阅读说明：本技术 一种自锁式旋转夹具 (self-locking type rotary clamp ) 是由 吴昊捷 苏建良 周硕 于 2019-12-02 设计创作，主要内容包括：本发明属于机械夹具领域,公开了一种自锁式旋转夹具。其中,固定座包括安装座、收紧套和固定板,收紧套和固定板分别设置于安装座两侧；中心轴活动穿设于固定座中；夹头和活动板分别连接于中心轴两端,夹头和收紧套位于安装座的同一侧；多个弹性件夹设于固定板和活动板之间；驱动结构能够驱动活动板朝向固定板移动,弹性件能够顶靠活动板远离固定板,通过中心轴带动夹头伸入收紧套中夹紧工件,驱动结构驱动活动板朝向固定板移动时,中心轴带动夹头从收紧套中伸出,解除对工件的夹紧。该自锁式旋转夹具利用内力便能完成工件的拆装夹,对转台强度要求低,且操作简便、省时。(The invention belongs to the field of mechanical clamps, and discloses self-locking rotary clamps, wherein a fixed seat comprises a mounting seat, a tightening sleeve and a fixed plate, the tightening sleeve and the fixed plate are respectively arranged on two sides of the mounting seat, a central shaft is movably arranged in the fixed seat in a penetrating manner, a chuck and a movable plate are respectively connected to two ends of the central shaft, the chuck and the tightening sleeve are positioned on the same side of the mounting seat, a plurality of elastic pieces are clamped between the fixed plate and the movable plate, a driving structure can drive the movable plate to move towards the fixed plate, the elastic pieces can be abutted against the movable plate to be far away from the fixed plate, the chuck is driven by the central shaft to extend into the tightening sleeve to clamp a workpiece, and when the driving structure drives the movable plate to move towards the fixed plate, the central shaft drives the chuck to extend out of the tightening sleeve to release clamping of the workpiece.)

1, kind of self-locking rotary fixture, its characterized in that includes:

the fixing seat (1) comprises a mounting seat (15), a tightening sleeve (11) and a fixing plate (12), wherein the tightening sleeve (11) is arranged on the side of the mounting seat (15), and the fixing plate (12) is arranged on the other side of the mounting seat (15);

the central shaft (2) is movably arranged in the fixed seat (1) in a penetrating way;

a collet (3) connected to the end of the central shaft (2), the collet (3) and the tightening sleeve (11) being located on the same side of the mounting seat (15);

a movable plate (4) connected to another end of the central shaft (2), the movable plate (4) and the fixed plate (12) being located on the same side of the mounting seat (15);

the elastic pieces (5) are clamped between the fixed plate (12) and the movable plate (4), and the elastic pieces (5) are configured to drive the movable plate (4) to be away from the fixed plate (12), so that the movable plate (4) drives the chuck (3) to extend into the tightening sleeve (11) through the central shaft (2) and clamp a workpiece;

the driving structure (6) can drive the movable plate (4) to move towards the fixed plate (12) and drive the chuck (3) to extend out of the tightening sleeve (11), and the clamping of the workpiece is released.

2. The self-locking rotary clamp according to claim 1, wherein the collet (3) comprises a plurality of elastic clamping jaws, the outer sides of the clamping jaws are beveled, and when the collet (3) is inserted into the tightening sleeve (11), the tightening sleeve (11) presses the clamping jaws towards each other through the outer sides of the clamping jaws.

3. The self-locking rotary clamp according to claim 1, wherein the plurality of elastic members (5) are uniformly distributed in a circumferential manner around the center of the movable plate (4).

4. The self-locking rotary clamp according to claim 1, wherein the fixing base (1) further comprises a plurality of connecting rods (13), wherein ends of the plurality of connecting rods (13) are connected with the fixing plate (12), and the other ends are connected with the tightening sleeve (11).

5. The self-locking rotary clamp according to claim 4, wherein the fixing base (1) further comprises a gear (14), the gear (14) is disposed on the connecting rod (13), and in the clamping state, when an external driving structure drives the gear (14) to rotate, the gear (14) can drive the tightening sleeve (11) and the clamping head (3) to rotate.

6. The self-locking rotary clamp according to claim 1, wherein the driving structure (6) comprises a fixed frame (61) and a transmission mechanism (62), the fixed frame (61) is used for fixedly supporting the transmission mechanism (62), and the transmission mechanism (62) can drive the movable plate (4) to move towards the fixed plate (12).

