High-output-force hollow air cylinder

Abstract

The utility model discloses a high-output-force hollow air cylinder which comprises a cylinder barrel assembly penetrating through the upper end face and the lower end face and provided with a cylinder hole and a piston assembly arranged in the cylinder hole of the cylinder barrel assembly. The cylinder barrel assembly comprises an upper cylinder barrel, a lower cylinder barrel and a first sealing piece arranged between the lower end face of the upper cylinder barrel and the upper end face of the lower cylinder barrel. The piston assembly comprises a piston rod of a hollow structure and a piston connected to the periphery of the middle of the piston rod. The hollow structure of the piston rod penetrates through the two ends of the piston rod and is used for a power output shaft of an external electric execution element to extend into. The cylinder barrel is arranged to be of a split structure of the upper cylinder barrel and the lower cylinder barrel, and the lower end face of the upper cylinder barrel and the upper end face of the lower cylinder barrel are sealed, so that the inner diameter of a cylinder hole is maximized, the area of a piston can be increased, and the output force of the cylinder is greatly improved while the whole appearance of the cylinder is not changed.

Description

TECHNICAL FIELD

[0001] The utility model relates to industrial automation equipment pneumatic technical field especially relates to a hollow air cylinder of high output force. BACKGROUND

[0002] In the industrial automation field, pneumatic execution element is often used to assist electric execution element to realize the support of product object and mechanism, guide movement part to do reciprocating linear motion in given direction, repeat positioning action and other functions, thereby realizing the brake, self-locking and positioning of electric execution element.

[0003] However, in the existing standard pneumatic execution element, the cylinder is solid structure due to the structure of the piston and piston rod. When the power output shaft of the electric execution element needs to be braked, self-locked and positioned, the cylinder itself cannot be directly sleeved into the power output shaft of the electric execution element, and complex mechanical structure is usually needed to assist in completing these functions, which not only increases the design difficulty, but also reduces the work efficiency and increases the cost. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a hollow air cylinder of high output force, which sets the cylinder barrel as a split structure of upper cylinder barrel and lower cylinder barrel, seals between the lower end face of the upper cylinder barrel and the upper end face of the lower cylinder barrel, maximizes the cylinder hole diameter, increases the area of the piston, and greatly improves the output force of the cylinder while ensuring the overall shape of the cylinder.

[0005] To achieve the above-mentioned purpose, the following technical scheme is adopted:

[0006] A hollow air cylinder of high output force comprises a cylinder barrel assembly with a cylinder hole passing through the upper and lower end faces, and a piston assembly installed in the cylinder hole of the cylinder barrel assembly; the cylinder barrel assembly comprises an upper cylinder barrel, a lower cylinder barrel, and a first sealing piece installed between the lower end face of the upper cylinder barrel and the upper end face of the lower cylinder barrel; the piston assembly comprises a piston rod with a hollow structure, and a piston connected to the outer periphery of the middle part of the piston rod; the hollow structure of the piston rod is provided at both ends of the piston rod, and is used for the power output shaft of the external electric execution element to extend into.

[0007] Preferably, the lower end face of the upper cylinder barrel is provided with a first sealing groove, and the first sealing piece is embedded in the first sealing groove.

[0008] Preferably, an O-shaped sealing ring is arranged between the outer periphery of the piston and the inner wall of the cylinder hole of the cylinder barrel assembly.

[0009] Preferably, a plurality of locking assemblies are arranged at intervals on the outer periphery of the cylinder barrel assembly, which are used for locking and fixing the upper cylinder barrel and the lower cylinder barrel.

[0010] Preferably, the side wall of the upper cylinder is provided with a first gas hole communicating with the outside and penetrating into the cylinder hole, and the side wall of the lower cylinder is provided with a second gas hole communicating with the outside and penetrating into the cylinder hole; the first gas hole is used for controlling the piston assembly to descend, and the second gas hole is used for controlling the piston assembly to ascend.

[0011] Preferably, the outer periphery of the upper end of the piston rod and the upper cylinder, and the outer periphery of the lower end of the piston rod and the lower cylinder are both provided with a second sealing element.

