CN210371865U - Hydraulic tensioner - Google Patents
Hydraulic tensioner Download PDFInfo
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- CN210371865U CN210371865U CN201921222967.9U CN201921222967U CN210371865U CN 210371865 U CN210371865 U CN 210371865U CN 201921222967 U CN201921222967 U CN 201921222967U CN 210371865 U CN210371865 U CN 210371865U
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Abstract
The utility model discloses a hydraulic tensioner, which comprises a tensioner shell and a plunger, wherein the plunger and a cavity are arranged in a clearance way; the part of the plunger, which is positioned outside the shell of the tensioner, is provided with a chain bottom support through a connecting piece; the structure of the plunger comprises: a limiting part and two end parts; the upper end part is sleeved with an upper end spring, and the lower end part is sleeved with a lower end spring; the limiting part is provided with four convex limiting blocks, and a groove matched with the limiting blocks is formed in a cavity in the tensioner shell; the bottom of the cavity of the tensioner is provided with an oil storage cavity, a one-way ball valve is arranged in the oil storage cavity, and a one-way valve cover is arranged above the one-way ball valve; the lower end of the tensioner shell is provided with an oil inlet hole and a buffer cavity; an oil drainage port and an oil drainage valve are arranged at the upper end of the tensioner shell, and the oil drainage port and the oil drainage valve are positioned below the limiting ring; the utility model discloses motion to the plunger has limiting displacement, uses the reliability high.
Description
Technical Field
The utility model belongs to the technical field of internal-combustion engine transmission system, more specifically say, the utility model relates to a hydraulic pressure tensioning ware.
Background
The hydraulic tensioner is widely applied to a timing transmission system of a novel internal combustion engine, and the hydraulic tensioner forms oil pressure damping through an internal hydraulic element to absorb vibration in a transmission process so as to reduce impact on parts in the transmission system, prolong the service life of the timing transmission system, ensure the accuracy and reliability of timing transmission, prevent a belt or a chain from jumping and disengaging, or prevent the chain from loosening and falling, reduce the abrasion of a chain wheel and the chain, reduce transmission noise and improve the driving comfort. The hydraulic tensioners in China mostly adopt a hydraulic spring structure.
The existing hydraulic tensioner does not have a limiting function on a plunger arranged in the existing hydraulic tensioner, and the plunger of the hydraulic tensioner cannot be effectively limited; when the plunger moves in the internal cavity of the tensioner, the plunger is easy to shift, namely the plunger does not strictly move in the vertical direction in the tensioner cavity, particularly when the tightness degree of a belt or a chain is changed violently, if the plunger shifts in the moving process, the plunger and the inner wall of the shell of the tensioner are easy to damage, and the plunger bends and the tensioner is damaged to lose the tensioning function in serious cases.
SUMMERY OF THE UTILITY MODEL
An object of the present invention is to solve at least the above problems and/or disadvantages and to provide at least the advantages which will be described later.
To achieve these objects and other advantages in accordance with the purpose of the invention, a hydraulic tensioner is provided, including:
the tensioner comprises a tensioner shell and a plunger, wherein a cavity is formed in the tensioner shell, the plunger is arranged in the cavity, and the plunger and the cavity are installed in a clearance mode; the part of the plunger, which is positioned outside the shell of the tensioner, is provided with a chain bottom support through a connecting piece;
the structure of the plunger comprises: the limiting part and the two end parts are in a step structure; the two end parts are respectively an upper end part and a lower end part, wherein the upper end part is sleeved with an upper end spring, and the lower end part is sleeved with a lower end spring; the limiting part is provided with four raised limiting blocks, a cavity in the tensioner shell is internally provided with a groove and a lug which are matched with the limiting blocks, the groove and the lug are positioned in the middle of the cavity in the tensioner shell and are axially arranged, the limiting blocks are positioned in the groove, the surfaces of the limiting blocks, the groove and the lug are all arc surfaces, and the diameter of the groove is the inner diameter of the tensioner cavity;
the bottom of the cavity of the tensioner is provided with an oil storage cavity, a one-way ball valve is arranged in the oil storage cavity, a one-way valve cover is arranged above the one-way ball valve, and the bottom end of the plunger is close to the upper surface of the one-way valve cover; a circle of limiting ring for limiting the upper end spring is detachably mounted at the top of the cavity of the tensioner shell;
the lower end of the tensioner shell is provided with an oil inlet hole and a buffer cavity, and the oil inlet hole is communicated with the buffer cavity and the oil storage cavity; an oil drainage port and an oil drainage valve are arranged at the upper end of the tensioner shell, and the oil drainage port and the oil drainage valve are positioned below the limiting ring; and the bolt penetrates through the tensioner shell and the upper end of the plunger, and limits the plunger in the tensioner shell to enable the lower end spring to be in a compressed state.
