Hydraulic lash adjuster without active oil supply and air distribution mechanism

Abstract

The utility model belongs to the technical field of hydraulic lash adjusters, and particularly discloses a hydraulic lash adjuster without active oil supply, which comprises a tappet body, a ball plug and a one-way valve component, the top and the bottom of the ball plug are respectively provided with an oil inlet and an oil outlet, the ball plug is positioned in the tappet body and is in axial sliding fit with the tappet body, and a cavity in the ball plug is a low-pressure cavity. A cavity between the bottom of the ball plug and the tappet body is a high-pressure cavity; the ball plug can move downwards under the action of external force and can reset under the action of the one-way valve assembly. A ball plug oil storage ring groove is formed in the outer side of the ball plug, a tappet body oil storage ring groove and an oil guide groove are formed in the inner wall of the tappet body, the two ends of the oil guide groove are communicated with the outside and the tappet body oil storage ring groove respectively, and the oil guide groove, the tappet body oil storage ring groove and the ball plug jointly form an oil storage cavity. Extra parts do not need to be added to form an oil storage structure, machining difficulty is reduced, and cost is saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to hydraulic gap adjuster technical field, concretely relates to a kind of hydraulic gap adjuster without active oil supply. BACKGROUND

[0002] The existing hydraulic gap adjuster includes two forms of hydraulic gap adjuster with active oil supply system and hydraulic gap adjuster without active oil supply system.

[0003] Among them, the hydraulic gap adjuster with active oil supply system is installed in the tappet body mounting hole of the engine cylinder head, the tappet body mounting hole is communicated with the oil passage of the engine cylinder head, and the oil passage hole and the tappet body mounting hole are filled with oil when the engine is running. When the hydraulic gap adjuster works, the oil passage continuously supplies oil to the hydraulic gap adjuster. In this way, the lubrication system is needed, and the oil passage needs to be designed on the engine cylinder head, which has complex processing technology and high processing difficulty.

[0004] The hydraulic gap adjuster without active oil supply system is installed in the cylinder head tappet body mounting hole, and the hydraulic gap adjuster is not supplied by the oil in the oil passage. The oil supply of the hydraulic gap adjuster relies on an independent oil storage mechanism. In the prior art, the oil storage mechanism is arranged on the engine cylinder head. The oil source of the oil storage mechanism arranged in this way is the oil sprayed by the engine splash lubrication. It does not need the lubrication system to supply oil, reduces the process of processing the oil passage, and saves the cost.

[0005] However, the oil storage mechanism arranged on the engine cylinder head needs to be separately processed to form an oil storage groove. The oil storage mechanism is communicated with the oil passage of the tappet body mounting hole, which has smaller processing difficulty than the hydraulic gap adjuster with active oil supply system, but it also needs to be separately processed to form an oil storage groove and an oil passage communicated with the tappet body mounting hole, which has the disadvantages of complex processing technology and increased cost. SUMMARY

[0006] The utility model provides a kind of hydraulic gap adjuster without active oil supply, which aims to not need the engine to supply oil to the hydraulic gap adjuster through the oil passage, reduce the processing difficulty, and save the cost.

[0007] The utility model discloses a hydraulic gap adjuster without active oil supply, which comprises a tappet body, a ball plug and a one-way valve assembly, wherein the top and bottom of the ball plug are respectively provided with an oil inlet and an oil outlet, the ball plug is located in the tappet body and axially slides with the tappet body, the cavity in the ball plug is a low-pressure cavity, and the cavity between the bottom of the ball plug and the tappet body is a high-pressure cavity; the one-way valve assembly is installed in the high-pressure cavity; the ball plug can move downward under the action of external force and reset under the action of the one-way valve assembly; the one-way valve assembly controls the disconnection and communication of the low-pressure cavity and the high-pressure cavity when the ball plug moves downward; the outer side of the ball plug is provided with a ball plug oil storage ring groove; the inner wall of the tappet body is provided with a tappet body oil storage ring groove and an oil guide groove; the oil guide groove is located above the tappet body oil storage ring groove; the two ends of the oil guide groove are respectively connected with the outside and the tappet body oil storage ring groove; and the oil guide groove, the tappet body oil storage ring groove and the ball plug jointly form an oil storage cavity.

