CN203427046U - Clamping device with self lock - Google Patents

Abstract

A clamping device with self-locking, comprising a fixed seat and at least two clamping parts, a self-locking mechanism is fixedly installed on the fixed seat, a sliding seat sliding relative to the fixed seat is connected below the self-locking mechanism, the fixed A spring is installed between the seat and the sliding seat. At least two guide rods are installed on the sliding seat. The lower end of the guide rod is fixedly installed on the sliding seat, and the upper end of the guide rod passes through the fixed seat. connected, and the lower end of the clamping piece is connected with the sliding seat. The utility model is a clamping device with self-locking, which has the advantages of simple structure, convenient operation, wide application range and the like. Moreover, compared with the traditional clamping device, the manufacturing cost and the use cost are lower, and the processing cost of parts is reduced.

Description

A clamping device with self-locking

technical field

The utility model relates to a clamping device with self-locking, which belongs to the installation part of a production line mechanical arm.

Background technique

Clamping devices are widely used in automated production lines, and the clamping devices are usually connected with manipulators to clamp workpieces. A general clamping device includes at least two clamping parts that can move relatively, and the driving elements drive the clamping parts to move away or approach relatively to clamp or loosen the workpiece. However, the traditional clamping device has the following disadvantages: 1), Most of the clamping devices use pneumatic or electric drive components, the use of such components increases the manufacturing cost and use cost of the clamping device; 2), the dimensions and specifications of the clamping device are usually fixed, and can only clamp during its use Corresponding to a single-sized object; 3) Excessive clamping force will cause the clamped object to be easily bonded to the clamping part, which is not conducive to the detachment of the clamped object, thus making it inconvenient to use. In view of the above technical problems, it is necessary to provide a clamping device that does not need a driving element, is applicable to objects of different sizes, and is easy to disengage from the clamped object.

Contents of the invention

In order to solve the above-mentioned technical problems, the utility model provides a clamping device with self-locking, which does not need a driving element, and the clamping part is applicable to objects of various sizes and shapes.

The technical solution adopted by the utility model is: a clamping device with self-locking, including a fixed base and at least two clamping parts, a self-locking mechanism is fixedly installed on the fixed base, and a relatively fixed clamp is connected below the self-locking mechanism. The sliding seat slides, a spring is installed between the fixed seat and the sliding seat, at least two guide rods are installed on the sliding seat, the lower end of the guide rod is fixedly installed on the sliding seat, and the upper end of the guide rod passes through the fixed seat. The upper end of the clamping part is connected with the fixed seat, and the lower end of the clamping part is connected with the sliding seat.

The fixing seat is provided with a mounting pin seat, and a mounting plate is fixedly installed on the sliding seat. The upper end of the rod is connected with the mounting pin seat pin, the lower end of the first connecting rod is connected with the second connecting rod pin; The connecting rod and the fourth connecting rod are connected with pins, the second connecting rod is connected with the third connecting rod with pins, and a coil spring is arranged between the second connecting rod and the third connecting rod.

The self-locking mechanism includes an end cover, an outer cylinder, an indexing cylinder, an ejector pin, and a sliding sleeve. The end cover is fixed on one end of the outer cylinder, the outer cylinder is fixedly mounted on a fixing seat, and the indexing cylinder is fixed inside the other end of the outer cylinder. There are multiple symmetrical indexing claws on the upper end of the indexing cylinder. There are guide grooves between the indexing claws. The sliding sleeve is installed inside the indexing cylinder. The sliding claws and guide blocks are evenly arranged on the upper end of the sliding sleeve. The guide blocks are intermittently arranged on the sliding sleeve. The claw is directly below and corresponds to the guide groove; the upper end of the top pin is evenly provided with a symmetrical limit block, and the lower end of the top pin is provided with a long rod. The limit block can slide up and down along the guide groove. The lower end of the limit block is pointed and the long rod Through the sliding sleeve and the sliding seat, the long rod can slide up and down relative to the sliding seat, and the lower end is provided with a limiting element.

At least two guide holes corresponding to the guide rods are opened on the fixing seat.

An installation hole for installing the self-locking mechanism is also provided in the center of the fixing seat.

A support plate is fixedly installed at the lower end of the sliding seat.

