Electric clamping jaw driven by external driving motor

Abstract

The utility model discloses an electric clamping jaw driven by an external driving motor, which comprises a clamping jaw part, a driving motor and a connecting part, the clamping jaw part comprises an electric jaw piston and a functional component driven by the electric jaw piston, and the functional component implements clamping action; the driving motor comprises a screw rod; the connecting part comprises a mounting seat and a nut in threaded fit with the lead screw, the driving motor is fixed to the clamping jaw part through the mounting seat, and the electric jaw piston is slidably connected with the mounting seat and detachably and fixedly connected with the nut. The clamping jaw part and the external driving motor part can be separated to serve as independent individuals, disassembly and assembly are quite easy and convenient, disassembly and assembly are not strenuous due to the movable connection mode of the nut and the electric jaw piston, meanwhile, the lead screw cannot be damaged, and parts can be replaced almost only by disassembling and assembling the installation base.

Description

Technical Field

[0001] The utility model relates to the technical field of electric clamps, in particular to an electric clamp used in the fields of medical treatment, automation, etc. for clamping objects. Background Art

[0002] In the field of automation and medical equipment, it is often necessary to install a manipulator that can pick up workpieces. Pneumatic grippers are currently the most widely used, but they have the defects of being unable to accurately position and having unstable clamping force. When it is necessary to clamp precise and fragile workpieces, the workpieces may be damaged. In places where there is no compressed air source, or in precision laboratories, pharmaceutical preparations, hospitals, and drug testing that have high requirements for the environment, the noise generated by pneumatic grippers has greatly restricted the application of pneumatic grippers or even disabled them.

[0003] Based on the pneumatic gripper, the applicant has also developed and designed a micro electric gripper that uses a through-screw stepper motor and a gripper part, as described in patent number CN213532656U. The micro gripper has a relatively small structure, but the disassembly and repair are relatively complicated. Because the through-motor uses the nut as a rotor built into the motor, the screw and the nut thread cooperate, and the screw can pass through the motor for linear motion. If the plastic nut needs to be replaced, the gripper of this structure needs to first separate the motor and the gripper, and then disassemble the motor part separately to replace the rotor with internal threads. The cost of rework and replacement of parts is high.

[0004] In addition, the screw rod and the electric gripper piston are connected by threads and glue. On the one hand, there is a risk of falling off, and on the other hand, it is very difficult to disassemble. The screw rod used in the micro gripper is thinner, and forced disassembly can easily cause the screw rod to bend. Therefore, the piston and screw rod need to be replaced at the same time during maintenance. Utility Model Content

[0005] In order to solve the technical problem that the electric clamps in the prior art are difficult to repair and disassemble, the utility model provides an electric clamp driven by an external drive motor to solve the above problem.

[0006] The technical solution adopted by the utility model to solve its technical problems is: an electric clamp driven by an external drive motor, comprising a clamping jaw part, a driving motor and a connecting part, the clamping jaw part comprising an electric clamp piston and a functional component driven by the electric clamp piston, and the functional component implements a clamping action; the driving motor comprises a screw rod; the connecting part comprises a mounting seat and a nut matched with the screw rod thread, the driving motor is fixed to the clamping jaw part through the mounting seat, and the electric clamp piston is slidably connected to the mounting seat and detachably fixedly connected to the nut.

[0007] Furthermore, the screw rod is directly connected to the rotor assembly of the drive motor.

[0008] Furthermore, the connecting part also includes an electric gripper cylinder body, a mounting seat and a functional component are respectively fixed at two ends of the electric gripper cylinder body, and the electric gripper piston and the nut are located in a cavity surrounded by the electric gripper cylinder body, the mounting seat and the functional component.

[0009] Furthermore, a guide column is fixed on the mounting seat, and a guide hole that slides with the guide column is provided on the electric claw piston.

[0010] Furthermore, the mounting seat has a positioning countersunk hole for inserting one end of the guide column, and the mounting seat and the guide column are fixed by a locking screw.

[0011] Furthermore, the nut includes a limiting portion and a threaded portion with an internal thread, and the electric claw piston includes a sleeve matched with an outer surface of the threaded portion and a mounting plate detachably fixedly connected to the limiting portion.

