Multifunctional servo three-finger clamping jaw

Abstract

The utility model relates to a multifunctional servo three-finger clamping jaw which comprises a base, sliding rails are arranged on the surface of the base from one center to three directions, every two of the three sliding rails are distributed at an interval of 120 degrees, the sliding rails are connected with outer jaw arms in a sliding mode, the sliding rails are further connected with inner jaw arms in a sliding mode, and the inner jaw arms are closer to the center of the surface of the base compared with the outer jaw arms. The three inner claw arms can be pushed and pressed by the outer claw arms to clamp inwards, and the outer claw arms and the inner claw arms are matched with parts with ring-shaped contact surfaces and conical contact surfaces correspondingly. The effect of stable clamping force on the contact surface of the ring-shaped part and the conical part through driving of a single device is achieved, the application range is widened, and the flexibility is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of clamping tools, in particular to a multifunctional servo three-finger clamp. Background Art

[0002] In modern manufacturing, the performance of the clamping device, as an indispensable part of the automated production line, directly affects production efficiency and product quality. Especially when dealing with parts of various shapes and sizes, the flexibility and versatility of the clamping device become key considerations. Although ring-shaped parts and conical parts have different shapes, their common feature is that they both have a circular surface. This feature requires that the clamping devices of both can use multiple claw arms to clamp the surface of the part synchronously from the periphery to ensure sufficient clamping force and avoid damage to the surface of the part; however, due to the difference in surface characteristics between the two, different clamping devices are used to clamp the two parts in the usual design, which has low versatility and flexibility and high cost. Utility Model Content

[0003] 1. Technical issues to be solved

[0004] The utility model aims to provide a multifunctional servo three-finger clamp which can flexibly realize stable clamping of ring-shaped parts and conical parts.

[0005] 2. Technical Solution

[0006] The utility model is realized by the following technical solutions:

[0007] The utility model proposes a multifunctional servo three-finger gripper, comprising a base, wherein the surface of the base is provided with slide rails in three directions with a center, wherein the three slide rails are distributed at intervals of 120° between each other, wherein an outer claw arm is slidably connected to the slide rail, wherein an inner claw arm closer to the center of the surface of the base than the outer claw arm is slidably connected to the slide rail, wherein the three inner claw arms can be pushed by the outer claw arms to clamp inwards, and wherein the outer claw arms and the inner claw arms are respectively adapted to parts with annular and conical contact surfaces.

[0008] Furthermore, a fixing plate is fixedly connected to the slide rail, a guide rod is fixedly connected to the side of the fixing plate, the other end of the guide rod is fixedly connected to a limiting plate, the axis of the guide rod is parallel to the length direction of the slide rail, a guide hole is opened under the inner claw arm, the guide rod is slidably connected to the guide hole, a spring is sleeved on the guide rod, and the two ends of the spring are respectively fixedly connected to the inner claw arm and the fixing plate.

[0009] Furthermore, a limiting vertical plate is fixedly connected to the lower side of the outer claw arm, a limiting groove is provided on the surface of the base which is slidably connected to the limiting vertical plate, the length direction of the limiting groove is parallel to the direction of the slide rail, a sliding block is fixedly connected to the lower side of the limiting vertical plate, a lead screw is rotatably connected inside the base, the sliding block is threadedly connected to the lead screw, and the lead screw is rotated by being driven by a driving assembly.

[0010] Furthermore, the drive assembly includes a motor fixed to a base, the output end of the motor is connected to a gear box, the output shaft of the gear box is vertically upward and extends into the base, the output shaft end of the gear box is coaxially fixedly connected to a driving bevel gear, the driving bevel gear is meshed and connected with three driven bevel gears at equal intervals in the circumferential direction, and the three driven bevel gears are coaxially fixedly connected to the ends of three lead screws.

[0011] Furthermore, the inner wall surface of the inner claw arm includes a conical surface that gradually inclines outward from bottom to top, and the conical surface is adapted to the conical surface of the part to be clamped.

[0012] Furthermore, a rubber pad is fixed on the inner side of the outer claw arm.

