Sealed push chain linear actuating device
The internal oil storage lubrication and precise guide design of the sealed push chain linear actuator solves the problems of easy oil shedding and easy wear of the guide rails in traditional lubrication methods, achieving efficient and safe lubrication effects and device stability.
Patent Information
- Application Number
- CN202422663653.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-01
- Publication Date
- 2025-09-12
- Estimated Expiration
- 2034-11-01
AI Technical Summary
Traditional lubrication methods are not effective in high-speed push chains, causing the lubricant to easily fall off or evaporate, requiring frequent maintenance, affecting production continuity and safety. In addition, traditional guide rail structures are prone to wear, reducing the stability and life of the device.
The sealed push chain linear actuator adopts internal oil storage lubrication, box sealing groove and built-in guide groove design, combined with the accordion cover and stop block to achieve effective storage of lubricating oil and precise guidance of the push chain, reducing maintenance frequency and enhancing structural strength and safety.
It improves lubrication effect, reduces labor costs, extends device life, ensures production stability and safety, and reduces lubricant leakage and environmental pollution.
Smart Images
Figure CN223331055U_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of linear actuating devices, and in particular relates to a sealed push chain linear actuating device. Background Art
[0002] In existing technologies, push chains, as a crucial component of linear actuators, are used in a variety of automated production lines and precision equipment. As modern industry demands ever-increasing speed, precision, and continuous operation, push chain lubrication has become a key factor limiting device performance and reliability.
[0003] Traditional lubrication methods typically rely on manual brush application to regularly apply lubricant to the push chain to ensure smooth operation. However, this approach is particularly unsuitable in high-speed environments. First, at high speeds, the lubricant is easily lost or evaporated, resulting in reduced lubrication effectiveness. Frequent lubrication operations not only significantly increase labor costs but also disrupt the continuous flow of the production line, increasing equipment downtime. Second, the push chain's lubrication requirements increase significantly at high speeds. Without timely and effective lubrication, friction between the push chain, sprockets, and guide rails increases dramatically, generating significant heat. This can lead to serious failures such as overheating, deformation, and even breakage of the push chain, exacerbating localized wear and shortening its overall lifespan, posing a serious threat to the stability and safety of the entire production line. Lubricant splashing from the push chain also pollutes the surrounding environment. In modern industrial environments, which strive for efficient, clean, and automated production, this traditional maintenance method is clearly no longer sufficient. Optimizing lubrication has become a bottleneck hindering equipment performance improvement and optimizing production costs.
[0004] To prevent the push chain from dislodging during high-speed operation, the system is designed to store a portion of the push chain in the drive box when the push chain reaches its maximum travel. While this design prevents the push chain from dislodging to a certain extent, under extreme operating conditions or in the event of an accident, the entire push chain may still be pulled out of the device, posing a potential threat to the operator and the device itself.
[0005] During high-speed operation, the traditional split-type box structure uses multiple box bolts to connect, and internal guide rails are installed to guide the push chain. This method may cause the push chain and the box to collide frequently due to inaccurate box docking positions, generating vibration and noise, affecting the quality of the working environment and the comfort of the operator. At the same time, the internal guide rail is a key component supporting the stable operation of the push chain. If the design strength is not sufficient to withstand the load of long-term high-speed movement, it will accelerate wear and shorten the service life, thereby affecting the operating efficiency and reliability of the entire system. Utility Model Content
[0006] In response to the problems of the existing technology, the present invention discloses a sealed push chain linear actuating device, which adopts a push chain as the pushing actuator, is driven by an external motor connected to the motor shaft, and is directly driven by the integrated structure of the sprocket and the shaft, thereby reducing the intermediate transmission links and improving the transmission efficiency and stability of the device; reducing the maintenance frequency by means of internal oil storage lubrication, reducing labor costs, and increasing the service life and overall production efficiency; avoiding lubricating oil leakage by means of the box sealing groove and the accordion cover; achieving precise guidance of the push chain inside the box by means of the built-in guide groove of the box, thereby improving the stability and accuracy of the push chain operation, enhancing the overall structural strength of the box, and extending the service life; and achieving a limit stop by arranging a stop block at the tail end of the push chain to cooperate with the protrusion in the box, thereby improving the safety and reliability of the device.
