Hydraulic tappet capable of reducing product clamping stagnation defect

Abstract

The utility model discloses a hydraulic tappet capable of reducing the clamping stagnation defect of a product. The hydraulic tappet solves the problem that in the prior art, a hydraulic tappet is prone to clamping stagnation in the using process. The plunger is arranged in the shell in a sliding mode and connected with a rocker arm, the low-pressure cavity is arranged in the plunger and used for storing engine oil, the high-pressure cavity is arranged between the shell and the plunger and communicated with the low-pressure cavity, the one-way valve mechanism is arranged at the bottom of the plunger, and the reset mechanism is arranged in the high-pressure cavity and connected with the one-way valve mechanism. The receding mechanism is arranged in the shell, the clamping spring is arranged on the plunger and used for limiting rotation of the plunger, and the oil liquid entering mechanism is arranged on the shell and communicates with the low-pressure cavity. The receding mechanism can be used for conveniently receding the plunger when the plunger moves up and down, so that the problem of clamping stagnation of the plunger in the process of moving up and down is avoided, the plunger can be conveniently limited by the clamp spring, and the problem of rotation of the plunger in the process of moving up and down is avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to hydraulic tappet technical field, specifically relates to a kind of hydraulic tappet capable of reducing product jam defect. BACKGROUND

[0002] Hydraulic tappet is a device for automatically adjusting valve clearance, which realizes the automatic adjustment of valve clearance through hydraulic system, reduces the impact and noise between parts, and improves the performance of engine.

[0003] To ensure the timely opening and closing of engine valve, the hydraulic tappet housing bore and the overall plunger outer diameter are assembled in a precision fit manner. The housing bore is usually machined by grinding, and the inner hole diameter is consistent in size. During machining, the housing bore inevitably produces cylindrical errors and other form and position errors. During assembly, due to the small gap, the hydraulic tappet and the housing bore appear to be jammed when the hydraulic tappet is running up and down, resulting in failure of the hydraulic tappet. SUMMARY

[0004] The utility model provides a kind of hydraulic tappet capable of reducing product jam defect to at least solve part of the above technical problems.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A kind of hydraulic tappet capable of reducing product jam defect, including shell, plunger slidingly arranged in shell and connected with rocker arm, low pressure chamber for storing oil arranged in plunger, high pressure chamber arranged between shell and plunger and connected with low pressure chamber, one-way valve mechanism arranged at the bottom of plunger for preventing oil backflow, reset mechanism arranged in high pressure chamber and connected with one-way valve mechanism for driving plunger reset, let go mechanism arranged in shell for letting go plunger, snap spring arranged on plunger for limiting plunger rotation, and oil inlet mechanism arranged on shell and connected with low pressure chamber.

[0007] Further, the shell is provided with a sliding groove in communication with the high pressure chamber, and the plunger is slidingly installed in the sliding groove. The oil inlet mechanism communicates with the low pressure chamber through the sliding groove, and the let go mechanism is arranged in the sliding groove.

[0008] Further, the let go mechanism includes a let go groove formed on the inner wall of the shell and in communication with the sliding groove.

[0009] Further, the let go groove has a diameter of 3-8um larger than that of the sliding groove.

[0010] Further, the plunger bottom is provided with a connecting hole for connecting the low-pressure chamber and the high-pressure chamber, the one-way valve mechanism comprises a one-way valve housing provided on the plunger bottom and connected with the top of the reset mechanism, a steel ball provided in the one-way valve housing and used for blocking the connecting hole, and a spring provided on the bottom wall of the one-way valve housing and connected with the steel ball and used for driving the steel ball to block the connecting hole; the diameter of the steel ball is larger than that of the connecting hole.

[0011] Further, the plunger bottom is provided with a connecting hole for connecting the low-pressure chamber and the high-pressure chamber, the one-way valve mechanism comprises a one-way valve housing provided on the plunger bottom and connected with the top of the reset mechanism, a steel ball provided in the one-way valve housing and used for blocking the connecting hole, and a spring provided on the bottom wall of the one-way valve housing and connected with the steel ball and used for driving the steel ball to block the connecting hole; the diameter of the steel ball is larger than that of the connecting hole.

[0012] Further, the reset mechanism comprises a reset installation cavity provided in the housing and connected with the high-pressure chamber, and a reset spring provided in the reset installation cavity and connected with the one-way valve mechanism.

