A linear actuator

Abstract

The utility model discloses a linear actuator, integrated with driver, two same direction arrangement transmission part and with transmission part corresponding transmission connection independent sliding part, driver transmission connection or sliding part transmission, can drive and drive sliding part sliding, and make two sliding parts have different sliding speed, and the sliding direction of sliding part is same with the arrangement direction of transmission part, this actuator is multi -station differential speed design, and each sliding part forms independent station, is used for connecting different external movement component, drives external movement component to run with different speed through the differential motion of each sliding part, can preset motion locus, can also realize diversified function customization, satisfies the use demand of multi -station differential speed movement.

Description

Technical Field

[0001] This utility model relates to the field of furniture, and in particular to a linear actuator. Background Technology

[0002] As people's quality of life improves, their requirements for seating are also increasing. Some existing sofas use movable devices to change the sitting posture, thereby meeting the needs for functionality and comfort. In addition to seating, other furniture also has the need for moving parts, which adjusts the state through the movement of the parts to achieve specific functions.

[0003] Such movable devices typically have at least one linear actuator to drive their movement. Existing linear actuators generally use electric push rods, which offer greater controllability and stability after stopping, and can support the weight of the human body, at least in seating applications. However, existing linear actuators often only have one station, which limits the mobility of movable devices using such linear actuators. To solve this problem, manufacturers either increase the number of linear actuators to meet the movement needs of multiple components or design complex linkage mechanisms to transmit power between multiple moving parts. Both methods increase costs, especially since complex linkage mechanisms are time-consuming and labor-intensive to design, and the final results may still be unsatisfactory.

[0004] Therefore, there is an urgent need for a linear actuator that can realize multi-station motion, mainly in the differential motion of multi-station. Summary of the Invention

[0005] To address the aforementioned technical problems, this utility model provides a linear actuator integrating a driving component, two co-directionally arranged transmission components, and independent sliding components corresponding to and connected to the transmission components. The driving component is connected to the transmission components or sliding components, driving the sliding components to slide and enabling the two sliding components to have different sliding speeds. The sliding direction of the sliding components is the same as the arrangement direction of the transmission components. This actuator features a multi-station differential speed design, with each sliding component forming an independent station for connecting different external moving parts. Through the differential speed movement of each sliding component, the external moving parts are driven to run at different speeds. This design allows for both preset motion trajectories and customized diverse functions, meeting the usage requirements of multi-station differential speed motion.

[0006] The technical solution of this utility model is implemented as follows:

[0007] A linear actuator integrates two co-directionally arranged transmission elements, each transmission element being drivenly connected to an independent sliding element, and the arrangement direction of the transmission element is the same as the sliding direction of its corresponding sliding element; it also includes a driving element, which is drivenly connected to the transmission element or the sliding element and configured to drive the two sliding elements to move; and the two sliding elements have different sliding speeds.

[0008] This solution is a multi-station differential linear actuator. Each sliding member has a station, and each station is used to connect different external moving parts. When the sliding member slides, it drives the external moving parts to move. Based on the different sliding speeds of different sliding members, the external moving parts have different movement speeds, thereby adapting to the needs of multi-station differential motion. The movement trajectory of the external moving parts can be preset to achieve diversified functional customization.

[0009] Independent sliders refer to two sliders that are not directly related, such as having no direct connection or mutual transmission relationship.

[0010] When the transmission component is a lead screw, the sliding component is a lead screw nut or has a lead screw nut, the arrangement direction of the lead screw is the length direction of the lead screw, and the sliding direction of the sliding component is the length direction of the lead screw; when the transmission component is a lead screw nut, the sliding component is a lead screw or has a lead screw, the arrangement direction of the lead screw nut is the direction of the axis of the lead screw nut thread hole, and the sliding direction of the sliding component is the direction of the axis of the lead screw nut thread hole.

[0011] Preferably, all transmission components are driven simultaneously by a single drive element. This allows for the movement of all sliding components in the linear actuator with just a single drive element, resulting in low cost.

