Motorcycle hydraulic tensioner positioning structure

Abstract

The utility model belongs to a motorcycle hydraulic tensioner positioning structure in the technical field of motorcycle parts. The motorcycle hydraulic tensioner positioning structure comprises a shell (1), a piston (3) is movably sleeved in the shell (1) from an opening end (2) at one end, an opening part (4) is arranged on the shell (1) close to the opening end (2), a concave shell ring groove (5) is arranged on the inner wall of the shell (1) close to the opening end (2), a concave piston ring groove (6) is arranged on an outer ring of the piston (3) close to the opening end (2), and the motorcycle hydraulic tensioner positioning structure further comprises a clamp spring (7). The motorcycle hydraulic tensioner positioning structure is simple in structure, in the transportation process of a motorcycle tensioner, it is guaranteed that the shell and the piston are reliably combined together, the problem that the shell and the piston fall off cannot occur, and normal transportation is guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of motorcycle parts technology, and more specifically, it relates to a positioning structure for a motorcycle hydraulic tensioner. Background Technology

[0002] During the transport of motorcycle tensioners, it is necessary to ensure that the housing and piston are assembled together. However, the housing and piston are not fixedly connected at this time. If the vehicle experiences bumps or vibrations, the piston may detach from the housing, causing the housing and piston to become disassembled. This problem affects the normal transport of motorcycle tensioners.

[0003] Existing technology includes a hydraulic tensioner for motorcycles, with publication number CN218172503U. This technology, belonging to the field of tensioning technology, solves the problem of insensitive pressure relief response. It comprises an inner sleeve with an oil inlet channel, a top sleeve fitted over one end of the inner sleeve, and an elastic core assembly located within the top sleeve that blocks the outlet of the oil inlet channel under its own elastic force. A pressure relief gap is provided between the outer peripheral wall of the inner sleeve and the inner peripheral wall of the top sleeve. The inner side of the top sleeve has a blocking part, and the outer side of the inner sleeve located within the top sleeve has an annular groove with a locking member fixed within it. The locking member includes several arc-shaped limiting parts and a smooth transition part fixedly connected between two adjacent arc-shaped limiting parts. Each arc-shaped limiting part partially extends out of the annular groove. It has advantages such as sensitive pressure relief response and reliable structure. However, this technology does not address the technical problem and solution of this application. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a motorcycle hydraulic tensioner positioning structure that is simple in structure, ensures that the housing and piston are reliably combined during the transportation of the motorcycle tensioner, and prevents the two from falling off, thus ensuring normal transportation.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] This utility model is a positioning structure for a motorcycle hydraulic tensioner. Inside the housing, a piston is movably mounted from the open end located at one end. The housing has an opening near the open end, and the inner wall of the housing near the open end has a recessed housing annular groove. The piston has a recessed piston annular groove on the outer ring near the open end. The positioning structure for the motorcycle hydraulic tensioner also includes a retaining ring.

[0007] When the motorcycle hydraulic tensioner is positioned, the piston is located inside the housing, the snap ring is fitted into the piston ring groove, and the snap ring is simultaneously engaged in the housing ring groove.

[0008] The snap ring includes a first bent end and a second bent end.

[0009] When the snap ring is fitted into the piston ring groove, both the first bent end and the second bent end are located at the opening on the housing.

[0010] An oil inlet is provided at the other end of the housing, and a one-way valve is provided inside the oil inlet.

[0011] The piston is equipped with a preload spring, which rests against the one-way valve.

[0012] The piston is also equipped with a plunger, and a preload spring is fitted onto the plunger, while the preload spring also abuts against the end of the plunger.

[0013] The one-way valve body is equipped with a ball and a return spring.

[0014] The working principle and beneficial effects of this utility model are as follows:

[0015] The positioning structure for a motorcycle hydraulic tensioner described in this utility model uses a housing as the basis for arranging other components of the tensioner. One end of the housing is a closed end with an oil inlet, and the other end is an open end for mounting a piston. The piston is movably fitted inside the housing from the open end. To ensure a reliable assembly of the housing and piston, the structures of both are locally modified. A recessed housing annular groove is provided on the inner wall of the housing near the open end, and a recessed piston annular groove is provided on the outer ring of the piston near the open end. The positioning structure for the motorcycle hydraulic tensioner also includes a retaining ring. In this way, when assembling the motorcycle tensioner housing and piston, the retaining ring is first fitted into the piston ring groove of the piston, and then the piston is pushed into the housing. At this time, the operator squeezes the retaining ring, which is in a contracted state. As the piston enters, the part of the retaining ring squeezed by the operator is located at the opening, which does not obstruct the entry of the retaining ring and the piston. After the piston is in place, the operator releases the squeezed part of the retaining ring, and the retaining ring opens and simultaneously engages with the housing ring groove. The retaining ring limits the relative position of the housing and the piston, completing the positioning of the motorcycle tensioner housing and piston, and preventing the piston from falling out of the housing. The part of the retaining ring squeezed by the operator is an upward-protruding structure, and the two sides of the opening limit this part. Even if the retaining ring rotates, it will only move within the width of the opening and will not rotate significantly, and the retaining ring will not fall out. In this way, even if the vehicle is bumpy during the transport of the tensioner, the positioning requirements of the motorcycle tensioner can be met, ensuring the reliability of transportation. Attached Figure Description

[0016] The following is a brief explanation of the contents depicted in the accompanying drawings and the markings therein:

[0017] Figure 1This is an axial view of the positioning structure of the motorcycle hydraulic tensioner described in this utility model.