[0013] Further, the oil inlet mechanism comprises a first oil inlet hole provided on the housing, an oil storage groove provided on the inner wall of the housing and connected with the first oil inlet hole, and a second oil inlet provided on the plunger and connected with the low-pressure chamber; the first oil inlet hole and the second oil inlet hole correspond to each other.

[0014] Further, the plunger outer wall is provided with a snap spring installation cavity connected with the second oil inlet hole, and the snap spring is installed in the snap spring installation cavity.

[0015] Further, the plunger outer wall is provided with a plurality of oil leakage holes connected with the low-pressure chamber; the oil leakage holes are located below the oil inlet mechanism.

[0016] Compared with the prior art, the utility model has the advantages of the following beneficial effects:

[0017] The utility model discloses simple structure, scientific and reasonable in design, convenient to use, the utility model discloses the mechanism of giving place is arranged in the housing, and the plunger is given place when moving up and down through the mechanism of giving place, thereby avoiding the problem that the plunger is stuck in the process of moving up and down, and the snap spring can conveniently limit the plunger, thereby avoiding the problem that the plunger is stuck in the process of moving up and down.

[0018] The utility model discloses oil leakage hole and low-pressure chamber are connected, in the process of using, when the oil in high-pressure chamber is compressed, a part of oil will extrude between the housing inner wall and the plunger outer wall, and this part of oil will reenter the low-pressure chamber through the oil leakage hole, thereby facilitating the driving of the hydraulic tappet, and this part of oil can also lubricate between the housing and the plunger, thereby further reducing the problem that the plunger is stuck in the process of moving up and down. DRAWINGS

[0019] Figure 1 It is the structure schematic diagram of the utility model.

[0020] Figure 2 It is a schematic view of the shell of the utility model.

[0021] Figure 3 It is a schematic view of the plunger of the utility model.

[0022] Among them, the name corresponding to the reference sign is:

[0023] 1, shell;2, plunger;3, low pressure chamber;4, high pressure chamber;5, clamp spring;6, sliding groove;7, let go of the slot;8, connecting hole;9, one-way valve shell;10, steel ball;11, spring;12, installation groove;13, reset installation cavity;14, reset spring;15, first oil inlet hole;16, oil storage groove;17, second oil inlet;18, clamp spring installation cavity;19, oil leakage hole. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the utility model more clear and obvious, the following will be further described in detail in combination with the drawings. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of the utility model.

[0025] In the description of the utility model, it needs to be explained that the orientation or position relationship indicated by the terms 'center', 'upper', 'lower', 'left', 'right','vertical', 'horizontal', 'inner', 'outer' and the like is the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and it is not indicated or implied that the indicated device or element must have a particular orientation or be constructed and operated in a particular orientation, so it cannot be understood as a limitation on the utility model. In addition, the terms 'first','second', 'third' are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0026] In the description of the utility model, it needs to be explained that, unless otherwise explicitly specified and limited, the terms 'installation', 'connection', 'connection' should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected. Of course, it can also be mechanically connected, or electrically connected. In addition, it can also be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances. EMBODIMENT

[0027] As Figures 1-3The utility model provides a hydraulic tappet capable of reducing product jam defect, which comprises a shell 1, a plunger 2 slidingly arranged in the shell 1 and connected with a rocker arm, a low-pressure chamber 3 arranged in the plunger 2 and used for storing oil, a high-pressure chamber 4 arranged between the shell 1 and the plunger 2 and connected with the low-pressure chamber 3, a one-way valve mechanism arranged at the bottom of the plunger 2 and used for preventing backflow of oil, a reset mechanism arranged in the high-pressure chamber 4 and connected with the one-way valve mechanism and used for driving the plunger 2 to reset, a give-way mechanism arranged in the shell 1 and used for giving way to the plunger 2, a snap spring 5 arranged on the plunger 2 and used for limiting rotation of the plunger 2, and an oil inlet mechanism arranged on the shell 1 and connected with the low-pressure chamber 3.

