Compact rotating cylinder

Abstract

The utility model discloses a compact type rotary air cylinder, and belongs to the technical field of air cylinders. Comprising an air cylinder barrel, and a front end plate and a rear end plate are arranged at the front end and the rear end of an inner cavity of the air cylinder barrel respectively; two ends of the cylinder guide rod are respectively connected with the front end plate and the rear end plate; the piston is movably arranged on the air cylinder guide rod in a sleeving mode, the piston rod is connected with the piston, and the piston rod is pushed by airflow to move linearly; and the oscillating cylinder is provided with a rotating shaft for in-situ rotation, the rotating shaft is connected with the rear end plate, and a cylinder guide rod, a piston and a piston rod are sequentially driven to rotate along with rotation of the rotating shaft. The linear cylinder and the oscillating cylinder are combined, so that the linear motion and the rotary motion of the piston rod are independently controlled, the total length of the cylinder is equal to the sum of the total stroke length of the piston rod and the length of the front end plate and the rear end plate, the total length of the cylinder is greatly shortened, and the mounting space of the cylinder is remarkably saved; and the method is especially suitable for industrial scenes with harsh space requirements.

Description

Technical Field

[0001] This utility model belongs to the field of cylinder technology, specifically relating to a compact rotary cylinder. Background Technology

[0002] In modern industrial automated production processes, the demand for devices capable of achieving linear motion and rotational motion at specific angles is increasing. Currently, some cylinders are attempting to address this demand by pre-fabricating rotary grooves on the piston rod.

[0003] However, this method has several shortcomings:

[0004] 1. Prefabricated rotary grooves greatly increase the manufacturing complexity of piston rods, requiring highly precise machining equipment and processes to ensure the dimensional accuracy and surface quality of the groove, thus leading to a significant increase in costs.

[0005] 2. The presence of the rotating groove weakens the structural integrity of the piston rod, reduces its strength and rigidity, and makes it prone to deformation or even breakage when subjected to large loads, which has a negative impact on the reliability and service life of the cylinder.

[0006] 3. Angle adjustment achieved through a rotary groove usually requires complex external limiting structures, which makes the adjustment process cumbersome and difficult to guarantee accuracy, making it impossible to flexibly meet changing production needs.

[0007] 4. More importantly, since the rotating groove cannot extend outward from inside the cylinder barrel, otherwise it will lead to air leakage. Therefore, this design will result in a significant increase in the total length of the cylinder. In order to arrange the rotating groove and related mating structures, the overall length of the cylinder has to be extended further on the basis of the original stroke. This not only occupies more installation space, but is also unsuitable in some automated production lines with strict space layout requirements. It also increases material costs and transportation difficulties.

[0008] As industrial production moves towards higher efficiency, compactness, and intelligence, traditional designs based on piston rod rotary grooves are no longer sufficient to meet the needs of modern production. Therefore, there is an urgent need to develop new technological solutions to overcome existing challenges and improve equipment performance and adaptability. Utility Model Content

[0009] This invention addresses the aforementioned problems in the existing technology by proposing a compact rotary cylinder that can shorten the cylinder length.

[0010] This utility model can be achieved through the following technical solutions:

[0011] A compact rotary cylinder includes:

[0012] A linear cylinder, comprising:

[0013] The cylinder barrel has a front end plate and a rear end plate at the front and rear ends of its inner cavity, respectively.

[0014] A cylinder guide rod is disposed inside the cylinder barrel and its two ends are respectively connected to the front end plate and the rear end plate;

[0015] A piston and a piston rod, wherein the piston is movably sleeved on the cylinder guide rod, and the piston rod is connected to the piston;

[0016] When air enters the cylinder barrel, the airflow pushes the piston to move along the cylinder guide rod, causing the piston rod to move synchronously in a straight line;

[0017] A swing cylinder is connected to the cylinder barrel by fasteners. The swing cylinder has a rotating shaft for in-situ rotation. The rotating shaft is connected to the rear end plate. As the rotating shaft rotates, it sequentially drives the cylinder guide rod, the piston, and the piston rod to rotate.

