CN212071989U - Mechanical gripper with coaxial visual positioning function - Google Patents

Abstract

A mechanical gripper with a coaxial visual positioning function belongs to the technical field of mechanical grippers. The CCD camera comprises an installation plate, a motor fixed above the installation plate, a jaw plate fixed below the installation plate, a driving plate arranged above the jaw plate, at least two jaws arranged at intervals around the jaw plate and in transmission connection with the driving plate, and a driving shaft rotationally connected between the motor and the jaw plate and in threaded connection with the driving plate, wherein the jaw plate is provided with at least one CCD camera at the clamping position of the jaw. The structure of the mechanical gripper is simplified, the production cost is reduced, and the utilization efficiency of the motor is improved; the accuracy of grabbing the workpiece by the gripper is guaranteed, the machining efficiency is improved, and meanwhile potential safety hazards are eliminated.

Description

Mechanical gripper with coaxial visual positioning function

Technical Field

The utility model belongs to the technical field of mechanical tongs, concretely relates to mechanical tongs with coaxial visual positioning function.

Background

The mechanical gripper is one of the most commonly used mechanical tools in production work, and particularly, in some production links in the machining industry, the mechanical gripper is often used for carrying or clamping a workpiece. The position of a workpiece needs to be determined and a corresponding coordinate position needs to be set before the current mechanical gripper works, and then the mechanical gripper can accurately grip the workpiece.

The existing mechanical gripper is mainly controlled in several forms of pneumatics, oil cylinder driving, motor driving and the like, and the mechanical gripper driven by the motor has high working stability and larger gripping weight, so the mechanical gripper is widely applied. However, the problems of complex transmission structure, high production difficulty, high manufacturing cost and the like exist, and particularly, after the power of the motor on the mechanical gripper is subjected to multi-stage transmission, the power finally reaching the gripper is generally low; in addition, how to ensure that the mechanical gripper can accurately grip the workpiece each time is one of the problems that cannot be solved by the industry.

In view of the above, there is a need to design a mechanical gripper with coaxial visual positioning function, which has simple structure, low cost, high motor utilization efficiency, and can detect the position of a workpiece in real time and accurately grip the workpiece. The applicant has therefore made an advantageous design, in the context of which the solution to be described below is made.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a mechanical tongs with coaxial visual positioning function helps optimizing the drive structure of mechanical tongs and comes reduce cost and improve the utilization efficiency of motor, is favorable to improving the locate mode of mechanical tongs and guarantees that the tongs snatchs the accuracy nature of work piece, has not only improved machining efficiency but also eliminated the potential safety hazard.

In order to achieve the above purpose, the utility model provides a technical scheme is: a mechanical gripper with coaxial visual positioning function is characterized in that: the CCD camera comprises an installation plate, a motor fixed above the installation plate, a jaw plate fixed below the installation plate, a driving plate arranged above the jaw plate, at least two jaws arranged at intervals around the jaw plate and in transmission connection with the driving plate, and a driving shaft rotationally connected between the motor and the jaw plate and in threaded connection with the driving plate, wherein the jaw plate is provided with at least one CCD camera at the clamping position of the jaw.

In a specific embodiment of the present invention, the motor is fixed to the mounting plate by a motor mounting plate, a plurality of lower connecting rods are disposed below the motor mounting plate at intervals in a circumferential direction, a lower connecting rod screw hole is formed in the middle of the upper and lower ends of each lower connecting rod, the lower connecting rod screw hole of the lower end of each lower connecting rod is screwed to a lower connecting rod screw passing through the mounting plate from bottom to top, an upper connecting rod is disposed above the motor mounting plate at a position corresponding to each lower connecting rod, an upper connecting rod screw is formed at the lower end of each upper connecting rod, the upper connecting rod screw is screwed to a lower connecting rod screw hole corresponding to the upper end of each lower connecting rod after passing through a through hole predetermined in the motor mounting plate, the upper end of each upper connecting rod extends upward and a manipulator connecting hole is formed in the middle of the end portion, the motor is connected with the motor mounting disc through a group of motor fixing screws, a coupler is arranged between the motor mounting disc and the mounting plate, the upper end of the coupler is in transmission connection with a motor shaft of the motor, and the lower end of the coupler is in transmission connection with the upper end of the driving shaft.

