An electric cylinder with multi-function of reverse and stop function

Abstract

The present invention relates to the technical field of electric cylinders, and in particular discloses an electric cylinder with a check function, comprising a power source, a telescopic cylinder assembly, and a bearing seat, and further comprising a check component. The power source, the telescopic cylinder assembly, and the check component are all disposed on the bearing seat, and the bearing seat has a common transmission member. The power source drives the telescopic rod of the telescopic cylinder assembly to extend or retract via the common transmission member. The check component acts on the common transmission member to provide an opposite torque to the load member applied to the telescopic rod of the telescopic cylinder assembly. The check component comprises a check member and a torque adjustment mechanism acting on the common transmission member. The torque adjustment mechanism adjusts the magnitude of the torque applied by the check member to the common transmission member. The electric cylinder with a check function can provide a reverse torque to the load member through the check component to prevent accidental movement in the event of a power source failure, and the torque is adjustable. Power transmission is also achieved via the common transmission member, thereby improving stability and adaptability.

Description

Technical Field

[0001] The invention relates to the technical field of electric cylinders, and in particular discloses an electric cylinder with a multi-function of backflow and check. Background Art

[0002] Electric cylinders are widely used in industrial production and the operation of various types of mechanical equipment. However, traditional electric cylinders present numerous challenges that require urgent resolution. For one thing, when used to support loads subject to gravity or external forces, such as when lifting heavy objects vertically, they lack effective backstops. This can easily cause the load to slide due to gravity or sudden equipment failure, posing a serious threat to equipment safety and the lives of operators. Furthermore, they are difficult to adapt to complex and diverse work scenarios. Furthermore, traditional electric cylinders have limited functionality, with independent components and a lack of efficient integration. This results in large installation space requirements, complex connection structures, increased installation and maintenance costs, and poor versatility.

[0003] Furthermore, existing electric cylinders lack flexibility in torque adjustment, preventing precise adjustment based on actual loads. Either excessive torque damages the equipment, or too little torque fails to meet operational requirements. Furthermore, the check function is difficult to easily disable during equipment commissioning and maintenance, hindering work efficiency. Given these challenges, developing an electric cylinder with a check function is of great practical significance. Summary of the Invention

[0004] In order to overcome the shortcomings and deficiencies in the prior art, an object of the present invention is to provide an electric cylinder with a multifunctional check and return function.

[0005] To achieve the above-mentioned objectives, the present invention provides an electric cylinder with a check and return multifunction, comprising a power source, a telescopic cylinder assembly and a bearing seat, and also a check assembly, wherein the power source, the telescopic cylinder assembly and the check assembly are all arranged on the bearing seat, and the bearing seat has a common transmission member, and the power source drives the telescopic rod of the telescopic cylinder assembly to extend or retract via the common transmission member, and the check assembly acts on the common transmission member to provide an opposite torque to the load member applied to the telescopic rod of the telescopic cylinder assembly; the check assembly has a check member and a torque adjustment mechanism acting on the common transmission member, and the torque adjustment mechanism regulates the torque applied to the common transmission member by the check member; the common transmission member is a first gear rotatably arranged on the bearing seat, and the bearing seat is rotatably provided with a second gear meshing with the first gear, the first gear and the second gear are combined to form a gear set, the check member is a check shaft fixedly connected to the second gear, and the output shaft of the power source is matched with the first gear; the torque adjustment mechanism acts on the check shaft.

[0006] Furthermore, the electric cylinder with a check valve multi-function also includes a clutch mechanism, which has a threaded sleeve, a limit piece and an elastic element, and the threaded sleeve is threadedly connected to the bearing seat; the limit piece is arranged on the check valve member, and the threaded sleeve is used to cooperate with the limit piece; the check valve member is movably arranged on the bearing seat, and the elastic force of the elastic element drives the limit piece to move relative to the bearing seat to drive the check valve member to move; the threaded sleeve rotates to drive the check valve member to drive the limit piece to move, so that the elastic element is compressed or released, thereby realizing the connection or disconnection between the check valve member and the common transmission member.

[0007] Furthermore, the bearing seat is slidingly provided with a sleeve, the sleeve is provided with a boss for abutting against the bearing seat, and the sleeve is sleeved on the outside of the check member; the two ends of the elastic element act on the bearing seat and the sleeve respectively; the bearing seat is provided with a threaded hole, the limit piece is located in the threaded hole, one end of the threaded sleeve has a threaded column screwed into the threaded hole, the free end of the threaded column is used to abut against the limit piece, and the threaded sleeve has a disc protrusion located outside the bearing seat for easy gripping.

[0008] Furthermore, the torque adjustment mechanism includes a friction component and a friction driving component that drives the friction component to move; the friction driving component drives the friction component to move, and then the friction force between the check member and the bearing seat changes, thereby adjusting the magnitude of the check torque applied by the check member to the common transmission member.

[0009] Furthermore, the friction assembly includes a first friction member fixedly connected to the bearing seat and a second friction member axially movably sleeved on the outside of the check member; the friction drive assembly has an adjusting nut threaded on the check member, and the second friction member is driven to contact and press the first friction member by rotating the adjusting nut, and the check torque is the friction torque generated by the pressing force between the first friction member and the second friction member.

[0010] Furthermore, the bearing seat has a first bearing seat for installing the output shaft of the power source and a second bearing seat for installing the check shaft, and the second bearing seat is installed on the first bearing seat; the output shaft and the check shaft of the power source are both installed on the bearing seat through a bearing assembly, and the bearing assembly includes two support bearings arranged opposite to each other in the axial direction, and the outer rings of the support bearings are clearance-fitted with the bearing seat; the two support bearings are used to support the output shaft or the check member.

[0011] Furthermore, the check member is provided with an internal thread, and the adjusting nut is threadedly connected to the internal thread; the outer diameter of the first friction member is larger than the maximum outer diameter of the adjusting nut; the second friction member is a frustum-shaped structure, and its outer diameter gradually increases from the end close to the adjusting nut to the side of the first friction member, and a conical surface matching structure is formed between the second friction member and the first friction member, and the second friction member is driven to move by the adjusting nut, thereby adjusting the contact pressure between the first friction member and the second friction member.

[0012] Furthermore, the first bearing seat is equipped with a rotating driven shaft via a bearing assembly, one axial end of the driven shaft is connected to the output shaft of the power source, and the other end is connected to the piston rod of the telescopic cylinder assembly via a synchronous wheel assembly.