The utility model is a clamping device with self-locking. The up and down movement of the manipulator drives the relative movement between the fixed seat and the sliding seat, so that the clamping parts are closed or staggered to clamp or release the clamped object. The relative position between them is limited by the self-locking mechanism. The device of the utility model has the advantages of simple structure, convenient operation, wide application range and the like. Moreover, compared with the traditional clamping device, the manufacturing cost and the use cost are lower, and the processing cost of parts is reduced.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described:

Fig. 1 is a structural schematic diagram of the clamping device of the present invention.

Fig. 2 is a structural schematic diagram of the self-locking mechanism of the present invention.

Fig. 3 is a self-locking state diagram under the self-locking mechanism of the utility model.

Fig. 4 is a self-locking state diagram when the self-locking mechanism of the present invention is released.

Fig. 5 is a self-locking state diagram of the self-locking mechanism of the present invention.

Fig. 6 is a diagram of the self-locking state when the self-locking mechanism of the utility model is released.

Fig. 7 is a state view of the clamping device of the present invention when the object is clamped.

Fig. 8 is a state view of the clamping device of the present invention when the object is released.

Detailed ways

As shown in Figure 1, a clamping device with self-locking includes a fixed seat 1 installed on the manipulator, at least two symmetrical clamping parts 6, and a self-locking mechanism 2 is fixedly installed on the fixed seat 1, the described The bottom of the self-locking mechanism 2 is connected with a sliding seat 3 sliding relative to the fixed seat 1, a spring 5 is installed between the fixed seat 1 and the sliding seat 3, and at least two symmetrical guide rods 4 are installed on the sliding seat 3, The lower end of the guide rod 4 is fixedly installed on the sliding seat 3 , the upper end of the guide rod 4 passes through the fixed seat 1 , the upper end of the clamping part 6 is connected with the fixed seat 1 , and the lower end of the clamping part 6 is connected with the sliding seat 3 . The fixing base 1 is provided with at least two symmetrical guide holes 11 corresponding to the guide rods 4 . An installation hole 13 for installing the self-locking mechanism 2 is also provided in the center of the fixing base 1 .

A support plate 31 is fixedly installed at the lower end of the sliding seat 3 .

As shown in Figure 2, the self-locking mechanism 2 includes an end cover 21, an outer cylinder 22, an indexing cylinder 23, a top pin 24, and a sliding sleeve 25, and the end cover 21 is fixed on one end of the outer cylinder 22, and the outer cylinder 22 passes Fixedly installed on the fixed seat 1, the indexing cylinder 23 is fixed inside the other end of the outer cylinder 22, the upper end of the indexing cylinder 23 is provided with a plurality of symmetrical indexing claws 231, and the indexing claws 231 are provided with guide grooves 232, sliding sleeves 25 is installed inside the indexing cylinder 23, sliding claws 251 and guide blocks 252 are evenly arranged on the upper end of the sliding sleeve 25, and the guide blocks 252 are intermittently arranged directly below the sliding claws 251 and correspond to the guide grooves 232; Symmetrical limit block 241, the lower end of the top pin 24 is provided with a long rod 242, the limit block 241 can slide up and down along the guide groove 232, the lower end of the limit block 241 is pointed, and the long rod 242 passes through the sliding sleeve 25 and the sliding seat 3 , the long rod 242 can slide up and down relative to the sliding seat 3, and the lower end is provided with a limiting element 243.

The sliding seat 3 can slide up and down relative to the fixed seat 1 , the upper end position of the sliding seat 3 is limited by the outer cylinder 22 , and the lower end position of the sliding seat 3 is limited by the limiting element 243 at the lower end of the long rod 242 .

The process of holding objects:

When the clamping device is in an open state, the self-locking mechanism 2 is in a downward self-locking state, as shown in FIG. 3 . When the object needs to be clamped, the manipulator moves the clamping device directly above the object to be clamped, and the manipulator drives the clamping device to move downward. When the support plate 31 at the lower end of the sliding seat 3 touches the surface of the object to be clamped, the sliding seat 3 no longer Moving downward, the manipulator drives the fixed seat 1 to continue to move downward. At this time, the fixed seat 1 drives the clamping member 6 to close through the transmission between the connecting rods, and simultaneously drives the outer cylinder 22 of the self-locking mechanism 2 to move downward. At this time, The sliding sleeve 25 cannot move downward due to the lower end being restricted by the sliding seat 3. The stop block 241 on the ejector pin 24 is in contact with the sliding claw 251 on the sliding sleeve 25, and the ejector pin 24 cannot move downward because the indexing cylinder 23 As the outer cylinder 22 moves downward, the indexing cylinder 23 slides downward relative to the sliding sleeve 25 and the ejector pin 24 under the action of the guide groove 232 and the guide block 252 .

