Lead screw connecting structure

Abstract

The utility model relates to a lead screw connecting structure which comprises a lead screw body, one end of the lead screw body is sequentially connected with a lead screw nut, a torsion spring assembly and a gear assembly in a threaded mode, the other end of the lead screw body is provided with a threaded hole, and the threaded hole can be connected with a large gasket nut in a threaded mode. The utility model has the beneficial effects of good reliability, convenience in mounting and dismounting, low cost and wide application range.

Description

TECHNICAL FIELD

[0001] The utility model relates to transmission mechanism technical field, concretely relates to a screw rod connecting structure. BACKGROUND

[0002] The prior art screw rod end connecting structure adopts anti-swing ring support fixing, the anti-swing ring may be loose due to factors such as abrasion and vibration in the long-term use process;The anti-swing ring fixing mode needs to carry out relatively complex installation operation, for example, the anti-swing ring is correctly installed between the screw rod end and the installation part, and the position of the anti-swing ring needs to be ensured to be accurate, which needs to spend more time and energy;The anti-swing ring usually needs to be customized according to the specific size and requirement of the screw rod, and the production and processing cost is higher;The anti-swing ring fixing mode has higher requirements for the size accuracy, surface flatness and the like of the installation part, otherwise, the installation effect and fixing performance of the anti-swing ring may be affected. SUMMARY

[0003] The utility model discloses a screw rod connecting structure with good reliability, convenient installation and disassembly, low cost and wide application range.

[0004] A screw rod connecting structure, comprising a screw rod body, one end of the screw rod body is sequentially threadedly connected with a screw rod nut, a torsional spring assembly and a gear assembly, the other end of the screw rod body is provided with a threaded hole, and the threaded hole can be threadedly connected with a large washer nut.

[0005] In the above scheme, the gear assembly is used to be connected with a driving device such as a motor to drive the screw rod body to rotate, so that the screw rod nut can move along the screw rod body, the torsional spring assembly plays a buffering role for the rotation of the screw rod body, and the stable operation of the screw rod nut is ensured, when installing, the other end of the screw rod body is connected with the large washer nut by penetrating the structure for installing the screw rod body and being threadedly connected with the threaded hole of the screw rod body, a large pre-tightening force can be generated by tightening the large washer nut, the end of the screw rod body is tightly connected with the installation part, the stability of the screw rod body in the rotating process is ensured, the installation is simple and convenient, the part cost is reduced, and the adaptability to the installation environment is stronger, as long as there is a suitable threaded hole, the screw rod body can be fixed.

[0006] Further, the large washer nut comprises an integrally formed threaded rod portion and a washer end face portion, and the diameter of the washer end face portion is greater than the diameter of the cross section of the screw rod body.

[0007] In the above scheme, the integrally formed large gasket nut has high strength, and in some cases with large load and harsh working environment, the large gasket nut can better ensure the fixing effect of the screw rod body. During installation, the threaded rod part passes through the external mounting structure and is threadedly connected with the threaded hole, so that the gasket end face is pressed against the outer surface of the mounting structure to realize the installation of the screw rod body. The diameter of the gasket end face is greater than the diameter of the cross section of the screw rod body to ensure that the screw rod body can be connected with the mounting structure through the large gasket nut.

[0008] Further, the screw rod nut is provided with a plurality of mounting holes on the peripheral side wall.

[0009] In the above scheme, the mounting holes on the peripheral side wall of the screw rod nut are used to facilitate the connection of the screw rod nut with the external structure that needs to be lifted.

[0010] Further, the torsional spring assembly comprises a torsional spring seat and a torsional spring piece, the torsional spring seat is threadedly connected with the screw rod body, and the torsional spring piece is sleeved on the torsional spring seat.

[0011] In the above scheme, when the screw rod body rotates, the torsional spring seat also rotates with the screw rod body. The rotation of the torsional spring seat causes the torsional spring piece to contract or stretch. When the screw rod body drives the screw rod nut to move away from the gear assembly, the torsional spring piece is slowly compressed, i.e. the torsional spring piece contracts, and the counterforce generated by the torsional spring piece causes the screw rod body to slowly move, thereby reducing the vibration and noise of the screw rod nut and prolonging the service life of the screw rod nut.

[0012] Further, the gear assembly comprises a gear box, a bearing, a first gear and a second gear installed in the gear box, the bearing is sleeved on the screw rod body, the first gear is connected with the end of the screw rod body through a fastener, the second gear is engagedly connected with the first gear, and the second gear is vertically installed in the gear box.

