An electric cylinder with a shock-absorbing function

Abstract

The present invention discloses an electric cylinder with a shock-absorbing function, which comprises a cylinder body. The cylinder body is a closed cylinder. An activity sleeve is arranged inside the cylinder body. The upper end of the activity sleeve is telescopically connected with a piston rod. A central screw rod is rotatably arranged at the axis inside the cylinder body. The central screw rod penetrates through the activity sleeve and is accommodated inside the piston rod. Connecting disks are respectively arranged above and below inside the activity sleeve. A plurality of rotatable side screw rods are circumferentially distributed between the two connecting disks. Each side screw rod is in threaded engagement with the central screw rod. The piston rod is fixed to the upper connecting disk. Support rings are fixed to the upper and lower ends of the activity sleeve. Support springs are respectively arranged between the connecting disk and the support ring at the same end. Compared with the prior art, the electric cylinder with a shock-absorbing function in the present invention can significantly improve the performance and efficiency of equipment in the applications in the industrial and mechanical fields, and simultaneously enhance the safety and stability of the working environment.

Description

Technical Field

[0001] The present invention relates to the technical field of controlling mechanical devices, and specifically to an electric cylinder with a shock-absorbing function. Background Art

[0002] In the fields of industrial automation and machinery, shock-absorbing electric cylinders, as an important actuator, play a key role. It combines the precise control of electric actuators and the stability of shock-absorbing systems, and is widely used in various automated equipment and production lines.

[0003] Shock-absorbing electric cylinders can be used to control the movement, positioning, and assembly of workpieces to ensure the efficiency and precision of the production process. In the warehousing and logistics industries, shock-absorbing electric cylinders can be used to control the lifting, transportation, and sorting of goods to achieve automated logistics operations. In the aerospace and automotive manufacturing fields, shock-absorbing electric cylinders are used for components such as the landing gear and cabin doors of aircraft, as well as assembly operations on automotive production lines.

[0004] Through precise control and stable movement, shock-absorbing electric cylinders can accelerate the production process and reduce production costs. Shock-absorbing electric cylinders can ensure stable operation of equipment, reduce errors and failures, and improve product quality and consistency. Shock-absorbing electric cylinders can reduce vibration and impact during equipment operation, reduce the danger of the working environment, and ensure the safety of operators.

[0005] Although shock-absorbing electric cylinders are widely used in the field of automation, there are still some technical challenges and deficiencies: in some application scenarios with high precision and high-speed movement, existing shock-absorbing electric cylinders may face challenges in terms of precision and stability and need further improvement. Many traditional shock-absorbing electric cylinders mainly focus on providing compressive elastic force and lack tensile elastic force. In some application scenarios, especially under working conditions that require bearing tensile force, this may lead to poor shock-absorbing effects or even fail to meet the requirements of the equipment. The existing design of shock-absorbing electric cylinders has poor effects in radial shock absorption. In some cases where shock absorption of the radial movement of working components is required, existing shock-absorbing electric cylinders may not provide sufficient shock-absorbing effects, thus affecting the stability and operation efficiency of the equipment. In some working environments, especially in applications that require bearing lateral impact or vibration, existing shock-absorbing electric cylinders may lack sufficient lateral stability, resulting in unstable or unpredictable situations during equipment operation.

[0006] These drawbacks limit the application of shock-absorbing electric cylinders in some specific fields, and at the same time highlight the need for further improvement and innovation in the design and manufacture of shock-absorbing electric cylinders. The present invention is committed to solving these problems to improve the performance and application scope of shock-absorbing electric cylinders. Therefore, it is necessary to provide an electric cylinder with a shock-absorbing function to solve the problems raised in the above background art. Summary of the Invention

[0007] To achieve the above object, the present invention provides the following technical solution: An electric cylinder with a shock-absorbing function, including a cylinder body, the cylinder body is a closed cylinder, an activity sleeve is arranged in the cylinder body, the upper end of the activity sleeve is telescopically connected with a piston rod, a central screw rod is rotatably arranged at the axis in the cylinder body, and the central screw rod penetrates through the activity sleeve and is accommodated in the piston rod;

[0008] Connection discs are respectively arranged above and below in the activity sleeve, and a plurality of rotatable side screw rods are circumferentially distributed between the two connection discs, and each side screw rod is in threaded engagement with the central screw rod, and the piston rod is fixed to the upper connection disc;

[0009] Support rings are fixed at the upper and lower ends of the activity sleeve, and support springs are respectively arranged between the connection disc at the same end and the support ring.

