Camshaft structure capable of effectively reducing noise

Abstract

The utility model discloses a camshaft structure capable of effectively reducing noise, which comprises a camshaft main body, the front end of the camshaft main body is fixedly connected with a camshaft chain wheel, the outer side of the camshaft main body is fixedly connected with two cams, the inner sides of the two cams are both movably connected with tappets, and the tappets are fixedly connected with the camshaft main body. According to the cam shaft structure capable of effectively reducing the noise, the upper end of the lubricating block can be conveniently attached to the outer side of the rotating wheel all the time through cooperation between the telescopic column and the spring, friction between the rotating wheel and the lubricating block in the rotating process is achieved, the noise is reduced, and the noise is reduced. Therefore, a layer of lubricant always exists on the outer side of the rotating wheel and is accurately and continuously supplied to the inner side of the first sliding groove, the situation that lubrication is insufficient in the contact area of the rotating wheel and the first sliding groove in the operation process is prevented, and the problems of friction and noise are avoided.

Description

Technical Field

[0001] The utility model relates to the field of camshaft structures, in particular to a camshaft structure capable of effectively reducing noise. Background Art

[0002] In traditional engines and other equipment, the camshaft, as a key transmission component, is responsible for converting the rotational motion of the crankshaft into the reciprocating motion of the valves. During operation, the existing camshaft structure has relative motion between the camshaft and the tappet. This relative motion will generate greater friction in the absence of good lubrication. Friction will not only increase the wear of the components and shorten their service life, but also produce obvious noise.

[0003] The existing lubrication method for certain key parts of the camshaft is usually to deliver lubricating oil to various components on the camshaft through methods such as oil spray nozzles. However, for the friction areas on the camshaft, lubricating oil cannot be accurately and continuously supplied to these parts, which makes these areas more prone to insufficient lubrication during operation, resulting in more prominent friction and noise problems. To solve the above problems, we proposed a camshaft structure that effectively reduces noise. Summary of the Invention

[0004] The main purpose of the utility model is to provide a camshaft structure that effectively reduces noise, which can effectively solve the problems in the background technology.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A camshaft structure that effectively reduces noise includes a camshaft body, the front end of the camshaft body is fixedly connected to a camshaft sprocket, the outer side of the camshaft body is fixedly connected to two cams, the inner sides of the two cams are movably connected to tappets, the lower end of the tappet near the front end is fixedly connected to an intake valve, and the lower end of the tappet near the rear end is fixedly connected to an exhaust valve, and the lower ends of the intake valve and the exhaust valve are commonly connected to a piston.

[0007] Preferably, a first sliding groove is opened on the inner side of the cam, a mounting groove is opened on the upper end of the tappet, a rotating wheel is provided on the upper end of the tappet, the rotating wheel is rotatably connected to the inner side of the first sliding groove, and the rotating wheel is provided on the inner side of the mounting groove.

[0008] Preferably, two second slide grooves are opened on the inner side of the first slide groove, the outer side of the rotating wheel is rotatably connected to a limit rod, the limit rod is fixedly connected to the inner side of the tappet, and the two ends of the limit rod are respectively arranged on the inner sides of the two second slide grooves.

[0009] Preferably, a lubrication block is slidably connected to the inner side of the tappet, a slot is provided at the upper end of the lubrication block, and the rotating wheel is adapted to the slot.

[0010] Preferably, the front and rear ends of the lubrication block are fixedly connected with sliders, the front and rear ends of the inner side of the tappet are provided with third sliding grooves corresponding to the sliders, and the slider is slidably connected to the tappet through the third sliding grooves.

[0011] Preferably, the lower end of the lubricating block is fixedly connected to a telescopic column, the lower end of the telescopic column is fixedly connected to a tappet, a spring is sleeved on the outer side of the telescopic column, and the upper and lower ends of the spring are fixedly connected to the lubricating block and the tappet respectively.

[0012] Preferably, the rear end of the camshaft body is rotatably connected to a swivel seat, and the swivel seat is fixedly connected to the engine frame.

