Miniature clamping jaw structure suitable for grabbing rod-shaped objects

Abstract

The miniature clamping jaw structure comprises a mounting seat, a piston assembly, a rod-shaped clamping jaw and a clamping cylinder, the mounting seat comprises an upper seat, a connecting seat and a bottom plate which are fixedly connected in sequence, the connecting seat is provided with a piston cavity and a lower air passage, an upper air passage is arranged in the upper seat and communicated with the piston cavity, and the lower air passage is communicated with the piston cavity. The lower end of the piston cavity communicates with the lower air duct; the piston assembly comprises a piston rod and a piston, the piston is located in the piston cavity, the piston rod penetrates through the lower air duct and is fixedly connected with the upper end of the rod-shaped clamping jaw, the clamping cylinder is fixedly installed on the bottom plate, and an opening in the lower end of the clamping cylinder is a necking opening with the wide upper portion and the narrow lower portion. The lower end of the rod-shaped clamping jaw is composed of a plurality of clamping pieces arranged at intervals in the circumferential direction. And after the clamping pieces of the rod-shaped clamping jaw enter the necking opening, clamping force is formed among the multiple clamping pieces to clamp the rod-shaped object. According to the utility model, the rod-shaped object is clamped in a manner that the plurality of clamping pieces are circumferentially held, the structure is simple, the cost is low, the size is small, and the clamping device is more suitable for equipment with limited size.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical devices, in particular to a micro-claw structure suitable for grasping rod-shaped objects. Background Art

[0002] The production and processing of products inevitably involves the grasping and moving of products. For long rod-shaped objects, the existing clamps generally use the left and right petals to clamp them. It is difficult to grasp rod-shaped objects with smaller diameters, and the scope of use is limited. In addition, the grasping device is relatively large in size and difficult to install in a small space, further limiting its scope of use.

[0003] The purpose of the utility model is to provide a micro-grip structure suitable for grasping rod-shaped objects and capable of overcoming the above disadvantages. Utility Model Content

[0004] The main technical problem solved by the utility model is to provide a micro-grip structure suitable for grasping rod-shaped objects. The rod-shaped objects are clamped by a plurality of clamping plates in a circumferential clamping manner. The structure is simple, the cost is low, the volume is small, and it is more suitable for use on equipment with limited volume.

[0005] In order to solve the above technical problems, a technical solution adopted by the utility model is: to provide a micro-gripper structure suitable for grasping rod-shaped objects, including a mounting seat, a piston assembly, a rod-shaped clamp and a clamping tube, the mounting seat includes an upper seat, a connecting seat and a bottom plate which are fixedly connected in sequence, the connecting seat is provided with a piston cavity and a lower air passage, the upper seat is provided with an upper air passage inside, the upper air passage is communicated with the piston cavity, and the lower end of the piston cavity is communicated with the lower air passage;

[0006] The piston assembly includes a piston rod and a piston located at the top of the piston rod, the piston is located in the piston cavity, the piston rod passes through the lower air duct and is fixedly connected to the upper end of the rod-shaped clamp, the clamp is fixedly installed on the base plate, and the opening of the lower end of the clamp is a narrow opening that is wide at the top and narrow at the bottom; the lower end of the rod-shaped clamp is composed of a plurality of clamping plates arranged at circumferential intervals; when the clamping plates of the rod-shaped clamp enter the narrow opening, a clamping force is formed between the plurality of clamping plates to clamp the rod-shaped object.

[0007] Furthermore, the upper air duct is connected to the upper joint; the lower air duct is connected to the lower joint.

[0008] Furthermore, a flange is formed upward on the inner bottom surface of the connecting seat, and the lower air passage is formed between the flange and the inner wall surface of the connecting seat, and the upper surface of the flange forms a lower limit for the axial movement of the piston;

[0009] The diameter of the upper air passage is smaller than the diameter of the piston cavity, and the bottom surface of the upper seat forms a lower limit for the axial movement of the piston.

[0010] Furthermore, a first sealing ring is provided between the piston and the piston chamber, and a second sealing ring is provided between the piston rod and the lower air passage;

[0011] A third sealing ring is provided between the upper end surface of the connecting seat and the bottom surface of the upper seat, and a fourth sealing ring is provided between the lower end surface of the connecting seat and the top surface of the bottom plate.

[0012] Furthermore, the upper seat and the connecting seat as well as the connecting seat and the bottom plate are fixedly connected by a fastener.

[0013] Furthermore, the lower end of the rod-shaped clamping jaw is provided with a plurality of axially extending strip-shaped slots to form a plurality of the clamping pieces.

[0014] Furthermore, the outer surface of the lower end of the clamping sheet is a first arc-shaped surface that is wider at the top and narrower at the bottom; the upper end of the opening of the clamping barrel also has a second arc-shaped surface that matches the first arc-shaped surface.

