Cam shaft convenient to assemble

Abstract

The utility model relates to the technical field of cam shafts, in particular to a cam shaft convenient to assemble, which comprises a cam shaft main shaft, a plurality of cams are arranged on the outer wall of the cam shaft main shaft, and a connecting device convenient to assemble the cam shaft is arranged on the outer wall of the cam shaft main shaft. The fixing block on the cylindrical block is connected with the groove in the engine shell, the cam shaft can be preliminarily fixed, then a screw penetrates through the first threaded pipe on the fixing block to be connected with the engine shell, the fixing block is fixed in the engine shell, the position of the cam shaft can be determined, and rotation of the cam shaft cannot be affected; then the connecting plates are installed on the two sides of the main shaft of the cam shaft, the cam shaft is fixed, the connecting grooves in the gear are aligned with the supporting columns on the connecting blocks to be inserted into the supporting columns, then the gear is connected with the second threaded pipes in the supporting columns through the fastening screws, the gear is fixed to the main shaft of the cam shaft, and the situation that assembly of the cam shaft is tedious is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of camshafts, and particularly relates to a camshaft which is convenient to assemble. Background Art

[0002] A camshaft is a component in a piston engine. Its function is to control the opening and closing actions of the valves. Although the rotational speed of the camshaft in a four-stroke engine is half of that of the crankshaft, generally its rotational speed is still very high, and it needs to bear a large torque. Therefore, in the design, the requirements for the camshaft in terms of strength and support are very high, and its material is generally high-quality alloy steel or alloy steel. Since the valve motion law is related to the power and operating characteristics of an engine, the design of the camshaft occupies a very important position in the design process of the engine.

[0003] The prior art has the following deficiencies: Currently, the assembly of the camshaft is usually fixed by the cooperation of multiple groups of connecting plates and fastening bolts. Since the installation of the connecting plates also has an order, the assembly is relatively cumbersome, often taking a lot of time in the assembly of the camshaft, which is not conducive to the production and assembly of the engine and delays the production efficiency. And for some simple assembly structures, there are problems with connection stability. If the connection of the camshaft is not stable enough, it will directly affect the operation of the engine.

[0004] Therefore, it is very necessary to invent a camshaft that is convenient to assemble. Summary of the Invention

[0005] For this purpose, the utility model provides a camshaft that is convenient to assemble. By connecting the fixing blocks on the cylindrical block with the grooves inside the engine housing, the camshaft can be preliminarily fixed. Then, the screws pass through the first threaded pipes on the fixing blocks and are connected to the engine housing, so that the fixing blocks are fixed inside the engine housing, which can determine the position of the camshaft and does not affect the rotation of the camshaft. Then, the connecting plates are installed on both sides of the main shaft of the camshaft to fix the camshaft. The connecting grooves on the gear are aligned with the support columns on the connecting block and inserted, and then the fastening screws are connected with the second threaded pipes inside the support columns, so that the gear is fixed on the main shaft of the camshaft. The gear is meshed and connected with an external driving device, so that the rotation of the gear can drive the rotation of the main shaft of the camshaft to solve the problem that the assembly of the camshaft is relatively cumbersome.

[0006] To achieve the above object, the utility model provides the following technical solution: A camshaft that is convenient to assemble, including a main shaft of the camshaft, wherein a plurality of cams are installed on the outer wall of the main shaft of the camshaft, and a connecting device for facilitating the assembly of the camshaft is installed on the outer wall of the main shaft of the camshaft.

[0007] Preferably, the connecting device includes ball bearings. The outer wall of the main shaft of the camshaft is symmetrically provided with a first annular groove, and the inner wall of the first annular groove is provided with ball bearings, and there are several ball bearings.

[0008] Preferably, the connecting device includes a cylindrical block. The outer wall of the main shaft of the camshaft is rotatably installed with a cylindrical block. The inner wall of the cylindrical block is provided with a cylindrical groove, and the inner wall of the cylindrical groove is symmetrically provided with a second annular groove.

[0009] Preferably, the connecting device includes a fixing block. The outer wall of the cylindrical block is symmetrically installed with fixing blocks, and the inner walls of the fixing blocks are provided with first threaded pipes.

[0010] Preferably, the connecting device includes support columns. The outer wall of the main shaft of the camshaft is fixedly installed with a connecting block, and the outer wall of the connecting block is symmetrically installed with support columns, and there are four support columns.

[0011] Preferably, the connecting device includes a second threaded pipe. The inner wall of the support column is provided with a second threaded pipe, and a rubber ring is installed on the outer wall of the support column.

[0012] Preferably, the connecting device includes a connecting groove. The outer wall of the connecting block is provided with a gear. The inner wall of the gear is symmetrically provided with connecting grooves, and there are four connecting grooves. The inner walls of the connecting grooves are provided with fastening screws, and the outer surface of the fastening screws is threadedly connected to the second threaded pipe.