[0013] In the above scheme, the second gear is connected with an external driving member such as a motor, so that the second gear rotates, which drives the first gear to rotate, and in turn drives the screw rod body to rotate. The first gear is connected with the end of the screw rod body through a fastener, which can ensure the stable connection of the first gear with the screw rod body, thereby ensuring the stable rotation of the screw rod body. The bearing replaces sliding friction with rolling friction, which significantly reduces the friction coefficient of the screw rod body during movement, thereby improving the transmission efficiency and response speed.

[0014] Further, the gear box comprises a first seat body and a second seat body, the first seat body and the second seat body are respectively provided with symmetrical first, second and third limiting grooves, and the torsional spring piece, the bearing and the gear are respectively embedded in the first, second and third limiting grooves.

[0015] In the above scheme, the first limiting groove, the second limiting groove and the third limiting groove provide precise positioning for the torsion spring, the bearing and the gear, ensure the correct installation and alignment of the internal components of the gear box, thereby improving the transmission accuracy, and at the same time, the compact design of the gear box can be realized, the space occupation is reduced, and the integration into various mechanical equipment is facilitated.

[0016] Further, the first seat body and the second seat body are provided with symmetrical connecting holes, the second gear passes through the connecting holes, and the two ends of the second gear are rotatably connected with the first seat body and the second seat body through oil-free bushings.

[0017] In the above scheme, the oil-free bushing can realize stable rotation of the second gear on the first seat body and the second seat body, the oil-free bushing has self-lubricating property, and high-efficiency and stable mechanical movement can be realized without additional lubricating grease, thereby reducing the consumption and leakage of the lubricating grease and reducing the maintenance cost.

[0018] The screw rod connecting structure has the advantages of good reliability, convenient installation and disassembly, low cost, wide application range, etc. The gear assembly is used for connecting with a driving device such as a motor to drive the screw rod body to rotate, so that the screw rod nut can move along the screw rod body, the torsion spring assembly plays a buffering role in the rotation of the screw rod body, ensures the stability of the screw rod nut in operation, and the other end of the screw rod body is connected with the screw rod body through the large gasket nut in the process of installation. The screw rod body is connected with the installation part tightly, the stability of the screw rod body in the rotation process is ensured, the installation is simple and convenient, the part cost is reduced, and the adaptability to the installation environment is stronger. As long as there is a suitable threaded hole, the screw rod body can be fixed. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is an embodiment of the whole structure of the screw rod connecting structure.

[0020] Figure 2 It is an embodiment of the large gasket nut.

[0021] Figure 3 It is an embodiment of the structure of the torsion spring assembly and the gear assembly.

[0022] Figure 4 It is an embodiment of the structure of the first seat body.

[0023] Explanation of the accompanying drawings: 1. Screw body; 2. Screw nut; 3. Torsion spring assembly; 31. Torsion spring seat; 32. Torsion spring member; 4. Gear assembly; 41. Gear box; 411. First seat body; 42. Bearing; 43. First gear; 44. Second gear; 5. Large washer nut; 51. Threaded rod; 52. Gasket end surface; 6. First limiting groove; 7. Second limiting groove; 8. Third limiting groove; 9. Connecting hole; 10. Oil-free bushing. DETAILED DESCRIPTION

[0024] The following is a further detailed description of a screw rod connection structure of the present invention in conjunction with specific embodiments and drawings.

[0025] like Figure 1 As shown, in a preferred embodiment, a screw connection structure of the utility model includes a screw body 1, one end of the screw body 1 is threadedly connected to a screw nut 2, a torsion spring assembly 3 and a gear assembly 4 in sequence, and the other end of the screw body 1 is provided with a threaded hole, which can be threadedly connected to a large gasket nut 5. The gear assembly 4 is used to connect with a driving device such as a motor to drive the screw body 1 to rotate, so that the screw nut 2 can move along the screw body 1, and the torsion spring assembly 3 plays a buffering role for the rotation of the screw body 1, ensuring the stable operation of the screw nut 2. During installation, the other end of the screw body 1 passes through the large washer nut 5 through the structure for installing the screw body 1 and is threadedly connected to the threaded hole of the screw body 1. A large pre-tightening force can be generated by tightening the large washer nut 5, so that the end of the screw body 1 is tightly connected to the installation part, ensuring the stability of the screw body 1 during rotation, reducing the shaking and displacement of the end of the screw body 1, and ensuring the normal operation of the screw body 1; for various forces applied to the end of the screw body 1, such as axial force, radial force and torque, the coordinated fixation of the large washer nut 5 and the threaded hole can provide more stable support and resistance, especially in some cases where the load is large and the working environment is harsh, the threaded fixation can better ensure the fixing effect of the screw body 1, and avoid damage to the screw body 1 or affecting the normal operation of the equipment due to loose fixation.

