Workpiece positioning and clamping device

Abstract

The utility model provides a workpiece positioning and clamping device which comprises a bottom plate and a transmission piece, a plurality of clamping assemblies are arranged on the top of the bottom plate in a sliding mode, and a driving mechanism used for driving the clamping assemblies to conduct limiting sliding clamping is arranged in the bottom plate. Each clamping assembly is rotationally provided with a rotating plate, and each rotating plate is in transmission fit with the corresponding clamping assembly through a transmission piece. Through the driving mechanism, the clamping assembly can be driven to clamp and fix a workpiece in the horizontal direction, the rotating plate can be driven through the transmission part to clamp and fix the workpiece in the vertical direction, the clamping directions are more diversified, the clamping effect is better, and therefore the workpiece is prevented from deviating during machining, and the machining efficiency is improved. And the influence of deviation on the precision and quality of the workpiece is avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to workpiece positioning and clamping technical field, concretely relates to a workpiece positioning and clamping device. BACKGROUND

[0002] Workpiece positioning and clamping is an important link in machining, and its purpose is to ensure that the workpiece keeps correct position and posture in the machining process, thereby guaranteeing machining accuracy and efficiency. However, the clamping and fixing mode of the existing workpiece positioning and clamping device is single, and cannot achieve good clamping effect.

[0003] The patent with the publication number CN211540324U discloses a workpiece positioning and clamping device, which is provided with positioning mold cores, air cylinders, second fixing members, first pin shafts, second pin shafts, first fixing members, push-pull rods, clamping members and the like. When it is necessary to clamp and fix the workpiece for machining, the workpiece is first placed between the two positioning mold cores, the two second fixing members are moved to the two sides by the air cylinders, so that the push-pull rods move the two positioning mold cores and the clamping members towards each other under the action of the first pin shafts, the second pin shafts and the first fixing members, thereby clamping the workpiece.

[0004] However, the above-mentioned fixing mode has certain limitations, and only clamps the workpiece from both sides, which can only clamp and limit the workpiece in the horizontal direction. The contact area between the clamping plate and the surface of the workpiece is small, the clamping direction is single, and good clamping effect cannot be achieved. UTILITY MODEL CONTENTS

[0005] To solve the problems in the background art, the utility model provides a workpiece positioning and clamping device.

[0006] In order to achieve the above-mentioned purpose, the utility model provides the technical scheme as follows:

[0007] A workpiece positioning and clamping device, comprising a bottom plate and a transmission member, a plurality of clamping assemblies are slidably arranged on the top of the bottom plate, and a driving mechanism for driving the plurality of clamping assemblies to limit sliding clamping is arranged in the bottom plate; a rotating plate is rotatably arranged on each clamping assembly, and each rotating plate is in transmission cooperation with the clamping assembly thereof through the transmission member.

[0008] Further, the clamping assembly comprises a sliding groove, a plurality of sliding grooves are formed on the top of the bottom plate, and a limiting plate is limitingly and slidably arranged in each sliding groove; a limiting block is fixedly arranged on the outer surface of each limiting plate, a limiting groove is formed in each sliding groove, and the limiting block and the limiting groove are in limitingly and slidingly matched one-to-one; a moving plate is fixedly arranged on the top of each limiting plate, and a clamping plate is fixedly arranged on each moving plate through an elastic member.

[0009] Further, the elastic member comprises a telescopic rod, the telescopic rod is arranged between the moving plate and the clamping plate, one end of the telescopic rod is fixedly connected with the clamping plate, and the other end of the telescopic rod is fixedly connected with the moving plate; the outer surface of the telescopic rod is sleeved with a spring, one end of the spring is fixedly connected with the clamping plate, and the other end of the spring is fixedly connected with the moving plate.

[0010] Further, the driving mechanism comprises a motor, the motor is fixedly installed in the bottom plate, an output shaft of the motor is fixedly provided with a connecting seat, and a plurality of connecting rods are eccentrically hinged at the top of the connecting seat; the connecting rods are equal in number to the limiting plates and one-to-one corresponding, and one end of each connecting rod, which is not connected with the connecting seat, is hinged with the corresponding limiting plate.