The utility model discloses a in another concrete embodiment, the jack catch dish fix the below at the mounting panel through a set of jack catch dish connecting rod respectively, a jack catch dish connecting rod screw has been seted up respectively in the middle of the upper and lower both ends of jack catch dish connecting rod, the mounting panel be provided with the screw on the jack catch dish respectively in the position department corresponding to jack catch dish connecting rod screw, the screw top-down is connected with jack catch dish connecting rod screw of jack catch dish connecting rod upper end after passing the mounting panel on the jack catch dish, the jack catch dish be provided with screw under the jack catch dish respectively in the position department corresponding to jack catch dish connecting rod screw, the jack catch dish is down up the screw from down be connected with jack catch dish connecting rod screw of jack catch dish connecting rod lower extreme after passing the jack catch dish.

In another specific embodiment of the present invention, the middle portion of the jaw plate is provided with a driving shaft bearing at a position corresponding to the driving shaft, the lower end of the driving shaft is rotatably supported on the driving shaft bearing, the middle portion of the driving shaft is formed with an external thread along the length direction, a central hole of the driving plate is formed with an internal thread formed in a circle to be rotatably fitted with the external thread at a position connected to the driving shaft, and the driving plate slides up and down along the length direction of the driving shaft along with the rotation of the driving shaft.

In another specific embodiment of the present invention, a set of jaw-stepping grooves are respectively formed at intervals on the periphery of the jaw plate at positions corresponding to the installation positions of the jaws, and a pair of jaw-fixing plates are respectively folded and extended at the edges of the two sides of the jaw-stepping groove; the clamping jaws comprise a driving arm, a connecting arm and a jaw body, the middle part of the driving arm is rotationally supported between two corresponding clamping jaw fixing plates through a driving arm middle shaft, the upper end of the driving arm extends upwards after penetrating through the clamping jaw abdicating groove and the end part of the driving arm forms a driving arm upper shaft, the periphery of the driving plate respectively forms a driving plate connecting plate at the position corresponding to each driving arm upper shaft, the driving plate connecting plate is provided with a guide groove running through the thickness direction of the driving plate connecting plate, the driving arm upper shaft is slidably arranged in the corresponding guide groove, and the lower end of the driving arm is hinged with the jaw body through a driving arm lower shaft; the upper end of the connecting arm is rotatably supported between the two corresponding jaw fixing plates through a connecting arm upper shaft, the lower end of the connecting arm is hinged with the jaw body through a connecting arm lower shaft, and a parallelogram structure is formed among the driving arm middle shaft, the driving arm lower shaft, the connecting arm upper shaft and the connecting arm lower shaft.

In yet another embodiment of the present invention, the upper end of the claw body is formed with a pair of claw body mounting plates, and the driving arm and the connecting arm are rotatably supported at positions between the corresponding claw body mounting plates through the driving arm lower shaft and the connecting arm lower shaft, respectively.

In yet another specific embodiment of the present invention, the claw body is formed with a section of anti-slip groove on a side surface facing the clamping direction.

In a more specific embodiment of the present invention, a camera connecting hole is respectively formed on both sides of the CCD camera, and a pair of camera fixing screws are connected to the claw disk after passing through the camera connecting hole from bottom to top, and the CCD camera is fixed at a position near the middle of the lower part of the claw disk.

In yet another specific embodiment of the present invention, a pair of housing fixing blocks are respectively disposed at the edges of the front and rear sides of the mounting plate, and a housing is covered on the mounting plate, and the housing and the two housing fixing blocks are fixed by housing fixing screws.

In yet another specific embodiment of the present invention, the mounting plate is further provided with a weight block at each of the left and right sides of the motor.

The utility model discloses owing to adopt behind the above-mentioned structure, beneficial effect who has: firstly, the structure that the motor directly drives the driving disc to move up and down and the guide groove drives the clamping jaws to open and close is adopted, so that the structure of the mechanical gripper is greatly simplified, the production cost is effectively reduced, the utilization efficiency of the motor is improved, secondly, the CCD camera is adopted to collect image information in real time and carry out edge detection to correct the central coordinate, so that the accuracy of the gripper for gripping a workpiece is ensured, the processing efficiency is improved, and meanwhile, the potential safety hazard is eliminated.