[0010] Further, as a preference, a base is fixed at the bottom of the cylinder body, the central screw rod penetrates into the base, a driving motor is connected to one side of the base, synchronous pulleys are respectively connected to the driving motor and the central screw rod, the two synchronous pulleys are connected by a synchronous belt, and the central screw rod and the synchronous pulley are slidably and rotationally restrictedly connected through a sliding spline.

[0011] Further, as a preference, a buffer pad is arranged below the synchronous pulley at the bottom of the central screw rod.

[0012] Further, as a preference, the inner wall of the cylinder body has an internal thread, the outer wall of the activity sleeve has an external thread, and the activity sleeve is threadedly connected into the cylinder body.

[0013] Further, as a preference, synchronous gears are fixed at the upper and lower ends of the side screw rod, and transmission gears meshing with each synchronous gear are respectively arranged in the connection discs;

[0014] Further, as a preference, the inner wall of the activity sleeve is a toothed ring meshing with the transmission gear.

[0015] Further, as a preference, a plurality of side springs are circumferentially and fixedly arranged in the inner wall of the activity sleeve between the connection disc at the same end and the support spring, a frustum is fixed on the surface of the connection disc away from the side screw rod, and the side spring is attached to the frustum.

[0016] Further, as a preference, the piston rod and the cylinder body are slidably and rotationally restrictedly connected through a spline.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] Through the support spring and side spring system, the vibration and impact of the piston rod during movement can be effectively reduced, thereby improving the stability and reliability of the device. The support spring can play a shock-absorbing role for the piston rod, while the side spring improves the lateral shock-absorbing ability of the piston rod.

[0019] Through the optimized force transmission and rotation mechanism, the energy loss is reduced, and the energy utilization efficiency of the electric cylinder is improved. The connection method between the central screw and the drive motor and the design of the synchronous transmission system make the movement of the electric cylinder more efficient.

[0020] Due to the application of the support spring and side spring, as well as the structural design of the central screw and the connecting plate, the device has high stability. The setting of the buffer pad can also prevent the central screw from hitting the base, further enhancing the stability of the system.

[0021] The design of the device is simple and compact, and each component forms a solid whole through a reasonable connection method. The spline connection restricts the rotation of the connecting plate, ensuring the controllability and movement stability of the device. Brief Description of the Drawings

[0022] Figure 1 It is a schematic structural diagram of an electric cylinder with a shock-absorbing function;

[0023] Figure 2 It is a schematic structural diagram of the movable sleeve;

[0024] Figure 3 It is a schematic structural diagram of the synchronous gear;

[0025] Figure 4 It is a schematic structural diagram of the side spring;

[0026] In the figure: 1, cylinder block; 2, movable sleeve; 21, connecting plate; 22, side screw; 23, support ring; 24, support spring; 25, frustum; 26, side spring; 27, synchronous gear; 28, transmission gear; 29, gear ring; 3, piston rod; 4, central screw; 5, base; 6, drive motor; 71, synchronous pulley; 72, synchronous belt; 73, buffer pad. Detailed Embodiment

[0027] Please refer to Figure 1 and Figure 2 In the embodiment of the present invention, an electric cylinder with a shock-absorbing function includes a cylinder block 1. The cylinder block 1 is a closed cylinder. An movable sleeve 2 is arranged in the cylinder block 1. The upper end of the movable sleeve 2 is telescopically connected with a piston rod 3. A central screw 4 is rotatably arranged at the axis in the cylinder block 1. The central screw 4 penetrates through the movable sleeve 2 and is accommodated in the piston rod 3;

[0028] Inside the movable sleeve 2, connecting disks 21 are respectively provided at the upper and lower parts. A plurality of rotatable side screws 22 are circumferentially distributed between the two connecting disks 21. Each side screw 22 is in threaded engagement with the central screw 4. The piston rod 3 is fixed to the upper connecting disk 21;

[0029] Support rings 23 are fixed to the upper and lower ends of the movable sleeve 2. Support springs 24 are respectively provided between the connecting disk 21 and the support ring 23 at the same end.

