A double connecting rod crank mechanism

Abstract

The utility model relates to mechanical drive technical field, especially a double connecting rod crank mechanism, including first connecting rod, second connecting rod and cam disc, first end rotation of first connecting rod is installed on first sliding block, the second end of first connecting rod is linked with rack;First end rotation of second connecting rod is installed on first connecting rod, the second end of second connecting rod is linked with second sliding block, the rack is installed at cam disc bottom and is driven through drive assembly to drive cam disc to drag first connecting rod and second connecting rod to make first sliding block and second sliding block reciprocating motion.The utility model passes through the synergistic effect of two connecting rods, has changed the transmission mode of winding resistance, makes the force that acts on the winding head more uniform, effectively improved the stability of winding power output, improved the winding speed, reduced the fatigue damage of spare part because of power fluctuation, prolonged the service life of winding machine transmission part.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical drive technical field, especially a kind of double connecting rod crank mechanism. BACKGROUND

[0002] In the existing winding machine technology, the crank connecting rod mechanism is the key component for realizing the conversion between the reciprocating motion of winding head and the rotating motion of crank. In the traditional single connecting rod crank mechanism, such as Chinese patent publication No. CN117559744B (a motor stator automatic winding integrated machine), during the winding process, due to the reciprocating inertia force of the winding head and the additional force generated by the connecting rod swing, the winding machine has problems such as large vibration and slow winding speed during operation. Especially in high-speed and thick wire conditions, these problems are more prominent, which limits the further improvement of winding speed and has a negative impact on the reliability and durability of the winding machine. SUMMARY

[0003] The utility model solves the problems in the related art and proposes a double connecting rod crank mechanism. Through the cooperative action of the two connecting rods, the transmission mode of winding resistance is changed, the force acting on the winding head is more uniform, the stability of winding power output is effectively improved, the winding speed is improved, the fatigue damage of parts caused by power fluctuation is reduced, and the service life of the transmission parts of the winding machine is prolonged.

[0004] To solve the above technical problems, the utility model is realized by the following technical scheme: a double connecting rod crank mechanism, comprising a first connecting rod, a second connecting rod and a cam disc, the first end of the first connecting rod is rotatably installed on a first sliding block, and the second end of the first connecting rod is connected with a rack; the first end of the second connecting rod is rotatably installed on the first connecting rod, and the second end of the second connecting rod is connected with a second sliding block, the rack is installed at the bottom of the cam disc and is driven by a driving assembly to drive the cam disc and then drag the first connecting rod and the second connecting rod to make the first sliding block and the second sliding block reciprocate.

[0005] As a preferred scheme, the first end of the first connecting rod is rotatably installed on the first sliding block through a needle bearing, and the first sliding block is slidingly installed on a first guide rod.

[0006] As a preferred scheme, the first end of the second connecting rod is rotatably installed on the middle part of the first connecting rod through a needle bearing, and the second end of the second connecting rod is installed on the second sliding block through a needle bearing, and the second sliding block is slidingly installed on the first guide rod.

[0007] As a preferred scheme, a counterweight is installed at the end of the cam disc away from the first connecting rod.

[0008] As a preferred scheme, the rack is engaged with a gear, and the gear is driven to rotate by the driving assembly.

[0009] As a preferred solution, the cam disc bottom is provided with a groove, the rack is installed in the groove, and the surfaces of the rack and the groove in contact are both toothed surfaces.

[0010] Compared with the prior art, the utility model has the beneficial effects that:

[0011] (1) Through the cooperative action of the two connecting rods, the transmission mode of the winding resistance is changed, the force acting on the winding head is more uniform, the stability of the winding power output is effectively improved, the winding speed is improved, the fatigue damage of the parts caused by power fluctuation is reduced, and the service life of the transmission part of the winding machine is prolonged.

[0012] (2) Since the two connecting rods are provided, the first connecting rod balances part of the load of the second connecting rod, reduces the stress of the second connecting rod, and improves the reliability of the connecting rod mechanism. At the same time, the staggered design of the two connecting rods in the installation position helps to further balance the inertial force generated by the reciprocating motion of the winding head, and reduces the vibration of the winding machine.

[0013] (3) The setting of the balance block on the cam disc can more accurately balance various unbalanced forces in the operation process of the winding machine, so that the winding machine can maintain a relatively stable running state under different rotating speeds and load conditions, reduces the noise caused by vibration, and improves the service life and overall quality of the winding machine. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 is the overall structure schematic view of the utility model;

[0015] Fig. 2 is the position relation schematic view of the gear and the rack of the utility model.

[0016] In the drawing:

[0017] 1, first connecting rod, 2, second connecting rod, 3, first sliding block, 4, rack, 5, second sliding block, 6, cam disc, 7, first guide rod, 8, gear, 9, counterweight, 10, winding main shaft. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, but not as any limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0019] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, devices, components and / or combinations thereof, but do not preclude the presence or addition of one or more other features, steps, operations, devices, components and / or combinations thereof.