[0012] Preferably, the material of the upper cylinder and the lower cylinder is aluminum alloy, and the surface of the upper cylinder and the lower cylinder is subjected to sand blasting and hard anodic oxidation treatment.

[0013] By adopting the above scheme, the beneficial effects of the utility model are as follows:

[0014] The utility model discloses a high output force hollow air cylinder, and the piston rod is hollow structure, and there is enough space to be able to cover the power output shaft of electric actuating element, thereby can fast response to realize the brake, self -locking or positioning of electric actuating element. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 It is the perspective view of the utility model;

[0016] Fig. 2 It is the explosion drawing of the utility model;

[0017] Fig. 3 It is the sectional view of the utility model;

[0018] Among them, the drawing mark explanation is as follows:

[0019] 1 - cylinder assembly, 2 - piston assembly,

[0020] 3 - lock attachment assembly, 4 - first gas hole,

[0021] 5 - second gas hole, 6 - second sealing element,

[0022] 11 - upper cylinder, 12 - lower cylinder,

[0023] 13 - first sealing element, 21 - piston rod,

[0024] 22 - piston. DETAILED DESCRIPTION

[0025] The utility model will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are merely intended to explain the utility model, and not to limit the utility model. In addition, it should be noted that, for the convenience of description, only part of the structure related to the utility model is shown in the drawings, not all the structures.

[0026] In the utility model, unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature to the second feature can include the direct contact of the first and second features, or the contact of the first and second features through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature to the second feature include the vertical and oblique above of the first feature to the second feature, or only indicate that the horizontal height of the first feature is higher than the second feature. The "below", "below" and "below" of the first feature to the second feature include the vertical and oblique below of the first feature to the second feature, or only indicate that the horizontal height of the first feature is less than the second feature.

[0027] In the description of the embodiment, the orientation or position relationship of the terms "upper", "lower", "left", "right" and the like is based on the orientation or position relationship shown in the drawings, only for the convenience of description and simplification of operation, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the utility model. In addition, the terms "first" and "second" are only used to distinguish in description, and have no special meaning.

[0028] Referring to Figs. 1 to 3 The utility model provides a kind of high output force hollow air cylinder, including the cylinder barrel assembly 1 with the cylinder hole being set up in the through upper and lower end face, and the piston assembly 2 installed in the cylinder hole of cylinder barrel assembly 1;The cylinder barrel assembly 1 includes upper cylinder barrel 11, lower cylinder barrel 12, and the first sealing element 13 installed between the lower end surface of upper cylinder barrel 11 and the upper end surface of lower cylinder barrel 12;Specifically, first sealing element 13 is O-shaped sealing ring.The lower end surface of upper cylinder barrel 11 is provided with first sealing groove, and first sealing element 13 is embedded in first sealing groove installation.

[0029] The piston assembly 2 includes a hollow piston rod 21 and a piston 22 connected to the outer circumference of the middle part of the piston rod 21. The hollow structure of the piston rod 21 extends through both ends of the piston rod 22, allowing the power output shaft of an external electric actuator to extend into it. The high-output-force air cylinder provided by this invention, due to the hollow structure of the piston rod 21, results in a lighter piston assembly 2, inevitably reducing the cylinder's output force. Therefore, by configuring the cylinder barrel as a split structure of an upper cylinder barrel 11 and a lower cylinder barrel 12, and sealing the lower end face of the upper cylinder barrel 11 with the upper end face of the lower cylinder barrel 12, the inner diameter of the cylinder bore is maximized, thereby increasing the area of ​​the piston 22. This significantly improves the cylinder's output force while maintaining the overall shape of the cylinder.

[0030] The cylinder assembly 1 is provided with a plurality of locking components 3 at intervals on its outer circumference for locking and fixing the upper cylinder 11 and the lower cylinder 12. Specifically, the locking component 3 includes a screw and a nut that is threadedly connected to the screw.

