CN203022834U

CN203022834U - Hollow cam shaft

Info

Publication number: CN203022834U
Application number: CN2013200128472U
Authority: CN
Inventors: 单炯毅; 张锐; 郎伟钦
Original assignee: Pan Asia Technical Automotive Center Co Ltd; Shanghai General Motors Co Ltd
Current assignee: SAIC General Motors Corp Ltd; Pan Asia Technical Automotive Center Co Ltd
Priority date: 2013-01-10
Filing date: 2013-01-10
Publication date: 2013-06-26
Anticipated expiration: 2023-01-10

Abstract

The technical scheme of the utility model is to provide a hollow cam shaft. The hollow cam shaft comprises a shaft body, a first bearing and a second bearing; a first oil channel is positioned in the center of the shaft body; a first oil inlet hole communicated with the first oil channel is formed in the first bearing; an oil outlet hole communicated with the first oil channel is formed in the second bearing; a driving head is connected with one end of the shaft body, close to the second bearing; and a through hole communicated with the first oil channel is formed in the middle of the driving head. According to the hollow cam shaft, the driving head is connected to one end of the hollow cam shaft, the oil channel can be used for supplying oil for lubricating the bearing, as well as providing lubricating oil to a driven part through the through hole in the driving head; and the hollow cam shaft is simple in structure and has various functions.

Description

A kind of hollow camshaft

Technical field

The utility model relates to part of automobile engine, relates in particular to a kind of hollow camshaft.

Background technique

Existing camshaft changes rotatablely moving of camshaft into valve pump by cam, and control is advanced, the switching of hollow door, with the work by combustion process in this control engine cylinder.Therefore, the performance of camshaft has directly affected the power character of motor, oil consumption and discharging.

As shown in Figure 1A-1B, be existing a kind of camshaft.The axis body hollow of this camshaft, the axis body two ends by screw thread 7 ' and steel ball 8 ' sealing, are drilled with a plurality of oilholes (1 '-5 ') respectively on camshaft bearing, during operation high-pressure oil from oilhole 1 ' enter oil duct 6 ', respectively from oilhole 2 '-5 ' outflow, lubricating bearings.After adopting this structure, lubricating between camshaft and bearing completed by camshaft, need not to design oilhole on the cylinder cap (not shown) that is located at the camshaft periphery, reduced design difficulty and the processing cost of cylinder cap.

Designing requirement due to motor, some camshaft need to be completed more function, as shown in Fig. 2 A-2B, be another kind of camshaft, camshaft integral body is solid construction, tail end be equipped with hexagonal driving head 10 ', braking provides vacuum servo take driving device formula vacuum pump (not shown) as car load.Due to vacuum pump itself need lubricated, therefore from the end bearing of camshaft processed oilhole 9 ', introduce the through hole 11 of machine oil by driving head 10 ' centre ' oil is imported in vacuum pump from the cylinder cap bearing, thus to the vacuum pump fuel feeding.Camshaft bearing journal lubricated needs from the cylinder cap punching that is located at the camshaft periphery, lubricant oil to be imported bearing, and this way has increased the complexity of cylinder cap design undoubtedly.

The parts that can not drive other although the hollow oilhole has been adopted in the design of existing the first camshaft are realized more function, and the second camshaft does not have central oilhole from cylinder cap for oil-lubricated bearing, to have increased the design complexity of cylinder cap.

The model utility content

The purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of hollow camshaft of simple in structure, diverse in function is provided.

The technical solution of the utility model provides a kind of hollow camshaft, comprise axis body, clutch shaft bearing and the second bearing, the center of described axis body is provided with the first oil duct, described clutch shaft bearing is provided with the first oil inlet hole that communicates with described the first oil duct, described the second bearing is provided with the oil outlet that communicates with described the first oil duct, an end near described the second bearing on described axis body connects a driving head, offers the through hole that communicates with described the first oil duct in the middle of described driving head.

Preferably, on the circumferential surface of described clutch shaft bearing, even compartment of terrain is distributed with a plurality of described the first oil inlet holes.

Preferably, the circumferential surface of described the second bearing is provided with a described oil outlet.

Preferably, described driving head is arranged with the angle signal wheel outward.

Preferably, the end of described driving head offers for the in-line groove that drives vacuum pump, offers the circular trough that communicates with described through hole in the middle of described in-line groove.

Preferably, the oil filter screen of disc-shaped is installed between described axis body and described driving head, described oil filter screen comprises the skeleton and the mesh grid that is arranged in described skeleton of ring.

Preferably, the other end of described axis body is threaded connection the 3rd bearing, the center of described the 3rd bearing is provided with the second oil duct, and the circumferential surface of described the 3rd bearing is provided with the first oil groove, offers the second oil inlet hole that communicates with described the second oil duct in described the first oil groove.

