Telescopic plane rotating structure and air cylinder
Through the combined structure of the limit sleeve, front piston rod and rear piston rod, the existing cylinders have large volume, complex control and poor positioning accuracy, and the smooth composite movement of the cylinders in the same horizontal plane is achieved, which expands the application scenario and reduces costs.
Patent Information
- Application Number
- CN202422661726.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-31
- Publication Date
- 2025-08-05
- Estimated Expiration
- 2034-10-31
AI Technical Summary
The existing telescopic rotary cylinders have large volume, complex control and poor repeat positioning accuracy, making it difficult to achieve flexible rotation in the same horizontal plane, limiting their application in the field of high-demand production.
The combination structure of the limit sleeve, front piston rod and rear piston rod is adopted. Through pin fixing, the telescopic and plane rotation are achieved, the number of control ports is reduced, and the expansion and rotation functions are integrated in the same horizontal plane.
The smooth composite movement of the cylinder in the same horizontal plane is achieved, the repeat positioning accuracy is improved, the cylinder volume and control complexity is reduced, the application scenario is expanded, and the production cost is reduced.
Smart Images
Figure CN223190733U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of cylinders, in particular to a telescopic plane rotation structure and a cylinder. Background Art
[0002] The telescopic function of pneumatic cylinders is well established in modern industrial production. This movement is typically achieved by applying compressed gas pressure to push a piston rod within the cylinder. This relatively simple and reliable process is widely used in various automated equipment and mechanical systems. However, with the continuous advancement of production processes, simple linear motion cylinders are no longer sufficient for certain specific applications. In many production scenarios, cylinders are required not only to achieve telescopic movement but also to rotate within the same horizontal plane.
[0003] However, existing telescopic rotary cylinders often have the following problems: First, they are large in size, which is not conducive to application in space-constrained environments. Second, the large number of control ports increases the complexity and failure rate of the control system. In addition, the repeatability accuracy of this type of cylinder is relatively poor, making it difficult to meet the needs of high-precision industrial applications. Furthermore, due to the structural design limitations of the cylinder, it is often unable to achieve flexible rotational motion within the same horizontal plane, which greatly limits its application potential in automated equipment. These problems have greatly restricted the application of telescopic rotary cylinders in certain high-demand production fields, and there is an urgent need for innovation in cylinder design and control systems to improve their applicability and performance in complex production environments. Utility Model Content
[0004] In view of at least one of the above technical problems, the present invention provides a telescopic plane rotation structure and a cylinder, which adopt a new structure to achieve telescopic and rotational motion.
[0005] According to a first aspect of the present invention, there is provided a telescopic plane rotation structure, comprising:
[0006] A limiting sleeve, wherein a limiting groove is provided on a side wall of the limiting sleeve, and the limiting groove is provided with a corner;
[0007] The front piston rod comprises a moving rod and a connecting sleeve coaxially fixed to the moving rod, the moving rod passes through the limiting sleeve, the connecting sleeve is relatively slidable in the limiting sleeve, and the side wall of the connecting sleeve has a first pin adapted to the limiting groove and a rotating groove arranged axially inclined;
[0008] a rear piston rod, which is relatively movably arranged in the connecting sleeve, and has a second pin protruding from the rotation groove and movably arranged in the rotation groove;
[0009] Wherein, the rear piston rod, the front piston rod and the limiting sleeve are sequentially mounted.
[0010] In some embodiments of the present invention, the limiting sleeve has two limiting grooves arranged opposite to each other.
[0011] In some embodiments of the present invention, the limiting groove includes a first sub-groove and a second sub-groove, the first sub-groove extends circumferentially, and the second sub-groove extends axially.
[0012] In some embodiments of the present invention, the angle between the first sub-groove and the second sub-groove is 90 degrees, and the length of the first sub-groove is smaller than the length of the second sub-groove.
[0013] In some embodiments of the present invention, a connecting piece is provided on the top of the front piston rod for connecting to a workpiece to be rotated.
[0014] According to a second aspect of the present invention, a cylinder is further provided, comprising the telescopic plane rotation structure as described above, wherein the limiting sleeve is fixed inside the cylinder body.
[0015] In some embodiments of the present invention, a piston ring is provided on the rear piston rod, and the diameter of the piston ring is adapted to the inner diameter of the cylinder body.
[0016] In some embodiments of the present invention, the piston ring divides the cylinder body into a front chamber and a rear chamber, the end chamber where the front piston rod is located is the front chamber, and the end chamber where the rear piston rod is located is the rear chamber.
[0017] In some embodiments of the present invention, the cylinder is provided with a front air port, and the front air port is arranged within the stroke range of the limiting sleeve and communicates with the front chamber.