[0012] Preferably, the drive component and the two transmission components have different transmission ratios. By using different transmission ratios, the transmission components can move at different speeds, so that when the transmission component drives the sliding component to slide, the sliding component can slide at different speeds.

[0013] Preferably, the driving component is located at the front or rear end of the transmission component. Each transmission component is equipped with a transmission gear, and the driving component has an output gear that meshes with the transmission gear. The output gear is configured with different transmission ratios between itself and the two transmission gears. The transmission ratio between the output gear and each transmission gear affects the sliding speed of the corresponding sliding component. That is, the transmission ratio affects the movement speed of the transmission component, and the movement speed of the transmission component affects the sliding speed of the sliding component, ensuring that the two sliding components have different sliding speeds, so that the two workstations generate relative movement to achieve the required customized function.

[0014] Preferably, the transmission component is a lead screw, and the sliding component is threadedly connected to the transmission component. The two transmission components have different leads. Different sliding speeds of the sliding component at the same rotational speed are achieved by using the different leads of the lead screw.

[0015] Preferably, each transmission component is connected to a driving component, and each transmission component is driven by its corresponding driving component. The driving component is configured to drive the corresponding transmission component at different driving speeds, so that the sliding component has different sliding speeds.

[0016] Preferably, each transmission component is connected to a driving component, and each transmission component is driven by its corresponding driving component. The transmission component is a lead screw, and the sliding component is threadedly connected to the transmission component. Each driving component has the same driving speed, and the two transmission components have different leads.

[0017] Preferably, both transmission components are arranged parallel to each other. They can be arranged horizontally, vertically, circumferentially, or in an array; provided that different sliding components do not interfere with each other, the different transmission components can also be arranged in a non-parallel manner.

[0018] Preferably, the slider has a transmission connection hole, through which the slider is connected to the corresponding transmission component.

[0019] Preferably, at least one sliding member also has a clearance hole. This sliding member is fitted onto two transmission members through a transmission connection hole and a clearance hole, and is connected to one of the transmission members through the transmission connection hole. In actual products, the specific number and arrangement of transmission members can vary, such as two transmission members arranged in parallel or three transmission members distributed in a triangular pattern. The sliding member can also have multiple clearance holes, but at least one. In the triangular distribution of transmission members, the sliding member can be fitted onto only two transmission members or simultaneously onto all three transmission members. The transmission member is a lead screw, and the transmission connection hole is a threaded hole.

[0020] Preferably, the two transmission components are arranged in parallel vertically, and the two sliding components are simultaneously mounted on the two transmission components and are respectively connected to different transmission components.

[0021] Preferably, the system also includes a guide seat arranged in the front-to-back direction. The guide seat includes a front fixed seat and a rear fixed seat. The transmission components are arranged between the front fixed seat and the rear fixed seat, and the driving components are mounted on either the front fixed seat or the rear fixed seat. The front fixed seat and the rear fixed seat are used to stably mount the transmission components, and determining the arrangement direction of the transmission components also determines the sliding direction of the sliding components.

[0022] Preferably, the guide seat also includes a hollow sleeve disposed between the front and rear fixed seats; all transmission components are located within the sleeve; the sliding component includes an internal component and an external component, the external component is disposed outside the sleeve and connected to the internal component, the internal component is located within the sleeve, and the internal component is sleeved on the transmission component and connected to the corresponding transmission component for transmission. The sleeve can protect the transmission components and other parts, as well as the user; the sleeve can also support the external component, allowing the sliding component to maintain stable sliding.

[0023] Preferably, the external component includes a bushing, which is fitted over the sleeve and slides in engagement with the sleeve. This design increases the overall stability of the sliding component and prevents the sliding component from being entirely supported by the transmission component, thereby preventing accelerated wear or jamming between the sliding component and the transmission component.

[0024] Preferably, the bushing includes a separate upper bushing and a lower bushing, and the external component also includes a fitting disposed outside the upper and lower bushings, the fitting being configured to confine the upper and lower bushings to the outer surface of the sleeve. The separation of the upper and lower bushings facilitates installation; in addition to being connected by the fitting, the upper and lower bushings can also be directly locked together by bolts.

