CN210889943U - Automatic tensioner with circular damping sleeve - Google Patents
Automatic tensioner with circular damping sleeve Download PDFInfo
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- CN210889943U CN210889943U CN201921667415.9U CN201921667415U CN210889943U CN 210889943 U CN210889943 U CN 210889943U CN 201921667415 U CN201921667415 U CN 201921667415U CN 210889943 U CN210889943 U CN 210889943U
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Abstract
The utility model discloses an automatic tensioner with a circular damping sleeve, relating to the technical field of automatic tensioners; including the base of rigid coupling on the engine, the straining arm that the lid was established on the base and was connected with the band pulley, wear to establish the dabber on the straining arm, the cover is established at the epaxial spring of dabber, the cover is equipped with coaxial damping sleeve on the dabber, straining arm is close to base one side and is equipped with lever supporting shoe and lever support, the spring includes the first terminal surface that is close to the straining arm and keeps away from the second terminal surface of straining arm, damping sleeve includes thick wall section and thin wall section, the lever support outside supports and leans on the inner edge face of thin wall section, the spring supports and leans on the inner edge. The utility model discloses the wearing and tearing of damping spare are even, and the damping is effectual, in addition, simple structure, stable performance.
Description
Technical Field
The utility model belongs to the technical field of automatic tensioning ware, in particular to automatic tensioning ware with circular damping sleeve is equipped with.
Background
The tensioner for the automobile engine is connected with the belt wheel and the engine, and mainly aims to enable the tension of a belt in a transmission system to meet design requirements, compensate tension change or attenuation caused by swinging of a tensioning arm due to belt abrasion, lengthening and engine rotating speed fluctuation, and further avoid belt slipping, noise and vibration; also, in order to effectively damp vibrations of the tensioner during operation, a damping device is generally used in the tensioner. The tension required in a pulley system is mainly provided by a helical spring in the tensioner and the damping force required to damp the vibration of the tensioner arm is mainly provided by a damping device in the tensioner. The damping device in the traditional automatic tensioner is a single damping piece or a double-damping piece damping device which is symmetrically arranged, so that the problem of uneven wear of the damping piece exists during working, and the working requirement of the tensioner cannot be well met.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the inhomogeneous shortcoming of prior art damping piece wearing and tearing, propose an automatic tensioning ware that is equipped with circular damping sleeve, damping piece wearing and tearing are even.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
an automatic tensioner with a circular damping sleeve comprises a base fixedly connected to an engine, a tensioning arm covered on the base and connected with a belt wheel, a mandrel penetrating through the tensioning arm, and a spring sleeved on the mandrel, wherein the mandrel is rotatably connected with the tensioning arm, the end part of the mandrel is fixedly connected in the base, the spring is positioned in the base, a coaxial damping sleeve is sleeved on the mandrel, the outer circular surface of the damping sleeve is attached to the inner side wall of the base and in interference fit with the inner side wall of the base, the outer circular surface of the damping sleeve is in a circular truncated cone shape, the area of the end surface, close to the tensioning arm, of the damping sleeve is larger than that of the end surface, far away from the tensioning arm, of the damping sleeve, the damping sleeve is fixedly connected with the tensioning arm, a lever supporting block and a lever bracket are arranged on one side, close to the base, of the tensioning arm is fixedly connected with the tensioning arm, and the spring comprises a first end surface, one end of the lever support abuts against the lever support block, the other end of the lever support abuts against a first end face of the spring, the damping sleeve comprises a thick wall section and a thin wall section, the outer side of the lever support abuts against the inner edge face of the thin wall section, the spring abuts against the inner edge face of the thick wall section, and a second end face of the spring is connected with the base. When the tensioning arm rotates, the damping sleeve and the base are in interference fit, so that a large friction force exists between the damping sleeve and the base, the friction force is uniform in the circumferential direction of the damping sleeve, when the spring is twisted, the spring expands towards the side far away from the mandrel, the spring applies pressure to the thick-wall section, meanwhile, the first end face of the spring applies pressure to the end portion of the lever support, the lever support is of an arc-shaped structure and deforms towards the thin-wall section under the action of the pressure, so that the pressure is applied to the thin-wall section, finally, the friction force between the thick-wall section and the damping sleeve is increased, meanwhile, the friction force between the thin-wall section and the damping sleeve is increased, the damping effect is further optimized, and meanwhile, the thick-wall section and the thin-wall. The thick wall section and the thin wall section are of an integrated structure. In addition, in order to enable the lever support to always abut against the tensioning arm, a supporting plate is additionally arranged on one side, away from the lever support, of the damping sleeve, the damping sleeve is a circular table top, the friction surface between the damping sleeve and the base is increased, and the damping performance is improved.
