Telescopic rotary hydraulic cylinder

Abstract

The utility model discloses a telescopic rotary hydraulic cylinder which comprises a first cylinder body, a linear driving mechanism used for linear motion is arranged in the first cylinder body, the linear driving mechanism comprises a first piston and a first movable rod, and the first piston is arranged in the first cylinder body. A first movable rod is fixedly arranged on the surface of the first piston, the first movable rod penetrates through the first cylinder body and extends to the outer side of the first cylinder body, and a rotation driving mechanism used for rotating motion is arranged at one end of the first movable rod; and the rotation driving mechanism comprises a second cylinder body, a second piston, a second movable rod, a connecting sleeve, a driving column, a spiral driving groove, a clamping groove, a ball, a rotating shaft, a transmission column and a transmission sleeve. The hydraulic cylinder is good in using effect, the telescopic function and the rotating function of a traditional hydraulic cylinder are combined, the two functions can be operated independently, and therefore the application range of the hydraulic cylinder can be widened while the overall size of the hydraulic cylinder is reduced.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology, specifically a telescopic rotary hydraulic cylinder. Background Technology

[0002] As the core actuator of a hydraulic system, the hydraulic cylinder utilizes Pascal's principle to efficiently convert hydraulic energy into mechanical energy, driving the piston to complete linear reciprocating motion or oscillating motion. With its advantages of simple structure and reliable operation, the hydraulic cylinder has become a standard component in engineering machinery, industrial equipment, aerospace, and other fields, serving as a core actuator for achieving high-precision, high-load motion control.

[0003] In actual production scenarios, external components driven by hydraulic cylinders often face complex motion requirements—needing both linear displacement and synchronous or independent rotational movements. Existing technologies have proposed solutions to address this technical challenge, such as the "telescopic rotary hydraulic cylinder" disclosed in Chinese invention patent (application number: 201110256362.3), which uses a limiting pin within a helical guide groove to synchronously drive rotational motion during extension and retraction. However, this device exhibits a forced coupling between extension and rotation, making it impossible to decouple the motion according to working conditions—that is, it cannot perform extension or rotation functions independently. This design limitation restricts its application scenarios and makes it difficult to meet the diverse needs for motion freedom under complex working conditions. Therefore, an improved telescopic rotary hydraulic cylinder is needed to address this issue. Utility Model Content

[0004] The purpose of this invention is to provide a telescopic rotary hydraulic cylinder to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a telescopic rotary hydraulic cylinder, comprising a first cylinder body, wherein a linear drive mechanism for linear motion is disposed inside the first cylinder body, the linear drive mechanism comprising a first piston and a first movable rod, the first piston being disposed inside the first cylinder body, and the first movable rod being fixedly disposed on the surface of the first piston, the first movable rod extending through the first cylinder body to the outside of the first cylinder body, and a rotary drive mechanism for rotational motion being disposed at one end of the first movable rod, the rotary drive mechanism comprising a second cylinder body, a second piston, a second movable rod, a connecting sleeve, a drive column, a helical drive groove, a slot, a ball bearing, a rotating shaft, a transmission column, and a transmission sleeve, the first... A second cylinder is fixedly mounted at one end of a movable rod. A second piston is movably engaged at the temporal portion of the second cylinder. A second movable rod is fixedly mounted on the surface of the second piston. The second movable rod extends movably through the second cylinder to the outside of the second cylinder. A connecting sleeve is fixedly mounted on the outside of the second cylinder. A drive column is movably mounted at one end of the second movable rod. A spiral drive groove is formed on the outer surface of the drive column. A slot is fixedly mounted on the inner side wall of the connecting sleeve. A ball is movably engaged inside the slot. The ball is movably engaged inside the drive groove. A rotating shaft is movably mounted at one end of the connecting sleeve. A transmission column is fixedly mounted at one end of the drive column. A transmission sleeve is fixedly mounted on the surface of the rotating shaft.

[0006] Preferably, a first sealing ring is provided between the first cylinder body and the first movable rod, and a second sealing ring is provided between the second cylinder body and the second movable rod.

[0007] Preferably, a first hydraulic oil connection port is provided at both ends of the surface of the first cylinder.

[0008] Preferably, a connecting flange is fixedly provided at one end of the rotating shaft.

[0009] Preferably, a second hydraulic oil connection port is provided on both sides of the surface of the second cylinder.

[0010] Preferably, the cross-section of the transmission column and the transmission sleeve is rectangular.

[0011] Preferably, the transmission sleeve is movably sleeved on the outer surface of the transmission column.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. The linear drive and rotary drive of this utility model can operate independently, which can improve the applicability of this device. The applicable scope includes, but is not limited to, lifting machinery that requires intermittent rotation, agricultural equipment that requires independent extension and rotation, and robot joints that require compound motion, effectively improving the adaptability of this device to working conditions.