[0018] In some embodiments of the present invention, the cylinder is further provided with a rear end air port, which is provided at the bottom of the cylinder and communicates with the rear chamber.
[0019] The beneficial effects of this utility model are as follows: by fixing the limit sleeve, front piston rod, and rear piston rod with pins, a telescopic and planar rotation structure is formed. Not only does the rotational movement complete at the same level, achieving zero rotation stroke, but the movement process is smooth and the repeatable positioning accuracy is high. Applying this structure to the cylinder reduces the number of control ports and the cylinder volume, thereby improving the cylinder's applicability, expanding its application scenarios, and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0021] Figure 1 This is a structural diagram of the telescopic plane rotation structure in an embodiment of the present utility model;
[0022] Figure 2 This is a schematic structural diagram of a limit sleeve in an embodiment of the present utility model;
[0023] Figure 3 This is a structural diagram of the front piston rod in an embodiment of the present utility model;
[0024] Figure 4 This is a structural diagram of the rear piston rod in an embodiment of the present utility model;
[0025] Figure 5 This is a structural diagram of the front piston rod with a connecting piece in an embodiment of the present utility model;
[0026] Figure 6 This is a structural diagram of a rear piston rod with a piston ring in an embodiment of the present utility model;
[0027] Figure 7 This is a schematic structural diagram of the cylinder in the embodiment of the present utility model;
[0028] Figure 8 In the embodiment of the present utility model Figure 7 Middle AA section view.
[0029] Explanation of the accompanying drawings: 1. Limiting sleeve; 11. Limiting groove; 111. First sub-groove; 112. Second sub-groove; 2. Front piston rod; 21. Moving rod; 22. Connecting sleeve; 221. First pin; 222. Rotating groove; 23. Connecting piece; 3. Rear piston rod; 31. Second pin; 32. Piston ring; 4. Cylinder; 41. Front chamber; 42. Rear chamber; 43. Front air port; 44. Rear air port. DETAILED DESCRIPTION
[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.
[0031] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly attached to the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.
[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which this invention pertains. The terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit this invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0033] like Figures 1 to 8 The telescopic plane rotation structure shown includes: a limiting sleeve 1, a front piston rod 2 and a rear piston rod 3. A limiting groove 11 is provided on the side wall of the limiting sleeve 1, and the limiting groove 11 is provided with a corner; the front piston rod 2 includes a moving rod 21 and a connecting sleeve 22 coaxially fixed to the moving rod 21, the moving rod 21 passes through the limiting sleeve 1, and the connecting sleeve 22 can be relatively slidably arranged in the limiting sleeve 1, and the side wall of the connecting sleeve 22 has a first pin 221 adapted to the limiting groove 11 and a rotation groove 222 arranged axially inclined; the rear piston rod 3 can be relatively movably arranged in the connecting sleeve 22, and the rear piston rod 3 has a second pin 31 protruding from the rotation groove 222 and movably arranged in the rotation groove 222; wherein, the rear piston rod 3, the front piston rod 2 and the limiting sleeve 1 are sequentially sleeved. As shown Figures 1 to 4As shown, the limiting sleeve 1 serves as a guide and limiter. The sidewall of the limiting sleeve 1 is also provided with a limiting groove 11, which cooperates with a pin to enable movement of the front piston rod 2 and rear piston rod 3 in a specific direction. The sidewall of the connecting sleeve 22 on the front piston rod 2 is provided with a first pin 221 and a rotation groove 222. The first pin 221 mates with the limiting groove 11 and is used to drive the movement or rotation of the front piston rod 2, preventing the front piston rod 2 from moving beyond the predetermined range within the limiting sleeve 1. The rotation groove 222 is arranged at an angle on the connecting sleeve 22, guiding the movement of the front piston rod 2 and rear piston rod 3, thereby achieving a combined rotational and telescopic motion. The second pin 31 on the rear piston rod 3 protrudes from the rotation groove 222 on the front piston rod 2 and is movable within the rotation groove 222, enabling the rear piston rod 3 to move within the limited direction of the rotation groove 222, achieving both telescopic and planar rotation. During the specific movement process, the first pin 221 and the second pin 31 push the connecting sleeve 22 to slide in the limiting sleeve 1 under the action of external force, thereby realizing the linear movement of the front piston rod 2 and the rear piston rod 3. When the front piston rod 2 moves toward the moving rod 21, the first pin 221 moves linearly to the corner. Under the action of the second pin 31, the rotation groove 222 and the limiting groove 11, the first pin 221 rotates to the corner end to realize the rotation of the front piston rod 2. During the reverse movement, the first pin 221 rotates to drive the front piston rod 2 to rotate. Under the action of the rotation groove 222 and the limiting groove 11, the second pin 31 moves in the direction pointing to the rear piston rod 3, driving the front piston rod 2 to move linearly. What we need to understand here is that the structure of the utility model is simple, mainly consisting of a limit sleeve 1, a front piston rod 2, a rear piston rod 3 and a pin, and the telescopic and rotation functions are integrated in the same cylinder 4, saving space, reducing structural complexity, reducing production costs while meeting more application requirements; due to the precise design of the rotation groove 222 and the limit groove 11, the cylinder 4 can maintain a smooth motion trajectory during the telescopic and rotation process, reducing vibration and wear, and extending the service life of the equipment.
