Pneumatic hydraulic pull-down clamping centering clamp

Abstract

The utility model provides a pneumatic hydraulic pull-down clamping centering clamp. The pneumatic hydraulic pull-down clamping centering clamp is characterized in that a through hole is formed in a cylinder body; the piston is arranged in the through hole and is provided with a plurality of circles of step parts; the multi-circle step part and the inner wall of the through hole form a first cavity and a second cavity; a first air inlet and outlet and a second air inlet and outlet are further formed in the cylinder body, the first air inlet and outlet is connected with the first cavity, and the second air inlet and outlet is connected with the second cavity; the two guide columns are connected to the two sides of the cylinder body in a sliding mode, and the two guide columns are symmetrically arranged along the cross section of the cylinder body. The piston is connected with two guide columns located on the two sides of the piston through connecting columns. Each clamping clamp is arranged at the tail end of the corresponding guide column. The first cavity and the second cavity are formed by the multiple circles of step portions of the piston and the inner wall of the cylinder body, inflow and outflow of liquid or gas media can be accurately controlled through the air inlet and outlet holes, and therefore axial movement of the piston and the guide column is accurately controlled.

Description

Technical Field

[0001] The utility model belongs to the technical field of pneumatic hydraulic clamps, and more specifically, relates to the technical field of pneumatic hydraulic pull-down clamping and centering pliers. Background Art

[0002] Although some technical progress has been made in the existing pneumatic and hydraulic clamp designs, there are still many challenges in the clamping and centering of workpieces. In particular, for workpieces with complex shapes and varying sizes, traditional clamp designs often have difficulty in providing stable and precise clamping effects. This results in the workpiece being easily offset or shaken during processing, which in turn affects processing quality and efficiency.

[0003] In addition, traditional pneumatic and hydraulic clamps also have many inconveniences during operation. For example, the adjustment of the clamping force often needs to be done manually, which not only increases the difficulty of operation, but also reduces production efficiency. At the same time, for workpieces of different sizes and weights, traditional clamps may have difficulty in providing sufficient clamping force, resulting in unstable clamping or damage to the workpiece. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide a pneumatic hydraulic pull-down clamping and centering pliers to solve the technical problem of the difficulty in accurately controlling the axial movement of the guide column in the prior art.

[0005] To achieve the above purpose, the technical solution adopted in this application is: a pneumatic hydraulic pull-down clamping and centering pliers, comprising:

[0006] A cylinder body, wherein a through hole is arranged in the cylinder body;

[0007] A piston, the piston is arranged in the through hole, the piston is provided with a plurality of steps; the plurality of steps and the inner wall of the through hole form a first cavity and a second cavity; the cylinder body is further provided with a first air inlet and outlet hole and a second air inlet and outlet hole, the first air inlet and outlet hole is connected to the first cavity, and the second air inlet and outlet hole is connected to the second cavity;

[0008] Two guide posts, the two guide posts are slidably connected to two sides of the cylinder body, and the two guide posts are symmetrically arranged along the cross section of the cylinder body;

[0009] A connecting column, through which the piston is connected to the two guide columns located on both sides thereof;

[0010] Two clamps, each of which is disposed at the end of each guide post.

[0011] Optionally, the first air inlet and outlet holes include a first air inlet hole and a first air outlet hole; the first air outlet hole penetrates from the upper side of the cylinder body to the through hole, and the first air inlet hole penetrates from the rear end surface of the cylinder body to the first air outlet hole.

[0012] Optionally, the second air inlet and outlet holes include a second air inlet hole and a second air outlet hole; the second air outlet hole penetrates from the lower side of the cylinder body to the through hole, and the second air inlet hole penetrates from the rear end surface of the cylinder body to the second air outlet hole.

[0013] Optionally, a step portion is provided on the front side of the through hole, and a fixing plate is fixedly mounted on the step portion.

[0014] Optionally, a workpiece placement seat is installed on the fixed plate.

[0015] Optionally, a clamping block is provided on both the upper and lower sides of the workpiece placement seat, and the two clamping blocks press the upper and lower sides of the workpiece.

[0016] Optionally, the embedding block includes a fixing rod and supporting rods on both sides thereof; the two ends of the fixing rod are respectively connected to one end of the supporting rod; the supporting rod and the fixing rod are perpendicular to each other; a protruding structure is provided on a side of the supporting rod facing the workpiece.

[0017] Optionally, each guide column is arranged to be inclined from inside to outside.

[0018] Optionally, each guide column is provided with a through hole for connecting the connecting column at one end close to the cylinder body.