[0018] As a further improvement of this utility model, the side wall of the cylinder barrel is provided with a first air inlet and a second air inlet that penetrate its inner cavity. The first air inlet is close to the rear end plate, and the second air inlet is close to the front end plate.

[0019] As a further improvement of this utility model, when air enters through the first air inlet, the airflow pushes the piston and piston rod to move away from the swing cylinder.

[0020] When air enters through the second air inlet, the airflow pushes the piston and the piston rod to move in the direction of the swing cylinder.

[0021] As a further improvement of this utility model, the cylinder guide rod is provided in the form of two rods, which are symmetrically distributed along the axis of the rotating shaft.

[0022] As a further improvement of this utility model, when the rotating shaft rotates, it drives the two cylinder guide rods to rotate around the rotating shaft as the central axis through the rear end plate. During the rotation, the piston rotates synchronously to realize the rotation of the piston rod.

[0023] As a further improvement of this utility model, the piston is provided with a magnet, which is connected to an external sensor for sensing. The position of the piston is identified by sensing the position of the magnet in real time through the sensor.

[0024] As a further improvement of this utility model, an X-shaped sealing ring is fitted on the outer peripheral wall of the piston, and the piston and the inner wall of the cylinder barrel are sealed by the X-shaped sealing ring.

[0025] As a further improvement of this utility model, the linear cylinder also includes a cylinder front cover, which is sealed to the cylinder barrel, and the cylinder front cover has a central through hole through which the piston rod passes.

[0026] As a further improvement of this utility model, a support ring is provided on the end face of the cylinder front cover that is inserted into the cylinder barrel. The support ring has a rotating groove, and the ends of the two cylinder guide rods are inserted into the rotating groove.

[0027] As a further improvement of this utility model, the control end of the swing cylinder is provided with an angle adjustment device, which includes an adjustment screw and an angle scale. The adjustment screw is connected to the rotating part of the swing cylinder to control the rotation of the rotating shaft, and the angle scale is used to indicate the angle of rotation of the adjustment screw.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. Compact structure: By combining linear cylinder and swing cylinder, independent control of the linear and rotary motion of the piston rod is achieved. The improved design makes the total length of the cylinder equal to the total stroke length of the piston rod plus the length of the front and rear plates, with no additional rotation length. Compared with the existing technology of cylinders that achieve compound motion by opening a rotary groove on the piston rod, the total length of the cylinder is greatly shortened, and the installation space of the cylinder is significantly saved. It is especially suitable for industrial scenarios with strict space requirements.

[0030] 2. Improved reliability and service life: By avoiding the pre-fabrication of rotating grooves on the piston rod, the structural integrity of the piston rod is maintained, improving its strength and rigidity. This means that when subjected to heavy loads, the risk of deformation or even breakage is reduced, significantly improving the reliability and service life of the equipment;

[0031] 3. Simplified angle adjustment process: Compared with the traditional method of angle adjustment that relies on complex external limiting structures, the new design uses a swing cylinder to directly drive the rotating shaft to rotate, which simplifies the angle adjustment process, improves adjustment accuracy and flexibility, and can adapt to diverse production needs more quickly.

[0032] 4. Reduced manufacturing costs: The elimination of the need for high-precision machining of the rotary groove reduces manufacturing difficulty and costs. At the same time, due to the reduction in overall size, material costs and transportation difficulties are also reduced accordingly.

[0033] 5. Real-time monitoring of piston position: The piston is equipped with a magnet, which is connected to an external sensor. The position of the piston is identified by the real-time sensing of the magnet's position. This not only achieves high-precision position feedback, but also significantly improves the overall automation control level of the equipment, reduces maintenance requirements, enhances adaptability and flexibility, and simplifies structural design.