Preferably, the lever supporting block is provided with a clamping groove, a clamping block matched with the clamping groove is arranged on the inner side wall of the damping sleeve at a position corresponding to the clamping groove, the clamping block is located in the clamping groove, and the damping sleeve abuts against the tensioning arm. The fixture block is located the draw-in groove, and when the damping sleeve was rotatory, the draw-in groove was rotatory, drives the fixture block rotatory for damping sleeve and tensioning arm synchronous revolution, in addition, because the damping sleeve is the round platform shape, the damping sleeve supports and leans on the tensioning arm simultaneously, therefore the damping sleeve can not be along the axial motion of dabber, here through the cooperation of fixture block and draw-in groove, make damping sleeve and tensioning arm can not take place relative rotation, finally realize tensioning arm and damping telescopic rigid coupling.
Preferably, the bottom surface of the base is provided with a spring support block for supporting the spring so that the spring is twisted, and the second end surface of the spring abuts against an end of the spring support block. The spring support block provides a reaction force to the spring as it twists.
Preferably, the spring support block, the spring, the lever support block and the lever support are all located on the same cylindrical surface, one sides, close to the spring, of the spring support block, the lever support block and the lever support are all attached to the spring, the inner side of the damping sleeve is fixedly connected with the support plate, and one side, close to the tensioning arm, of the lever support abuts against the support plate. The spring support block, the lever support block and the lever support are all of circular arc structures, the height of the spring support block is gradually increased from one end of the spring support block to the other end of the spring support block, the height of the lever support block is gradually increased from one end of the lever support block to the other end of the lever support block, and the height of the lever support block is gradually increased from one end of the lever support block to the other end of the lever support block, wherein the. Finally, the spring support block, the lever support block and one side of the lever support close to the spring are attached to the spring. Therefore, the elastic force of the spring can be well transmitted to the base and the tensioning arm through the spring supporting block, the lever supporting block and the lever bracket, and the base and the tensioning arm can be uniformly stressed. Meanwhile, the spring can be ensured to be stably twisted, the lever support is extruded on the supporting plate by the spring, and the supporting plate plays a role in supporting the lever support.
Preferably, a force transmission block for transmitting the elastic force of the spring to the base is arranged on the bottom surface of the base, and the force transmission block abuts against the spring.
Preferably, the tensioning arm includes the main part, is located the boss that the main part is close to base one side, the main part is close to base one side and is equipped with and is the annular spacing groove of circle, the port and the spacing groove adaptation of base are located the spacing inslot, the boss is cylindrical and coaxial with the dabber, the dabber passes the boss, lever support inboard supports and leans on the outer disc of boss, the dabber is kept away from base one end rigid coupling and is used for squeezing the extrusion piece on the base with the tensioning arm. The limiting groove plays a role in limiting and sealing, and the boss is abutted against the lever bracket to play a role in supporting the lever bracket.
Preferably, at least two lug plates are fixedly connected to the outer side of the base, and the base is fixedly connected with the engine through the lug plates. The base is fixed to the engine by the lug plate.
The utility model has the advantages that: the utility model discloses the wearing and tearing of damping spare are even, and the damping is effectual, in addition, simple structure, stable performance.
Drawings
FIG. 1 is a schematic view of the present invention;
fig. 2 is a top view of the present invention;
FIG. 3 is a cross-sectional view A-A of FIG. 2;
FIG. 4 is a schematic view of a tensioning arm;
FIG. 5 is a schematic view of a base;
FIG. 6 is a schematic view of the damping sleeve after the lever bracket is placed on the support plate;
FIG. 7 is a schematic view of a damping sleeve;
FIG. 8 is a schematic view of a lever bracket;
fig. 9 is a schematic view of the spring and lever bracket after placement on the tensioning arm.
