Novel tensioner

Abstract

The utility model provides a novel tensioner, and belongs to the technical field of machinery. The problems that the unlocking process of an existing tensioner is very inconvenient, and later replacement is troublesome are solved. The novel tensioner comprises a main body, a one-way valve, a spring, a supporting shaft and a plunger are arranged in the main body, the spring is arranged in the plunger and abuts against the one-way valve and the supporting shaft respectively, an elastic cavity is formed between the inner end of the plunger and the main body, the outer end of the plunger extends out of the main body, an unlocking clamping ring is arranged between the plunger and the main body, and a blocking table part protruding outwards in the radial direction is arranged on the inner wall of the main body. A chamfer for limiting the unlocking clamping ring is formed in the inner end edge of the blocking table part, a clamping groove for containing the unlocking clamping ring is formed in the inner wall of the body, a positioning groove for positioning and installing the unlocking clamping ring is formed in the plunger, and an unlocking groove for the unlocking clamping ring to fall into is formed in the position, adjacent to the positioning groove, of the plunger. And the opening depth of the unlocking groove is greater than that of the positioning groove. The utility model has the advantages of quick unlocking, convenience in unlocking, and convenience in disassembly, assembly and replacement.

Description

Technical Field

[0001] The utility model belongs to the technical field of machinery and relates to a tensioner, in particular to a novel tensioner. Background Art

[0002] The tensioner is used to keep the chain or timing belt in a certain tension even when it is loosened due to stretching or wear during use. The tensioner usually needs to be unlocked before it can be used normally. The tensioner on the market is usually installed with a latch. First, the tensioner is inserted into the engine and installed. When unlocking, the latch needs to be pulled out before use. However, when the engine cylinder head is installed, it is impossible to reach into the engine to pull out the latch. The unlocking process is very inconvenient and it is also very troublesome to replace it later. Summary of the invention

[0003] The utility model aims to solve the above problems existing in the prior art and provides a novel tensioner which can be installed from the outside to the inside and can be quickly installed, quickly unlocked and conveniently unlocked.

[0004] The objectives of the utility model can be achieved through the following technical solutions: a new type of tensioner, characterized in that it includes a main body, a one-way valve, a spring, a support shaft and a plunger are arranged in the main body, the spring is arranged in the plunger and respectively abuts against the one-way valve and the support shaft, an elastic cavity is provided between the inner end of the plunger and the main body, the outer end of the plunger extends out of the main body, an unlocking collar is provided between the plunger and the main body, a radially outwardly convex baffle portion is provided on the inner wall of the main body, a chamfer for limiting the unlocking collar is provided at the inner end edge of the baffle portion, a clamping groove for accommodating the unlocking collar is provided on the inner wall of the main body, a positioning groove for positioning and installing the unlocking collar is provided on the plunger, an unlocking groove for the unlocking collar to fall into is provided at a position adjacent to the positioning groove on the plunger, and the opening depth of the unlocking groove is greater than the opening depth of the positioning groove, and the diameter of the unlocking collar is smaller than the distance difference between the baffle portion and the unlocking groove.

[0005] In the above-mentioned novel tensioner, a retaining spring is also provided on the plunger, and a plurality of check grooves are formed at intervals on the peripheral wall of the plunger.

[0006] In the above-mentioned novel tensioner, the inner wall of the main body is provided with a limit platform for blocking the retaining spring.

[0007] In the above-mentioned novel tensioner, a retaining ring is provided at the end of the plunger extending out of the main body.

[0008] In the above-mentioned novel tensioner, a plurality of sealing rings are provided on the main body.

[0009] Compared with the prior art, the novel tensioner has the advantages of quick unlocking, convenient unlocking, and convenient disassembly and replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a three-dimensional diagram of the novel tensioner.

[0011] Figure 2 It is a cross-sectional view of the novel tensioner.

[0012] Figure 3 This is the state diagram after the unlocking collar is unlocked.

[0013] In the figure, 1. main body; 2. one-way valve; 3. spring; 4. supporting shaft; 5. plunger; 6. elastic chamber; 7. unlocking clamp ring; 8. stop platform; 9. chamfer; 10. clamping groove; 11. positioning groove; 12. unlocking groove; 13. retaining spring; 14. check groove; 15. limit platform; 16. retaining ring; 17. sealing ring. DETAILED DESCRIPTION

