatably arranged in the sliding frame, two connecting rods movably arranged on the base, one end of each connecting rod is fixedly connected with the sliding frame, the other end of each connecting rod extends out of the base, an elastic element is sleeved on the extending end of each connecting rod, and a locking nut is arranged at the outer end of each connecting rod; two ends of each elastic element are respectively elastically abutted with the base and the lock nut; each flexible connecting piece is in fit and wound connection with a pulley of a corresponding set of fixed pulley blocks and a second pulley of the tensioning pulley block.
The further scheme is as follows: the elastic element is a spring.
The further scheme is as follows: the flexible connecting piece is a chain, a synchronous belt or a steel wire rope; correspondingly, the pulley and the second pulley are sprockets, or synchronous wheels, or smooth wheels.
The further scheme is as follows: each cylinder is provided with a piston rod fixing plate; the outer ends of the piston rods of each cylinder are fixedly connected with the corresponding piston rod fixing plate.
The further scheme is as follows: the four-jaw chuck further comprises a dustproof assembly, wherein the dustproof assembly comprises an organ dustproof cover for sealing the sliding grooves and the air cylinders in the sliding grooves, an outer dustproof cover fixedly arranged on the periphery between the rear cover and the front cover, and an inner dustproof cover fixedly arranged on the peripheral wall of the central hole of the front cover.
The utility model has the positive effects that: (1) According to the utility model, through the structural design of the synchronizing mechanism including the tensioning pulley block, each flexible connecting piece always and automatically maintains a tensioning state in the long-term operation process of the chuck, so that the synchronous precision of the operation of the chuck can be ensured for a long time, and the technical problem that the working precision of the synchronizing mechanism is influenced by the clearance generated by the abrasion of the chain sprocket in the long-term operation process of the chuck commonly existing in the synchronizing mechanism which mainly comprises the chain sprocket is effectively solved. (2) According to the utility model, through the improved design of the integral structure, the dustproof assembly comprising the inner dustproof cover, the outer dustproof cover and the organ dustproof cover is arranged, so that the dustproof chip performance of the chuck is superior to that of the existing chuck of the same type.
Drawings
FIG. 1 is a schematic elevational view of the present utility model, with an organ dust shield omitted;
FIG. 2 is a schematic perspective view of the present utility model, with an organ dust shield omitted;
FIG. 3 is a schematic view of the front cover of FIG. 1, as viewed from the rear end thereof;
Fig. 4 is a schematic perspective view of fig. 3.
The reference numerals in the above figures are as follows:
A frame 1; a rotation driving mechanism 2; a rear cover 3; front cover 4, central hole 41, chute 42, connecting rod 43; a cylinder 5, a cylinder 51, a piston rod 52, a piston rod fixing plate 53; a clamping jaw 6, a clamping jaw 61 which is vertically arranged, and a clamping jaw 62 which is horizontally arranged; the synchronous mechanism 7, the horizontal pulling plate 71, the vertical pulling plate 72, the fixed pulley block 73, the fixed frame 73-1, the pulley 73-2, the tensioning pulley block 74, the base 74-1, the sliding frame 74-2, the connecting rod 74-3, the elastic element 74-4 and the locking nut 74-5; a flexible connection 75; a dust assembly 8, an organ dust cover 81, an outer dust cover 82, and an inner dust cover 83.
Detailed Description
The utility model will be described in further detail with reference to the drawings and the detailed description.
Example 1
In this embodiment, the direction shown in fig. 1 is taken as the front in the description, and the direction opposite to the direction shown in fig. 1 is taken as the rear in the description, and the up-down and left-right directions in fig. 1 are still up-down and left-right directions in the description.
Referring to fig. 1 to 4, the four-jaw chuck of the present embodiment is mainly composed of a frame 1, a rotary drive mechanism 2, a rear cover 3, a front cover 4, an air cylinder 5, a clamping jaw 6, a synchronizing mechanism 7, and a dust-proof assembly 8.
The frame 1 is used as a mounting base of the four-jaw chuck of the embodiment, the rotary driving mechanism 2 is arranged on the frame 1 and is used for driving the rear cover 3, the front cover 4, the air cylinder 5, the clamping jaw 6 and the synchronous mechanism to integrally rotate during use, the rear cover 3 is a disc-shaped structural member with a hole in the middle, the rear cover 3 is rotatably arranged on the frame 1 in transmission connection with the rotary driving mechanism 2, and the structure and the working principle of the frame 1, the rotary driving mechanism 2 and the rear cover 3 are all mature prior art, and are not repeated.