[0019] The beneficial effect of the pneumatic hydraulic pull-down clamping and centering pliers provided in the present application is that: compared with the prior art, the utility model provides a pneumatic hydraulic pull-down clamping and centering pliers. The utility model forms a first cavity and a second cavity through the multi-circle step portion of the piston and the inner wall of the cylinder body, and then accurately controls the inflow and outflow of liquid or gaseous media through the inlet and outlet holes, thereby accurately controlling the axial movement of the piston and the guide column.

[0020] In addition, the inclined setting of the guide column of the utility model enables the two clamping pliers to move toward each other synchronously, thereby improving the efficiency and synchronization of the clamping action. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] Figure 1A three-dimensional view of an angle of a pneumatic hydraulic pull-down clamping and centering pliers provided in an embodiment of the present application;

[0023] Figure 2 for Figure 1 Enlarged view of C;

[0024] Figure 3 A rear view of a pneumatic hydraulic pull-down clamping and centering pliers provided in an embodiment of the present application;

[0025] Figure 4 A cross-sectional view taken along line AA of a pneumatic hydraulic pull-down clamping and centering pliers provided in an embodiment of the present application;

[0026] Figure 5 A front view of a pneumatic hydraulic pull-down clamping and centering pliers provided in an embodiment of the present application;

[0027] Figure 6 A cross-sectional view of a BB of a pneumatic hydraulic pull-down clamping and centering pliers provided in an embodiment of the present application;

[0028] Figure 7 A three-dimensional diagram of a piston, a connecting column, a guide column, a clamping pliers and a fixing plate of a pneumatic hydraulic pull-down clamping and centering pliers provided in an embodiment of the present application;

[0029] Figure 8 A three-dimensional diagram of a piston, a connecting column, a guide column, a clamping pliers, a fixing plate and a workpiece placement seat of a pneumatic hydraulic pull-down clamping and centering pliers provided in an embodiment of the present application.

[0030] Among them, the reference numerals in the figure are:

[0031] 1. Cylinder body; 11. Through hole; 111. Step portion; 12. First air inlet and outlet hole; 13. Second air inlet and outlet hole; 2. Piston; 21. Multi-turn step portion; 22. First cavity; 23. Second cavity; 3. Guide column; 4. Connecting column; 5. Clamping pliers; 6. Workpiece; 7. Fixed plate; 71. Workpiece placement seat; 72. Embedding block; 721. Fixed rod; 722. Support rod; 723. Protruding structure. DETAILED DESCRIPTION

[0032] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0033] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0034] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0035] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0036] Please also read Figures 1 to 8 , now a pneumatic hydraulic pull-down clamping and centering pliers provided in an embodiment of the present application includes:

[0037] A cylinder body 1, wherein a through hole 11 is provided in the cylinder body 1;

[0038] The piston 2 is arranged in the through hole 11, and the piston 2 has a multi-circle step portion 21; the multi-circle step portion 21 and the inner wall of the through hole 11 form a first cavity 22 and a second cavity 23; the cylinder body 1 is also provided with a first air inlet and outlet hole 12 and a second air inlet and outlet hole 13, the first air inlet and outlet hole 12 is connected to the first cavity 22, and the second air inlet and outlet hole 13 is connected to the second cavity 23;

[0039] Two guide posts 3, the two guide posts 3 are slidably connected to the two sides of the cylinder body 1; the two guide posts 3 are symmetrically arranged along the cross section of the cylinder body 1, and each guide post 3 intersects with the cross section of the cylinder body 1;

[0040] A connecting column 4, the connecting column 4 passes through the piston 2, and the connecting column 4 connects two guide columns 3 located on both sides of the piston 2 with the piston 2;

[0041] Two clamps 5 are provided at the end of each guide column 3 .

[0042] The utility model provides a pneumatic hydraulic pull-down clamping and centering pliers, compared with the prior art,

[0043] The piston 2 of the utility model is provided with a plurality of steps 21, and these steps 21 and the inner wall of the cylinder body 1 form a first cavity 22 and a second cavity 23. This design allows the first cavity 22 and the second cavity 23 to flow in and out of the liquid medium through the corresponding inlet and outlet holes respectively when the piston 2 moves, thereby controlling the axial movement of the piston 2, and then controlling the axial movement of the guide column 3, and finally achieving control of the clamping action of the clamp 5, and achieving centering and clamping of the workpiece 6.

