CN216759885U - General automatically controlled gripper of long-life - Google Patents
General automatically controlled gripper of long-life Download PDFInfo
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- CN216759885U CN216759885U CN202220206751.9U CN202220206751U CN216759885U CN 216759885 U CN216759885 U CN 216759885U CN 202220206751 U CN202220206751 U CN 202220206751U CN 216759885 U CN216759885 U CN 216759885U
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Abstract
The utility model discloses a general electric control mechanical claw with long service life, which comprises a shell, a speed reducing motor, a screw pair, a motor driving plate, a signal wire and two clamping jaws, wherein the shell is provided with a plurality of clamping jaws; the screw pair comprises a screw and a screw nut, the screw is coaxially connected with an output shaft of the speed reducing motor, the screw nut comprises a nut body and two connecting parts, each connecting part is provided with a circular pin shaft, and each circular pin shaft is respectively connected with one clamping jaw; for each clamping jaw, the clamping jaw comprises a U-shaped connecting rod and a knuckle, the U-shaped connecting rod is fixedly connected with the lower end of the knuckle, an opening of the U-shaped connecting rod is inserted into the circular pin shaft so that the U-shaped connecting rod can move and rotate relative to the circular pin shaft under the driving of the circular pin shaft, the upper end of the U-shaped connecting rod is rotatably installed on the shell through a hinge shaft, and the hinge shaft and the circular pin shaft are parallel to each other. The utility model has high transmission precision, long service life and smooth opening and closing of the mechanical claw, and prolongs the service life of the whole structure of the mechanical claw.
Description
Technical Field
The utility model belongs to the field of mechanical claws, and particularly relates to a universal electric control mechanical claw with a long service life.
Background
As is well known, robots and equipment play more and more roles in helping human beings to produce and live, along with the development of science and technology, the types of robots and the industries used in the robots are more and more, and in the industries of mechanical manufacturing, metallurgy, electronics, light industry and the like, a lot of robots are used for replacing heavy labor of human beings.
The mechanical claw is an indispensable component on the robot manipulator, is used for clamping and transporting objects frequently, and has the advantages of convenience in use, simple structure and good adaptability.
Most of the existing mechanical claws on the market are special mechanical claws, and the designed special mechanical claws have the defects of complex structure, complex driving mode, easy failure and short service life and can grab parts and articles according to different shapes and sizes; in addition, it is generally only used for grasping a fixed part or object, and is not universal.
In addition, when the existing clamping jaw clamps an object, whether the object can be clamped or not is judged only by means of artificial experience without damaging the object, a quantitative judgment basis is not provided, artificial subjective judgment is not accurate, errors are large, and the situation that the object cannot be clamped or the object is damaged due to overlarge clamping force easily occurs.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects or improvement requirements of the prior art, the utility model provides the universal electric control mechanical claw with long service life, the transmission precision of the universal electric control mechanical claw is high, the service life is long, the mechanical claw is smoothly opened and closed, and the service life of the whole structure of the mechanical claw is prolonged.
In order to achieve the above object, according to one aspect of the present invention, there is provided a universal electrically-controlled gripper with a long service life, comprising a housing, a reduction motor, a screw pair, a motor driving plate, a signal line, and two gripping jaws, wherein:
the speed reducing motor and the driving plate are both positioned in the shell and are both installed on the shell, the motor driving plate is connected with the speed reducing motor, one end of the signal wire is connected with the motor driving plate, the other end of the signal wire is exposed out of the shell, and an output shaft of the speed reducing motor is arranged upwards;
the screw pair comprises a screw and a screw nut which is arranged on the screw in a penetrating way, the screw is coaxially connected with an output shaft of the speed reducing motor, the screw nut comprises a nut body which is arranged on the screw in a penetrating way and two connecting parts which are fixedly arranged on the nut body, each connecting part is provided with a horizontal round pin shaft, and each round pin shaft is respectively connected with one clamping jaw;
for each clamping jaw, the clamping jaw comprises a U-shaped connecting rod and a knuckle, the U-shaped connecting rod is fixedly connected with the lower end of the knuckle, an opening of the U-shaped connecting rod is inserted into the circular pin shaft so that the U-shaped connecting rod can move and rotate relative to the circular pin shaft under the driving of the circular pin shaft, the upper end of the U-shaped connecting rod is rotatably installed on the shell through a hinge shaft, and the hinge shaft and the circular pin shaft are parallel to each other.
Preferably, a vertical tunnel for guiding up and down movement of the nut is provided in the cabinet.
Preferably, the casing includes a housing, a side upper cover and a side lower cover, which are respectively covered on an upper portion and a lower portion of the housing.