7. The self-locking rotary clamp according to claim 6, wherein the transmission mechanism (62) comprises a top head (621) and an upper cylinder (622), the upper cylinder (622) is disposed on the fixed frame (61), the top head (621) is connected with an output end of the upper cylinder (622), and the upper cylinder (622) can drive the top head (621) to abut against the movable plate (4) to drive the movable plate (4) to move towards the fixed plate (12).

8. The self-locking rotary clamp according to claim 7, wherein the fixing frame (61) comprises a plurality of hooks (611) and a bottom plate (612), the plurality of hooks (611) are connected to the bottom plate (612), and the heads of the hooks (611) are located between the fixing plate (12) and the fixing base (1).

9. The self-locking rotary clamp according to claim 8, wherein the fixing frame (61) further comprises a guide post (613), a mounting plate (614) and a lower cylinder (615), the lower cylinder (615) is disposed on the mounting plate (614), the end of the guide post (613) is connected to the mounting plate (614), the end of the guide post penetrates out of the bottom plate (612), and the output end of the lower cylinder (615) is connected to the upper cylinder (622) through a buffer (623).

10. The self-locking rotary clamp according to claim 9, wherein limiting columns (7) are provided on the side of each elastic member (5), and the length of the limiting columns (7) is smaller than that of the elastic member (5) in a free state.

Technical Field

The invention belongs to the field of mechanical clamps, and particularly relates to self-locking type rotary clamps.

Background

In the mechanical field, the fixture is used as a necessary tool in the machining process, and the speed of assembly and disassembly and the requirement condition on the mounting table seriously affect the machining efficiency and the input cost.

The existing rotary clamp still needs to increase external force to complete the dismounting and mounting of the shaft parts, so that the time consumption is long, the requirement on the strength of a turntable is high, meanwhile, due to the fact that the external force is applied, clamping parts are easily damaged, the production time is long, the cost input is high, the yield is low, and further the processing efficiency is seriously influenced.

Therefore, there is a need for self-locking rotary clamps with easy assembly and disassembly to solve the above-mentioned problems.

Disclosure of Invention

The invention aims to provide self-locking rotary clamps, which can complete the clamping and dismounting of workpieces by utilizing the internal force of the clamps without additionally providing external force during working, have low requirement on the strength of a turntable, and are simple and convenient to operate and time-saving.

In order to achieve the purpose, the invention adopts the following technical scheme:

A self-locking rotary clamp, comprising:

the fixing seat comprises a mounting seat, a tightening sleeve and a fixing plate, the tightening sleeve is arranged on the side of the mounting seat, and the fixing plate is arranged on the other side of the mounting seat;

the central shaft is movably arranged in the fixed seat in a penetrating way;

a collet coupled to an end of the central shaft, the collet and the tightening sleeve being located on the same side of the mount;

a movable plate connected to another end of the central shaft, the movable plate and the fixed plate being located on the same side of the mounting base;

the elastic pieces are clamped between the fixed plate and the movable plate, and the elastic pieces are configured to drive the movable plate to be away from the fixed plate, so that the movable plate drives the chuck to extend into the tightening sleeve through the central shaft and clamp a workpiece;

and the driving structure can drive the movable plate to move towards the fixed plate and drive the chuck to extend out of the tightening sleeve, so that the workpiece is released from being clamped.

Preferably, the chuck comprises a plurality of elastic clamping claws, the outer side surfaces of the clamping claws are in a diagonal shape, and when the chuck extends into the tightening sleeve, the tightening sleeve presses the plurality of clamping claws towards each other through the outer side surfaces of the clamping claws.

Preferably, the elastic members are uniformly distributed in a circumferential manner around the center of the movable plate.

Preferably, the fixing base further comprises a plurality of connecting rods, wherein ends of the connecting rods are connected with the fixing plate, and the ends of the connecting rods are connected with the tightening sleeve.

Preferably, the fixing seat further comprises a gear, the gear is arranged on the connecting rod, and when the gear is driven to rotate by an external driving structure in a clamping state, the gear can drive the tightening sleeve and the chuck to rotate.

Preferably, the driving structure includes a fixed frame and a transmission mechanism, the fixed frame is used for fixedly supporting the transmission mechanism, and the transmission mechanism can drive the movable plate to move towards the fixed plate.