[0007] To achieve the above purpose, the new technical solution is:
[0008] A sealed push chain linear actuating device includes an engaged push chain system. A push chain output port is provided at the top of the case of the engaged push chain system. The push chain output port is fixedly connected to an accordion cover. The top of the accordion cover is fixedly connected to the head of the push chain and expands and contracts together when the push chain moves linearly. An oil filling hole is provided at the bottom of the side wall of the case of the engaged push chain system, and an oil outlet hole is provided at the bottom end of the case.
[0009] Preferably, the box body is formed by docking a first half shell and a second half shell, and a sealing groove is provided at the edge docking of the first half shell or the second half shell, and a sealing strip is provided in the sealing groove. The first half shell and the second half shell are positioned to each other by positioning pins and locked by screws, and guide rail grooves are provided on the inner surfaces of the first half shell and the second half shell. When the first half shell and the second half shell are positioned and locked, the relative guide rail grooves constitute the guide rail mechanism of the push chain.
[0010] Preferably, the guide rail mechanism includes a first guide rail mechanism located on the left side of the box body and a second guide rail mechanism located on the right side of the box body, the first guide rail mechanism is slidably connected to the chain 1, the second guide rail mechanism is slidably connected to the chain 2, the pin ends of the chain 1 and the chain 2 are respectively slidably connected to the guide rail grooves arranged opposite to the inner surfaces of the first half shell and the second half shell, a push chain output channel is provided between the first guide rail mechanism and the second guide rail mechanism, the chain 1 and the chain 2 are meshed and connected to form a push chain in the push chain output channel, the upper end of the push chain output channel is the push chain output port, the lower port of the accordion cover is fixedly connected to the push chain output port, the upper port is sealed and fixedly connected to the mounting plate, and the lower surface of the mounting plate is fixedly connected to the top of the push chain.
[0011] Preferably, the first guide rail mechanism and the second guide rail mechanism are provided with a horizontal section at the bottom of the box body, and the end of the horizontal section extends longitudinally toward the inside of the push chain output channel, and the oil level of the lubricating oil in the box body is higher than the height of chain one and chain two at the horizontal section.
[0012] Preferably, a stop block is provided on the outer edge of the inner link plate or outer link plate at the tail end of chain one or chain two, and a protrusion is fixedly connected to the inner wall of the first half shell and the second half shell where one side of the push chain output channel is located, and the stop block is used in conjunction with the protrusion.
[0013] Preferably, the oil filling holes and oil outlet holes are provided in two groups, and the two groups of oil filling holes and oil outlet holes are respectively arranged on the outer wall and bottom of the first half shell or the second half shell corresponding to the bottom of the first guide rail mechanism and the second guide rail mechanism, and the oil filling holes and oil outlet holes are both equipped with oil plugs and sealing rings.
[0014] The beneficial effects of this new sealed push chain linear actuating device are:
[0015] (1) This new model adds oil filling and oil outlet ports to the box body and strictly seals them to achieve internal oil storage and lubrication, effectively reducing maintenance frequency, reducing labor costs, and improving service life and overall production efficiency;
[0016] (2) This novel structure realizes the precise guidance of the push chain inside the box through the sealed box with built-in guide rail grooves, reduces the vibration and noise caused by inaccurate docking between the boxes, improves the stability and accuracy of the push chain in the box, enhances the structural strength of the box, and ensures the efficient and smooth operation of the linear actuator;
[0017] (3) This new model ensures that the device can maintain stable operation under high-speed or emergency conditions by setting a stop block at the end of the push chain to cooperate with the protrusion in the box to limit the position, thereby improving the overall safety and reliability;
[0018] (4) The new model improves the sealing reliability and cleanliness of the device by providing sealing grooves in the box body, oil plugs and sealing rings at the opening positions, and an accordion cover on the extended part of the push chain. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 This is a schematic diagram of the external structure of this new model.
