Swing type hydraulic oil cylinder
By designing a swing-type hydraulic cylinder, the output shaft angle adjustment is controlled by the oil inlet and the spring is limited, which solves the problem that the existing hydraulic cylinder cannot adjust the output shaft angle, and achieves the effects of adjustable angle and anti-collision.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NINGBO XINHONG HYDRAULIC
- Filing Date
- 2025-05-22
- Publication Date
- 2026-05-12
AI Technical Summary
Existing hydraulic cylinders cannot control the swing angle of the output shaft, resulting in inconvenience and significant limitations in their use.
A swing-type hydraulic cylinder was designed. The swing angle of the output shaft is adjusted by controlling the pressure of the oil inlet under the cover plate, and the swing angle is limited by a spring to prevent the piston rod from colliding with the cylinder wall.
The adjustable output shaft angle is achieved, improving applicability, and the spring buffer prevents collisions and ensures motion stability.
Smart Images
Figure CN224228986U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of hydraulic cylinder technology, and in particular to a swing-type hydraulic cylinder. Background Technology
[0002] A hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy, performing linear reciprocating or oscillating motion. It has a simple structure and reliable operation. When used to achieve reciprocating motion, it eliminates the need for a speed reduction device, has no transmission backlash, and provides smooth movement. As a power device, hydraulic cylinders are widely used in the hydraulic systems of various machines. Currently, existing hydraulic cylinders cannot control the oscillation angle of the output shaft, meaning the working angle cannot be adjusted, resulting in significant limitations and inconvenience in use. Utility Model Content
[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a swing-type hydraulic cylinder.
[0004] The purpose of this utility model is achieved through the following technical solution: a swing-type hydraulic cylinder includes a cylinder body, a piston rod is provided in the cylinder body, a limit groove is opened on the piston rod, a limit block is provided in the limit groove, the limit block is provided at the upper end of the output shaft, a transmission rocker arm is provided at the end of the output shaft, a cover plate a and a cover plate b are respectively provided at both ends of the cylinder body, an oil inlet is opened below the cover plate a and the cover plate b is provided with a spring, and the spring is sleeved on the outside of one end of the piston rod.
[0005] Preferably, a stepped hole is provided in the cover plate b, and one end of the spring is located on the step of the stepped hole.
[0006] Preferably, both cover plate a and cover plate b are fixedly installed on the cylinder block by bolts.
[0007] Preferably, the transmission rocker arm has a through hole, the end of the piston rod has a groove, a protrusion is provided in the groove, the end of the piston rod and the protrusion are both located in the through hole, and a locking hole is provided below the transmission rocker arm, which is connected to the through hole.
[0008] Preferably, spring washers are provided at both ends of the spring, with one end of the spring washer located on the step of the stepped hole and the other end of the spring washer located on the end face of the cylinder body.
[0009] This utility model has the following advantages: By controlling the oil inlet pressure of the oil inlet holes under cover plate a and cover plate b, this utility model controls the swing angle of the output shaft, thereby adjusting the working angle and improving applicability. At the same time, the swing angle is limited by the spring, and the spring can also play a buffering role to prevent the piston rod from colliding with the cylinder wall. Attached Figure Description
[0010] Figure 1A schematic diagram of the structure of an explosion of a swing-type hydraulic cylinder;
[0011] Figure 2 A cross-sectional structural schematic diagram of a swing-type hydraulic cylinder;
[0012] Figure 3 This is a schematic diagram illustrating the principle of a swing-type hydraulic cylinder.
[0013] Figure 4 This is a side view of the structure of a swing-type hydraulic cylinder.
[0014] Figure 5 This is a structural diagram showing the location of the oil inlet hole;
[0015] In the diagram, 1-cover plate a, 2-cylinder body, 3-piston rod, 4-transmission rocker arm, 5-locking screw, 6-output shaft, 7-spring washer, 8-spring, 9-cover plate b, 10-limiting groove, 11-limiting block, 12-through hole, 13-groove, 14-protrusion, 15-oil inlet, 16-locking hole. Detailed Implementation
[0016] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.
[0017] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0018] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.