[0008] Further, the oil guide groove is provided with a plurality of oil guide grooves which are distributed in the circumferential direction of the inner cavity of the tappet body.

[0009] Further, the one-way valve assembly comprises a steel ball, a one-way valve spring, a one-way valve spring seat and a ball plug reset spring; the two ends of the ball plug reset spring are respectively abutted between the one-way valve spring seat and the bottom wall of the tappet body; the one-way valve spring seat is clamped on the bottom of the ball plug; the steel ball and the one-way valve spring are located in the one-way valve spring seat; and the steel ball can block or open the oil outlet on the bottom of the ball plug.

[0010] Further, the inner cavity of the tappet body comprises an upper ball plug accommodating cavity, a lower ball plug accommodating cavity and a reset spring mounting hole from top to bottom; the oil guide groove and the tappet body oil storage ring groove are arranged in the upper ball plug accommodating cavity; and the ball plug reset spring is mounted in the reset spring mounting hole.

[0011] Further, the outer side of the ball plug oil storage ring groove is provided with a clasp which can limit the vertical reciprocating movement distance of the ball plug.

[0012] Further, the lower part of the tappet body is inwardly notched on the outer side.

[0013] Further, the groove depth of the ball plug oil storage ring groove is greater than the groove depth of the tappet body oil storage ring groove.

[0014] Further, the ball plug is provided with an oil hole which communicates with the inside of the ball plug; and the oil hole is located in the oil storage cavity.

[0015] Further, the oil guide groove is a spiral groove or a straight groove.

[0016] A kind of gas distribution mechanism, including engine cylinder cover and rocker arm body, the engine cylinder cover is equipped with adjuster mounting hole, the above-mentioned one without active oil supply hydraulic gap adjuster is installed in the adjuster mounting hole, the top of the tappet body is below the top of the engine cylinder cover, and the oil collecting part is formed between the adjuster mounting hole, the oil collecting part is flared.

[0017] The bottom surface of the rocker arm body is provided with a ball socket matched with the top of the ball plug, and an oil collecting port communicating with the ball plug is formed in the ball socket of the rocker arm body.

[0018] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0019] The utility model discloses not need the engine lubricating system to carry out active oil supply to the hydraulic gap adjuster through the oil passage, and the oil storage cavity does not need to be arranged on the engine cylinder cover, is arranged between the tappet body inner chamber and the ball plug, directly processes the tappet body and the ball plug to form the oil storage cavity, does not need to increase other parts to constitute the oil storage cavity structure, effectively reduces the processing difficulty, saves the cost.

[0020] In addition, the oil guide groove formed on the inner wall of the tappet body, the tappet body oil storage ring groove and the ball plug oil storage ring groove form an oil storage chamber, the oil guide groove and the tappet body oil storage ring groove can store lubricating oil, and the oil guide groove can guide the lubricating oil entering or flowing out of the tappet body. The oil guide groove can store as much lubricating oil as possible in the storage chamber, thereby facilitating continuous oil replenishment in the high-pressure chamber. BRIEF DESCRIPTION OF DRAWINGS

[0021] The drawings described herein are used to provide further understanding of the embodiments of the utility model and form part of the present application, and do not constitute limitation on the embodiments of the utility model. In the drawings:

[0022] Figure 1 It is a longitudinal sectional view of the embodiment of the utility model of a kind of hydraulic gap adjuster without active oil supply;

[0023] Figure 2 It is the assembly schematic diagram of the ball plug of the embodiment of the utility model of a kind of hydraulic gap adjuster without active oil supply in tappet body;

[0024] Figure 3 It is the longitudinal sectional view of the tappet body in the embodiment of the utility model of a kind of hydraulic gap adjuster without active oil supply;

