CN216859769U - Large-stroke electric clamping jaw - Google Patents

Abstract

The application provides a large-stroke electric clamping jaw, which comprises a supporting seat, a pair of clamping components and a driving component, the supporting seat comprises a supporting part located between the pair of clamping components, the driving component comprises a motor, a nut and a pushing part, a rotor shaft of the motor is provided with an extending part, the extending part extends into the supporting seat, one end, far away from a rotor of the motor, of the extending part penetrates through the pushing part and then is connected to the supporting part in a rotating mode, the nut is connected to the extending part in a threaded mode, the pushing part is sleeved on the nut, and the pushing part is hinged to the pair of clamping components. The application provides a big stroke electric clamping jaw has adopted the rotor shaft of motor and nut to constitute screw nut pair, has avoided rotor shaft and the problem that lead screw connection is difficult to ensure the concentricity among the correlation technique, and because the both ends of extension support respectively on rotor and supporting part, make the impeller that is driven by the nut be difficult to take place to rock at the removal in-process, thereby solved the concentricity of rotor shaft and lead screw poor, the impeller is at the problem of removal in-process poor stability.

Description

Large-stroke electric clamping jaw

Technical Field

The application belongs to the technical field of automated production equipment, and more specifically relates to a large-stroke electric clamping jaw.

Background

With the continuous development of production technology, the requirement on the automation degree of production and processing is higher and higher, and the electric clamping jaw is more and more widely applied to the production and processing. The electric clamping jaw is an automatic device which is driven by a motor or a cylinder and the like to drive the clamping jaw to clamp materials.

At present, large-stroke electric clamping jaws in the market, such as the large-stroke electric clamping jaws disclosed in the invention application with the application number of 201910252224.4, are difficult to ensure the concentricity of a rotor shaft and a lead screw because the rotor shaft and the lead screw need to be connected through a fastener, and because a pushing piece for driving the clamping jaws to open and close is only supported by a single side, the pushing piece is easy to shake in the moving process, so that the stability of the clamping jaws in the opening and closing process is reduced.

SUMMERY OF THE UTILITY MODEL

The application aims to provide a large-stroke electric clamping jaw, which comprises but is not limited to solving the technical problems of poor concentricity of a rotor shaft and a lead screw and poor stability of a pushing piece in the moving process.

In order to achieve the above object, the present application provides a large-stroke electric clamping jaw, which includes a supporting seat, a pair of clamping assemblies and a driving assembly, wherein the pair of clamping assemblies are oppositely disposed and rotatably connected to the supporting seat, the driving assembly is installed at one end of the supporting seat away from the pair of clamping assemblies, the supporting seat includes a supporting portion located between the pair of clamping assemblies, the driving assembly includes a motor, a nut and a pushing member, a rotor shaft of the motor has an extending portion, the extending portion extends into the supporting seat, one end of the extending portion away from a rotor of the motor passes through the pushing member and is rotatably connected to the supporting portion, the extending portion is provided with a thread, the nut is in threaded connection with the extending portion, the pushing member is sleeved on the nut and is respectively hinged to the pair of clamping assemblies, can drive a pair of the clamping components to open and close.

In some embodiments, at least one inner wall of the support seat is provided with a guide groove, and the length direction of the guide groove is parallel to the axial direction of the rotor shaft; and the side wall of the pushing part is provided with a limiting bulge, and the limiting bulge extends into the guide groove to form sliding connection.

In some embodiments, the clamping assembly includes a clamping finger, a first link and a second link, one end of the first link and one end of the second link are respectively and rotatably connected to the supporting seat, the other end of the first link and the other end of the second link are respectively and rotatably connected to the clamping finger, and one end of the second link connected to the supporting seat is further hinged to the pushing member.

In some embodiments, a first connecting portion is provided at one end of the second connecting rod connected to the supporting seat, a second connecting portion is provided at the pushing member, and the driving assembly further includes a connecting member, wherein two ends of the connecting member are respectively hinged to the first connecting portion and the second connecting portion.