[0013] The beneficial effects of the present invention are as follows:

[0014] By installing a first annular groove, ball bearings, a cylindrical block, a second annular groove, a fixing block, a first threaded pipe, support columns, a second threaded pipe, a rubber ring, a gear, and a connecting groove, the present invention connects the fixing block on the cylindrical block to the groove inside the engine housing, which can initially fix the camshaft. Then, by passing a screw through the first threaded pipe on the fixing block and connecting it to the engine housing, the fixing block can be fixed inside the engine housing, which can determine the position of the camshaft and does not affect the rotation of the camshaft. Then, the connecting plates are installed on both sides of the main shaft of the camshaft to fix the camshaft. Align the connecting grooves on the gear with the support columns on the connecting block and insert them, and then connect the gear to the second threaded pipe inside the support column through the fastening screw, so that the gear is fixed on the main shaft of the camshaft. The gear is meshed and connected with an external driving device, so that the rotation of the gear can drive the rotation of the main shaft of the camshaft, avoiding the cumbersome assembly of the camshaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic side view structure provided by the present invention;

[0016] Figure 2Schematic diagram of the side part structure provided by the present utility model;

[0017] Figure 3 Schematic diagram of the side structure of the gear provided by the present utility model;

[0018] Figure 4 Schematic diagram of the overall structure of the cylindrical block provided by the present utility model;

[0019] Figure 5 Schematic diagram of the overall structure of the gear provided by the present utility model;

[0020] Figure 6 Schematic diagram of the front structure of the connecting block provided by the present utility model.

[0021] In the figure: 1. Camshaft main shaft; 101. Cam; 2. First annular groove; 201. Ball; 3. Cylindrical block; 301. Cylindrical groove; 302. Second annular groove; 4. Fixed block; 401. First threaded pipe; 5. Connecting block; 501. Support column; 6. Second threaded pipe; 601. Rubber ring; 7. Gear; 701. Connecting groove; 702. Fastening screw. Embodiment

[0022] The following is a description of the preferred embodiments of the present utility model with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only for the purpose of illustrating and explaining the present utility model, and are not used to limit the present utility model.

[0023] Refer to the appendix Figures 1-6, A camshaft that is convenient to assemble, including a camshaft main shaft 1. The outer wall of the camshaft main shaft 1 is installed with cams 101, and there are several cams 101. The outer wall of the camshaft main shaft 1 is symmetrically provided with a first annular groove 2. The inner wall of the first annular groove 2 is installed with balls 201, and there are several balls 201. The balls 201 are filled in the first annular groove 2 on the camshaft main shaft 1 and can roll in the first annular groove 2 on the camshaft main shaft 1. The balls 201 are sandwiched between the first annular groove 2 on the camshaft main shaft 1 and the second annular groove 302 on the cylindrical block 3, making the cylindrical block 3 rotate more stably on the camshaft main shaft 1. The outer wall of the camshaft main shaft 1 is rotatably installed with a cylindrical block 3. The inner wall of the cylindrical block 3 is provided with a cylindrical groove 301. The inside of the cylindrical groove 301 on the cylindrical block 3 is more convex on both sides and more concave in the middle, which is exactly the opposite of the connection with the outer surface of the camshaft main shaft 1. Under the action of the balls 201, the cylindrical block 3 can rotate more stably. The inner wall of the cylindrical groove 301 is symmetrically provided with a second annular groove 302. The outer wall of the cylindrical block 3 is symmetrically installed with fixing blocks 4. The fixing blocks 4 are connected to the grooves inside the engine housing, which can initially fix the camshaft and facilitate subsequent fixing. The inner wall of the fixing block 4 is provided with a first threaded tube 401. By using screws to fix the fixing block 4 inside the engine housing, the position of the camshaft can be determined without affecting the rotation of the camshaft. The outer wall of the camshaft main shaft 1 is fixedly installed with a connecting block 5. The outer wall of the connecting block 5 is symmetrically installed with support columns 501, and there are four support columns 501. In the existing camshaft main shaft 1 and the gear 7 are both integral structures, resulting in the center of gravity of the camshaft not being in the central position. Therefore, the assembly is also relatively difficult. By connecting the support columns 501 with the gear 7, the gear 7 can be installed after the camshaft is fixed, making its installation more convenient. The inner wall of the support column 501 is provided with a second threaded tube 6. The outer wall of the support column 501 is installed with a rubber ring 601. The rubber ring 601 can protect the inner walls of the support column 501 and the connecting groove 701. Because the rapid rotation of the gear 7 will drive the rapid rotation of the camshaft main shaft 1, if there is no isolation of the rubber ring 601 between the support column 501 on the connecting block 5 and the inner wall of the connecting groove 701, then collisions will occur, making the installation of the gear 7 and the connecting block 5 relatively loose and affecting the rotation of the camshaft. The outer wall of the connecting block 5 is installed with a gear 7. The inner wall of the gear 7 is symmetrically provided with connecting grooves 701, and there are four connecting grooves 701. The positions of the connecting grooves 701 on the gear 7 correspond to the positions of the support columns 501 on the connecting block 5. Then, through the fastening screws 702 connected to the second threaded tube 6 inside the support column 501, the gear 7 is fixed on the camshaft main shaft 1. The gear 7 is meshed and connected with an external driving device, so that the rotation of the gear 7 can drive the rotation of the camshaft main shaft 1. The inner wall of the connecting groove 701 is installed with fastening screws 702, and the outer surface of the fastening screws 702 is threadedly connected to the second threaded tube 6.Connect the fixing block 4 on the cylindrical block 3 with the groove inside the engine housing, which can preliminarily fix the camshaft. Then, pass a screw through the first threaded tube 401 on the fixing block 4 and connect it with the engine housing, so that the fixing block 4 is fixed inside the engine housing, which can determine the position of the camshaft and will not affect the rotation of the camshaft. Then, install the connecting plate on both sides of the camshaft main shaft 1 to fix the camshaft. Align the connecting groove 701 on the gear 7 with the support column 501 on the connecting block 5 and insert it. Then, connect it with the second threaded tube 6 inside the support column 501 through the fastening screw 702, so that the gear 7 is fixed on the camshaft main shaft 1. The gear 7 is meshed and connected with an external driving device, so that the rotation of the gear 7 can drive the rotation of the camshaft main shaft 1, avoiding the cumbersome situation of camshaft assembly.