Preferably, a ring of sealing rings for sealing oil is arranged below the limiting ring of the tensioner.
Preferably, the upper end of the plunger is provided with threads, the connecting piece is in threaded connection with the plunger, and the connecting piece is in bolt connection with the chain shoe.
Preferably, a through hole is formed at the upper end of the plunger, a pin hole is formed at a position of the tensioner housing corresponding to the plunger through hole, and the pin passes through the through hole and the pin hole and is fixed on the plunger and the tensioner housing.
Preferably, the tensioner housing is externally provided with two opposite mounting parts, namely an upper mounting part and a lower mounting part, the upper mounting part is arranged in the middle of the tensioner housing, the lower mounting part is close to the bottom of the tensioner housing, and the upper mounting part and the lower mounting part are both provided with mounting holes.
Preferably, wherein, the upper end spring is located between spacing collar and the spacing portion, and the lower extreme spring is located between spacing portion and the one-way valve gap, and the diameter of upper end spring and lower extreme spring all is less than the diameter of spacing portion.
Preferably, the limit ring and the tensioner housing are detachably mounted in a threaded manner.
The utility model discloses at least, include following beneficial effect: the utility model provides a hydraulic tensioner's plunger is provided with the stopper, when the plunger receives oil pressure to move outside the tensioner casing, perhaps when contracting to the inside of tensioner casing, the stopper is spacing to the plunger jointly, prevents that the plunger from taking place the skew in the motion process, has protected the inner wall of plunger and tensioner casing, has avoided damaging because of friction striking between plunger and the tensioner casing, has guaranteed the reliability that the tensioner used, has prolonged the life of tensioner; the plunger limiting part, the upper end part and the lower end part are of a stepped structure, the diameter of the limiting part is larger than that of the upper end part and that of the lower end part, the arrangement enables the limiting part to abut against an upper end spring sleeved on the upper end part and a lower end spring sleeved on the lower end part, and the limiting part and an upper end compression spring of the oil storage cavity provide elasticity for the plunger to move towards the outside of the shell of the tensioner, enable a chain bottom support connected with the plunger to abut against the chain, and apply tension to the chain; when the chain is tightened and impact force is generated on the tensioner, the plunger moves towards the interior of the tensioner shell, and the lower end spring can buffer the impact force applied to the plunger, so that the tensioner shell and the oil storage cavity are prevented from being in hard contact with the plunger; similarly, the upper end spring cushions the impact force of the plunger on the upper end of the tensioner housing when the plunger moves outwards, and damage to the plunger and the tensioner housing caused by collision is avoided.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Description of the drawings:
fig. 1 is a schematic cross-sectional structural view of a hydraulic tensioner provided by the present invention;
fig. 2 is a schematic structural diagram of a plunger of the hydraulic tensioner provided by the present invention;
FIG. 3 is a schematic cross-sectional view of a hydraulic tensioner housing A-A provided by the present invention;
fig. 4 is a schematic side view of a hydraulic tensioner housing provided by the present invention;
fig. 5 is the utility model provides a hydraulic tensioner upper end spring and tensioning ware casing spacing collar position relation sketch map.