[0018] Figure 2 This is a top view of the positioning structure of the motorcycle hydraulic tensioner described in this utility model;

[0019] Figure 3 This is a cross-sectional view of the positioning structure of the motorcycle hydraulic tensioner described in this utility model.

[0020] The labels in the attached diagram are as follows: 1. Housing; 2. Open end; 3. Piston; 4. Opening; 5. Housing ring groove; 6. Piston ring groove; 7. Snap ring; 8. First bent end; 9. Second bent end; 10. Oil inlet; 11. Check valve; 12. Preload spring; 13. Plunger; 14. End; 15. Ball bearing; 16. Return spring. Detailed Implementation

[0021] The following description, with reference to the accompanying drawings, provides a more detailed explanation of the specific embodiments of this utility model, including the shape and structure of each component, the relative positions and connections between the parts, the functions and working principles of each part:

[0022] As attached Figure 1 - Appendix Figure 3As shown, this utility model is a positioning structure for a motorcycle hydraulic tensioner. A piston 3 is movably mounted inside the housing 1 from the open end 2 located at one end. An opening 4 is provided near the open end 2 of the housing 1. A recessed housing annular groove 5 is provided on the inner wall of the housing 1 near the open end 2. A recessed piston annular groove 6 is provided on the outer ring of the piston 3 near the open end 2. The positioning structure for the motorcycle hydraulic tensioner also includes a retaining spring 7. This structure addresses the shortcomings of the prior art by proposing an improved technical solution. In this structural arrangement, the housing 1 serves as the basis for arranging other components of the tensioner. One end of the housing 1 is a closed end with an oil inlet, and the other end is an open end 2 for mounting the piston 3. The piston 3 is movably mounted inside the housing 1 from the open end 2 located at one end. To ensure reliable assembly of the housing 1 and piston 3, the structures of the housing 1 and piston 3 are locally improved. A recessed housing annular groove 5 is provided on the inner wall of the housing 1 near the open end 2, and a recessed piston annular groove 6 is provided on the outer ring of the piston 3 near the open end 2. The positioning structure for the motorcycle hydraulic tensioner also includes a retaining spring 7. In this way, when assembling the motorcycle tensioner housing 1 and piston 3, the retaining ring 7 is first fitted into the piston ring groove 6 of piston 3, and then piston 3 is pushed into housing 1. At this time, the operator squeezes the retaining ring 7, which is in a contracted state. As piston 3 enters, the part of the retaining ring squeezed by the operator is located at the opening 4, which does not obstruct the entry of the retaining ring and piston. After piston 3 is in place, the operator releases the squeezed part of the retaining ring, and retaining ring 7 opens. Retaining ring 7 is simultaneously engaged in the housing ring groove 5 of housing 1. Retaining ring 7 limits the relative position of housing 1 and piston 3, completing the positioning of housing 1 and piston 3 of the motorcycle tensioner, and piston 3 will not fall out of housing 1. The part of the retaining ring squeezed by the operator is an upward protruding structure, and the two sides of opening 4 limit this part. Even if retaining ring 7 rotates, it will only move within the width range of the opening and will not rotate significantly, and retaining ring 7 will not fall out. In this way, even if the vehicle is bumpy during transport, the positioning requirements of the motorcycle tensioner can be effectively met, ensuring transportation reliability. The motorcycle hydraulic tensioner positioning structure described in this utility model is simple in structure and ensures that the housing and piston are reliably assembled together during the transportation of the motorcycle tensioner, preventing them from falling off and ensuring normal transportation.

[0023] When the motorcycle hydraulic tensioner is positioned, the piston 3 is located inside the housing 1, and the retaining ring 7 is fitted into the piston ring groove 6. The retaining ring 7 is also engaged in the housing ring groove 5. In this structure, the retaining ring limits the axial relative position of the housing and the piston, ensuring a reliable assembly.

[0024] The retaining ring 7 includes a first bent end 8 and a second bent end 9. In the above structure, the first bent end 8 and the second bent end 9 are the retaining ring parts that the operator squeezes. On the one hand, this facilitates the positioning of the piston 3 and the housing 1 during the transport of the tensioner. On the other hand, when the tensioner needs to be used on a motorcycle, the retaining ring 7 can be easily removed, and then the piston 3 can move flexibly axially within the housing 1, so that the tensioner can play a reliable tensioning role on the motorcycle.

