A foldable and adjustable lead screw structure

Abstract

The present invention discloses a foldable adjustable screw structure, which relates to the field of mechanical design technology, and specifically includes a fixed seat, a first flexible screw is fixedly installed on one side of the upper surface of the fixed seat, and a second flexible screw is fixedly installed on the other side of the upper surface of the fixed seat, and the first flexible screw and the second flexible screw have the same structure. The foldable adjustable screw structure, through the coordinated use of the fixed seat, the first flexible screw, the second flexible screw, and the movable module, when the movable module and the fixed seat do not limit the middle extension screw or the top screw, the middle extension screw and the top screw can be rotated and then folded, and can be used according to the actual use height to save space. The screw can be bent in the non-working area to save space, and a longer screw stroke can be provided. For the application environment of long-stroke screws, the manufacturing difficulty is reduced, and it is very suitable for some use scenarios with requirements for installation space.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical design, and in particular to a foldable and adjustable screw rod structure. Background Art

[0002] A lead screw pair, consisting of a screw and a nut, is the most precise and commonly used transmission device in mechanical transmission. However, the lead screw in the lead screw pair currently available on the market is a single, fixed length. This can affect the installation and use of other components in some special installation scenarios, and it can also take up a lot of space. Consequently, the current lead screw structure has certain limitations. To address this issue, we have developed a foldable, adjustable lead screw structure. Summary of the Invention

[0003] In response to the shortcomings of the existing technology, the present invention provides a foldable adjustable screw structure, which solves the problem raised in the above background technology that the screw on the screw pair currently on the market is a whole screw structure and its length cannot be changed. For some special installation scenarios, the screw with an invariable length will affect its own installation or the use of other components, and occupy a large space, thus resulting in certain limitations in the use of the current screw structure.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: a foldable adjustable screw rod structure, comprising a fixing seat, wherein one side of the upper surface of the fixing seat is fixedly mounted with a first flexible screw rod, and the other side of the upper surface of the fixing seat is fixedly mounted with a second flexible screw rod, the first flexible screw rod and the second flexible screw rod having the same structure, the second flexible screw rod and the first flexible screw rod are both composed of a bottom screw rod, a top screw rod and a plurality of middle extended screw rods. The bottom of the bottom screw rod is fixedly connected to the upper surface of the fixing seat, the top end of the bottom screw rod and the top end of the middle extended screw rod are both provided with a mounting groove, the top end of the bottom screw rod and the top end of the middle extended screw rod are both arc-shaped, the middle of the bottom end of the middle extended screw rod and the top screw rod are fixedly connected to a rotating disk, the two ends of the rotating disk are arc-shaped, the shapes of the bottom ends of the top screw rod and the middle extended screw rod are adapted to the shapes of the top ends of the middle extended screw rod and the bottom screw rod, and the rotating disk is movably mounted to the inner cavity of the mounting groove.

[0005] Preferably, a bolt is installed in the inner cavity of the mounting groove, and the bolt passes through the rotating disk and is rotatably connected to the rotating disk. A movable module is provided on the first flexible screw rod and the second flexible screw rod, and the movable module includes a worm, a worm wheel, a guide mechanism, a rotating disk, a movable frame, a worm drive head and a rotating rod.

[0006] Preferably, a rotating rod is rotatably mounted in the middle of the inner cavity of the moving frame, a worm is fixedly mounted on the surface of the rotating rod, one end of the rotating rod extends to the outside of the moving frame and is mounted with a worm drive head, and worm wheels are rotatably mounted on both sides of the inner cavity of the moving frame.

[0007] Preferably, the two worm wheels are respectively threadedly connected to the surfaces of the first flexible screw rod and the second flexible screw rod, and the two worm wheels are matched with the worm rods. Both sides of the upper surface of the movable frame are fixedly connected with guide mechanisms, and the two guide mechanisms are respectively located outside the first flexible screw rod and the second flexible screw rod.