[0030] That is to say, when the central screw 4 rotates, it can make the side screw 22 rotate, and the side screw 22 drives the connecting disk 21 and the piston rod 3 to move up and down, thereby realizing the telescopic function of the piston rod 3, realizing an effective force transmission and rotation mechanism, reducing energy loss, and improving the energy utilization efficiency of the electric cylinder;

[0031] Moreover, the connecting disk 21, the piston rod 3 are softly connected to the movable sleeve 2 and the support ring 23 through the support spring 24, so that the support spring 24 can play a shock-absorbing role on the piston rod 3, effectively reducing the vibration and impact of the piston rod 3, and improving the stability and safety of the equipment.

[0032] In this embodiment, a base 5 is fixed to the bottom of the cylinder block 1. The central screw 4 penetrates into the base 5. A driving motor 6 is connected to one side of the base 5. Synchronous pulleys 71 are respectively connected to the driving motor 6 and the central screw 4. The two synchronous pulleys 71 are connected by a synchronous belt 72. The central screw 4 is slidably and rotationally restrictedly connected to the synchronous pulley 71 through a sliding spline.

[0033] That is to say, the central screw 4 can be lifted to a certain extent in the cylinder block 1, so that the support spring 24 can play a shock-absorbing role on the piston rod 3.

[0034] In this embodiment, a buffer pad 73 is provided below the synchronous pulley 71 at the bottom of the central screw 4, which can prevent the central screw 4 from hitting the base 5.

[0035] In this embodiment, the inner wall of the cylinder block 1 has an internal thread, the outer wall of the movable sleeve 2 has an external thread, and the movable sleeve 2 is threadedly connected into the cylinder block 1.

[0036] Please refer to Figure 3 , in this embodiment, synchronous gears 27 are fixed to the upper and lower ends of the side screw 22, and transmission gears 28 meshing with each synchronous gear 27 are respectively provided in the connecting disk 21;

[0037] The inner wall of the movable sleeve 2 is a toothed ring 29 meshing with the transmission gear 28.

[0038] That is to say, when the side screw rod 22 rotates, the transmission of the synchronous gear 27 and the transmission gear 28 can drive the movable sleeve 2 to rotate synchronously. And because the movable sleeve 2 is threadedly connected to the cylinder block 1, the movable sleeve 2 can move up and down with the connecting disc 21 and the piston rod 3. When the piston rod 3 is subjected to vibration shock, due to the threaded connection between the movable sleeve 2 and the cylinder block 1, the movable sleeve 2 remains stationary, enabling the support spring 24 to play a shock-absorbing role for the piston rod 3.

[0039] Please refer to Figure 4 , in this embodiment, a plurality of side springs 26 are fixedly arranged circumferentially in the inner wall of the movable sleeve 2 between the connecting disc 21 and the support spring 24 at the same end. A frustum 25 is fixed on the side of the connecting disc 21 away from the side screw rod 22, and the side springs 26 are attached to the frustum 25.

[0040] The side springs 26 can play an elastic supporting role in the radial direction of the connecting disc 21, thereby improving the side shock-absorbing ability of the piston rod 3. And because the frustum 25 narrows on the side of the side screw rod 22, when the connecting disc 21 moves towards the direction close to the support spring 24, the elastic force of the side spring 26 on the frustum 25 increases, so that when the axial force on the piston rod 3 increases, the corresponding side supporting force also increases.

[0041] In this embodiment, the piston rod 3 is slidably and rotationally restrictedly connected to the cylinder block 1 through a spline. Thereby restricting the rotation of the connecting disc 21 and enabling it to only slide up and down.