[0020] Figure 2 Schematic diagram of the internal structure of the new device in the retracted state.
[0021] Figure 3 Schematic diagram of the internal structure of the new lifting state.
[0022] Figure 4 Schematic diagram of the structure of the second half shell.
[0023] 1. Box body; 1-1. First half shell; 1-2. Second half shell; 2. Bellows cover; 3. Motor mounting hole; 4. Device mounting hole; 5. Oil filling hole; 6. Push chain output port; 7. Guide rail groove; 8. First guide rail mechanism; 9. Second guide rail mechanism; 10. Stop block; 11. Sealing groove; 12. Oil plug; 13. Chain 1; 14. Chain 2; 15. Push chain; 16. Oil level; 17. Horizontal section; 18. Bump; 19. Oil outlet hole; 20. Push chain output channel. DETAILED DESCRIPTION
[0024] The following description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
[0025] The following embodiments may be understood as individually expressing a part of the local structure or method of the present invention, or may be understood as a combination of the embodiments to explain the connotation of a larger structure or method of the present invention.
[0026] Example 1
[0027] A sealed push chain linear actuator, such as Figure 1-4 As shown, it includes a meshing push chain system, a push chain output port 6 is provided on the top of the box body 1 of the meshing push chain system, and the push chain output port is fixedly connected to the accordion cover 2. The top of the accordion cover 2 is fixedly connected to the head of the push chain, and they extend and retract together when the push chain moves linearly. An oil filling hole 5 is provided at the bottom of the side wall of the box body 1 of the meshing push chain system, and an oil outlet hole 19 is provided at the bottom end of the box body 1.
[0028] In this embodiment, the specific structure and principle of the meshing push chain system can be found in the existing patent CN220131061U, a meshing push chain system. This new model is a further improvement made on the basis of this patent. For the contents not described in this new model, please refer to the technical solution of this patent.
[0029] Example 2
[0030] like Figure 1 、 4 As shown, the box body 1 is formed by docking a first half shell 1-1 and a second half shell 1-2. A sealing groove 11 is provided at the edge docking position of the first half shell 1-1 or the second half shell 1-2. A sealing strip is provided in the sealing groove 11. Opposite guide rail grooves 7 are provided on the inner surfaces of the first half shell 1-1 and the second half shell 1-2. When the first half shell 1-1 and the second half shell 1-2 are positioned and locked, the relative guide rail grooves 7 constitute the guide rail mechanism of the push chain.
[0031] like Figure 2 、 3 As shown, the guide rail mechanism includes a first guide rail mechanism 8 located on the left side of the box body 1 and a second guide rail mechanism 9 located on the right side of the box body 1, a chain 13 is slidably connected to the first guide rail mechanism 8, and a chain 2 14 is slidably connected to the second guide rail mechanism, and the pin ends of the chain 13 and the chain 2 14 are respectively slidably connected to the guide rail grooves 7 arranged opposite to the inner surfaces of the first half shell 1-1 and the second half shell 1-2, and a push chain output channel 20 is provided between the first guide rail mechanism 8 and the second guide rail mechanism 9, and the chain 13 and the chain 2 14 are meshed and connected in the push chain output channel 20 to form a push chain 15, and the upper end of the push chain output channel 20 is the push chain output port 6, the lower port of the accordion cover 2 is fixedly connected to the push chain output port, and the upper port is sealed and fixedly connected to the mounting plate, and the lower surface of the mounting plate is fixedly connected to the top of the push chain 15.