In some embodiments, the connecting member is an i-shaped member, and the first connecting portion and the second connecting portion respectively extend into two grooves of the i-shaped member and are hinged to the i-shaped member by a first connecting pin.

In some embodiments, the pair of clamping assemblies are symmetrically arranged, and the moving direction of the pushing piece is positioned on the included angle median line of the pair of clamping assemblies.

In some embodiments, a bearing is provided on the support portion, and an end of the protruding portion away from the rotor is inserted into the bearing.

In some embodiments, the supporting seat includes a first seat body and a second seat body, the first seat body and the second seat body are arranged oppositely and are spliced to form a mounting cavity and an avoiding opening, a first mounting hole is formed in a wall of the first seat body far away from the avoiding opening, and the first mounting hole and the avoiding opening are respectively communicated with the mounting cavity; and two ends of the supporting part are respectively and fixedly connected to the inner wall of the first seat body and the inner wall of the second seat body.

In some embodiments, the large-stroke electric clamping jaw further comprises a control assembly, the control assembly is mounted on one side of the motor, which is far away from the pushing part, and the control assembly comprises a main control circuit board and an encoder, and the circuit board of the encoder is arranged opposite to the main control circuit board and is respectively perpendicular to the rotor shaft.

In some embodiments, the encoder comprises a magnet fixedly attached to an end of the rotor shaft remote from the support base; the middle part of master control circuit board has been seted up and has been dodged the hole, the rotor shaft is kept away from the one end of supporting seat passes dodge the hole, magnet with the circuit board clearance fit of encoder.

The application provides a large-stroke electric clamping jaw's beneficial effect: the screw thread is arranged on the extending part of the rotor shaft of the motor to serve as the lead screw, the lead screw nut pair is formed by the lead screw and the nut, the problem that the concentricity of the rotor shaft and the lead screw is difficult to ensure in the related technology is avoided, and because the two ends of the extending part are respectively supported on the rotor and the supporting part, double-side supporting is realized, so that the pushing part driven by the nut is difficult to shake in the moving process, the technical problems that the concentricity of the rotor shaft and the lead screw is poor and the stability of the pushing part is poor in the moving process are effectively solved, and the stability of the large-stroke electric clamping jaw in the operating process is favorably improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is a schematic perspective view of a large-stroke electric clamping jaw provided in an embodiment of the present application;

FIG. 2 is a schematic longitudinal cross-sectional view of a large-stroke electric clamping jaw provided in an embodiment of the present application;

fig. 3 is an exploded perspective view of a large-stroke electric clamping jaw provided in an embodiment of the present application.

Wherein, in the figures, the respective reference numerals:

1-large stroke electric clamping jaw;

10-a support seat, 11-a first seat body, 12-a second seat body, 13-a support part, 14-a bearing, 101-an installation cavity, 102-an avoidance opening, 103-a guide groove and 110-a first installation hole;

20-clamping component, 21-clamping finger, 22-first connecting rod, 23-second connecting rod, 24-second connecting pin, 25-third connecting pin, 211-third mounting hole, 212-fourth mounting hole, 221-fifth mounting hole, 222-sixth mounting hole, 231-seventh mounting hole, 232-eighth mounting hole and 233-first connecting part;

30-drive assembly, 31-motor, 32-nut, 33-pushing piece, 34-connecting piece, 35-first connecting pin, 311-rotor shaft, 312-rotor, 330-second mounting hole, 331-second connecting part, 332-limiting projection, 340-groove, 3110-protruding part;

40-control assembly, 41-main control circuit board, 42-circuit board of encoder, 43-magnet, 410-avoidance hole;

50-shell, 51-shell, 52-cover.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in 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 present application and are not intended to limit the present application.