[0025] Preferably, the assembly includes a base plate and a U-shaped pressing member. The base plate is located below the lower bushing, and the pressing member is fitted over both the upper and lower bushings from top to bottom and is fixedly connected to the base plate. The assembly further reinforces the bushing to keep the external component on the outer surface of the sleeve.

[0026] Preferably, the transmission component is a lead screw, the sliding component has a nut that is threadedly connected to the transmission component, and the driving component is configured to drive the lead screw or the nut to rotate. In this case, it is common for the driving component to drive the lead screw to rotate, thereby causing the nut to slide and thus the sliding component to slide. When the nut is driven to rotate, the nut should rotate in coordination with the external sliding component. When the nut rotates, the lead screw remains stationary, so that the nut moves on the lead screw at the same time, thereby realizing the sliding of the sliding component.

[0027] Preferably, the transmission component is a lead screw nut, the sliding component has a lead screw threadedly connected to the transmission component, and the driving component is configured to drive the lead screw or lead screw nut to rotate. In this case, when the driving component drives the lead screw to rotate, the lead screw nut remains stationary, the driving component moves with the lead screw, and causes the sliding component to slide; when the driving component drives the lead screw nut to rotate, the lead screw slides, causing the sliding component to slide.

[0028] The design starting point, concept, and beneficial effects of this utility model, which adopts the above technical solution, are as follows:

[0029] This solution is a multi-station differential linear actuator. Each sliding member has a station, and each station is used to connect different external moving parts. When the sliding member slides, it drives the external moving parts to move. Based on the different sliding speeds of different sliding members, the external moving parts have different movement speeds, thereby adapting to the needs of multi-station differential motion. The movement trajectory of the external moving parts can be preset to achieve diversified functional customization. Attached Figure Description

[0030] Figure 1 This is a three-dimensional structural diagram of the linear actuator in an embodiment of the present invention;

[0031] Figure 2 This is a cross-sectional view of the first slider installed in the linear actuator in an embodiment of the present invention;

[0032] Figure 3 This is an exploded view of the first sliding member in an embodiment of the present invention;

[0033] Figure 4 This is a three-dimensional structural diagram of the meshing of the transmission gear and the output gear in an embodiment of the present invention;

[0034] Figure 5 This is a three-dimensional structural diagram of the actuation device when the backrest is upright in an embodiment of the present invention. Figure 1 ;

[0035] Figure 6 This is a three-dimensional structural diagram of the actuation device when the backrest is upright in an embodiment of the present invention. Figure 2 ;

[0036] Figure 7 This is a three-dimensional structural diagram of the actuation device when the backrest reclines in an embodiment of the present invention. Figure 1 ;

[0037] Figure 8 This is a three-dimensional structural diagram of the actuation device when the backrest reclines in an embodiment of the present invention. Figure 2 ;

[0038] Figure 9 This is a three-dimensional structural diagram of the rotating bracket being mounted on the second sliding member in an embodiment of the present invention;

[0039] Figure 10 This is a three-dimensional structural diagram of the seat when the backrest is upright in an embodiment of the present invention;

[0040] Figure 11 This is a three-dimensional structural diagram of the seat when the backrest is folded down in an embodiment of the present invention;

[0041] Figure 12 This is a side view of the seat with the backrest upright in an embodiment of the present invention;

[0042] Figure 13 This is a side view of the seat with the backrest folded down in an embodiment of the present invention;

[0043] Figure 14 This is a three-dimensional structural diagram of the actuation device of this utility model when it is packaged in an embodiment;

[0044] Figure 15 This is a three-dimensional structural diagram of two transmission components in the linear actuator of the present invention, which are distributed vertically and horizontally at intervals.

[0045] Figure 16 This is a side view of the two transmission components in the linear actuator of the present invention, which are arranged vertically and horizontally at intervals.