[0032] In this embodiment, the mechanism by which chain one and chain two are meshed and connected to form a rigid push chain is detailed in existing patent CN220131061U, a meshing push chain system. The external accordion cover effectively prevents the lubricating oil from being thrown out, and prevents external dust and impurities from entering the accordion cover, thereby avoiding surface contamination of the push chain and ensuring operational stability. After the first and second half shells are fixed by locating pins and screws, the relative positions of the guide rail grooves can be accurately ensured, avoiding collision and friction between chain one or chain two and the inner wall of the box. At the same time, by providing sealing grooves and sealing strips, this new model can achieve good sealing when the relative edges of the first and second half shells are plugged in, thus preventing lubricating oil leakage.
[0033] Example 3
[0034] like Figure 2 、 3 As shown, the first and second guide rail mechanisms 8 and 9 are provided with a horizontal section 17 at the bottom of the housing 1. The distal end of the horizontal section 17 extends longitudinally into the interior of the push chain output channel 20. The lubricating oil level within the housing 1 is higher than the height of chain 13 and chain 2 14 at the horizontal section, ensuring that chain 1 and chain 2 are fully soaked in lubricating oil at the horizontal section, thus ensuring stable operation of the push chain 15 and effective lubrication during operation. It is understood that lubricating oil splashed from the inner wall of the accordion cover can return to the horizontal section at the bottom of the housing due to its own gravity, thus achieving lubricating oil reuse.
[0035] Example 4
[0036] like Figure 3As shown, a stopper 10 is provided on the outer edge of the inner or outer link plate at the end of chain 13 or chain 2 14. A protrusion 18 is fixedly connected to the inner wall of the first and second half-shells 1-1, 1-2, where the push chain output channel 20 is located. The stopper 10 cooperates with the protrusion 18. When the push chain reaches its maximum stroke, the stopper abuts against the protrusion, preventing the chain from being thrown out of the housing.
[0037] Example 5
[0038] like Figure 1 、 2 As shown, there are two groups of oil filling holes 5 and oil outlet holes 19, and the two groups of oil filling holes 5 and oil outlet holes 19 are respectively arranged on the outer wall and bottom of the first half shell 1-1 or the second half shell 1-2 corresponding to the bottom of the first guide rail mechanism 8 and the second guide rail mechanism 9. The oil filling holes 5 and oil outlet holes 19 are both equipped with oil plugs 12 and sealing rings.
[0039] As described in the existing patent CN220131061U, a meshing push chain system, the push chain 15 is driven to rise and fall by the meshing of the sprocket, and the sprocket is connected to the motor outside the box through an integrally connected motor shaft. The bearing seat is installed on the side wall of the box and the bearing is connected to the motor shaft. This is a common structure and will not be described here.
[0040] The working principle of this new model:
[0041] 1. Precise positioning of the first and second half shells by locating pins and screws ensures precise positioning of the guide rails relative to each other. During operation of the push chain, both ends of the pin slide along the guide rails, precisely guiding the push chain within the housing. This improves operational stability and accuracy, ensuring efficient and smooth operation of the linear actuator. Furthermore, the built-in guide rails enhance the overall structural strength of the housing, making it more stable when bearing the forces transmitted by the push chain, further extending the service life of the device.
[0042] 2. The sealed housing is equipped with an oil inlet and outlet, utilizing internal oil storage for lubrication, ensuring the push chain is fully lubricated during high-speed operation. When the system is stopped, a fixed amount of lubricant can be injected from the housing's oil inlet to ensure continuous contact with the lubricant. After a certain period of operation, the lubricant can be discharged from the oil outlet at the bottom of the housing to maintain its cleanliness. To prevent the lubricant from leaking into the external environment during use, the internal oil storage and lubrication system utilizes a rigorous sealing structure, including sealing grooves at the housing's joints, oil plugs and sealing rings at the openings, and an accordion cover on the extended portion of the push chain.