[0013] Furthermore, the end of the check member away from the common transmission member is connected to a detachable handle, the check member is rotatably set on the bearing seat, one end of the handle is connected to the check member, and the other end is connected to the operating end; the user drives the check member to rotate by holding the operating end to realize the manual lifting and lowering operation of the telescopic cylinder assembly.

[0014] Beneficial effects of the present invention:

[0015] (1) Safety and functional integration: The check assembly can prevent the load from sliding down due to external forces, ensuring the safety of equipment and personnel. For example, it can effectively prevent falls when lifting heavy objects vertically. The power source, telescopic cylinder assembly, and check assembly are integrated into the bearing base. Through the shared transmission parts, they work together to give the electric cylinder multiple functions, reduce installation space and complex connections, and are suitable for various work scenarios.

[0016] (2) Flexible torque adjustment: The torque adjustment mechanism flexibly adjusts the backstop torque through the clutch mechanism. It can be accurately set according to the actual load situation, ensuring the backstop effect while avoiding damage to the equipment due to improper torque. The clutch mechanism is easy to operate and can easily release the backstop function, which is convenient for equipment commissioning, maintenance and operation in specific working stages. Structural design optimization: It adopts gear transmission, which has high efficiency, accurate transmission ratio, and reliable operation. The backstop shaft structure is simple and reliable. The bearing seat on the bearing seat is compactly arranged, and the bearing assembly effectively supports the shaft and evenly bears the load, ensuring smooth operation. In addition, the handle is ergonomic, easy to operate, and can accurately control the backstop action, improving equipment safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of an electric cylinder with a check and return function according to the present invention;

[0018] Figure 2 It is a second overall structural schematic diagram of the present invention;

[0019] Figure 3 It is a structural schematic diagram of the clutch mechanism and the torque adjustment mechanism of the present invention;

[0020] Figure 4 This is a schematic structural diagram of the clutch mechanism and torque adjustment mechanism after the backstop shaft is removed in the present invention;

[0021] Figure 5 It is a partial exploded schematic diagram of the clutch mechanism and the torque adjustment mechanism of the present invention;

[0022] Figure 6 It is a structural schematic diagram of the backstop shaft of the present invention;

[0023] Figure 7 It is a partial structural diagram of the clutch mechanism and the torque adjustment mechanism of the present invention;

[0024] Figure 8 The figure is an exploded schematic diagram of the torque adjustment mechanism of the present invention. The reference numerals include: 1, power source; 2, telescopic cylinder assembly; 3, bearing seat; 31, first bearing seat; 32, second bearing seat; 33, bearing assembly; 34, support bearing; 35, driven shaft; 36, synchronous wheel assembly; 4, check assembly; 41, check member; 410, check shaft; 42, clutch mechanism; 421, threaded sleeve; 422, limiter; 423, elastic element; 424, bearing end cover; 425, motion gap; 426, shaft ring; 427, shaft sleeve; 428, first Driver; 429, first transmission mechanism; 43, torque adjustment mechanism; 431, friction assembly; 432, friction drive assembly; 433, first friction member; 434, second friction member; 435, adjusting nut; 436, internal thread; 437, second driver; 438, second transmission mechanism; 439, spring assembly; 4390, disc spring; 5, gear assembly; 51, common transmission member; 510, first gear; 52, second gear; 520, bevel gear; 6, handle; 61, operating end. DETAILED DESCRIPTION

[0025] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0026] See also Figures 1 to 8As shown, an electric cylinder with a check function of the present invention includes a power source 1, a telescopic cylinder assembly 2, and a bearing seat 3, and also includes a check assembly 4. The power source 1, the telescopic cylinder assembly 2, and the check assembly 4 are all arranged on the bearing seat 3. The bearing seat 3 has a common transmission member 51. The power source 1 drives the telescopic rod of the telescopic cylinder assembly 2 to extend or retract via the common transmission member 51. The check assembly 4 acts on the common transmission member 51 to provide an opposite torque to the load member applied to the telescopic rod of the telescopic cylinder assembly 2; the check assembly 4 includes a check member 41 and a torque adjustment mechanism 43 acting on the common transmission member 51. The torque adjustment mechanism 43 adjusts the torque applied by the check member 41 to the common transmission member 51. The common transmission member 51 is a first gear 510 rotatably provided on the supporting seat 3, and the supporting seat 3 is rotatably provided with a second gear 52 meshing with the first gear 510. The first gear 510 and the second gear 52 are combined to form a gear set 5. The check member 41 is a check shaft 410 fixedly connected to the second gear 52, and the output shaft of the power source 1 is cooperated with the first gear 510; the torque adjustment mechanism 43 acts on the check shaft 410.

[0027] In actual use, the check assembly 4 acts on the common transmission member 51, providing an opposite torque to the load member applied to the telescopic rod of the telescopic cylinder assembly 2. This means that when the electric cylinder stops working or the power source 1 fails, the check assembly 4 can prevent the load from accidentally moving or sliding due to its own weight or other external forces, thereby improving the safety and stability of the equipment operation. The check assembly 4 not only prevents the load from accidentally moving, but also regulates the torque applied by the check member 41 to the common transmission member 51 through the torque adjustment mechanism 43. This design allows the electric cylinder to flexibly adjust the check torque according to different working requirements and load conditions, achieving precise control of the load and diversified working modes, thereby enhancing the adaptability and versatility of the electric cylinder.

[0028] The power source 1, telescopic cylinder assembly 2, and check assembly 4 are all mounted on a support base 3, which shares a common transmission element 51. This structural design allows for a compact layout of the various components of the electric cylinder, reducing space requirements. The shared transmission element 51 also enables efficient power transmission, simplifies the transmission structure, and improves system integration and reliability. The synergistic effect of the check assembly 4 and torque adjustment mechanism 43 allows the electric cylinder to quickly and accurately respond to load changes in various operating scenarios, avoiding equipment downtime or failure due to unexpected load movement, thereby improving operational and production efficiency.

[0029] In actual use, a gear set 5 (with the first gear 510 and the second gear 52 meshing) is used as the common transmission element 51. Gear transmission has the advantages of accurate transmission ratio, high transmission efficiency, reliable operation, and long service life. It can ensure that the power of the power source 1 is stably and accurately transmitted to the telescopic rod of the telescopic cylinder assembly 2, making the extension or retraction of the telescopic rod smoother and more accurate, and improving the operating precision and stability of the electric cylinder. The check member 41 uses a check shaft 410 fixedly connected to the second gear 52, with a simple structural design. When a check is required, the torque adjustment mechanism 43 acts on the check shaft 410, thereby generating a reverse torque on the second gear 52 fixed to the check shaft 410. Since the second gear 52 meshes with the first gear 510, the check function of the entire transmission system is realized, effectively preventing accidental movement of the load. This structure is easy to manufacture, install, and maintain.