[0034] 6. Precise Angle Adjustment: An angle adjustment device, such as an adjusting screw and an angle dial, is installed in the control part of the swing cylinder. The adjusting screw is connected to the rotating part of the swing cylinder to control the rotation of the shaft. This design allows the operator to fine-tune the rotation angle according to actual needs, thereby achieving precise angle positioning. The angle dial is used to indicate the angle of rotation of the adjusting screw, providing an intuitive visual feedback mechanism to help the operator accurately set the required rotation angle and improve the accuracy of operation. Attached Figure Description

[0035] Figure 1 This is a cross-sectional view of the compact rotary cylinder of this utility model.

[0036] In the diagram, 100 is a linear cylinder; 110 is the cylinder barrel; 111 is the first air inlet; 112 is the second air inlet; 120 is the front end plate; 130 is the rear end plate; 140 is the cylinder guide rod; 150 is the piston; 151 is the X-shaped sealing ring; 160 is the piston rod; 170 is the cylinder front cover; 180 is the support ring; 200 is the swing cylinder; and 210 is the rotating shaft. Detailed Implementation

[0037] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. The technical methods of the present invention will be further described, but the present invention is not limited to these embodiments.

[0038] like Figure 1 As shown, this utility model provides a compact rotary cylinder, comprising:

[0039] Linear cylinder 100, comprising:

[0040] The cylinder barrel 110 has a front end plate 120 and a rear end plate 130 respectively at the front and rear ends of its inner cavity;

[0041] The cylinder guide rod 140 is disposed inside the cylinder barrel 110 and its two ends are respectively connected to the front end plate 120 and the rear end plate 130.

[0042] Piston 150 and piston rod 160, piston 150 is movably sleeved on cylinder guide rod 140, piston rod 160 is connected to piston 150;

[0043] When air enters the cylinder barrel 110, the airflow pushes the piston 150 to move along the cylinder guide rod 140, which in turn drives the piston rod 160 to move synchronously in a straight line.

[0044] The swing cylinder 200 is connected to the cylinder barrel 110 by fasteners. The swing cylinder 200 has a rotating shaft 210 for in-situ rotation. The rotating shaft 210 is connected to the rear end plate 130. As the rotating shaft 210 rotates, it sequentially drives the cylinder guide rod 140, piston 150 and piston rod 160 to rotate.

[0045] This design combines the linear cylinder 100 with the swing cylinder 200 to achieve independent control of the linear and rotary motion of the piston rod 160. The linear motion of the piston rod 160 is achieved by air intake through the cylinder barrel 110, while its rotary motion is driven by the rotating shaft 210 of the swing cylinder 200 and then transmitted through the rear end plate 130, the cylinder guide rod 140, and the piston 150.

[0046] It should be noted that the key advantage of the rotary cylinder provided in this embodiment lies in its compact structural design. The improved design makes the total length of the cylinder equal to the total stroke length of the piston rod 160 plus the length of the front end plate 120 and the rear end plate 130, with no additional rotation length. Compared with the cylinders in the prior art that achieve compound motion by opening a rotation groove on the piston rod 160, the total length of the cylinder is greatly shortened, and the installation space of the cylinder is significantly saved. It is particularly suitable for industrial scenarios with demanding space requirements.

[0047] In addition, it has brought at least the following beneficial effects:

[0048] 1. Improved reliability and service life: By avoiding the pre-fabrication of rotational grooves on the piston rod 160, the structural integrity of the piston rod 160 is maintained, improving strength and rigidity. This means that when subjected to heavy loads, the risk of deformation or even breakage is reduced, significantly improving the reliability and service life of the equipment;

[0049] 2. Simplified angle adjustment process: Compared with the traditional method of angle adjustment that relies on complex external limiting structures, the new design uses the swing cylinder 200 to directly drive the rotating shaft 210 to rotate, which simplifies the angle adjustment process, improves the adjustment accuracy and flexibility, and can adapt to diverse production needs more quickly.

[0050] 3. Reduced manufacturing costs: The elimination of the need for high-precision machining of the rotary groove reduces manufacturing difficulty and cost. At the same time, due to the reduction in overall size, material costs and transportation difficulties are also reduced accordingly.