[0025] Figure 4 It is the perspective view of the tappet body in the embodiment of the utility model of a kind of hydraulic gap adjuster without active oil supply;

[0026] Figure 5 A partial sectional view of an embodiment of the gas distribution mechanism of the utility model;

[0027] Figure 6 A schematic diagram of the flow route of oil when the ball plug is extended in an embodiment of the hydraulic gap adjuster without active oil supply of the utility model;

[0028] Figure 7 A schematic diagram of the flow route of oil when the ball plug is extended in an embodiment of the hydraulic gap adjuster without active oil supply of the utility model;

[0029] Figure 8 A Figure 7 A partial enlarged view of I in the figure.

[0030] Markings in the figure and corresponding names of parts:

[0031] Ball plug 1, oil hole 1.1, ball plug oil storage ring groove 1.2, oil inlet 1.3;

[0032] Tappet body 2, upper ball plug accommodating cavity 2.1, oil guide groove 2.2, tappet body oil storage ring groove 2.3, lower ball plug accommodating cavity 2.4, reset spring mounting hole 2.5;

[0033] Retaining ring 3, steel ball 4, one-way valve spring 5, one-way valve spring seat 6, ball plug reset spring 7, low-pressure cavity 8, high-pressure cavity 9, engine cylinder head 10;

[0034] Rocker arm body 11, oil collecting port 11.1;

[0035] Oil collecting part 12. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical scheme and advantages of the utility model more clear and obvious, the utility model is further described in detail below by combining with embodiments and figures, and the schematic embodiment and its description of the utility model are only used for explaining the utility model, and do not serve as the limitation of the utility model.

[0037] As Figures 1-2 shown, the embodiment provides a hydraulic gap adjuster without active oil supply, which comprises a tappet body 2, a ball plug 1 and a one-way valve assembly, the top and bottom of the ball plug 1 are respectively provided with an oil inlet 1.3 and an oil outlet, the ball plug 1 is located in the tappet body 2 and axially slidably matched with the tappet body 2, the cavity in the ball plug 1 is a low-pressure cavity 8, and the cavity between the bottom of the ball plug 1 and the tappet body 2 is a high-pressure cavity 9; the one-way valve assembly is installed in the high-pressure cavity 9; the ball plug 1 can move downward under the action of external force and reset under the action of the one-way valve assembly; the ball plug 1 moves downward, and the one-way valve assembly controls the disconnection and communication of the low-pressure cavity 8 and the high-pressure cavity 9.

[0038] The one-way valve assembly in the embodiment comprises a steel ball 4, a one-way valve spring 5, a one-way valve spring seat 6, and a ball plug reset spring 7, the two ends of the ball plug reset spring 7 are respectively abutted against the one-way valve spring seat 6 and the bottom wall of the tappet body 2, the one-way valve spring seat 6 is clamped at the bottom of the ball plug 1, and the one-way valve spring seat 6 is in a hollow shape, that is, when the steel ball 4 is away from the oil outlet at the bottom of the ball plug 1, the oil in the low-pressure cavity 8 can enter the one-way valve spring seat 6 and flow to the high-pressure cavity 9.

[0039] The steel ball 4 and the one-way valve spring 5 are located in the one-way valve spring seat 6, the steel ball 4 can block or open the oil outlet at the bottom of the ball plug 1, and the one-way valve spring 5 is located between the steel ball 4 and the one-way valve spring seat 6, the working principle and structure of the one-way valve assembly in the embodiment are same as those of the one-way valve assembly in the hydraulic gap adjuster in the prior art, the steel ball 4, the one-way valve spring 5, the one-way valve spring seat 6 and the ball plug reset spring 7 constitute a one-way valve system, and the one-way valve system can control the disconnection and communication of the low-pressure cavity 8 and the high-pressure cavity 9.