[0028] The plunger 2 is slidingly arranged in the shell 1, the central axis of the shell 1 is on the same line as the central axis of the plunger 2, the top of the plunger 2 is connected with the rocker arm, and the low-pressure chamber 3 is arranged in the plunger 2, so that the oil can be stored conveniently. The bottom of the plunger 2 and the bottom of the shell 1 form a gap, which is the high-pressure chamber 4. The one-way valve mechanism is arranged at the bottom of the plunger 2, so that the oil in the high-pressure chamber 4 can be prevented from flowing back into the low-pressure chamber 3. The give-way mechanism is arranged in the shell 1, so that the plunger 2 can be given way when moving up and down, thereby avoiding the problem of jamming of the plunger 2 during the moving process. The snap spring 5 can limit the plunger 2, thereby avoiding the problem of jamming of the plunger 2 during the moving process. The oil inlet mechanism is arranged on the shell 1 and connected with the low-pressure chamber 3, so that the oil can enter the low-pressure chamber 3 through the oil inlet mechanism. The reset mechanism is connected with the plunger 2 through the one-way valve mechanism, so that the reset mechanism can drive the plunger 2 to reset.

[0029] In use, the oil enters the low-pressure chamber 3 through the oil inlet mechanism. When the cam lobe is in the compression stroke, the plunger 2 moves downward, the reset mechanism is compressed, and the one-way valve mechanism is closed, so that the oil in the low-pressure chamber 3 cannot enter the high-pressure chamber 4 through the one-way valve mechanism. Due to the cooperation gap between the plunger 2 and the shell 1, a small amount of oil in the high-pressure chamber 4 can be pressed out through the cooperation gap between the plunger 2 and the shell 1. At this time, the plunger 2 cannot be continuously compressed, so as to open the intake and exhaust valves. When the cam lobe is in the exhaust stroke, the plunger 2 is reset under the action of the reset mechanism. At this time, due to the increase in the volume of the high-pressure chamber 4, the pressure in the high-pressure chamber 4 is less than the pressure in the low-pressure chamber 3. Under the action of the pressure, the one-way valve mechanism is opened, the oil in the low-pressure chamber 3 enters the high-pressure chamber 4 through the one-way valve mechanism, and a working cycle is completed. Meanwhile, the snap spring 5 is arranged on the plunger 2, so that the plunger 2 can be prevented from rotating during the moving process. Embodiment

[0030] As Figures 1-3As shown in the utility model provides a kind of hydraulic tappet capable of reducing product jam defect, including shell 1, plunger 2 slidingly arranged in shell 1 and being connected with rocker arm, low-pressure chamber 3 for storing oil in plunger 2, high-pressure chamber 4 being arranged between shell 1 and plunger 2 and being connected with low-pressure chamber 3, one-way valve mechanism for preventing oil backflow being arranged at the bottom of plunger 2, reset mechanism being arranged in high-pressure chamber 4 and being connected with one-way valve mechanism for driving plunger 2 reset, let go mechanism being arranged in shell 1 for plunger 2 let go, snap spring 5 being arranged on plunger 2 for limiting plunger 2 rotation, and oil inlet mechanism being arranged on shell 1 and being connected with low-pressure chamber 3.

[0031] Shell 1 is provided with sliding groove 6 connected with high-pressure chamber 4, plunger 2 is slidingly installed in sliding groove 6, and oil inlet mechanism passes through sliding groove 6 and is connected with low-pressure chamber 3, and let go mechanism is arranged in sliding groove 6.

[0032] The embodiment 2 gives more preferred structure of shell 1 based on the embodiment 1, specifically: shell 1 is provided with sliding groove 6 connected with high-pressure chamber 4, plunger 2 is slidingly installed in sliding groove 6, and oil inlet mechanism passes through sliding groove 6 and is connected with low-pressure chamber 3, and let go mechanism is arranged in sliding groove 6.

[0033] The utility model sliding groove 6 is arranged in shell 1, and sliding groove 6 is connected with high-pressure chamber 4, plunger 2 is slidingly installed in sliding groove 6, and plunger 2 slides up and down along the groove wall of sliding groove 6, oil inlet mechanism passes through sliding groove 6 and is connected with low-pressure chamber 3, and let go mechanism is arranged in sliding groove 6, so as to facilitate the let go of plunger 2, so as to avoid the jam phenomenon of plunger 2 in the moving process. Embodiment

[0034] As Figures 1-3 shown, the utility model provides a kind of hydraulic tappet capable of reducing product jam defect, including shell 1, plunger 2 slidingly arranged in shell 1 and being connected with rocker arm, low-pressure chamber 3 for storing oil in plunger 2, high-pressure chamber 4 being arranged between shell 1 and plunger 2 and being connected with low-pressure chamber 3, one-way valve mechanism for preventing oil backflow being arranged at the bottom of plunger 2, reset mechanism being arranged in high-pressure chamber 4 and being connected with one-way valve mechanism for driving plunger 2 reset, let go mechanism being arranged in shell 1 for plunger 2 let go, snap spring 5 being arranged on plunger 2 for limiting plunger 2 rotation, and oil inlet mechanism being arranged on shell 1 and being connected with low-pressure chamber 3.