Drawings

Fig. 1 is a schematic perspective view of an embodiment of the present invention.

Fig. 2 is a flow chart of the present invention.

Fig. 3 is a flow chart of the positioning and operation of the present invention.

In the figure: 1. the mounting plate, 11, the balancing weight, 12, a shell fixing block, 13, a shell fixing screw and 14, a shell; 2. the mechanical arm comprises a motor, 21 motor mounting discs, 211 through holes, 22 lower connecting rods, 221 lower connecting rod upper screw holes, 222 lower connecting rod lower screw holes, 223 lower connecting rod screws, 23 upper connecting rods, 231 upper connecting rod screws, 232 manipulator connecting holes, 24 motor fixing screws and 25 motor shafts; 3. the jaw plate comprises a jaw plate body, a jaw plate connecting rod screw hole, a jaw plate upper screw, a jaw plate lower screw, a jaw plate; 4. the driving disc, 41, internal threads, 42, a driving disc connecting plate, 421 and a guide groove; 5. the claw type anti-skid device comprises claws 51, driving arms 511, driving arm middle shafts 512, driving arm upper shafts 513, driving arm lower shafts 52, connecting arms 521, connecting arm upper shafts 522, connecting arm lower shafts 53, claw bodies 531, claw body mounting plates 532 and anti-skid grooves; 6. drive shaft, 61. external thread; 7, CCD camera, 71 camera connecting hole, 72 camera fixing screw; 8. a coupling is provided.

Detailed Description

The following is a detailed description by way of example, but the description of the example is not intended to limit the scope of the present invention, and any equivalent changes made according to the present invention, which are merely formal and insubstantial, should be considered as technical solutions of the present invention.

In the following description, all the concepts related to the directions or orientations of up, down, left, right, front and rear are based on the position shown in fig. 1, and thus should not be construed as particularly limiting the technical solutions provided by the present invention.

Referring to fig. 1, the present invention relates to a mechanical gripper with coaxial visual positioning function, which comprises a mounting plate 1, a motor 2 fixed above the mounting plate 1, a claw disk 3 fixed below the mounting plate 1, a driving disk 4 arranged above the claw disk 3, at least two claws 5 arranged around the claw disk 3 at intervals and in transmission connection with the driving disk 4, and a driving shaft 6 rotatably connected between the motor 2 and the claw disk 3 and in threaded connection with the driving disk 4, wherein the claw disk 3 is provided with at least one CCD camera 7 at the clamping position of the claw disk 5. The number of the claws 5 is preferably three in this embodiment, and they are equally divided by 120 ° around the circumferential direction of the claw disk 3.

Further, the motor 2 is fixed on the mounting plate 1 through a motor mounting plate 21, a set of lower connecting rods 22 are arranged below the motor mounting plate 21 at intervals along the circumferential direction, a lower connecting rod screw hole 221 is respectively formed in the middle of the upper end and the lower end of the lower connecting rod 22, the lower connecting rod screw hole 221 at the lower end of the lower connecting rod 22 is respectively screwed with a lower connecting rod screw 222 penetrating through the mounting plate 1 from bottom to top, an upper connecting rod 23 is respectively arranged above the motor mounting plate 21 at a position corresponding to each lower connecting rod 22, an upper connecting rod screw 231 is respectively formed at the lower end of the upper connecting rod 23, the upper connecting rod screw 231 is screwed with the lower connecting rod screw hole 221 at the upper end of the corresponding lower connecting rod 22 after penetrating through a through hole 211 preset on the motor mounting plate 21, the upper end of the upper connecting rod 23 extends upwards and is respectively provided with a manipulator connecting hole 232 in the middle, the motor 2 is connected with the motor mounting plate 21 through a group of motor fixing screws 24, a coupling 8 is arranged between the motor mounting plate 21 and the mounting plate 1, the upper end of the coupling 8 is in transmission connection with a motor shaft 25 of the motor 2, and the lower end of the coupling is in transmission connection with the upper end of the driving shaft 6.

