Multi-connecting-rod telescopic mechanism

Abstract

The utility model relates to the technical field of telescopic devices, in particular to a multi-connecting-rod telescopic mechanism which comprises a driving motor (10), a transmission lead screw (20), a first main connecting rod (30), a second main connecting rod (40), a first upper connecting rod (50), a second upper connecting rod (60), a first lower connecting rod (70) and a second lower connecting rod (80). The end, away from the driving motor (10), of the transmission lead screw (20) is hinged to rod bodies of the first main connecting rod (40) and the second main connecting rod (50) through a rotating support. During contraction, the first upper connecting rod, the second upper connecting rod, the first lower connecting rod and the second lower connecting rod are contracted on the two sides of the first main connecting rod and the second main connecting rod, the occupied space is small, and the telescopic use requirement in certain limited space can be met.

Description

Technical Field

[0001] This utility model relates to the field of telescopic device technology, and in particular to a multi-link telescopic mechanism. Background Technology

[0002] Chinese utility model patent CN212744571U discloses a multi-link telescopic device, including a cylinder providing a power source for the telescopic device; a connecting block a, fixed to the cylinder by bolts; a cylinder connecting block fixedly connected to the connecting block a by a pin, and a base on the cylinder connecting block; a threaded hole connecting block threadedly connected to the telescopic rod of the cylinder; two upper parallel connecting blocks and two lower parallel connecting blocks at both ends of the base, and a connecting block b at the other end of the upper and lower parallel connecting blocks, forming a parallelogram movable structure; a movable connecting block connecting the threaded hole connecting block and the parallelogram movable structure; and a front end block on the connecting block b, which is matched according to a sensing model or a buffer block. This multi-link telescopic device adopts a parallelogram movable structure, which occupies a large space in both moving and stationary states, and cannot meet the telescopic needs of certain limited spaces.

[0003] Therefore, existing technologies need to be improved and enhanced. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a multi-link telescopic mechanism that occupies less space and can meet the telescopic needs of certain limited spaces.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A multi-link telescopic mechanism includes a drive motor, a transmission screw, a first main link, a second main link, a first upper link, a second upper link, a first lower link, and a second lower link. The drive motor drives the transmission screw to rotate, and the end of the transmission screw away from the drive motor is hinged to the body of the first main link and the second main link through a rotating bracket.

[0007] The first hinge end of the first main connecting rod is hinged to the first hinge end of the first lower connecting rod, and the second hinge end of the first main connecting rod is hinged to the first hinge end of the second upper connecting rod.

[0008] The first hinge end of the second main connecting rod is hinged to the first hinge end of the second lower connecting rod, and the second hinge end of the second main connecting rod is hinged to the first hinge end of the first upper connecting rod.

[0009] The second hinge end of the first upper connecting rod is hinged to the second hinge end of the second upper connecting rod, and the second hinge end of the first lower connecting rod is hinged to the second hinge end of the second lower connecting rod.

[0010] As a further embodiment of this utility model, a spherical bearing is provided on the output shaft of the drive motor, the spherical bearing is connected to the transmission lead screw, and a nut is provided on the outside of the transmission lead screw to cooperate with it.

[0011] As a further embodiment of this utility model, the body of the first main connecting rod and the body of the second main connecting rod are connected together by a main hinge shaft.

[0012] As a further embodiment of this utility model, the distance between the main hinge shaft and the first hinge end of the first main connecting rod is greater than the distance between the main hinge shaft and the second hinge end of the first main connecting rod, and the distance between the main hinge shaft and the second hinge end of the second main connecting rod is greater than the distance between the main hinge shaft and the first hinge end of the second main connecting rod.

[0013] As a further embodiment of this utility model, the second hinge end of the first upper connecting rod is hinged to the second hinge end of the second upper connecting rod through an upper hinge shaft, and the second hinge end of the first lower connecting rod is hinged to the second hinge end of the second lower connecting rod through a lower hinge shaft.

[0014] As a further embodiment of this utility model, the upper hinge shaft is disposed on an upper fixed block, the upper fixed block having three mounting feet, and the mounting feet having mounting holes.

[0015] As a further embodiment of this utility model, both the first upper connecting rod and the second upper connecting rod are provided with a protrusion.