[0035] Shell 1 is provided with sliding groove 6 connected with high-pressure chamber 4, plunger 2 is slidingly installed in sliding groove 6, and oil inlet mechanism passes through sliding groove 6 and is connected with low-pressure chamber 3, and let go mechanism is arranged in sliding groove 6.

[0036] The yielding mechanism includes a yielding groove 7 which is formed on the inner wall of the housing 1 and communicates with the sliding groove 6 .

[0037] This embodiment 3 provides a more preferred structure of the yielding mechanism based on embodiment 1, specifically: the yielding mechanism includes a yielding groove 7 opened on the inner wall of the shell 1 and connected to the sliding groove 6.

[0038] The utility model provides a clearance groove 7 on the inner wall of the shell 1, and the clearance groove 7 is connected to the sliding groove 6. The clearance groove 7 can increase the assembly tolerance between the inner wall of the shell 1 and the outer wall of the plunger 2, thereby avoiding the gap between the shell 1 and the plunger 2 being too small, resulting in the plunger 2 being stuck during the up and down movement. Example

[0039] like Figures 1-3 As shown, the utility model provides a hydraulic tappet that can reduce product sticking defects, including a housing 1, a plunger 2 slidably arranged in the housing 1 and connected to a rocker arm, a low-pressure chamber 3 arranged in the plunger 2 for storing engine oil, a high-pressure chamber 4 arranged between the housing 1 and the plunger 2 and connected to the low-pressure chamber 3, a one-way valve mechanism arranged at the bottom of the plunger 2 to prevent engine oil backflow, a reset mechanism arranged in the high-pressure chamber 4 and connected to the one-way valve mechanism for driving the plunger 2 to reset, a giving way mechanism arranged in the housing 1 for giving way to the plunger 2, a retaining spring 5 arranged on the plunger 2 for limiting the rotation of the plunger 2, and an oil inlet mechanism arranged on the housing 1 and connected to the low-pressure chamber 3.

[0040] The housing 1 is provided with a sliding groove 6 connected to the high-pressure chamber 4, the plunger 2 is slidably installed in the sliding groove 6, the oil inlet mechanism passes through the sliding groove 6 and is connected to the low-pressure chamber 3, and the yield mechanism is provided in the sliding groove 6.

[0041] The yielding mechanism includes a yielding groove 7 which is formed on the inner wall of the housing 1 and communicates with the sliding groove 6 .

[0042] The diameter of the clearance groove 7 is 3-8 μm larger than that of the sliding groove 6 .

[0043] This embodiment 4 provides a more preferred structure of the clearance groove 7 based on the embodiment 3, specifically: the diameter of the clearance groove 7 is 3-8 μm larger than the diameter of the sliding groove 6.

[0044] The diameter of the relief groove 7 of the present invention is 3-8 μm larger than the diameter of the sliding groove 6 , and is preferably 5 μm. The assembly tolerance of 5 μm can better prevent the plunger 2 from getting stuck during movement. Example

[0045] like Figures 1-3The utility model provides a hydraulic tappet capable of reducing product jamming defects, which comprises a shell 1, a plunger 2 slidingly arranged in the shell 1 and connected with a rocker arm, a low-pressure chamber 3 arranged in the plunger 2 and used for storing oil, a high-pressure chamber 4 arranged between the shell 1 and the plunger 2 and connected with the low-pressure chamber 3, a one-way valve mechanism arranged at the bottom of the plunger 2 and used for preventing backflow of oil, a reset mechanism arranged in the high-pressure chamber 4 and connected with the one-way valve mechanism and used for driving the plunger 2 to reset, a let-go mechanism arranged in the shell 1 and used for letting go of the plunger 2, a snap spring 5 arranged on the plunger 2 and used for limiting rotation of the plunger 2, and an oil inlet mechanism arranged on the shell 1 and connected with the low-pressure chamber 3.

[0046] The bottom of the plunger 2 is provided with a connecting hole 8 for connecting the low-pressure chamber 3 and the high-pressure chamber 4, the one-way valve mechanism comprises a one-way valve shell 9 arranged at the bottom of the plunger 2 and connected with the top of the reset mechanism, a steel ball 10 slidingly arranged in the one-way valve shell 9 and used for blocking the connecting hole 8, and a spring 11 arranged at one end on the bottom wall of the one-way valve shell 9 and connected with the other end of the steel ball 10 and used for driving the steel ball 10 to reset; the diameter of the steel ball 10 is greater than that of the connecting hole 8.