Preferably, the hinge shaft is rotatably mounted on the housing by a ball bearing.
Preferably, a wire protecting sleeve is sleeved on the signal wire, one end of the wire protecting sleeve extends into the casing, and the other end of the wire protecting sleeve is connected with the casing in a sealing mode.
Preferably, each clamping jaw is provided with a mounting hole for mounting clamping fingers with different shapes.
In general, compared with the prior art, the above technical solution contemplated by the present invention can achieve the following beneficial effects:
1) the utility model provides a general electric mechanical claw with long service life, which adopts a speed reducing motor to drive and replace the traditional cylinder driving mode, does not need an extra air compressor and can be applied to any electrified place; and compare the cylinder drive, motor drive noise is little, accords with the environmental protection requirement more. A motor driving plate is fixed behind the motor and can be adjusted and controlled according to feedback data, so that the mechanical claw is stable in opening and closing and quick in response.
2) The mechanical claw is provided with a mounting hole, so that different claws can be used according to different shapes of articles without disassembling the whole mechanical arm.
3) The transmission structure adopts the mutual matching of the screw nut and the screw, the mechanical claw obtains the self-locking function, the motor of the speed reduction motor can be protected, the vertical tunnel for the movement of the screw nut is increased, the screw nut can slide more uniformly, the opening and closing of the mechanical claw are smoother, and the service life of the overall structure of the mechanical claw is prolonged.
4) The utility model can adopt the following steps according to the environment and the precision requirement required by the user: the brush motor, the hollow cup motor, the stepping motor, the brushless motor or the servo motor and other different motors are suitable for robot arms in various industries, and the robot arm has strong universality and is convenient to detach, replace, install and debug.
5) The utility model can judge whether the mechanical claw can damage the article before clamping the article, and has high safety and reliability.
Drawings
FIG. 1 is a front view of the present invention;
FIG. 2 is a perspective view of the housing of the present invention with a portion removed;
FIG. 3 is a front view of the housing of the present invention with a portion removed;
FIG. 4 is a perspective view of the present invention;
FIG. 5 is a schematic view of the gripper of the present invention from open to closed;
FIG. 6 is a schematic view of the gripper of the present invention from closed to open;
FIG. 7 is a force analysis diagram of the U-shaped linkage and gripper of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Referring to fig. 1 to 6, a general electric control gripper with long service life comprises a casing, a speed reducing motor, a screw pair, a motor driving plate 14, a signal wire 5 and two clamping jaws, wherein:
the speed reducing motor and the driving plate are both positioned in the shell and are both installed on the shell, the motor driving plate 14 is connected with the speed reducing motor, one end of the signal wire 5 is connected with the motor driving plate 14, the other end of the signal wire is exposed out of the shell, and an output shaft of the speed reducing motor is arranged upwards;
the screw pair comprises a screw 9 and a screw nut 8 which is arranged on the screw 9 in a penetrating manner, the screw 9 is coaxially connected with an output shaft of the speed reducing motor, the screw nut 8 comprises a nut body which is arranged on the screw 9 in a penetrating manner and two connecting parts which are fixedly arranged on the nut body, each connecting part is provided with a horizontal round pin shaft 17, and each round pin shaft 17 is respectively connected with one clamping jaw;
for each clamping jaw, the clamping jaw comprises a U-shaped connecting rod 7 and a knuckle 1, the U-shaped connecting rod 7 is fixedly connected with the lower end of the knuckle 1, the U-shaped connecting rod 7 and the knuckle 1 are preferably integrally formed, an opening of the U-shaped connecting rod 7 is forked into the circular pin shaft 17, so that the U-shaped connecting rod 7 moves and rotates relative to the circular pin shaft 17 under the driving of the circular pin shaft 17, the upper end of the U-shaped connecting rod 7 is rotatably installed on the machine shell through a hinge shaft 18, and the hinge shaft 18 and the circular pin shaft 17 are parallel to each other. The hinge shaft 18 comprises a rotating shaft and a bearing, the rotating shaft is rotatably arranged on the machine shell through the bearing, and the U-shaped connecting rod 7 and the knuckle 1 are fixedly connected with the rotating shaft. The rotary shaft is connected with an encoder, so that the position of the clamping jaw can be known.
Further, a vertical tunnel 10 for guiding the up-and-down movement of the screw nut 8 is provided in the housing. The vertical tunnel 10 serves to constrain the lead screw nut 8 from sliding within its orientation, reducing deflection and wear.
Further, the machine shell comprises a shell 16, a side upper cover 2 and a side lower cover 3, wherein the side upper cover 2 and the side lower cover 3 cover the upper part and the lower part of the shell 16 respectively, and the whole machine shell plays a role in protecting internal parts.