It should be noted that: when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly connected to the other element. When an element is referred to as being "connected" to another element, it can be directly or indirectly connected to the other element. When a component is referred to as being "electrically connected" to another component, it can be electrically connected by conductors, or can be electrically connected by radios, or can be connected by various other means capable of carrying electrical signals. The terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience of description only and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated in a particular orientation, and therefore are not to be construed as limiting the patent, the particular meaning of which terms will be understood by those skilled in the art as appropriate. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. The term "plurality" means two or more unless specifically limited otherwise.

Referring to fig. 1 to 3 together, the present application provides a large-stroke electric clamping jaw 1, the large-stroke electric clamping jaw 1 includes a supporting base 10, a pair of clamping assemblies 20 and a driving assembly 30, the pair of clamping assemblies 20 are disposed opposite to each other and are respectively rotatably connected to the supporting base 10, the driving assembly 30 is mounted at an end of the supporting base 10 away from the pair of clamping assemblies 20, wherein the supporting base 10 includes a supporting portion 13 located between the pair of clamping assemblies 20, i.e. the supporting portion 13 is located at a space between the pair of clamping assemblies 20, the driving assembly 30 includes a motor 31, a nut 32 and a pushing member 33, a rotor shaft 311 of the motor 31 has an extending portion 3110, the extending portion 3110 extends into the supporting base 10, an end of the extending portion 3110 away from a rotor 312 of the motor 31 passes through the pushing member 33 and is rotatably connected to the supporting portion 13, and the extending portion 3110 is threaded, i.e. an outer wall of the extending portion 3110 is externally threaded, the nut 32 is screwed on the protrusion 3110, and the pushing member 33 is sleeved on the nut 32 and is hinged to the pair of clamping assemblies 20 respectively, so as to drive the pair of clamping assemblies 20 to open or close.

Specifically, a pair of clamping assemblies (i.e. clamping jaws) 20 are respectively arranged at two sides of the supporting seat 10, the protruding portion 3110, the nut 32 and the pushing member 33 of the rotor shaft 311 are respectively accommodated at a space between the pair of clamping assemblies 20, an internal thread of the nut 32 is meshed with an external thread of the protruding portion 3110, the nut 32 and the rotor shaft 311 (which function as both the rotor shaft and the lead screw) form a lead screw-nut pair, the pushing member 33 is provided with a second mounting hole 330, the second mounting hole 330 penetrates through the pushing member 33, the pushing member 33 is sleeved on the nut 32 through the second mounting hole 330, so that the pushing member 33 can move linearly along the protruding portion 3110 in a reciprocating manner along with the nut 32, and one end of the protruding portion 3110, which is far away from the rotor 312, passes through an inner hole of the nut 32 and the second mounting hole 330 of the pushing member 33 and then is rotatably connected with the supporting portion 13. In practical applications, when the motor 31 is started, the rotor shaft 311 is driven to rotate around the axis thereof, and when the rotor shaft 311 rotates, the nut 32 and the pushing member 33 are driven to move linearly and reciprocally along the protrusion 3110, and at the same time, the pushing member 33 pushes or pulls the pair of clamping assemblies 20 to open or close.

The application provides an electronic clamping jaw 1 of big stroke, the adoption sets up the screw on the extension 3110 of the rotor shaft 311 of motor 31 as the lead screw, constitute screw-nut pair with nut 32, rotor shaft and lead screw connection are difficult to ensure the problem of concentricity among the correlation technique, and because the both ends of extension 3110 support respectively on rotor 312 and supporting part 13, two side support has been realized, make impeller 33 that is driven by nut 32 be difficult to take place to rock at the removal in-process, thereby it is poor with the concentricity of lead screw to have solved rotor shaft effectively, impeller is at the technical problem of removal in-process poor stability, be favorable to promoting the stability of electronic clamping jaw 1 of big stroke at the operation in-process.