The specific implementation mode is as follows:
the present invention is further described in detail below with reference to the drawings so that those skilled in the art can implement the invention with reference to the description.
It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
As shown in fig. 1-5: the utility model discloses a hydraulic tensioner, include:
the tensioner comprises a tensioner shell 1 and a plunger 2, wherein the tensioner shell 1 is internally provided with a cavity, the plunger 2 is arranged in the cavity, and the plunger 2 and the cavity are installed in a clearance mode; wherein, the part of the plunger 2 outside the tensioner shell 1 is provided with a chain bottom support 3 through a connecting piece 4;
the structure of the plunger 2 includes: the limiting part 22 and the two end parts are in a ladder-shaped structure; the two end parts are respectively an upper end part 21 and a lower end part 23, wherein the upper end part 21 is sleeved with an upper end spring 6, and the lower end part 23 is sleeved with a lower end spring 7; the limiting part 22 is provided with four raised limiting blocks 25, a groove 102 and a bump 101 which are matched with the limiting blocks 25 are arranged in a cavity in the tensioner shell 1, the groove 102 and the bump 101 are positioned in the middle of the cavity in the tensioner and are axially arranged, the limiting blocks are positioned in the groove 102, the surfaces of the limiting blocks 25, the groove 102 and the bump 101 are all arc surfaces, the diameter of the groove is the inner diameter of the tensioner cavity, the limiting part 22 of the plunger 2 is just installed in the tensioner cavity, and the limiting blocks 25 are positioned in the groove 102 between the two bumps 101;
the bottom of the cavity of the tensioner is provided with an oil storage cavity 15, a one-way ball valve 11 is arranged in the oil storage cavity 15, a one-way valve cover 26 is arranged above the one-way ball valve 11, and the bottom end of the plunger 2 is close to the upper surface of the one-way valve cover 26; a circle of limiting ring 103 for limiting the upper end spring 6 is detachably mounted at the top of the cavity of the tensioner;
the lower end of the tensioner shell is provided with an oil inlet hole 16 and a buffer cavity 161, and the oil inlet hole 16 is communicated with the buffer cavity 161 and the oil storage cavity 15; an oil drainage port 14 and an oil drainage valve 8 are arranged at the upper end of the tensioner shell, and the oil drainage port 14 and the oil drainage valve 8 are positioned below the limiting ring 103; and a latch 9 which penetrates the tensioner housing 1 and the upper end of the plunger 2 and limits the plunger 2 in the tensioner housing 1, so that the lower end spring 7 is in a compressed state.
The working principle is as follows: as shown in the sectional structure diagram of the hydraulic tensioner shown in fig. 1, a plug pin 9 is inserted into the tensioner housing and the plunger, and the plunger 2 is fixed in the tensioner housing 1 in a limited manner, at this time, a lower end spring 7 is in a compressed state, the lower end spring generates resilience force on the plunger, but the plunger 2 cannot move out of the tensioner housing 1 because the plug pin is not taken out of the tensioner housing 1 and the plunger 2; the hydraulic tensioner is arranged on an automobile engine through an upper mounting part 13 and a lower mounting part 12, an oil inlet 16 is arranged at the position of an oil outlet of the engine, a chain bottom support of the hydraulic tensioner is enabled to support against a chain of the engine, a bolt 9 is pulled out, due to the rebound force of a lower end spring 7 on a plunger, the plunger moves towards the outside of a tensioner shell, tension is provided for the chain through the chain bottom support, and the chain is tightly supported; due to the limiting effect of the limiting ring 103 on the upper end spring 6, the plunger 2 can be prevented from being integrally ejected out of the tensioner shell 1, and the stability of the movement of the plunger 2 in the tensioner shell 1 is ensured; meanwhile, hydraulic oil enters a buffer chamber 161 and an oil storage chamber 15 of the tensioner in sequence through an oil inlet 16, when an engine