[0012] Furthermore, the limiting portion has a threaded portion protruding radially outward, and the mounting plate has a groove for accommodating the limiting portion.

[0013] Furthermore, a boss is provided on the top of the guide column, and the diameter of the boss is larger than the diameter of the guide hole.

[0014] Furthermore, the limiting portion is located at one end of the threaded portion close to the driving motor.

[0015] Furthermore, a center hole is provided at the center of the mounting seat, and the outer diameter of the limiting portion is smaller than the diameter of the center hole.

[0016] The beneficial effects of the utility model are:

[0017] (1) The clamping jaw part and the external drive motor part of the utility model can be separated as separate units, which is very convenient for disassembly and assembly. The movable connection between the nut and the electric claw piston makes disassembly and assembly effortless and will not damage the screw rod. Replacing parts almost only requires disassembling the mounting base.

[0018] (2) The drive motor in the utility model adopts an external drive motor in which the screw rod is directly connected to the rotor assembly. The rotor is in the bearing and has relatively good concentricity. At the same time, because the piston and the guide column are concentric, the concentricity is further guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0020] Figure 1 It is a three-dimensional diagram of the electric gripper driven by the external drive motor described in the utility model;

[0021] Figure 2 It is an axial cross-sectional view of the electric clamp driven by the external drive motor described in the utility model;

[0022] Figure 3 It is an exploded view of the electric gripper driven by the external drive motor described in the utility model;

[0023] Figure 4 It is a schematic diagram of the assembly of the connecting part and the electric claw piston in the utility model.

[0024] In the figure, 1, jaw part, 101, electric claw piston, 1011, sleeve, 1012, mounting plate, 102, slide assembly, 103, fork, 2, drive motor, 201, screw rod, 3, connecting part, 301, mounting seat, 3011, center hole, 3012, positioning countersunk hole, 302, nut, 3021, limiting part, 3022, threaded part, 303, electric claw cylinder body, 304, guide column, 3041, boss, 4, cavity, 5, fork shaft, 6, groove, 7, guide hole, 8, locking screw. DETAILED DESCRIPTION

[0025] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0026] like Figure 1-Figure 3 As shown, an electric gripper driven by an external drive motor comprises a gripper part 1, a drive motor 2 and a connection part 3, wherein the gripper part 1 comprises an electric gripper piston 101 and a functional component driven by the electric gripper piston 101, wherein the functional component performs a clamping action; the drive motor 2 is a screw stepping motor; the connection part 3 comprises a mounting seat 301 and a nut 302 threadedly matched with the screw 201, wherein the nut 302 is located outside the drive motor 2, and the drive motor 2 is fixed to the gripper part 1 through the mounting seat 301, and the electric gripper piston 101 is slidably connected to the mounting seat 301 and detachably fixedly connected to the nut 302. The nut 302 and the electric gripper piston 101 are circumferentially limited and both perform linear motion. When the drive motor 2 is powered on and pulsed, the rotor assembly drives the screw 201 to perform rotational motion, and the nut 302 converts the rotational motion of the screw 201 into linear motion, driving the electric gripper piston 101 to reciprocate linear motion, and the electric gripper piston 101 then drives the functional component to open or close.

[0027] The functional component can be a four-link clamp or a slide assembly 102 connected by a fork 103. The fork 103 is hinged to the electric clamp piston 101 and drives the two sliders on the slide assembly 102 to slide back and forth through rotation.

[0028] The utility model separates the clamping jaw part from the driving motor 2 as separate units. When assembling, the nut 302 is first installed on the electric claw piston 101, the electric claw piston 101 is connected to the mounting seat 301, the mounting seat 301 is fixed to the functional component, and finally the screw rod 201 is combined with the nut 302 to fix the driving motor 2 and the mounting seat 301. It is also very easy to disassemble and assemble. The movable connection between the nut 302 and the electric claw piston 101 makes disassembly and assembly effortless and will not damage the screw rod 201. To replace parts, it is almost only necessary to disassemble and assemble the mounting seat 301.