[0040] In the embodiment, a ball plug oil storage ring groove 1.2 is formed in the outer side of the ball plug 1, an inner wall of the tappet body 2 is provided with a tappet body oil storage ring groove 2.3 and an oil guide groove 2.2, the oil guide groove 2.2 is located above the tappet body oil storage ring groove 2.3, the two ends of the oil guide groove 2.2 are respectively penetrated through the outside and the tappet body oil storage ring groove 2.3, and the oil guide groove 2.2, the tappet body oil storage ring groove 2.3 and the ball plug 1 jointly constitute an oil storage cavity.

[0041] The inner cavity of the tappet body 2 sequentially comprises an upper ball plug accommodating cavity 2.1, a lower ball plug accommodating cavity 2.4 and a reset spring mounting hole 2.5 from top to bottom, the oil guide groove 2.2 and the tappet body oil storage ring groove 2.3 are arranged in the upper ball plug accommodating cavity 2.1, and the ball plug reset spring 7 is mounted in the reset spring mounting hole 2.5.

[0042] The oil guide groove 2.2 in the utility model is a spiral groove or a straight groove, as shown in Figure 3 and Figure 4 The oil guide groove 2.2 in the embodiment is taken as an example for description in the form of a spiral groove, and the spiral groove in the embodiment is provided with four spiral grooves which are uniformly distributed along the inner cavity of the tappet body 2 in the circumferential direction, the directions of the four spiral grooves are consistent, and the four spiral grooves are spirally arranged in the clockwise or counterclockwise direction.

[0043] As shown in Figure 1As shown, the outer side of the ball plug oil storage ring groove 1.2 is sleeved with a ring 3, which can limit the vertical reciprocating movement distance of the ball plug 1, and the ring 3 can limit the vertical movement stroke of the ball plug 1. Specifically, in an embodiment, the connecting and mounting mode of the ring 3 can be that the ring 3 is mounted on the inner wall of the tappet body oil storage ring groove 2.3. When the ball plug 1 moves vertically, the ring 3 can abut against the top and bottom of the ball plug oil storage ring groove 1.2. A clamping groove for mounting the limiting ring 3 is formed on the inner wall of the tappet body oil storage ring groove 2.3, so that the position of the ring 3 is fixed. During the upward and downward movement of the ball plug 1, the top wall and the bottom wall of the ball plug oil storage ring groove 1.2 will limit the ring 3, so that the ball plug 1 can avoid being pulled out of the tappet body 2 while meeting the vertical displacement.

[0044] In another embodiment, the connecting and mounting mode of the ring 3 can be that a clamping groove is formed on the ball plug oil storage ring groove 1.2, and the ring 3 is sleeved on the clamping groove for limiting. The outer side of the ring 3 is located in the tappet body oil storage ring groove 2.3. During the vertical movement of the ball plug 1, the ring 3 can be limited by the top wall and the bottom wall of the tappet body oil storage ring groove 2.3, thereby limiting the vertical stroke of the ball plug 1 and avoiding the ball plug 1 from being pulled out of the tappet body 2.

[0045] As shown in the figure, Figure 1 In this embodiment, the top surface and the bottom surface of the ball plug oil storage ring groove 1.2 and the tappet body oil storage ring groove 2.3 are both inclined surfaces. The top surface and the bottom surface of the ball plug oil storage ring groove 1.2 are inclined surfaces, which meet the processing technology requirements. The inclined surface on the tappet body oil storage ring groove 2.3 can guide the assembly of the ball plug 1, and the inclined surface is convenient for assembly with the ball plug 1.

[0046] As shown in the figure, Figure 1 An oil hole 1.1 is formed on the ball plug 1 and communicates with the inside of the ball plug 1. The oil hole 1.1 is located in the oil storage cavity. The oil hole 1.1 is provided to facilitate oil supplement from the oil storage cavity to the high-pressure cavity 9 and the low-pressure cavity 8. In this embodiment, the tappet body 2 is a straight cylinder structure. The lower part of the tappet body 2 is inwardly recessed, that is, the lower part of the tappet body 2 is an inwardly recessed arc surface, which avoids interference with the mounting hole on the engine cylinder head 10 for mounting the tappet body 2.

