Force-multiplying air cylinder for pneumatic vice

Abstract

The utility model discloses a force-multiplying air cylinder for a pneumatic vice, which comprises a force-increasing air cylinder, and an oval piston is arranged in the force-increasing air cylinder. By arranging the oval piston and increasing the acting force of the air cylinder, the clamping force of the pneumatic vice is larger, the requirement of heavy clamping can be met, the clamping force of the pneumatic vice is improved, and the production requirement of workpieces needing heavy clamping can be met.

Description

Technical Field

[0001] The utility model relates to the technical field of cylinders, in particular to a double-acting cylinder for a pneumatic vise. Background Art

[0002] A cylinder is a common driving device. However, the existing cylinders have the following defects:

[0003] First: In order to obtain sufficient thrust, the existing cylinders will increase the cylinder diameter to achieve it. However, increasing the cylinder diameter will inevitably lead to an increase in the size of the cylinder;

[0004] Second: The thrust adjustment range of the cylinder is small. It can meet the clamping of workpieces under high force conditions, but it will still deform the workpieces under low force conditions. Now, take an example to illustrate: Taking a cylinder with a cylinder diameter of 200 mm as an example, the working air pressure of the cylinder is generally 0.2 MPA - 0.5 MPA (too high air pressure will be unstable). Therefore, the output thrust of the cylinder is (6280 - 15700 N). In this case, the maximum output thrust is about 2.5 times the minimum thrust. In actual applications, it is found that the thrust adjustment range is too small to meet the requirements. The following is illustrated by an example:

[0005] There are various situations when clamping workpieces with a vise in a CNC machining center:

[0006] First: When roughing the workpiece, the tool feed rate is large, and sufficient clamping force is required;

[0007] Second: When finishing the workpiece, the tool feed rate is small. It is required that the clamping force is sufficient without scratching the surface of the workpiece and without deforming the workpiece:

[0008] Third: When the workpiece to be machined is aluminum profile or plastic, a smaller clamping force is required;

[0009] Fourth, when the workpiece to be machined is steel, a larger clamping force is required;

[0010] Therefore, there is an urgent need for a new type of cylinder to solve the above problems. Summary of the Invention

[0011] The purpose of the utility model is to provide a double-acting cylinder for a pneumatic vise to solve the problems raised in the above background art. To achieve the above purpose, the utility model provides the following technical solutions:

[0012] A double-acting cylinder for a pneumatic vise includes an intensifying cylinder, and an oval piston is arranged inside the intensifying cylinder;

[0013] Further, it further includes a thrust cylinder, and a thrust piston is arranged inside the thrust cylinder; a piston rod is fixedly connected between the thrust piston and the oval piston; the thrust piston and the oval piston are separated by a piston spacer sleeve;

[0014] Further, it further includes a cylinder connection cover, and a piston hole is provided in the middle of the cylinder connection cover;

[0015] Further, it further includes a connecting rod sleeve, pin holes are provided at both ends of the connecting rod sleeve, a pin hole is also provided at the front end of the piston rod, the piston rod passes through the piston hole and is connected to the connecting rod sleeve by inserting a piston rod pin into the pin hole;

[0016] Further, it further includes a screw rod pin, a pneumatic vise screw rod, and the pneumatic vise screw rod and the connecting rod sleeve are connected by the screw rod pin;

[0017] Further, the pneumatic vise screw rod and the connecting rod sleeve are provided with matching annular grooves, and can rotate freely through the annular grooves;

[0018] Further, a compression nut is connected to the rear end of the piston rod.

