CN220015968U - Spring tensioner - Google Patents
Spring tensioner Download PDFInfo
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- CN220015968U CN220015968U CN202320584280.XU CN202320584280U CN220015968U CN 220015968 U CN220015968 U CN 220015968U CN 202320584280 U CN202320584280 U CN 202320584280U CN 220015968 U CN220015968 U CN 220015968U
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- guide rod
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- 230000002035 prolonged effect Effects 0.000 description 6
- 239000004033 plastic Substances 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000007789 sealing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model provides a spring tensioner, and belongs to the field of automobile accessories. It has solved the not good problem of current tensioner life-span. The spring tensioner comprises a lower arm and an upper arm with a mandrel, wherein the upper end of the lower arm is annular and sleeved on the mandrel, the upper end of the lower arm is connected with the upper arm through a torsion spring, the lower end of the lower arm is provided with a lower roller and an adjusting mechanism, and the adjusting mechanism comprises a cylinder body and a guide rod axially and slidably arranged in the cylinder body along the cylinder body; the axis of the cylinder body and the axis of the mandrel are vertically arranged, the lower end of the cylinder body is hinged with the lower arm through a horizontally arranged shaft piece, and the axis of the shaft piece and the axis of the mandrel are arranged in parallel; the upper end of the guide rod extends out of the cylinder body and is provided with a driving hole which is penetrated through along the axial direction of the shaft, the upper end of the guide rod is sleeved with a spring, the spring is positioned between the driving hole and the cylinder body, two ends of the spring respectively act on the outer wall of the guide rod and the cylinder body, and a limiting structure which limits the guide rod to be completely separated from the cylinder body is arranged between the cylinder body and the guide rod. The spring tensioner has long service life.
Description
Technical Field
The utility model belongs to the field of automobile accessories, and relates to a tensioner, in particular to a spring tensioner.
Background
The tensioner acts on a timing belt or a timing chain of the engine to guide and tension the engine, so that the engine is always in an optimal tension state.
The utility model provides a hydraulic tensioner (application number: 201820154484.9) that present tensioner was put forward before like the applicant, including being banding upper arm and locating the plastic wheel and the oil cup of upper arm both sides respectively, plastic wheel and the upper end of upper arm rotate and be connected, and the oil cup links firmly with the lower extreme of upper arm mutually, the middle part of upper arm along the distribution direction of plastic wheel and oil cup run through and seted up the mounting hole, and install in the mounting hole and be hollow dabber, the oil cup be equipped with rings plunger outward, and rings plunger and oil cup central axis collineation between them, rings plunger constitute by rings portion and plunger portion, plunger portion insert in the oil cup, plunger portion and oil cup sliding connection so that the plunger portion can be followed the axial slip of oil cup, plunger portion pass through rubber sleeve and oil cup sealing connection, plunger portion overcoat have the spring, and the both ends of spring offset with the inner wall and the oil cup respectively, rings portion on have the connecting portion that are the tube-shape, and connecting portion cover is in the spring outer, rings portion connecting to the annular oil seal, the annular oil seal is formed between the oil seal and the oil chamber is connected to the annular oil seal and the oil seal is formed to the annular oil seal between the oil chamber and the oil seal.
When the tensioner acts, the rubber body frequently stretches and contracts, fatigue and aging are easy to occur, and oil leakage is caused.
Disclosure of Invention
The utility model aims to solve the problems in the prior art and provides a spring tensioner with long service life.
The aim of the utility model can be achieved by the following technical scheme: the spring tensioner comprises a lower arm and an upper arm with a mandrel, wherein the upper end of the lower arm is annular and sleeved on the mandrel, the upper end of the lower arm is connected with the upper arm through a torsion spring, and the lower end of the lower arm is provided with a lower roller and an adjusting mechanism; the axis of the cylinder body and the axis of the mandrel are vertically arranged, the lower end of the cylinder body is hinged with the lower arm through a horizontally arranged shaft piece, and the axis of the shaft piece and the axis of the mandrel are arranged in parallel; the upper end of the guide rod extends out of the cylinder body, the upper end of the guide rod is provided with a driving hole which penetrates through the shaft part in the axial direction, the upper end of the guide rod is sleeved with a spring, the spring is positioned between the driving hole and the cylinder body, two ends of the spring respectively act on the outer wall of the guide rod and the cylinder body, and a limiting structure which limits the guide rod to be completely separated from the cylinder body is arranged between the cylinder body and the guide rod.