[0024] The use process of the present utility model is as follows: Those skilled in the art connect the fixing block 4 on the cylindrical block 3 with the groove inside the engine housing, which can preliminarily fix the camshaft. Then, pass a screw through the first threaded tube 401 on the fixing block 4 and connect it with the engine housing, so that the fixing block 4 is fixed inside the engine housing, which can determine the position of the camshaft and will not affect the rotation of the camshaft. Then, install the connecting plate on both sides of the camshaft main shaft 1 to fix the camshaft. Align the connecting groove 701 on the gear 7 with the support column 501 on the connecting block 5 and insert it. Then, connect it with the second threaded tube 6 inside the support column 501 through the fastening screw 702, so that the gear 7 is fixed on the camshaft main shaft 1. The gear 7 is meshed and connected with an external driving device, so that the rotation of the gear 7 can drive the rotation of the camshaft main shaft 1, avoiding the cumbersome situation of camshaft assembly.

[0025] The above are only the preferred embodiments of the present utility model. Any person skilled in the art may modify the present utility model by using the technical solutions described above or modify it into an equivalent technical solution. Therefore, any simple modification or equivalent replacement made according to the technical solutions of the present utility model falls within the scope of protection required by the present utility model.

Claims

1. A camshaft that is convenient to assemble, comprising a camshaft main shaft (1), characterized in that: The outer wall of the camshaft main shaft (1) is provided with cams (101), and there are several cams (101). The outer wall of the camshaft main shaft (1) is provided with a connecting device for facilitating the assembly of the camshaft. The connecting device includes balls (201). The outer wall of the camshaft main shaft (1) is symmetrically provided with first annular grooves (2). The inner wall of the first annular grooves (2) is provided with balls (201), and there are several balls (201). The connecting device includes a cylindrical block (3). The outer wall of the camshaft main shaft (1) is rotatably provided with a cylindrical block (3). The inner wall of the cylindrical block (3) is provided with a cylindrical groove (301). The inner wall of the cylindrical groove (301) is symmetrically provided with second annular grooves (302). The connecting device includes a fixing block (4). The outer wall of the cylindrical block (3) is symmetrically provided with fixing blocks (4). The inner wall of the fixing blocks (4) is provided with first threaded pipes (401). The connecting device includes support columns (501). The outer wall of the camshaft main shaft (1) is fixedly provided with a connecting block (5). The outer wall of the connecting block (5) is symmetrically provided with support columns (501), and there are four support columns (501). The connecting device includes second threaded pipes (6). The inner wall of the support columns (501) is provided with second threaded pipes (6). The outer wall of the support columns (501) is provided with rubber rings (601). The connecting device includes connecting grooves (701). The outer wall of the connecting block (5) is provided with a gear (7). The inner wall of the gear (7) is symmetrically provided with connecting grooves (701), and there are four connecting grooves (701). The inner wall of the connecting grooves (701) is provided with fastening screws (702), and the outer surface of the fastening screws (702) is threadedly connected to the second threaded pipes (6).

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