Compact spring nail driving connecting rod

Abstract

The utility model provides a compact spring nail driving connecting rod, which solves the problems of connecting rod movement track control and the like, and comprises a main rod body, a bending part arranged in the middle of the main rod body, connecting holes respectively arranged at two ends of the main rod body, mounting holes arranged on the main rod body at equal intervals, and extension components arranged between the mounting holes and the main rod body, a reinforcing assembly is arranged between the bent part and the end of the main rod body, and the bent part is provided with a rotary supporting assembly. The movable limiting device has the advantages of stable structure, good movable limiting effect and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of driving connecting rods, and particularly relates to a compact spring nail driving connecting rod. Background Art

[0002] A connecting rod, also known as a connecting rod arm, is a rigid rod that connects components in a rotating shaft manner at its end points. A driving connecting rod is a mechanism that connects components to each other by means of hinges and slides to achieve motion transformation and power transmission. A large number of connecting rods are used in the existing internal driving structure of an electric sofa. In order to ensure the flexibility of the movement of its movable joints, its swing arm is usually fixed with elastic nails. However, in the actual use process, the existing driving connecting rod has poor expansibility, and its movement trajectory cannot be restricted when the connecting rod specifications are adjusted.

[0003] In order to solve the deficiencies of the existing technology, people have carried out long-term explorations and proposed various solutions. For example, a Chinese patent document discloses a mimicry cradle sofa base device [201510928789.1], which includes a sixth connecting rod, a seventh connecting rod, and an eighth connecting rod; one end of each of the sixth connecting rod and the seventh connecting rod is hinged to the second connecting rod; the eighth connecting rod is an L-shaped rod, one end of which is fixedly connected to the extension part of the square tube, so that the eighth connecting rod is driven by the rotation of the square tube, and the other end is hinged to the other end of the seventh connecting rod; the other end of the sixth connecting rod is hinged to the extension part of the square tube; the swing assembly includes a swing part with an arc-shaped contact surface and arranged on the base; the swing reset assembly is used to reset the swing part and assist the swing part to swing; the telescopic bracket is fixed on the swing part.

[0004] The above solution solves the problem of the compactness of the connecting rod structure to a certain extent, but there are still many deficiencies in this solution, such as the problem of being unable to effectively restrict the movement trajectory. Summary of the Invention

[0005] The purpose of the utility model is to provide a compact spring nail driving connecting rod with reasonable design and capable of effectively restricting the movement trajectory in view of the above problems.

[0006] To achieve the above purpose, the utility model adopts the following technical scheme: A compact spring nail driving connecting rod includes a main rod body, a bending part is arranged in the middle of the main rod body, connecting holes are respectively opened at both ends of the main rod body, equidistantly arranged mounting holes are opened on the main rod body, an extension assembly is arranged between the mounting holes and the main rod body, a strengthening assembly is arranged between the bending part and the end of the main rod body, and a rotating support assembly is arranged on the bending part.

[0007] In the above-mentioned compact spring nail driving connecting rod, the rotating support assembly includes a support cylinder welded and fixed to the main rod body. A rotating hole located inside the support cylinder is formed in the bent portion, and support ribs arranged in central symmetry are provided inside the support cylinder.

[0008] In the above-mentioned compact spring nail driving connecting rod, the extension assembly includes extension grooves provided on both sides of the main rod body. The extension grooves correspond to the mounting holes one by one, and the extension grooves where adjacent mounting holes are located are arranged in opposite directions. The extension grooves are inclined relative to the axial extension direction of the main rod body.

[0009] In the above-mentioned compact spring nail driving connecting rod, the strengthening assembly includes strengthening ribs provided at the edge of the main rod body. The cross-section at the junction of the strengthening rib and the main rod body is in a T shape or a Y shape, and the width of the strengthening rib gradually decreases from one end close to the bent portion to the end close to the end of the main rod body.

[0010] In the above-mentioned compact spring nail driving connecting rod, a thickened portion is provided at the end of the main rod body. The thickened portion is in a circular ring shape and surrounds the connection hole circumferentially. A cavity is left between the thickened portion and the end of the main rod body.

[0011] In the above-mentioned compact spring nail driving connecting rod, the surface of the main rod body is coated with a corrosion-resistant layer, and the connection hole is chrome-plated.

[0012] In the above-mentioned compact spring nail driving connecting rod, a limiting groove extending to the edge is formed on the main rod body. The limiting groove is inclined relative to the extension direction of the main rod body.

[0013] In the above-mentioned compact spring nail driving connecting rod, a sub-connecting rod is connected to the mounting hole of the main rod body through a rotating joint.

[0014] In the above-mentioned compact spring nail driving connecting rod, the sub-connecting rod is arc-shaped and a flipping groove for the end of the main rod body to insert and rotate is formed at the end.

