An internal clamping device

Abstract

The application relates to the technical field of machining, and specifically discloses an internal clamping device, which comprises a carrier disc, a hollow base is arranged above the carrier disc, three avoiding grooves are arranged in the bottom side wall of the hollow base in a ring array, a lifting disc driven to lift by a lifting rod is arranged in the hollow base, three pressing plates are integrally arranged on the circumferential side of the lifting disc in a ring array and respectively pass through the three avoiding grooves, pressing blocks are respectively arranged outside the hollow base and on the three pressing plates, protrusions are respectively arranged above the three pressing blocks, a three-jaw chuck matched with the three protrusions is arranged above the hollow base, and supporting blocks are arranged on the sides of the three pressing plates. After the castings are placed on the three supporting blocks, the lifting disc can be lifted by the lifting rod to make the three protrusions cooperate with the three clamping claws of the three-jaw chuck to quickly clamp the castings, the clamping difficulty is reduced, and the work efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of machining technology, and in particular to an internal clamping device. Background Technology

[0002] like Figure 1 The casting A shown needs to be drilled or deburred after casting. This requires clamping and fixing. However, due to the irregular shape of the product, it is difficult to clamp it quickly using existing clamping devices, making the operation difficult. To solve the above problems, this application discloses an internal clamping device. Utility Model Content

[0003] To overcome the shortcomings of the prior art, this application discloses an internal clamping device.

[0004] To achieve the above objectives, the technical solution adopted in this application is as follows: an internal clamping device, including a carrier plate, a hollow base above the carrier plate, three clearance slots in a circular array on the bottom side wall of the hollow base, a lifting plate driven by a lifting rod inside the hollow base, three pressure plates integrally arranged in a circular array around the lifting plate passing through the three clearance slots, pressure blocks on the outside of the three pressure plates, and protrusions on the top of the three pressure blocks, a three-jaw chuck on the top of the hollow base that cooperates with the three protrusions, and a support block on the side of the carrier plate beside the three pressure plates.

[0005] More preferably, the lifting rod is the piston rod of a hydraulic cylinder or the lead screw of a lead screw servo stepper motor.

[0006] More preferably, a counterweight is provided on one side of the carrier disk.

[0007] More preferably, an axial positioning block is provided on the other side of the carrier, and a shock-absorbing window is provided above the axial positioning block.

[0008] More preferably, the jaws of the three-jaw chuck are flexible jaws.

[0009] More preferably, the three-jaw chuck has an inverted L-shaped notch at the bottom of its jaws.

[0010] A further preferred embodiment is that the support block has an L-shaped notch on its upper surface.

[0011] This application achieves the following beneficial effects:

[0012] After the casting is placed on the three support blocks, the lifting rod can drive the lifting plate to rise, so that the three protrusions cooperate with the three jaws of the three-jaw chuck to quickly clamp the casting, reducing the clamping difficulty and improving work efficiency.

[0013] Other features and advantages of this application will be set forth in the following description and will be apparent in part from the description, or may be learned by practicing the application. The objectives and other advantages of this application may be realized and obtained by means of the structures shown in the description and the accompanying drawings. Attached Figure Description

[0014] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the disclosure of this application and, together with the specification, serve to explain the principles of this disclosure.

[0015] Figure 1 This is a schematic diagram of the casting disclosed in this application;

[0016] Figure 2 This is a schematic diagram of the overall structure disclosed in this application;

[0017] Figure 3 This is a schematic diagram of the cross-sectional structure disclosed in this application;

[0018] Figure 4 This is a schematic diagram of the structure for clamping castings as disclosed in this application;

[0019] In the diagram: 10, carrier plate; 20, hollow base; 21, clearance groove; 30, lifting plate; 31, pressure plate; 40, lifting rod; 50, pressure block; 60, protrusion; 70, three-jaw chuck; 71, chuck jaw; 711, inverted L-shaped notch; 80, support block; 81, regular L-shaped notch; 90, counterweight block; 100, axial positioning block; 101, vibration damping window; A, casting; A'. Detailed Implementation

[0020] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0021] In the description of this application, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around", etc., which indicate orientation or positional relationship, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the component or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Example

[0022] To address the limitations of existing technologies, such as... Figure 1 The casting AA shown is difficult to clamp quickly, which presents problems.