[0030] The torque adjustment mechanism 43 acts on the check shaft 410, enabling direct and precise adjustment of the check torque. Because the check shaft 410 is directly connected to the second gear 52, the force applied by the torque adjustment mechanism 43 to the check shaft 410 can be quickly and accurately transmitted to the gear set 5, thereby achieving precise control of the check torque to meet the requirements of different loads and operating conditions.

[0031] Specifically, the electric cylinder with a check valve multi-function also includes a clutch mechanism 42, which has a threaded sleeve 421, a limit piece 422 and an elastic element 423. The threaded sleeve 421 is screwed to the bearing seat 3; the limit piece 422 is arranged on the check member 41, and the threaded sleeve 421 is used to cooperate with the limit piece 422; the check member 41 is movably arranged on the bearing seat 3, and the elastic force of the elastic element 423 drives the limit piece 422 to move relative to the bearing seat 3 to drive the check member 41 to move; the threaded sleeve 421 rotates to drive the check member 41 to drive the limit piece 422 to move, so that the elastic element 423 is compressed or released, thereby realizing the connection or disconnection between the check member 41 and the common transmission member 51.

[0032] In actual use, the configuration of the clutch mechanism 42 enables the check member 41 to be connected or disconnected from the common transmission member 51. When the check function is required, the threaded sleeve 421 is rotated to connect the check member 41 to the common transmission member 51, and the check member 41 can be used to provide reverse torque to the load to prevent accidental movement. When the check function is not required (for example, when the electric cylinder is normally telescopically adjusted and there is no need for a check function), the threaded sleeve 421 can be rotated to disengage the check member 41 from the common transmission member 51, preventing the check member 41 from unnecessarily obstructing normal transmission. This increases the flexibility of the electric cylinder and adapts it to a wider range of working scenarios.

[0033] The rotation of the threaded sleeve 421 can not only connect or disconnect the check member 41 with the common transmission member 51, but also adjust the check torque by compressing or releasing the elastic element 423. When connecting the check member 41, by controlling the degree of rotation of the threaded sleeve 421, the compression of the elastic element 423 can be accurately controlled, and the torque applied by the check member 41 to the common transmission member 51 can be accurately adjusted. The clutch control and torque adjustment functions are organically combined, the operation process is simplified, and the control accuracy is improved. The elastic element 423 in the clutch mechanism 42 is not only used to provide the elastic force that moves the check member 41, but also plays a certain buffering role during the check process. When the load shows an unexpected movement tendency, the elastic element 423 can absorb part of the impact force, avoid rigid collision between the check member 41 and the common transmission member 51, protect the check assembly 4 and the components of the transmission system, and extend the service life of the equipment.

[0034] By flexibly controlling the connection and disconnection of the check member 41 from the common transmission element 51 and adjusting the check torque, the electric cylinder can better adapt to varying loads under different operating conditions. Whether light or heavy loads, or external forces of varying directions and magnitudes, the check performance can be optimized by adjusting the clutch mechanism 42, ensuring stable operation and efficiency of the electric cylinder.

[0035] Specifically, the bearing seat 3 is slidingly provided with a sleeve 427, and the sleeve 427 is provided with a boss for abutting against the bearing seat 3, and the sleeve 427 is sleeved on the outside of the check member 41; the two ends of the elastic element 423 act on the bearing seat 3 and the sleeve 427 respectively; the bearing seat 3 is provided with a threaded hole, and the limit piece 422 is located in the threaded hole, and one end of the threaded sleeve 421 has a threaded column screwed into the threaded hole, and the free end of the threaded column is used to abut against the limit piece 422, and the threaded sleeve 421 has a disc protrusion located outside the bearing seat 3 for easy gripping.

[0036] In actual use, the bearing seat 3 is provided with a threaded hole, and the threaded sleeve 421 is screwed into the threaded hole via a threaded column. This threaded connection method is relatively convenient for installation and removal. The threaded sleeve 421 also has a disc protrusion located outside the bearing seat 3 for easy gripping. The operator can easily rotate the threaded sleeve 421 by hand to adjust the connection or disconnection between the check member 41 and the common transmission member 51, as well as the compression degree of the elastic element 423. The entire operation process is simple and intuitive, reducing operational difficulty and improving work efficiency. The sleeve 427 is slidably disposed on the bearing seat 3 and sleeved on the outside of the check member 41. The two ends of the elastic element 423 act on the bearing seat 3 and the sleeve 427 respectively. This arrangement provides a stable installation and working structure for the elastic element 423. The shoulder of the sleeve 427 can effectively limit the position of the elastic element 423, keeping it stable during compression and release, ensuring that the elastic element 423 can accurately transmit the elastic force to the check member 41, thereby precisely controlling the movement of the check member 41 and adjusting the check torque.

[0037] The limiter 422 is located in the threaded hole, and the free end of the threaded column of the threaded sleeve 421 is used to abut the limiter 422. This structural design makes the control of the check member 41 by the threaded sleeve 421 more reliable. Through the cooperation between the threaded sleeve 421 and the limiter 422, the movement distance of the check member 41 can be accurately controlled, and the connection or disconnection between the check member 41 and the common transmission member 51 can be accurately achieved, thereby ensuring the stability and reliability of the check function. The shaft sleeve 427 is sleeved on the outside of the check member 41, providing additional support and guidance for the check member 41, making the check member 41 more stable during movement and reducing the possibility of shaking and deviation. This helps to improve the accuracy and reliability of the check function, ensuring that the check member 41 can accurately interact with the common transmission member 51 during the check process, and effectively preventing accidental movement of the load.

[0038] Specifically, the torque adjustment mechanism 43 includes a friction component 431 and a friction driving component 432 that drives the friction component 431 to move; the friction driving component 432 drives the friction component 431 to move, and then the friction force between the check member 41 and the supporting seat 3 changes, thereby adjusting the magnitude of the check torque applied by the check member 41 to the common transmission member 51.