Optionally, referring to fig. 3, as a specific embodiment of the large-stroke electric clamping jaw provided in the present application, a guide groove 103 is formed on at least one inner wall of the supporting seat 10, and a length direction of the guide groove 103 is parallel to an axial direction of the rotor shaft 311; meanwhile, a limit protrusion 332 is arranged on the side wall of the pushing member 33, and the limit protrusion 332 extends into the guide groove 103 to form a sliding connection. Specifically, the supporting seat 10 has two inner walls arranged oppositely, the pushing element 33 is located between the two inner walls arranged oppositely of the supporting seat 10, a limiting protrusion 332 is formed on a side wall of the pushing element 33 facing the inner wall of the supporting seat 10, the position of the limiting protrusion 332 corresponds to the position of the guiding groove 103, and the limiting protrusion 332 is in sliding connection with the inner wall of the supporting seat 10 after extending into the guiding groove 103. Therefore, in the operation process of the large-stroke electric clamping jaw 1, the pushing piece 33 can make reciprocating linear movement along the guide groove 103 in the axial direction of the rotor shaft 311 under the driving of the nut 32, and even if the limitation of the clamping assembly 20 is not provided, the pushing piece 33 cannot rotate around the protruding part 3110 in the linear movement process, so that the stability of the pushing piece 33 in the movement process is improved. Preferably, the two inner walls of the support seat 10, which are opposite to each other, are both provided with the guide groove 103, the side wall of the pushing member 33 is provided with two limiting protrusions 332, and the limiting protrusions 332 correspond to the guide grooves 103 one to one, so that the pushing member 33 has better stability in the moving process.

Optionally, referring to fig. 2 and fig. 3, as an embodiment of the large-stroke electric clamping jaw provided by the present application, each clamping assembly 20 includes a clamping finger 21, a first connecting rod 22 and a second connecting rod 23, wherein one end of the first connecting rod 22 and one end of the second connecting rod 23 are respectively rotatably connected to the supporting seat 10, the other end of the first connecting rod 22 and the other end of the second connecting rod 23 are respectively rotatably connected to the clamping finger 21, and one end of the second connecting rod 23 connected to the supporting seat 10 is further hinged to the pushing member 33. Specifically, the clamp finger 21 is provided with a third mounting hole 211 and a fourth mounting hole 212, two ends of the first link 22 are respectively provided with a fifth mounting hole 221 and a sixth mounting hole 222, two ends of the second link 23 are respectively provided with a seventh mounting hole 231 and an eighth mounting hole 232, and four third connecting pins 25 are arranged in the support seat 10, wherein the position of the fifth mounting hole 221 corresponds to the position of the third mounting hole 211, one end of the first link 22 can be connected with the clamp finger 21 and realize rotational connection through the second connecting pin 24 penetrating through the third mounting hole 211 and the fifth mounting hole 221, the position of the seventh mounting hole 231 corresponds to the position of the fourth mounting hole 212, and one end of the second link 23 can be connected with the clamp finger 21 and realize rotational connection through the other second connecting pin 24 penetrating through the fourth mounting hole 212 and the seventh mounting hole 231, the other end of the first link 22 can be rotatably connected to the support base 10 by the third coupling pin 25 penetrating through the sixth mounting hole 222, the other end of the second link 23 can be rotatably connected to the support base 10 by the other third coupling pin 25 penetrating through the eighth mounting hole 232, and the second coupling pin 24 and the other second coupling pin 24, the third coupling pin 25 and the other third coupling pin 25, and the second coupling pin 24 and the third coupling pin 25 are parallel to each other, and the axes of the two second coupling pins 24 and the axes of the two third coupling pins 25 on the same clamping assembly 20 respectively pass through four intersection points of a parallelogram, so that the clamping surfaces of the pair of clamping fingers 21 can be ensured to be kept parallel in the moving process, which is beneficial to improving the stability of the pair of clamping assemblies 20 when opening; and a ninth mounting hole is further formed at the end of the second connecting rod 23 connected to the support seat 10, the ninth mounting hole is located at one side of the eighth mounting hole 232 close to the sixth mounting hole 222, and meanwhile, the pushing member 33 is formed with a tenth mounting hole, and the end of the second connecting rod 23 connected to the support seat 10 can be connected to the pushing member 33 and hinged through the first connecting pin 35 penetrating through the ninth mounting hole and the tenth mounting hole, so that the pushing member 33 can drive the pair of clamping assemblies 20 to open or close.

