Composite crankshaft

Abstract

The utility model discloses a combined type crankshaft, relates to the technical field of automobile crankshafts, and aims to provide a combined type crankshaft convenient to assemble, which comprises a plurality of groups of crankshaft components, a first main shaft section and a second main shaft section, a first supporting shaft is fixed to the first installation disc, a second supporting shaft is fixed to the second installation disc, the first supporting shaft and the second supporting shaft are sleeved with the bearing, the first installation disc and the second installation disc are connected through a first connecting assembly, and a second connecting assembly used for connecting every two adjacent crankshaft assemblies is arranged between every two adjacent crankshaft assemblies. The crankshaft assembly is provided with the multiple crankshaft assemblies used for bearing the bearings, in the assembling process, the first supporting shaft and the second supporting shaft are sleeved with the bearings, then the pistons are connected with the bearings, the pistons and the crankshafts can be rotationally connected, the requirement for the surface machining precision of the crankshafts is low, and the production cost is low.

Description

Technical Field

[0001] This utility model relates to the field of automotive crankshaft technology, and more specifically, to a composite crankshaft. Background Technology

[0002] As a key component of an engine, the crankshaft converts the reciprocating motion of the piston into rotational motion and transmits power to other parts. Most crankshafts on the market are currently one-piece molded, a structure that requires extremely high machining precision on the crankshaft surface. Because the piston assembly needs to rotate and be mounted on the crankshaft, the surface roughness, roundness, cylindricity, and other precision indicators directly affect the engine's performance, efficiency, and lifespan. However, achieving such high machining precision is no easy feat, requiring high-precision machining equipment, advanced processing techniques, and a rigorous quality control system. This undoubtedly increases the difficulty of crankshaft machining and manufacturing costs.

[0003] Given the aforementioned problems with one-piece molded crankshafts, there is an urgent need for a composite crankshaft that can be assembled with bearings. By designing the crankshaft and bearings as separate components, the composite crankshaft can reduce the requirements for the machining precision of the crankshaft surface to some extent. Utility Model Content

[0004] In view of the problems existing in the prior art, this utility model provides a composite crankshaft to solve the technical problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a composite crankshaft, comprising multiple crankshaft assemblies, a first main shaft section, and a second main shaft section. The crankshaft assembly is used to carry bearings and includes a first mounting plate, a second mounting plate, and a first connecting assembly. A first support shaft is fixed on the first mounting plate, and a second support shaft is fixed on the second mounting plate. The bearing is sleeved on the first and second support shafts. The first and second mounting plates are connected by the first connecting assembly. A second connecting assembly is provided between adjacent crankshaft assemblies to connect them. The first main shaft section is fixed on the first mounting plate in the first end crankshaft assembly, and the second main shaft section is fixed on the second mounting plate in the last end crankshaft assembly. The axes of the first and second main shaft sections are collinear.

[0006] The present invention is further configured such that a first limiting shaft is fixed on the first supporting shaft, a first guide strip is fixed outside the first limiting shaft, a first limiting hole adapted to the first limiting shaft is opened on the second supporting shaft, and a first guide groove adapted to the first guide strip is opened on the hole wall of the first limiting hole.

[0007] The present invention is further configured such that the first connecting assembly includes a connecting sleeve and a connecting screw, one end of the connecting sleeve is fixed with a first limiting head, one end of the connecting screw is fixed with a second limiting head, the first mounting plate and the first support shaft have a first through hole for the connecting sleeve to pass through, the second mounting plate and the second support shaft have a second through hole for the connecting screw to pass through, and the connecting sleeve has a threaded hole for threaded connection with the connecting screw, and the first mounting plate and the second mounting plate are located between the first limiting head and the second limiting head.

[0008] The present invention is further configured such that the cross-section of the first limiting head is polygonal, the first mounting plate is provided with a first limiting groove adapted to the first limiting head, the cross-section of the second limiting head is circular, the second mounting plate is provided with a first clearance groove adapted to the second limiting head, and the second limiting head is provided with a hexagonal groove.

[0009] The present invention is further configured such that the structure of the second connecting component is the same as that of the first connecting component, and is used to connect the second mounting plate and the first mounting plate in two adjacent crankshaft assemblies.