[0019] The beneficial effects of the present utility model are as follows: First, by setting an oval piston, the acting force of the cylinder is increased, so that when the clamping force of the pneumatic vise is greater, the requirement of heavy clamping can be met, and the production requirements of workpieces that need heavy clamping can be satisfied; and the height of the cylinder itself is smaller, and the space occupied inside the processing equipment is smaller; Second, in the multiple-force cylinder, there are two different working modes in which the thrust cylinder works alone or the thrust cylinder and the force-increasing cylinder work simultaneously. The maximum thrust and the minimum thrust output by the multiple-force cylinder differ by more than ten times, which can adapt to different working requirements and has stronger adaptability and versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0022] Figure 2 is an exploded view of the multiple-force cylinder of the present utility model;

[0023] Figure 3 is Figure 1 a partial enlarged view of part A of

[0024] Figure 4 andFigure 5 It is the pneumatic circuit diagram of a booster cylinder.

[0025] It should be noted that the attached drawings are not necessarily drawn to scale, but are shown only in a schematic manner that does not affect the reader's understanding. Specific embodiments

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the attached drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] In the present invention, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the attached drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit that the indicated device, element or component must have a specific orientation, or be constructed and operated in a specific orientation.

[0028] Moreover, in addition to being able to represent the orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the present invention can be understood according to the specific circumstances.

[0029] In addition, the terms "installed", "set", "provided with", "connected", "connected to" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or there is an internal connection between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0030] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, the meaning of "a plurality" is two or more.

[0031] It should also be understood that the terms used in the specification of the present utility model are merely for the purpose of describing specific embodiments and are not intended to limit the present utility model. As used in the specification of the present utility model and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include the plural forms.

[0032] It should be further understood that the term "and / or" used in the specification of the present utility model and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0033] As Figures 1 to 3 shown, a multiple-force cylinder for a pneumatic vise includes a force-increasing cylinder 1, and an oval piston 11 is arranged inside the force-increasing cylinder 1.

[0034] Further, it also includes a thrust cylinder 2, a thrust piston 21 is arranged inside the thrust cylinder 2, and a piston rod 3 is fixedly connected between the thrust piston 21 and the oval piston 11; the thrust piston 21 and the oval piston 11 are separated by a piston spacer 4.

[0035] Further, it also includes a cylinder connection cover 5, and a piston hole 51 is provided in the middle of the cylinder connection cover 5. When the cylinder works under the air source, because the oval piston 11 is arranged in the force-increasing cylinder, compared with an ordinary circular piston, the oval piston 11 increases the force-bearing area, and thus the acting force is also greater. Finally, under the combined thrust of the force-increasing cylinder and the thrust cylinder, the clamping force of the pneumatic vise is also greater, which can meet the requirement of heavy clamping.

[0036] Further, it also includes a connecting rod sleeve 6, pin holes 61 are provided at both ends of the connecting rod sleeve 6, and a pin hole is also provided at the front end of the piston rod 3. The piston rod 3 passes through the piston hole 51 and is connected to the connecting rod sleeve 6 by inserting a piston rod pin 31 into the pin hole 61.

[0037] Further, it also includes a pneumatic vise lead screw 7 and a lead screw pin 71, and the pneumatic vise lead screw 7 and the connecting rod sleeve 6 are connected by the lead screw pin 71.

[0038] Further, the pneumatic vise lead screw 7 and the connecting rod sleeve 6 are provided with matching annular grooves, and can rotate freely through the annular grooves.

[0039] Further, a compression nut 8 is connected to the rear end of the piston rod 3. The pneumatic vise lead screw 7 rotates freely through the annular groove. When the radial force received during the processing of the clamped object by the pneumatic vise will not be transmitted to the piston rod 3 through the pneumatic vise lead screw 7 and the piston rod 3 slides without radial force, the service life of the multiple-force cylinder is guaranteed.