[0046] Figure 17This is a cross-sectional view of the present invention in an embodiment where the transmission component is a lead screw, the sliding component has a nut that is threadedly connected to the transmission component, and the driving component drives the nut to rotate.

[0047] Figure 18 This is a cross-sectional view of the present invention in an embodiment where the transmission component is a nut, the sliding component has a lead screw threadedly connected to the transmission component, and the driving component drives the lead screw to rotate.

[0048] Figure 19 In this embodiment of the present invention, the transmission component is a nut, the sliding component has a screw threadedly connected to the transmission component, and two driving components drive two nuts to rotate.

[0049] Figure 20 In this embodiment of the present invention, the transmission component is a nut, the sliding component has a screw threadedly connected to the transmission component, and a single driving component drives two nuts to rotate.

[0050] The reference numerals in the attached figures are as follows: guide seat 1; driving component 2; transmission component 300; first transmission component 301; second transmission component 302; sliding component 400; first sliding component 401; second sliding component 402; built-in component 41; external component 42; upper bushing 44; lower bushing 45; base plate component 47; lower pressing component 48; clearance hole 49; output gear 5; transmission gear 600; first gear 61; second gear 62; sleeve 7; clearance groove 71; front end fixing seat 8; rear end fixing seat 9; back connector 10; extension seat 12; driven connecting rod 13; extended seat 14; rotating bracket 15; first rotating bracket 151; second rotating bracket 152; limiting part 153; base 16; backrest 17; seat part 18. Detailed Implementation

[0051] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0052] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0053] In the description of this utility model, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0054] The specific implementation of this utility model is as follows:

[0055] like Figure 1-4As shown in Figures 15 and 16, this utility model provides a multi-station differential linear actuator, which includes a guide seat 1 arranged in the front-rear direction. A driving member 2 is provided on the guide seat 1. The driving member 2 is a motor. At least two transmission members 300 arranged in the same direction are driven to the driving member 2. The transmission members 300 are lead screws. The driving member 2 drives the transmission members 300 to rotate. The transmission members 300 are arranged along the length direction of the guide seat 1. The guide seat 1 is hollow. All transmission members 300 are disposed in the guide seat 1. Each transmission member 300 is driven to an independent sliding member 400, and the arrangement direction of the transmission member 300 corresponds to its sliding direction. The sliding parts 400 have the same sliding direction. The sliding parts 400 are used to connect to the moving parts outside the linear actuator. The movement of the sliding parts 400 drives the movement of these moving parts. The driving part 2 can drive the transmission part 300 to move in order to drive the sliding parts 400. Under the drive of the driving part 2 and the transmission of the transmission part 300, at least two sliding parts 400 have different sliding speeds. The different sliding speeds are determined by the transmission ratio between the corresponding transmission part 300 and the driving part 2, or by the lead of the lead screw. The sliding parts 400 with different sliding speeds can realize diverse functional customization to preset the motion trajectory of the moving parts.

[0056] Independent sliders 400 refer to two sliders 400 that are not directly connected, such as having no direct connection or transmission relationship with each other.

[0057] When the transmission component 300 is a lead screw, the sliding component 400 is a lead screw nut or has a lead screw nut, the arrangement direction of the lead screw is the length direction of the lead screw, and the sliding direction of the sliding component 400 is the sliding direction of the lead screw; when the transmission component 300 is a lead screw nut, the sliding component 400 is a lead screw or has a lead screw, the arrangement direction of the lead screw nut is the direction of the axis of the lead screw nut thread hole, and the sliding direction of the sliding component 400 is the direction of the axis of the lead screw nut thread hole.

[0058] The number of driving elements 2 is not fixed. Multiple driving elements 2 can be used to drive all transmission elements 300, or each transmission element 300 can be equipped with one driving element 2. In this case, the sliding element 400 can be made to have different sliding speeds by controlling the driving element 2 to drive the corresponding transmission element 300 at different driving speeds. Alternatively, two driving elements 2 can have the same driving speed and two transmission elements 300 can have different leads. However, for cost considerations, in this embodiment, all transmission elements 300 are driven simultaneously by a single driving element 2.