[0016] As a further embodiment of this utility model, both the first lower connecting rod and the second lower connecting rod are provided with a through hole along the length direction.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] Due to the above structural design, namely, the drive motor drives the transmission screw to rotate, and the transmission screw is hinged to the body of the first main connecting rod and the second main connecting rod through the rotating bracket; the first main connecting rod is hinged to the second upper connecting rod and the first lower connecting rod, and the second main connecting rod is hinged to the first upper connecting rod and the second lower connecting rod. When retracted, the first upper connecting rod and the second upper connecting rod, as well as the first lower connecting rod and the second lower connecting rod, retract to the sides of the first main connecting rod and the second main connecting rod, occupying less space and meeting the retractable use needs of certain limited spaces. Attached Figure Description

[0019] Appendix Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0020] Appendix Figure 2 This is a schematic diagram of the structure of the first main connecting rod in an embodiment of the present invention;

[0021] Appendix Figure 3 This is a schematic diagram of the structure of the second main connecting rod in an embodiment of the present invention;

[0022] Appendix Figure 4 This is a schematic diagram of the structure of the first lower connecting rod in an embodiment of the present invention;

[0023] Appendix Figure 5 This is a schematic diagram of the structure of the second lower connecting rod in an embodiment of the present invention;

[0024] Appendix Figure 6 This is a schematic diagram of the structure of the first upper connecting rod in an embodiment of the present invention;

[0025] Appendix Figure 7 This is a schematic diagram of the structure of the second upper connecting rod in an embodiment of the present invention;

[0026] Appendix Figure 8 This is a schematic diagram of the positioning block in an embodiment of the present invention.

[0027] The labels in the diagram are as follows:

[0028] 10-Drive motor, 20-Transmission screw, 30-First main connecting rod, 40-Second main connecting rod, 50-First upper connecting rod, 60-Second upper connecting rod, 70-First lower connecting rod, 80-Second lower connecting rod, 90-Upper fixing block;

[0029] 11-Spherical plain bearing;

[0030] 21-Nut;

[0031] 31-Main hinge shaft;

[0032] 51 - Upper hinge shaft, 52 - Convex hull;

[0033] 71 - Lower hinge shaft, 73 - Through hole;

[0034] 91 - Mounting foot, 92 - Mounting hole. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model; that is, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The components of the embodiments of the present utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0037] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0038] The features and performance of this utility model will be further described in detail below with reference to the embodiments. Example

[0039] like Figure 1-8 As shown, this application discloses a multi-link telescopic mechanism, including a drive motor 10, a transmission screw 20, a first main connecting rod 30, a second main connecting rod 40, a first upper connecting rod 50, a second upper connecting rod 60, a first lower connecting rod 70, and a second lower connecting rod 80. The drive motor 10 drives the transmission screw 20 to rotate, and one end of the transmission screw 20 away from the drive motor 10 is hinged to the rod body of the first main connecting rod 30 and the second main connecting rod 40 through a rotating bracket.

[0040] The first hinge end of the first main connecting rod 30 is hinged to the first hinge end of the first lower connecting rod 70, and the second hinge end of the first main connecting rod 30 is hinged to the first hinge end of the second upper connecting rod 60; the first hinge end of the second main connecting rod 40 is hinged to the first hinge end of the second lower connecting rod 80, and the second hinge end of the second main connecting rod 40 is hinged to the first hinge end of the first upper connecting rod 50; the second hinge end of the first upper connecting rod 50 is hinged to the second hinge end of the second upper connecting rod 60, and the second hinge end of the first lower connecting rod 70 is hinged to the second hinge end of the second lower connecting rod 80. Through the above structural design, during operation, the drive motor drives the transmission screw to rotate, and the transmission screw drives the hinge end of the first main connecting rod and the first hinge end of the second main connecting rod to move towards each other, thereby causing the first upper connecting rod and the second upper connecting rod, the first lower connecting rod and the second lower connecting rod to move towards each other, thus achieving structural elongation; the drive motor drives the transmission screw to rotate in the opposite direction, thereby achieving structural contraction. When the present application is in the contracted state, the first upper connecting rod and the second upper connecting rod, as well as the first lower connecting rod and the second lower connecting rod, are contracted to the sides of the first main connecting rod and the second main connecting rod, occupying less space and meeting the needs of telescopic use in certain limited spaces.

[0041] Specifically, a spherical bearing 11 is provided on the output shaft of the drive motor 10, the spherical bearing 11 is connected to the transmission screw 20, and a nut 21 is provided on the transmission screw 20 to cooperate with it.

[0042] Specifically, the body of the first main connecting rod 30 and the body of the second main connecting rod 40 are connected together by the main hinge shaft 31.

[0043] In this embodiment, since the lengths of the first upper link and the second upper link are less than the lengths of the first lower link and the second lower link, the distance between the main hinge shaft 31 and the first hinge end of the first main link 30 is greater than the distance between the main hinge shaft 31 and the second hinge end of the second main link 40, and the distance between the main hinge shaft 31 and the second hinge end of the second main link 40 is greater than the distance between the main hinge shaft 31 and the first hinge end of the second main link 40.