[0008] Preferably, a top limiting plate is fixedly connected to the top of the top screw rod.

[0009] Preferably, the top screw rod is installed on the top of the middle extension screw rod, and the middle extension screw rod is installed on the top of the bottom screw rod. The diameter and thread specifications of the bottom screw rod, the middle extension screw rod and the top screw rod are the same, and the threads at the connection between the bottom screw rod, the middle extension screw rod and the top screw rod are adapted.

[0010] Preferably, a driving source is installed on one side of the movable frame, and the driving source is connected to the worm drive head.

[0011] Preferably, the threads of the inner cavities of the two worm wheels are respectively adapted to the threads on the surfaces of the first flexible lead screw and the second flexible lead screw, and the two worm wheels rise and fall synchronously.

[0012] The present invention provides a foldable adjustable screw rod structure, which has the following beneficial effects:

[0013] 1. The foldable adjustable screw rod structure is used in conjunction with the fixed seat, the first flexible screw rod, the second flexible screw rod and the movable module, and the bottom screw rod, the middle extended screw rod and the top screw rod are used to form the first flexible screw rod and the second flexible screw rod. Since the tops of the bottom screw rod and the middle extended screw rod are both provided with mounting grooves, and bolts are installed in the mounting grooves, the rotating disk is installed by the bolts, and the rotating disk is sleeved by the mounting grooves, and threads are also provided on both sides of the rotating disk and are adapted to the threads on the surfaces of the bottom screw rod and the middle extended screw rod. Therefore, when the movable module and the fixed seat do not limit the middle extended screw rod or the top screw rod, the middle extended screw rod and the top screw rod can be rotated and then folded. They can be used according to the actual use height, saving space. The screw rod can be bent in the non-working area to save space, and a longer screw rod stroke can be provided. For the application environment of the long-stroke screw rod, the manufacturing difficulty is reduced, and it is very suitable for some usage scenarios with requirements for installation space.

[0014] 2. The foldable adjustable screw structure utilizes the cooperation of the worm gear and the worm, and the worm gear drives the worm gear to rotate, thereby realizing the rising and falling of the movable module. Due to the self-locking property between the worm gear and the worm gear, the worm gear cannot drive the worm gear to rotate. Therefore, when the worm gear moves to the specified position, it will not move, which can provide more precise jacking. Using this application for jacking is more precise than hydraulic jacking and scissor jacking, and has better self-locking performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the front side of the present invention;

[0016] Figure 2 It is a schematic structural diagram of the present invention;

[0017] Figure 3 It is a schematic diagram of a cross-sectional structure viewed from above of the present invention;

[0018] Figure 4 It is a state structure schematic diagram of the present invention.

[0019] In the figure: 1. Fixed seat; 2. First flexible screw rod; 3. Second flexible screw rod; 4. Movable module; 5. Worm; 6. Worm wheel; 7. Guide mechanism; 8. Middle extension screw rod; 9. Bolt; 10. Mounting slot; 11. Rotating plate; 13. Top screw rod; 14. Bottom screw rod; 15. Top limit plate; 16. Moving frame; 17. Worm drive head; 18. Rotating rod; 19. Drive source. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0021] See also Figures 1 to 4The present invention provides a technical solution: a foldable adjustable screw structure, including a fixed base 1, a first flexible screw rod 2 is fixedly installed on one side of the upper surface of the fixed base 1, and a second flexible screw rod 3 is fixedly installed on the other side of the upper surface of the fixed base 1. The first flexible screw rod 2 and the second flexible screw rod 3 have the same structure. The second flexible screw rod 3 and the first flexible screw rod 2 are both composed of a bottom screw rod 14, a top screw rod 13 and a plurality of middle extended screw rods 8. The bottom of the bottom screw rod 14 is fixedly connected to the upper surface of the fixed base 1. The top of the bottom screw rod 14 and the top of the middle extended screw rod 8 are both provided with mounting grooves 10. The top of the bottom screw rod 14 and the top of the middle extended screw rod 8 are both arc-shaped. The middle of the bottom end of the middle extended screw rod 8 and the top screw rod 13 are fixedly connected with a rotating disk 11. Both ends of the rotating disk 11 are arc-shaped. The shape of the bottom end of the top screw rod 13 and the middle extended screw rod 8 is adapted to the shape of the top of the middle extended screw rod 8 and the bottom of the bottom screw rod 14. The rotating disk 11 is movably installed in the inner cavity of the mounting groove 10.