Optionally, referring to fig. 2 and fig. 3, as an embodiment of the large-stroke electric clamping jaw provided by the present application, a first connecting portion 233 is disposed at one end of the second connecting rod 23 connected to the supporting seat 10, meanwhile, the pushing member 33 is disposed with a second connecting portion 331, the driving assembly 30 further includes a connecting member 34, and two ends of the connecting member 34 are respectively hinged to the first connecting portion 233 and the second connecting portion 331. Specifically, the first connecting portion 233 is provided with a ninth mounting hole, the second connecting portion 331 is provided with a tenth mounting hole, the two ends of the connecting member 34 are provided with an eleventh mounting hole and a twelfth mounting hole respectively, the position of the ninth mounting hole corresponds to the position of the eleventh mounting hole, the position of the tenth mounting hole corresponds to the position of the twelfth mounting hole, the first connecting pin 35 is arranged in the ninth mounting hole and the eleventh mounting hole in a penetrating manner, one end of the second connecting rod 23 connected with the supporting seat 10 can be connected with the connecting member 34 and hinged to the connecting member, the other first connecting pin 35 is arranged in the tenth mounting hole and the twelfth mounting hole in a penetrating manner, and the pushing member 33 can be connected with the connecting member 34 and hinged to the connecting member. During the operation of the large-stroke electric clamping jaw 1, the pushing piece 33 drives the pair of clamping assemblies 20 to open or close through the two connecting pieces 34, so that the stroke of the clamping fingers 21 is increased.

It can be understood that, because the 'connecting pin' is in surface contact with the 'mounting hole', the assembling precision and stability of the 'connecting rod' and the 'clamping finger', the 'connecting rod' and the 'supporting seat' and the 'connecting rod' and the 'pushing piece' are improved.

Optionally, referring to fig. 3, as a specific example of the large-stroke electric clamping jaw provided by the present application, the connecting member 34 is an i-shaped member, and the first connecting portion 233 and the second connecting portion 331 respectively extend into two grooves 340 of the i-shaped member and are hinged to the i-shaped member through the first coupling pin 35. That is, the connecting member 34 has four end portions, wherein eleventh mounting holes are respectively formed in two end portions located on two sides of the same recess 340, twelfth mounting holes are respectively formed in two end portions located on two sides of the other recess 340, the two end portions having the eleventh mounting holes clamp the first connecting portion 233, and the two end portions having the twelfth mounting holes clamp the second connecting portion 331. Thereby making the connection of the first and second connection parts 233 and 331 to the connection member 34, respectively, more stable.

Optionally, referring to fig. 2, as an embodiment of the large-stroke electric clamping jaw provided by the present application, a pair of clamping assemblies 20 are symmetrically disposed, and the moving direction of the pushing member 33 is located on the centerline of an included angle between the pair of clamping assemblies 20. I.e. the angled median lines of the pair of gripper assemblies 20 are collinear with the axis of the rotor shaft 311. Thereby ensuring that the pusher 33 is able to drive the pair of gripper assemblies 20 to oscillate in opposite directions at the same speed.

Optionally, referring to fig. 3, as an embodiment of the large-stroke electric clamping jaw provided in the present application, a bearing 14 is disposed on the supporting portion 13, and an end of the protruding portion 3110 of the rotor shaft 311 away from the rotor 312 is inserted into the bearing 14. Specifically, a receiving groove is formed on a surface of the supporting portion 13 facing the rotor shaft 311, the bearing 14 is received in the receiving groove and is fixedly connected to the supporting portion 13, and an end of the protruding portion 3110 away from the rotor 312 is inserted into an inner ring of the bearing 14. Friction between the rotor shaft 311 and the support portion 13 can be effectively reduced by the bearing 14.