[0044] Specifically, the second hinge end of the first upper connecting rod 50 is hinged to the second hinge end of the second upper connecting rod 60 through an upper hinge shaft 51, and the second hinge end of the first lower connecting rod 70 is hinged to the second hinge end of the second lower connecting rod 80 through a lower hinge shaft 71.

[0045] Specifically, the upper hinge shaft 51 is mounted on an upper fixed block 90. ​​The upper fixed block 90 has three mounting feet 91, and each mounting foot 91 has a mounting hole 92. Through the limiting effect of the upper fixed block, the transmission screw moves away from the upper fixed block under the action of the drive motor, thus achieving the extension of this application.

[0046] Specifically, both the first upper connecting rod 50 and the second upper connecting rod 60 are provided with a protrusion 52. The protrusion of the first upper connecting rod and the second upper connecting rod can increase their cross-sectional modulus, thereby improving their ability to resist bending and torsion.

[0047] Specifically, both the first lower connecting rod 70 and the second lower connecting rod 80 are provided with a through hole 72 along the length direction. By providing through holes on the first and second lower connecting rods, the overall mass of the connecting rods can be effectively reduced without significantly affecting their structural strength.

[0048] In summary, this utility model, through the above-described structural design, overcomes the shortcomings of the prior art and features a reasonable structure, small footprint, and suitability for limited spaces.

[0049] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. The patent protection scope of the present utility model shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present utility model shall also be included within the protection scope of the present utility model.

Claims

1. A multi-link telescoping mechanism, characterized by: The utility model relates to a kind of linkage mechanism, including a drive motor (10), a transmission screw rod (20), a first main connecting rod (30), a second main connecting rod (40), a first upper connecting rod (50), a second upper connecting rod (60), a first lower connecting rod (70) and a second lower connecting rod (80), the drive motor (10) drives the transmission screw rod (20) rotation, the transmission screw rod (20) is away from the end of the drive motor (10) by rotating support and the first main connecting rod (30) and the second main connecting rod (40) with the body of rod articulates; The first articulation end of the first main connecting rod (30) is articulated with the first articulation end of the first lower connecting rod (70), and the second articulation end of the first main connecting rod (30) is articulated with the first articulation end of the second upper connecting rod (60). The first articulation end of the second main connecting rod (40) is articulated with the first articulation end of the second lower connecting rod (80), and the second articulation end of the second main connecting rod (40) is articulated with the first articulation end of the first upper connecting rod (50). The second articulation end of the first upper connecting rod (50) is articulated with the second articulation end of the second upper connecting rod (60), and the second articulation end of the first lower connecting rod (70) is articulated with the second articulation end of the second lower connecting rod (80).

2. The multi-link expansion mechanism of claim 1, wherein: The output shaft of the drive motor (10) is provided with a knuckle joint bearing (11), the knuckle joint bearing (11) is connected with the transmission screw rod (20), and the transmission screw rod (20) is provided with a nut (21) matched therewith.

3. The multi-link expansion mechanism of claim 2, wherein: The body of the first main connecting rod (30) is connected with the body of the second main connecting rod (40) through a main articulation shaft (31).

4. The multi-link expansion mechanism of claim 3, wherein: The distance between the main articulation shaft (31) and the first articulation end of the first main connecting rod (30) is greater than the distance between the main articulation shaft (31) and the second articulation end of the first main connecting rod (30), and the distance between the main articulation shaft (31) and the second articulation end of the second main connecting rod (40) is greater than the distance between the main articulation shaft (31) and the first articulation end of the second main connecting rod (40).

5. The multi-link expansion mechanism of claim 4, wherein: The second articulation end of the first upper connecting rod (50) is articulated with the second articulation end of the second upper connecting rod (60) through an upper articulation shaft (51), and the second articulation end of the first lower connecting rod (70) is articulated with the second articulation end of the second lower connecting rod (80) through a lower articulation shaft (71).

6. The multi-link expansion mechanism of claim 5, wherein: The upper articulation shaft (51) is arranged on an upper fixed block (90), and the upper fixed block (90) has three mounting feet (91), and mounting holes (92) are arranged on the mounting feet (91).

7. The multi-link telescoping mechanism of claim 6, wherein: The first upper connecting rod (50) and the second upper connecting rod (60) are each provided with a convex hull (52).

8. The multi-link telescoping mechanism of claim 7, wherein: The first lower connecting rod (70) and the second lower connecting rod (80) are each provided with a through hole (72) in the length direction.

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