[0044] In another embodiment of the present application, please refer to Figure 4 and 6 , the first air inlet and outlet 12 includes a first air inlet 121 and a first air outlet 122; the first air outlet 122 is connected from the upper side of the cylinder body 1 to the through hole 11, and the first air inlet 121 is connected from the rear end face of the cylinder body 1 to the first air outlet 122. The user can plug the first air inlet 121 and the first air outlet 122 respectively through two air pipes; the first air outlet 122 is connected from the upper side of the cylinder body 1 to the through hole 11, and is directly connected to the first cavity 22. Such a design allows the gas to flow smoothly out of the first cavity 22 from the first air outlet 122; on the other hand, the first air inlet 121 is connected from the rear end face of the cylinder body 1 to the first air outlet 122. This design of introducing air from the rear end face makes the connection of the air pipe more convenient, and also provides more operating space for the user. The user can plug the first air inlet 121 and the first air outlet 122 respectively through two air pipes, thereby realizing the circulation of gas. When more gas flows into the first cavity 22, the volume of the first cavity 22 increases, thereby pushing the piston 2 to move backward, and vice versa.

[0045] In another embodiment of the present application, please refer to Figure 4 and 6 , the second air inlet and outlet 13 includes a second air inlet 131 and a second air outlet 132; the second air outlet 132 is connected from the lower side of the cylinder body 1 to the through hole 11, and the second air inlet 131 is connected from the rear end face of the cylinder body 1 to the second air outlet 132. Similar to the first air inlet and outlet 12, the second air outlet 132 is connected from the lower side of the cylinder body 1 to the through hole 11 and connected to the second cavity 23, so that the gas can flow out of the first cavity 22 smoothly from the second air outlet 132; on the other hand, the second air inlet 131 is connected from the rear end face of the cylinder body 1 to the second air outlet 132. This design of introducing air from the rear end face makes the connection of the air pipe more convenient, and also provides more operating space for the user. The user can respectively plug the second air inlet 131 and the second air outlet 132 through two air pipes to achieve the circulation of gas. When more gas flows into the second chamber 23, the volume of the second chamber 23 increases, thereby pushing the piston 2 to move toward the front side, and vice versa.

[0046] It can be seen from the above two embodiments that in order to avoid improper advancement and retreat of the piston 2, it is necessary to synchronize the first air inlet 121 and the second air outlet 132, and synchronize the first air outlet 122 and the second air inlet 131, so that the front-to-back movement of the piston 2 is smoother.

[0047] In another embodiment of the present application, please refer to Figure 4 , a step portion 111 is provided on the front side of the through hole 11, and a fixing plate 7 is fixedly installed on the step portion 111. This step portion 111 not only adds a sense of structural hierarchy to the cylinder body 1, but more importantly, it provides a platform for fixing and installing other components. On this step portion 111, we fixedly installed a fixing plate 7. The material and shape of the fixing plate 7 can be selected and designed according to actual needs to ensure its stability and durability. Through a specific fixing method (such as bolt connection, welding, etc.), the fixing plate 7 is firmly mounted on the step portion 111 to form an integral structure.

[0048] In another embodiment of the present application, please refer to Figure 6 and 7 , a workpiece placement seat 71 is installed on the fixed plate 7. The shape and size of the workpiece placement seat 71 can be customized as needed to adapt to workpieces of different shapes and sizes. Its surface can be specially treated to increase the friction between it and the workpiece, ensuring that the workpiece can remain stable after being placed and is not easy to slide or shift. Therefore, when it is necessary to fix workpieces 6 of different shapes, it is only necessary to replace the workpiece placement seat 71 of the corresponding shape; the workpiece placement seat 71 can also be firmly installed on the fixed plate 7 by a specific fixing method (such as bolt connection, welding, etc.).

[0049] In another embodiment of the present application, please refer to Figure 1 and 2 , a clamping block 72 is provided on both the upper and lower sides of the workpiece placement seat 71, and the two clamping blocks 72 press against the upper and lower sides of the workpiece 6. The two clamping blocks 72 are specifically used to press against the upper and lower sides of the workpiece 6. This design allows the workpiece to be more evenly stressed when the clamping force of the two clamps 5 is applied, thereby preventing the workpiece 6 from shifting or deforming during the clamping process. Specifically, when the workpiece 6 is placed on the workpiece placement seat 71, the upper clamping block 72 will press downward against the upper surface of the workpiece, while the lower clamping block 72 will press upward against the lower surface of the workpiece 6. In this way, the workpiece is firmly clamped between the two clamping blocks 72, achieving stable clamping of the workpiece 6.