In the figure: the device comprises a base 1, a tensioning arm 2, a mandrel 3, a spring 4, a damping sleeve 5, a lever supporting block 6, a lever bracket 7, a first end face 8, a second end face 9, a thick-wall section 10, a thin-wall section 11, a spring supporting block 13, a clamping groove 14, a clamping block 15, a mandrel hole 16, a bushing 17, a force transmission block 18, a belt wheel 19, an ear plate 20, a main body 22, a limiting groove 23, a boss 24, an extrusion block 25 and a supporting plate 26.
Detailed Description
The invention will be further explained in detail with reference to the drawings and the following detailed description:
example (b): bonding
Referring to fig. 1 to 9, an automatic tensioner equipped with a circular damping sleeve comprises a base 1 fixedly connected to an engine, a tensioning arm 2 covering the base 1 and connected to a belt wheel 19, a mandrel 3 penetrating the tensioning arm 2, and a spring 4 sleeved on the mandrel 3, wherein at least two lug plates 20 are fixedly connected to the outer side of the base 1, the base 1 is fixedly connected to the engine through the lug plates 20, the mandrel 3 is rotatably connected to the tensioning arm 2, the tensioning arm 2 comprises a main body 22 and a boss 24 located on one side of the main body 22 close to the base 1, a circular limiting groove 23 is arranged on one side of the main body 22 close to the base 1, a port of the base 1 is matched with the limiting groove 23 and located in the limiting groove 23, the boss 24 is cylindrical and coaxial with the mandrel 3, the mandrel 3 passes through the boss 24, the end of the mandrel 3 is fixedly connected to the base 1, and the spring 4 is located in the base 1, the coaxial damping sleeve 5 is sleeved on the mandrel 3, the outer circular surface of the damping sleeve 5 is attached to the inner side wall of the base 1 and is in interference fit with the inner side wall of the base 1, the outer circular surface of the damping sleeve 5 is in a circular truncated cone shape, the area of the end face, close to the tensioning arm 2, of the damping sleeve 5 is larger than the area of the end face, far away from the tensioning arm 2, of the damping sleeve 5, the damping sleeve 5 is fixedly connected with the tensioning arm 2, a lever supporting block 6 and a lever bracket 7 are arranged on one side, close to the base 1, of the tensioning arm 2, the lever supporting block 6 is fixedly connected with the tensioning arm 2, the spring 4 comprises a first end face 8, close to the tensioning arm 2, and a second end face 9, far away from the tensioning arm 2, one end of the lever bracket 7 abuts against the lever supporting block 6, the other end of the lever bracket 7 abuts against the first, the outer side of the lever bracket 7 abuts against the inner edge surface of the thin-wall section 11, the inner side of the lever bracket 7 abuts against the outer circular surface of the boss 24, and for the lever bracket, the inner side refers to the side close to the mandrel 3, otherwise, the inner side is the outer side; and a pressing block 25 for pressing the tensioning arm 2 on the base 1 is fixedly connected to one end, away from the base 1, of the mandrel 3. The spring 4 is abutted against the inner edge surface of the thick wall section 10, the second end surface 9 of the spring 4 is fixedly connected with the base 1, the tensioning arm 2 is provided with a mandrel hole 16, the mandrel 3 is positioned in the mandrel hole 16, a coaxial bushing 17 is arranged in the mandrel hole 16, the bushing 17 is sleeved on the mandrel 3, the bushing 17 is in interference fit with the mandrel hole 16, the bushing 17 is in clearance fit with the mandrel 3, the lever supporting block 6 is provided with a clamping groove 14, the inner side wall of the damping sleeve 5 is provided with a clamping block 15 matched with the clamping groove 14 at the position corresponding to the clamping groove 14, the clamping block 15 is positioned in the clamping groove 14, the damping sleeve 5 is abutted against the tensioning arm 2, the base 1 is of a cup-shaped structure, the tensioning arm 2 is positioned at the cup mouth of the base 1, one side of the base 1, which is far away from the tensioning arm 2, is the bottom surface of the base 1, the second end surface 9 of the spring is abutted against the end part of the spring supporting block 13; the spring support block 13, the spring 4, the lever support block 6 and the lever support 7 are all located on the same cylindrical surface, one sides, close to the spring 4, of the spring support block 13, the lever support block 6 and the lever support 7 are all attached to the spring 4, a support plate is fixedly connected to the inner side of the damping sleeve, and one side, close to the tensioning arm, of the lever support abuts against a support plate 26; the bottom surface of the base is provided with a force transmission block 18 used for transmitting the elastic force of the spring 4 to the base 1, and the force transmission block 18 is abutted against the spring 4.