[0047] In another embodiment, the groove depth of the ball plug oil storage ring groove 1.2 is greater than the groove depth of the tappet body oil storage ring groove 2.3, that is, the radial width of the ball plug oil storage ring groove 1.2 is greater than the radial width of the tappet body oil storage ring groove 2.3. In this way, the volume of the oil storage cavity can be increased, and the processing is facilitated.

[0048] In combination with Figure 5As shown in another embodiment, the embodiment also discloses a gas distribution mechanism, comprising an engine cylinder head 10 and a rocker arm body 11, the engine cylinder head 10 is provided with an adjuster mounting hole, the above-mentioned hydraulic lash adjuster without active oil supply is mounted in the adjuster mounting hole, the length of the tappet body 2 is lower than the depth of the adjuster mounting hole, so that the top of the tappet body 2 is below the top of the engine cylinder head 10, and the top of the tappet body 2 and the adjuster mounting hole form an oil collecting part 12, and the oil collecting part 12 is flared;

[0049] The bottom surface of the rocker arm body 11 is provided with a ball socket matched with the top of the ball plug 1, and the ball socket of the rocker arm body 11 is provided with an oil collecting port 11.1 in communication with the ball plug 1, the oil collecting port 11.1 is flared, that is, the oil collecting port 11.1 is a tapered hole with a large outer diameter and a small inner diameter, and the oil collecting port 11.1 and the oil collecting part 12 both have the function of collecting oil, and the splashed lubricating oil enters from the oil collecting port 11.1 and the oil collecting part 12. The ball plug 1 is in frictional contact with the ball socket of the rocker arm body 11, the cam in the engine rotates to drive the rocker arm body 11 to swing up and down, thereby driving the ball plug 1 to move vertically and reciprocally.

[0050] The specific implementation process is as follows:

[0051] The hydraulic lash adjuster without active oil supply in this embodiment has two movement modes of compression and extension during operation: combination Figure 6 As shown, when the rocker arm body 11 compresses the top of the ball plug 1, the ball plug 1 moves downward under the force on the spherical surface, at this time, under the pressure of the high-pressure cavity 9, the steel ball 4 will block the oil outlet of the ball plug 1 upward, at this time, the one-way valve assembly is closed, and the low-pressure cavity 8 is disconnected from the high-pressure cavity 9; When the pressure is continuously applied, the oil in the high-pressure cavity 9 flows into the tappet body oil storage ring groove 2.3 from the gap between the ball plug 1 and the ball plug 1 accommodating hole, and the oil in the tappet body oil storage ring groove 2.3 flows out from the oil guide groove 2.2 or flows into the low-pressure cavity 8 from the oil hole 1.1.

[0052] Combination Figure 7 And Figure 8 As shown, when one end of the rocker arm body 11 is raised upward, the ball plug 1 extends upward, at this time, the force on the spherical surface of the ball plug 1 disappears, and the ball plug return spring 7 pushes the ball plug 1 to return upward, during the return process, the one-way valve assembly is affected by the negative pressure of the high-pressure cavity 9, and the one-way valve assembly is opened (at this time, the steel ball 4 is compressed downward by the one-way valve spring 5 under the action of the negative pressure of the high-pressure cavity 9, and the low-pressure cavity 8 is communicated with the high-pressure cavity 9), during the return process, the low-pressure cavity 8 continuously supplies oil to the high-pressure cavity 9, and the missing part of the oil in the low-pressure cavity 8 is filled by the oil stored in the tappet body oil storage ring groove 2.3 and the oil guide groove 2.2. When the ball plug 1 is returned, the one-way valve spring 5 is returned to push the steel ball 4 upward to contact the ball plug 1, thereby blocking the oil outlet at the bottom of the ball plug 1, at this time, the low-pressure cavity 8 is disconnected from the high-pressure cavity 9.