[0059] The sliding member 400 is threaded and sleeved on the corresponding transmission member 300. Each transmission member 300 is provided with a transmission gear 600. The driving member 2 has an output gear 5 that meshes with the transmission gear 600. The transmission ratio between the output gear 5 and each transmission gear 600 affects the sliding speed of the corresponding sliding member 400. The smaller the transmission ratio, the faster the screw rotates, and the faster the corresponding sliding member 400 slides. In this embodiment, the sliding speed of different sliding members 400 is achieved by the lead of the screw. The larger the lead of the screw, the faster the sliding speed of the corresponding sliding member 400 at the same rotation speed.

[0060] All transmission components 300 are arranged in parallel at intervals, optionally with longitudinal or transverse intervals, i.e., intervals along the height direction or along the left-right direction, or even intervals along the two circumferences of the drive component, or in an array arrangement; different transmission components 300 can also be arranged non-parallel, provided that different sliding components 400 do not interfere with each other; in this embodiment, different transmission components 300 are arranged with longitudinal intervals, such as... Figure 15 , 16 As shown, it is arranged in an alternating vertical pattern.

[0061] The guide seat 1 includes a hollow sleeve 7, a front fixed seat 8, and a rear fixed seat 9. The front fixed seat 8 and the rear fixed seat 9 are respectively disposed at the front and rear ends of the sleeve 7. The transmission component 300 is rotatably disposed on the front fixed seat 8 and the rear fixed seat 9 and located between them. At the same time, all transmission components 300 are located in the sleeve 7. The driving component 2 is disposed on the rear fixed seat 9. The rear fixed seat 9 has a slot to accommodate the aforementioned gear.

[0062] The sliding member 400 includes an inner member 41 and an outer member 42. The outer member 42 is disposed outside the sleeve 7 and connected to the inner member 41. The inner member 41 is located inside the sleeve 7 and is directly sleeved on the transmission member 300 and connected to the corresponding transmission member 300. The sleeve 7 has a clearance groove 71 on at least one surface. In this embodiment, clearance grooves 71 are provided on both opposite sides of the sleeve 7, specifically the upper and lower surfaces of the sleeve 7. The clearance grooves 71 enable the outer member 42 to connect to the inner member 41 located inside the sleeve 7.

[0063] The external component 42 includes a bushing, which is fitted over the sleeve 7 and slides in cooperation with the sleeve 7 to increase the overall stability of the sliding component 400 and prevent the sliding component 400 from being entirely supported by the transmission component 300, thereby preventing the sliding component 400 from experiencing increased wear or misalignment with the transmission component 300. The bushing includes a separate upper bushing 44 and a lower bushing 45 for easy installation. To reinforce the sliding component 400, the external component 42 also includes a fitting outside the upper bushing 44 and the lower bushing 45. The fitting restricts the upper bushing 44 and the lower bushing 45 outside the sleeve 7. The fitting includes a base plate 47 and a U-shaped pressing member 48. The pressing member 48 fits over the upper bushing 44 from top to bottom and extends downward to the lower bushing 45. The base plate 47 is located below the lower bushing 45 and is fixedly connected to the pressing member 48.

[0064] In this embodiment, there are two transmission components 300 and two sliding components 400. However, the number of sliding components 400 and transmission components 300 is not necessarily exactly the same. An internal component 41 is fitted onto all transmission components 300, but only connected to its corresponding transmission component 300 via a thread. The internal component 41 is fitted onto other transmission components 300 through a larger diameter hole on the internal component 41, called a clearance hole 49, with a diameter larger than that of the transmission component 300. When the number of transmission components is greater than two, and a sliding component is fitted onto more than two transmission components simultaneously, the number of clearance holes on the transmission components will also increase accordingly. Furthermore, correspondingly, in addition to at least one clearance hole 49, the sliding member 400 also has at least one transmission connection hole. The sliding member 400 is sleeved on at least two transmission members 300 through the transmission connection hole and the clearance hole 49, and is transmittedly connected to the corresponding transmission member 300 through the transmission connection hole. Based on the transmission member 300 being a lead screw, the transmission connection hole is a threaded hole. That is, in this embodiment, the built-in member 41 is sleeved on two transmission members 300 at the same time. One transmission member 300 is in the transmission connection hole of the built-in member 41 and is transmittedly connected to the built-in member 41, while the other transmission member 300 is in the clearance hole 49 of the built-in member 41.

