Novel cam shaft

Abstract

The utility model discloses a novel cam shaft, relates to the technical field of automobile accessories, and solves the problems that when compression operation is carried out after an engine is started, the generated resistance is larger, the cam shaft is easy to rebound, the phenomena of equipment damage and the like are possibly caused, and the normal operation of the engine is not facilitated. A novel cam shaft comprises a cam body. The cam main body adopts a cylindrical structure; an upper connecting plate is fixedly arranged on the outer side of the top of the cam body. A pressure reducing valve is fixedly mounted on the outer side of the cam main body; a centrifugal rivet is fixedly arranged on one side of the top of the upper connecting plate; the outer side of the centrifugal rivet is rotationally sleeved with a centrifugal block, and the top of one end of the centrifugal block is provided with a through type circular through groove structure. In the process of compression exhaust operation during starting, pressure reduction and air leakage are carried out, so that resistance in the cylinder body is reduced, the phenomenon that a piston rebounds due to too large resistance is avoided, smooth starting operation of an engine is guaranteed, and the failure rate is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile accessories, and more specifically, particularly relates to a new camshaft. Background Art

[0002] The main body of the camshaft is a cylindrical rod with the same length as the cylinder group; it is covered with several cams to drive the valves; one end of the camshaft is the bearing support point, and the other end is connected to the drive wheel. Its function is to control the opening and closing of the valves.

[0003] The current camshaft still has the following shortcomings:

[0004] 1. The camshaft of a single-cylinder four-stroke engine is used for valve timing, and the gear and crankshaft are transmitted in a 1:2 ratio. The original camshaft gear material is PA66. When the high-speed variable frequency engine is running, it needs to withstand a high speed of 4000min to 5000min, so the PA66 is prone to gear damage during the transmission process. In addition, the original split PA66 material is easy to fall off due to thermal expansion when the engine oil temperature rises, affecting the starting performance and safety accidents.

[0005] 2. When the compression operation is performed after the engine is started, the resistance generated is large, and the camshaft is prone to rebound, which may cause damage to the equipment and is not conducive to the normal operation of the engine. Utility Model Content

[0006] In order to solve the above technical problems, the utility model provides a new camshaft to solve the problem raised in the above background technology that when the compression operation is performed after the engine is started, the resistance generated is large, the camshaft is prone to rebound, and may cause damage to the equipment, which is not conducive to the normal operation of the engine.

[0007] The purpose and effect of the new camshaft of the utility model are achieved by the following specific technical means:

[0008] A novel camshaft comprises: a cam body; the cam body is of cylindrical structure and is made of QT600-3 material; an upper connecting plate is fixedly arranged on the outer side of the top of the cam body; a pressure reducing valve is fixedly installed on the outer side of the cam body; a centrifugal rivet is fixedly arranged on one side of the top of the upper connecting plate; a centrifugal block is rotatably sleeved on the outer side of the centrifugal rivet, and a through-type circular through groove structure is opened on the top of one end of the centrifugal block.

[0009] Furthermore, an exhaust cam is rotatably provided on the upper outer portion of the cam body; an intake cam is rotatably provided on the lower outer portion of the cam body; and a lower connecting plate of a circular plate structure is fixedly provided on the outer bottom of the cam body.

[0010] Furthermore, a U-shaped groove structure is provided on the outer side of the centrifugal block.

[0011] Furthermore, a spring rivet is fixedly installed on the top of the upper connecting plate; a spring is rotatably arranged on the outer side of the spring rivet, and one end of the spring is fixedly connected to the circular through groove on one side of the centrifugal block.

[0012] Furthermore, a connecting shaft with a cylindrical structure is fixedly connected to the top end of the pressure reducing valve, and the connecting shaft is engaged with the slot.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] By optimizing the original camshaft gear material PA66 to the integral material QT600-3, the strength of this product can be greatly improved, avoiding the problem of damage during use, and being able to withstand use under higher speed conditions. At the same time, this device uses an integrated structure, which can be started more easily under low or high temperature conditions, ensuring the performance of the engine and improving the overall reliability of the engine.

[0015] By setting up a corresponding pressure reducing valve and pressure reducing mechanism, the pressure can be reduced and the air can be released simultaneously during the compression and exhaust operation at startup, thereby reducing the resistance in the cylinder and avoiding the rebound of the piston due to excessive resistance, further ensuring the smooth starting and operation of the engine and helping to reduce the failure rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the connection structure of the cam body of the utility model in a partial cross-sectional state.

[0017] Figure 2 It is a schematic diagram of the overall top view structure of the utility model.

[0018] Figure 3 It is a schematic structural diagram of the exhaust cam and the intake cam in the utility model in connection state.

[0019] Figure 4 It is a schematic diagram of the side structure of the pressure reducing valve of the utility model.

[0020] Figure 5 It is a schematic diagram of the structure of the pressure reducing valve of the utility model from a top view.

[0021] Figure 6 It is a schematic diagram of the top view structure of the centrifugal block of the utility model.