[0014] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0015] like Figure 1 , Figure 2 , Figure 3As shown, the novel tensioner comprises a main body 1, which is connected from the outside to the inside and installed into the engine, wherein a one-way valve 2, a spring 3, a support shaft 4 and a plunger 5 are arranged in the main body 1, wherein the spring 3 is arranged in the plunger 5 and respectively abuts against the one-way valve 2 and the support shaft 4, wherein an elastic cavity 6 is arranged between the inner end of the plunger 5 and the main body 1, wherein the outer end of the plunger 5 extends out of the main body 1, wherein an unlocking collar 7 is arranged between the plunger 5 and the main body 1, wherein a radially outwardly protruding stopper portion 8 is arranged at the inner wall of the main body 1, wherein a chamfer 9 for limiting the position of the unlocking collar 7 is arranged at the inner end edge of the stopper portion 8, wherein a clamping groove 10 for accommodating the unlocking collar 7 is arranged at the inner wall of the main body 1, wherein a positioning groove 11 for positioning and installing the unlocking collar 7 is arranged on the plunger 5, wherein before the tensioner is unlocked, the unlocking collar 7 is located in the clamping groove 10 and abuts against the chamfer 9, wherein the diameter of the unlocking collar 7 is larger than the inner diameter between the chamfer 9 and the positioning groove 11 The diameter difference limits the unlocking collar 7, and an unlocking groove 12 for the unlocking collar 7 to fall into is provided at the position adjacent to the positioning groove 11 on the plunger 5, and the opening depth of the unlocking groove 12 is greater than the opening depth of the positioning groove 11, and the diameter of the unlocking collar 7 is smaller than the distance difference between the stop plate 8 and the unlocking groove 12. The main body 1 is installed into the engine from the outside to the inside and abuts against the corresponding wall surface, and the wall surface acts as an antagonistic force to counter-press the plunger 5. Due to the existence of the elastic cavity 6, under the action of the spring 3, the plunger 5 moves inward, so that the unlocking collar 7 that was originally limited falls into the unlocking groove 12. After the connection is completed, the plunger 5 reaches the corresponding working position, and the unlocking collar 7 is driven by the unlocking groove 12 to break away from the originally stuck position. Under the effect that the diameter of the unlocking collar 7 is smaller than the distance difference between the stop plate 8 and the unlocking groove 12, the plunger 5 can work and the tensioner is unlocked.

[0016] To elaborate further, a retaining spring 13 is also provided on the plunger 5, and a plurality of check grooves 14 are formed at intervals on the peripheral wall of the plunger 5. A limit platform 15 is provided on the inner wall of the main body 1 for blocking the retaining spring 13. When the timing chain elongates under the action of tension, high temperature and wear, the plunger 5 will continue to extend outward with the elongation of the timing chain. For each extension, the corresponding check groove 14 corresponds to the position of the retaining spring 13, and the retaining spring 13 is limited and will not fall off. When it reaches the last check groove 14, it indicates that the plunger 5 has extended to the final position, indicating that the tensioner can be replaced.

[0017] To be more specific, a retaining ring 16 is provided at the end of the plunger 5 extending out of the main body 1, and the retaining ring 16 needs to be removed before the tensioner is installed and used.

[0018] Preferably, a plurality of sealing rings 17 are provided on the main body 1 .

[0019] When disassembling, only the main body 1 needs to be taken out, and the connection mode of the main body 1 can be a threaded connection mode.

[0020] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0021] Although the terms such as main body 1, one-way valve 2, spring 3, support shaft 4, plunger 5, elastic chamber 6, unlocking collar 7, stopper 8, chamfer 9, clamping groove 10, positioning groove 11, unlocking groove 12, retaining spring 13, check groove 14, limiter 15, retaining ring 16, sealing ring 17 are used more frequently in this article, the possibility of using other terms is not excluded. The use of these terms is only for more convenient description and explanation of the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A new type of tensioner, characterized in that: The invention comprises a main body (1), wherein a one-way valve (2), a spring (3), a support shaft (4) and a plunger (5) are arranged in the main body (1), wherein the spring (3) is arranged in the plunger (5) and abuts against the one-way valve (2) and the support shaft (4) respectively, wherein an elastic cavity (6) is provided between the inner end of the plunger (5) and the main body (1), wherein the outer end of the plunger (5) extends out of the main body (1), wherein an unlocking collar (7) is provided between the plunger (5) and the main body (1), wherein the inner wall of the main body (1) comprises a radially outwardly protruding stopper portion (8), wherein the inner end edge of the stopper portion (8) is provided with a stopper portion (8) protruding radially outwardly. A chamfer (9) is provided for limiting the position of the unlocking collar (7); a groove (10) for accommodating the unlocking collar (7) is provided on the inner wall of the main body (1); a positioning groove (11) for positioning and installing the unlocking collar (7) is provided on the plunger (5); an unlocking groove (12) for the unlocking collar (7) to fall into is provided at a position adjacent to the positioning groove (11) on the plunger (5); the opening depth of the unlocking groove (12) is greater than the opening depth of the positioning groove (11); and the diameter of the unlocking collar (7) is smaller than the distance difference between the retaining platform (8) and the unlocking groove (12).

2. A novel tensioner according to claim 1, characterized in that: The plunger (5) is also provided with a retaining ring (13), and a plurality of check grooves (14) are formed at intervals on the peripheral wall of the plunger (5).

3. A novel tensioner according to claim 1, characterized in that: The inner wall of the main body (1) is provided with a limit platform (15) for blocking the retaining spring (13).

4. A novel tensioner according to claim 1, characterized in that: The end of the plunger (5) extending outside the main body (1) is provided with a retaining ring (16).

5. A novel tensioner according to claim 1, characterized in that: The main body (1) is provided with a plurality of sealing rings (17).

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