Preferably, the transmission mechanism comprises a top head and an upper cylinder, the upper cylinder is arranged on the fixed frame, the top head is connected with the output end of the upper cylinder, and the upper cylinder can drive the top head to abut against the movable plate so as to drive the movable plate to move towards the fixed plate.

Preferably, the fixing frame comprises a plurality of hook claws and a base plate, the hook claws are connected to the base plate, and claw heads of the hook claws are located between the fixing plate and the fixing seat.

Preferably, the fixing frame further includes a guide post, a mounting plate, and a lower cylinder, the lower cylinder is disposed on the mounting plate, an end of the guide post is connected to the mounting plate, another end of the guide post penetrates out of the bottom plate, and an output end of the lower cylinder is connected to the upper cylinder through a buffer.

Preferably, stopper posts are provided on the side of each elastic member, and the length of the stopper posts is smaller than that of the elastic member in a free state.

The invention has the advantages of

When the self-locking rotary clamp clamps a workpiece, the elastic piece drives the movable plate to be away from the fixed plate, so that the movable plate drives the chuck to extend into the tightening sleeve through the central shaft and clamp the workpiece; when the driving structure works, the driving structure drives the movable plate to move towards the fixed plate and drives the chuck to extend out of the tightening sleeve, and the workpiece is released from being clamped. The clamping and unlocking of the clamp on the workpiece completely depends on the internal force of the clamp, and no external force is applied by equipment except the clamp, so that the weight of the whole equipment is not required to be additionally increased, the requirement on the strength of the turntable is low, the operation is simple, the time is saved, and the processing efficiency can be effectively improved.

Drawings

FIG. 1 is a schematic front structural view of a self-locking rotary clamp provided by the present invention;

FIG. 2 is a schematic view of the internal structure of the fixing seat of the self-locking rotary clamp provided by the invention;

fig. 3 is a schematic view of a chuck structure of the self-locking rotary clamp provided by the invention.

In the figure:

1. a fixed seat; 2. a central shaft; 3. a chuck; 4. a movable plate; 5. an elastic member; 6. a drive structure; 7. a limiting column;

11. tightening the sleeve; 12. a fixing plate; 13. a connecting rod; 14. a gear; 15. a mounting seat;

61. a fixed mount; 62. a transmission mechanism;

611. hooking claws; 612. a base plate; 613. a guide post; 614. mounting a plate; 615. a lower cylinder; 621. ejecting the head; 622. an upper cylinder; 623. a buffer.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar parts throughout or parts having the same or similar functions. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" shall be construed , for example, as meaning either fixed or removable, mechanically or electrically, directly or indirectly through an intermediate, either internally or in any other relationship, unless expressly stated otherwise.

In the description of the invention, unless expressly stated or limited otherwise, the feature may be "on" or "under" a second feature may include the feature directly contacting the second feature, or may include the feature and the second feature not directly contacting but contacting through another feature in between, and furthermore, the feature "on", "above" and "above" the second feature includes the feature directly above and obliquely above the second feature, or merely means that the feature is at a higher level than the second feature, the feature "below", "under" and "under" the second feature includes the feature directly below and obliquely below the second feature, or merely means that the feature is at a lower level than the second feature.

The technical solution of the present invention is further illustrated by the following detailed description with reference to the drawings.

As shown in fig. 1-3, the present invention provides self-locking rotary jigs, which include a fixed base 1, a central shaft 2, a collet 3, a movable plate 4, elastic members 5 and a driving structure 6, wherein the fixed base 1 includes a mounting base 15, a tightening sleeve 11 and a fixed plate 12, the tightening sleeve 11 is disposed on the side of the mounting base 15, the fixed plate 12 is disposed on the other side of the mounting base 15, the central shaft 2 is movably inserted into the fixed base 1, the collet 3 is connected to the end of the central shaft 2, the collet 3 and the tightening sleeve 11 are disposed on the same side of the mounting base 15, the movable plate 4 is connected to the other end of the central shaft 2, the movable plate 4 and the fixed plate 12 are disposed on the same side of the mounting base 15, a plurality of elastic members 5 are interposed between the fixed plate 12 and the movable plate 4, and the elastic members 5 are configured to be capable of driving the movable plate 4 to move the movable plate 4 away from.

The driving structure can drive the movable plate 4 to move towards the fixed plate 12 and drive the chuck 3 to extend out of the tightening sleeve 11, so as to release the clamping of the workpiece.