[0019] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0020] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0021] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0022] In this embodiment, as Figure 1 , Figure 2 , Figure 4 and Figure 5As shown, a swing-type hydraulic cylinder includes a cylinder body 2, a piston rod 3 disposed inside the cylinder body 2, a limit groove 10 formed on the piston rod 3, a limit block 11 disposed within the limit groove 10, the limit block 11 disposed on the upper end of an output shaft 6, a transmission rocker arm 4 disposed at the end of the output shaft 6, and cover plates a1 and b9 respectively disposed at both ends of the cylinder body 2. Preferably, cover plates a1 and b9 are both fixedly mounted on the cylinder body 2 by bolts. An oil inlet hole 15 is provided below cover plates a1 and b9, and a spring 8 is disposed inside cover plate b9. Specifically, a stepped hole is provided inside cover plate b9, one end of the spring 8 is located on the step of the stepped hole, and the spring 8 is fitted outside one end of the piston rod 3. Further, spring washers 7 are provided at both ends of the spring 8, one end of the spring washer 7 is located on the step of the stepped hole, and the other end of the spring washer 7 is located on the end face of the cylinder body 2. By controlling the oil inlet pressure of the oil inlet holes 15 under cover plate a1 and cover plate b9, the swing angle of the output shaft 6 is controlled, thereby adjusting the working angle and improving applicability. Specifically, the oil inlet hole 15 on cover plate a1 is set as port A, and the oil inlet hole 15 on cover plate b9 is set as port B. When oil enters through port A, it pushes the piston rod 3 to move to the right (towards port B), compressing the spring 8. At this time, the limiting groove 10 and the limiting block 11 cooperate to drive the output shaft 6 to rotate, which in turn drives the transmission rocker arm 4 to swing. Finally, the transmission rocker arm 4 drives the simple robotic arm outside to swing to one side, completing the function. When oil enters through port B, it pushes the piston rod 3 to move to the left (towards port A), compressing the spring 8. At this time, the limiting groove 10 and the limiting block 11 cooperate to drive the output shaft 6 to rotate, which in turn drives the transmission rocker arm 4 to swing. Finally, the transmission rocker arm 4 drives the simple robotic arm outside to swing to the other side, completing the function. Figure 3 As shown, the maximum swing amplitude of the transmission rocker arm 4 to both sides is 45°. The swing angle is limited by the spring 8, and the spring 8 also acts as a buffer to prevent the piston rod 3 from colliding with the cylinder wall. In this embodiment, the simplified robotic arm is an existing robotic arm, and no improvements have been made to it, so it will not be described in detail here.
[0023] In this embodiment, the transmission rocker arm 4 has a through hole 12, and the end of the piston rod 3 has a groove 13. A protrusion 14 is provided in the groove 13. Both the end of the piston rod 3 and the protrusion 14 are located in the through hole 12. A locking hole 16 is provided below the transmission rocker arm 4, and the locking hole 16 communicates with the through hole 12. Specifically, when the transmission rocker arm 4 is installed on the output shaft 6, the locking screw 5 is installed in the locking hole 15, and the end of the locking screw 5 abuts against the output shaft 6. Under the action of the locking screw 5 and the protrusion 14, the output shaft 6 is prevented from spinning freely in the through hole 12, thereby ensuring that the output shaft 6 can better drive the transmission rocker arm 4 to swing.
[0024] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A swing-type hydraulic cylinder, characterized in that: The cylinder includes a cylinder body (2), a piston rod (3) is provided inside the cylinder body (2), a limit groove (10) is provided on the piston rod (3), a limit block (11) is provided in the limit groove (10), the limit block (11) is provided on the upper end of the output shaft (6), a transmission rocker arm (4) is provided at the end of the output shaft (6), a cover plate a (1) and a cover plate b (9) are provided at both ends of the cylinder body (2), an oil inlet hole (15) is provided below the cover plate a (1) and the cover plate b (9), a spring (8) is provided inside the cover plate b (9), and the spring (8) is fitted on the outside of one end of the piston rod (3).
2. The swing-type hydraulic cylinder according to claim 1, characterized in that: The cover plate b (9) has a stepped hole, and one end of the spring (8) is located on the step of the stepped hole.
3. The swing-type hydraulic cylinder according to claim 2, characterized in that: Both cover plate a (1) and cover plate b (9) are fixedly installed on the cylinder body (2) by bolts.
4. The swing-type hydraulic cylinder according to claim 3, characterized in that: The transmission rocker arm (4) has a through hole (12), the end of the piston rod (3) has a groove (13), a protrusion (14) is provided in the groove (13), the end of the piston rod (3) and the protrusion (14) are both located in the through hole (12), and a locking hole (16) is provided below the transmission rocker arm (4), the locking hole (16) is connected to the through hole (12).
5. The swing-type hydraulic cylinder according to claim 4, characterized in that: Both ends of the spring (8) are provided with spring washers (7), one end of the spring washer (7) is located on the step of the stepped hole, and the other end of the spring washer (7) is located on the end face of the cylinder (2).