[0034] In some embodiments of the present invention, the limiting sleeve 1 has two limiting grooves 11 arranged opposite to each other. Figure 2 As shown, the relative arrangement of the two limiting grooves 11 can balance the forces acting on the assembly as it moves within the limiting sleeve 1, making the structure more stable during movement and preventing deviation or jamming caused by unilateral forces. Furthermore, the relative arrangement of the limiting grooves 11 can enhance unidirectional guidance, facilitating precise planar rotation or linear motion.
[0035] Furthermore, the limiting groove 11 includes a first sub-groove 111 and a second sub-groove 112. The first sub-groove 111 extends circumferentially, and the second sub-groove 112 extends axially. Figure 2The circumferentially extending first slot 111 guides the structure's in-plane rotational motion, while the axially extending second slot 112 guides the assembly's linear motion along the axial direction. This allows for flexible control and precise limitation of the structure's combined motion, with the first slot 111 controlling the structure's rotational range and the second slot 112 controlling the assembly's telescopic range.
[0036] Based on the above embodiment, the angle between the first slot 111 and the second slot 112 is 90 degrees, and the length of the first slot 111 is less than the length of the second slot 112. Figure 2 The angle between the first slot 111 and the second slot 112 is 90 degrees, and they are perpendicular to each other. This setting ensures that the structure is effectively constrained during rotation and translation movement and does not interfere with each other. The first slot 111 limits the rotation angle of the structure so that the structure can only rotate within a specific range to prevent excessive rotation. The second slot 112 achieves a larger range of linear movement, allowing for larger telescopic operations in the axial direction. This setting provides the structure with a highly flexible motion control function, which is particularly suitable for situations where precise and limited range rotation and telescopic movements are required.
[0037] In some embodiments of the present invention, a connecting piece 23 is provided on the top of the front piston rod 2 for connecting to the workpiece to be rotated. Figure 5 As shown, the shape of connector 23 matches the connection portion of the workpiece. A convex, concave, or other joint design can be used to ensure a reliable mechanical connection between the workpiece and connector 23, such as a flange, a ball joint, or a snap-on connector 23. The front piston rod 2 generates rotational motion through the rotation groove 222, and connector 23 directly transmits this rotational motion to the workpiece, achieving rotation of the workpiece. To reduce impact and vibration during rotational motion, connector 23 may include some shock-absorbing structure or material, such as a rubber gasket, buffer, or other shock-absorbing element, which helps improve the motion accuracy of the workpiece and the overall life of the system.
[0038] In the second aspect of the present invention, there is also provided a cylinder 4, comprising the telescopic plane rotation structure as described above, wherein the limiting sleeve 1 is fixed in the main body of the cylinder 4. Figures 6 to 8 As shown, the main body of cylinder 4 integrates the aforementioned telescopic and planar rotation structure. The stop sleeve 1 is fixed within the main body of cylinder 4, allowing cylinder 4 to utilize the guiding and limiting functions of the stop sleeve 1 to achieve a combined motion of both telescopic and rotatable movement. The stop sleeve 1 can also be fixed within cylinder 4 using pins. The telescopic and planar rotation functions are integrated into a single cylinder 4, reducing the need for additional equipment and space usage.
[0039] Specifically, a piston ring 32 is provided on the rear piston rod 3, and the diameter of the piston ring 32 is adapted to the inner diameter of the main body of the cylinder 4. Figure 6 and Figure 8 As shown, the matching of piston ring 32 and the inner diameter of the cylinder body 4 ensures stable movement and sealing of piston ring 32 within cylinder 4. When cylinder 4 is filled with gas, the pressure exerted on piston ring 32 pushes rear piston rod 3 along the inner wall of cylinder 4. This thrust is evenly distributed across the entire bearing surface of piston ring 32, avoiding localized stress concentration and wear, and improving system durability. Of course, to further enhance sealing performance, sealing rings, such as O-rings, V-rings, or U-rings, can be added to piston ring 32. These sealing rings can effectively seal between piston ring 32 and the inner wall of cylinder 4, preventing leakage of working medium from both sides of piston ring 32.