[0015] In the above-mentioned compact spring nail driving connecting rod, a rotational damping is provided between the rotating joint and the main rod body as well as the sub-connecting rod.

[0016] Compared with the existing technology, the advantages of the present utility model are as follows: mounting holes are arranged on the main rod body and expanded by the extension assembly, so as to flexibly adjust the overall movement track of the driving connecting rod; the rotating support assembly performs local strengthening treatment on the bent portion, and when fixing parts such as spring nails are assembled, the rotating support assembly performs secondary support and strengthening on the fixing parts; the main rod body is connected with a sub-connecting rod, and a rotational damping and a thickened portion are provided at the rotating connection to ensure its rotational stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the present utility model;

[0018] Figure 2 is a schematic structural view of another perspective of the present utility model;

[0019] Figure 3 is a linkage schematic diagram of the present utility model;

[0020] Figure 4 is a partial cross-sectional view of the present utility model;

[0021] In the figure, there are main rod body 1, thickened part 11, limit groove 12, bending part 2, connection hole 3, mounting hole 4, extension assembly 5, extension groove 51, strengthening assembly 6, strengthening rib 61, rotating support assembly 7, support cylinder 71, rotating hole 72, support rib 73, rotating joint 8, secondary connecting rod 9, and flipping groove 91. Specific Embodiment

[0022] The present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] As Figures 1-4 shown, a compact spring nail-driven connecting rod includes a main rod body 1 with a bending structure. A bending part 2 is provided in the middle of the main rod body 1, and the included angle of the bending part 2 is an obtuse angle; connection holes 3 are respectively opened at both ends of the main rod body 1 for connection and transfer with other connecting rods. In order to further improve the expandability of the connecting rod, equidistantly arranged mounting holes 4 are opened on the main rod body 1, and the mounting holes 4 are externally connected through connecting pieces such as threaded parts. An extension assembly 5 is arranged between the mounting hole 4 and the main rod body 1, a strengthening assembly 6 is arranged between the bending part 2 and the end of the main rod body 1, and a rotating support assembly 7 is arranged on the bending part 2. The strengthening assembly 6 and the strengthening assembly 6 improve the local structural strength of the main rod body 1 and ensure the structural stability during the linkage process.

[0024] Specifically, different from the conventional rotating shaft structure, in this embodiment, spring nails are used for rotational support and fixation. The rotating support assembly 7 includes a support cylinder 71 welded and fixed to the main rod body 1. A rotating hole 72 located inside the support cylinder 71 is opened on the bending part 2, and symmetrically arranged support ribs 73 are arranged inside the support cylinder 71. When the spring nail is inserted into the support cylinder 71, its outside presses against the support ribs 73 inside the support cylinder 71.

[0025] Furthermore, the extension assembly 5 is engaged with an external rod and locked by a threaded part, including extension grooves 51 arranged on both sides of the main rod body 1. The extension grooves 51 correspond to the mounting holes 4 one by one, and the extension grooves 51 where adjacent mounting holes 4 are located are arranged in opposite directions. The extension grooves 51 are inclined relative to the axial extension direction of the main rod body 1. An external extension bar is engaged in the extension grooves 51, and the staggered arrangement of the extension grooves 51 does not affect the overall structural strength of the main rod body 1.

[0026] Furthermore, different from the existing reinforcement structures, the reinforcement component 6 in this embodiment includes a reinforcing rib 61 disposed at the edge of the main rod body 1. The cross-section at the junction of the reinforcing rib 61 and the main rod body 1 is T-shaped or Y-shaped, and the width of the reinforcing rib 61 gradually decreases from the end near the bending portion 2 towards the end near the head of the main rod body 1. The edge reinforcement treatment of the main rod body 1 ensures the overall torsional resistance.

[0027] Furthermore, since torque transmission is carried out at the head of the main rod body 1, local thickening treatment is performed. A thickening portion 11 is provided at the head of the main rod body 1. The thickening portion 11 is annular and circumferentially surrounds the connection hole 3. A cavity is left between the thickening portion 11 and the head of the main rod body 1. The connecting shaft passes through the thickening portion 11 and the mounting hole 4, thereby ensuring the stability of its central axis.

[0028] In addition, the surface of the main rod body 1 is coated with a corrosion-resistant layer, and the connection hole 3 is chromium-plated. The overall outer surface of the main rod body 1 is protected, extending the service life of the drive link. The main rod body 1 can be made of aluminum alloy or stainless steel to balance structural strength and corrosion resistance.

[0029] At the same time, a limiting groove 12 extending to the edge is formed on the main rod body 1. The limiting groove 12 is inclined relative to the extending direction of the main rod body 1. The external rod is slidably inserted into the limiting groove 12 to limit the movement range when the main rod body 1 swings.