[0010] The present invention is further configured such that a third support shaft is fixed on the side of the second mounting plate facing the next set of crankshaft assemblies, a fourth support shaft is fixed on the first mounting plate of the next set of crankshaft assemblies corresponding to the third support shaft, a second limiting shaft is fixed on the third support shaft, a plurality of second guide strips are provided at equal intervals outside the second limiting shaft, and a second limiting hole adapted to the second limiting shaft is provided on the fourth support shaft, and a second guide groove adapted to the second guide strip is provided on the hole wall of the second limiting hole, which is used to adjust the offset angle of the two adjacent sets of crankshaft assemblies.

[0011] The present invention is further configured such that the second mounting plate and the third support shaft are provided with a third through hole for the connecting sleeve in the second connecting assembly to pass through, and the second mounting plate is also provided with a second limiting groove that is adapted to the first limiting head in the second connecting assembly.

[0012] The present invention is further configured such that the first mounting plate and the fourth support shaft are provided with a fourth through hole for the connecting screw in the second connecting assembly to pass through, and the first mounting plate is also provided with a second clearance groove adapted to the second limiting head in the second connecting assembly.

[0013] The present invention is further configured such that the axes of the first support shaft and the fourth support shaft on the first mounting plate are not collinear, and the axes of the second support shaft and the third support shaft on the second mounting plate are not collinear.

[0014] Compared with the prior art, the present invention provides a composite crankshaft, which has the following beneficial effects:

[0015] 1. This application has multiple crankshaft assemblies for receiving bearings. During assembly, the bearings are sleeved on the first and second support shafts, and then the piston is connected to the bearings, so that the piston and crankshaft can be rotated. This reduces the surface machining accuracy requirements of the crankshaft and lowers the production cost.

[0016] 2. In this application, two adjacent crankshaft assemblies are connected by a second connecting assembly, and the second limiting shaft has multiple second limiting strips that are equally spaced apart, which can adjust the included angle between the two adjacent crankshaft assemblies. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the composite crankshaft in this utility model;

[0018] Figure 2 This is a schematic diagram of the structure of a single crankshaft assembly in this utility model;

[0019] Figure 3 In this utility model Figure 2 A schematic diagram of the exploded structure;

[0020] Figure 4 This is a schematic diagram of the structure of the first and second mounting disks in the present invention when they are not connected.

[0021] In the diagram: 1. Crankshaft assembly; 11. First mounting plate; 1101. First support shaft; 1102. First limiting shaft; 1103. First guide strip; 1104. First through hole; 1105. First limiting groove; 1106. Fourth support shaft; 1107. Second guide groove; 1108. Fourth through hole; 1109. Second clearance groove; 1110. Second limiting hole; 12. Second mounting plate; 1201. Second support shaft; 1202. First limiting hole; 1203. 1204. First guide groove; 1205. Second through hole; 1206. First clearance groove; 1207. Third support shaft; 1208. Second limiting shaft; 1209. Second guide strip; 12000. Third through hole; 1210. Second limiting groove; 13. First connecting assembly; 131. Connecting sleeve; 132. Connecting screw; 133. First limiting head; 134. Second limiting head; 135. Threaded hole; 136. Hexagonal groove; 2. First spindle section; 3. Second spindle section. Detailed Implementation

[0022] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0023] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0024] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0025] Please see Figure 1-4 A composite crankshaft includes multiple crankshaft assemblies 1, a first main shaft section 2, and a second main shaft section 3. The crankshaft assembly 1, used to carry bearings, includes a first mounting plate 11, a second mounting plate 12, and a first connecting assembly 13. A first support shaft 1101 is fixed on the first mounting plate 11, and a second support shaft 1201 is fixed on the second mounting plate 12. The bearings are sleeved on the first support shaft 1101 and the second support shaft 1201. The first mounting plate 11 and the second mounting plate 12 are connected by the first connecting assembly 13. There is a second connecting assembly between adjacent crankshaft assemblies 1 for connecting the two. The first main shaft section 2 is fixed on the first mounting plate 11 in the first end crankshaft assembly 1, and the second main shaft section 3 is fixed on the second mounting plate 12 in the end crankshaft assembly 1. The axes of the first main shaft section 2 and the second main shaft section 3 are collinear.