Further, the hinge shaft 18 is rotatably mounted on the housing through a ball bearing 15, so that the clamping jaws can smoothly rotate, the assembly difficulty can be reduced, and the clamping jaws can rotate around the central line of the pin shaft by being pushed by the screw nut 8 to form an opening and closing structure for grabbing articles.
Furthermore, a wire protecting sleeve 4 is sleeved on the signal wire 5, one end of the wire protecting sleeve 4 extends into the shell, the end of the wire protecting sleeve is connected with the shell in a sealing mode, and the wire protecting sleeve 4 can prevent dust and the like from entering the shell and plays a certain protection role.
Further, each clamping jaw is provided with a mounting hole 6 for mounting clamping fingers with different shapes.
Referring to fig. 7, according to another aspect of the present invention, there is provided the method for determining whether an article is gripped by the high-precision electromechanical gripper, including the steps of:
1) in the stress analysis, the knuckle 1 and the U-shaped connecting rod 7 are simplified into straight rods;
let T be the output torque of the reduction motor, the vertical force F received by the contact portion of the U-shaped connecting rod 7 and the circular pin 17 is analyzed as follows:
obtaining F ═ T/((D/2) × tan (α + β));
wherein F is equal to the vertical push-pull force of the linear motion of the screw nut 9, D is the pitch diameter of the screw thread of the screw rod 10, alpha is the lead angle of the screw rod 10 and alpha is tan-1(Ld/πD)，LdThe pitch of the thread of the screw 10; beta is the equivalent friction angle and beta is tan-1f is the equivalent friction coefficient of a screw pair consisting of the screw 10 and the screw nut 9, and is determined by referring to materials, design and processing parameters;
2) the vertical force F applied to the contact part of the U-shaped connecting rod 7 and the round pin shaft 17 is decomposed into F1And F2Two perpendicular forces of which F1Is directed perpendicularly to the U-shaped connecting rod 7, F2In a direction parallel to the U-shaped link 7, F1Force for dragging the U-shaped link 7 into rotation, F1Rho is F1The included angle between the two surfaces F;
the upper end of the knuckle 1 is also subjected to a force F1And a force F of the upper end of the knuckle 11The force F received by the first link 81Opposite, opposing force F1At the upper end of the knuckle 1 is broken down into FdAnd Fm，FdPerpendicular to the knuckles 1, FmParallel to the knuckles 1, FdForce for dragging rotation of knuckle 1, and Fd＝F1θ is FdAnd F1The included angle therebetween;
theta is a dynamic angle, and is changed along with the rotation of the knuckle 1, and theta is definediAnd FiAngle theta at the moment of starting the knuckle 1 and corresponding holding force thetazAnd FzThe angle θ at the moment when the knuckle 1 stops and the corresponding gripping force are as follows:
Fi＝F1*cosθi；Fz＝F1*cosθz；
4)
rho is determined or measured according to the size of the clamping jaw, and after the speed reducing motor is selected, the holding force F is obtainediAnd FzAccording to FiAnd FzAnd judging the property and the bearing capacity of the article before the two clamping jaws clamp the article, and judging whether the clamping jaws can clamp the article or not, thereby ensuring that the article cannot be damaged.
Fig. 4-6 show the force applied when the jaws are closed, with force F directed vertically downward.
During the ascending and descending of the screw rod 9, the directions of the upper forces are opposite.
The speed reducing motor comprises a motor 12 and a speed reducing box 11 connected with a motor shaft of the motor 12, wherein the speed reducing box 11 can increase the output of the motor 12 and reduce the rotating speed, so that the clamping capacity of a clamping jaw is increased, and the operation is slow and stable. The motor drive plate 14 is mounted on the mounting plate 13, and the mounting plate 13 is fixed to the housing 16 by screws. The shell 16 is provided with a wire outlet hole, the signal wire 5 is sleeved on the wire sheath 4 and extends out of the wire outlet hole, and the signal wire can be driven and debugged by an external power supply or a signal generator.
The working process of the utility model is as follows:
the signal line 5 is according to external power supply, switch on for motor 12 through motor drive board 14, drive motor 12 and just reverse, if lead screw 9 is the right-handed screw, when motor 12 reversal (CCW), drive the play axle reversal of gear box, thereby drive lead screw 9 counter-clockwise turning, lead screw 9 counter-clockwise turning can drive the screw nut 8 of meshing outside and carry out the downstream in vertical tunnel 10, can give 7 decurrent pulling forces of U-shaped connecting rod in the time of screw nut 8 downstream, thereby drive 7 opposite rotations of U-shaped connecting rod around round pin axle 17, the opposite rotation of U-shaped connecting rod 7 drives a pair of clamping jaw opposite rotation, and then press from both sides and get article.