[0029] The drive motor 2 preferably has a screw 201 directly connected to the rotor assembly of the drive motor 2, for example, an external drive screw stepper motor can be used. Because the nut of the traditional through motor is inside and relatively small, and the nut has a radial gap, the screw is easy to swing, while the external drive motor used in the utility model has a nut 302 located outside the motor, and the screw 201 is directly connected to the motor rotor. The rotor is in the bearing, and the concentricity is relatively good.

[0030] The connecting part 3 also includes an electric claw cylinder 303, a mounting seat 301 and a functional component are respectively fixed at both ends of the electric claw cylinder 303, and the electric claw piston 101 and the nut 302 are located in a cavity 4 surrounded by the electric claw cylinder 303, the mounting seat 301 and the functional component. Figure 2 As shown, the electric claw cylinder 303 is a barrel-shaped structure with two axial ends connected, the mounting seat 301 is the end plate at the lower end of the electric claw cylinder 303, and the functional components are located at the upper end of the electric claw cylinder 303. The mounting seat 301 is used to support the electric claw piston 101 and transfer the electric claw cylinder 303 and the drive motor 2. The setting of the electric claw cylinder 303 can surround the moving parts of the connecting part 3 in the cavity 4, thereby playing a role in dust and collision prevention for the moving parts and improving the service life. Figure 2 and Figure 3 As shown, the fork 103 is hinged to the electric claw cylinder 303 through the fork shaft 5, and the two ends of the fork 103 are respectively hinged to the electric claw piston 101 and the slider of the slide assembly 102, so that the fork 103 can only realize the swing arm movement, and the fork 103 drives the slide assembly 102 to open and close. When the motor parts are to be replaced, since the nut 302 and the electric claw piston 101 are movably connected, the nut 302 and the screw rod 201 only need to be removed from the electric claw cylinder 303 to replace them without damaging the screw rod 201.

[0031] In order to further improve the concentricity of the reciprocating motion of the electric claw piston 101, in a further design, a guide post 304 is fixed on the mounting seat 301, and the electric claw piston 101 has a guide hole 7 that slidably cooperates with the guide post 304. Figure 4As shown, two guide posts 304 are symmetrically arranged, and the electric claw piston 101 is inserted into the guide posts 304 on both sides, so that the electric claw piston 101 can only run in the guide posts 304 and along the axial direction of the guide posts 304. The electric claw piston 101 is limited by both sides, and the operation is more stable and reliable. The mounting seat 301 has a positioning countersunk hole 3012 for inserting one end of the guide post 304, and the mounting seat 301 and the guide post 304 are fixed by locking screws 8. The positioning countersunk hole 3012 is fitted and positioned with the bottom surface and circumferential surface of the guide post 304, and the screw is locked through the positioning countersunk hole 3012 and connected to the guide post 304, which can ensure the verticality of the guide post 304.

[0032] In order to prevent the electric claw piston 101 from moving upward and separating from the guide column 304, a boss 3041 is preferably provided on the top of the guide column 304, and the diameter of the boss 3041 is larger than the diameter of the guide hole 7, so that the electric claw piston 101 stops when it runs to the boss 3041.

[0033] The nut 302 and the electric claw piston 101 can be matched with each other in the following structure but are not limited to it:

[0034] The nut 302 includes a limiting portion 3021 and a threaded portion 3022 having an internal thread, and the electric claw piston 101 includes a sleeve 1011 matched with the outer surface of the threaded portion 3022 and a mounting plate 1012 detachably fixedly connected to the limiting portion 3021. The threaded portion 3022 is used to match with the screw rod 201, and the sleeve 1011 is used to ensure the concentricity of the nut 302 and the electric claw piston 101. The limiting portion 3021 achieves relative limiting of the nut 302 and the electric claw piston 101 by fixing with the mounting plate 1012.

[0035] The limiting portion 3021 preferably protrudes radially outward from the threaded portion 3022, and the mounting plate 1012 has a groove 6 for accommodating the limiting portion 3021. In other optional embodiments, the limiting portion 3021 may also be the threaded portion 3022 itself or extend outward from one end of the threaded portion 3022.