[0011] Further, the transmission member comprises a toothed plate, the connecting rod is rotatably arranged at the top of each moving plate, and the rotating plate is fixedly connected with the connecting rod in a one-to-one manner; the gear is fixedly arranged at both ends of each connecting rod, and the toothed plate is fixedly arranged on both sides of each sliding groove; the gears are equal in number to the toothed plates and one-to-one corresponding, and each toothed plate is in meshing transmission with the corresponding gear and always keeps a meshing state.

[0012] The application has the following beneficial effects:

[0013] The driving mechanism can not only drive the clamping assembly to clamp and fix the workpiece in the horizontal direction, but also drive the rotating plate to clamp and fix the workpiece in the vertical direction through the transmission member, so that the clamping direction is more diverse and the clamping effect is better, thereby preventing the workpiece from being deviated during machining and avoiding the influence of the deviation on the precision and quality of the workpiece. BRIEF DESCRIPTION OF DRAWINGS

[0014] The above and other objects, features and advantages of the exemplary embodiments of the present application will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which:

[0015] Fig. 1 is a schematic view of the overall structure of the present application;

[0016] Fig. 2 is a schematic view of the positional relationship of the driving mechanism of the present application;

[0017] Fig. 3 is a schematic view of the structure of the driving mechanism of the present application.

[0018] BRIEF DESCRIPTION OF DRAWINGS

[0019] 1. Base plate; 2. Motor; 3. Connecting seat; 4. Connecting rod; 5. Limiting plate; 6. Moving plate; 7. Spring; 8. Clamping plate; 9. Connecting rod; 10. Gear; 11. Tooth plate; 12. Rotating plate; 13. Limiting block; 14. Limiting groove; 15. Slide groove; 16. Telescopic rod. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Those skilled in the art should understand that the embodiments described below are only some, not all, of the embodiments disclosed. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0021] like Figs. 1-3 As shown, the technical solution adopted by this utility model is as follows: A workpiece positioning and clamping device includes a base plate 1, with several clamping components slidably arranged on the top of the base plate 1. This solution has three sets of clamping components, mainly used for clamping triangular prism-shaped workpieces. The base plate 1 is provided with a driving mechanism for driving the several clamping components to limit and slide clamp. Each clamping component has a rotating plate 12 rotatably mounted on it, and each rotating plate 12 is connected to the clamping component via a transmission component.

[0022] The clamping assembly includes slides 15. Three slides 15 are formed on the top of the base plate 1, and a limiting plate 5 is slidably arranged in each slide 15. A limiting block 13 is fixedly arranged on the outer surface of each limiting plate 5, and a limiting groove 14 is formed in each slide 15. The limiting block 13 and the limiting groove 14 are correspondingly slidably engaged. A movable plate 6 is fixedly arranged on the top of each limiting plate 5, and a clamping plate 8 is fixedly arranged on each movable plate 6 by an elastic element.

[0023] The elastic element includes a telescopic rod 16. The telescopic rod 16 is provided between the movable plate 6 and the clamping plate 8. The telescopic rod 16 is arranged along the sliding direction of the limiting plate 5. One end of the telescopic rod 16 is fixedly connected to the clamping plate 8, and the other end is fixedly connected to the movable plate 6. In addition, a spring 7 is sleeved on the outer surface of the telescopic rod 16. One end of the spring 7 is fixedly connected to the clamping plate 8, and the other end is fixedly connected to the movable plate 6.

[0024] The drive mechanism includes a motor 2, which is fixedly installed inside the base plate 1. The output shaft of the motor 2 is fixedly mounted with a connecting seat 3, which has three protrusions and is shaped like a clover. Each protrusion of the connecting seat 3 is hinged to a connecting rod 4. The number of connecting rods 4 and the limiting plates 5 are equal and correspond one-to-one. The end of each connecting rod 4 that is not connected to the protrusion of the connecting seat 3 is hinged to the corresponding limiting plate 5.

[0025] The transmission member comprises a toothed plate 11, a connecting rod 9 is rotationally arranged at the top of each moving plate 6, and a rotating plate 12 is fixedly connected with the connecting rod 9 in one-to-one correspondence. Two ends of each connecting rod 9 are coaxially fixedly provided with a gear 10, and each sliding groove 15 is provided with a toothed plate 11 on both sides, which is fixedly arranged on the top of the bottom plate 1. The gears 10 and the toothed plates 11 are equal in number and in one-to-one correspondence, and each toothed plate 11 is in meshing transmission with the corresponding gear 10 and always keeps the meshing state.