[0014] 2. The overall size of this utility model is compact. Compared with the traditional hydraulic cylinder, it only adds a connecting sleeve structure and does not have a complicated hydraulic rotation drive structure, which makes it easy to install and promote its use. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a telescopic rotary hydraulic cylinder according to the present invention;

[0016] Figure 2 This is a cross-sectional view of a telescopic rotary hydraulic cylinder according to the present invention.

[0017] Figure 3 This utility model relates to a telescopic rotary hydraulic cylinder. Figure 2 The front view;

[0018] Figure 4 This is an internal structural view of the connecting sleeve in a telescopic rotary hydraulic cylinder according to the present invention;

[0019] Figure 5 This is an overall structural view of the drive column in a telescopic rotary hydraulic cylinder according to this utility model.

[0020] In the diagram: 1. First cylinder; 2. First piston; 3. First movable rod; 4. Second cylinder; 5. Second piston; 6. Second movable rod; 7. Connecting sleeve; 8. Drive column; 9. Helical drive groove; 10. Slot; 11. Ball bearing; 12. Rotating shaft; 13. Transmission column; 14. Transmission sleeve; 15. First hydraulic oil connection port; 16. Second hydraulic oil connection port; 17. Connecting flange. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-5This utility model provides a technical solution: a telescopic rotary hydraulic cylinder, including a first cylinder body 1. The first cylinder body 1 has a linear drive mechanism for linear motion inside, the linear drive mechanism including a first piston 2 and a first movable rod 3. The first piston 2 is disposed inside the first cylinder body 1, and the first movable rod 3 is fixedly disposed on the surface of the first piston 2. The first movable rod 3 extends through the first cylinder body 1 to the outside of the first cylinder body 1. One end of the first movable rod 3 is provided with a rotary drive mechanism for rotational motion. The rotary drive mechanism includes a second cylinder body 4, a second piston 5, a second movable rod 6, a connecting sleeve 7, a drive column 8, a spiral drive groove 9, a slot 10, a ball bearing 11, a rotating shaft 12, a transmission column 13, and a transmission sleeve 14. One end of the first movable rod 3 is fixedly disposed with the second cylinder body 4, and the second piston 5 is movably engaged with the temporal portion of the second cylinder body 4. The second movable rod 6 is fixedly disposed on the surface of the second piston 5, and the second movable rod 6 movably passes through the second cylinder body 4. 4 extends to the outside of the second cylinder 4. A connecting sleeve 7 is fixedly installed on the outside of the second cylinder 4. A drive column 8 is movably installed at one end of the second movable rod 6. A spiral drive groove 9 is opened on the outer surface of the drive column 8. A slot 10 is fixedly installed on the inner side wall of the connecting sleeve 7. A ball 11 is movably engaged inside the slot 10. The ball 11 is movably engaged inside the drive groove. A rotating shaft 12 is movably installed at one end of the connecting sleeve 7. A transmission column 13 is fixedly installed at one end of the drive column 8. A transmission sleeve 14 is fixedly installed on the surface of the rotating shaft 12. The rotating shaft 12 and the connecting sleeve 7 of this device can be connected by a bearing or an annular groove so that the rotating shaft 12 can only rotate relative to the connecting sleeve 7 and cannot be displaced relative to it. Similarly, the drive column 8 and the second movable rod 6 of this device can also be connected by a bearing or an annular groove to ensure that the drive column 8 can only rotate relative to the second movable rod 6 and cannot be displaced relative to it.

[0023] A first sealing ring is provided between the first cylinder body 1 and the first movable rod 3, and a second sealing ring is provided between the second cylinder body 4 and the second movable rod 6. The sealing of the entire device can be ensured by the first sealing ring and the second sealing ring to prevent hydraulic oil leakage.

[0024] The first cylinder body 1 has two first hydraulic oil connection ports 15 at both ends of its surface. The device has two first hydraulic oil connection ports 15, which can pump hydraulic oil to both sides of the first piston 2 respectively. By pumping hydraulic oil in different directions, the first piston 2 and the first movable rod 3 can be pushed to move left and right. When the first piston 2 moves left and right, it can drive the first movable rod 3 and all the components connected to the second movable rod 6 to move linearly.

[0025] A connecting flange 17 is fixedly provided at one end of the rotating shaft 12. The rotating shaft 12 and the driving component of this device can be conveniently fixedly connected through the connecting flange 17, so that this device can drive the driving component to perform translational and rotational movements.

[0026] The second cylinder body 4 is provided with two second hydraulic oil connection ports 16 on both sides of its surface. The device is also provided with two second hydraulic oil connection ports 16, which can pump hydraulic oil to both sides of the second piston 5 respectively. By pumping hydraulic oil in different directions, the second piston 5 and the second movable rod 6 can be pushed to move left and right. The left and right movement of the second movable rod 6, in conjunction with the spiral drive groove 9 and the drive ball 11, can change the linear movement of the second movable rod 6 into the rotational movement of the rotating shaft 12 and the connecting flange 17.