Further, the jaw plate 3 is fixed below the mounting plate 1 through a set of jaw plate connecting rods 31, a jaw plate connecting rod screw hole 311 is formed in the middle of each of the upper end and the lower end of each jaw plate connecting rod 31, a jaw plate upper screw 312 is arranged at a position corresponding to the jaw plate connecting rod screw hole 311 of the mounting plate 1, the jaw plate upper screw 312 is connected with the jaw plate connecting rod screw hole 311 at the upper end of the jaw plate connecting rod 31 after penetrating through the mounting plate 1 from top to bottom, a jaw plate lower screw 313 is arranged at a position corresponding to the jaw plate connecting rod screw hole 311 of the jaw plate 3, and the jaw plate lower screw 313 is connected with the jaw plate connecting rod screw hole 311 at the lower end of the jaw plate connecting rod 31 after penetrating through the jaw plate 3 from bottom to top.

Further, a driving shaft bearing 32 is provided at a position corresponding to the driving shaft 6 at the middle portion of the chuck plate 3, the lower end of the driving shaft 6 is rotatably supported on the driving shaft bearing 32, an external thread 61 is formed at the middle portion of the driving shaft 6 in the length direction, an internal thread 41 which is rotatably fitted with the external thread 61 is formed at a position connected to the driving shaft 6 in the central shaft hole of the driving plate 4, and the driving plate 4 slides up and down in the length direction of the driving shaft 6 as the driving shaft 6 rotates.

Furthermore, a group of jaw abdicating grooves 33 are respectively formed on the periphery of the jaw disc 3 at intervals at positions corresponding to the installation positions of the jaws 5, and a pair of jaw fixing plates 34 are respectively folded and extended downwards at the two side edges of the jaw abdicating grooves 33; the claw 5 comprises a driving arm 51, a connecting arm 52 and a claw body 53, the middle part of the driving arm 51 is rotatably supported between the two corresponding claw fixing plates 34 through a driving arm middle shaft 511, the upper end of the driving arm 51 extends upwards after passing through the claw abdicating groove 33 and forms a driving arm upper shaft 512 at the end part, the periphery of the driving plate 4 forms a driving plate connecting plate 42 at the position corresponding to each driving arm upper shaft 512 respectively, the driving plate connecting plate 42 is provided with a guide groove 421 penetrating through the thickness direction of the driving plate connecting plate, the driving arm upper shaft 512 is slidably arranged in the corresponding guide groove 421, and the lower end of the driving arm 51 is hinged with the claw body 53 through a driving arm lower shaft 513; the upper end of the connecting arm 52 is rotatably supported between the corresponding two jaw fixing plates 34 through an upper connecting arm shaft 521, the lower end of the connecting arm 52 is hinged to the jaw body 53 through a lower connecting arm shaft 522, and a parallelogram structure is formed among the driving arm center shaft 511, the driving arm lower shaft 513, the upper connecting arm shaft 521 and the lower connecting arm shaft 522.

Further, the claw bodies 53 have a pair of claw body mounting plates 531 at their upper ends, and the driving arms 51 and the connecting arms 52 are rotatably supported by the corresponding claw body mounting plates 531 at positions between the driving arm lower shafts 513 and the connecting arm lower shafts 522, respectively. The claw bodies 53 are each formed with a section of an anti-slip groove 532 on one side facing the clamping direction.

Further, two sides of the CCD camera 7 are respectively provided with a camera connecting hole 71, and a pair of camera fixing screws 72 are connected to the chuck plate 3 after passing through the camera connecting holes 71 from bottom to top, so that the CCD camera 7 is fixed at a position near the middle of the bottom lower portion of the chuck plate 3.

Furthermore, a pair of housing fixing blocks 12 are respectively disposed at the front and rear side edges of the mounting plate 1, a housing 14 covers the mounting plate 1, and the housing 14 and the two housing fixing blocks 12 are respectively connected and fixed by housing fixing screws 13. The mounting plate 1 is further provided with a weight block 11 at each of the left and right sides of the motor 2.