Optionally, referring to fig. 1 to fig. 3, as a specific embodiment of the large-stroke electric clamping jaw provided in the present application, the supporting seat 10 includes a first seat body 11 and a second seat body 12, wherein the first seat body 11 and the second seat body 12 are disposed opposite to each other, and the first seat body 11 and the second seat body 12 are spliced to form a mounting cavity 101 and an avoiding opening 102, a first mounting hole 110 is formed in a wall of the first seat body 11 away from the avoiding opening 102, and the first mounting hole 110 and the avoiding opening 102 are respectively communicated with the mounting cavity 101; meanwhile, two ends of the supporting portion 13 are respectively and fixedly connected to the inner wall of the first seat 11 and the inner wall of the second seat 12. Specifically, one end of the clamping component 20 extends into the mounting cavity 101 and is rotatably connected to the inner wall of the first seat 11 and the inner wall of the second seat 12, and the other end of the clamping component 20 passes through the avoiding opening 102 and extends out of the supporting seat 10; the motor 31 is mounted on a wall of the first housing 11 away from the escape opening 102, and the protruding portion 3110 of the rotor shaft 311 protrudes into the mounting cavity 101 through the first mounting hole 110, and the nut 32 and the pushing member 33 are accommodated in the mounting cavity 101.

Optionally, referring to fig. 2 and fig. 3, as a specific embodiment of the large-stroke electric clamping jaw provided in the present application, the large-stroke electric clamping jaw 1 further includes a control assembly 40, the control assembly 40 is installed on a side of the motor 31 away from the pushing member 33, the control assembly 40 includes a main control circuit board 41 and an encoder, and a circuit board 42 of the encoder is disposed opposite to the main control circuit board 41 and is perpendicular to the rotor shaft 311. Specifically, the encoder and the motor 31 are electrically connected to the main control circuit board 41, and the angular displacement of the rotor shaft 311 can be converted into an electrical signal by the encoder and sent to the main control circuit board 41, so that the angular velocity of the rotor shaft 311 can be accurately controlled by the main control circuit board 41, and the pair of clamping assemblies 20 can be accurately controlled; in some embodiments of the present application, the large-stroke power-operated clamping jaw 1 further comprises a housing 50, the housing 50 comprising a housing 51 and a cover 52, wherein, the shell 51 is fixedly connected to one end of the supporting seat 10 away from the pair of clamping assemblies 20, and first opening and second opening have been seted up respectively to the both ends of casing 51, first opening docks with first mounting hole 110 of first pedestal 11, the second opening is by lid 52 closing cap, motor 31 and control assembly 40 are installed in casing 51, the extension 3110 of rotor shaft 311 passes first opening and stretches into in installation cavity 101 behind the first mounting hole 110 in proper order, control assembly 40 is located the one side that motor 31 is close to the second opening, main control circuit board 41 and the circuit board 42 of encoder are along the axial parallel arrangement of rotor shaft 311, be favorable to the inside finite space of make full use of casing 51, make the structure of big stroke electric clamping jaw 1 compacter.

Optionally, referring to fig. 2 and fig. 3, as an embodiment of the large-stroke electric clamping jaw provided by the present application, the encoder includes a magnet 43, and the magnet 43 is fixedly connected to an end of the rotor shaft 311 away from the supporting seat 10; the main control circuit board 41 is provided with an avoiding hole 410 in the middle, one end of the rotor shaft 311 away from the support seat 10 penetrates through the avoiding hole 410, and the magnet 43 is in clearance fit with the circuit board 42 of the encoder. I.e., the encoder is a magnetic encoder, the main control circuit board 41 is located between the rotor 312 of the motor 31 and the circuit board 42 of the encoder. Thereby being beneficial to reducing the axial length of the large-stroke electric clamping jaw 1 and further miniaturizing the large-stroke electric clamping jaw 1.