[0022] Among them, the inner cavity of the mounting groove 10 is installed with a bolt 9, the bolt 9 passes through the rotating disk 11 and is rotatably connected to the rotating disk 11, and a movable module 4 is provided on the first flexible screw rod 2 and the second flexible screw rod 3. The movable module 4 includes a worm 5, a worm wheel 6, a guide mechanism 7, a rotating disk 11, a movable frame 16, a worm drive head 17 and a rotating rod 18.

[0023] The rotating disk 11 is connected by bolts 9, and then multiple middle extension screw rods 8, bottom screw rods 14 and top screw rods 13 are combined to form the first flexible screw rod 2 and the second flexible screw rod 3, and the middle extension screw rod 8 and the top screw rod 13 can be rotated along the opening direction of the mounting groove 10. According to different height requirements, multiple middle extension screw rods 8 can be installed between the bottom screw rod 14 and the top screw rod 13. Since the threads on the middle extension screw rod 8, the bottom screw rod 14 and the top screw rod 13 are adapted, and the threads at the connection are also adapted, when the bottom screw rod 14, the middle extension screw rod 8 and the top screw rod 13 are in a vertical state, a vertical screw rod is formed, and the threads on it can make the worm gear 6 move upward, and through the coordinated use of the fixed seat 1, the first flexible screw rod 2, the second flexible screw rod 3 and the movable module 4, the bottom screw rod 14, the middle extension screw rod 8 and the top screw rod 13 are utilized. The upper screw rod 13 is composed of the first flexible screw rod 2 and the second flexible screw rod 3. Since the top of the bottom screw rod 14 and the middle extended screw rod 8 are provided with a mounting groove 10, and bolts 9 are installed in the mounting groove 10, the rotating disk 11 is installed by the bolts 9, and the rotating disk 11 is sleeved using the mounting groove 10. Threads are also provided on both sides of the rotating disk 11 and are adapted to the threads on the surface of the bottom screw rod 14 and the middle extended screw rod 8. Therefore, when the movable module 4 and the fixed seat 1 do not limit the middle extended screw rod 8 or the top screw rod 13, the middle extended screw rod 8 and the top screw rod 13 can be rotated and then folded. They can be used according to the actual use height to save space. The screw rod can be bent in the non-working area to save space, and a longer screw rod stroke can be provided. For the application environment of long-stroke screw rods, the manufacturing difficulty is reduced, and it is very suitable for some usage scenarios with requirements for installation space.

[0024] A rotating rod 18 is rotatably mounted in the middle of the inner cavity of the moving frame 16, a worm 5 is fixedly mounted on the surface of the rotating rod 18, one end of the rotating rod 18 extends to the outside of the moving frame 16 and is mounted with a worm drive head 17, and worm wheels 6 are rotatably mounted on both sides of the inner cavity of the moving frame 16.

[0025] Among them, two worm wheels 6 are respectively threadedly connected to the surfaces of the first flexible screw 2 and the second flexible screw 3, and the two worm wheels 6 are matched with the worm 5. Both sides of the upper surface of the movable frame 16 are fixedly connected with guide mechanisms 7, and the two guide mechanisms 7 are respectively located outside the first flexible screw 2 and the second flexible screw 3. By using the worm wheel 6 and the worm 5 together, the worm wheel 6 is driven to rotate by the worm 5, thereby realizing the rise and fall of the movable module 4. Due to the self-locking property between the worm 5 and the worm wheel 6, the worm wheel 6 cannot drive the worm 5 to rotate. Therefore, when the worm wheel 6 moves to the specified position, it will not move, which can provide more precise jacking. Using this application for jacking is more precise than hydraulic jacking and scissor jacking, and has better self-locking performance.