[0013] Compared with the prior art, the present invention has the following beneficial effects: a camshaft structure that effectively reduces noise, wherein the rotation of the camshaft body drives the two cams to rotate. At this time, the cooperation between the first slide groove opened on the inner side of the cam and the rotary wheel can conveniently realize that the cam drives the tappet to move up and down. At this time, the cooperation between the limit rod connected by rotation on the outer side of the rotary wheel and the two second slide grooves opened on the inner side of the first slide groove can conveniently realize further limiting of the tappet. At this time, the cooperation between the telescopic column and the spring can conveniently realize that the upper end of the lubricating block is always in contact with the outer side of the rotary wheel, so that the rotary wheel rubs against the lubricating block during the rotation process, so that a layer of lubricant can always exist on the outer side of the rotary wheel, and then be accurately and continuously supplied to the inner side of the first slide groove, preventing the contact area between the rotary wheel and the first slide groove from being insufficiently lubricated during operation, avoiding friction and noise problems, and the effect of use is better than the traditional method. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of a camshaft structure that effectively reduces noise in the utility model;

[0015] Figure 2 This is a partial structural cross-section of a camshaft structure that effectively reduces noise in this utility model. Figure 1 ;

[0016] Figure 3 This is a partial structural diagram of a camshaft structure that effectively reduces noise in the utility model;

[0017] Figure 4 This is a partial structural cross-section of a camshaft structure that effectively reduces noise in this utility model. Figure 2 ;

[0018] Figure 5This is an enlarged structural diagram of point A of a camshaft structure that effectively reduces noise in the present invention;

[0019] Figure 6 This is an enlarged structural diagram of point B of a camshaft structure that effectively reduces noise in the present invention.

[0020] In the figure: 1. Camshaft body; 2. Camshaft sprocket; 3. Cam; 4. Intake valve; 5. Exhaust valve; 6. Piston; 7. First slide; 8. Second slide; 9. Rotor; 10. Limit rod; 11. Lubricating block; 12. Telescopic column; 13. Spring; 14. Slider; 15. Third slide; 16. Slot; 17. Rotating seat; 18. Mounting slot; 19. Tappet. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0022] like Figure 1-6 As shown, a camshaft structure that effectively reduces noise includes a camshaft body 1, the front end of the camshaft body 1 is fixedly connected to a camshaft sprocket 2, the outer side of the camshaft body 1 is fixedly connected to two cams 3, the inner sides of the two cams 3 are movably connected to tappets 19, the lower end of the tappet 19 near the front end is fixedly connected to an intake valve 4, and the lower end of the tappet 19 near the rear end is fixedly connected to an exhaust valve 5, and the lower ends of the intake valve 4 and the exhaust valve 5 are commonly connected to a piston 6.

[0023] In this embodiment, a first sliding groove 7 is opened on the inner side of the cam 3, a mounting groove 18 is opened on the upper end of the tappet 19, and a rotating wheel 9 is provided on the upper end of the tappet 19. The rotating wheel 9 is rotatably connected to the inner side of the first sliding groove 7, and the rotating wheel 9 is provided on the inner side of the mounting groove 18.

[0024] Specifically, through the design of the mounting groove 18 , the runner 9 can be conveniently mounted on the upper end of the tappet 19 , and by providing the first sliding groove 7 on the inner side of the cam 3 , the runner 9 can be rotatably connected to the cam 3 through the first sliding groove 7 .

[0025] In this embodiment, two second slide grooves 8 are opened on the inner side of the first slide groove 7, and the outer side of the wheel 9 is rotatably connected to the limit rod 10. The limit rod 10 is fixedly connected to the inner side of the push rod 19, and the two ends of the limit rod 10 are respectively arranged on the inner side of the two second slide grooves 8.

[0026] Specifically, by cooperating between the limiting rod 10 rotatably connected to the outer side of the rotating wheel 9 and the two second sliding grooves 8 provided on the inner side of the first sliding groove 7, the cam 3 can conveniently further limit the tappet 19.

[0027] In this embodiment, the inner side of the tappet 19 is slidably connected to the lubricating block 11, and a slot 16 is provided at the upper end of the lubricating block 11. The runner 9 is adapted to the slot 16. The front and rear ends of the lubricating block 11 are fixedly connected to the slider 14. The inner side of the tappet 19 is provided with a third slot 15 corresponding to the slider 14. The slider 14 is slidably connected to the tappet 19 through the third slot 15.

[0028] Specifically, by providing a card slot 16 at the upper end of the lubricating block 11, the rotating wheel 9 can be always attached to the outer side of the upper end of the lubricating block 11 through the card slot 16, so that the rotating wheel 9 can rub against the lubricating block 11 during rotation, so that a layer of lubricant can always exist on the outer side of the rotating wheel 9. The cooperation between the slider 14 and the third slide groove 15 can improve the stability of the lubricating block 11 during movement.

[0029] In this embodiment, the lower end of the lubricating block 11 is fixedly connected to the telescopic column 12, the lower end of the telescopic column 12 is fixedly connected to the tappet 19, and a spring 13 is sleeved on the outer side of the telescopic column 12. The upper and lower ends of the spring 13 are fixedly connected to the lubricating block 11 and the tappet 19 respectively.