[0022] Figure 7 It is a side structural schematic diagram of the centrifugal block of the utility model.

[0023] Figure 8It is a schematic diagram of the spring structure from top view of the utility model.

[0024] Fig. 9 It is a schematic diagram of the spring side structure of the utility model.

[0025] In the figure, the corresponding relationship between the component names and the figure numbers is as follows:

[0026] 1. Cam body; 101. Exhaust cam; 102. Intake cam; 103. Upper connecting plate; 104. Lower connecting plate; 2. Centrifugal block; 201. Slot; 3. Spring; 4. Pressure reducing valve; 401. Connecting shaft; 5. Centrifugal rivet; 6. Spring rivet. DETAILED DESCRIPTION

[0027] The implementation of the utility model is further described in detail below in conjunction with the drawings and examples.

[0028] Example:

[0029] As attached Figure 1 To Attachment Fig. 9 As shown:

[0030] The utility model provides a novel camshaft, comprising: a cam body 1; the cam body 1 adopts a cylindrical structure, and the cam body 1 is made of QT600-3 material; an upper connecting plate 103 is fixedly arranged on the outer side of the top of the cam body 1; a pressure reducing valve 4 is fixedly installed on the outer side of the cam body 1; a centrifugal rivet 5 is fixedly arranged on one side of the top of the upper connecting plate 103; a centrifugal block 2 is rotatably sleeved on the outer side of the centrifugal rivet 5, and a through-type circular through groove structure is opened on the top of one end of the centrifugal block 2.

[0031] An exhaust cam 101 is rotatably provided on the upper outer portion of the cam body 1 ; an intake cam 102 is rotatably provided on the lower outer portion of the cam body 1 ; and a lower connecting plate 104 of a circular plate structure is fixedly provided on the outer bottom of the cam body 1 .

[0032] A U-shaped slot 201 is provided on the outer side of the centrifugal block 2 .

[0033] A spring rivet 6 is fixedly installed on the top of the upper connecting plate 103 ; a spring 3 is rotatably arranged on the outer side of the spring rivet 6 , and one end of the spring 3 is fixedly connected to a circular through groove on one side of the centrifugal block 2 .

[0034] A connecting shaft 401 with a cylindrical structure is fixedly connected to the top of the pressure reducing valve 4 , and the connecting shaft 401 is engaged with the slot 201 .

[0035] The specific usage and function of this embodiment are as follows:

[0036] In the utility model, during the rotation of the cam body 1, the exhaust cam 101 and the intake cam 102 are synchronously driven to rotate, the exhaust cam 101 drives the valve to perform exhaust action, and the intake cam 102 drives the valve to perform intake action. When the cam body 1 starts to rotate, the centrifugal force generated drives the free end of the centrifugal block 2 to be thrown outward around the centrifugal rivet 5. In this process, the free end of the centrifugal block 2 is pulled and limited by the spring 3 to limit the amplitude of the centrifugal block 2 being thrown out. At the same time, the position of the spring 3 is limited by the spring rivet 6. When the centrifugal block 2 is thrown out, the pressure reducing valve 4 can be driven to open through the cooperation of the slot 201 and the connecting shaft 401, thereby reducing the resistance in the process of compressing and exhausting, avoiding the rebound phenomenon, and ensuring the normal operation of the engine.

Claims

1. A new camshaft, characterized in that: include: A cam body (1); the cam body (1) is of cylindrical structure and is made of QT600-3 material; an upper connecting plate (103) is fixedly arranged on the outer side of the top of the cam body (1); a pressure reducing valve (4) is fixedly installed on the outer side of the cam body (1); a centrifugal rivet (5) is fixedly arranged on one side of the top of the upper connecting plate (103); a centrifugal block (2) is rotatably sleeved on the outer side of the centrifugal rivet (5), and a through-type circular through groove structure is opened on the top of one end of the centrifugal block (2).

2. A new camshaft as claimed in claim 1, characterized in that: An exhaust cam (101) is rotatably arranged on the upper outer portion of the cam body (1); and an intake cam (102) is rotatably arranged on the lower outer portion of the cam body (1).

3. A new camshaft as claimed in claim 1, characterized in that: A lower connecting plate (104) with a circular plate structure is fixedly arranged on the outer side of the bottom of the cam body (1).

4. A new camshaft as claimed in claim 1, characterized in that: A clamping groove (201) with a U-shaped groove structure is provided on the outer side of the centrifugal block (2).

5. A new camshaft as claimed in claim 1, characterized in that: A spring rivet (6) is fixedly installed on the top of the upper connecting plate (103); a spring (3) is rotatably arranged on the outer side of the spring rivet (6), and one end of the spring (3) is fixedly connected to a circular through groove on one side of the centrifugal block (2).

6. A new type of camshaft as claimed in claim 1, characterized in that: A connecting shaft (401) with a cylindrical structure is fixedly connected to the top end of the pressure reducing valve (4), and the connecting shaft (401) is engaged and connected with the clamping groove (201).

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