Referring to fig. 1, the mechanical gripper is mounted on the mechanical gripper moving mechanism through the manipulator connecting hole 232 on the upper connecting rod 23, when the motor 2 works, the motor shaft 25 drives the driving shaft 6 to rotate through the coupling 8, the driving disk 4 slides up and down along the driving shaft 6, the driving arm 51 rotates around the driving arm central shaft 511 by the connecting arm upper shaft 521 sliding along the corresponding guiding groove 421 in the moving process of the driving disk 4, and the driving arm central shaft 511, the driving arm lower shaft 513, the connecting arm upper shaft 521 and the connecting arm lower shaft 522 form a parallelogram structure, so that the gripper 53 can be driven to complete the opening and closing action and the anti-slip groove 532 is ensured to face the direction all the time in the rotating process of the driving arm 51.

Referring to fig. 1 in conjunction with fig. 2 and 3, the coaxial positioning process of the present invention is described: when the mechanical gripper needs to grip a workpiece, the mechanical gripper moves to a position above a set workpiece through a mechanical gripper moving module, the CCD camera 7 downwards acquires an image of the target workpiece and transmits the acquired information to an image processing module, the image processing module acquires a central point coordinate of the target workpiece through edge detection and compares the central point coordinate with the set coordinate to acquire a deviation value, the deviation signal is transmitted to the mechanical gripper moving module, the mechanical gripper moving module corrects the coordinate position of the mechanical gripper according to the deviation value, then a motor driving module works, the motor 2 rotates forwards to enable the clamping jaws 5 to be closed and grip the target workpiece, then the mechanical gripper moving module moves the mechanical gripper to a specified position, finally the motor driving module works again, the motor 2 rotates backwards to enable the clamping jaws 5 to release the target workpiece, and after releasing action is completed, and the mechanical gripper moving module resets and moves the mechanical gripper to a position above another target workpiece, and then the processes are repeated, so that the coaxial visual positioning function of the mechanical gripper is realized.

Claims (10)

1. A mechanical gripper with coaxial visual positioning function is characterized in that: including a mounting panel (1), one fix motor (2) in mounting panel (1) top, one fix claw dish (3) in mounting panel (1) below, one set up driving-disc (4) in claw dish (3) top, at least two set up and with driving-disc (4) transmission claw (5) of being connected around claw dish (3) interval and one rotationally connect between motor (2) and claw dish (3) and with driving-disc (4) threaded connection's drive shaft (6), claw dish (3) be provided with an at least CCD camera (7) in the clamping position department of claw (5).

2. The mechanical gripper with the coaxial visual positioning function according to claim 1, wherein the motor (2) is fixed on the mounting plate (1) through a motor mounting plate (21), a set of lower connecting rods (22) are arranged below the motor mounting plate (21) at intervals along the circumferential direction, a lower connecting rod screw hole (221) is respectively formed in the middle of the upper end and the lower end of each lower connecting rod (22), the lower connecting rod screw hole (221) at the lower end of each lower connecting rod (22) is respectively in threaded connection with a lower connecting rod screw (222) penetrating through the mounting plate (1) from bottom to top, an upper connecting rod (23) is respectively arranged above the motor mounting plate (21) at a position corresponding to each lower connecting rod (22), an upper connecting rod screw (231) is respectively formed at the lower end of each upper connecting rod (23), and the upper connecting rod screw (231) corresponds to the lower connecting rod screw (231) after penetrating through a through hole (211) preset in the motor mounting plate (21) Lower connecting rod screw (221) spiro union of connecting rod (22) upper end, the upper end of going up connecting rod (23) upwards extends and has seted up a manipulator connecting hole (232) respectively in the middle of the tip, motor (2) be connected with motor mounting disc (21) through a set of motor set screw (24) respectively be provided with a shaft coupling (8) between motor mounting disc (21) and mounting panel (1), the upper end of this shaft coupling (8) is connected with motor shaft (25) transmission of motor (2), the upper end transmission of lower extreme and drive shaft (6) is connected.