[0047] The bottom of the plunger 2 is provided with a connecting hole 8 for connecting the low-pressure chamber 3 and the high-pressure chamber 4, the one-way valve mechanism comprises a one-way valve shell 9 arranged at the bottom of the plunger 2 and connected with the top of the reset mechanism, a steel ball 10 slidingly arranged in the one-way valve shell 9 and used for blocking the connecting hole 8, and a spring 11 arranged at one end on the bottom wall of the one-way valve shell 9 and connected with the other end of the steel ball 10 and used for driving the steel ball 10 to reset; the diameter of the steel ball 10 is greater than that of the connecting hole 8.

[0048] The utility model discloses a plunger 2 bottom is equipped with the connecting hole 8 for the intercommunication of low pressure chamber 3 and high pressure chamber 4, through connecting hole 8 can make the oil in low pressure chamber 3 flow into high pressure chamber 4, one-way valve casing 9 sets up at plunger 2 bottom, and plunger 2 is connected with reset mechanism through one-way valve casing 9, and reset mechanism can conveniently reset plunger 2, steel ball 10 is slidably arranged in one-way valve casing 9, spring 11 is arranged in one-way valve casing 9, and spring 11 one end is connected with one-way valve casing 9, the other end is connected with steel ball 10, in the use process, when plunger 2 moves down, steel ball 10 makes steel ball 10 and connecting hole 8 abut tightly under the action of spring 11 and pressure, thereby make the oil in high pressure chamber 4 unable to enter low pressure chamber 3 through connecting hole 8, when plunger 2 moves down, the volume of high pressure chamber 4 increases, make the pressure in high pressure chamber lower than the pressure in low pressure chamber, steel ball 10 moves down under the action of pressure, thereby extrude spring 11, make steel ball 10 and connecting hole 8 separate, thereby conveniently make the oil in low pressure chamber 3 enter high pressure chamber 4 through the gap between steel ball 10 and connecting hole 8, to make the oil in low pressure chamber 3 and high pressure chamber 4 flow. EMBODIMENT

[0049] As Figures 1-3 shown, the utility model provides a hydraulic tappet that can reduce product jam defect, including casing 1, plunger 2 that is slidably arranged in casing 1 and is connected with rocker arm, low pressure chamber 3 that is arranged in plunger 2 and is used for storing oil, high pressure chamber 4 that is arranged between casing 1 and plunger 2 and is connected with low pressure chamber 3, one-way valve mechanism that is arranged at plunger 2 bottom and is used for preventing oil backflow, reset mechanism that is arranged in high pressure chamber 4 and is connected with one-way valve mechanism and is used for driving plunger 2 reset, let -go mechanism that is arranged in casing 1 and is used for giving room to plunger 2, snap spring 5 that is arranged on plunger 2 and is used for limiting plunger 2 rotation, and oil inlet mechanism that is arranged on casing 1 and is connected with low pressure chamber 3.

[0050] Plunger 2 bottom is equipped with the connecting hole 8 for the intercommunication of low pressure chamber 3 and high pressure chamber 4, one-way valve mechanism includes the one-way valve casing 9 that is arranged at plunger 2 bottom and is connected with reset mechanism top, steel ball 10 that is slidably arranged in one-way valve casing 9 and is used for blocking connecting hole 8, and spring 11 one end is arranged on the bottom wall in one-way valve casing 9, the other end is connected with steel ball 10 and is used for driving steel ball 10 reset, steel ball 10 is greater than the diameter of connecting hole 8.

[0051] Plunger 2 bottom is equipped with the installation groove 12 that is connected with connecting hole 8, and one-way valve casing 9 is installed in installation groove 12, and reset mechanism is located in installation groove 12.

[0052] This embodiment 6 provides a more preferred structure of the plunger 2 based on embodiment 5, specifically: a mounting groove 12 connected to the connecting hole 8 is provided at the bottom of the plunger 2, the one-way valve housing 9 is installed in the mounting groove 12, and the reset mechanism is located in the mounting groove 12.