[0053] It is to be understood that the embodiments that have been described are merely illustrative of the principles of the application. Numerous modifications can be made by those skilled in the art without departing from the scope of the application. For example, elements of one embodiment can be combined with elements of another embodiment. The disclosure is not limited to the embodiments described above, but rather the scope of the disclosure is to be accorded the broadest scope of the principles and novel features disclosed herein.

Claims

1. A hydraulic lash adjuster without active oil supply, comprising a tappet body, a ball, a one-way valve assembly, a top and a bottom of the ball are respectively provided with an oil inlet and an oil outlet, the ball is located in the tappet body and axially slidably matched with the tappet body, a cavity in the ball is a low-pressure cavity, a cavity between the bottom of the ball and the tappet body is a high-pressure cavity; the one-way valve assembly is installed in the high-pressure cavity; the ball can move downward under the action of an external force and can reset under the action of the one-way valve assembly; the ball moves downward, and the one-way valve assembly controls the disconnection and communication of the low-pressure cavity and the high-pressure cavity, characterized in that, The outer side of the ball plug is provided with a ball plug oil storage ring groove, the inner wall of the tappet body is provided with a tappet body oil storage ring groove and an oil guide groove, the oil guide groove is located above the tappet body oil storage ring groove, the two ends of the oil guide groove are respectively communicated with the outside and the tappet body oil storage ring groove, and the oil guide groove, the tappet body oil storage ring groove and the ball plug jointly form an oil storage cavity.

2. A hydraulic lash adjuster without active oil supply according to claim 1, characterized in that The oil guide groove is provided with a plurality of oil guide grooves which are distributed in the circumferential direction of the inner cavity of the tappet body.

3. A hydraulic lash adjuster without active oil supply according to claim 1, characterized in that The one-way valve assembly comprises a steel ball, a one-way valve spring, a one-way valve spring seat and a ball plug return spring, the two ends of the ball plug return spring are respectively abutted between the one-way valve spring seat and the bottom wall of the tappet body, the one-way valve spring seat is clamped at the bottom of the ball plug, the steel ball and the one-way valve spring are located in the one-way valve spring seat, and the steel ball can block or open the oil outlet at the bottom of the ball plug.

4. A hydraulic lash adjuster without active oil supply according to claim 3, characterized in that The inner cavity of the tappet body comprises an upper ball plug containing cavity, a lower ball plug containing cavity and a return spring mounting hole from top to bottom, the oil guide groove and the tappet body oil storage ring groove are arranged in the upper ball plug containing cavity, and the ball plug return spring is mounted in the return spring mounting hole.

5. A hydraulic lash adjuster without active oil supply according to claim 1, characterized in that The outer side of the ball plug oil storage ring groove is provided with a clamping ring which can limit the vertical reciprocating movement distance of the ball plug.

6. A hydraulic lash adjuster without active oil supply according to claim 1, characterized in that The lower part of the tappet body is inwardly recessed at the outer side thereof.

7. A hydraulic lash adjuster without active oil supply according to claim 1, characterized in that The groove depth of the ball plug oil storage ring groove is greater than the groove depth of the tappet body oil storage ring groove.

8. A hydraulic lash adjuster without active oil supply according to claim 1, characterized in that The ball plug is provided with an oil hole which is in communication with the inside of the ball plug, and the oil hole is located in the oil storage cavity.

9. A hydraulic lash adjuster without active oil supply according to any of claims 1 to 8, characterized in that The oil guide groove is a spiral groove or a straight groove.

10. A gas distribution arrangement, characterized by The hydraulic lash adjuster without active oil supply comprises an engine cylinder head and a rocker body, the engine cylinder head is provided with an adjuster mounting hole, the hydraulic lash adjuster without active oil supply is mounted in the adjuster mounting hole, the top of the tappet body is located below the top of the engine cylinder head, an oil collecting part is formed between the top of the tappet body and the adjuster mounting hole, and the oil collecting part is in the shape of a flared opening. The bottom surface of the rocker body is provided with a ball socket which is matched with the top of the ball plug, the rocker body is provided with an oil collecting opening which is in communication with the ball plug and is in the shape of a flared opening.

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