When in tensioning, the shaft body arranged in the driving hole forces the guide rod to retract into the cylinder body against the elasticity of the spring so as to drive the lower arm to rotate around the mandrel against the torsion of the torsion spring, so that the peripheral surface of the lower roller is more attached to the belt; after the use, the lower arm and the guide rod are reset under the action of the torsion spring and the spring respectively.
The tensioner replaces the existing hydraulic rod by the matching of the cylinder body, the guide rod, the limiting structure and the spring, and the fatigue resistance of the spring serving as a power source is obviously higher than that of the hydraulic rod, so that the service life of the adjusting mechanism can be effectively prolonged, and the service life of the tensioner is prolonged.
In the spring tensioner, the annular seat is coaxially formed on the outer wall of the upper end of the guide rod, and the upper end of the spring is pressed on the annular seat so as to stably support the spring and ensure the stable work of the tensioner.
In the spring tensioner, the limiting structure comprises a strip-shaped groove penetrating through the side wall of the cylinder body, the length of the strip-shaped groove extends along the axial direction of the cylinder body, the upper end of the strip-shaped groove is closed, a limiting rod matched with the strip-shaped groove is arranged at the lower end of the guide rod, and one end of the limiting rod is inserted into the strip-shaped groove. The limiting rod is contacted with the upper end surface of the strip-shaped groove and used for limiting the upward sliding distance of the guide rod, and the device has the advantages of simple structure and stable work.
In the spring tensioner, the cylinder body is of an integrated structure, so that the strength of the cylinder body is effectively ensured.
In the spring tensioner, the lower end of the strip-shaped groove is in a closed shape, and the limiting rod and the guide rod are in a split structure.
In the spring tensioner, the jack matched with the limiting rod is arranged on the guide rod, and one end of the limiting rod is inserted into the jack, so that the spring tensioner has the advantages of being simple in structure and convenient to assemble.
In the spring tensioner, two strip-shaped grooves are symmetrically arranged along the center of the cylinder body, the insertion holes are formed in a penetrating mode, and two ends of the guide rod are respectively inserted into the two strip-shaped grooves, so that the working stability of the tensioner is further improved.
In the spring tensioner, the two end faces of the bar-shaped groove are arc-shaped, and the cross section of the limiting rod is circular matched with the end face of the bar-shaped groove, so that the limiting area is increased, and the guide rod is more stably limited.
In the spring tensioner, the cylinder body protrudes outwards from the position of the strip-shaped groove to form the convex rings with the shape and the size matched with the strip-shaped groove, the convex rings and the strip-shaped groove are the same in number and correspond to each other in position, and two ends of the limiting rod extend into the two convex rings respectively. The convex ring is designed to form a function similar to a reinforcing rib, strengthen the strength of the cylinder body, and strengthen the thickness of the contact part of the limiting rod and the cylinder body so as to better limit the moving distance of the guide rod.
In the spring tensioner, the shaft member is a bolt, the lower end face of the cylinder body is provided with a convex sheet-shaped connecting part, the connecting part is attached to the lower arm, the bolt rod part sequentially penetrates through the connecting part and the lower arm and is screwed with a nut, and the head of the bolt and the nut are respectively pressed on the connecting part and the lower arm.
Compared with the prior art, the spring tensioner has the following advantages:
1. the tensioner replaces the existing hydraulic rod by the matching of the cylinder body, the guide rod, the limiting structure and the spring, and the fatigue resistance of the spring serving as a power source is obviously higher than that of the hydraulic rod, so that the service life of the adjusting mechanism can be effectively prolonged, and the service life of the tensioner is prolonged.