When the clamping block 66 on the clamping member 6 was in contact with the surface of the object to be clamped, the third connecting rod 64, the fourth connecting rod 65 and the clamping block 66 no longer acted. The connecting rod 61 drives the second connecting rod 62 to overcome the force of the coil spring 67 , so that the second connecting rod 62 rotates around the connecting pin between itself and the third connecting rod 64 , as shown in FIG. 7 . As the second connecting rod 62 rotates, the coil spring 67 generates a corresponding elastic force on the third connecting rod 64 , so that the clamping block 66 generates a clamping force on the clamped object. The larger the diameter of the object to be clamped, the larger the rotation angle of the second connecting rod 62 around the connecting pin between itself and the third connecting rod 64, and the greater the clamping force generated by the clamping block 66 on the clamped object. When the limit block 241 on the ejector pin 24 and the sliding claw 251 on the sliding sleeve 25 protrude from the indexing cylinder 23, the ejector pin 24 is not limited in the circumferential direction at this time, and under the action of gravity, the limit block 241 The lower tip slides along the hypotenuse of the sliding claw 251 to the bottom of the sliding claw 251, as shown in FIG. 4 . At this time, the ejector pin 24 has rotated a certain angle, and the limiting block 241 is no longer aligned with the guide groove 232 . The clamping device stops moving down, the manipulator drives the fixed seat 1 to move upward, the sliding seat 3, the ejector pin 24 and the sliding sleeve 25 do not move at this time, the outer cylinder 22 and the indexing cylinder 23 move upward relative to the ejector pin 24 and the sliding sleeve 25, When the index claw 231 on the index cylinder 23 is in contact with the limit block 241, the ejector pin 24 rises with the index cylinder 23 relative to the sliding sleeve 25. At the bottom of the indexing claw 231, the indexing claw 231 blocks the ejector pin 24, and the self-locking mechanism 2 is in an upper self-locking state, as shown in FIG. 5 . When the limiting element 243 at the lower end of the ejector pin 24 contacts the bottom surface of the sliding seat 3, the sliding seat 3 rises together with the fixed seat 1, thereby driving the clamping part 6 and the clamped object to rise together.

Release object process:

When the clamping device is in the clamping state, the self-locking mechanism 2 is in the upper self-locking state, as shown in FIG. 5 . When it is necessary to release the price of the clamped object, the manipulator moves the object to the platform to be placed, the manipulator drives the fixed seat 1 to move down, the sliding seat 3 does not move downward due to the support of the clamped object, and the sliding sleeve 25 is restricted by the sliding seat 3 due to the lower end Instead of moving downwards, the fixed seat 1 drives the outer cylinder 22, the indexing cylinder 23 and the ejector pin 24 of the self-locking mechanism 2 to move downward relative to the sliding sleeve 25. When the sliding claws 251 of the sliding claws are in contact with each other, the ejector pin 24 stops moving downward, and the indexing cylinder 23 slides downward relative to the sliding sleeve 25 and the ejector pin 24. When the limit block 241 on the ejector pin 24 and the sliding claw 251 on the sliding sleeve 25 protrude from the indexing cylinder 23, the ejector pin 24 is not limited in the circumferential direction at this time, and under the action of gravity, the limit block 241 The lower tip slides along the hypotenuse of the sliding claw 251 to the bottom of the sliding claw 251, as shown in FIG. 6 . At this time, the top pin 24 has rotated a certain angle, the clamping device stops moving down, the manipulator drives the fixed seat 1 to move upward, the sliding seat 3, the top pin 24 and the sliding sleeve 25 do not move at this time, and the outer cylinder 22 and the indexing cylinder 23 are opposite to each other. The ejector pin 24 and the sliding sleeve 25 move upwards. When the indexing claw 231 on the indexing cylinder 23 contacts with the tip of the limiting block 241, the limiting block 241 slides into the guide groove 232 along the slope of the indexing claw 231 under the action of gravity. The ejector pin 24 is unlocked, and along with the rise of the fixed seat 1, the sliding seat 3, the ejector pin 24 and the sliding sleeve 25 do not move. At this time, with the upward movement of the fixed seat 1 , the sliding seat 3 is always in contact with the clamped object under the action of the spring 5 , as shown in FIG. 8 . Keeping still, the angle between the second connecting rod 62 and the third connecting rod 64 gradually becomes smaller until it becomes zero. , the clamping block 66 is gradually separated from the surface of the clamped object. the