[0053] The bottom of the plunger 2 of the present invention is provided with a mounting groove 12 which is connected to the connecting hole 8. The one-way valve housing 9 is installed in the mounting groove 12, and the reset mechanism is located in the mounting groove 12. The mounting groove 12 can facilitate the installation of the one-way valve housing 9 and can guide the reset mechanism during operation. Example

[0054] like Figures 1-3 As shown, the utility model provides a hydraulic tappet that can reduce product sticking defects, including a housing 1, a plunger 2 slidably arranged in the housing 1 and connected to a rocker arm, a low-pressure chamber 3 arranged in the plunger 2 for storing engine oil, a high-pressure chamber 4 arranged between the housing 1 and the plunger 2 and connected to the low-pressure chamber 3, a one-way valve mechanism arranged at the bottom of the plunger 2 to prevent engine oil backflow, a reset mechanism arranged in the high-pressure chamber 4 and connected to the one-way valve mechanism for driving the plunger 2 to reset, a giving way mechanism arranged in the housing 1 for giving way to the plunger 2, a retaining spring 5 arranged on the plunger 2 for limiting the rotation of the plunger 2, and an oil inlet mechanism arranged on the housing 1 and connected to the low-pressure chamber 3.

[0055] The reset mechanism includes a reset installation cavity 13 provided in the housing 1 and communicating with the high-pressure chamber 4 , and a reset spring 14 provided in the reset installation cavity 13 and connected to the one-way valve mechanism.

[0056] This embodiment 7 provides a more preferred structure of the reset mechanism based on embodiment 1, specifically: the reset mechanism includes a reset mounting chamber 13 provided in the shell 1 and connected to the high-pressure chamber 4, and a reset spring 14 provided in the reset mounting chamber 13 and connected to the one-way valve mechanism.

[0057] The reset mounting chamber 13 of the utility model is arranged in the housing 1, and the reset mounting chamber 13 is communicated with the high-pressure chamber 4. The reset mounting chamber 13 is adapted to the mounting groove 12, so as to facilitate the extrusion of the reset spring 14. One end of the reset spring 14 is installed in the reset mounting chamber 13, and the other end is connected to the one-way valve housing 9. During use, when the plunger 2 descends, the plunger 2 drives the one-way valve housing 9 to move downward, thereby squeezing the reset spring 14. When the plunger 2 rises, the reset spring 14 can push the plunger 2 to reset, thereby facilitating the operation of the hydraulic tappet. Example

[0058] like Figures 1-3As shown in the utility model provides a kind of hydraulic tappet capable of reducing product card stagnation defect, including shell 1, plunger 2 being slidably arranged in shell 1 and being connected with rocker arm, low-pressure chamber 3 for storing oil being arranged in plunger 2, high-pressure chamber 4 being arranged between shell 1 and plunger 2 and being connected with low-pressure chamber 3, one-way valve mechanism for preventing oil backflow being arranged at the bottom of plunger 2, reset mechanism being arranged in high-pressure chamber 4 and being connected with one-way valve mechanism for driving plunger 2 reset, let go mechanism being arranged in shell 1 for plunger 2 let go, snap spring 5 being arranged on plunger 2 for limiting plunger 2 rotation, and oil inlet mechanism being arranged on shell 1 and being connected with low-pressure chamber 3.

[0059] Oil inlet mechanism includes first oil inlet hole 15 opened on shell 1, oil storage groove 16 opened on the inner wall of shell 1 and connected with first oil inlet hole 15, and second oil inlet 17 opened on plunger 2 and connected with low-pressure chamber 3; first oil inlet hole 15 and second oil inlet 17 correspond.

[0060] The more preferred structure of the oil inlet mechanism is given based on example 1, specifically: the oil inlet mechanism includes first oil inlet hole 15 opened on shell 1, oil storage groove 16 opened on the inner wall of shell 1 and connected with first oil inlet hole 15, and second oil inlet 17 opened on plunger 2 and connected with low-pressure chamber 3; first oil inlet hole 15 and second oil inlet 17 correspond.