[0040] AsFigure 4 As shown in the figure, the first type: when the pneumatic vise requires a relatively small clamping force, the air supply path of the multiple air cylinders is as follows:

[0041] Air source → air port A11 of the manifold → air port A12 of the manifold → air port A51 of the pressure regulating valve → air port A52 of the pressure regulating valve → air port A21 of the manifold → air port A22 of the manifold → air port A61 of control valve 1 → air port A63 of control valve 1 → air port A41 of the manifold → air port A43 of the manifold → air port A92 of the pushing cylinder. When air port A92 of the pushing cylinder is ventilated for operation, the piston rod of the multiple air cylinders extends, drives the pneumatic vise lead screw through the connecting rod sleeve, moves the jaws of the pneumatic vise outward, and the pneumatic vise is in the open state;

[0042] Air source → air port A11 of the manifold → air port A12 of the manifold → air port A51 of the pressure regulating valve → air port A52 of the pressure regulating valve → air port A21 of the manifold → air port A22 of the manifold → air port A61 of control valve 1 → air port A62 of control valve 1 → air port A31 of the manifold → air port A33 of the manifold → air inlet A81 of the tee joint → air inlet A82 of the tee joint → air port A91 of the pushing cylinder. When air port A91 of the pushing cylinder is ventilated for operation, the piston rod of the multiple air cylinders retracts, drives the pneumatic vise lead screw through the connecting rod sleeve, moves the jaws of the pneumatic vise inward, and the pneumatic vise clamps the workpiece;

[0043] Air source → air port A11 of the manifold → air port A12 of the manifold → air port A51 of the pressure regulating valve → air port A52 of the pressure regulating valve → air port A21 of the manifold → air port A22 of the manifold → air port A61 of control valve 1 → air port A63 of control valve 1 → air port A41 of the manifold → air port A43 of the manifold → air port A92 of the pushing cylinder. When air port A92 of the pushing cylinder is ventilated for operation, the piston rod of the multiple air cylinders extends, drives the pneumatic vise lead screw through the connecting rod sleeve, moves the jaws of the pneumatic vise outward, and the workpiece is loosened.

[0044] The second type: when the pneumatic vise requires a relatively large clamping force, the air supply path of the multiple air cylinders is as follows:

[0045] Air source → air port A11 of the manifold → air port A12 of the manifold → air port A51 of the pressure regulating valve → air port A52 of the pressure regulating valve → air port A21 of the manifold → air port A22 of the manifold → air port A61 of control valve 1 → air port A63 of control valve 1 → air port A41 of the manifold → air port A43 of the manifold → air port A92 of the pushing cylinder. When air port A92 of the pushing cylinder is ventilated for operation, the piston rod of the multiple air cylinders extends, drives the pneumatic vise lead screw through the connecting rod sleeve, moves the jaws of the pneumatic vise outward, and the pneumatic vise is in the open state;

[0046] Air source → Confluence plate air port A11 → Confluence plate air port A12 → Pressure regulating valve air port A51 → Pressure regulating valve air port A52 → Confluence plate air port A21 → Confluence plate air port A22 → Control valve 1 air port A61 → Control valve 1 air port A62 → Confluence plate air port A31 → Confluence plate air port A33 → Three-way joint air inlet A81 → Three-way joint air inlet A82 → Pushing cylinder air port A91. When the pushing cylinder air port A91 is ventilated for operation, the piston rod of the double-acting cylinder retracts, drives the pneumatic vise screw through the connecting rod sleeve, makes the jaws of the pneumatic vise move inward, and the pneumatic vise clamps the workpiece.

[0047] Synchronously, air source → Confluence plate air port A11 → Confluence plate air port A12 → Pressure regulating valve air port A51 → Pressure regulating valve air port A52 → Confluence plate air port A21 → Confluence plate air port A22 → Control valve 1 air port A61 → Control valve 1 air port A62 → Confluence plate air port A31 → Confluence plate air port A33 → Three-way joint air inlet A81 → Three-way joint air inlet A83 → Control valve 2 air port A101 → Control valve 2 air port A102 → Force-increasing cylinder air port A93. When the force-increasing cylinder air port A93 is ventilated for operation, the clamping force of the jaws of the pneumatic vise on the workpiece is increased.