The principle of the embodiment is as follows:
the tensioner for the automobile engine is connected with the belt wheel and the engine, and mainly aims to enable the tension of a belt in a transmission system to meet design requirements, compensate tension change or attenuation caused by swinging of a tensioning arm due to belt abrasion, lengthening and engine rotating speed fluctuation, and further avoid belt slipping, noise and vibration; also, in order to effectively damp vibrations of the tensioner during operation, a damping device is generally used in the tensioner. The tension required in a pulley system is mainly provided by a helical spring in the tensioner and the damping force required to damp the vibration of the tensioner arm is mainly provided by a damping device in the tensioner. The damping device in the traditional automatic tensioner is a single damping piece or a double-damping piece damping device which is symmetrically arranged, the friction surface is small, the problem of uneven wear of the damping piece exists during working, and the working requirement of the tensioner cannot be well met.
In the embodiment, the base 1 is fixedly connected with an engine through the lug plate 20, the belt wheel 19 is connected with a belt, when the belt or the engine fluctuates, the tensioning arm 2 rotates, the base 1 rotates in the limiting groove 23, the bushing 17 and the mandrel 3 rotate relatively, the tensioning arm 2 and the mandrel 3 are separated by the bushing 17, and the durability of the tensioning arm 2 is improved; the spring 4 is pressed between the tensioning arm 2 and the base 1, the spring 4 twists to apply a reaction force to the tensioning arm 2, so that the swing of the tensioning arm 2 is reduced, in addition, the damping sleeve 5 is in interference fit with the base 1, the damping sleeve 5 and the tensioning arm 2 synchronously rotate due to the fit of the clamping block 15 and the clamping groove 14, the friction force between the damping sleeve 5 and the base 1 works to play a role in energy dissipation and further reduce the swing of the tensioning arm 2, and the spring 4 generates a larger pressure on the thick-wall section 10 due to the twisting of the spring 4, so that the friction force between the thick-wall section 10 and the inner side wall of the base 1 is greatly increased, on the other hand, the lever support 7 abuts against the first end face 8 of the spring 4, when the spring twists, the lever support deforms under the action of the spring, and the lever support 7 applies a larger pressure on the thin-wall section 11, therefore, the friction force between the thin-wall section 11 and the inner side wall of the base 1 is greatly increased, in sum, the friction force between the thick-wall section 10, the thin-wall section 11 and the inner side wall of the base 1 is increased simultaneously, and the abrasion of the outer circular surface of the damping sleeve 5 is uniform while the swing of the tensioning arm 2 is reduced.
Claims (7)
1. An automatic tensioner with a circular damping sleeve comprises a base fixedly connected to an engine, a tensioning arm covered on the base and connected with a belt wheel, a mandrel penetrating through the tensioning arm, and a spring sleeved on the mandrel, wherein the mandrel is rotatably connected with the tensioning arm, the end part of the mandrel is fixedly connected in the base, and the spring is positioned in the base, and the automatic tensioner is characterized in that the mandrel is sleeved with a coaxial damping sleeve, the outer circular surface of the damping sleeve is attached to the inner side wall of the base and in interference fit with the inner side wall of the base, the outer circular surface of the damping sleeve is in a circular truncated cone shape, the area of the end surface, close to the tensioning arm, of the damping sleeve is larger than the area of the end surface, far away from the tensioning arm, of the damping sleeve, the damping sleeve is fixedly connected with the tensioning arm, one side, close to the base, of the tensioning arm is provided with a, the damping sleeve comprises a thick wall section and a thin wall section, the outer side of the lever support abuts against the inner edge surface of the thin wall section, the spring abuts against the inner edge surface of the thick wall section, and the second end surface of the spring is connected with the base.