[0039] In actual use, the friction drive component 432 drives the friction component 431 to move, which can accurately change the friction force between the check member 41 and the bearing seat 3. The change in friction force directly affects the check torque applied by the check member 41 to the common transmission member 51, so that the check torque can be continuously and flexibly adjusted according to actual work requirements. Whether facing small load fluctuations or large external force impacts, the stable operation of the electric cylinder can be ensured by adjusting the check torque, thereby improving the adaptability of the electric cylinder to different working conditions. Compared with some complex torque adjustment mechanisms 43, the method of using friction to adjust the check torque is more direct and efficient. The friction drive component 432 can quickly respond to operating instructions, drive the friction component 431 to change the friction force, and thus quickly adjust the check torque, reducing adjustment time and improving the working efficiency of the electric cylinder. At the same time, this adjustment method does not require a complex mechanical structure or control system, reducing manufacturing costs and maintenance difficulties.

[0040] The interaction between the friction assembly 431, the check member 41 and the bearing seat 3 can provide stable friction under different working conditions. Even under long-term use or external interference, the stability and reliability of the check torque can be guaranteed by rationally designing the material and structure of the friction assembly 431. This helps prevent the load from accidentally sliding or moving when the electric cylinder stops working, thereby improving the safety and reliability of the equipment. Since the magnitude of the friction force can be flexibly adjusted by the friction drive assembly 432, the check torque applied by the check member 41 to the common transmission member 51 also has a wide adjustment range. The check torque can be adjusted to an appropriate value according to different load weights, working environments and operating requirements to meet the needs of various complex working conditions and expand the application range of the electric cylinder.

[0041] Specifically, the friction assembly 431 includes a first friction member 433 fixedly connected to the bearing seat 3 and a second friction member 434 axially movable and sleeved on the outside of the check member 41; the friction drive assembly 432 has an adjusting nut 435 threaded on the check member 41, and the second friction member 434 is driven to contact and press the first friction member 433 by rotating the adjusting nut 435. The check torque is the friction torque generated by the pressing force between the first friction member 433 and the second friction member 434.

[0042] In actual use, the friction assembly 431 consists of a first friction member 433 fixed to the bearing seat 3 and a second friction member 434 axially movable and sleeved on the outside of the check member 41. The friction drive assembly 432 includes only an adjustment nut 435 threaded onto the check member 41. This structural design is simple and straightforward, with a small number of parts and a relatively simple manufacturing process, making it easy to produce and assemble, thereby reducing manufacturing costs. By rotating the adjustment nut 435, the second friction member 434 can be precisely controlled to move toward the first friction member 433 and apply a clamping force. Because the check torque is a friction torque generated by the clamping force between the first and second friction members 433, 434, the clamping force can be precisely adjusted by adjusting the rotation angle or number of turns of the nut 435, thereby achieving precise control of the check torque. This enables the electric cylinder to provide appropriate check protection according to different load conditions and operating requirements.

[0043] When the adjusting nut 435 drives the second friction member 434 to contact and tighten with the first friction member 433, the friction force between the two can stably provide a check torque. During operation, as long as the adjusting nut 435 does not loosen, the check torque can remain relatively stable, effectively preventing the load from accidentally moving due to external forces, and ensuring the working stability and safety of the electric cylinder. This torque adjustment method has good adaptability to different working environments and working conditions. Whether it is a high-temperature or low-temperature environment, or a workplace with high vibration, as long as the appropriate friction member material is selected, the adjusting nut 435 and the friction assembly 431 can work normally, ensuring the adjustability and stability of the check torque, so that the electric cylinder can operate reliably under various complex conditions.

[0044] Specifically, the bearing seat 3 has a first bearing seat 31 for installing the output shaft of the power source 1 and a second bearing seat 32 for installing the check shaft 410, and the second bearing seat 32 is installed on the first bearing seat 31; the output shaft and the check shaft 410 of the power source 1 are both installed on the bearing seat through a bearing assembly 33, and the bearing assembly 33 includes two support bearings 34 arranged opposite to each other in the axial direction, and the outer ring of the support bearing 34 is clearance-fitted with the bearing seat; the two support bearings 34 are used to support the output shaft or the check member 41.

[0045] In actual use, the second bearing seat 32 is installed on the first bearing seat 31. This layered bearing seat installation method makes the installation structure of the output shaft of the power source 1 and the check shaft 410 more stable. A reasonable layout can effectively disperse the forces generated by each component during operation, reduce structural deformation or damage caused by uneven force, enhance the stability and reliability of the overall structure of the electric cylinder, and ensure that it can maintain a good working condition during long-term operation. The bearing assembly 33 adopts two support bearings 34 arranged opposite to each other in the axial direction, and the inner ring of the support bearing 34 has an interference fit with the shaft, and the outer ring has a clearance fit with the bearing seat. This matching method can provide precise support for the output shaft or the check shaft 410, reduce the radial and axial runout of the shaft during rotation, and improve the rotation accuracy of the shaft system. The high-precision shaft system operation can ensure that the power of the power source 1 is accurately transmitted to the telescopic cylinder assembly 2, and the check assembly 4 can accurately play a check role, thereby improving the working accuracy and performance of the electric cylinder.

[0046] The two support bearings 34 evenly carry the radial and axial loads generated by the rotation of the output shaft or backstop member 41. This effectively prevents premature wear or damage to a single bearing due to excessive load, extending the bearing's service life and thereby improving the overall reliability and durability of the electric cylinder. Furthermore, even load distribution helps reduce vibration and noise during operation, improving the working environment.

[0047] Specifically, the check member 41 is provided with an internal thread 436, and the adjusting nut 435 is threadedly connected to the internal thread 436; the outer diameter of the first friction member 433 is larger than the maximum outer diameter of the adjusting nut 435; the second friction member 434 is a frustum-shaped structure, and its outer diameter gradually increases from the end close to the adjusting nut 435 to the side of the first friction member 433, and a conical surface matching structure is formed between the second friction member 434 and the first friction member 433, and the second friction member 434 is driven to move by the adjusting nut 435, thereby adjusting the contact pressure between the first friction member 433 and the second friction member 434.