[0048] Air source → Confluence plate air port A11 → Confluence plate air port A12 → Pressure regulating valve air port A51 → Pressure regulating valve air port A52 → Confluence plate air port A21 → Confluence plate air port A22 → Control valve 1 air port A61 → Control valve 1 air port A63 → Confluence plate air port A41 → Confluence plate air port A43 → Pushing cylinder air port A92. When the pushing cylinder air port A92 is ventilated for operation, the piston rod of the double-acting cylinder extends, drives the pneumatic vise screw through the connecting rod sleeve, makes the jaws of the pneumatic vise move outward, and the pneumatic vise releases the workpiece.

[0049] As Figure 5 shown, the first type: When the pneumatic vise requires a smaller clamping force, the ventilation path of the double-acting cylinder is:

[0050] Air source → Confluence plate air port A11 → Confluence plate air port A12 → Pressure regulating valve air port A51 → Pressure regulating valve air port A52 → Confluence plate air port A21 → Confluence plate air port A23 → Solenoid valve air inlet A71 → Solenoid valve air port A72 → Confluence plate air port A42 → Confluence plate air port A43 → Pushing cylinder air port A92. When the pushing cylinder air port A92 is ventilated for operation, the piston rod of the double-acting cylinder extends, drives the pneumatic vise screw through the connecting rod sleeve, makes the jaws of the pneumatic vise move outward, and the pneumatic vise is in the released state.

[0051] Air source → Confluence plate air port A11 → Confluence plate air port A12 → Pressure regulating valve air port A51 → Pressure regulating valve air port A52 → Confluence plate air port A21 → Confluence plate air port A23 → Solenoid valve inlet A71 → Solenoid valve air port A73 → Confluence plate air port A32 → Confluence plate air port A33 → Three-way joint inlet A81 → Three-way joint inlet A82 → Pushing cylinder air port A91. When the pushing cylinder air port A91 is ventilated for work, the piston rod of the double-acting cylinder retracts, drives the pneumatic vise lead screw through the connecting rod sleeve, makes the jaws of the pneumatic vise move inwards, and the pneumatic vise clamps the workpiece;

[0052] Air source → Confluence plate air port A11 → Confluence plate air port A12 → Pressure regulating valve air port A51 → Pressure regulating valve air port A52 → Confluence plate air port A21 → Confluence plate air port A23 → Solenoid valve inlet A71 → Solenoid valve air port A72 → Confluence plate air port A42 → Confluence plate air port A43 → Pushing cylinder air port A92. When the pushing cylinder air port A92 is ventilated for work, the piston rod of the double-acting cylinder extends, drives the pneumatic vise lead screw through the connecting rod sleeve, makes the jaws of the pneumatic vise move outwards, and the pneumatic vise loosens the workpiece.

[0053] Second type: When the pneumatic vise requires a larger clamping force, the air path of the double-acting cylinder:

[0054] Air source → Confluence plate air port A11 → Confluence plate air port A12 → Pressure regulating valve air port A51 → Pressure regulating valve air port A52 → Confluence plate air port A21 → Confluence plate air port A23 → Solenoid valve inlet A71 → Solenoid valve air port A72 → Confluence plate air port A42 → Confluence plate air port A43 → Pushing cylinder air port A92. When the pushing cylinder air port A92 is ventilated for work, the piston rod of the double-acting cylinder extends, drives the pneumatic vise lead screw through the connecting rod sleeve, makes the jaws of the pneumatic vise move outwards, and the pneumatic vise is in the loosened state;

[0055] Air source → Confluence plate air port A11 → Confluence plate air port A12 → Pressure regulating valve air port A51 → Pressure regulating valve air port A52 → Confluence plate air port A21 → Confluence plate air port A23 → Solenoid valve inlet A71 → Solenoid valve air port A73 → Confluence plate air port A32 → Confluence plate air port A33 → Three-way joint inlet A81 → Three-way joint inlet A82 → Pushing cylinder air port A91. When the pushing cylinder air port A91 is ventilated for work, the piston rod of the double-acting cylinder retracts, drives the pneumatic vise lead screw through the connecting rod sleeve, makes the jaws of the pneumatic vise move inwards, and the pneumatic vise clamps the workpiece;