driving chain starts to work normally, a plunger 2 reciprocates in a tensioner shell 1, the hydraulic oil is pumped into the tensioner shell 1 from the outside due to the pumping action of the plunger 2, the plunger 2 is pressurized, a damping effect is generated in the tensioner shell, the chain is prevented from loosening and falling off, the abrasion of the chain is reduced, and the noise is reduced; the one-way ball valve prevents the plunger from pressing down to enable hydraulic oil to flow back out of the tensioner shell; the arrangement of the oil drain valve 8 and the oil drain port 14 can prevent the internal cavity of the tensioner from being overhigh in pressure, and when the oil pressure is overhigh, part of hydraulic oil flows out of the internal cavity of the tensioner through the oil drain valve 8 and the oil drain port 14; the buffer chamber 161 can buffer the amount of the hydraulic oil entering the oil storage chamber 15, so that excessive hydraulic oil is prevented from entering the oil storage chamber 15 in a short time and applying excessive oil pressure to the plunger 2; in the moving process of the whole plunger 2, due to the guiding and limiting effect of the limiting block of the limiting part on the movement of the plunger, the plunger can axially move along the central axis of the tensioner shell, so that the plunger 2 cannot deviate in the tensioner shell 1, the plunger 2 is prevented from being worn and collided with the tensioner shell 1, the use reliability of the hydraulic tensioner is improved, and the service life of the hydraulic tensioner is prolonged.
In another example, a ring of sealing rings 5 for sealing engine oil is arranged below the limiting ring 103 of the tensioner, and the sealing rings seal hydraulic oil in the internal cavity of the tensioner housing and prevent the hydraulic oil from leaking out of the upper end of the tensioner housing 1.
In another example, the plunger 2 has threads at the upper end, the connecting piece 4 is connected with the plunger 2 in a threaded manner, and the connecting piece 4 is connected with the chain shoe 3 in a bolt manner.
In another example, the upper end 21 of the plunger 2 is provided with a through hole 211, the tensioner housing 1 is provided with a latch hole 10 at a position corresponding to the through hole 211, and the latch 9 is fixed to the plunger 2 and the tensioner housing 1 through the through hole 211 and the latch hole 10.
In another example, the tensioner housing 1 is externally provided with two opposite mounting portions, namely an upper mounting portion 13 and a lower mounting portion 12, the upper mounting portion 13 is arranged in the middle of the tensioner housing 1, the lower mounting portion 12 is close to the bottom of the tensioner housing 1, and the upper mounting portion 13 and the lower mounting portion 12 are both provided with mounting holes.
In another example, the upper end spring 6 is located between the limiting ring 103 and the limiting portion 22, the lower end spring 7 is located between the limiting portion 22 and the one-way valve cover 26, and the diameters of the upper end spring 6 and the lower end spring 7 are smaller than that of the limiting portion 22, and the limiting portion 22 can not only guide and limit the movement of the plunger 2 in the tensioner, but also can abut against the upper end spring 6 and the lower end spring 7.
In another example, the detachable mounting mode of spacing collar 103 and tensioner housing 1 is threaded connection, the utility model discloses hydraulic tensioner when assembling, pack plunger 2 into tensioner's casing 1 earlier, again with spacing collar 103 screw up in tensioner housing 1 upper end.
The number of apparatuses and the scale of the process described here are intended to simplify the description of the present invention. Applications, modifications and variations of the present invention will be apparent to those skilled in the art.
While the embodiments of the invention have been described above, it is not intended to be limited to the details shown, or described, but rather to cover all modifications, which would come within the scope of the appended claims, and all changes which come within the meaning and range of equivalency of the art are therefore intended to be embraced therein.