[0015] The beneficial effects of the utility model are:

[0016] The utility model comprises a mounting seat, a piston assembly, a rod-shaped clamp and a clamping sleeve. The mounting seat comprises an upper seat, a connecting seat and a bottom plate which are fixedly connected in sequence. The connecting seat is provided with a piston cavity and a lower air passage. An upper air passage is provided inside the upper seat, the upper air passage is communicated with the piston cavity, and the lower end of the piston cavity is communicated with the lower air passage. The piston assembly comprises a piston rod and a position piston. The opening at the lower end of the clamping sleeve is a narrow opening which is wide at the top and narrow at the bottom. The lower end of the rod-shaped clamp is composed of a plurality of clamping sheets arranged at circumferential intervals. When external gas acts on the piston through the upper air passage so that the clamping sheets of the rod-shaped clamp enter the narrow opening, a clamping force is formed between the plurality of clamping sheets to clamp the rod-shaped object. When external gas enters through the lower air passage, the piston is pushed to move upward, so that the plurality of clamping sheets are moved upward to release the rod-shaped object. Therefore, the utility model clamps the rod-shaped object by pushing the piston to move and then driving multiple clamping plates to clamp circumferentially. It has a simple structure, low cost, and small size, and is more suitable for equipment with limited volume. Moreover, multiple clamping plates simultaneously disperse the force circumferentially, which makes the clamping more secure and prevents the rod-shaped object from falling. At the same time, the force is evenly applied, and the rod-shaped object is not easily damaged.

[0017] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the utility model in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1It is the appearance diagram of the utility model;

[0019] Figure 2 It is one of the axial cross-sectional views of the utility model;

[0020] Figure 3 This is the second axial cross-sectional view of the utility model;

[0021] Figure 4 It is a schematic diagram of the exploded structure of the utility model;

[0022] The parts in the accompanying drawings are marked as follows:

[0023] Piston assembly 1, piston rod 11, piston 12, rod-shaped clamping jaw 2, clamping plate 21, first arcuate surface 211, strip groove 22, clamping sleeve 3, second arcuate surface 31, upper seat 41, upper air duct 411, connecting seat 42, piston chamber 421, lower air duct 422, flange 423, bottom plate 43, upper joint 5, lower joint 6, first sealing ring 7, second sealing ring 8, third sealing ring 9, fourth sealing ring 10. DETAILED DESCRIPTION

[0024] The following is a specific embodiment of the present invention, and those skilled in the art can easily understand the advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented in other different ways, that is, different modifications and changes can be made without departing from the scope disclosed by the present invention.

[0025] The position descriptions such as up, down, left, and right in this embodiment are based on the orientations in the drawings and have no special meanings and are not used to limit the protection scope of the present utility model.

[0026] Embodiment: A micro-gripper structure suitable for grasping a rod-shaped object, such as Figures 1 to 4 As shown, it includes a mounting seat, a piston assembly 1, a rod-shaped clamping jaw 2 and a clamping barrel 3, the mounting seat includes an upper seat 41, a connecting seat 42 and a bottom plate 43 which are fixedly connected in sequence, the connecting seat is provided with a piston cavity 421 and a lower air passage 422, an upper air passage 411 is provided inside the upper seat, the upper air passage is communicated with the piston cavity, and the lower end of the piston cavity is communicated with the lower air passage;

[0027] The piston assembly 1 includes a piston rod 11 and a piston 12 located at the top of the piston rod, the piston is located in the piston cavity, the piston rod passes through the lower air duct and is fixedly connected to the upper end of the rod-shaped clamp, the clamp is fixedly installed on the base plate, and the opening of the lower end of the clamp is a narrow opening that is wide at the top and narrow at the bottom; the lower end of the rod-shaped clamp is composed of a plurality of clamping plates 21 arranged at circumferential intervals; when the clamping plates of the rod-shaped clamp enter the narrow opening, a clamping force is formed between the plurality of clamping plates to clamp the rod-shaped object.

[0028] A mounting hole can be provided on the upper seat, and the clamping claw structure can be mounted on a driving mechanism (such as a manipulator), and driven by the driving mechanism to grab the rod-shaped object (or workpiece) to be grabbed.

[0029] In this embodiment, the upper air duct is connected to the upper joint 5 ; the lower air duct is connected to the lower joint 6 .

[0030] In this embodiment, a flange 423 is formed upward on the inner bottom surface of the connecting seat, and the lower air passage is formed between the flange and the inner wall surface of the connecting seat. The upper surface of the flange forms a lower limit for the axial movement of the piston.

[0031] The diameter of the upper air passage is smaller than the diameter of the piston cavity, and the bottom surface of the upper seat forms a lower limit for the axial movement of the piston.

[0032] In this embodiment, a first sealing ring 7 is provided between the piston and the piston chamber, and a second sealing ring 8 is provided between the piston rod and the lower air passage;

[0033] A third sealing ring 9 is provided between the upper end surface of the connecting seat and the bottom surface of the upper seat, and a fourth sealing ring 10 is provided between the lower end surface of the connecting seat and the top surface of the bottom plate.

[0034] The above-mentioned multiple sealing rings are used to ensure the sealing effect of the entire clamping jaw structure to avoid air leakage, etc.