[0026] Among them, the top of the top screw rod 13 is fixedly connected with a top limit plate 15. The setting of the top limit plate 15 is to prevent the movable module 4 from being separated from the first flexible screw rod 2 and the second flexible screw rod 3, thereby improving the safety of the structure.

[0027] Among them, the top screw rod 13 is installed on the top of the middle extension screw rod 8, and the middle extension screw rod 8 is installed on the top of the bottom screw rod 14. The diameter and thread specifications of the bottom screw rod 14, the middle extension screw rod 8 and the top screw rod 13 are the same, and the threads at the connection between the bottom screw rod 14, the middle extension screw rod 8 and the top screw rod 13 are adapted.

[0028] A driving source 19 is installed on one side of the moving frame 16 , and the driving source 19 is connected to the worm drive head 17 .

[0029] Among them, the driving source 19 can be a motor or other driving device, which drives the worm drive head 17 to rotate through the driving source 19, and then drives the worm 5 to rotate, and uses the worm 5 to drive the worm wheel 6 to rotate synchronously, so that the worm wheel 6 can move up and down on the first flexible screw 2 and the second flexible screw 3.

[0030] The threads of the inner cavities of the two worm wheels 6 are respectively adapted to the threads on the surfaces of the first flexible lead screw 2 and the second flexible lead screw 3 , and the two worm wheels 6 rise and fall synchronously.

[0031] In summary, when using the foldable adjustable screw structure, first install the first flexible screw rod 2 and the second flexible screw rod 3 on the fixed seat 1, start the driving source 19 to drive the rotating rod 18 to rotate, and then drive the worm 5 to rotate, and use the worm 5 to drive the two worm wheels 6 to rotate synchronously. Since the worm wheel 6 is installed in the inner cavity of the movable frame 16, the worm wheel 6 rotates at this time. With the cooperation of the threads on the surfaces of the first flexible screw rod 2 and the second flexible screw rod 3, the worm wheel 6 will move up and down synchronously on the first flexible screw rod 2 and the second flexible screw rod 3, driving the movable frame 16 to move up and down. When the movable frame 16 moves up to the connection between the bottom screw rod 14 and the middle extension screw rod 8, the connection between one middle extension screw rod 8 and the other middle extension screw rod 8, and the connection between the middle extension screw rod 8 and the top screw rod 13, the guide mechanism 7 will push The upper middle extended screw rod 8 or the top screw rod 13 causes the middle extended screw rod 8 or the top screw rod 13 to rotate into a vertical state, and then continue to move upward, so that the entire first flexible screw rod 2 and the second flexible screw rod 3 can be changed into a vertical state. Since the first flexible screw rod 2 and the second flexible screw rod 3 do not have the same directional freedom at the same height, the first flexible screw rod 2 and the second flexible screw rod 3 cannot bend in the same direction at the same height at the same time. Under the limiting action of the movable module 4 and the fixed seat 1, the first flexible screw rod 2 and the second flexible screw rod 3 constrain each other. Because the degrees of freedom at the same height are different, a stable screw pair is formed. The first flexible screw rod 2 and the second flexible screw rod 3 that have not entered between the movable module 4 and the fixed seat 1 do not constitute a constraint condition, and each can be bent and folded according to the installation direction of its joint.

[0032] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense, and may refer to mechanical or electrical connections, internal communication between two components, or direct connection. "Up," "down," "left," and "right" are only used to indicate relative positional relationships. When the absolute positions of the objects being described change, the relative positional relationships may also change.

[0033] Secondly: The drawings of the embodiments disclosed in the present invention only involve structures related to the embodiments disclosed in the present invention. Other structures may refer to conventional designs. The same embodiment and different embodiments of the present invention may be combined with each other without conflict.