Claims (7)
1. A hydraulic tensioner, comprising:
the tensioner comprises a tensioner shell and a plunger, wherein a cavity is formed in the tensioner shell, the plunger is arranged in the cavity, and the plunger and the cavity are installed in a clearance mode; the part of the plunger, which is positioned outside the shell of the tensioner, is provided with a chain bottom support through a connecting piece;
the structure of the plunger comprises: the limiting part and the two end parts are in a step structure; the two end parts are respectively an upper end part and a lower end part, wherein the upper end part is sleeved with an upper end spring, and the lower end part is sleeved with a lower end spring; the limiting part is provided with four raised limiting blocks, a cavity in the tensioner shell is internally provided with a groove and a lug which are matched with the limiting blocks, the groove and the lug are positioned in the middle of the cavity in the tensioner shell and are axially arranged, the limiting blocks are positioned in the groove, the surfaces of the limiting blocks, the groove and the lug are all arc surfaces, and the diameter of the groove is the inner diameter of the tensioner cavity;
the bottom of the cavity of the tensioner is provided with an oil storage cavity, a one-way ball valve is arranged in the oil storage cavity, a one-way valve cover is arranged above the one-way ball valve, and the bottom end of the plunger is close to the upper surface of the one-way valve cover; a circle of limiting ring for limiting the upper end spring is detachably mounted at the top of the cavity of the tensioner;
the lower end of the tensioner shell is provided with an oil inlet hole and a buffer cavity, and the oil inlet hole is communicated with the buffer cavity and the oil storage cavity; an oil drainage port and an oil drainage valve are arranged at the upper end of the tensioner shell, and the oil drainage port and the oil drainage valve are positioned below the limiting ring; and the bolt penetrates through the tensioner shell and the upper end of the plunger, and limits the plunger in the tensioner shell to enable the lower end spring to be in a compressed state.
2. The hydraulic tensioner as in claim 1, wherein a ring of sealing rings for sealing oil is disposed below the stop collar of the tensioner.
3. The hydraulic tensioner as in claim 1, wherein the upper end of the plunger is threaded, the coupling member is threadably connected to the plunger, and the coupling member is bolted to the chain shoe.
4. The hydraulic tensioner as claimed in claim 1, wherein the plunger is provided at an upper end thereof with a through hole, and the tensioner housing is provided with a pin hole at a position corresponding to the plunger through hole, and the pin is fixed to the plunger and the tensioner housing through the through hole and the pin hole.
5. The hydraulic tensioner as claimed in claim 1, wherein the tensioner housing is externally provided with two opposite side mounting portions, an upper mounting portion and a lower mounting portion, respectively, the upper mounting portion being provided at a middle portion of the tensioner housing, the lower mounting portion being located near a bottom portion of the tensioner housing, the upper mounting portion and the lower mounting portion each having a mounting hole.
6. The hydraulic tensioner as claimed in claim 1, wherein the upper end spring is located between the retainer ring and the retainer portion, the lower end spring is located between the retainer portion and the check valve cover, and the upper end spring and the lower end spring each have a diameter smaller than that of the retainer portion.
7. The hydraulic tensioner as in claim 1, wherein the stop collar is removably mounted to the tensioner housing by a threaded connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921222967.9U CN210371865U (en) | 2019-07-31 | 2019-07-31 | Hydraulic tensioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921222967.9U CN210371865U (en) | 2019-07-31 | 2019-07-31 | Hydraulic tensioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210371865U true CN210371865U (en) | 2020-04-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921222967.9U Active CN210371865U (en) | 2019-07-31 | 2019-07-31 | Hydraulic tensioner |
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| Country | Link |
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| CN (1) | CN210371865U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108386502A (en) * | 2018-04-19 | 2018-08-10 | 上海利来链条有限公司 | A kind of stretcher |
-
2019
- 2019-07-31 CN CN201921222967.9U patent/CN210371865U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108386502A (en) * | 2018-04-19 | 2018-08-10 | 上海利来链条有限公司 | A kind of stretcher |
| CN108386502B (en) * | 2018-04-19 | 2023-05-26 | 上海利来链条有限公司 | Tensioning device |
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