[0048] In actual use, the check member 41 is provided with an internal thread 436 that is threadedly engaged with an adjustment nut 435. Rotating the adjustment nut 435 precisely drives the second friction member 434 to move axially along the check member 41. Because the second friction member 434 is frustoconical in shape and forms a conical surface with the first friction member 433, the contact area and contact pressure between the second friction member 434 and the first friction member 433 change with displacement, effectively adjusting the friction torque between them, i.e., the check torque. This adjustment method enables continuous and precise adjustment of the check torque to accommodate varying loads and operating conditions. The conical surface fit ensures a tighter and more stable contact between the first and second friction members 433, 434. During operation, even under external influences such as vibration and impact, the interaction between the conical surfaces ensures a relatively stable friction torque, preventing loosening or slipping. This improves the reliability and stability of the check function and effectively prevents unintended load movement.

[0049] The outer diameter of the first friction member 433 is larger than the maximum outer diameter of the adjusting nut 435. This design effectively prevents interference between the adjusting nut 435 and the first friction member 433 during rotation and driving the second friction member 434. This ensures that the adjusting nut 435 can rotate smoothly and accurately drive the second friction member 434, ensuring the normal operation of the torque adjustment mechanism 43 and avoiding failures and damage caused by component interference. The conical surface mating structure can achieve a more uniform distribution of contact stress when transmitting friction force, reducing local wear. At the same time, the appropriate selection of materials for the first and second friction members 433, 434 can further improve their wear resistance. This extends the service life of the torque adjustment mechanism 43, reduces the need for frequent replacement of friction members due to wear, reduces maintenance costs and downtime, and improves the overall reliability and cost-effectiveness of the electric cylinder.

[0050] Specifically, the first bearing seat 31 is equipped with a rotating driven shaft 35 through a bearing assembly 33 , one axial end of the driven shaft 35 is connected to the output shaft of the power source 1 , and the other end is connected to the piston rod of the telescopic cylinder assembly 2 through a synchronous wheel assembly 36 .

[0051] In actual use, the driven shaft 35 is mounted on the first bearing seat 31 via the bearing assembly 33, ensuring stable rotation. One end of the driven shaft 35 is connected to the output shaft of the power source 1, and the other end is connected to the piston rod of the telescopic cylinder assembly 2 via the synchronous wheel assembly 36. This connection ensures smooth transmission of power from the power source 1 to the piston rod, ensuring stable and accurate telescopic movement of the piston rod. The bearing assembly 33 effectively supports the driven shaft 35, reducing radial and axial runout during rotation, ensuring that significant deviations and fluctuations in power transmission occur, and improving the operating precision and reliability of the electric cylinder.

[0052] The arrangement of the driven shaft 35 allows for a certain distance between the power source 1 and the telescopic cylinder assembly 2. Connected via the synchronous wheel assembly 36, this allows for flexible arrangement of the various components of the electric cylinder without compromising power transmission. This design can meet the spatial layout requirements of some special work scenarios. For example, when space is limited or a specific installation location is required, the relative position of the power source 1 and the telescopic cylinder assembly 2 can be easily adjusted, expanding the application range of the electric cylinder. The synchronous wheel assembly 36 features high transmission efficiency, effectively transmitting the rotation of the driven shaft 35 to the piston rod of the telescopic cylinder assembly 2, reducing energy loss during power transmission. Compared to other transmission methods, synchronous wheel transmission can better ensure the accuracy of the transmission ratio, allowing the piston rod to telescope at the desired speed and stroke, thereby improving the efficiency and performance of the electric cylinder.

[0053] Specifically, the end of the check member 41 away from the common transmission member 51 is connected to a detachable handle 6, and the check member 41 is rotatably set on the bearing seat 3. One end of the handle 6 is connected to the check member 41, and the other end is connected to the operating end 61; the user holds the operating end 61 to drive the check member 41 to rotate to realize the manual lifting operation of the telescopic cylinder assembly 2.

[0054] During actual use, an L-shaped handle 6 is provided, with one end fixedly connected to the end of the check member 41, and the other end being an operating end 61. The operator can easily drive the check member 41 to rotate by holding the operating end 61. Compared with directly operating the check member 41, the handle 6 provides a more comfortable and labor-saving operation method, especially when frequent check action control is required, which greatly improves the convenience of operation and reduces the labor intensity of the operator. By driving the check member 41 to rotate by the handle 6, the control of the check action can be achieved more accurately in conjunction with the clutch mechanism 42 and the torque adjustment mechanism 43. The operator can accurately adjust the rotation angle and direction of the check member 41 according to actual work requirements, thereby achieving connection or disconnection between the check member 41 and the common transmission member 51, as well as adjusting the size of the check torque. This precise control helps to improve the adaptability and reliability of the electric cylinder in different working scenarios.

[0055] In an emergency, the operator can quickly operate the check system using handle 6, quickly implementing the check function and preventing the load from moving dangerously due to unexpected circumstances. The convenient operation of handle 6 allows the operator to react in the shortest possible time, improving the safety and reliability of the electric cylinder in emergency situations.

[0056] In this embodiment, the check member 41 is provided with a shaft ring 426, and the axial ends of the shaft sleeve 427 are respectively used to conflict with the shaft ring 426 and the limit member 422; a movement gap is provided between the boss of the shaft sleeve 427 and the second bearing seat 32, and the movement gap is set to match the elastic deformation amount of the elastic element 423.

[0057] A clearance is provided between the shoulder of the sleeve 427 and the second bearing seat 32 to accommodate the elastic deformation of the elastic element 423, providing sufficient space for elastic element 423 to expand and contract. During torque adjustment or clutch operations, the elastic element 423 can freely compress or expand, fully utilizing its elastic force to drive the sleeve 427 to move the check member 41, achieving connection or disconnection between the check member 41 and the common transmission element 51 and adjusting the check torque. Without this clearance, the deformation of the elastic element 423 would be restricted, preventing normal operation and thus affecting the check function.

[0058] The axial ends of the sleeve 427 respectively contact the collar 426 and the stopper 422, precisely controlling the axial movement range of the sleeve 427. This allows the elastic element 423 to precisely control the movement position of the check member 41, further enhancing the precise connection and disconnection between the check member 41 and the common transmission member 51 and the precise adjustment of the check torque. For example, when adjusting the check torque, changes in the compression of the elastic element 423 can be accurately transmitted to the check member 41 via the sleeve 427, enabling fine adjustment of the check torque and improving the control accuracy of the electric cylinder's check function.

[0059] By setting a reasonable motion clearance and accurately positioning the sleeve 427, it is possible to select an elastic element 423 with an appropriate elastic coefficient and optimize its elastic deformation according to different operating conditions and load requirements. This allows the electric cylinder's check system to better adapt to different operating conditions, providing reliable check protection and precise torque adjustment for both light and heavy loads, thus expanding the application range of the electric cylinder.