[0026] Working principle: when it is needed to clamp the three-prism-shaped workpiece, the workpiece is vertically placed on the top of the bottom plate 1, so that the workpiece is located in the middle of the three clamping plates 8, and the three planes of the three-prism-shaped workpiece are parallel to the three clamping plates 8 in one-to-one correspondence. Start the motor 2, the output shaft of the motor 2 drives the connecting seat 3 to rotate, the rotation of the connecting seat 3 drives the plurality of connecting rods 4 to rotate around the center axis of the output shaft of the motor 2, so that the limiting plate 5 slides in the sliding groove 15 to approach the position close to the center axis of the output shaft of the motor 2, thereby approaching the workpiece. During the process, the two ends of the connecting rod 4 rotate relatively, and the limiting block 13 slides in the limiting groove 14.

[0027] The sliding of the limiting plate 5 drives the moving plate 6 to slide synchronously, so that the clamping plate 8 is pushed to slide synchronously by the spring 7, thereby clamping and limiting the workpiece in the horizontal direction, and the spring 7 and the telescopic rod 16 can play a good buffering effect.

[0028] At the same time, the sliding of the moving plate 6 also drives the connecting rod 9 to slide synchronously, and under the meshing transmission of the gear 10 and the toothed plate 11, the connecting rod 9 rotates during the sliding process, thereby driving the rotating plate 12 to rotate, and thereby limiting and fixing the workpiece in the vertical direction.

[0029] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or equivalently replace part of the technical features, and any modification, equivalent replacement, improvement, etc. within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A workpiece positioning and clamping device, characterized by, The utility model provides a kind of multi-variety automatic clamping device, including bottom plate (1) and transmission part, the top of the bottom plate (1) is slidably provided with several clamping assemblies, and the bottom plate (1) is provided with driving mechanism for driving several clamping assemblies to limit sliding clamping;Each clamping assembly is rotatably provided with rotating plate (12), and each rotating plate (12) is drivingly connected with the clamping assembly.

2. The workpiece positioning and clamping apparatus of claim 1, wherein, The clamping assembly includes a sliding groove (15), and the top of the bottom plate (1) is provided with several sliding grooves (15), each of which is slidably provided with a limiting plate (5). The outer surface of each limiting plate (5) is fixedly provided with a limiting block (13), and each sliding groove (15) is provided with a limiting groove (14). The limiting block (13) and the limiting groove (14) are in one-to-one limiting sliding cooperation. The top of each limiting plate (5) is fixedly provided with a moving plate (6), and each moving plate (6) is fixedly provided with a clamping plate (8) through an elastic member.

3. The workpiece positioning and clamping apparatus of claim 2, wherein, The elastic member includes a telescopic rod (16), and the telescopic rod (16) is arranged between the moving plate (6) and the clamping plate (8). One end of the telescopic rod (16) is fixedly connected with the clamping plate (8), and the other end is fixedly connected with the moving plate (6). The outer surface of the telescopic rod (16) is sleeved with a spring (7), and one end of the spring (7) is fixedly connected with the clamping plate (8), and the other end is fixedly connected with the moving plate (6).

4. The workpiece positioning and clamping apparatus of claim 2, wherein, The driving mechanism includes a motor (2), and the motor (2) is fixedly installed in the bottom plate (1). The output shaft of the motor (2) is fixedly provided with a connecting seat (3), and the top of the connecting seat (3) is eccentrically hinged with several connecting rods (4). The number of connecting rods (4) and limiting plates (5) is equal and one-to-one corresponding. One end of each connecting rod (4) not connected with the connecting seat (3) is hinged with the corresponding limiting plate (5).

5. The workpiece positioning and clamping apparatus of claim 2 wherein, The transmission part includes a toothed plate (11), and the top of each moving plate (6) is rotatably provided with a connecting rod (9). The rotating plate (12) and the connecting rod (9) are fixedly connected one-to-one. The two ends of each connecting rod (9) are fixedly provided with a gear (10), and the two sides of each sliding groove (15) are fixedly provided with a toothed plate (11). The number of gears (10) and toothed plates (11) is equal and one-to-one corresponding. Each toothed plate (11) is in meshing transmission with the corresponding gear (10) and always keeps the meshing state.

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