[0030] Specifically, through the cooperation between the telescopic column 12 and the spring 13 , the lubricating block 11 can be conveniently always attached to the outer side of the rotating wheel 9 .

[0031] In this embodiment, the rear end of the camshaft body 1 is rotatably connected to a swivel base 17 , and the swivel base 17 is fixedly connected to the engine frame.

[0032] Specifically, the swivel seat 17 is fixedly connected to the external frame of the engine. Through the design of the swivel seat 17, the stability of the camshaft body 1 during rotation can be conveniently improved.

[0033] It should be noted that the present invention is a camshaft structure that effectively reduces noise. The user first drives the camshaft sprocket 2 to rotate through an external transmission belt. The rotation of the camshaft sprocket 2 will drive the camshaft body 1 to rotate. The rotation of the camshaft body 1 will drive the two cams 3 to rotate. At this time, through the cooperation of the first slide groove 7 opened on the inner side of the cam 3 and the rotating wheel 9, the cam 3 can easily drive the tappet 19 to move up and down. At this time, between the limit rod 10 connected by the rotation outside of the rotating wheel 9 and the two second slide grooves 8 opened on the inner side of the first slide groove 7 With the cooperation, it is convenient to further limit the push rod 19. At this time, through the cooperation between the telescopic column 12 and the spring 13, it is convenient to ensure that the upper end of the lubricating block 11 is always in contact with the outer side of the runner 9, so that the runner 9 rubs against the lubricating block 11 during rotation, so that a layer of lubricant can always exist on the outer side of the runner 9, and then be accurately and continuously supplied to the inner side of the first slide groove 7, preventing the contact area between the runner 9 and the first slide groove 7 from being insufficiently lubricated during operation, avoiding friction and noise problems, and is more practical.

[0034] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A camshaft structure for effectively reducing noise, comprising a camshaft body (1), characterized in that: The front end of the camshaft body (1) is fixedly connected to a camshaft sprocket (2), the outer side of the camshaft body (1) is fixedly connected to two cams (3), the inner sides of the two cams (3) are movably connected to tappets (19), the lower end of the tappet (19) near the front end is fixedly connected to an intake valve (4), and the lower end of the tappet (19) near the rear end is fixedly connected to an exhaust valve (5), and the lower ends of the intake valve (4) and the exhaust valve (5) are commonly connected to a piston (6).

2. A camshaft structure for effectively reducing noise according to claim 1, characterized in that: A first sliding groove (7) is provided on the inner side of the cam (3), a mounting groove (18) is provided on the upper end of the tappet (19), a rotating wheel (9) is provided on the upper end of the tappet (19), the rotating wheel (9) is rotatably connected to the inner side of the first sliding groove (7), and the rotating wheel (9) is provided on the inner side of the mounting groove (18).

3. A camshaft structure for effectively reducing noise according to claim 2, characterized in that: Two second chute grooves (8) are provided on the inner side of the first chute (7), and the outer side of the rotating wheel (9) is rotatably connected to a limit rod (10). The limit rod (10) is fixedly connected to the inner side of the tappet (19), and the two ends of the limit rod (10) are respectively provided on the inner sides of the two second chute grooves (8).

4. The camshaft structure for effectively reducing noise according to claim 2, characterized in that: The inner side of the tappet (19) is slidably connected to a lubrication block (11), an upper end of the lubrication block (11) is provided with a clamping groove (16), and the rotating wheel (9) is adapted to the clamping groove (16).

5. The camshaft structure for effectively reducing noise according to claim 4, characterized in that: The front and rear ends of the lubricating block (11) are fixedly connected to a slider (14), and the front and rear ends of the inner side of the tappet (19) are provided with a third sliding groove (15) corresponding to the slider (14), and the slider (14) is slidably connected to the tappet (19) through the third sliding groove (15).

6. The camshaft structure for effectively reducing noise according to claim 4, characterized in that: The lower end of the lubricating block (11) is fixedly connected to a telescopic column (12), the lower end of the telescopic column (12) is fixedly connected to a tappet (19), a spring (13) is sleeved on the outer side of the telescopic column (12), and the upper and lower ends of the spring (13) are fixedly connected to the lubricating block (11) and the tappet (19), respectively.

7. The camshaft structure for effectively reducing noise according to claim 1, characterized in that: The rear end of the camshaft body (1) is rotatably connected to a rotating seat (17), and the rotating seat (17) is fixedly connected to the engine frame.

Images