[0020] The relative arrangement of parts and steps, numerical expressions, and numerical values set forth in the examples are not intended to limit the scope of the present application unless otherwise specifically stated. It is to be understood that the drawings are not necessarily to scale of the various parts shown in the drawings. Techniques, methods, and apparatus known to those of ordinary skill are not discussed in detail because they would be considered as too general. In all examples shown and discussed herein, any specific value is to be interpreted as merely an example and not a limitation. Thus, other examples of the example embodiments can have different values. It is noted that like numbers and letters on the figures identify like parts throughout the several views, and thus, once an item is defined in one figure, it is not necessary to discuss it further in connection with other figures where it is understood to be the same.

[0021] In the description of the present application, it is to be understood that the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" and the like indicated orientation or position relationship are usually based on the orientation or position relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, without making the opposite statement, these orientation words do not indicate and imply that the indicated device or element must have a particular orientation or be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the scope of protection of the present application; the orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.

[0022] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0023] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0024] like Figs. 1-2 As shown, a double-link crankshaft mechanism includes a first link 1, a second link 2, and a cam disk 6. The first end of the first link 1 is rotatably mounted on a first slider 3 via a needle roller bearing, and the second end of the first link 1 is connected to a rack 4. The first end of the second link 2 is rotatably mounted on the middle of the first link 1 via a needle roller bearing, and the second end of the second link 2 is connected to a second slider 5. Both the first slider 3 and the second slider 5 are slidably mounted on a first guide rod 7. The rack 4 is mounted on the bottom of the cam disk 6 and is driven by a drive assembly to drive the cam disk 6, which in turn drags the first link 1 and the second link 2, causing the first slider 3 and the second slider 5 to reciprocate. The second slider 5 is connected to a winding spindle 10, which in turn drives the winding spindle 10 to reciprocate.

[0025] In one embodiment, a counterweight 9 is installed at the end of the cam disk 6 away from the first connecting rod 1 to balance the inertial force and centrifugal force generated by the movement of the cam disk 6 and the two connecting rods during the operation of the winding machine, thereby further reducing vibration.

[0026] In one embodiment, the rack 4 meshes with the gear 8 and the gear 8 is driven to rotate by a drive assembly (such as a motor). When the gear 8 rotates, it drives the rack 4 to move linearly. The rack 4 is disposed on a rack plate. Specifically, a strip-shaped opening is provided on the rack plate, and a rack 4 is formed on one side of the strip-shaped opening. The gear 8 is located inside the strip-shaped opening and meshes with the side of the strip-shaped opening with the rack 4.

[0027] In one embodiment, the cam disc 6 is provided with a groove 601 at the bottom, the rack 4 is installed in the groove 601 to slide in the groove 601, and the surfaces of the rack 4 and the groove 601 in contact are all toothed surfaces, which can share the load, improve the overall carrying capacity, increase the effective contact area, reduce the local wear, and prolong the service life.

[0028] The above is the preferred embodiment of the present application, and the skilled in the art of the present application can also change and modify the above embodiment, therefore, the present application is not limited to the above specific embodiments, and any obvious improvement, replacement or modification made by the skilled in the art on the basis of the present application all belong to the protection scope of the present application.

Claims

1. A two-bar linkage crank mechanism, characterized by: The first connecting rod (1), the second connecting rod (2) and the cam disc (6) are included, the first end of the first connecting rod (1) is rotatably installed on the first slider (3), and the second end of the first connecting rod (1) is connected with the rack (4); the first end of the second connecting rod (2) is rotatably installed on the first connecting rod (1), the second end of the second connecting rod (2) is connected with the second slider (5), the rack (4) is installed at the bottom of the cam disc (6) and is driven by the driving assembly to drive the cam disc (6) to drag the first connecting rod (1) and the second connecting rod (2) to make the first slider (3) and the second slider (5) reciprocate.

2. The dual-connecting-rod crank mechanism of claim 1, wherein: The first end of the first connecting rod (1) is rotatably installed on the first slider (3) through a needle bearing, and the first slider (3) is slidably installed on the first guide rod (7).

3. The dual-connecting-rod crank mechanism of claim 1, wherein: The first end of the second connecting rod (2) is rotatably installed on the middle part of the first connecting rod (1) through a needle bearing, the second end of the second connecting rod (2) is rotatably installed on the second slider (5) through a needle bearing, and the second slider (5) is slidably installed on the first guide rod (7).

4. The dual-connecting-rod crank mechanism of claim 1, wherein: The cam disc (6) is provided with a counterweight (9) at the end away from the first connecting rod (1).

5. The dual-connecting-rod crank mechanism of claim 1, wherein: The rack (4) is engaged with the gear (8), and the gear (8) is driven to rotate by the driving assembly.

6. The dual-connecting-rod crank mechanism of claim 1, wherein: The bottom of the cam disc (6) is provided with a groove (601), the rack (4) is installed in the groove (601), and the surfaces of the rack (4) and the groove (601) in contact are both toothed surfaces.

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