[0060] In this embodiment, the second bearing seat 32 is provided with a bearing end cover 424, the first friction member 433 is mounted on the bearing end cover 424, and the threaded sleeve 421 is limited by the second bearing seat 32 and the bearing end cover 424 at both ends along the axial direction of the check shaft 410.

[0061] In actual use, mounting the first friction member 433 on the bearing end cap 424 of the second bearing seat 32 provides a stable and reliable mounting base for the first friction member 433. The bearing end cap 424 closely fits the second bearing seat 32, ensuring that the first friction member 433 does not loosen or shift during operation. This ensures stable friction between the first and second friction members 433, 434, and makes the generation and adjustment of the backstop torque more reliable, effectively improving the stability and accuracy of the backstop function. The threaded sleeve 421 is limited at both ends of the backstop shaft 410 along the axial direction by the second bearing seat 32 and the bearing end cap 424, respectively. This limiting mechanism precisely controls the position of the threaded sleeve 421 and prevents unnecessary axial movement. The stable position of the threaded sleeve 421 is crucial for rotating it to drive the second friction member 434 into contact and compression with the first friction member 433, ensuring accurate and stable operation of the torque adjustment mechanism 43 and achieving precise adjustment of the backstop torque.

[0062] The provision of the bearing end cap 424 facilitates the installation and removal of the first friction member 433. During installation, the first friction member 433 can be first installed on the bearing end cap 424, and then the bearing end cap 424 can be installed on the second bearing seat 32. During removal, the first friction member 433 can be easily removed for inspection, maintenance, or replacement by simply removing the bearing end cap 424. Similarly, the installation and removal of the threaded sleeve 421 are also more convenient due to this positioning structure, reducing the difficulty and workload of equipment maintenance. The stable installation of the first friction member 433 and the precise positioning of the threaded sleeve 421 reduce the probability of failure caused by loose or displaced components. During the long-term operation of the electric cylinder, all components can maintain good working condition, and the backstop function and torque adjustment function can continue to function stably, thereby improving the reliability and service life of the electric cylinder system and reducing equipment maintenance costs and downtime.

[0063] In this embodiment, the first gear 510 and the second gear 52 are both bevel gears 520 , and are arranged crosswise between the axial direction of the output shaft of the power source 1 and the axial direction of the check shaft 410 .

[0064] In actual use, the first gear 510 and the second gear 52 use bevel gears 520, and the axial direction of the output shaft of the power source 1 is arranged to cross the axial direction of the check shaft 410, which can greatly optimize the internal space layout of the electric cylinder. It can break through the spatial limitations of traditional parallel shaft transmission, adapt to complex installation environments, and realize the integration of power transmission and check functions in a limited space, which facilitates the compact design of equipment and is particularly suitable for application scenarios with strict requirements on spatial dimensions. The bevel gear 520 can realize transmission between intersecting axes. Compared with ordinary cylindrical gears, it can accurately change the direction of the torque output by the power source 1 to meet the specific requirements of the telescopic cylinder assembly 2 for the power transmission direction. This special transmission method can also efficiently transmit power, reduce energy loss, ensure that the output shaft of the power source 1 stably drives the telescopic rod of the telescopic cylinder assembly 2 to extend or retract, and improve the overall operating efficiency of the electric cylinder.

[0065] The intersecting arrangement of the output shaft of power source 1 and check shaft 410, coupled with the transmission of bevel gear 520, ensures a more direct and effective application of the check torque applied by check shaft 410 to second gear 52. Check shaft 410 effectively resists the reverse force exerted by the load on the telescopic rod, enhancing the check assembly 4's ability to provide opposing torque to the load, effectively preventing unintended movement of the load due to external forces and improving the safety and stability of equipment operation.

[0066] In this embodiment, the electric cylinder also includes an intelligent control system, which is respectively connected to the clutch mechanism 42, the torque adjustment mechanism 43, and the power source 1. Through preset program logic, the clutch mechanism 42 is automatically controlled to switch between the check / non-check state and the torque output by the torque adjustment mechanism 43 according to the working state of the electric cylinder, thereby realizing intelligent and automatic operation of the electric cylinder.

[0067] During actual use, the intelligent control system automatically adjusts the clutch mechanism 42 and torque adjustment mechanism 43 according to pre-set program logic, eliminating the need for manual operation. This significantly improves the automation level of the electric cylinder and is suitable for various complex, high-precision automated production lines, enhancing production efficiency and consistency. It dynamically adjusts the check / non-check state and output torque in real time based on the electric cylinder's operating conditions, such as load changes and operating speed. It increases torque under heavy loads and adjusts torque promptly under light loads, ensuring the equipment is always in optimal operating condition and improving operating accuracy and stability. It avoids equipment failures caused by human error. Stable and precise automatic control reduces component wear and impact, extends the service life of the electric cylinder and its components, reduces equipment maintenance costs, and improves overall reliability and safety.

[0068] In this embodiment, an angle sensor is also installed on the supporting seat 3. The angle sensor is connected to the check shaft 410 and is used to monitor the rotation angle of the check shaft 410 in real time and feed back the angle signal to the intelligent control system, thereby accurately controlling the positioning accuracy of the electric cylinder in the check state.

[0069] During actual use, the angle sensor monitors the rotation angle of check shaft 410 in real time and feeds the precise angle signal back to the intelligent control system. The system then precisely adjusts and controls the system to ensure the electric cylinder can be accurately positioned in the check state, meeting the requirements of work scenarios with strict positioning accuracy. Based on real-time angle feedback, the intelligent control system can promptly detect abnormal rotation of check shaft 410 and make rapid adjustments to avoid equipment jitter or unstable operation caused by angle deviation, ensuring the smooth operation of the electric cylinder and extending the equipment's service life. The angle sensor provides key data support for the intelligent control system, enabling it to flexibly adjust the control strategy based on changes in the angle of check shaft 410, further improving the intelligence level of the electric cylinder and achieving more efficient and intelligent automated operation.

[0070] In this embodiment, a pressure detection device is provided in the cylinder assembly for detecting pressure changes in the cylinder. The pressure detection device is electrically connected to the torque adjustment mechanism 43. When it is detected that the pressure in the cylinder exceeds a preset range, the torque adjustment mechanism 43 automatically increases the check torque to prevent accidental retraction of the piston rod due to abnormal pressure.