[0027] The cross-sections of the transmission column 13 and the transmission sleeve 14 are rectangular. Since this device needs to transmit the rotational motion of the drive column 8 to the rotating shaft 12, the transmission column 13 and the transmission sleeve 14 need to be in a shape that can ensure power transmission.

[0028] The transmission sleeve 14 is movably sleeved on the outer surface of the transmission column 13. Since the rotation of the drive rotating shaft 12 converts the linear motion of the second movable rod 6 into rotational motion, the transmission column 13 needs to be movably sleeved inside the transmission sleeve 14 so that it can move left and right. It should be noted that since there are many drive structures in this device, in order to avoid unnecessary frictional wear, the device uses drive balls 11 to engage inside the drive groove. However, lubricating oil should also be applied inside the drive groove to ensure normal drive operation. At the same time, lubricating oil should also be applied to the outer surfaces of the transmission sleeve 14 and the transmission column 13.

[0029] Working principle: When using this device, the linear motion of this device is driven by the first piston 2. When the first piston 2 moves left and right, it can drive the first movable rod 3 and all the components connected to the second movable rod 6 to move linearly.

[0030] The rotary drive movement of this device converts the linear motion of the second movable rod 6 into the rotary motion of the rotating shaft 12. The principle is that when the second piston 5 moves left and right under the action of hydraulic oil, it pushes the drive column 8 to move left and right. Since the surface of the drive column 8 has a spiral groove, and the spiral groove is held by the ball 11, the force on the drive column 8 when it moves left and right includes both linear and circumferential (rotational) components, thus generating rotational motion. When the drive column 8 rotates, it can drive the rotating shaft 12 to rotate as well. In this way, this device can perform linear drive and rotary drive as needed, thereby improving the use effect of this device.

[0031] Meanwhile, the linear drive and rotary drive of this device can operate independently, which can reduce the overall size of the device and increase its applicability. The applicable scope includes, but is not limited to, lifting machinery that requires intermittent rotation, agricultural equipment that requires independent extension and rotation, and robot joints that require compound motion, effectively improving the device's adaptability to working conditions.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A telescopic rotary hydraulic cylinder, comprising a first cylinder body (1), characterized in that: The first cylinder (1) is provided with a linear drive mechanism for linear motion. The linear drive mechanism includes a first piston (2) and a first movable rod (3). The first piston (2) is provided inside the first cylinder (1). The first movable rod (3) is fixedly provided on the surface of the first piston (2). The first movable rod (3) passes through the first cylinder (1) and extends to the outside of the first cylinder (1). One end of the first movable rod (3) is provided with a rotary drive mechanism for rotational motion. The rotary drive mechanism includes a second cylinder (4), a second piston (5), a second movable rod (6), a connecting sleeve (7), a drive column (8), a spiral drive groove (9), a slot (10), a ball (11), a rotating shaft (12), a transmission column (13), and a transmission sleeve (14). One end of the first movable rod (3) is fixedly provided with a second cylinder (4). (4) A second piston (5) is provided in the temporal region. A second movable rod (6) is fixedly provided on the surface of the second piston (5). The second movable rod (6) extends through the second cylinder (4) to the outside of the second cylinder (4). A connecting sleeve (7) is fixedly provided on the outside of the second cylinder (4). A drive column (8) is movably provided at one end of the second movable rod (6). A spiral drive groove (9) is opened on the outer surface of the drive column (8). A slot (10) is fixedly provided on the inner side wall of the connecting sleeve (7). A ball (11) is movably engaged inside the slot (10). The ball (11) is movably engaged inside the drive groove. A rotating shaft (12) is movably provided at one end of the connecting sleeve (7). A transmission column (13) is fixedly provided at one end of the drive column (8). A transmission sleeve (14) is fixedly provided on the surface of the rotating shaft (12).

2. The telescopic rotary hydraulic cylinder according to claim 1, characterized in that: A first sealing ring is provided between the first cylinder (1) and the first movable rod (3), and a second sealing ring is provided between the second cylinder (4) and the second movable rod (6).

3. A telescopic rotary hydraulic cylinder according to claim 1, characterized in that: The first cylinder body (1) has a first hydraulic oil connection port (15) at both ends of its surface.

4. A telescopic rotary hydraulic cylinder according to claim 1, characterized in that: A connecting flange (17) is fixedly provided at one end of the rotating shaft (12).

5. A telescopic rotary hydraulic cylinder according to claim 1, characterized in that: The second cylinder (4) has a second hydraulic oil connection port (16) on both sides of its surface.

6. A telescopic rotary hydraulic cylinder according to claim 1, characterized in that: The cross-sections of the transmission column (13) and the transmission sleeve (14) are rectangular.

7. A telescopic rotary hydraulic cylinder according to claim 1, characterized in that: The transmission sleeve (14) is movably sleeved on the outer surface of the transmission column (13).

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