Top extension type connecting rod crankshaft mechanism

Abstract

The utility model relates to the technical field of crankshafts, in particular to a top extension type connecting rod crankshaft mechanism which comprises a front end shaft, a rear end shaft, two cranks, a balance block, two connecting rod shafts and a plurality of interior angle screws, the balance block and the two cranks are arranged between the front end shaft and the rear end shaft at intervals through the connecting rod shafts and the interior angle screws, the connecting rod shaft is fixedly connected with the balance block and the two cranks through the inner angle screws, and the inner angle screws penetrate through the connecting rod shaft. By means of the crankshaft, manufacturing of the crankshaft and replacement and maintenance of local parts of the crankshaft in the later period can be conveniently achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of crankshafts, and specifically relates to a top-extending connecting rod crankshaft mechanism. Background Art

[0002] The crankshaft is composed of the main journal, connecting rod journal, crankshaft arm, balance block, front axle end and rear axle end. The crankshaft is the main rotating part of the engine. After the connecting rod is installed, it can take over the up and down movement of the connecting rod and convert it into a circular motion. It is an important part of the engine. At present, the crankshaft connecting rod is fixed to the crankshaft by bolts. The crankshaft is subjected to the combined action of the centrifugal force of the rotating mass, the periodically changing gas inertia force and the reciprocating inertia force, so that the crankshaft is subjected to bending and torsional loads.

[0003] Currently, there are two types of crankshafts on the market: integrated and split-assembly types. Split-assembly crankshafts have advantages in dealing with crankshaft maintenance. For example, a Chinese patent for a split-assembly transmission crankshaft, announcement number: CN218913449U, in which the connecting shaft and the balance block are detachably connected by screws, a limiting mechanism and an anti-loosening mechanism, can facilitate the replacement and maintenance of local components of the crankshaft. However, the disadvantage of this patent is that the structures of the limiting mechanism and the anti-loosening mechanism are too complicated, which will increase the complexity of manufacturing the crankshaft and make it more troublesome to disassemble it later. Based on this, we propose a top-extending connecting rod crankshaft mechanism to facilitate manufacturing and the later replacement and maintenance of parts of the crankshaft. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a top-extending connecting rod crankshaft mechanism, which can facilitate the manufacture of the crankshaft and the subsequent replacement and maintenance of parts of the crankshaft.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a top-extending connecting rod crankshaft mechanism, comprising a front end shaft, a rear end shaft, two cranks, a balancing block, two connecting rod shafts and a plurality of internal angle screws, wherein the balancing block is arranged between the front end shaft and the rear end shaft at intervals with the two cranks through the connecting rod shaft and the internal angle screws, wherein the connecting rod shaft is fixedly connected to the balancing block and the two cranks through the internal angle screws and the internal angle screws pass through the connecting rod shaft.

[0006] Preferably, the connecting rod shaft consists of a connecting rod shaft body and connecting keys arranged at both ends of the connecting rod shaft body; key slots adapted to the connecting keys are provided on the balancing block and the two cranks; the connecting key is at least partially embedded in the key slot at the corresponding position; and the internal angle screw passes through the connecting key and the key slot.

[0007] Preferably, the connecting key is a square block structure.

[0008] Preferably, the connecting key is a cylindrical structure.

[0009] Preferably, the internal angle screw and the connecting key are threadedly connected.

[0010] Preferably, the balancing block and the two cranks are provided with connecting holes; the opening direction of the connecting holes is perpendicular to the opening direction of the keyways at corresponding positions and the keyways are connected to the connecting holes; the internal angle screws are arranged on the inner side of the connecting holes.

[0011] Preferably, the connecting hole is a countersunk hole.

[0012] Preferably, a through hole is opened on the outer periphery of the connecting rod shaft body.

[0013] Preferably, a front axle hole is formed at the axis center of the front end shaft, and a rear axle hole is formed at the axis center of the rear end shaft; the front axle hole and the rear axle hole are both connected to the through hole space.