[0026] The screw rod connection structure is simple and convenient to install. You only need to align the large washer nut 5 with the screw hole and tighten it, which greatly improves the installation efficiency. When the screw rod body 1 needs to be maintained, replaced or repaired, the screw rod body 1 fixed with threads is easier to disassemble. You only need to loosen the large washer nut 5 to remove the screw rod body 1 from the installation position. The anti-sway ring fixing method may require the use of special tools or more cumbersome operations to remove the screw rod body 1, which increases the difficulty and time cost of maintenance.

[0027] The large washer nut 5 is a common standard part with large production batch and relatively low cost. The use of the large washer nut 5 for fixation can reduce the cost of the parts fixed at the end of the screw rod. The installation process is simple due to the thread fixation, and special tools and complex operations are not required, so the labor and time costs can be saved during the installation process, further reducing the overall installation cost.

[0028] The large washer nut 5 fixed screw rod body 1 has stronger adaptability to the installation environment. As long as the screw rod body 1 has a suitable threaded hole, it can be fixed. Even if the size accuracy or surface flatness of the installation site deviates slightly, the fixing effect can be ensured by adjusting the tightening degree of the screw. In some devices, the screw rod body 1 may need to be connected or matched with other components. The large washer nut 5 can be more conveniently installed and fixed with other components, thereby improving the assembly efficiency and facilitating the overall design and assembly of the device.

[0029] As shown in Figure 2 some embodiments, the large washer nut 5 includes an integrally formed threaded rod portion 51 and a washer end face portion 52. The diameter of the washer end face portion 52 is greater than the diameter of the cross section of the screw rod body 1. The integrally formed large washer nut 5 has high strength and can better ensure the fixing effect of the screw rod body 1 in some cases with large loads and harsh working environments. During installation, the threaded rod portion 51 passes through the external installation structure and is threadedly connected with the threaded hole, so that the washer end face portion 52 is pressed against the outer surface of the installation structure to achieve the installation of the screw rod body 1. The diameter of the washer end face portion 52 is greater than the diameter of the cross section of the screw rod body 1 to ensure that the screw rod body 1 can be connected with the installation structure through the large washer nut 5.

[0030] As shown in Figure 1 some embodiments, a plurality of installation holes are provided on the peripheral sidewall of the screw rod nut 2. The installation holes on the peripheral sidewall of the screw rod nut 2 are used to facilitate the connection of the screw rod nut 2 with the external structure that needs to be lifted.

[0031] As shown in Figure 3 some embodiments, the torsional spring assembly 3 includes a torsional spring seat 31 and a torsional spring piece 32. The torsional spring seat 31 is threadedly connected with the screw rod body 1, and the torsional spring piece 32 is sleeved on the torsional spring seat 31. When the screw rod body 1 rotates, the torsional spring seat 31 also rotates with the screw rod body 1. The rotation of the torsional spring seat 31 causes the torsional spring piece 32 to contract or stretch. When the screw rod body 1 moves the screw rod nut 2 away from the gear assembly 4, the torsional spring piece 32 is slowly compressed, i.e., the torsional spring piece 32 contracts, and the counterforce generated by the torsional spring piece 32 causes the screw rod body 1 to slowly move the screw rod nut 2, thereby reducing the vibration and noise of the screw rod nut 2 and improving the service life of the screw rod nut 2.

[0032] As shown in Figure 3As shown in the drawings, in some embodiments, the gear assembly 4 comprises a gear box 41, and a bearing 42, a first gear 43 and a second gear 44 installed in the gear box 41, the bearing 42 is sleeved on the screw rod body 1, the first gear 43 is connected with the end of the screw rod body 1 through a fastener, the second gear 44 is engaged with the first gear 43, and the second gear 44 is vertically installed in the gear box 41. The second gear 44 is connected with a driving member outside the motor, so that the second gear 44 rotates, which can drive the first gear 43 to rotate, and then drive the screw rod body 1 to rotate, the first gear 43 is connected with the end of the screw rod body 1 through a fastener, which can ensure the stability of the connection between the first gear 43 and the screw rod body 1, thereby ensuring the stable rotation of the screw rod body 1, the bearing 42 replaces sliding friction with rolling friction, which significantly reduces the friction coefficient of the screw rod body 1 during movement, thereby improving the transmission efficiency and response speed.

