Connecting rod transmission mechanism

Abstract

The utility model provides a connecting rod transmission mechanism, and belongs to the technical field of connecting rod mechanisms. The rotating block is hinged to the connecting rod through a hinge shaft, the rotating block and the connecting rod form an assembly component, and the connecting rod has a first degree of freedom of rotating around the hinge shaft relative to the rotating block; the rotating block is rotatably connected with the rotating shaft, and the assembly component has a second degree of freedom of rotating around the rotating shaft; the cross-plane transmission mechanism has the advantages that torque and motion can be transmitted between two plane mechanisms, so that the purpose of cross-plane transmission of torque and motion is achieved, non-unique motion caused by excess freedom of motion and interference stress caused by low freedom of motion can be avoided, and the whole structure is reasonable and stable.

Description

Technical Field

[0001] The utility model belongs to the technical field of connecting rod mechanisms and relates to a connecting rod transmission mechanism. Background Art

[0002] With the development of electric vehicles, the demand for motion functions of automotive parts is gradually increasing; the connecting rod mechanism is a relatively common motion transmission mechanism and is used in some automotive parts.

[0003] The traditional planar linkage mechanism only requires one degree of rotational freedom for the transmission connection point, and a simple riveted pin can meet the structural requirements; if it is necessary to transmit torque and motion between multiple planar mechanisms, the original single-plane linkage mechanism will not be applicable.

[0004] Currently, there are some transmission mechanisms that can transmit torque and motion between two planar mechanisms. This type of transmission mechanism has some shortcomings. Either the freedom is too much, resulting in the product being unable to determine the movement, thus affecting the product function; or the freedom is too little, resulting in interference within the mechanism, causing the torque and motion to be unable to be transmitted, posing a hidden danger to the system stability. Utility Model Content

[0005] The purpose of the utility model is to propose a connecting rod transmission mechanism in view of the above problems existing in the prior art.

[0006] The purpose of the utility model can be achieved through the following technical solutions: a connecting rod transmission mechanism, comprising:

[0007] link;

[0008] A rotating block, wherein the rotating block is hinged to the connecting rod via a hinge shaft, and the rotating block and the connecting rod form an assembly component, and the connecting rod has a first degree of freedom of rotation around the hinge shaft relative to the rotating block;

[0009] A rotating shaft, the rotating block is rotatably connected to the rotating shaft, and the assembly component has a second degree of freedom of rotation around the rotating shaft.

[0010] Preferably, the connecting rod is installed with a cover plate, and the connecting rod is connected to the rotating block through the cover plate to form the assembly component.

[0011] Preferably, the number of the hinge shafts is two, the two hinge shafts are coaxially arranged and respectively fixed to the two outer side walls of the rotating block, the connecting rod has two open grooves, the two hinge shafts are respectively embedded in the two open grooves, the cover plate presses the two hinge shafts and constrains the two hinge shafts in the two open grooves respectively so that the connecting rod and the rotating block constitute the assembly component.

[0012] Preferably, the cover plate covers the connecting rod and is fixedly connected to the connecting rod by screws.

[0013] Preferably, the cover plate has two pressing block parts, and the two pressing block parts are respectively embedded in the openings of the two opening grooves and press the hinge shaft.

[0014] Preferably, the connecting rod is provided with a mounting hole, and the rotating block is mounted in the mounting hole; a space is reserved between the mounting hole and the rotating block so that the connecting rod is allowed to rotate relative to the rotating block.

[0015] Preferably, the rotating block is provided with an axial hole, and the rotating shaft passes through the axial hole.

[0016] Preferably, a bearing sleeve is provided between the shaft hole and the rotating shaft for supporting the rotating block to rotate relative to the rotating shaft.

[0017] Preferably, the axis of the hinge shaft is perpendicular to the axis of the rotating shaft.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] 1. It provides a device that can transfer torque and motion between two planar mechanisms, thereby achieving the purpose of transferring torque and motion across planes, and can also avoid non-unique motion caused by excessive freedom of motion and interference force caused by insufficient freedom of motion. The overall structure is reasonable and stable.

[0020] 2. The cover plate can constrain the rotating block and the connecting rod together, so that the connecting rod and the rotating block rotate around the rotating axis as a whole (assembly component) without hindering the connecting rod from rotating relative to the rotating block.

[0021] 3. The pressing block part cooperates with the open groove to form a hinge hole structure, thereby constraining the hinge shaft in the open groove and limiting the radial freedom of the hinge shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the connecting rod transmission mechanism of the utility model.

[0023] Figure 2 The figure is a schematic diagram of the connection relationship among the connecting rod, the rotating block and the rotating shaft of the utility model.