[0014] Preferably, the internal angle screw is threadedly connected to the balance block and the two cranks.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows: by making the balancing block and the front crank and the rear crank detachably connected through the connecting rod shaft and the internal angle screw, keyways and connecting holes are opened on the balancing block, the front crank and the rear crank, the opening direction of the connecting hole is perpendicular to the opening direction of the keyway and the keyway is connected to the connecting hole, and by inserting the connecting key of the connecting rod shaft into the keyway and simultaneously passing the internal angle screw through the connecting key, the stability of the split assembled crankshaft structure is achieved, and the optimized structure is more convenient for manufacturing and the later replacement and maintenance of parts of the crankshaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the crankshaft of the utility model;

[0017] Figure 2 It is a schematic diagram of an axial cross section of a crankshaft of the utility model;

[0018] Figure 3 For the utility model Figure 2 Schematic diagram at A in the middle;

[0019] Figure 4 It is a schematic structural diagram of the connecting rod shaft of the utility model.

[0020] In the figure: 1 front end shaft, 2 rear end shaft, 3 front crank, 4 rear crank, 5 balance block, 6 connecting rod shaft, 7 internal angle screw, 11 front shaft hole, 21 rear shaft hole, 41 keyway, 42 connecting hole, 61 connecting rod shaft body, 62 connecting key, 63 positioning hole, 64 through hole. DETAILED DESCRIPTION

[0021] The following describes the specific implementation of the utility model in detail in conjunction with the accompanying drawings so that those skilled in the art can more clearly understand how to practice the utility model. Although the utility model is described in conjunction with its preferred specific embodiments, these embodiments are only illustrative, rather than limiting the scope of the utility model.

[0022] Specific embodiment 1: Please refer to Figure 1-4 A top-extending connecting rod crankshaft mechanism comprises: a front end shaft 1, a rear end shaft 2, a front crank 3, a rear crank 4, a balancing block 5, two connecting rod shafts 6 and a plurality of internal angle screws 7, wherein the front end shaft 1, the front crank 3, the balancing block 5, the rear crank 4 and the rear end shaft 2 are sequentially arranged in the axial direction, wherein the front end shaft 1 and the rear end shaft 2 are coaxially arranged, the front end shaft 1 is fixedly connected to the front crank 3, the rear crank 4 is fixedly connected to the rear end shaft 2, the balancing block 5 is detachably connected to the front crank 3 and the rear crank 4 through the connecting rod shaft 6 and the internal angle screw 7, the two connecting rod shafts 6 are eccentric shafts with different axes, and the detachable connection method can facilitate the replacement and maintenance of parts of the crankshaft.

[0023] In this embodiment, the front crank 3 and the rear crank 4 have the same structure, and the balancing block 5 is connected to the front crank 3 and the rear crank 4 in the same manner. The following is an example in which the balancing block 5 and the rear crank 4 are detachably connected through the connecting rod shaft 6 and the internal angle screw 7.

[0024] Specifically, the connecting rod shaft 6 includes a connecting rod shaft body 61 and two square block-shaped connecting keys 62, which are respectively fixed at the two axial ends of the connecting rod shaft body 61, and each connecting key 62 is provided with a positioning hole 63; an internal thread is provided in the positioning hole 63; the opening direction of the positioning hole 63 in this embodiment is perpendicular to the axis of the connecting rod shaft body 61; in addition, a through hole 64 is also longitudinally provided on the connecting rod shaft body 61, and the through hole 64 can not only serve as a channel for lubricating oil but also reduce the mass of the crankshaft, which is beneficial to improving the performance of the crankshaft.

[0025] The balance block 5 and the rear crank 4 are both provided with a keyway 41 and a connecting hole 42. The keyway 41 is adapted to the connecting key 62. The connecting hole 42 is provided in a direction perpendicular to the direction in which the keyway 41 is provided and the keyway 41 is connected to the connecting hole 42. Figure 3After assembly, the connecting key 62 is embedded in the keyway 41, the internal angle screw 7 is arranged in the connecting hole 42 and passes through the positioning hole 63 and the keyway 41, and the internal angle screw 7 is threadedly connected to the rear crank 4 and the connecting rod shaft 6. Through such an arrangement, the connecting rod shaft 6 and the rear crank 4 can be connected and fixed and will not be easily separated, thereby ensuring the stability of the crankshaft structure; further, in order to further ensure the stability of the crankshaft structure, the connecting hole 42 is a countersunk hole, and the internal angle screw 7 is completely immersed in the inner side of the connecting hole 42; similarly, the balancing block 5 is connected to the connecting rod shaft 6 by the internal angle screw 7, and its method is consistent with the above method; an internal thread is provided in the connecting hole 42.