[0056] Synchronous, air source → air inlet A11 of the manifold → air outlet A12 of the manifold → air inlet A51 of the pressure regulator → air outlet A52 of the pressure regulator → air inlet A21 of the manifold → air outlet A23 of the manifold → air inlet A71 of the solenoid valve → air outlet A73 of the solenoid valve → air outlet A32 of the manifold → air outlet A33 of the manifold → air inlet A81 of the tee joint → air inlet A83 of the tee joint → air inlet A101 of control valve 2 → air outlet A102 of control valve 2 → air inlet A93 of the booster cylinder. The air inlet A93 of the booster cylinder is ventilated to work, improving the clamping force of the jaws of the pneumatic vise on the workpiece;

[0057] Air source → air inlet A11 of the manifold → air outlet A12 of the manifold → air inlet A51 of the pressure regulator → air outlet A52 of the pressure regulator → air inlet A21 of the manifold → air outlet A23 of the manifold → air inlet A71 of the solenoid valve → air outlet A72 of the solenoid valve → air outlet A42 of the manifold → air outlet A43 of the manifold → air inlet A92 of the push cylinder. The air inlet A92 of the push cylinder is ventilated to work, the piston rod of the double-acting cylinder extends, drives the screw rod of the pneumatic vise through the connecting rod sleeve, and makes the jaws of the pneumatic vise move outward to loosen the workpiece.

[0058] The following is an example to illustrate the effect of the present invention: The push cylinder can be designed as a circular cylinder with a diameter of 100, and the booster cylinder can be designed as an elliptical cylinder with a diameter of 200. It can be that the previous push cylinder works alone, or the two cylinders work simultaneously. In this case, the output thrust of the whole cylinder is (1570 - 18625 N), and the maximum output thrust is about 11 times that of the minimum thrust. The adjustment range of the cylinder thrust is very large, which can meet various processing requirements.

[0059] Regarding the embodiments of the present invention, it should also be noted that, without conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other to obtain new embodiments.

[0060] The above is only a preferred embodiment of the present invention, and it does not impose any form of limitation on the present invention. The protection scope of the present invention should be subject to the protection scope of the claims. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art, within the scope of the technical solution of the present invention, can make some changes or modifications to equivalent embodiments by using the above-disclosed technical content. However, as long as it does not depart from the content of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A double-force cylinder for a pneumatic vise, characterized in that: It comprises a booster cylinder, wherein an elliptical piston is arranged inside the booster cylinder; It also includes a thrust cylinder, a thrust piston is arranged inside the thrust cylinder, a piston rod is fixedly connected between the thrust piston and the elliptical piston; the thrust piston and the elliptical piston are separated by a piston spacer.

2. A double-force cylinder for a pneumatic vise according to claim 1, characterized in that: It also includes a cylinder connecting cover, and a piston hole is arranged in the middle of the cylinder connecting cover.

3. A double-force cylinder for a pneumatic vise according to claim 2, characterized in that: It also includes a connecting rod sleeve, wherein both ends of the connecting rod sleeve are provided with latch holes, and the front end of the piston rod is also provided with a latch hole. The piston rod passes through the piston hole and is connected to the connecting rod sleeve by inserting a piston rod latch into the latch hole.

4. A multi-force cylinder for a pneumatic vise according to claim 3, characterized in that: It also includes a screw pin and a pneumatic vise screw pin. The pneumatic vise screw pin and a connecting rod sleeve are connected through the screw pin.

5. A double-force cylinder for a pneumatic vise according to claim 4, characterized in that: The pneumatic vise screw rod and the connecting rod sleeve are provided with matching annular grooves, and can rotate freely through the annular grooves.

6. A multi-force cylinder for a pneumatic vise according to claim 5, characterized in that: The rear end of the piston rod is connected with a compression nut.

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