[0036] When the limiting portion 3021 protrudes radially outward, the limiting portion 3021 can be located in the middle of the threaded portion 3022 or at both ends of the threaded portion 3022. When replacing parts, the nut 302 needs to be separated from the electric claw piston 101. Therefore, the limiting portion 3021 is preferably located at one end of the threaded portion 3022 close to the drive motor 2. After the nut 302 is disassembled from the electric claw piston 101, the nut 302 can be directly taken out from downward.

[0037] Since the electric claw piston 101 and the nut 302 are located above the mounting base 301, and the drive motor 2 is located below the mounting base 301, when the nut 302 is replaced, the nut 302 needs to be removed from the bottom. Therefore, a center hole 3011 is provided in the center of the mounting base 301. In order to ensure that the nut 302 can be smoothly removed and to play a certain limiting role on the nut 302, the center hole 3011 is preferably a circular hole, and the outer diameter of the limiting portion 3021 is smaller than the diameter of the center hole 3011. When the nut 302 deviates from the center, the outer edge of the center hole 3011 will affect the installation of the nut 302, thereby playing a limiting role and ensuring good installation stability.

[0038] The electric clamp of the utility model is also more convenient for replacing consumable parts such as the nut 302, and has higher installation concentricity and better operating stability.

[0039] In the description of the present invention, it is necessary to understand that the terms "center", "upper", "lower", "inner", "outer", "axial", "radial", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0040] In this specification, the schematic representation of the terms does not necessarily refer to the same embodiment. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in one or more embodiments.

[0041] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. An electric gripper driven by an external drive motor, characterized in that: include: A clamping jaw portion (1) comprises an electric clamping jaw piston (101) and a functional component driven by the electric clamping jaw piston (101), wherein the functional component performs a clamping action; A driving motor (2), comprising a screw rod (201); The connecting portion (3) comprises a mounting seat (301) and a nut (302) threadably matched with the lead screw (201); the driving motor (2) is fixed to the clamping jaw portion (1) via the mounting seat (301); the electric clamp piston (101) is slidably connected to the mounting seat (301) and is detachably fixedly connected to the nut (302).

2. The electric gripper driven by an external drive motor according to claim 1, characterized in that: The screw rod (201) is directly connected to the rotor assembly of the drive motor (2).

3. The electric gripper driven by an external drive motor according to claim 1, characterized in that: The connecting portion (3) further comprises an electric claw cylinder (303), the mounting seat (301) and the functional component are respectively fixed at two ends of the electric claw cylinder (303), and the electric claw piston (101) and the nut (302) are located in a cavity (4) surrounded by the electric claw cylinder (303), the mounting seat (301) and the functional component.

4. The electric gripper driven by an external drive motor according to claim 3, characterized in that: A guide column (304) is fixed on the mounting seat (301), and a guide hole (7) that is slidably matched with the guide column (304) is provided on the electric claw piston (101).

5. The electric gripper driven by an external drive motor according to claim 4, characterized in that: The mounting seat (301) has a positioning countersunk hole (3012) for inserting one end of the guide column (304), and the mounting seat (301) and the guide column (304) are fixed by means of a locking screw (8).

6. The electric gripper driven by an external drive motor according to claim 1, characterized in that: The nut (302) comprises a limiting portion (3021) and a threaded portion (3022) having an internal thread, and the electric claw piston (101) comprises a sleeve (1011) matched with the outer surface of the threaded portion (3022) and a mounting plate (1012) detachably fixedly connected to the limiting portion (3021).

7. The electric gripper driven by an external drive motor according to claim 6, characterized in that: The limiting portion (3021) has a threaded portion (3022) protruding radially outward, and the mounting plate (1012) has a groove (6) for accommodating the limiting portion (3021).

8. The electric gripper driven by an external drive motor according to claim 4, characterized in that: A boss (3041) is provided on the top of the guide column (304), and the diameter of the boss (3041) is greater than the diameter of the guide hole (7).

9. The electric gripper driven by an external drive motor according to claim 7, characterized in that: The limiting portion (3021) is located at an end of the threaded portion (3022) close to the driving motor (2).

10. The electric gripper driven by an external drive motor according to claim 6, characterized in that: A central hole (3011) is provided at the center of the mounting seat (301), and the outer diameter of the limiting portion (3021) is smaller than the diameter of the central hole (3011).

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