[0024] Figure 3 It is a half-section schematic diagram of the connecting rod transmission mechanism of the utility model.

[0025] Figure 4 It is a schematic diagram of the cover plate of the utility model pressing the hinge shaft.

[0026] Figure 5It is a schematic diagram of the connecting rod transmission mechanism of the utility model from another perspective.

[0027] In the figure, 100, assembly component; 200, connecting rod; 210, open groove; 220, mounting hole; 300, rotating block; 310, hinge shaft; 320, shaft hole; 330, bearing sleeve; 400, rotating shaft; 500, cover plate; 510, pressing block part; 520, screw. DETAILED DESCRIPTION

[0028] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0029] like Figure 1-5 As shown, a connecting rod transmission mechanism includes: a connecting rod 200, a rotating block 300 and a rotating shaft 400, the rotating block 300 is hinged to the connecting rod 200 through a hinge shaft 310, and the rotating block 300 and the connecting rod 200 form an assembly component 100, the connecting rod 200 has a first degree of freedom of rotation around the hinge shaft 310 relative to the rotating block 300; the rotating block 300 is rotatably connected to the rotating shaft 400, and the assembly component 100 has a second degree of freedom of rotation around the rotating shaft 400.

[0030] The connecting rod 200 is connected to the two planar mechanisms, that is, the connecting rod 200 is shared by the two planar mechanisms. The connecting rod 200 is used to connect the two planar mechanisms and transmit torque and motion between the two planar mechanisms. The connecting rod 200 and the rotating block 300 constitute an assembly component 100. In the assembly component 100, the connecting rod 200 can rotate around the hinge axis 310 to form a first degree of freedom, and the assembly component 100 as a whole can rotate around the rotating shaft 400 to form a second degree of freedom, so that the connecting rod transmission mechanism has two degrees of freedom; and it should be pointed out that when the assembly component 100 rotates around the rotating shaft 400 as a whole, the connecting rod 200 and the rotating block 300 are constrained together and move together.

[0031] The invention provides a device capable of transmitting torque and motion between two planar mechanisms, thereby achieving the purpose of transmitting torque and motion across planes, and can also avoid non-unique motion caused by excessive freedom of motion and interference force caused by insufficient freedom of motion. The overall structure is reasonable and stable.

[0032] like Figure 1-5As shown, on the basis of the above embodiment, the connecting rod 200 is installed with a cover plate 500, and the connecting rod 200 is connected to the rotating block 300 through the cover plate 500 to form the assembly component 100. The cover plate 500 is a plate body covering the connecting rod 200. The cover plate 500 can constrain the rotating block 300 and the connecting rod 200 together, so that the connecting rod 200 and the rotating block 300 rotate around the rotating shaft 400 as a whole (assembly component 100), and will not hinder the connecting rod 200 from rotating relative to the rotating block 300.

[0033] Preferably, the cover plate 500 covers the connecting rod 200 and is fixedly connected to the connecting rod 200 via screws 520 .

[0034] On the basis of the above embodiment, the number of the hinge shafts 310 is two, the two hinge shafts 310 are coaxially arranged and respectively fixed to the two outer side walls of the rotating block 300, the connecting rod 200 has two opening grooves 210, the two hinge shafts 310 are respectively embedded in the two opening grooves 210, the cover plate 500 presses the two hinge shafts 310 and constrains the two hinge shafts 310 in the two opening grooves 210 respectively so that the connecting rod 200 and the rotating block 300 form the assembly component 100.

[0035] In this embodiment, the two side walls of the rotating block 300 protrude outward to form a hinge shaft 310, and the two hinge shafts 310 are coaxially arranged, and the hinge shaft 310 can be embedded in the open groove 210. The open groove 210 acts as a hinge hole so that the connecting rod 200 can rotate relative to the rotating block 300 through the hinge shaft 310, and the hinge shaft 310 is located in the open groove 210 so that the connecting rod 200 and the rotating block 300 can rotate together around the rotating shaft 400, that is, when the assembly component 100 rotates around the rotating shaft 400, the connecting rod 20 0 is constrained together with the rotating block 300 through the opening groove 210 and the hinge shaft 310; since the opening groove 210 has an opening, the rotating block 300 is directly installed in the installation hole 220 during installation, and the two hinge shafts 310 are embedded in the two opening grooves 210, and then the cover plate 500 is installed. After the cover plate 500 is installed in place, it presses the two hinge shafts 310 and seals the opening of the opening groove 210, so that the rotating block 300 and the connecting rod 200 are assembled together to prevent the hinge shaft 310 from falling out of the opening groove 210.