3. The mechanical gripper with coaxial visual positioning function according to claim 1, wherein the gripper disc (3) is fixed below the mounting plate (1) through a set of gripper disc connecting rods (31), a gripper disc connecting rod screw hole (311) is formed in the middle of the upper end and the lower end of the gripper disc connecting rod (31), a gripper disc upper screw (312) is arranged at the position corresponding to the gripper disc connecting rod screw hole (311) of the mounting plate (1), the gripper disc upper screw (312) is connected with the gripper disc connecting rod screw hole (311) at the upper end of the gripper disc connecting rod (31) from top to bottom after passing through the mounting plate (1), a gripper disc lower screw (313) is arranged at the position corresponding to the gripper disc connecting rod screw hole (311) of the gripper disc (3), and the gripper disc lower screw (313) is connected with the gripper disc connecting rod screw hole (311) at the lower end of the gripper disc connecting rod (31) from bottom to top after passing through the gripper disc (3) The disk connecting rod screw holes (311) are connected.

4. A mechanical gripper with coaxial visual positioning function according to claim 1, wherein the central portion of the gripper disc (3) is provided with a driving shaft bearing (32) at a position corresponding to the driving shaft (6), the lower end of the driving shaft (6) is rotatably supported on the driving shaft bearing (32), the central portion of the driving shaft (6) is formed with a section of external thread (61) along the length direction, the central axial hole of the driving disc (4) is formed with a circle of internal thread (41) which is rotatably matched with the external thread (61) at a position connected with the driving shaft (6), and the driving disc (4) slides up and down along the length direction of the driving shaft (6) along with the rotation of the driving shaft (6).

5. The mechanical gripper with the coaxial visual positioning function according to claim 1, characterized in that a set of gripper abdicating grooves (33) are respectively formed in the periphery of the gripper disc (3) at intervals at the positions corresponding to the mounting positions of the grippers (5), and a pair of gripper fixing plates (34) are respectively folded and extended downward at the two side edges of the gripper abdicating grooves (33); the claw (5) comprises a driving arm (51), a connecting arm (52) and a claw body (53), the middle part of the driving arm (51) is rotationally supported between the two corresponding claw fixing plates (34) through a driving arm central shaft (511), the upper end of the driving arm (51) extends upwards after passing through the jaw abdicating groove (33) and forms a driving arm upper shaft (512) at the end part, the periphery of the driving disk (4) is respectively provided with a driving disk connecting plate (42) at the position corresponding to the upper shaft (512) of each driving arm, a guide groove (421) running through the thickness direction of the driving disk connecting plate (42) is arranged on the driving disk connecting plate, the upper shaft (512) of the driving arm is arranged in the corresponding guide groove (421) in a sliding way, the lower end of the driving arm (51) is hinged with the claw body (53) through a driving arm lower shaft (513); the upper end of the connecting arm (52) is rotatably supported between the two corresponding jaw fixing plates (34) through a connecting arm upper shaft (521), the lower end of the connecting arm (52) is hinged with the jaw body (53) through a connecting arm lower shaft (522), and a parallelogram structure is formed among the driving arm middle shaft (511), the driving arm lower shaft (513), the connecting arm upper shaft (521) and the connecting arm lower shaft (522).

6. A mechanical gripper with coaxial visual orientation function as claimed in claim 5, wherein said claw body (53) is formed with a pair of claw body mounting plates (531) at the upper end, and said driving arm (51) and said connecting arm (52) are rotatably supported at the position between the corresponding claw body mounting plates (531) by a driving arm lower shaft (513) and a connecting arm lower shaft (522), respectively.

7. A mechanical gripper with coaxial visual orientation function as claimed in claim 5, characterized in that said claw bodies (53) are respectively formed with a segment of anti-slip groove (532) on one side facing the clamping direction.

8. The mechanical gripper with the coaxial visual positioning function according to claim 1, wherein two sides of the CCD camera (7) are respectively provided with a camera connecting hole (71), and a pair of camera fixing screws (72) are connected with the jaw plate (3) from bottom to top after passing through the camera connecting holes (71), so that the CCD camera (7) is fixed at a position near the middle below the bottom of the jaw plate (3).

9. The mechanical gripper with the coaxial visual positioning function according to claim 1, wherein a pair of housing fixing blocks (12) are respectively arranged at the front and rear side edges of the mounting plate (1), a housing (14) is covered above the mounting plate (1), and the housing (14) and the two housing fixing blocks (12) are respectively connected and fixed through housing fixing screws (13).

10. The mechanical gripper with coaxial visual positioning function according to claim 1, wherein the mounting plate (1) is further provided with a weight block (11) at each of the left and right sides of the motor (2).

Images