The front cover 4 is a disc-shaped structural member as a whole, and a central hole 41 for passing a workpiece during use is axially and penetratingly arranged in the middle of the front cover 4; four sliding grooves 42 are formed in the front cover 4 in the up-down direction and the left-right direction, the front cover 4 and the rear cover 3 are fixedly connected to the front side of the rear cover 3, and specifically, the front cover 4 is fixedly connected with the rear cover 3 through four connecting rods 43.
The air cylinders 5 are commercial parts, the air cylinders 5 are provided with four air cylinders 51 and piston rods 52, the four air cylinders 5 are slidably arranged in corresponding sliding grooves 42 of the front cover 4 respectively through the air cylinders 51, and the outer ends of the piston rods 52 of the four air cylinders 5 are fixedly connected with the front cover 4 respectively. Preferably, each cylinder 5 is provided with a piston rod fixing plate 53; the four piston rod fixing plates 53 are fixedly arranged at the outer ends of the four sliding grooves 42 of the front cover 4, and the outer ends of the piston rods 52 of the four air cylinders 5 are fixedly connected with the corresponding piston rod fixing plates 53, so that the front cover 4 is fixedly connected. In operation, when the piston rod 52 of the cylinder 5 is moved in extension/retraction, the cylinder body 51 is correspondingly moved in a straight line in the chute 42 towards/away from the central bore 41. It will be apparent to those skilled in the art that the cylinder may be replaced by a hydraulic cylinder, a motor, or other power device having a power output.
The clamping jaw 6 is used for centering and clamping a workpiece during use. The clamping jaw 6 is fixedly arranged on the front end face of the cylinder body 51 of the four cylinders 5, wherein two clamping jaws 6 arranged on the two cylinders 5 moving up and down are upward clamping jaws 61, and two clamping jaws 6 arranged on the two cylinders 5 moving left and right are left and right clamping jaws 62; the clamping jaw 6 is per se of the prior art, and the specific structure thereof is not described in detail.
The synchronous mechanism 7 is a synchronous mechanism with an automatic tensioning and adjusting function, and the synchronous mechanism 7 is arranged at the rear end of the front cover 4 and fixedly connected with the cylinder body 51 of each cylinder 5 and is used for realizing synchronous movement of two upper and lower clamping jaws 61 and two left and right clamping jaws 62 respectively during working so as to ensure the clamping precision of two pairs of clamping jaws 6 during chuck working. As a specific implementation manner, in this embodiment, the synchronization mechanism 7 mainly includes a horizontal pull plate 71, a vertical pull plate 72, a fixed pulley block 73, a tensioning pulley block 74, and a flexible connection member 75.
The horizontal pulling plate 71 is a plate body structural member which is integrally formed by a base plate and two arm plates and is U-shaped integrally, the structure of the vertical pulling plate 72 is the same as that of the horizontal pulling plate 71, and two horizontal pulling plates 71 and two vertical pulling plates 72 are respectively arranged; the two horizontal pulling plates 71 and the two vertical pulling plates 72 are fixedly connected with the rear end of the cylinder body 51 of the corresponding one of the cylinders 5 from the middle of the base plates.
The fixed pulley block 73 mainly comprises a fixed frame 73-1 and pulleys 73-2 rotatably arranged in the fixed frame 73-1, four sets of fixed pulley blocks 73 are fixedly arranged on the rear end face of the front cover 4, and each set of fixed pulley block 73 is fixedly connected with the rear end face of the front cover 4 through the fixed frame 73-1. Wherein, two fixed pulley blocks 73 are respectively fixedly arranged on the left side and the right side of a chute 42 which is arranged in the up-down direction of the front cover 4; the other two fixed pulley blocks 73 are respectively fixedly arranged on the upper side and the lower side of the left-right sliding groove 42 of the front cover 4.