[0031] Please continue to refer to Fig. 3 The upper cylinder 11 has a first vent 4 on its side wall, which communicates with the outside and extends into the cylinder bore. The lower cylinder 12 has a second vent 5 on its side wall, which also communicates with the outside and extends into the cylinder bore. The first vent 4 controls the piston assembly 2 to descend, and the second vent 5 controls the piston assembly 2 to ascend. When the first vent 4 is vented, the piston 22 descends; when the second vent 5 is vented, the piston 22 ascends. In one specific embodiment, a tapered elastic bushing is movably fitted around the power output shaft of the electric actuator. When the second vent 5 is vented, causing the piston 22 to ascend, the piston rod 21 drives the elastic bushing to grip the power output shaft of the electric actuator, thereby braking the electric actuator. When the first vent 4 is vented, causing the piston 22 to descend, the piston rod releases the elastic bushing, thereby releasing the electric actuator.

[0032] A second sealing element 6 is provided between the upper outer circumference of the piston rod 21 and the upper cylinder 11, and between the lower outer circumference of the piston rod 21 and the lower cylinder 12. Specifically, the second sealing element 6 is an O-ring.

[0033] The high-output force air cylinder provided by this utility model can achieve the following effects:

[0034] 1) By setting the piston rod 21 as a hollow structure, there is enough space to fit the power output shaft of the electric actuator. By utilizing the rapid response of pneumatic transmission, the electric actuator can be quickly braked, self-locked and positioned, thus improving work efficiency.

[0035] 2) By sealing between the lower end face of the upper cylinder 11 and the upper end face of the lower cylinder 12, and then fixing it with the locking assembly 3 after sealing, the sealing position space is saved, the inner diameter of the cylinder bore is maximized to increase the area of ​​the piston 22, and the output force of the cylinder is significantly improved, which can more effectively achieve braking, self-locking and positioning of the electric actuator.

[0036] 3) The structure is simple, reducing the number of parts and assembly steps compared to traditional complex mechanical structures, thus lowering manufacturing costs;

[0037] 4) The upper cylinder barrel 11 and the lower cylinder barrel 12 are made of aluminum alloy and the surface is treated with sandblasting and hard anodizing, which not only improves the strength of the cylinder, but also facilitates installation and maintenance.

[0038] 5) An O-ring is provided between the outer circumference of the piston 22 and the inner wall of the cylinder bore of the cylinder assembly 1. Under the condition of ensuring no air leakage, it can effectively ensure the smooth operation of the cylinder and extend the service life of the cylinder.

[0039] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model. Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the utility model and are not intended to limit the implementation of this utility model. For those skilled in the art, various obvious changes, readjustments, and substitutions can be made without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A high-output-force air cylinder, characterized in that, The device includes a cylinder assembly with cylinder holes extending through both its upper and lower end faces, and a piston assembly installed within the cylinder holes of the cylinder assembly. The cylinder assembly includes an upper cylinder, a lower cylinder, and a first seal installed between the lower end face of the upper cylinder and the upper end face of the lower cylinder. The piston assembly includes a piston rod with a hollow structure and a piston connected to the outer circumference of the middle part of the piston rod. The hollow structure of the piston rod extends through both ends of the piston rod to allow the power output shaft of an external electric actuator to extend into it.

2. The high-output force air cylinder according to claim 1, characterized in that, The lower end face of the upper cylinder is provided with a first sealing groove, and the first sealing element is installed in the first sealing groove.

3. The high-output force air cylinder according to claim 1, characterized in that, An O-ring is provided between the outer circumference of the piston and the inner wall of the cylinder bore of the cylinder assembly.

4. The high-output force air cylinder according to claim 1, characterized in that, The cylinder assembly is provided with multiple locking components spaced apart on its outer periphery for locking and fixing the upper cylinder and the lower cylinder.

5. The high-output-force air cylinder according to claim 1, characterized in that, The upper cylinder has a first vent hole on its side wall that connects to the outside and extends into the cylinder bore, and the lower cylinder has a second vent hole on its side wall that connects to the outside and extends into the cylinder bore; the first vent hole is used to control the piston assembly to descend, and the second vent hole is used to control the piston assembly to ascend.

6. The high-output-force air cylinder according to claim 1, characterized in that, A second seal is provided between the upper outer circumference of the piston rod and the upper cylinder, and between the lower outer circumference of the piston rod and the lower cylinder.

7. The high-output force air cylinder according to claim 1, characterized in that, The upper and lower cylinder barrels are made of aluminum alloy, and their surfaces are treated with sandblasting and hard anodizing.

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