[0013] 3. Beneficial Effects

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] The utility model realizes synchronous clamping of three outer claw arms by synchronously driving the slider to move on three lead screws through the driving assembly. In addition, the outer claw arms are provided to clamp and fix the annular parts, and the conical parts are provided to be fixed by being pushed by the outer claw arms. The utility model realizes the effect of stabilizing the clamping force on the contact surfaces of the annular parts and the conical parts by driving with a single device, thereby improving the scope of application and flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the clamping ring-shaped parts of the utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the utility model for clamping a conical part;

[0018] Figure 3 It is a schematic diagram of the structure inside the base of the utility model;

[0019] Figure 4 is a schematic diagram of the structure of the inner claw arm;

[0020] 1-base; 101-limiting groove; 2-slide rail; 3-outer claw arm; 4-inner claw arm; 401-guide hole; 402-conical surface; 5-fixed plate; 6-guide rod; 7-limiting plate; 8-spring; 9-slider; 10-limiting vertical plate; 11-screw; 12-drive assembly; 1201-motor; 1202-gear box; 1203-driving bevel gear; 1204-driven bevel gear; 13-rubber pad. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0022] A multifunctional servo three-finger gripper, please refer to Figure 1-4 , including a base 1 with a hollow interior, and slide rails 2 are arranged on the surface of the base 1 in three directions with a center, and the three slide rails 2 are distributed at 120° intervals between each other. The base 1 is preferably in the shape of an equilateral triangle, and the center line of the slide rail 2 is located on the line connecting the center of the base 1 to each corner.

[0023] An outer claw arm 3 and an inner claw arm 4 are slidably connected to the slide rail 2, wherein the inner claw arm 4 is closer to the center of the surface of the base 1 than the outer claw arm 3. The outer claw arm 3 is driven by a driving assembly 12 to slide on the slide rail 2. When clamping an annular part (such as a hub, a sleeve, etc.), the outer claw arm 3 clamps on the outer circumference of the annular part from the outside; when clamping a conical part, the outer claw arm 3 moves inward and pushes the inner claw arm 4, and the inner claw arm 4 is then clamped on the outer circumference of the conical part from the outside; when the outer claw arm 3 clamps the annular part, the inner claw arm 4 is located inside the annular part without interfering with the part.

[0024] Among them, the outer claw arm 3 and the inner claw arm 4 are respectively configured to adapt to parts with annular and conical contact surfaces to maintain a stable clamping force; specifically, the inner wall surface of the inner claw arm 4 includes a conical surface 402 which gradually tilts outward from bottom to top, and the conical surface 402 is adapted to the conical surface of the part to be clamped to maintain a stable clamping force on the conical part; a rubber pad 13 is fixed on the inner side of the outer claw arm 3, and the rubber pad 13 is in flexible contact with the annular part, and the friction force is relatively large so that the outer claw arm 3 can maintain a stable clamping force on the annular part.

[0025] Among them, a fixed plate 5 is fixedly connected to the slide rail 2, a guide rod 6 is fixedly connected to the side of the fixed plate 5, and the other end of the guide rod 6 is fixedly connected to the limit plate 7. The axis of the guide rod 6 is parallel to the length direction of the slide rail 2. A guide hole 401 is opened below the inner claw arm 4. The guide rod 6 is slidably connected to the guide hole 401. A spring 8 is sleeved on the guide rod 6, and the two ends of the spring 8 are respectively fixedly connected to the inner claw arm 4 and the fixed plate 5. After the outer claw arm 3 moves along the slide rail 2 and contacts the inner claw arm 4, it moves inward and pushes the inner claw arm 4. The spring 8 is compressed and shortened until the inner claw arm 4 is clamped on the outer peripheral surface of the conical part. After the outer claw arm 3 is released, the inner claw arm 4 is reset by the rebound force of the spring 8.