It is understood that the terms "sleeved" and "fixedly connected" in the present application may be a connection by a bolt and a nut, or a connection by a screw, or may be a welding.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (10)

1. The utility model provides an electronic clamping jaw of large stroke, includes supporting seat, a pair of centre gripping subassembly and drive assembly, and is a pair of the centre gripping subassembly set up relatively and rotate connect in on the supporting seat, drive assembly install in the supporting seat is kept away from a pair of the one end of centre gripping subassembly, its characterized in that: the supporting seat comprises a supporting part located between the pair of clamping components, the driving component comprises a motor, a nut and a pushing part, a rotor shaft of the motor is provided with a protruding part, the protruding part extends into the supporting seat, one end, far away from a rotor of the motor, of the protruding part penetrates through the pushing part and then is rotatably connected to the supporting part, the protruding part is provided with a thread, the nut is in threaded connection with the protruding part, the pushing part is sleeved on the nut and is respectively hinged to the pair of clamping components, and the pair of clamping components can be driven to be opened and closed.

2. The large stroke power operated jaw of claim 1, wherein: at least one inner wall of the supporting seat is provided with a guide groove, and the length direction of the guide groove is parallel to the axial direction of the rotor shaft; and the side wall of the pushing piece is provided with a limiting bulge, and the limiting bulge extends into the guide groove to form sliding connection.

3. The large stroke power operated jaw of claim 1, wherein: the clamping assembly comprises a clamping finger, a first connecting rod and a second connecting rod, one end of the first connecting rod and one end of the second connecting rod are respectively and rotatably connected with the supporting seat, the other end of the first connecting rod and the other end of the second connecting rod are respectively and rotatably connected with the clamping finger, and one end of the second connecting rod, which is connected with the supporting seat, is also hinged with the pushing piece.

4. A large-stroke power-driven clamping jaw as claimed in claim 3, characterized in that: the driving assembly further comprises a connecting piece, and two ends of the connecting piece are hinged to the first connecting portion and the second connecting portion respectively.

5. The large stroke power operated jaw of claim 4, wherein: the connecting piece is an I-shaped piece, and the first connecting part and the second connecting part respectively extend into the two grooves of the I-shaped piece and are hinged with the I-shaped piece through a first connecting pin.

6. A large-stroke electric jaw as claimed in any one of claims 1 to 5, characterized in that: the pair of clamping assemblies are symmetrically arranged, and the moving direction of the pushing piece is positioned on the included angle median line of the pair of clamping assemblies.

7. The large stroke power operated jaw of claim 6, wherein: the supporting part is provided with a bearing, and one end of the extending part, which is far away from the rotor, is inserted in the bearing.

8. The large stroke power operated jaw of claim 6, wherein: the supporting seat comprises a first seat body and a second seat body, the first seat body and the second seat body are oppositely arranged and spliced to form a mounting cavity and an avoiding opening, a first mounting hole is formed in a seat wall of the first seat body, which is far away from the avoiding opening, and the first mounting hole and the avoiding opening are respectively communicated with the mounting cavity; and two ends of the supporting part are respectively and fixedly connected to the inner wall of the first seat body and the inner wall of the second seat body.

9. The large stroke power operated jaw of claim 6, wherein: the motor is characterized by further comprising a control assembly, the control assembly is mounted on one side, far away from the pushing piece, of the motor and comprises a main control circuit board and an encoder, and the circuit board of the encoder is opposite to the main control circuit board and is respectively perpendicular to the rotor shaft.

10. The large stroke power operated jaw of claim 9, wherein: the encoder comprises a magnet which is fixedly connected to one end, far away from the supporting seat, of the rotor shaft; the middle part of master control circuit board has been seted up and has been dodged the hole, the rotor shaft is kept away from the one end of supporting seat passes dodge the hole, magnet with the circuit board clearance fit of encoder.

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