[0071] During actual use, the pressure detection device constantly monitors the pressure changes in the cylinder body. Once the pressure exceeds the preset range, the torque adjustment mechanism 43 responds quickly and automatically increases the check torque. This effectively prevents the accidental retraction of the piston rod due to abnormal pressure, avoids possible equipment damage, material leakage and personnel safety accidents, and greatly improves the safety and reliability of equipment operation. The pressure detection device is electrically connected to the torque adjustment mechanism 43 to form a real-time feedback adjustment mechanism. According to the dynamic changes of the key operating parameter of the pressure in the cylinder body, the check torque can be adjusted instantly and accurately to ensure that the electric cylinder is always in a safe and stable working state. This intelligent adjustment does not require human intervention, greatly improves the ability of the equipment to cope with complex working conditions, and ensures the continuity and efficiency of work.

[0072] In this embodiment, the clutch mechanism 42 also includes a first driver 428 and a displacement sensor. The first driver 428 is connected to the threaded sleeve 421 via a first transmission mechanism 429, and is used to drive the threaded sleeve 421 to rotate, thereby driving the limit member 424 to cause the check shaft 410 to axially displace; the displacement sensor is used to monitor the axial displacement of the limit member 424 and feed back the displacement signal to the intelligent control system. The intelligent control system controls the start and stop of the first driver 428 according to a preset displacement threshold to achieve automatic control of the connection or disconnection between the check shaft 410 and the gear set 5.

[0073] In actual use, the first driver 428 drives the threaded sleeve 421 to rotate through the first transmission mechanism 429, causing the limit member 424 to move, thereby connecting or disconnecting the check shaft 410 from the gear set 5. In conjunction with the intelligent control system and displacement sensor, no manual operation is required, and automatic control can be performed according to a preset threshold value, thereby improving the automation level of the electric cylinder operation. It is suitable for scenarios such as automated production lines and improves work efficiency. The displacement sensor monitors the axial displacement of the limit member 424 in real time and feeds the signal back to the intelligent control system. The system accurately controls the start and stop of the first driver 428 according to the preset displacement threshold value, and can accurately control the action of the clutch mechanism 42, ensuring that the check shaft 410 and the gear set 5 are connected or disconnected at the appropriate position, improving the accuracy and reliability of the electric cylinder operation and avoiding failures caused by improper operation or inaccurate control.

[0074] The intelligent control system flexibly adjusts the displacement threshold according to different work requirements and working conditions, allowing the clutch mechanism 42 to adapt to a variety of working scenarios. Whether frequent switching between check and non-check states is required, or precise requirements for connection and disconnection positions under specific working conditions, these can be met by adjusting preset parameters, enhancing the versatility and adaptability of the electric cylinder.

[0075] In this embodiment, the torque adjustment mechanism 43 also includes a second driver 437 and a pressure sensor. The second driver 437 is connected to the adjusting nut 435 via the second transmission mechanism 438, and is used to drive the adjusting nut 435 to rotate, thereby adjusting the contact pressure between the second friction member 434 and the first friction member 433; the pressure sensor is arranged between the first friction member 433 and the second friction member 434, and is used to detect the contact pressure between the two in real time, and feed back the pressure signal to the intelligent control system. The intelligent control system controls the operation of the second driver 437 according to the preset pressure value to realize automatic adjustment of the output torque of the output shaft and the backstop torque.

[0076] In actual use, the second actuator 437 drives the adjustment nut 435. Combined with pressure sensor feedback and an intelligent control system, the contact pressure between the second friction member 434 and the first friction member 433 is automatically and precisely adjusted based on a preset pressure value. This enables automated regulation of the output shaft torque and backstop torque, meeting the demand for precise torque control in various complex operating conditions and significantly improving the equipment's operational accuracy and stability. The pressure between the moving second friction member 434 is monitored in real time. When the pressure deviates from the preset value, the intelligent control system rapidly adjusts the operation of the second actuator 437. This prevents problems such as excessive wear of the friction plate and unstable equipment operation caused by abnormal pressure, reduces the probability of equipment failure, extends the overall equipment life, and ensures long-term reliable operation.

[0077] The intelligent control system flexibly modifies preset pressure values ​​based on different operating scenarios and load requirements. Whether operating under heavy or light loads, or requiring frequent torque adjustments, the torque adjustment mechanism 43 responds quickly and precisely, significantly enhancing the electric cylinder's adaptability to diverse operating environments and broadening its application range. Operators simply set the target pressure value in the intelligent control system, and the system automatically completes the entire torque adjustment process, eliminating the need for tedious manual adjustments. This reduces operational difficulty, improves work efficiency, and reduces errors caused by improper operation, providing operators with a more convenient and efficient operating experience.

[0078] In this embodiment, the friction assembly 431 has a spring group 439, and the second friction member 434 contacts the first friction member 433 through the preload force of the spring group 439. The adjusting nut 435 drives the second friction member 434 to compress the spring group 439 to adjust the contact pressure; when the check shaft 410 is subjected to reverse torque, the spring group 439 releases stored energy to increase the contact pressure, thereby preventing the check shaft 410 from reversing; the spring group 439 is a disc spring 4390, and the preload force is adjustable in the range of 500-2000N; when the rotation speed of the check shaft 410 exceeds a set threshold, the spring group 439 releases stored energy within 50ms, increasing the contact pressure to 120%-150% of the rated value.

[0079] In actual use, the design of spring assembly 439 enables adaptive adjustment of friction assembly 431. During normal operation, the second friction member 434 contacts the first friction member 433 through the preload of spring assembly 439, maintaining a certain contact pressure to transmit torque. When the check shaft 410 is subjected to reverse torque, spring assembly 439 releases stored energy, automatically increasing the contact pressure, effectively preventing the check shaft 410 from reversing. This adaptive adjustment eliminates the need for complex external control systems and can respond quickly and in real time to torque changes, ensuring stable operation of the electric cylinder under complex working conditions. Spring assembly 439 utilizes disc springs 4390 with an adjustable preload range of 500-2000N, providing users with great flexibility. Users can precisely adjust the preload of spring assembly 439 based on actual work requirements, such as load weight and working environment. Under light load conditions, the preload force can be set at a lower level to reduce unnecessary energy loss and friction plate wear; under heavy load conditions, the preload force is increased to ensure sufficient contact pressure to transmit torque and achieve the backstop function.