Preferably, also be provided with the second oil groove on described the 3rd bearing, even spaced apart a plurality of the 3rd oil inlet holes that are provided with on described the second oil groove, a plurality of described the 3rd oil inlet holes communicate with corresponding the 3rd oil duct respectively, and many described the 3rd oil ducts are parallel with described the second oil duct and distribute around described the second oil duct.

After adopting technique scheme, has following beneficial effect: because the end at hollow camshaft is connected with driving head, oil duct can be given the lubrication oil supply of bearing, also can provide lubricant oil for driven parts, simple in structure, diverse in function by the through hole of driving head simultaneously.

Description of drawings

Figure 1A is the structural representation of existing a kind of camshaft;

Figure 1B is the sectional view of existing a kind of camshaft;

Fig. 2 A is the structural representation of existing another kind of camshaft;

Fig. 2 B is the sectional view of existing another kind of camshaft;

Fig. 3 is the structural representation of hollow camshaft in the utility model one embodiment;

Fig. 4 is the partial structurtes schematic diagram of hollow camshaft in the utility model one embodiment;

Fig. 5 is the partial exploded view of hollow camshaft in the utility model one embodiment;

Fig. 6 is the structural representation of oil filter screen in the utility model one embodiment;

Fig. 7 is the partial sectional view of hollow camshaft in the utility model one embodiment;

Fig. 8 is the sectional view of hollow camshaft in the utility model one embodiment;

Fig. 9 is the structural representation after in the utility model one embodiment, hollow camshaft and cover cap are installed.

The reference character table of comparisons:

1 '---oilhole 2 '---oilhole 3 '---oilhole

4 '---oilhole 5 '---oilhole 6 '---oil duct

7 '---screw thread 8 '---steel ball 9 '---oilhole

10 '---driving head 11 '---through holes

1---clutch shaft bearing 2---second bearing 3---the 3rd bearing

4---axis body 5---driving head 6---vacuum pumps

7---phase regulator 8---cover cap 9---oil filter screens

11---the first oil inlet hole 21---oil outlet 31---the second oil ducts

32---the first oil groove 33---second oil inlet hole 34---the second oil grooves

35---the 3rd oil inlet hole 36---the 3rd oil duct 41---the first oil ducts

42---screw thread 43---mounting groove 51---through holes

52---angle signal wheel 53---in-line groove 54---circular troughs

91---skeleton 92---mesh grid

Embodiment

Further illustrate embodiment of the present utility model below in conjunction with accompanying drawing.

As shown in Figure 3, hollow camshaft comprises axis body 4, clutch shaft bearing 1 and the second bearing 2, the center of axis body 4 is provided with the first oil duct 41, clutch shaft bearing 1 is provided with the first oil duct 41(referring to shown in Fig. 7-8) the first oil inlet hole 11 of communicating, the second bearing 2 is provided with the oil outlet 21 that communicates with the first oil duct 41, an end near the second bearing 2 on axis body 4 connects a driving head 5, offers the through hole 51 that communicates with the first oil duct 41 in the middle of driving head 5.

After lubricant oil entered from the first oil inlet hole 11, as shown in Figure 7, the direction of black arrow was the flow direction of lubricant oil.At first lubricant oil flow out from oil outlet 21, is used for lubricated the second bearing 2.And then flow out from through hole 51, be used for the lubricated vacuum pump 6 that is connected with driving head 5.In the present embodiment, hollow camshaft can be by lubricated the second bearing 2 of the first oil duct 41, need to be at cover cap 8(not as shown in Figure 9) upper punching imports to the second bearing 2 places with lubricant oil, and is simple in structure.One end of hollow camshaft is connected with driving head 5, can drive vacuum pump 6 equipment such as grade, can realize more function.

Preferably, as shown in Figure 3, on the circumferential surface of clutch shaft bearing 1, even compartment of terrain is distributed with a plurality of the first oil inlet holes 11, can be 3 or 4.A plurality of the first oil inlet holes 11 can make more lubricant oil enter into the first oil duct 41, satisfy the lubrication to the second bearing 2 and vacuum pump 6.

Preferably, as shown in Figure 3, the circumferential surface of the second bearing 2 is provided with an oil outlet 21.The second a small amount of lubricant oil of 2, bearing needs just can satisfy lubricating requirement, if oil outlet 21 is too much, will cause unnecessary oil to leak, and causes waste, and can reduce engine oil pressure, the fuel feeding of impact to vacuum pump 6.

Preferably, as shown in Fig. 4-5, the outer angle signal wheel 52 that is arranged with of driving head 5.Angle signal wheel 52 orientation of being convenient to observe in driving head 5 rotation processes.

Preferably, as shown in Figure 4, the end of driving head 5 offers for the in-line groove 53 that drives vacuum pump 6, offers the circular trough 54 that communicates with through hole 51 in the middle of in-line groove 53.In-line groove 53 matches with parts on vacuum pump 6, is used for driving vacuum pump 6.Circular trough 54 is used for coupling through hole 51, is convenient to lubricant oil and flow in vacuum pump 6.