Until the guide block 252 on the sliding sleeve 25 contacts the bottom end of the guide groove 232, the self-locking mechanism 2 is in the lower self-locking state, as shown in FIG. 3 . The ejector pin 24 and the sliding sleeve 25 move upward with the indexing cylinder 23. When the limit element 243 at the lower end of the ejector pin 24 contacts the bottom surface of the sliding seat 3, the sliding seat 3 rises together with the fixed seat 1, so that the clamping device is separated from the clamped object. . During the whole process, due to the action of the spring 5 , the support plate 31 always exerts a downward pressure on the clamped object, which ensures the smooth separation of the clamped object from the clamping member 6 .

Claims (6)

1. the clamping device with self-locking, comprise holder (1), at least two holders (6), it is characterized in that, on holder (1), be installed with self-locking mechanism (2), described self-locking mechanism (2) below is connected with the sliding seat (3) that relative holder (1) slides, described holder (1), spring (5) is installed between sliding seat (3), at least two guide posts (4) are installed on described sliding seat (3), guide post (4) lower end is fixedly installed on sliding seat (3), guide post (4) upper end is through holder (1), described holder (6) upper end is connected with holder (1), holder (6) lower end is connected with sliding seat (3).

2. a kind of clamping device with self-locking according to claim 1, it is characterized in that, described holder (1) is provided with installs key seat (12), on described sliding seat (3), be installed with installing plate (63), holder (6) upper end is connected with holder (1) by first connecting rod (61), holder (6) lower end is connected with sliding seat (3) by installing plate (63), first connecting rod (61) upper end is connected with installation key seat (12) pin, and first connecting rod (61) lower end is connected with second connecting rod (62) pin;

Second connecting rod (62), third connecting rod (64), the 4th connecting rod (65) are connected with installing plate (63) pin respectively, grip block (66) is connected with third connecting rod (64), the 4th connecting rod (65) pin respectively, second connecting rod (62) is connected with third connecting rod (64) pin, between second connecting rod (62) and third connecting rod (64), is provided with wind spring (67).

3. a kind of clamping device with self-locking according to claim 1, it is characterized in that, described self-locking mechanism (2) comprises end cap (21), urceolus (22), index sleeve (23), ejector pin (24), sliding sleeve (25), end cap (21) is fixed on urceolus (22) one end, urceolus (22) is fixedly installed on holder (1), it is inner that index sleeve (23) is fixed on urceolus (22) other end, index sleeve (23) upper end is provided with the calibration pawl (231) of a plurality of symmetries, between calibration pawl (231), be provided with gathering sill (232), sliding sleeve (25) is installed on index sleeve (23) inside, sliding sleeve (25) upper end has been evenly arranged sliding pawl (251) and guide pad (252), guide pad (252) is intermittently arranged under sliding pawl (251) and is corresponding with gathering sill (232), ejector pin (24) upper end is evenly provided with symmetrical limited block (241), ejector pin (24) lower end is provided with stock (242), limited block (241) can slide up and down along gathering sill (232), limited block (241) lower end becomes pointed shape, stock (242) is through sliding sleeve (25) and sliding seat (3), stock (242) can slide up and down by relative sliding seat (3), and lower end is provided with limit element (243).

4. a kind of clamping device with self-locking according to claim 1, is characterized in that, has at least two pilot holes (11) corresponding with guide post (4) on described holder (1).

5. a kind of clamping device with self-locking according to claim 1, is characterized in that, described holder (1) center is provided with the installing hole (13) for self-locking mechanism (2) are installed.

6. a kind of clamping device with self-locking according to claim 1, is characterized in that, described sliding seat (3) lower end is installed with gripper shoe (31).

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