[0080] When the speed of check shaft 410 exceeds a set threshold, spring assembly 439 releases stored energy within 50 milliseconds, increasing the contact pressure to 120%-150% of the rated value. This rapid response mechanism is crucial for ensuring safe and stable equipment operation. In some high-speed equipment, when an abnormal situation causes the speed of check shaft 410 to suddenly increase, spring assembly 439 reacts within a very short period of time, rapidly increasing the contact pressure and effectively preventing further reverse rotation of check shaft 410, thereby preventing equipment damage or safety accidents caused by uncontrolled speed.

[0081] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can, without departing from the scope of the technical solution of the present invention, make some changes or modifications to equivalent embodiments using the technical contents disclosed above. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An electric cylinder with a check and return function, comprising a power source (1), a telescopic cylinder assembly (2) and a bearing seat (3), characterized in that: The invention also includes a check assembly (4), wherein the power source (1), the telescopic cylinder assembly (2), and the check assembly (4) are all arranged on the bearing seat (3), and the bearing seat (3) has a common transmission member (51). The power source (1) drives the telescopic rod of the telescopic cylinder assembly (2) to extend or retract via the common transmission member (51). The check assembly (4) acts on the common transmission member (51) to provide an opposite torque to the load member applied to the telescopic rod of the telescopic cylinder assembly (2). The check assembly (4) has a check member (41) and a torque adjustment mechanism (43) acting on the common transmission member (51). The torque adjustment mechanism (43) adjusts the torque applied by the check member (41) to the common transmission member (51). The common transmission member (51) is a first gear (510) rotatably provided on the bearing seat (3); the bearing seat (3) is rotatably provided with a second gear (52) meshing with the first gear (510); the first gear (510) and the second gear (52) are combined to form a gear set (5); the check member (41) is a check shaft (410) fixedly connected to the second gear (52); the output shaft of the power source (1) is matched with the first gear (510); and the torque adjustment mechanism (43) acts on the check shaft (410).

2. The electric cylinder with a check and return function according to claim 1, characterized in that: The electric cylinder with a check and return function further comprises a clutch mechanism (42), the clutch mechanism (42) comprising a threaded sleeve (421), a limiting member (422) and an elastic element (423), the threaded sleeve (421) being threadedly connected to the bearing seat (3); The limiting member (422) is arranged on the check member (41), and the threaded sleeve (421) is used to cooperate with the contacting limiting member (422); the check member (41) is movably arranged on the bearing seat (3), and the elastic force of the elastic element (423) drives the limiting member (422) to move relative to the bearing seat to drive the check member (41) to move; The threaded sleeve (421) rotates to drive the check member (41) to drive the limiting member (422) to move, so that the elastic element (423) is compressed or released, thereby achieving connection or disconnection between the check member (41) and the common transmission member (51).

3. The electric cylinder with a check function according to claim 2, characterized in that: The bearing seat (3) is slidably provided with a shaft sleeve (427), the shaft sleeve (427) being provided with a boss for contacting the bearing seat (3), and the shaft sleeve (427) being sleeved on the outer side of the check member (41); the two ends of the elastic element (423) acting on the bearing seat (3) and the shaft sleeve (427) respectively; the bearing seat (3) is provided with a threaded hole, the limiting member (422) is located in the threaded hole, one end of the threaded sleeve (421) is provided with a threaded column screwed into the threaded hole, the free end of the threaded column is used to contact the limiting member (422), and the threaded sleeve (421) is provided with a disc protrusion located outside the bearing seat (3) for easy gripping.

4. The electric cylinder with a check and return function according to claim 1, characterized in that: The torque adjustment mechanism (43) comprises a friction component (431) and a friction drive component (432) for driving the friction component (431) to move; the friction drive component (432) drives the friction component (431) to move, thereby changing the friction force between the check member (41) and the bearing seat (3), thereby adjusting the magnitude of the check torque applied by the check member (41) to the common transmission member (51).

5. The electric cylinder with a check and return function according to claim 4, characterized in that: The friction assembly (431) comprises a first friction member (433) fixedly connected to the bearing seat (3) and a second friction member (434) axially movable and sleeved on the outside of the backstop member (41); the friction drive assembly (432) comprises an adjusting nut (435) screwed to the backstop member (41), and the adjusting nut (435) is rotated to drive the second friction member (434) to contact and press the first friction member (433), and the backstop torque is the friction torque generated by the pressing force between the first friction member (433) and the second friction member (434).

6. The electric cylinder with a check and return function according to claim 1, characterized in that: The bearing seat (3) comprises a first bearing seat (31) for mounting the output shaft of the power source (1) and a second bearing seat (32) for mounting the check shaft (410), wherein the second bearing seat (32) is mounted on the first bearing seat (31); the output shaft of the power source (1) and the check shaft (410) are both mounted on the bearing seat via a bearing assembly (33), wherein the bearing assembly (33) comprises two support bearings (34) arranged opposite to each other in the axial direction, wherein the outer rings of the support bearings (34) are clearance-fitted with the bearing seat; the two support bearings (34) are used to support the output shaft or the check member (41).

7. The electric cylinder with a check and return function according to claim 5, characterized in that: The check member (41) is provided with an internal thread (436), and the adjusting nut (435) is threadedly connected to the internal thread (436); the outer diameter of the first friction member (433) is larger than the maximum outer diameter of the adjusting nut (435); the second friction member (434) is in a frustum-shaped structure, and its outer diameter gradually increases from one end close to the adjusting nut (435) to the side of the first friction member (433), and a conical surface matching structure is formed between the second friction member (434) and the first friction member (433), and the second friction member (434) is driven to move by the adjusting nut (435), thereby adjusting the contact pressure between the first friction member (433) and the second friction member (434).

8. The electric cylinder with a check and return function according to claim 6, characterized in that: The first bearing seat (31) is provided with a rotating driven shaft (35) via a bearing assembly (33); one axial end of the driven shaft (35) is connected to the output shaft of the power source (1), and the other end is connected to the piston rod of the telescopic cylinder assembly (2) via a synchronous wheel assembly (36).

9. The electric cylinder with a check and return function according to claim 1, characterized in that: One end of the check member (41) away from the common transmission member (51) is connected to a detachable handle (6). The check member (41) is rotatably arranged on the bearing seat (3). One end of the handle (6) is connected to the check member (41), and the other end is connected to the operating end (61). The user drives the check member (41) to rotate by holding the operating end (61), thereby realizing manual lifting and lowering of the telescopic cylinder assembly (2).

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