[0051] Preferably, the cylinder barrel 110 has a first air inlet 111 and a second air inlet 112 that penetrate its inner cavity on its side wall. The first air inlet 111 is close to the rear end plate 130, and the second air inlet 112 is close to the front end plate 120. The specific working principle of the linear motion of the piston rod 160 is as follows:

[0052] When air enters through the first air inlet 111, the airflow pushes the piston 150 and piston rod 160 to move away from the swing cylinder 200, and this process realizes the extension action of the piston rod 160.

[0053] When air enters through the second air inlet 112, the airflow pushes the piston 150 and piston rod 160 to move toward the direction of the swing cylinder 200. This step realizes the retraction action of the piston rod 160.

[0054] With the dual air inlets, operators can select the appropriate air inlet according to actual needs to achieve linear motion of the piston rod in different directions.

[0055] Preferably, the cylinder guide rods 140 are arranged in pairs and symmetrically distributed along the axis of the rotating shaft 210. This design not only enhances the stability and rigidity of the structure, but also ensures balance and accuracy during rotational motion. Specifically:

[0056] 1. When the rotating shaft 210 rotates: the rotating shaft 210 drives the two cylinder guide rods 140 to rotate around the rotating shaft 210 as the central axis through the rear end plate 130. Since the two cylinder guide rods 140 are symmetrically distributed, they can ensure balanced support and guidance throughout the rotation process, preventing offset or swaying caused by uneven force on one side.

[0057] 2. Synchronous rotation of piston 150: As the cylinder guide rod 140 rotates, the piston 150 is also synchronously driven to rotate. This design ensures that even under complex compound motion (linear and rotational) conditions, the piston rod 160 can smoothly and accurately perform the predetermined action.

[0058] 3. Achieving the rotation of piston rod 160: The rotation of piston 150 ultimately drives piston rod 160 to rotate synchronously, so that piston rod 160 has the function of angle adjustment, and its rotational movement is independent of its linear movement.

[0059] Preferably, the piston 150 is equipped with a magnet (not shown in the figure), which is connected to an external sensor. The position of the piston 150 is identified by the real-time sensing of the position of the magnet. This not only achieves high-precision position feedback, but also significantly improves the overall automation control level of the equipment, reduces maintenance requirements, enhances adaptability and flexibility, and simplifies the structural design.

[0060] Preferably, an X-shaped sealing ring 151 is fitted on the outer peripheral wall of the piston 150. The piston 150 and the inner wall of the cylinder barrel 110 are sealed by the X-shaped sealing ring 151. Due to its unique shape design, the X-shaped sealing ring 151 can provide excellent sealing effect during the movement of the piston 150, effectively preventing gas leakage and ensuring the high efficiency and stability of the cylinder. In addition, the X-shaped sealing ring 151 has a certain self-adjusting ability, which can automatically compensate for the changes in sealing gap caused by wear or temperature changes to a certain extent, and maintain a long-term stable sealing effect.

[0061] In addition, compared to traditional O-rings, the X-ring 151 reduces frictional resistance during piston 150 movement while ensuring a good seal. This not only helps reduce energy consumption but also reduces wear and extends the service life of the seals and cylinder.

[0062] Preferably, the linear cylinder 100 also includes a cylinder front cover 170, which is sealed to the cylinder barrel 110. The cylinder front cover 170 has a central through hole through which the piston rod 160 passes. This design not only ensures effective isolation between the interior and exterior environment of the linear cylinder 100, but also provides guidance and support for the movement of the piston rod 160.

[0063] Furthermore, a support ring 180 is provided on the end face of the cylinder front cover 170 that is inserted into the cylinder barrel 110. The support ring 180 has a rotating groove, and the ends of the two cylinder guide rods 140 are inserted into the rotating groove. The rotating groove provides a clear rotation path for the cylinder guide rods 140, ensuring that they can rotate smoothly and accurately around the rotating shaft 210, while also enhancing the structural stability of the entire system.

[0064] The support ring 180 is preferably made of POM material, which is known for its excellent mechanical properties, wear resistance, low coefficient of friction and good dimensional stability.