[0026] In one embodiment, the shape of the connection key 62 is not limited to the above-mentioned square block structure, but may also be cylindrical.

[0027] In this embodiment, a front axle hole 11 is opened at the axis center of the front end shaft 1, and a rear axle hole 21 is opened at the axis center of the rear end shaft 2. The front axle hole 11 and the rear axle hole 21 are mainly used for lubricating and cooling the crankshaft and its related moving parts. They also allow engine oil to be introduced or led out, thereby effectively lubricating the journal surface and reducing friction and wear.

[0028] Furthermore, the front axle hole 11 and the rear axle hole 21 are both spatially connected to the through holes 64 at corresponding positions, so that the engine oil can fully lubricate the crankshaft surface.

[0029] Through the technical solution, the balancing block is detachably connected to the front crank and the rear crank through the connecting rod shaft and the internal angle screw, keyways and connecting holes are opened on the balancing block, the front crank and the rear crank, the opening direction of the connecting hole is perpendicular to the opening direction of the keyway and the keyway is connected to the connecting hole, and the connecting key of the connecting rod shaft is inserted into the keyway and the internal angle screw is passed through the connecting key to achieve the stability of the split assembled crankshaft structure, and the simple structure facilitates manufacturing and the subsequent replacement and maintenance of parts of the crankshaft.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A top-extending connecting rod crankshaft mechanism, comprising a front end shaft (1), a rear end shaft (2), two cranks, a balancing block (5), two connecting rod shafts (6) and a plurality of internal angle screws (7), characterized in that: The balancing block (5) is arranged between the front end shaft (1) and the rear end shaft (2) at intervals with the two cranks via a connecting rod shaft (6) and an internal angle screw (7), wherein the connecting rod shaft (6) is fixedly connected to the balancing block (5) and the two cranks via the internal angle screw (7), and the internal angle screw (7) passes through the connecting rod shaft (6).

2. The top-extending connecting rod crankshaft mechanism according to claim 1, characterized in that: The connecting rod shaft (6) is composed of a connecting rod shaft body (61) and connecting keys (62) provided at both ends of the connecting rod shaft body (61); the balancing block (5) and the two cranks are provided with keyways (41) adapted to the connecting keys (62); the connecting keys (62) are at least partially embedded in the keyways (41) at corresponding positions; and the internal angle screws (7) are provided to penetrate the connecting keys (62) and the keyways (41).

3. The top-extending connecting rod crankshaft mechanism according to claim 2, characterized in that: The connecting key (62) is a square block structure.

4. The top-extending connecting rod crankshaft mechanism according to claim 2, characterized in that: The connecting key (62) is a cylindrical structure.

5. The top-extending connecting rod crankshaft mechanism according to claim 2, characterized in that: The internal angle screw (7) and the connecting key (62) are threadedly connected.

6. The top-extending connecting rod crankshaft mechanism according to claim 2, characterized in that: The balancing block (5) and the two cranks are both provided with connecting holes; the connecting holes are provided in a direction perpendicular to the direction of the key slots (41) at corresponding positions, and the key slots (41) are connected to the connecting holes; and the internal angle screws (7) are provided inside the connecting holes.

7. The top-extending connecting rod crankshaft mechanism according to claim 6, characterized in that: The connecting hole is a countersunk hole.

8. The top-extending connecting rod crankshaft mechanism according to claim 2, characterized in that: A through hole (64) is formed on the outer periphery of the connecting rod shaft body (61).

9. The top-extending connecting rod crankshaft mechanism according to claim 8, characterized in that: The center of the front shaft (1) is provided with a front shaft hole, and the center of the rear shaft (2) is provided with a rear shaft hole; the front shaft hole and the rear shaft hole are both spatially connected to the through hole (64).

10. A top-extending connecting rod crankshaft mechanism according to claim 1 or 5, characterized in that: The internal angle screw (7) is threadedly connected to the balance block (5) and the two cranks.

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