2. The automatic tensioner as claimed in claim 1, wherein the lever support block is provided with a slot, the inner sidewall of the damping sleeve is provided with a block fitting with the slot at a position corresponding to the slot, the block is located in the slot, and the damping sleeve abuts against the tensioning arm.
3. The automatic tensioner as claimed in claim 1, wherein the base has a bottom surface provided with a spring support block for supporting the spring so that the spring is twisted, and the second end surface of the spring abuts against an end of the spring support block.
4. The automatic tensioner with the round damping sleeve as claimed in claim 3, wherein the spring support block, the spring, the lever support block and the lever support are all located on the same cylindrical surface, one side of the spring support block, one side of the lever support block, which is close to the spring, are all attached to the spring, a support plate is fixedly connected to the inner side of the damping sleeve, and one side of the lever support block, which is close to the tensioning arm, abuts against the support plate.
5. The automatic tensioner as claimed in claim 3, wherein the base has a force-transmitting block on a bottom surface thereof for transmitting the elastic force of the spring to the base, the force-transmitting block abutting against the spring.
6. The automatic tensioner with the circular damping sleeve as claimed in claim 1, wherein the tensioning arm comprises a main body and a boss located on one side of the main body close to the base, a circular limiting groove is formed in one side of the main body close to the base, a port of the base is matched with the limiting groove and located in the limiting groove, the boss is cylindrical and coaxial with the mandrel, the mandrel penetrates through the boss, the inner side of the lever support abuts against the outer circular surface of the boss, and a pressing block for pressing the tensioning arm onto the base is fixedly connected to one end of the mandrel, which is far away from the base.
7. The automatic tensioner as claimed in claim 1, 2, 3, 4, 5 or 6, wherein the base is fixedly connected to the engine through at least two lug plates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921667415.9U CN210889943U (en) | 2019-09-30 | 2019-09-30 | Automatic tensioner with circular damping sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921667415.9U CN210889943U (en) | 2019-09-30 | 2019-09-30 | Automatic tensioner with circular damping sleeve |
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| Publication Number | Publication Date |
|---|---|
| CN210889943U true CN210889943U (en) | 2020-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921667415.9U Active CN210889943U (en) | 2019-09-30 | 2019-09-30 | Automatic tensioner with circular damping sleeve |
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| CN (1) | CN210889943U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111207192A (en) * | 2019-09-30 | 2020-05-29 | 宁波丰茂远东橡胶有限公司 | Automatic tensioner with circular damping sleeve |
| CN113102220A (en) * | 2021-06-16 | 2021-07-13 | 新沂市新南环保产业技术研究院有限公司 | Separating device for fluorescent powder |
-
2019
- 2019-09-30 CN CN201921667415.9U patent/CN210889943U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111207192A (en) * | 2019-09-30 | 2020-05-29 | 宁波丰茂远东橡胶有限公司 | Automatic tensioner with circular damping sleeve |
| CN111207192B (en) * | 2019-09-30 | 2021-01-15 | 宁波丰茂远东橡胶有限公司 | Automatic tensioner with circular damping sleeve |
| CN113102220A (en) * | 2021-06-16 | 2021-07-13 | 新沂市新南环保产业技术研究院有限公司 | Separating device for fluorescent powder |
| CN113102220B (en) * | 2021-06-16 | 2021-09-17 | 新沂市新南环保产业技术研究院有限公司 | Separating device for fluorescent powder |
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Address after: No.22, Jinfeng Road, Lianghui Development West District, Yuyao City, Ningbo City, Zhejiang Province, 315400 Patentee after: Zhejiang Fengmao Technology Co.,Ltd. Address before: No.22, Jinfeng Road, Lianghui Development West District, Yuyao City, Ningbo City, Zhejiang Province, 315400 Patentee before: Ningbo Fengmao Far-East Rubber Co.,Ltd. |