After the clamping jaws clamp an object, the motor drive plate 14 feeds back power-off processing according to quantized data of the motor 12, and because a helix angle is smaller than an equivalent friction angle between tooth surfaces, the helical transmission has a self-locking function, so that the screw nut 8 can be stationary at the current position, the U-shaped connecting rod 7 arranged on the screw nut 8 through the circular pin shaft 17 can also be stationary at the current position, and the pair of clamping jaws are guaranteed to be in a stationary state, namely, the clamping jaws can stably and reliably clamp the object without falling even after the motor 12 is powered off. When the clamping jaws clamp an article to a designated place or position, according to the information of an external power supply or a signal generator, the motor 12 rotates forwards (CW), further the reduction gearbox 11 is driven to rotate forwards, the screw 9 is also driven to rotate clockwise, when the screw 9 rotates clockwise, the screw nut 8 meshed with the screw nut can move upwards in the vertical tunnel 10, the screw nut 8 moves upwards to provide an upward thrust for the U-shaped connecting rods 7 installed on the screw nut 8 according to the circular pin shaft 17, the thrust can enable the two U-shaped connecting rods 7 to rotate backwards around the circular pin shaft 17, so that a pair of clamping jaws are driven to rotate backwards, and the clamping jaws are separated to put down the article.
If the screw 9 is a left-hand thread (normally a right-hand thread, and a left-hand thread is used only if the right-hand thread is not satisfied), the lifting and lowering of the screw nut 8 is reversed.
It will be understood by those skilled in the art that the foregoing is only an exemplary embodiment of the present invention, and is not intended to limit the utility model to the particular forms disclosed, since various modifications, substitutions and improvements within the spirit and scope of the utility model are possible and within the scope of the appended claims.
Claims (6)
1. The utility model provides a general automatically controlled gripper of high life, its characterized in that includes casing, gear motor, lead screw pair, motor drive board, signal line and two clamping jaws, wherein:
the speed reduction motor and the drive plate are both positioned in the shell and are both arranged on the shell, the motor drive plate is connected with the speed reduction motor, one end of the signal wire is connected with the motor drive plate, the other end of the signal wire is exposed out of the shell, and an output shaft of the speed reduction motor is arranged upwards;
the screw pair comprises a screw and a screw nut which is arranged on the screw in a penetrating way, the screw is coaxially connected with an output shaft of the speed reducing motor, the screw nut comprises a nut body which is arranged on the screw in a penetrating way and two connecting parts which are fixedly arranged on the nut body, each connecting part is provided with a horizontal round pin shaft, and each round pin shaft is respectively connected with one clamping jaw;
for each clamping jaw, the clamping jaw comprises a U-shaped connecting rod and a knuckle, the U-shaped connecting rod is fixedly connected with the lower end of the knuckle, an opening of the U-shaped connecting rod is forked into the circular pin shaft, the upper end of the U-shaped connecting rod is rotatably installed on the shell through a hinge shaft, and the hinge shaft and the circular pin shaft are parallel to each other.
2. A long-life universal electrically controlled mechanical gripper according to claim 1, characterized in that a vertical tunnel for guiding the up and down movement of the nut is provided in the housing.
3. The long-life universal electrically controlled mechanical gripper as claimed in claim 1, wherein said housing comprises a housing, a side upper cover and a side lower cover, said side upper cover and said side lower cover are respectively covered on the upper portion and the lower portion of said housing.
4. A universal electrically operated gripper according to claim 1 and having a long life wherein said hinge shaft is rotatably mounted to said housing by ball bearings.
5. The long-life universal electrically-controlled mechanical claw is characterized in that a wire protecting sleeve is sleeved on the signal wire, one end of the wire protecting sleeve extends into the shell, and the end of the wire protecting sleeve is connected with the shell in a sealing mode.
6. A universal electrically controlled mechanical gripper for long service life according to claim 1 and further characterized in that each of said gripping jaws is provided with mounting holes for mounting gripping fingers of different shapes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220206751.9U CN216759885U (en) | 2022-01-25 | 2022-01-25 | General automatically controlled gripper of long-life |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220206751.9U CN216759885U (en) | 2022-01-25 | 2022-01-25 | General automatically controlled gripper of long-life |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216759885U true CN216759885U (en) | 2022-06-17 |
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ID=81979752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220206751.9U Active CN216759885U (en) | 2022-01-25 | 2022-01-25 | General automatically controlled gripper of long-life |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216759885U (en) |
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2022
- 2022-01-25 CN CN202220206751.9U patent/CN216759885U/en active Active
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