[0065] Furthermore, this linear actuator is used in an actuation device, such as... Figure 5-9As shown in Figure 14, this actuation device can be used in a sofa. The actuation device includes the aforementioned linear actuator, which requires only two transmission components 300: a first transmission component 301 and a second transmission component 302. The first transmission component 301 is equipped with a first sliding component 401 and a first gear 61, while the second transmission component 302 is equipped with a second sliding component 402 and a second gear 62. The first gear 61 and the second gear 62 are the transmission gears 600. The first gear 61 rotates synchronously with the first transmission component 301, and the second gear 62 rotates synchronously with the second transmission component 302. A back connector 10 for mounting the backrest 17 is rotatably mounted on the first sliding component 401. Specifically, the bottom plate 47 of the first sliding component 401 is bent upwards at both ends to form vertical extension seats 12 located at both ends. The extension seats 12 and the back connector 10... The lower end is rotatably connected; a seat bracket for mounting the seat 18 is provided on the second sliding member 402, and the first sliding member 401 is located in front of the second sliding member 402. When the driving member 2 drives the first transmission member 301 and the second transmission member 302 to rotate, the first sliding member 401 and the second sliding member 402 slide in the front-back direction at different sliding speeds, so that the back connecting member 10 of the first sliding member 401 and the seat bracket on the second sliding member 402 both have front-back displacement, so as to realize the forward movement of the seat 18 and the forward movement of the backrest 17; a driven link 13 is also provided between the second sliding member 402 and the back connecting member 10. When there is a speed difference between the first sliding member 401 and the second sliding member 402, the driven link 13 will rotate relative to the back connecting member 10, and the driven link 13 has the function of limiting the movement trajectory of the back connecting member 10.

[0066] To achieve both anti-back-rubbing and zero-wall-adhesion placement effects simultaneously, the sliding speed ratio of the first sliding member 401 to the second sliding member 402 is approximately 2:1. Under this speed ratio, the displacement generated by the rearward rotation of the upper part of the backrest 17 is no greater than the displacement caused by the first sliding member 401 driving the backrest 17 to slide forward, thereby achieving the zero-wall-adhesion effect and allowing the seat to be placed against the wall without motion interference during state switching. In addition, it also prevents back-rubbing sensation when the backrest 17 rotates backward, increasing the comfort of use during state switching.

[0067] The upper end of the driven link 13 is rotatably connected to the upper part of the back connector 10. The second sliding member 402 is provided with an extension seat 14 and the extension seat 14 is fixed to the upper surface of the second sliding member 402. The extension seat 14 protrudes backward from the second sliding member 402. The lower end of the driven link 13 is rotatably connected to the rear end of the extension seat 14.

[0068] The seat support includes several rotating brackets 15 rotatably mounted on the second sliding member 402. The rotating brackets 15 rotate along their respective vertical axes, and the rotating brackets 15 on the left and right sides are symmetrically arranged. Each rotating bracket 15 has a rotating end and a free end. The rotating end of the rotating bracket 15 is rotatably mounted on the second sliding member 402, and the free end of the rotating bracket 15 is configured to connect to the seat portion 18. The rotating bracket 15 has a folded state and an unfolded state. In the folded state, the rotating brackets 15 are close to the guide seat 1. When switching from the folded state to the unfolded state, the rotating brackets 15 rotate to extend outwards. In this embodiment, there are two rotating brackets 15 on each side, namely a first rotating bracket 151 and a second rotating bracket 152. The first rotating bracket 151 is located in front of the second rotating bracket 152. Both rotating brackets 15 are tilted upwards, and the tilting height of the first rotating bracket 151 is greater than that of the second rotating bracket 152, so that the seat portion 18 presents a posture with the front higher than the back. In the folded state, the first rotating bracket 151 rotates forward to approach the guide seat 1, and the second rotating bracket 152 rotates backward to approach the guide seat 1.