[0035] In this embodiment, the upper seat and the connecting seat, as well as the connecting seat and the bottom plate are fixedly connected by a fixing member. This part of the structure belongs to a common mechanical connection method and is not shown in the figure.

[0036] In this embodiment, a plurality of the clamping pieces are formed by providing a plurality of axially extending strip-shaped slots 22 at the lower end of the rod-shaped clamping jaw.

[0037] In this embodiment, the outer surface of the lower end of the clamping piece is a first arc-shaped surface 211 which is wide at the top and narrow at the bottom; the upper end of the opening of the clamping tube also has a second arc-shaped surface 31 which matches the first arc-shaped surface. When the clamping piece moves downward into the necking of the jacket, it plays a guiding role, so that the clamping piece can enter the necking more smoothly so as to be clamped by the necking.

[0038] The working principle and working process of this utility model:

[0039] When it is necessary to clamp a rod-shaped object, the clamping jaw structure is driven into place through other driving mechanisms, that is, the rod-shaped object is inserted into the inside of the clamping jaw, and then air is ventilated from the upper joint to push the piston downward. The piston can move downward until it is supported by the upper end face of the flange. Since the upper end of the clamping jaw is fixed to the end of the piston rod, it will drive the clamping jaw to move downward, and then the shrinkage at the lower end of the sleeve will tighten multiple clamping plates to clamp the rod-shaped object, and then move it to the required position, and then ventilate from the lower joint to push the piston up until the upper end face of the piston is supported by the lower end face of the upper seat. During this process, the clamping plate at the lower end of the clamping jaw moves upward and is no longer clamped by the shrinkage at the lower end of the sleeve, and will be in a loosened state, and the rod-shaped object is loosened.

[0040] The above description is only an embodiment of the present utility model, and does not limit the patent scope of the present utility model. Any equivalent structure made using the contents of the specification and drawings of the present utility model, or directly or indirectly used in other related technical fields, is also included in the patent protection scope of the present utility model.

Claims

1. A micro-gripper structure suitable for grasping a rod-shaped object, characterized in that: The invention comprises a mounting seat, a piston assembly (1), a rod-shaped clamping jaw (2) and a clamping barrel (3), wherein the mounting seat comprises an upper seat (41), a connecting seat (42) and a bottom plate (43) which are fixedly connected in sequence, the connecting seat is provided with a piston cavity (421) and a lower air passage (422), an upper air passage (411) is provided inside the upper seat, the upper air passage is communicated with the piston cavity, and the lower end of the piston cavity is communicated with the lower air passage; The piston assembly (1) comprises a piston rod (11) and a piston (12) located at the top of the piston rod, wherein the piston is located in the piston cavity, the piston rod passes through the lower air passage and is fixedly connected to the upper end of the rod-shaped clamp, the clamp is fixedly mounted on the base plate, and the opening at the lower end of the clamp is a narrow opening that is wider at the top and narrower at the bottom; the lower end of the rod-shaped clamp is composed of a plurality of clamping plates (21) arranged at circumferential intervals; when the clamping plates of the rod-shaped clamp enter the narrow opening, a clamping force is formed between the plurality of clamping plates to clamp the rod-shaped object.

2. The micro-gripper structure suitable for grasping a rod-shaped object according to claim 1, characterized in that: The upper air duct is connected to the upper joint (5); and the lower air duct is connected to the lower joint (6).

3. The micro-gripper structure suitable for grasping a rod-shaped object according to claim 1, characterized in that: The inner bottom surface of the connecting seat is upwardly formed with a flange (423), the lower air passage is formed between the flange and the inner wall surface of the connecting seat, and the upper surface of the flange forms a lower limit for the axial movement of the piston; The diameter of the upper air passage is smaller than the diameter of the piston cavity, and the bottom surface of the upper seat forms a lower limit for the axial movement of the piston.

4. The micro-gripper structure suitable for grasping a rod-shaped object according to claim 1, characterized in that: A first sealing ring (7) is provided between the piston and the piston chamber, and a second sealing ring (8) is provided between the piston rod and the lower air passage; A third sealing ring (9) is provided between the upper end surface of the connecting seat and the bottom surface of the upper seat, and a fourth sealing ring (10) is provided between the lower end surface of the connecting seat and the top surface of the bottom plate.

5. The micro-gripper structure suitable for grasping a rod-shaped object according to claim 1, characterized in that: The upper seat and the connecting seat as well as the connecting seat and the bottom plate are fixedly connected by a fastener.

6. The micro-gripper structure suitable for grasping a rod-shaped object according to claim 1, characterized in that: The lower end of the rod-shaped clamping jaw is provided with a plurality of axially extending strip-shaped slots (22) to form a plurality of clamping pieces.

7. The micro-gripper structure suitable for grasping a rod-shaped object according to claim 1, characterized in that: The outer surface of the lower end of the clamping sheet is a first arc-shaped surface (211) that is wider at the top and narrower at the bottom; the upper end of the opening of the clamping tube also has a second arc-shaped surface (31) that matches the first arc-shaped surface.

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