The tensioning pulley block 74 mainly comprises a base 74-1 fixedly connected with the front cover 4, a sliding frame 74-2 movably arranged on the base 74-1, a second pulley (not labeled in the figure) rotatably arranged in the sliding frame 74-2, two connecting rods 74-3 movably arranged on the base 74-1, one end of each connecting rod 74-3 is fixedly connected with the sliding frame 74-2, the other end of each connecting rod extends out of the base 74-1, one elastic element 74-4 is sleeved on one end of each connecting rod 74-3 extending out of the base 74-1, and one locking nut 74-5 is arranged on the outer end of each connecting rod 74-3, and two ends of each elastic element 74-4 are respectively in elastic abutting connection with the base 74-1 and the locking nut 74-5. Preferably, the resilient member 74-4 is a spring. Four tensioning pulley blocks 74 are fixedly arranged on the rear end face of the front cover 4, and each tensioning pulley block 74 is matched with the arrangement position of one fixed pulley block 73 and is oppositely arranged on the rear end face of the front cover 4.
Four flexible connectors 75 are provided; each flexible connection 75 is closed around a pulley 73-2 of one fixed pulley block 73 and a second pulley of the tensioning pulley block 74, which are arranged opposite each other. Two of the four flexible connectors 75 are used for synchronization in the left-right direction, and the other two are used for synchronization in the up-down direction.
One of the two horizontal pulling plates 71 is fixedly connected with the outer side parts of the two flexible connectors 75 which are synchronous in the left-right direction by the two arm plates, and the other horizontal pulling plate 71 is fixedly connected with the inner side parts of the two flexible connectors 75 which are synchronous in the left-right direction by the two arm plates; one of the two vertical pulling plates 72 is fixedly connected with the part of the two arm plates, which is positioned outside, of the two flexible connecting pieces 75 which are synchronous up and down, and the other vertical pulling plate 72 is fixedly connected with the part of the two arm plates, which is positioned inside, of the two flexible connecting pieces 75 which are synchronous up and down. Thus, during operation, the two horizontal pulling plates 71 move synchronously under the constraint of the two flexible connectors 75 for horizontal synchronization, and the two vertical pulling plates 72 move synchronously under the constraint of the two flexible connectors 75 for vertical synchronization, so that the pair of horizontal clamping jaws 62 and the pair of vertical clamping jaws 61 are respectively restrained to move synchronously by the two cylinders 5 for horizontal movement and the two cylinders 5 for vertical movement.
In the long-term operation process of the four-jaw chuck of the embodiment, when the flexible connecting piece 75, the pulley 73-2 of the fixed pulley block 73 and the second pulley of the tensioning pulley block 74 are in a clearance due to abrasion, the restoring elastic force of the two elastic elements 74-4 of the tensioning pulley block 74 enables the sliding frame 74-2 to move outwards through the transmission of the two connecting rods 74-3, and further the second pulley arranged in the sliding frame 74-2 moves outwards, so that the flexible connecting piece 75 is always kept in a tensioning state, and the synchronous precision of the chuck can be ensured for a long time. The technical problem that the working accuracy of the synchronous mechanism is affected by gaps generated by abrasion of the chain sprocket in the long-term operation process of the chuck existing in the conventional synchronous mechanism which is mainly composed of the chain sprocket is effectively solved.
The flexible connection 75 may be a chain, timing belt, wire rope, or the like, and the pulley 73-2 and the second pulley may be a sprocket, a timing wheel, or a light wheel, respectively. In this embodiment, the flexible connection 75 is preferably a chain, and the pulley 73-2 and the second pulley are correspondingly sprockets.
When the device works, the two cylinders 5 arranged in the two upward and downward sliding grooves 42 act cooperatively under the action of the synchronizing mechanism 7, so that the two upward and downward clamping jaws 61 are driven to synchronously clamp a workpiece in the middle or release the workpiece from the center; the two cylinders 5 provided in the two left and right slide grooves 42 operate in tandem under the action of the synchronizing mechanism 7, and drive the two left and right clamping jaws 62 to synchronously clamp the workpiece in the middle or release the workpiece away from the center.
The dust assembly 8 includes an organ dust cover 81, and an inner dust cover 83. The organ dust-proof cover 81 is fixedly arranged at each chute 42 on the front cover 4, and is used for sealing the chute 42 and the air cylinder 5 in the chute. The outer dust cover 82 is fixedly arranged on the periphery between the rear cover 3 and the front cover 4; the inner dust cover 83 is fixedly provided on the peripheral wall of the center hole 41 of the front cover 4. Through setting up dustproof subassembly 8, can prevent effectively that the dust from getting into inside the chuck in the work.