[0069] In addition, the rotating bracket 15 is provided with a limiting part 153, which is located at the rotating end and abuts against the second sliding member 402 in the unfolded state; the limiting part 153 positions the rotating bracket 15 when it is switched to the unfolded state, so as to facilitate the unfolding of the rotating bracket 15.

[0070] The back connector 10 and the extension seat 12 are detachably connected. During transportation, the back connector 10 is separated from the extension seat 12, the driven link 13 is rotated close to the guide seat 1, and the back connector 10 is rotated to approximately horizontal.

[0071] The lower end of the guide seat 1 is detachably fitted with a horizontally arranged base 16. There are two bases 16, which are arranged back and forth at intervals. During transportation, the bases 16 can be removed and placed along the length of the guide seat 1 for minimal packaging. When in use, the bases 16 can be fixed to the guide seat 1 with screws.

[0072] like Figure 10-13 As shown, the actuation device is used in a seating fixture, which includes the aforementioned actuation device and a backrest 17 and a seat 18 that are detachably mounted to the actuation device. The seat 18 is mounted on the seat bracket, and the backrest 17 is mounted on the backrest connector 10. From packaging to installation, the installation process only requires connecting the base 16 to the guide seat 1, then fully unfolding the rotating bracket 15 and connecting the backrest connector 10 to the extension seat 12, and finally inserting the backrest 17 into the backrest connector 10 and mounting the seat 18 onto the rotating bracket 15 to complete the installation.

[0073] In this embodiment, the transmission component 300 is a lead screw, the sliding component 400 has a nut that is threadedly connected to the transmission component 300, and the driving component 2 drives the lead screw to rotate. This is a relatively common solution. In addition, there are other solutions that can be used as equivalent substitutes:

[0074] like Figure 17 As shown, the transmission component 300 is a lead screw, and the sliding component 400 has a nut 1000 threadedly connected to the transmission component 300. The driving component 2 drives the nut 1000 to rotate. In this case, when the driving component 2 drives the nut 1000 to rotate, the nut 1000 needs to rotate in coordination with the sliding component 400. When the nut 1000 rotates, the lead screw remains stationary, allowing the nut 1000 to move simultaneously on the lead screw, thereby achieving the sliding of the sliding component 400. The driving component 2 and the nut 1000 can be connected by gears or bevel gears.

[0075] like Figure 18 As shown, the transmission component 300 is a lead screw nut, and the sliding component 400 has a lead screw threadedly connected to the transmission component 300. The driving component 2 drives the lead screw to rotate. In this case, when the driving component 2 drives the lead screw to rotate, the lead screw nut remains stationary, the driving component 2 moves with the lead screw, and causes the sliding component 400 to slide. The two transmission components 300 (lead screw nuts) connected to the two sliding components 400 can be integrated simultaneously on a fixed but different base 2000. Similarly, if two threaded holes are machined simultaneously on the base 2000, they should also be considered as two different transmission components 300 integrated on the base 2000.

[0076] like Figure 19 , 20 As shown, the transmission component 300 is a lead screw nut, and the sliding component 400 has a lead screw threadedly connected to the transmission component 300. The driving component 2 drives the lead screw nut to rotate. In this case, when the driving component 2 drives the lead screw nut to rotate, the lead screw slides, causing the sliding component 400 to slide. Figure 19 and Figure 20 Schemes using two drive elements 2 and a single drive element 2 are shown respectively. Figure 20 In the middle, the driving component 2 can simultaneously engage and drive two screw nuts through a gear 3000.