[0026] The driving assembly 12 includes a motor 1201 fixed to the base 1, the output end of the motor 1201 is connected to a gear box 1202, the output shaft of the gear box 1202 is vertically upward and extends into the base 1, the output shaft end of the gear box 1202 is coaxially fixedly connected to a driving bevel gear 1203, the driving bevel gear 1203 is meshed and connected with three driven bevel gears 1204 at equal intervals in the circumferential direction, the three driven bevel gears 1204 are coaxially fixedly connected to the ends of three lead screws 11, respectively, the lead screws 11 are rotatably connected to the base 1, each lead screw 11 is threadedly connected to a slider 9, the motor 1201 drives the driving bevel gear 1203 to rotate through the gear box 1202, the driving bevel gear 1203 drives the driven bevel gear 1204 to rotate, the driven bevel gear 1204 drives the lead screw 11 to rotate, and the three lead screws 11 synchronously drive the three sliders 9 to move along the lead screw 11;

[0027] A limiting vertical plate 10 is fixedly connected to the side below the outer claw arm 3. A limiting groove 101 is provided on the surface of the base 1 and is slidably connected to the limiting vertical plate 10. The length direction of the limiting groove 101 is parallel to the direction of the slide rail 2. The slider 9 is fixedly connected below the limiting vertical plate 10. When the slider 9 moves, the limiting vertical plate 10 slides in the limiting groove 101 to control the stability of the movement. At the same time, the slider 9 drives the limiting vertical plate 10, and the limiting vertical plate 10 drives the outer claw arm 3 to move along the slide rail 2.

[0028] The above embodiments are only for describing the preferred implementation of the utility model, and are not intended to limit the concept and scope of the utility model. Without departing from the design concept of the utility model, various modifications and improvements made by ordinary persons in the art to the technical solution of the utility model should fall within the protection scope of the utility model, and the technical contents of the utility model for protection have been fully recorded in the claims.

Claims

1. A multifunctional servo three-finger gripper, comprising a base, including a base (1), wherein the surface of the base (1) is provided with slide rails (2) in three directions from a center, wherein the three slide rails (2) are distributed at intervals of 120° between each other, and an outer claw arm (3) is slidably connected to the slide rail (2), characterized in that: The slide rail (2) is also slidably connected with an inner claw arm (4) which is closer to the center of the surface of the base (1) than the outer claw arm (3). The three inner claw arms (4) can be pushed inward by the outer claw arms (3) to clamp inward. The outer claw arms (3) and the inner claw arms (4) are respectively adapted to parts with annular and conical contact surfaces.

2. The multifunctional servo three-finger gripper according to claim 1, characterized in that: A fixing plate (5) is fixedly connected to the slide rail (2), a guide rod (6) is fixedly connected to the side of the fixing plate (5), the other end of the guide rod (6) is fixedly connected to a limit plate (7), the axis of the guide rod (6) is parallel to the length direction of the slide rail (2), a guide hole (401) is opened below the inner claw arm (4), the guide rod (6) is slidably connected to the guide hole (401), a spring (8) is sleeved on the guide rod (6), and the two ends of the spring (8) are respectively fixedly connected to the inner claw arm (4) and the fixing plate (5).

3. A multifunctional servo three-finger gripper according to claim 2, characterized in that: A limiting vertical plate (10) is fixedly connected to the side surface below the outer claw arm (3); a limiting groove (101) is provided on the surface of the base (1) and is slidably connected to the limiting vertical plate (10); the length direction of the limiting groove (101) is parallel to the direction of the slide rail (2); a slider (9) is fixedly connected to the limiting vertical plate (10); a lead screw (11) is rotatably connected inside the base (1); the slider (9) is threadedly connected to the lead screw (11); and the lead screw (11) is driven to rotate by a driving assembly (12).

4. The multifunctional servo three-finger gripper according to claim 3 is characterized in that: The driving assembly (12) comprises a motor (1201) fixed to a base (1); the output end of the motor (1201) is connected to a gear box (1202); the output shaft of the gear box (1202) is vertically upward and extends into the base (1); the end of the output shaft of the gear box (1202) is coaxially fixedly connected to a driving bevel gear (1203); the driving bevel gear (1203) is meshedly connected to three driven bevel gears (1204) at equal intervals in the circumferential direction; the three driven bevel gears (1204) are coaxially fixedly connected to the ends of three lead screws (11).

5. A multifunctional servo three-finger gripper according to any one of claims 1 to 4, characterized in that: The inner wall surface of the inner claw arm (4) comprises a conical surface (402) which gradually inclines outwards from bottom to top, and the conical surface (402) is adapted to the conical surface of the part to be clamped.

6. A multifunctional servo three-finger gripper according to any one of claims 1 to 4, characterized in that: A rubber pad (13) is fixed on the inner side of the outer claw arm (3).

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