2. The convex ring is designed to form a function similar to a reinforcing rib, strengthen the strength of the cylinder body, and strengthen the thickness of the contact part of the limiting rod and the cylinder body so as to better limit the moving distance of the guide rod.
Drawings
Fig. 1 is a left side view of the spring tensioner.
FIG. 2 is a schematic cross-sectional view of the present spring tensioner.
In the figure, 1, upper arm; 1a, a mandrel; 2. a lower arm; 3. a torsion spring; 4. an upper roller; 5. a set screw; 6. a lower roller; 7. a guide rod; 7a, a driving hole; 7b, an annular seat; 8. a shaft member; 9. a spring; 10. a cylinder; 10a, a strip-shaped groove; 10b, a convex ring; 10c, a connecting part; 11. and a limit rod.
Detailed Description
The following are specific embodiments of the present utility model and the technical solutions of the present utility model will be further described with reference to the accompanying drawings, but the present utility model is not limited to these embodiments.
Example 1
As shown in fig. 1 and 2, the present spring tensioner includes an upper arm 1 having a spindle 1a and a lower arm 2 provided on the left side of the upper arm 1.
Wherein,
the upper end of the lower arm 2 is annular and sleeved on the mandrel 1a, an annular cavity coaxial with the mandrel 1a is formed between the upper end of the lower arm 2 and the upper arm 1, a torsion spring 3 is arranged in the annular cavity, and two ends of the torsion spring 3 are fixedly connected with the upper arm 1 and the lower arm 2 respectively. In an actual product, a mandrel 1a is hollow, an upper roller 4 is sleeved at the left end of the mandrel 1a, the upper roller 4 is rotatably supported on the mandrel 1a through an upper bearing, a set screw 5 is arranged in the mandrel 1a in a penetrating manner and used for integrally mounting a tensioner, and at the moment, the head of the set screw 5 is pressed on the right end of an inner ring of the upper bearing.
The lower end of the lower arm 2 is provided with a lower roller 6 and an adjusting mechanism, and the lower roller 6 and the adjusting mechanism are both positioned at the left side of the lower arm 2 and are distributed front and back. Wherein, the axes of the lower roller 6 and the mandrel 1a are parallel, and the lower roller 6 is rotatably supported on the lower arm 2 through a lower bearing. As shown in fig. 2, the adjustment mechanism includes a cylinder 10 and a guide rod 7 provided in the cylinder 10 so as to slide in the axial direction of the cylinder 10. Wherein, the axes of the cylinder body 10 and the mandrel 1a are vertically arranged, the lower end of the cylinder body 10 is hinged with the lower arm 2 through a shaft element 8 which is horizontally arranged, and the axes of the shaft element 8 and the mandrel 1a are parallel; the upper end of the guide rod 7 extends out of the cylinder 10, the upper end of the guide rod 7 is provided with a driving hole 7a which is penetrated and arranged along the axial direction of the shaft 8, a spring 9 is sleeved outside the upper end of the guide rod 7, the spring 9 is positioned between the driving hole 7a and the cylinder 10, two ends of the spring 9 respectively act on the outer wall of the guide rod 7 and the cylinder 10, and a limiting structure which limits the guide rod 7 to be completely separated from the cylinder 10 is arranged between the cylinder 10 and the guide rod 7.
When in tensioning, the shaft body arranged in the driving hole 7a forces the guide rod 7 to retract into the cylinder body 10 against the elastic force of the spring 9 so as to drive the lower arm 2 to rotate around the mandrel 1a against the torsion of the torsion spring 3, so that the peripheral surface of the lower roller 6 is more attached to the belt; after the use, the lower arm 2 and the guide rod 7 are reset under the action of the torsion spring 3 and the spring 9 respectively.
The tensioner replaces the existing hydraulic rod by the matching of the cylinder body 10, the guide rod 7, the limiting structure and the spring 9, and the fatigue resistance of the spring 9 serving as a power source is obviously higher than that of the hydraulic rod, so that the service life of the adjusting mechanism can be effectively prolonged, and the service life of the tensioner is prolonged.