[0030] Visibly, similar to the existing link structure, the mounting hole 4 of the main rod body 1 in this embodiment is connected with a sub-link 9 through a rotating joint 8. The rotating joint 8 is connected with a rotating shaft inserted into the mounting hole 4, and the rotating joint 8 plays a lubricating role when the sub-link 9 swings.

[0031] Obviously, the sub-link 9 is arc-shaped and a turning groove 91 for the head of the main rod body 1 to insert and rotate is formed at the head. The turning groove 91 fits and presses against the head of the main rod body 1, and corresponding limiting structures can be provided inside the turning groove 91 to limit the swinging angle of the sub-link 9.

[0032] Preferably, a rotational damping is provided between the rotating joint 8 and the main rod body 1 and the sub-link 9 to adapt to low-speed swinging.

[0033] In summary, the principle of this embodiment is as follows: The bending portion 2 of the main rod body 1 is rotationally installed and fixed by a spring nail, the rotating support component 7 improves the structural strength at its rotating part, and the mounting hole 4 on the main rod body 1 is externally assembled and expanded through the extension component 5.

[0034] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the technical field to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar methods to replace them, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0035] Although the terms such as main rod body 1, thickened portion 11, limiting groove 12, bending portion 2, connecting hole 3, mounting hole 4, extension assembly 5, extension groove 51, strengthening assembly 6, strengthening rib 61, rotating support assembly 7, support cylinder 71, rotating hole 72, support rib 73, rotating joint 8, secondary connecting rod 9, flipping groove 91, etc. are used more frequently in this text, the possibility of using other terms is not excluded. These terms are only used to more conveniently describe and explain the essence of the present utility model; interpreting them as any additional limitation is contrary to the spirit of the present utility model.

Claims

1. A compact spring nail driving link, comprising a main rod body (1), a bending part (2) is arranged in the middle of the main rod body (1), and connecting holes (3) are respectively opened at both ends of the main rod body (1), characterized in that, The main rod body (1) is provided with equidistantly arranged mounting holes (4). An extension component (5) is arranged between the mounting holes (4) and the main rod body (1). A strengthening component (6) is arranged between the bending part (2) and the end of the main rod body (1). A rotating support component (7) is arranged on the bending part (2).

2. A compact spring nail driving connecting rod according to claim 1, characterized in that, The rotating support component (7) includes a support cylinder (71) welded and fixed to the main rod body (1). A rotating hole (72) located inside the support cylinder (71) is opened on the bending part (2). Support ribs (73) arranged in central symmetry are provided on the inner side of the support cylinder (71).

3. A compact spring nail driving connecting rod according to claim 1, characterized in that, The extension component (5) includes extension grooves (51) arranged on both sides of the main rod body (1). The extension grooves (51) correspond to the mounting holes (4) one by one. The extension grooves (51) where adjacent mounting holes (4) are located are arranged in opposite directions. The extension grooves (51) are inclined relative to the axial extension direction of the main rod body (1).

4. A compact spring nail driving connecting rod according to claim 1, characterized in that, The strengthening component (6) includes strengthening ribs (61) arranged at the edge of the main rod body (1). The cross-section at the junction of the strengthening ribs (61) and the main rod body (1) is T-shaped or Y-shaped. The width of the strengthening ribs (61) gradually decreases from the end close to the bending part (2) towards the end close to the end of the main rod body (1).

5. A compact spring nail driving connecting rod according to claim 1, characterized in that, A thickening part (11) is arranged at the end of the main rod body (1). The thickening part (11) is annular and surrounds the connection hole (3) circumferentially. A cavity is left between the thickening part (11) and the end of the main rod body (1).

6. A compact spring nail driving connecting rod according to claim 1, characterized in that, The surface of the main rod body (1) is coated with a corrosion-resistant layer. Chrome plating treatment is carried out at the connection hole (3).

7. A compact spring nail driving connecting rod according to claim 1, characterized in that, A limiting groove (12) extending to the edge is opened on the main rod body (1). The limiting groove (12) is inclined relative to the extension direction of the main rod body (1).

8. A compact spring nail driving connecting rod according to claim 1, characterized in that, The mounting hole (4) of the main rod body (1) is connected with a sub-link rod (9) through a rotating joint (8).

9. A compact spring nail driving connecting rod according to claim 8, characterized in that, The sub-link rod (9) is arc-shaped and a turning groove (91) for the end of the main rod body (1) to insert and rotate is opened at the end.

10. A compact spring nail driving connecting rod according to claim 8, wherein A rotational damping is arranged between the rotating joint (8) and the main rod body (1) as well as the sub-link rod (9).

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