[0036] On the basis of the above embodiment, the cover plate 500 has two pressing blocks 510, which are respectively embedded in the openings of the two opening grooves 210 and press the hinge shaft 310. The pressing blocks 510 cooperate with the opening grooves 210 to form a hinge hole structure, thereby constraining the hinge shaft 310 in the opening grooves 210 and limiting the radial freedom of the hinge shaft 310.

[0037] like Figure 1 , Figure 3 As shown, based on the above embodiment, the connecting rod 200 is provided with a mounting hole 220, and the rotating block 300 is installed in the mounting hole 220; a space is reserved between the mounting hole 220 and the rotating block 300 so that the connecting rod 200 is allowed to rotate relative to the rotating block 300.

[0038] like Figure 1-3 As shown, on the basis of the above embodiment, the rotating block 300 is provided with a shaft hole 320 , and the rotating shaft 400 is passed through the shaft hole 320 .

[0039] On the basis of the above embodiment, a bearing sleeve 330 for supporting the rotating block 300 to rotate relative to the rotating shaft 400 is provided between the shaft hole 320 and the rotating shaft 400. The bearing sleeve 330 can make the assembly mechanism rotate more smoothly around the rotating shaft 400.

[0040] The connecting rod transmission mechanism has a simple structure, high reliability, low cost, and can effectively transmit spatial torque and motion to achieve the motion requirements of two spatial degrees of freedom.

[0041] like Figure 1-3 As shown, based on the above embodiment, the axis of the hinge shaft 310 is perpendicular to the axis of the rotating shaft 400. In this embodiment, the connecting rod 200 has a first degree of freedom, and the assembly component 100 formed by the connecting rod 200 and the rotating block 300 has a second degree of freedom. When the connecting rod 200 rotates around the hinge shaft 310, it rotates on one plane, and when the assembly component 100 rotates around the rotating shaft 400, it rotates on another plane.

[0042] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0043] In addition, in the present invention, the descriptions of "first", "second", "one", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0044] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A connecting rod transmission mechanism, characterized in that: include: Connecting rod (200); a rotating block (300), the rotating block (300) being hinged to the connecting rod (200) via a hinge shaft (310), the rotating block (300) and the connecting rod (200) forming an assembly component (100), the connecting rod (200) having a first degree of freedom of rotation relative to the rotating block (300) around the hinge shaft (310); A rotating shaft (400), the rotating block (300) is rotatably connected to the rotating shaft (400), and the assembly component (100) has a second degree of freedom of rotation around the rotating shaft (400).

2. A connecting rod transmission mechanism according to claim 1, characterized in that: The connecting rod (200) is installed with a cover plate (500), and the connecting rod (200) is connected to the rotating block (300) through the cover plate (500) to form the assembly component (100).

3. A connecting rod transmission mechanism according to claim 2, characterized in that: The number of the hinge shafts (310) is two, the two hinge shafts (310) are coaxially arranged and respectively fixed to the two outer side walls of the rotating block (300), the connecting rod (200) has two opening grooves (210), the two hinge shafts (310) are respectively embedded in the two opening grooves (210), the cover plate (500) presses the two hinge shafts (310) and constrains the two hinge shafts (310) in the two opening grooves (210) so that the connecting rod (200) and the rotating block (300) form the assembly component (100).

4. A connecting rod transmission mechanism according to claim 2, characterized in that: The cover plate (500) covers the connecting rod (200) and is fixedly connected to the connecting rod (200) via screws (520).

5. A connecting rod transmission mechanism as claimed in claim 3, characterized in that: The cover plate (500) has two pressing block parts (510), and the two pressing block parts (510) are respectively embedded in the openings of the two opening grooves (210) and press the hinge shaft (310).

6. A connecting rod transmission mechanism according to claim 1, characterized in that: The connecting rod (200) is provided with a mounting hole (220), and the rotating block (300) is mounted on the mounting hole (220); a space is reserved between the mounting hole (220) and the rotating block (300) so that the connecting rod (200) is allowed to rotate relative to the rotating block (300).

7. A connecting rod transmission mechanism according to claim 1, characterized in that: The rotating block (300) is provided with an axial hole (320), and the rotating shaft (400) is passed through the axial hole (320).

8. A connecting rod transmission mechanism according to claim 7, characterized in that: A bearing sleeve (330) is provided between the shaft hole (320) and the rotating shaft (400) for supporting the rotating block (300) to rotate relative to the rotating shaft (400).

9. A connecting rod transmission mechanism according to any one of claims 1 to 8, characterized in that: The axis of the hinge shaft (310) is perpendicular to the axis of the rotating shaft (400).

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