[0050] In another embodiment of the present application, please refer to Figure 2The clamping block 72 includes a fixing rod 721 and supporting rods 722 on both sides thereof; the fixing rod 721 is fixed to the side of the workpiece placement seat 71; the two ends of the fixing rod 721 are respectively connected to one end of the supporting rod 722; the supporting rod 722 and the fixing rod 721 are perpendicular to each other; a protruding structure 723 is provided on the side of the supporting rod 722 facing the workpiece 6. The fixing rod 721 is firmly fixed to the side of the workpiece placement seat 71 to ensure that the clamping block 72 will not shift or shake during operation. Figure 2 As shown, it can be seen that the side of the support rod 722 will be close to the side of the workpiece 6, thereby limiting the workpiece 6 and preventing the workpiece 6 from slipping off the upper and lower sides of the workpiece placement seat 71; the protruding structure 723 can prevent the workpiece 6 from slipping off the front side of the workpiece placement seat 71.

[0051] In another embodiment of the present application, please refer to Figure 7 Each guide column 3 is tilted from the inside (the cross section of the cylinder body 1 is the inside) to the outside. Therefore, when the two guide columns 3 move, the two clamping pliers 5 can be driven to move toward each other synchronously to achieve the clamping action.

[0052] In another embodiment of the present application, please refer to Figure 7 , a through hole for setting the connecting column 4 is provided at one end of each guide column 3 close to the cylinder body 1. By providing the through hole, it is convenient to connect the connecting column 4 with the guide column 3; in the connection process, it is preferably adopted the interference fit method. Interference fit is a fitting method that uses the interference between two parts to achieve the purpose of fastening and positioning. By inserting the connecting column 4 into the through hole of the guide column 3, the principle of interference fit is used to form a tight and stable connection between the connecting column 4 and the guide column 3. This connection method is not only easy to operate, but also has a stable and reliable connection effect. It can effectively ensure that the connection between the guide column 3 and the connecting column 4 is firm and not easy to loosen or fall off. At the same time, the interference fit method can also provide a certain pre-tightening force, making the connection tighter and improving the stability and reliability of the entire structure.

[0053] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A pneumatic hydraulic pull-down clamping and centering pliers, characterized in that: include: A cylinder body, wherein a through hole is arranged in the cylinder body; A piston, the piston is arranged in the through hole, the piston is provided with a plurality of steps; the plurality of steps and the inner wall of the through hole form a first cavity and a second cavity; the cylinder body is further provided with a first air inlet and outlet hole and a second air inlet and outlet hole, the first air inlet and outlet hole is connected to the first cavity, and the second air inlet and outlet hole is connected to the second cavity; Two guide posts, the two guide posts are slidably connected to two sides of the cylinder body, and the two guide posts are symmetrically arranged along the cross section of the cylinder body; A connecting column, through which the piston is connected to the two guide columns located on both sides thereof; Two clamps, each of which is disposed at the end of each guide post.

2. A pneumatic hydraulic pull-down clamping and centering pliers as claimed in claim 1, characterized in that: The first air inlet and outlet holes include a first air inlet hole and a first air outlet hole; the first air outlet hole penetrates from the upper side of the cylinder body to the through hole, and the first air inlet hole penetrates from the rear end surface of the cylinder body to the first air outlet hole.

3. A pneumatic hydraulic pull-down clamping and centering pliers as claimed in claim 1, characterized in that: The second air inlet and outlet holes include a second air inlet hole and a second air outlet hole; the second air outlet hole penetrates from the lower side of the cylinder body to the through hole, and the second air inlet hole penetrates from the rear end surface of the cylinder body to the second air outlet hole.

4. A pneumatic hydraulic pull-down clamping and centering pliers as claimed in claim 1, characterized in that: A step portion is provided at the front side of the through hole, and a fixing plate is fixedly mounted on the step portion.

5. A pneumatic hydraulic pull-down clamping and centering pliers as claimed in claim 4, characterized in that: A workpiece placement seat is installed on the fixed plate.

6. A pneumatic hydraulic pull-down clamping and centering pliers as claimed in claim 5, characterized in that: A clamping block is provided on both the upper and lower sides of the workpiece placement seat, and the two clamping blocks press the upper and lower sides of the workpiece.

7. A pneumatic hydraulic pull-down clamping and centering pliers as claimed in claim 6, characterized in that: The embedding block comprises a fixing rod and supporting rods on both sides thereof; the two ends of the fixing rod are respectively connected to one end of the supporting rod; the supporting rod and the fixing rod are perpendicular; a protruding structure is provided on a side of the supporting rod facing the workpiece.

8. The pneumatic hydraulic pull-down clamping and centering pliers according to claim 1, characterized in that: Each guide column is arranged to be inclined from inside to outside.

9. The pneumatic hydraulic pull-down clamping and centering pliers according to claim 1, characterized in that: A through hole for connecting the connecting column is provided at one end of each guide column close to the cylinder body.

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