In the present embodiment of the present utility model, in the present embodiment,
an annular seat 7b is coaxially formed on the outer wall of the upper end of the guide rod 7, and the upper end of the spring 9 is pressed on the annular seat 7b to stably support the spring 9, so that the tensioner can work stably.
The limiting structure is as follows: the guide rod comprises a bar-shaped groove 10a penetrating through the side wall of the cylinder body 10, the length of the bar-shaped groove 10a extends along the axial direction of the cylinder body 10, the upper end of the bar-shaped groove 10a is closed, a limit rod 11 matched with the bar-shaped groove 10a is arranged at the lower end of the guide rod 7, and one end of the limit rod 11 is inserted into the bar-shaped groove 10 a. The limiting rod 11 is contacted with the upper end face of the strip-shaped groove 10a and used for limiting the upward sliding distance of the guide rod 7, and the device has the advantages of being simple in structure and stable in work. Further, the barrel 10 is of an integral structure, the lower end of the bar-shaped groove 10a is sealed to effectively ensure the strength of the barrel 10, the limiting rod 11 and the guide rod 7 are of a split structure, specifically, the guide rod 7 is provided with an insertion hole matched with the limiting rod 11, and one end of the limiting rod 11 is inserted into the insertion hole.
Furthermore, both end surfaces of the bar-shaped groove 10a are arc-shaped, and the cross section of the limiting rod 11 is round matched with the end surface of the bar-shaped groove 10a, so that the limiting area is increased, and the guide rod 7 is more stably limited. The two strip-shaped grooves 10a are symmetrically arranged along the center of the cylinder body 10, at the moment, the insertion holes are arranged in a penetrating mode, and two ends of the guide rod 7 are respectively inserted into the two strip-shaped grooves 10a, so that the working stability of the tensioner is further improved. As shown in fig. 1, the cylinder 10 protrudes outwards from the position of the bar-shaped groove 10a to form convex rings 10b with the shape and size matched with the bar-shaped groove 10a, the convex rings 10b and the bar-shaped groove 10a are the same in number and correspond to each other in position, and two ends of the limiting rod 11 extend into the two convex rings 10b respectively. The convex ring 10b is designed to form a function similar to a reinforcing rib, strengthen the strength of the cylinder body 10, and strengthen the thickness of the contact part of the limiting rod 11 and the cylinder body 10 so as to better limit the moving distance of the guide rod 7.
The shaft 8 is constructed as follows: the shaft 8 is a bolt, the lower end face of the cylinder 10 is provided with a convex sheet-shaped connecting part 10c, the connecting part 10c is attached to the lower arm 2, the bolt rod part sequentially passes through the connecting part 10c and the lower arm 2 and is screwed with a nut, and the head of the bolt and the nut are respectively pressed on the connecting part 10c and the lower arm 2.
Example two
The structure and principle of the second embodiment are basically the same as those of the first embodiment, except that: the limiting structure comprises an annular limiting seat formed on the outer wall of the lower end of the guide rod 7 and a limiting ring fixed in the upper end of the cylinder body 10, wherein the limiting ring is sleeved outside the guide rod 7, and the inner diameter of the limiting ring is smaller than the outer diameter of the limiting seat.
The specific embodiments described herein are offered by way of example only to illustrate the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the utility model or exceeding the scope of the utility model as defined in the accompanying claims.