[0026] In practical applications, crankshaft assembly 1 is first assembled, bearings are sleeved on the first support shaft 1101 and the second support shaft 1201 and fixed together by the first connecting assembly 13. Then, multiple crankshaft assemblies 1 are assembled together in sequence, and adjacent crankshaft assemblies 1 are fixed together by the second connecting assembly. The first main shaft section 2 is welded and fixed on the first crankshaft assembly 1, and the second main shaft section 3 is welded and fixed on the second crankshaft assembly 1.

[0027] In this embodiment, a first limiting shaft 1102 is fixed on the first support shaft 1101, and a first guide strip 1103 is fixed outside the first limiting shaft 1102. A first limiting hole 1202 adapted to the first limiting shaft 1102 is opened on the second support shaft 1201, and a first guide groove 1203 adapted to the first guide strip 1103 is opened on the hole wall of the first limiting hole 1202. The first connecting assembly 13 includes a connecting sleeve 131 and a connecting screw 132. A first limiting head 133 is fixed at one end of the connecting sleeve 131, and a second limiting head 134 is fixed at one end of the connecting screw 132. The first mounting plate 11 and the first support shaft 1101 have a first through hole 1 for the connecting sleeve 131 to pass through. 104. The second mounting plate 12 and the second support shaft 1201 have a second through hole 1204 for the connecting screw 132 to pass through, and the connecting sleeve 131 has a threaded hole 135 for threaded connection with the connecting screw 132. The first mounting plate 11 and the second mounting plate 12 are located between the first limiting head 133 and the second limiting head 134. The first limiting head 133 has a polygonal cross-section. The first mounting plate 11 has a first limiting groove 1105 adapted to the first limiting head 133. The second limiting head 134 has a circular cross-section. The second mounting plate 12 has a first clearance groove 1205 adapted to the second limiting head 134, and the second limiting head 134 has a hexagonal groove 136.

[0028] In a specific application, the bearing is sleeved on the outside of the second support shaft 1201, the first limiting shaft 1102 is inserted into the first limiting hole 1202, and the first guide strip 1103 is adapted to the first guide groove 1203. At this time, the bearing is sleeved on the outside of the first support shaft 1101 and the second support shaft 1201, and the connecting sleeve 131 is inserted into the first through hole 1104. The first limiting head 133 on the connecting sleeve 131 is located in the first limiting groove 1105. The connecting screw 132 is passed through the second through hole 1204 and connected to the threaded hole 135 in the connecting sleeve 131 to realize the connection and fixation between the first mounting plate 11 and the second mounting plate 12.

[0029] In this embodiment, the structure of the second connecting component is the same as that of the first connecting component 13. It is used to connect the second mounting plate 12 and the first mounting plate 11 in two adjacent crankshaft assemblies 1. A third support shaft 1206 is fixed on the side of the second mounting plate 12 facing the next crankshaft assembly 1. A fourth support shaft 1106 is fixed on the first mounting plate 11 in the next crankshaft assembly 1, corresponding to the third support shaft 1206. A second limiting shaft 1207 is fixed on the third support shaft 1206. A plurality of second guide strips 1208 are equidistantly spaced outside the second limiting shaft 1207. A second limiting hole 1110 adapted to the second limiting shaft 1207 is opened on the fourth support shaft 1106. The bore wall of 1110 has a second guide groove 1107 adapted to the second guide bar 1208 for adjusting the offset angle of two adjacent crankshaft assemblies 1. The second mounting plate 12 and the third support shaft 1206 are provided with a third through hole 1209 for the connecting sleeve 131 in the second connecting assembly to pass through. The second mounting plate 12 is also provided with a second limiting groove 1210 adapted to the first limiting head 133 in the second connecting assembly. The first mounting plate 11 and the fourth support shaft 1106 are provided with a fourth through hole 1108 for the connecting screw 132 in the second connecting assembly to pass through. The first mounting plate 11 is also provided with a second clearance groove 1109 adapted to the second limiting head 134 in the second connecting assembly.