[0023] refer to Figures 1-4 As shown, this application provides the following solution: an internal clamping device, including a carrier plate 10, a hollow base 20 above the carrier plate 10, three clearance slots 21 arranged in a circular array on the bottom side wall of the hollow base 20, a lifting plate 30 driven to rise and fall by a lifting rod 40 inside the hollow base 20, three pressure plates 31 integrally arranged in a circular array around the periphery of the lifting plate 30 passing through the three clearance slots 21 respectively, and pressure blocks 50 respectively provided on the outside of the hollow base 20 for the three pressure plates 31. The upper part is provided with protrusions 60 respectively. The hollow base 20 is provided with a three-jaw chuck 70 that cooperates with the three protrusions 60. The carrier plate 10 is provided with a support block 80 on the side of the three pressure plates 31. In addition to the above structure, this application also provides a counterweight block 90 on one side of the carrier plate 10 to achieve counterweight, and an axial positioning block 100 is provided on the other side of the carrier plate 10 for axial positioning. A shock-absorbing window 101 is opened above the axial positioning block 100 to achieve shock absorption during the processing of casting A.

[0024] Based on the above structure, in specific implementation, the operator places the casting A to be clamped on the three support blocks 80. Then, the operator controls the lifting rod 40 to raise the lifting plate 30 to the set height and operates the three-jaw chuck 70 so that the three jaws 71 of the three-jaw chuck 70 extend at the same time. In this way, the three protrusions 60 on the three positioning blocks will cooperate with the three jaws 71 of the three-jaw chuck 70 to clamp and fix the casting. Compared with the existing technology, the clamping difficulty is reduced and the work efficiency is improved.

[0025] In some exemplary embodiments, the lifting rod 40 of this application is a piston rod of a hydraulic cylinder or a lead screw of a lead screw servo stepper motor. In addition to the above two types of lifting rods 40, if there are other types of lifting rods 40 that can be used instead, those skilled in the art can make appropriate selections, and no further requirements are made here.

[0026] In some preferred embodiments, the jaws 71 of the three-jaw chuck of this application are flexible jaws 71, which will not damage the casting A when clamping it. In order to accurately press the casting A, this application also provides an inverted L-shaped notch 711 at the bottom of the jaws 71 of the three-jaw chuck. In specific implementation, the inverted L-shaped notches 711 of the three jaws 71 will press together from the inside of the casting A onto the step A' of the casting A.

[0027] In order to achieve precise positioning of casting A, this application also provides an L-shaped notch 81 above the support block 80. In specific implementation, the side of casting A will be pressed against the L-shaped notch 81, so that casting A will not shift during processing.

[0028] In the description of this specification, the references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0029] The above embodiments are only for illustrating the technical concept and features of this application, and are intended to enable those skilled in the art to understand the content of this application and implement it accordingly. They should not be used to limit the scope of protection of this application. All equivalent changes or modifications made in accordance with the spirit and essence of this application should be included within the scope of protection of this application.

Claims

1. An internal clamping device, characterized in that, The device includes a carrier plate (10), a hollow base (20) is provided above the carrier plate (10), and three clearance slots (21) are provided in a ring array on the bottom side wall of the hollow base (20). Inside the hollow base (20) is a lifting plate (30) driven to rise and fall by a lifting rod (40). Three pressure plates (31) are integrally provided in a ring array on the periphery of the lifting plate (30) and pass through the three clearance slots (21) respectively. The three pressure plates (31) are provided with pressure blocks (50) on the outside of the hollow base (20) respectively, and the three pressure blocks (50) are provided with protrusions (60) on the top of the three pressure blocks (50). A three-jaw chuck (70) is provided above the hollow base (20) to cooperate with the three protrusions (60). The carrier plate (10) is provided with a support block (80) on the side of the three pressure plates (31).

2. The internal clamping device according to claim 1, characterized in that, The lifting rod (40) is either the piston rod of a hydraulic cylinder or the lead screw of a lead screw servo stepper motor.

3. The internal clamping device according to claim 1, characterized in that, A counterweight (90) is provided on one side of the carrier plate (10).

4. The internal clamping device according to claim 1, characterized in that, An axial positioning block (100) is provided on the other side of the carrier (10), and a shock-absorbing window (101) is provided above the axial positioning block (100).

5. An internal clamping device according to claim 1, characterized in that, The jaws (71) of the three-jaw chuck are flexible jaws (71).

6. The internal clamping device according to claim 1, characterized in that, The three-jaw chuck has an inverted L-shaped notch (711) at the bottom of the jaw (71).

7. An internal clamping device according to claim 1, characterized in that, The support block (80) has an L-shaped notch (81) on its upper part.

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