Preferably, as shown in Fig. 5-6, the oil filter screen 9 of disc-shaped is installed between axis body 4 and driving head 5, oil filter screen 9 comprises the skeleton 91 and the mesh grid 92 that is arranged in skeleton 91 of ring.Oil filter screen 9 is used for filtering the impurity of machine oil, prevents from entering into vacuum pump 6, affects the operation of vacuum pump 6.Skeleton 91 can be nylon 66(PA66) to make, the Stainless Steel Wire braiding that mesh grid 92 can be diameter 0.3mm forms.As shown in Figure 7, during installation, at first oil filter screen 9 is put in the mounting groove 43 of camshaft one end formation, then driving head 5 is inserted in mounting groove 43.The degree of depth of mounting groove 43 is slightly long than the length that driving head 5 inserts, and reserves suitable space mounting oil filter screen 9, and oil filter screen 9 can not damaged by pressure for driven 5, can be in mounting groove 43 yet the left and right play.

Preferably, as shown in Figure 8, the other end of axis body 4 connects the 3rd bearing 3 by screw thread 42, the center of the 3rd bearing 3 is provided with the second oil duct 31, the circumferential surface of the 3rd bearing 3 is provided with the first oil groove 32, offer the second oil inlet hole 33 that communicates with the second oil duct 31 in the first oil groove 32, screw thread 42 is with the first oil duct 41 and the second oil duct 31 isolation.In Fig. 8, the direction of black arrow indication is the flow direction of lubricant oil.The A oil circuit of lubricant oil in the 3rd bearing 3 is pooled to the second oil duct 31 from a plurality of the second oil inlet holes 33, because the end of the 3rd bearing 3 is shown in Figure 9 for connecting phase regulator 7(), lubricant oil flow in phase regulator 7 from the second oil duct 31 again and is lubricated.

Preferably, as shown in Figure 8, also be provided with the second oil groove 34 on the 3rd bearing 3, even spaced apart a plurality of the 3rd oil inlet holes 35 (as shown in Figure 9) that are provided with on the second oil groove 34, a plurality of the 3rd oil inlet holes 35 communicate with corresponding the 3rd oil duct 36 respectively, and many articles of the 3rd oil ducts 36 are parallel with the second oil duct 31 and distribute around the second oil duct 31.The B oil circuit of lubricant oil in the 3rd bearing 3 enters from a plurality of the 3rd oil inlet holes 35, flow into respectively in many articles of the 3rd oil ducts 36, then enters phase regulator 7 from the 3rd oil duct 36.

Above-described is only principle of the present utility model and preferred embodiment.Should be pointed out that for the person of ordinary skill of the art, on the basis of the utility model principle, can also make some other modification, also should be considered as protection domain of the present utility model.

Claims

1. hollow camshaft, comprise axis body, clutch shaft bearing and the second bearing, the center of described axis body is provided with the first oil duct, described clutch shaft bearing is provided with the first oil inlet hole that communicates with described the first oil duct, described the second bearing is provided with the oil outlet that communicates with described the first oil duct, it is characterized in that, the end near described the second bearing on described axis body connects a driving head, offers the through hole that communicates with described the first oil duct in the middle of described driving head.

2. hollow camshaft according to claim 1, is characterized in that, on the circumferential surface of described clutch shaft bearing, even compartment of terrain is distributed with a plurality of described the first oil inlet holes.

3. hollow camshaft according to claim 1, is characterized in that, the circumferential surface of described the second bearing is provided with a described oil outlet.

4. hollow camshaft according to claim 1, is characterized in that, described driving head is arranged with the angle signal wheel outward.

5. hollow camshaft according to claim 1, is characterized in that, the end of described driving head offers for the in-line groove that drives vacuum pump, offers the circular trough that communicates with described through hole in the middle of described in-line groove.

6. hollow camshaft according to claim 1, is characterized in that, the oil filter screen of disc-shaped is installed between described axis body and described driving head, and described oil filter screen comprises the skeleton and the mesh grid that is arranged in described skeleton of ring.

7. hollow camshaft according to claim 1, it is characterized in that, the other end of described axis body is threaded connection the 3rd bearing, the center of described the 3rd bearing is provided with the second oil duct, the circumferential surface of described the 3rd bearing is provided with the first oil groove, offers the second oil inlet hole that communicates with described the second oil duct in described the first oil groove.

8. hollow camshaft according to claim 7, it is characterized in that, also be provided with the second oil groove on described the 3rd bearing, even spaced apart a plurality of the 3rd oil inlet holes that are provided with on described the second oil groove, a plurality of described the 3rd oil inlet holes communicate with corresponding the 3rd oil duct respectively, and many described the 3rd oil ducts are parallel with described the second oil duct and distribute around described the second oil duct.