[0061] The first oil inlet hole 15 is arranged through the shell 1, the oil storage groove 16 is arranged on the inner wall of the sliding groove 6, and the oil storage groove 16 is connected with the first oil inlet hole 15, the second oil inlet 17 is arranged on the plunger 2, and the second oil inlet 17 is connected with the low-pressure chamber 3, in the use process, the oil enters the oil storage groove 16 through the first oil inlet hole 15, and the oil in the oil storage groove 16 enters the low-pressure chamber 3 through the second oil inlet 17. Example

[0062] As Figures 1-3 shown, the utility model provides a kind of hydraulic tappet capable of reducing product card stagnation defect, including shell 1, plunger 2 being slidably arranged in shell 1 and being connected with rocker arm, low-pressure chamber 3 for storing oil being arranged in plunger 2, high-pressure chamber 4 being arranged between shell 1 and plunger 2 and being connected with low-pressure chamber 3, one-way valve mechanism for preventing oil backflow being arranged at the bottom of plunger 2, reset mechanism being arranged in high-pressure chamber 4 and being connected with one-way valve mechanism for driving plunger 2 reset, let go mechanism being arranged in shell 1 for plunger 2 let go, snap spring 5 being arranged on plunger 2 for limiting plunger 2 rotation, and oil inlet mechanism being arranged on shell 1 and being connected with low-pressure chamber 3.

[0063] The oil inlet mechanism includes a first oil inlet hole 15 provided on the housing 1, an oil storage tank 16 provided on the inner wall of the housing 1 and connected to the first oil inlet hole 15, and a second oil inlet port 17 provided on the plunger 2 and connected to the low-pressure chamber 3; the first oil inlet hole 15 and the second oil inlet port 17 correspond to each other.

[0064] A retaining spring installation cavity 18 communicating with the second oil inlet 17 is provided on the outer wall of the plunger 2 , and the retaining spring 5 is installed in the retaining spring installation cavity 18 .

[0065] This embodiment 9 provides a more preferred structure of the plunger 2 based on the embodiment 8, specifically: a retaining spring installation cavity 18 connected to the second oil inlet 17 is provided on the outer wall of the plunger 2, and the retaining spring 5 is installed in the retaining spring installation cavity 18.

[0066] The retaining spring installation cavity 18 of the utility model is arranged on the outer wall of the plunger 2, and the retaining spring installation cavity 18 is communicated with the second oil inlet 17. The retaining spring 5 is installed in the retaining spring installation cavity 18. The retaining spring installation cavity 18 can facilitate the installation of the retaining spring 5. At the same time, the retaining spring 5 can prevent the plunger 2 from rotating when rising and falling.

[0067] Example 10.

[0068] like Figures 1-3 As shown, the utility model provides a hydraulic tappet that can reduce product sticking defects, including a housing 1, a plunger 2 slidably arranged in the housing 1 and connected to a rocker arm, a low-pressure chamber 3 arranged in the plunger 2 for storing engine oil, a high-pressure chamber 4 arranged between the housing 1 and the plunger 2 and connected to the low-pressure chamber 3, a one-way valve mechanism arranged at the bottom of the plunger 2 to prevent engine oil backflow, a reset mechanism arranged in the high-pressure chamber 4 and connected to the one-way valve mechanism for driving the plunger 2 to reset, a giving way mechanism arranged in the housing 1 for giving way to the plunger 2, a retaining spring 5 arranged on the plunger 2 for limiting the rotation of the plunger 2, and an oil inlet mechanism arranged on the housing 1 and connected to the low-pressure chamber 3.

[0069] A plurality of oil leakage holes 19 communicating with the low-pressure chamber 3 are provided on the outer wall of the plunger 2; the oil leakage holes 19 are located below the oil inlet mechanism.

[0070] This embodiment 10 provides a more preferred structure of the plunger 2 based on embodiment 1, specifically: a plurality of oil leakage holes 19 connected to the low-pressure chamber 3 are provided on the outer wall of the plunger 2; the oil leakage holes 19 are located below the oil inlet mechanism.

[0071] The utility model discloses four oil leakage holes 19 are preferably selected, four oil leakage holes 19 are evenly distributed on the outer wall of plunger 2, and oil leakage hole 19 is linked with low pressure chamber 3, in the use process, when the oil in high pressure chamber 4 is compressed, a part of oil will be extruded between the inner wall of shell 1 and the outer wall of plunger 2, and this part of oil will reenter low pressure chamber 3 through oil leakage hole 19, thereby facilitating the drive of hydraulic tappet, and this part of oil will also lubricate between the inner wall of shell 1 and the outer wall of plunger 2, thereby avoiding the problem of plunger 2 rising and falling.