[0042] The working principle of the present invention:

[0043] The central screw rod is connected to the driving motor through the base, and the driving motor can control the rotation of the central screw rod. When the central screw rod rotates, the rotation of the side screw rod causes the connecting disc and the piston rod to move up and down together, realizing the telescopic function of the piston rod;

[0044] Support rings are fixed at the upper and lower ends of the movable sleeve. A support spring is arranged between the support ring and the connecting disc. When the piston rod is subjected to vibration shock, due to the threaded connection between the movable sleeve and the cylinder block, the movable sleeve remains stationary, enabling the support spring to play a shock-absorbing role for the piston rod;

[0045] A plurality of side springs are fixed on the inner wall of the movable sleeve. These side springs play a lateral elastic supporting role when the piston rod moves. And the design of the frustum and the side springs enables the corresponding side supporting force to increase when the axial force on the piston rod increases, thereby improving the lateral shock-absorbing ability of the piston rod;

[0046] The piston rod is connected to the cylinder block through a spline, restricting the rotation of the connecting disc and enabling it to only slide up and down, ensuring the stability of the movable sleeve and the controllability of the movement.

[0047] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes, shall be covered by the protection scope of the present invention.

Claims

1. An electric cylinder with a shock absorbing function, comprising a cylinder body (1), characterized in that: The cylinder body (1) is a closed cylinder, a movable sleeve (2) is provided in the cylinder body (1), the upper end of the movable sleeve (2) is telescopically connected to a piston rod (3), a central screw (4) is rotatably provided on the axis of the cylinder body (1), and the central screw (4) passes through the movable sleeve (2) and is accommodated in the piston rod (3); The movable sleeve (2) is provided with connecting plates (21) at the top and bottom, respectively. A plurality of rotatable side screws (22) are distributed circumferentially between the two connecting plates (21). Each of the side screws (22) is threadedly engaged with the center screw (4). The piston rod (3) is fixed to the upper connecting plate (21). Support rings (23) are fixed at the upper and lower ends of the movable sleeve (2), and support springs (24) are respectively provided between the connecting plate (21) and the support ring (23) at the same end; The inner wall of the cylinder body (1) has an internal thread, the outer wall of the movable sleeve (2) has an external thread, and the movable sleeve (2) is threadedly connected to the inside of the cylinder body (1).

2. The electric cylinder with shock absorption function according to claim 1, characterized in that: A base (5) is fixed at the bottom of the cylinder body (1), the central screw (4) penetrates into the base (5), a driving motor (6) is connected to one side of the base (5), the driving motor (6) and the central screw (4) are each connected to a synchronous wheel (71), the two synchronous wheels (71) are connected via a synchronous belt (72), and the central screw (4) and the synchronous wheel (71) are connected via a sliding spline so as to be slidable and rotation-restricted.

3. The electric cylinder with shock absorption function according to claim 2, characterized in that: A buffer pad (73) is provided below the synchronous wheel (71) at the bottom of the central screw (4).

4. The electric cylinder with shock absorption function according to claim 1, characterized in that: Synchronous gears (27) are fixed to the upper and lower ends of the side screw rod (22), and a transmission gear (28) meshing with each synchronous gear (27) is respectively provided in the connecting plate (21).

5. The electric cylinder with shock absorption function according to claim 4, characterized in that: The inner wall of the movable sleeve (2) is a gear ring (29) meshing with the transmission gear (28).

6. The electric cylinder with shock absorption function according to claim 1, characterized in that: A plurality of side springs (26) are fixed in a circumferential distribution in the inner wall of the movable sleeve (2) between the connecting disk (21) and the supporting spring (24) at the same end, a round table (25) is fixed on a side of the connecting disk (21) away from the side screw rod (22), and the side springs (26) are fitted into the round table (25).

7. The electric cylinder with shock absorption function according to claim 1, characterized in that: The piston rod (3) and the cylinder body (1) are connected via a spline in a slidable and rotationally restricted manner.

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