[0065] Preferably, the control end of the swing cylinder 200 is equipped with an angle adjustment device (not shown in the figure), the angle adjustment device including an adjustment screw and an angle scale, wherein,

[0066] The adjusting screw is connected to the rotating part of the swing cylinder 200 to control the rotation of the shaft 210. This design allows the operator to fine-tune the rotation angle according to actual needs, thereby achieving precise angle positioning.

[0067] The angle dial is used to indicate the angle of rotation of the adjusting screw. It provides an intuitive visual feedback mechanism to help operators accurately set the required rotation angle and improve the precision of operation.

[0068] The technical means disclosed in this utility model are not limited to those described above, but also include technical solutions composed of any combination of the above technical features. The above are specific embodiments of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

[0069] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0070] Furthermore, in this utility model, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. The terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two elements or the interaction between two elements, unless otherwise explicitly specified. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0071] The technical solutions of the various embodiments of this utility model can be combined with each other, but only if they can be implemented by those skilled in the art. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the protection scope claimed by this utility model.

[0072] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A compact rotary cylinder, characterized in that, include: A linear cylinder, comprising: The cylinder barrel has a front end plate and a rear end plate at the front and rear ends of its inner cavity, respectively. A cylinder guide rod is disposed inside the cylinder barrel and its two ends are respectively connected to the front end plate and the rear end plate; A piston and a piston rod, wherein the piston is movably sleeved on the cylinder guide rod, and the piston rod is connected to the piston; When air enters the cylinder barrel, the airflow pushes the piston to move along the cylinder guide rod, causing the piston rod to move synchronously in a straight line; A swing cylinder is connected to the cylinder barrel by fasteners. The swing cylinder has a rotating shaft for in-situ rotation. The rotating shaft is connected to the rear end plate. As the rotating shaft rotates, it sequentially drives the cylinder guide rod, the piston, and the piston rod to rotate.

2. A compact rotary cylinder according to claim 1, characterized in that, The cylinder barrel has a first air inlet and a second air inlet on its side wall, which penetrate the inner cavity. The first air inlet is close to the rear end plate, and the second air inlet is close to the front end plate.

3. A compact rotary cylinder according to claim 2, characterized in that, When air enters through the first air inlet, the airflow pushes the piston and piston rod to move away from the swing cylinder. When air enters through the second air inlet, the airflow pushes the piston and the piston rod to move in the direction of the swing cylinder.

4. A compact rotary cylinder according to claim 1, characterized in that, The cylinder guide rods are provided in pairs and are symmetrically distributed along the axis of the rotating shaft.

5. A compact rotary cylinder according to claim 4, characterized in that, When the rotating shaft rotates, it drives the two cylinder guide rods to rotate around the rotating shaft as the central axis through the rear end plate. During the rotation, it drives the piston to rotate synchronously to realize the rotation of the piston rod.

6. A compact rotary cylinder according to claim 1, characterized in that, The piston is equipped with a magnet, which is connected to an external sensor. The position of the piston is identified by the sensor sensing the position of the magnet in real time.

7. A compact rotary cylinder according to claim 1, characterized in that, An X-shaped sealing ring is fitted on the outer peripheral wall of the piston, and the piston and the inner wall of the cylinder barrel are sealed by the X-shaped sealing ring.

8. A compact rotary cylinder according to claim 1, characterized in that, The linear cylinder also includes a cylinder front cover, which is sealed to the cylinder barrel, and the cylinder front cover has a central through hole through which the piston rod passes.

9. A compact rotary cylinder according to claim 8, characterized in that, The cylinder front cover is provided with a support ring on the end face of the cylinder barrel, and the support ring has a rotating groove, and the ends of the two cylinder guide rods are inserted into the rotating groove.

10. A compact rotary cylinder according to claim 1, characterized in that, The control end of the swing cylinder is equipped with an angle adjustment device, which includes an adjustment screw and an angle scale. The adjustment screw is connected to the rotating part of the swing cylinder to control the rotation of the shaft, and the angle scale is used to indicate the angle of rotation of the adjustment screw.

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