[0072] Finally, it should be noted that: the above embodiments are merely the preferred embodiments of the utility model for describing the technical solutions of the utility model, but not limiting, of course, more is not the patent range of the utility model; although the utility model is described in detail with reference to the foregoing embodiments, those skilled in the art should understand: it still can modify the technical scheme recorded in the foregoing embodiments, or equivalent replacement to part or all technical features; and these modifications or replacements do not make the essence of the corresponding technical scheme deviate from the scope of the utility model embodiments technical scheme; that is to say, but whatever makes the substantive meaning of the main design idea and spirit of the utility model, or the polishing, the technical problem solved is still consistent with the utility model, and it should be included in the protection scope of the utility model; in addition, the technical scheme of the utility model is directly or indirectly used in other related technical fields, and the same reason includes in the patent protection scope of the utility model.

Claims

1. A hydraulic tappet capable of reducing product sticking defects, characterized in that: The invention comprises a housing (1), a plunger (2) slidably arranged in the housing (1) and connected to a rocker arm, a low-pressure chamber (3) arranged in the plunger (2) for storing engine oil, a high-pressure chamber (4) arranged between the housing (1) and the plunger (2) and connected to the low-pressure chamber (3), a one-way valve mechanism arranged at the bottom of the plunger (2) for preventing engine oil from flowing back, a reset mechanism arranged in the high-pressure chamber (4) and connected to the one-way valve mechanism for driving the plunger (2) to reset, a giving way mechanism arranged in the housing (1) for giving way to the plunger (2), a retaining spring (5) arranged on the plunger (2) for limiting the rotation of the plunger (2), and an oil inlet mechanism arranged on the housing (1) and connected to the low-pressure chamber (3).

2. A hydraulic tappet capable of reducing product sticking defects according to claim 1, characterized in that: The housing (1) is provided with a sliding groove (6) connected to the high-pressure chamber (4), the plunger (2) is slidably installed in the sliding groove (6), the oil inlet mechanism passes through the sliding groove (6) and is connected to the low-pressure chamber (3), and the yield mechanism is provided in the sliding groove (6).

3. The hydraulic tappet capable of reducing product sticking defects according to claim 2, characterized in that: The yielding mechanism comprises a yielding groove (7) which is formed on the inner wall of the housing (1) and is connected to the sliding groove (6).

4. A hydraulic tappet capable of reducing product sticking defects according to claim 3, characterized in that: The diameter of the clearance groove (7) is 3-8 μm larger than the diameter of the sliding groove (6).

5. The hydraulic tappet capable of reducing product sticking defects according to claim 1, characterized in that: A connecting hole (8) for connecting the low-pressure chamber (3) and the high-pressure chamber (4) is provided at the bottom of the plunger (2); the one-way valve mechanism comprises a one-way valve housing (9) provided at the bottom of the plunger (2) and connected to the top of the reset mechanism, a steel ball (10) provided in the one-way valve housing (9) for blocking the connecting hole (8), and a spring (11) having one end provided on the inner bottom wall of the one-way valve housing (9) and the other end connected to the steel ball (10) for driving the steel ball (10) to block the connecting hole (8); the diameter of the steel ball (10) is larger than the diameter of the connecting hole (8).

6. The hydraulic tappet capable of reducing product sticking defects according to claim 5, characterized in that: A mounting groove (12) communicating with the connecting hole (8) is provided at the bottom of the plunger (2), the one-way valve housing (9) is installed in the mounting groove (12), and the reset mechanism is located in the mounting groove (12).

7. The hydraulic tappet capable of reducing product sticking defects according to claim 1, characterized in that: The reset mechanism comprises a reset installation cavity (13) disposed in the housing (1) and connected to the high-pressure chamber (4), and a reset spring (14) disposed in the reset installation cavity (13) and connected to the one-way valve mechanism.

8. The hydraulic tappet capable of reducing product sticking defects according to claim 1, characterized in that: The oil inlet mechanism comprises a first oil inlet hole (15) provided on the housing (1), an oil storage tank (16) provided on the inner wall of the housing (1) and connected to the first oil inlet hole (15), and a second oil inlet port (17) provided on the plunger (2) and connected to the low-pressure chamber (3); the first oil inlet hole (15) and the second oil inlet port (17) correspond to each other.

9. The hydraulic tappet capable of reducing product sticking defects according to claim 8, characterized in that: A retaining spring installation cavity (18) communicating with the second oil inlet (17) is provided on the outer wall of the plunger (2), and the retaining spring (5) is installed in the retaining spring installation cavity (18).

10. The hydraulic tappet capable of reducing product sticking defects according to claim 1, characterized in that: A plurality of oil leakage holes (19) communicating with the low-pressure chamber (3) are provided on the outer wall of the plunger (2); the oil leakage holes (19) are located below the oil inlet mechanism.

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