[0034] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A foldable and adjustable screw rod structure, comprising a fixing seat (1), characterized in that: A first flexible screw rod (2) is fixedly mounted on one side of the upper surface of the fixing seat (1), and a second flexible screw rod (3) is fixedly mounted on the other side of the upper surface of the fixing seat (1). The first flexible screw rod (2) and the second flexible screw rod (3) have the same structure. The second flexible screw rod (3) and the first flexible screw rod (2) are both composed of a bottom screw rod (14), a top screw rod (13) and a plurality of middle extension screw rods (8). The bottom of the bottom screw rod (14) is fixedly connected to the upper surface of the fixed seat (1), and the top of the bottom screw rod (14) and the top of the middle extension screw rod (8) are both provided with a mounting groove (10), and the top of the bottom screw rod (14) and the top of the middle extension screw rod (8) are both arc-shaped, and the middle of the bottom end of the middle extension screw rod (8) and the top screw rod (13) are both fixedly connected with a rotating disk (11), and both ends of the rotating disk (11) are arc-shaped, and the shapes of the bottom ends of the top screw rod (13) and the middle extension screw rod (8) are adapted to the shapes of the top ends of the middle extension screw rod (8) and the bottom screw rod (14), and the rotating disk (11) is movably mounted to the inner cavity of the mounting groove (10); A bolt (9) is installed in the inner cavity of the installation groove (10), and the bolt (9) passes through the rotating disk (11) and is rotatably connected to the rotating disk (11). A movable module (4) is provided on the first flexible screw (2) and the second flexible screw (3), and the movable module (4) includes a worm (5), a worm wheel (6), a guide mechanism (7), a rotating disk (11), a movable frame (16), a worm drive head (17) and a rotating rod (18); A rotating rod (18) is rotatably mounted in the middle of the inner cavity of the movable frame (16), a worm (5) is fixedly mounted on the surface of the rotating rod (18), one end of the rotating rod (18) extends to the outside of the movable frame (16) and is mounted with a worm drive head (17), and worm wheels (6) are rotatably mounted on both sides of the inner cavity of the movable frame (16); The two worm wheels (6) are respectively threadedly sleeved onto the surfaces of the first flexible screw rod (2) and the second flexible screw rod (3). The two worm wheels (6) are both matched with the worm rod (5). Both sides of the upper surface of the movable frame (16) are fixedly connected with a guide mechanism (7). The two guide mechanisms (7) are respectively located outside the first flexible screw rod (2) and the second flexible screw rod (3). The first flexible screw rod (2) and the second flexible screw rod (3) do not have the same directional freedom at the same height. Therefore, the first flexible screw rod (2) and the second flexible screw rod (3) cannot bend in the same direction at the same height. Under the limiting action of the movable module (4) and the fixed seat (1), the first flexible screw rod (2) and the second flexible screw rod (3) are mutually constrained.

2. The foldable adjustable screw structure according to claim 1, characterized in that: A top limiting plate (15) is fixedly connected to the top of the top screw rod (13).

3. The foldable and adjustable screw rod structure according to claim 1, characterized in that: The top screw rod (13) is mounted on the top of the middle extension screw rod (8), and the middle extension screw rod (8) is mounted on the top of the bottom screw rod (14). The bottom screw rod (14), the middle extension screw rod (8) and the top screw rod (13) have the same diameter and thread specifications, and the threads at the connection between the bottom screw rod (14), the middle extension screw rod (8) and the top screw rod (13) are adapted.

4. The foldable and adjustable screw rod structure according to claim 1, characterized in that: A driving source (19) is installed on one side of the moving frame (16), and the driving source (19) is connected to the worm drive head (17).

5. The foldable and adjustable screw rod structure according to claim 1, characterized in that: The threads of the inner cavities of the two worm wheels (6) are respectively adapted to the threads on the surfaces of the first flexible screw rod (2) and the second flexible screw rod (3), and the two worm wheels (6) rise and fall synchronously.

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