[0030] In a specific application, the two assembled crankshaft assemblies 1 are assembled together, the second limiting shaft 1207 on the first set of second mounting plates 12 is inserted into the second limiting hole 1110 on the second set of first mounting plates 11, and the second mounting plate 12 and the first mounting plate 11 are fixed together by the second connecting component.

[0031] In all the solutions mentioned above, although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A composite crankshaft, characterized in that, It includes multiple crankshaft assemblies (1), a first main shaft section (2), and a second main shaft section (3), wherein, A crankshaft assembly (1), used to carry a bearing, includes a first mounting plate (11), a second mounting plate (12), and a first connecting assembly (13). A first support shaft (1101) is fixed on the first mounting plate (11), and a second support shaft (1201) is fixed on the second mounting plate (12). The bearing is sleeved on the first support shaft (1101) and the second support shaft (1201). The first mounting plate (11) and the second mounting plate (12) are connected by the first connecting assembly (13). There is a second connecting assembly between two adjacent crankshaft assemblies (1) for connecting the two. The first main shaft section (2) is fixed on the first mounting plate (11) in the first crankshaft assembly (1), and the second main shaft section (3) is fixed on the second mounting plate (12) in the end crankshaft assembly (1), and the axes of the first main shaft section (2) and the second main shaft section (3) are collinear.

2. A composite crankshaft according to claim 1, characterized in that, A first limiting shaft (1102) is fixed on the first support shaft (1101), and a first guide strip (1103) is fixed outside the first limiting shaft (1102). A first limiting hole (1202) adapted to the first limiting shaft (1102) is opened on the second support shaft (1201), and a first guide groove (1203) adapted to the first guide strip (1103) is opened on the hole wall of the first limiting hole (1202).

3. A composite crankshaft according to claim 2, characterized in that, The first connecting assembly (13) includes a connecting sleeve (131) and a connecting screw (132). One end of the connecting sleeve (131) is fixed with a first limiting head (133), and one end of the connecting screw (132) is fixed with a second limiting head (134). The first mounting plate (11) and the first support shaft (1101) have a first through hole (1104) through which the connecting sleeve (131) passes. The second mounting plate (12) and the second support shaft (1201) have a second through hole (1204) through which the connecting screw (132) passes. The connecting sleeve (131) is provided with a threaded hole (135) that is threadedly connected to the connecting screw (132). The first mounting plate (11) and the second mounting plate (12) are located between the first limiting head (133) and the second limiting head (134).

4. A composite crankshaft according to claim 3, characterized in that, The first limiting head (133) has a polygonal cross-section, and the first mounting plate (11) has a first limiting groove (1105) adapted to the first limiting head (133). The second limiting head (134) has a circular cross-section, and the second mounting plate (12) has a first clearance groove (1205) adapted to the second limiting head (134). The second limiting head (134) also has a hexagonal groove (136).

5. A composite crankshaft according to claim 4, characterized in that, The structure of the second connecting component is the same as that of the first connecting component (13), and it is used to connect the second mounting plate (12) and the first mounting plate (11) in two adjacent crankshaft assemblies (1).

6. A composite crankshaft according to claim 5, characterized in that, A third support shaft (1206) is fixed on one side of the second mounting plate (12), a fourth support shaft (1106) is fixed on the first mounting plate (11), a second limiting shaft (1207) is fixed on the third support shaft (1206), a plurality of second guide strips (1208) are provided at equal intervals outside the second limiting shaft (1207), a second limiting hole (1110) adapted to the second limiting shaft (1207) is opened on the fourth support shaft (1106), and a second guide groove (1107) adapted to the second guide strip (1208) is provided on the hole wall of the second limiting hole (1110).

7. A composite crankshaft according to claim 6, characterized in that, The second mounting plate (12) and the third support shaft (1206) are provided with a third through hole (1209) for the connecting sleeve (131) in the second connecting assembly to pass through. The second mounting plate (12) is also provided with a second limiting groove (1210) that is adapted to the first limiting head (133) in the second connecting assembly.

8. A composite crankshaft according to claim 7, characterized in that, The first mounting plate (11) and the fourth support shaft (1106) are provided with a fourth through hole (1108) for the connecting screw (132) in the second connecting assembly to pass through. The first mounting plate (11) is also provided with a second clearance groove (1109) that is adapted to the second limit head (134) in the second connecting assembly.

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