Claims

1. A linear actuator, characterized in that: The device integrates two transmission components arranged in the same direction, each of which is connected to an independent sliding component, and the arrangement direction of the transmission component is the same as the sliding direction of its corresponding sliding component; it also includes a driving component, which is connected to the transmission component or the sliding component and configured to drive the two sliding components to move; and the two sliding components have different sliding speeds.

2. The linear actuator according to claim 1, characterized in that: All transmission components are driven simultaneously by a single drive component.

3. The linear actuator according to claim 2, characterized in that: The drive component has a different transmission ratio than the two transmission components.

4. The linear actuator according to claim 3, characterized in that: The driving component is located at the front or rear end of the transmission component. Each transmission component is equipped with a transmission gear. The driving component has an output gear that meshes with the transmission gear. The output gear is configured to have different transmission ratios with the two transmission gears.

5. The linear actuator according to claim 2, characterized in that: The transmission component is a lead screw, and the sliding component is threadedly connected to the transmission component. The two transmission components have different leads.

6. The linear actuator according to claim 1, characterized in that: Each transmission component is connected to a driving component, and each transmission component is driven by its corresponding driving component. The driving components are configured to drive the corresponding transmission components at different driving speeds, so that the sliding components have different sliding speeds.

7. The linear actuator according to claim 1, characterized in that: Each transmission component is connected to a driving component, and each transmission component is driven by its corresponding driving component. The transmission component is a lead screw, and the sliding component is threadedly connected to the transmission component. Each driving component has the same driving speed, and the two transmission components have different leads.

8. The linear actuator according to claim 1, characterized in that: Both transmission components are arranged in parallel to each other.

9. The linear actuator according to claim 1, characterized in that: The sliding component has a transmission connection hole, through which it is connected to the corresponding transmission component.

10. The linear actuator according to claim 9, characterized in that: At least one of the sliding members also has a clearance hole. The sliding member is fitted onto the two transmission members through the transmission connection hole and the clearance hole, and is connected to one of the transmission members through the transmission connection hole.

11. The linear actuator according to any one of claims 1, 8-10, characterized in that: The two transmission components are arranged in parallel, one above the other, and the two sliding components are simultaneously mounted on the two transmission components and connected to different transmission components respectively.

12. The linear actuator according to claim 1, characterized in that: It also includes a guide seat arranged in the front and rear directions. The guide seat includes a front fixed seat and a rear fixed seat. The transmission components are arranged between the front fixed seat and the rear fixed seat, and the driving components are set on the front fixed seat or the rear fixed seat.

13. The linear actuator according to claim 12, characterized in that: The guide seat also includes a hollow sleeve, which is disposed between the front fixed seat and the rear fixed seat; all transmission components are located in the sleeve; the sliding component includes an internal component and an external component, the external component is disposed outside the sleeve and connected to the internal component, the internal component is located in the sleeve, and the internal component is sleeved on the transmission component and connected to the corresponding transmission component for transmission.

14. The linear actuator according to claim 13, characterized in that: The external component includes a bushing, which is fitted over the sleeve and slides in fit with the sleeve.

15. The linear actuator according to claim 14, characterized in that: The bushing includes a separate upper bushing and a lower bushing, and the external component also includes a sleeve disposed outside the upper and lower bushings, the sleeve being configured to confine the upper and lower bushings to the outer surface of the sleeve.

16. The linear actuator according to claim 15, characterized in that: The kit includes a base plate and a U-shaped pressing member. The base plate is located below the lower bushing, and the pressing member is fitted over both the upper and lower bushings from top to bottom and is fixedly connected to the base plate.

17. The linear actuator according to claim 1, characterized in that: The transmission component is a lead screw, the sliding component has a nut that is threadedly connected to the transmission component, and the driving component is configured to drive the lead screw or the nut to rotate.

18. The linear actuator according to claim 1, characterized in that: The transmission component is a lead screw nut, the sliding component has a lead screw threadedly connected to the transmission component, and the driving component is configured to drive the lead screw or lead screw nut to rotate.

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