Claims (10)
1. The spring tensioner comprises a lower arm (2) and an upper arm (1) with a mandrel (1 a), wherein the upper end of the lower arm (2) is annular and sleeved on the mandrel (1 a), the upper end of the lower arm (2) is connected with the upper arm (1) through a torsion spring (3), and the lower end of the lower arm (2) is provided with a lower roller (6) and an adjusting mechanism, and the spring tensioner is characterized in that the adjusting mechanism comprises a cylinder (10) and a guide rod (7) axially and slidably arranged in the cylinder (10) along the cylinder (10); the axis of the cylinder body (10) and the axis of the mandrel (1 a) are vertically arranged, the lower end of the cylinder body (10) is hinged with the lower arm (2) through a shaft piece (8) which is horizontally arranged, and the axis of the shaft piece (8) and the axis of the mandrel (1 a) are arranged in parallel; the upper end of the guide rod (7) extends out of the cylinder body (10), a driving hole (7 a) axially penetrating through the shaft (8) is formed in the upper end of the guide rod (7), a spring (9) is sleeved outside the upper end of the guide rod (7), the spring (9) is located between the driving hole (7 a) and the cylinder body (10), two ends of the spring (9) respectively act on the outer wall of the guide rod (7) and the cylinder body (10), and a limiting structure for limiting the guide rod (7) to be completely separated from the cylinder body (10) is arranged between the cylinder body (10) and the guide rod (7).
2. Spring tensioner according to claim 1, characterized in that the outer wall of the upper end of the guide rod (7) is formed with an annular seat (7 b) coaxially and the upper end of the spring (9) is pressed against the annular seat (7 b).
3. Spring tensioner according to claim 1 or 2, characterized in that the limit structure comprises a bar-shaped groove (10 a) penetrating through the side wall of the cylinder (10), the length of the bar-shaped groove (10 a) extends along the axial direction of the cylinder (10), the upper end of the bar-shaped groove (10 a) is closed, the lower end of the guide rod (7) is provided with a limit rod (11) matched with the bar-shaped groove (10 a), and one end of the limit rod (11) is inserted into the bar-shaped groove (10 a).
4. A spring tensioner according to claim 3, characterised in that the barrel (10) is of unitary construction.
5. The spring tensioner according to claim 4, wherein the lower end of the bar-shaped groove (10 a) is closed, and the limit lever (11) and the guide rod (7) are of a split type structure.
6. The spring tensioner according to claim 5, wherein the guide rod (7) is provided with a socket matching with the limit rod (11), and one end of the limit rod (11) is inserted into the socket.
7. The spring tensioner according to claim 6, wherein the number of the bar-shaped grooves (10 a) is two, the bar-shaped grooves are symmetrically arranged along the center of the cylinder (10), the insertion holes are arranged in a penetrating manner, and two ends of the guide rod (7) are respectively inserted into the two bar-shaped grooves (10 a).
8. Spring tensioner according to claim 7, characterized in that the two end faces of the bar-shaped groove (10 a) are circular, and the cross section of the stop lever (11) is circular matching the end face of the bar-shaped groove (10 a).
9. The spring tensioner according to claim 8, wherein the cylinder (10) is formed by protruding a convex ring (10 b) with a shape and a size which are matched with those of the strip-shaped groove (10 a) outwards from the position of the strip-shaped groove (10 a), the convex rings (10 b) and the strip-shaped groove (10 a) are the same in number and correspond to each other in position one by one, and two ends of the limiting rod (11) extend into the two convex rings (10 b) respectively.
10. The spring tensioner according to claim 1, wherein the shaft member (8) is a bolt, the lower end surface of the cylinder body (10) is provided with a protruding sheet-shaped connecting portion (10 c), the connecting portion (10 c) is attached to the lower arm (2), the bolt shaft portion sequentially passes through the connecting portion (10 c) and the lower arm (2) and is screwed with a nut, and the bolt head and the nut are respectively pressed against the connecting portion (10 c) and the lower arm (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320584280.XU CN220015968U (en) | 2023-03-23 | 2023-03-23 | Spring tensioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320584280.XU CN220015968U (en) | 2023-03-23 | 2023-03-23 | Spring tensioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220015968U true CN220015968U (en) | 2023-11-14 |
Family
ID=88679226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320584280.XU Active CN220015968U (en) | 2023-03-23 | 2023-03-23 | Spring tensioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220015968U (en) |
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2023
- 2023-03-23 CN CN202320584280.XU patent/CN220015968U/en active Active
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