When the self-locking rotary clamp is used for clamping a workpiece in the embodiment, the elastic piece 5 is in a compression state, the upward force of the elastic piece 5 is transmitted through the central shaft 2 to drive the chuck 3 to extend into the tightening sleeve 11 and clamp the workpiece, when the unlocking is needed, the driving structure 6 drives the movable plate 4 to move towards the fixed plate 12, steps of compressing the elastic piece 5 are carried out, the chuck 3 is driven to move upwards through the central shaft 2, the chuck 3 is separated from the tightening sleeve 11, the clamping part is loosened, the unlocking action is completed, the operation process completely depends on the internal force of the clamp, no external force is required, the requirement on the strength of the rotary table is low, the operation is simple, the time is saved, and the processing efficiency can be effectively.

Alternatively, the collet 3 comprises a plurality of resilient clamping jaws, the outer sides of the clamping jaws are chamfered, and when the collet 3 is inserted into the tightening sleeve 11, the tightening sleeve 11 presses the plurality of clamping jaws towards each other via the chamfered outer sides of the clamping jaws to clamp the member to be clamped, as shown in fig. 3. in this embodiment, the collet 3 is provided with 3 clamping jaws.

Specifically, the plurality of elastic members 5 are uniformly distributed in a circumferential manner around the center of the movable plate 4, wherein the elastic members 5 may be springs, rubber, or other elements with elastic recovery. In this embodiment, be the circular form evenly distributed with 5 springs, the centrifugal force that produces when reducible anchor clamps are rotatory guarantees that anchor clamps rotate steadily.

Optionally, the fixing base 1 further includes a plurality of connecting rods 13 and a gear 14, an end of the connecting rods 13 is connected with the fixing plate 12, another end is connected with the tightening sleeve 11, the gear 14 is disposed on the connecting rods 13, the connecting rods 13 are connected with the fixing plate 12 and the tightening sleeve 11 in a matching manner, the connecting rods 13 and the tightening sleeve 11 with proper sizes can be selected according to the size of the component to be clamped, and universality of the application range of the self-locking rotary clamp is ensured.

Specifically, the driving structure 6 includes a fixed frame 61 and a transmission mechanism 62, the fixed frame 61 is used for fixedly supporting the transmission mechanism 62, and the transmission mechanism 62 can drive the movable plate 4 to move towards the fixed plate 12. Providing an unlocking driving force for the clamp.

More specifically, the transmission mechanism 62 includes a top 621 and an upper cylinder 622, the upper cylinder 622 is disposed on the fixed frame 61, the top 621 is connected with an output end of the upper cylinder 622, and the upper cylinder 622 can drive the top 621 against the movable plate 4 to drive the movable plate 4 to move toward the fixed plate 12.

Specifically, the fixing frame 61 includes hooks 611, a bottom plate 612, guide posts 613, a mounting plate 614 and a lower cylinder 615, wherein the hooks 611 are connected to the bottom plate 612, the heads of the hooks 611 are located between the fixing plate 12 and the fixing base 1, when the fixing frame is unlocked, the top 621 abuts against the movable plate 4, the movable plate 4 generates an upward thrust on the fixing plate 12 through the elastic member 5, the hooks abut against the fixing plate 12, the force generated by the elastic member 5 on the fixing plate 12 is balanced, so that the clamp is stable when the fixing frame is unlocked, the lower cylinder 615 is disposed on the mounting plate 614, the end of the guide post 613 is connected to the mounting plate 614, the end penetrates out of the bottom plate 612, the output end of the lower cylinder 615 is connected to the upper cylinder 622 through a buffer 623, the linear bearing is sleeved at the connection position of the guide post 613 and the bottom plate 612, when the lower cylinder 615 is deflated, the buffer 623 connected to the output end of the lower cylinder moves down, so as to drive the upper cylinder 622, the bottom plate 612 and the hooks 611 move down, the hooks abut against the fixing plate 12, so.

Alternatively, stopper posts 7, which are shorter than the elastic member 5 in the locked state, are provided on the side of each elastic member 5.

When the unlocking is required, the top 621 of the driving structure 6 moves upward to drive the movable plate 4 to move toward the fixed plate 12, steps compress the elastic element 5, and after the movable plate 4 moves distance toward the fixed plate 12, the movable plate 4 abuts against the limiting column 7, at this time, the movable plate 4 stops moving, so as to control the length of the chuck 3 which is released from the tightening sleeve 11, and prevent the clamping element from falling off due to too long releasing.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.