[0033] As shown in the drawings, Figure 4 As shown in the drawings, in some embodiments, the gear box 41 comprises a first seat body 411 and a second seat body, the first seat body 411 and the second seat body are respectively provided with symmetrical first limiting grooves 6, second limiting grooves 7 and third limiting grooves 8, and the torsional spring member 32, the bearing 42 and the gear are respectively embedded in the first limiting grooves 6, the second limiting grooves 7 and the third limiting grooves 8. The first limiting grooves 6, the second limiting grooves 7 and the third limiting grooves 8 provide accurate positioning for the torsional spring member 32, the bearing 42 and the gear, ensure the correct installation and alignment of the internal components of the gear box 41, thereby improving the transmission accuracy, and also achieving the compact design of the gear box 41, reducing the space occupation, and facilitating integration into various mechanical equipment.

[0034] As shown in the drawings, Figure 1 and Figure 4 As shown in the drawings, in some embodiments, the first seat body 411 and the second seat body are provided with symmetrical connecting holes 9, the second gear 44 passes through the connecting holes 9, and the two ends of the second gear 44 are rotatably connected with the first seat body 411 and the second seat body through oil-free bushings 10. The oil-free bushing 10 can realize the stable rotation of the second gear 44 on the first seat body 411 and the second seat body, the oil-free bushing 10 has self-lubricating property, and high-efficiency and stable mechanical movement can be realized without additional lubricating oil, thereby reducing the consumption and leakage of the oil and the maintenance cost.

[0035] The utility model discloses a screw rod connecting structure working principle and process, through drilling process in the bottom processing of screw rod body 1 thread hole, when installing, first screw rod body 1 and screw nut 2 are connected with, like this need guarantee the good contact of the ball on screw nut 2 and the helical groove on screw rod body 1, then torsional spring assembly 3 and gear assembly 4 are connected with screw rod body 1, the thread hole of the other end of screw rod body 1 is aligned with the hole on the external mounting structure, and adopts big gasket nut 5 to lock screw rod body 1 on the external mounting structure.

[0036] In the description of the utility model, it is understood that the orientation or positional relationship indicated by terms such as ''upper'', ''lower'', ''front'', ''rear'', ''left'', ''right'', ''vertical'', ''horizontal'', ''top'', ''bottom'', ''inner'', ''outer'' and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0037] In addition, the terms ''first'' and ''second'' are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with ''first'' and ''second'' can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of ''a plurality of'' is two or more than two, unless otherwise specifically limited.

[0038] In the utility model, unless otherwise specifically defined and limited, the terms ''installation'', ''connection'', ''connection'', ''fixing'' and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0039] Although the description of the utility model is combined with the above specific embodiments, it is obvious that many substitutions, modifications and changes can be made according to the above content for persons skilled in the art. Therefore, all such substitutions, improvements and changes are included in the spirit and scope of the appended claims.

Claims

1. A lead screw connection structure characterized by, The screw rod body is threadedly connected with a screw rod nut, a torsion spring assembly and a gear assembly in sequence at one end, and is provided with a threaded hole at the other end, which can be threadedly connected with a large gasket nut.

2. The lead screw connection structure according to claim 1, wherein The large gasket nut comprises an integrally formed threaded rod portion and a gasket end face portion, and the diameter of the gasket end face portion is larger than that of the cross section of the screw rod body.

3. The lead screw connection structure according to claim 1, wherein A plurality of mounting holes are arranged on the peripheral sidewall of the screw rod nut.

4. The lead screw connection structure according to claim 1, wherein The torsion spring assembly comprises a torsion spring seat and a torsion spring piece, the torsion spring seat is threadedly connected with the screw rod body, and the torsion spring piece is sleeved on the torsion spring seat.

5. The lead screw connection structure according to claim 4, wherein The gear assembly comprises a gear box, a bearing, a first gear and a second gear which are arranged in the gear box, the bearing is sleeved on the screw rod body, the first gear is connected with the end of the screw rod body through a fastener, the second gear is meshingly connected with the first gear, and the second gear is vertically arranged in the gear box.

6. The lead screw connection structure according to claim 5, wherein The gear box comprises a first seat body and a second seat body, the first seat body and the second seat body are respectively provided with symmetrical first, second and third limiting grooves, and the torsion spring piece, the bearing and the gears are respectively embedded in the first, second and third limiting grooves.

7. The lead screw connection structure according to claim 6, wherein The first seat body and the second seat body are provided with symmetrical connecting holes, the second gear passes through the connecting holes, and the two ends of the second gear are rotatably connected with the first seat body and the second seat body through oilless bushings.

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