[0043] 3. The accordion cover is installed on the top of the device. The expansion and contraction of the accordion cover is synchronized with the movement of the push chain, thereby realizing all-round and dynamic protection of the chain and preventing the intrusion of external debris and splashing of internal lubricating oil.
[0044] 4. The stop block at the tail end of the push chain cooperates with the protrusion in the box to play a role of limit protection, ensuring that the device can still maintain stable operation under high speed or emergency conditions, preventing the chain from falling out of the box, and improving the safety and reliability of the device.
[0045] 5. The sealed box is equipped with an oil filling port and an oil outlet, and adopts an internal oil storage lubrication method to reduce maintenance frequency, reduce labor costs, and increase service life and overall production efficiency.
[0046] 6. The sealed box has precision-machined guide rails built into it, allowing the push chain to be precisely guided within the box. This ensures smooth transitions between a rigid state (two push chains meshing to form a rigid chain column) and a flexible state (a single push chain) when the push chain is running.
Claims
1. A sealed push chain linear actuating device, characterized by: It includes an engaged push chain system, a push chain output port is provided on the top of the box body of the engaged push chain system, the push chain output port is fixedly connected to an accordion cover, the top of the accordion cover is fixedly connected to the head of the push chain, and they extend and retract together when the push chain moves linearly, an oil filling hole is provided at the bottom of the side wall of the box body of the engaged push chain system, and an oil outlet hole is provided at the bottom end of the box body.
2. A sealed push chain linear actuating device according to claim 1, characterized in that: The box body is formed by docking a first half shell and a second half shell, and a sealing groove is provided at the edge docking of the first half shell or the second half shell, and a sealing strip is provided in the sealing groove. The first half shell and the second half shell are positioned to each other by positioning pins and locked by screws. Opposite guide rail grooves are provided on the inner surfaces of the first half shell and the second half shell. When the first half shell and the second half shell are positioned and locked, the relative guide rail grooves constitute the guide rail mechanism of the push chain.
3. A sealed push chain linear actuating device according to claim 2, characterized in that: The guide rail mechanism includes a first guide rail mechanism located on the left side of the box body and a second guide rail mechanism located on the right side of the box body, a chain 1 is slidably connected to the first guide rail mechanism, and a chain 2 is slidably connected to the second guide rail mechanism, and the pin ends of the chain 1 and the chain 2 are respectively slidably connected to the guide rail grooves arranged opposite to the inner surfaces of the first half shell and the second half shell, and a push chain output channel is provided between the first guide rail mechanism and the second guide rail mechanism, and the chain 1 and the chain 2 are meshed and connected to form a push chain in the push chain output channel, and the upper end of the push chain output channel is the push chain output port, the lower port of the accordion cover is fixedly connected to the push chain output port, and the upper port is sealed and fixedly connected to the mounting plate, and the lower surface of the mounting plate is fixedly connected to the top of the push chain.
4. A sealed push chain linear actuating device according to claim 3, characterized in that: The first guide rail mechanism and the second guide rail mechanism are provided with a horizontal section at the bottom of the box body, and the end of the horizontal section extends longitudinally into the push chain output channel. The oil level of the lubricating oil in the box body is higher than the height of chain one and chain two at the horizontal section.
5. A sealed push chain linear actuating device according to claim 4, characterized in that: A stop block is provided on the outer edge of the inner link plate or outer link plate at the tail end of chain one or chain two, and a protrusion is fixedly connected to the inner wall of the first half shell and the second half shell where one side of the push chain output channel is located, and the stop block is used in conjunction with the protrusion.
6. A sealed push chain linear actuating device according to claim 5, characterized in that: There are two groups of oil filling holes and oil outlet holes, which are respectively arranged on the outer wall and bottom of the first half shell or the second half shell corresponding to the bottom of the first guide rail mechanism and the second guide rail mechanism. The oil filling holes and oil outlet holes are both equipped with oil plugs and sealing rings.