[0040] Furthermore, the piston ring 32 divides the main body of the cylinder 4 into a front chamber 41 and a rear chamber 42. The end chamber where the front piston rod 2 is located is the front chamber 41, and the end chamber where the rear piston rod 3 is located is the rear chamber 42. Figure 8 As shown, piston ring 32 clings tightly to the cylinder 4 wall and seals against it, ensuring tightness between front chamber 41 and rear chamber 42. Front chamber 41 primarily accommodates the telescopic and rotational movement of front piston rod 2, and controls the pressure in front chamber 41 to drive axial movement of the piston rod. Pressure in rear chamber 42 drives movement of rear piston rod 3. The media in front chamber 41 and rear chamber 42 do not interfere with each other, ensuring stability during cylinder 4 movement.
[0041] Furthermore, the cylinder 4 is provided with a front air port 43, which is arranged within the stroke range of the limit sleeve 1 and communicates with the front chamber 41. Figure 7 and Figure 8 As shown, the front air port 43 is located within the travel range of the limit sleeve 1 and communicates with the front chamber 41, allowing the medium to act directly on the front piston rod 2. When the medium enters the front chamber 41 through the front air port 43, the pressure in the front chamber 41 is increased, pushing the front piston rod 2 to move. This arrangement enhances the control accuracy and operational flexibility of the cylinder 4, providing effective support for the complex movements of the cylinder 4.
[0042] On the basis of the above embodiment, the cylinder 4 is further provided with a rear end air port, which is provided at the bottom of the cylinder 4 and communicates with the rear chamber 42. Figure 7 and Figure 8The rear air port is located at the bottom of the cylinder 4 to facilitate the direct entry or exit of the medium, quickly adjusting the pressure of the rear chamber 42. When the medium enters the rear chamber 42 through the rear air port, the pressure in the rear chamber 42 is increased, thereby pushing the rear piston rod 3 toward the front chamber 41; when the medium is discharged, the pressure in the rear chamber 42 is reduced, allowing the rear piston rod 3 to move in the opposite direction.
[0043] The front air port 43 cooperates with the rear air port to realize bidirectional motion control of the piston rod in the cylinder 4 by adjusting the media of the front chamber 41 and the rear chamber 42 respectively, thereby realizing precise extension and rotation functions, and enabling the cylinder 4 to realize smooth and complex compound motion.
[0044] Those skilled in the art should understand that the present invention is not limited to the above-described embodiments. The above-described embodiments and the specification are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.
Claims
1. A telescopic plane rotation structure, characterized in that: include: A limiting sleeve, wherein a limiting groove is provided on a side wall of the limiting sleeve, and the limiting groove is provided with a corner; The front piston rod comprises a moving rod and a connecting sleeve coaxially fixed to the moving rod, the moving rod passes through the limiting sleeve, the connecting sleeve is relatively slidable in the limiting sleeve, and the side wall of the connecting sleeve has a first pin adapted to the limiting groove and a rotating groove arranged axially inclined; a rear piston rod, which is relatively movably arranged in the connecting sleeve, and has a second pin protruding from the rotation groove and movably arranged in the rotation groove; Wherein, the rear piston rod, the front piston rod and the limiting sleeve are sequentially mounted.
2. The telescopic plane rotation structure according to claim 1, characterized in that: The limiting sleeve is provided with two limiting grooves arranged opposite to each other.
3. The telescopic plane rotation structure according to claim 2, characterized in that: The limiting groove includes a first sub-groove and a second sub-groove, the first sub-groove extends circumferentially, and the second sub-groove extends axially.
4. The telescopic plane rotation structure according to claim 3, characterized in that: The angle between the first sub-slot and the second sub-slot is 90 degrees, and the length of the first sub-slot is smaller than the length of the second sub-slot.
5. The telescopic plane rotation structure according to claim 1, characterized in that: A connecting piece is provided on the top of the front piston rod for connecting to a workpiece to be rotated.
6. A cylinder, characterized in that: It comprises the telescopic plane rotation structure according to any one of claims 1 to 5, wherein the limiting sleeve is fixed in the cylinder body.
7. The cylinder according to claim 6, characterized in that The rear piston rod is provided with a piston ring, and the diameter of the piston ring is adapted to the inner diameter of the cylinder body.
8. The cylinder according to claim 7, characterized in that The piston ring divides the cylinder body into a front chamber and a rear chamber. The end chamber where the front piston rod is located is the front chamber, and the end chamber where the rear piston rod is located is the rear chamber.
9. The cylinder according to claim 8, characterized in that The cylinder is provided with a front air port, and the front air port is arranged within the stroke range of the limiting sleeve and communicates with the front chamber.
10. The cylinder according to claim 9, characterized in that The cylinder is further provided with a rear end air port, which is arranged at the bottom of the cylinder and communicates with the rear chamber.