The above embodiments are illustrative of the specific embodiments of the present utility model, and not restrictive, and various changes and modifications may be made by those skilled in the relevant art without departing from the spirit and scope of the utility model, and all such equivalent technical solutions are intended to be included in the scope of the utility model.
Claims (8)
1. The utility model provides a four-jaw chuck, includes the frame, locates rotary driving mechanism in the frame, with rotary driving mechanism transmission connection rotationally locates the back lid in the frame, with back lid fixed connection and be equipped with the centre bore and divide the upper and lower to and control the protecgulum that is equipped with two spouts respectively, have four cylinders of cylinder body and piston rod respectively, respectively fixed clamping jaw that sets up one on the preceding terminal surface of the cylinder body of every cylinder, four cylinders respectively by its cylinder body movably set up one in one spout of protecgulum, and the outer end of the piston rod of every cylinder respectively with protecgulum fixed connection, its characterized in that: the clamping jaw clamping device also comprises a synchronous mechanism which is fixedly connected with the rear ends of the cylinder bodies of the four cylinders and is used for realizing synchronous movement of the clamping jaw and has an automatic tensioning and adjusting function.
2. The four-jaw chuck according to claim 1, wherein: the synchronous mechanism comprises two horizontal pull plates, two vertical pull plates, four sets of fixed pulley blocks, four sets of tensioning pulley blocks and four flexible connecting pieces; the two horizontal pull plates and the two vertical pull plates are fixedly connected with the rear end of the cylinder body of one cylinder respectively; the four fixed pulley blocks are respectively fixedly arranged on the left side and the right side of an upward chute and a downward chute of the front cover and the upper side and the lower side of the leftward chute; the four tensioning pulley blocks are fixedly arranged on the left side and the right side of the other upward and downward chute of the front cover and the upper side and the lower side of the other leftward and rightward chute respectively; four flexible connecting pieces are arranged in a closed loop manner between a set of fixed pulley blocks and a tensioning pulley block which are oppositely arranged.
3. The four-jaw chuck according to claim 2, wherein: the fixed pulley blocks comprise fixing frames and pulleys rotatably arranged in the fixing frames, and each fixed pulley block is fixedly connected with the rear end face of the front cover through the fixing frames.
4. A four-jaw chuck according to claim 3, wherein: the tensioning pulley block comprises a base fixedly connected with the front cover, a sliding frame movably arranged on the base, a second pulley rotatably arranged in the sliding frame, two connecting rods movably arranged on the base, one end of each connecting rod is fixedly connected with the sliding frame, the other end of each connecting rod extends out of the base, an elastic element is sleeved on the extending end of each connecting rod, and a locking nut is arranged at the outer end of each connecting rod; two ends of each elastic element are respectively elastically abutted with the base and the lock nut; each flexible connecting piece is in fit and wound connection with a pulley of a corresponding set of fixed pulley blocks and a second pulley of the tensioning pulley block.
5. The four-jaw chuck as set forth in claim 4, wherein: the elastic element is a spring.
6. The four-jaw chuck as set forth in claim 4, wherein: the flexible connecting piece is a chain, a synchronous belt or a steel wire rope; correspondingly, the pulley and the second pulley are sprockets, or synchronous wheels, or smooth wheels.
7. The four-jaw chuck according to claim 1, wherein: each cylinder is provided with a piston rod fixing plate; the outer ends of the piston rods of each cylinder are fixedly connected with the corresponding piston rod fixing plate.
8. The four-jaw chuck according to claim 1, wherein: the dustproof assembly comprises an organ dustproof cover for sealing the sliding grooves and the air cylinders in the sliding grooves, an outer dustproof cover fixedly arranged on the periphery between the rear cover and the front cover, and an inner dustproof cover fixedly arranged on the peripheral wall of the central hole of the front cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322721799.0U CN221185156U (en) | 2023-10-10 | 2023-10-10 | Four-jaw chuck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322721799.0U CN221185156U (en) | 2023-10-10 | 2023-10-10 | Four-jaw chuck |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221185156U true CN221185156U (en) | 2024-06-21 |
Family
ID=91488990
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322721799.0U Active CN221185156U (en) | 2023-10-10 | 2023-10-10 | Four-jaw chuck |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221185156U (en) |
-
2023
- 2023-10-10 CN CN202322721799.0U patent/CN221185156U/en active Active
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