[0025] When the retaining ring 7 is fitted into the piston ring groove 6, both the first bent end 8 and the second bent end 9 are located at the opening 4 on the housing 1. In this structure, when the retaining ring acts as a limiting element, the opening 4 can reliably limit the positions of the first bent end 8 and the second bent end 9.

[0026] The housing 1 has an oil inlet 10 at one end, and a one-way valve 11 is installed inside the oil inlet 10. A preload spring 12 is installed inside the piston 3, and the preload spring 12 abuts against the one-way valve 11. A plunger 13 is also installed inside the piston 3, and the preload spring 12 is fitted onto the plunger 13, simultaneously abutting against the end 14 of the plunger 13. A ball bearing 15 and a return spring 16 are installed inside the one-way valve body of the one-way valve 11. In this structure, a piston 3 moves within the housing 1 cavity under random oil pressure, and a one-way valve 11 for controlling oil pressure is located near the oil inlet in the housing 1 cavity. A preload spring 12 is located between the one-way valve 11 and the piston 3, and the preload spring 12 contacts both the one-way valve 11 and the piston 3 via the plunger 13, thereby controlling the dynamic response characteristics of the timing chain system during engine operation, and achieving adjustable control of crankshaft torsional vibration and camshaft torque fluctuations.

[0027] The positioning structure for a motorcycle hydraulic tensioner described in this utility model includes a housing 1 as the foundation for arranging other components of the tensioner. One end of the housing 1 is a closed end with an oil inlet, and the other end is an open end 2 for mounting a piston 3. The piston 3 is movably fitted inside the housing 1 from the open end 2. To ensure a reliable assembly of the housing 1 and piston 3, the structures of both are locally modified. A recessed housing annular groove 5 is provided on the inner wall of the housing 1 near the open end 2, and a recessed piston annular groove 6 is provided on the outer ring of the piston 3 near the open end 2. The positioning structure for the motorcycle hydraulic tensioner also includes a retaining ring 7. In this way, when assembling the motorcycle tensioner housing 1 and piston 3, the retaining ring 7 is first fitted into the piston ring groove 6 of piston 3, and then piston 3 is pushed into housing 1. At this time, the operator squeezes the retaining ring 7, which is in a contracted state. As piston 3 enters, the part of the retaining ring squeezed by the operator is located at the opening 4, which does not obstruct the entry of the retaining ring and piston. After piston 3 is in place, the operator releases the squeezed part of the retaining ring, and retaining ring 7 opens. Retaining ring 7 is simultaneously engaged in the housing ring groove 5 of housing 1. Retaining ring 7 limits the relative position of housing 1 and piston 3, completing the positioning of housing 1 and piston 3 of the motorcycle tensioner, and piston 3 will not fall out of housing 1. The part of the retaining ring squeezed by the operator is an upward protruding structure, and the two sides of opening 4 limit this part. Even if retaining ring 7 rotates, it will only move within the width range of the opening and will not rotate significantly, and retaining ring 7 will not fall out. In this way, even if the vehicle experiences bumps or other issues during the transport of the tensioner, the positioning requirements of the motorcycle tensioner can still be effectively met, ensuring the reliability of the transport.

[0028] The present invention has been described above with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any improvements made using the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A positioning structure of a hydraulic tensioner of a motorcycle, characterized by: The piston (3) is mounted inside the housing (1) from the position of the open end (2) at one end. The housing (1) has an opening (4) near the open end (2). The inner wall of the housing (1) near the open end (2) has a recessed housing ring groove (5). The outer ring of the piston (3) near the open end (2) has a recessed piston ring groove (6). The positioning structure of the motorcycle hydraulic tensioner also includes a snap ring (7).

2. The motorcycle hydraulic tensioner positioning structure of claim 1, wherein: When the motorcycle hydraulic tensioner is positioned, the piston (3) is located inside the housing (1), the snap ring (7) is fitted inside the piston ring groove (6), and the snap ring (7) is simultaneously clamped in the housing ring groove (5).

3. The motorcycle hydraulic tensioner positioning structure according to claim 1 or 2, characterized in that: The snap ring (7) includes a first bent end (8) and a second bent end (9).

4. The motorcycle hydraulic tensioner positioning structure according to claim 3, characterized in that: When the snap ring (7) is fitted into the piston ring groove (6), the first bent end (8) and the second bent end (9) are both located at the opening (4) on the housing (1).

5. The hydraulic tensioner positioning structure for a motorcycle according to claim 1 or 2, characterized in that: An oil inlet (10) is provided at the other end of the housing (1), and a one-way valve (11) is provided inside the oil inlet (10).

6. The motorcycle hydraulic tensioner positioning structure according to claim 1 or 2, characterized in that: The piston (3) is equipped with a preload spring (12), which rests against the one-way valve (11).

7. The hydraulic motorcycle tensioner positioning structure of claim 6, wherein: The piston (3) is also provided with a plunger (13), and a preload spring (12) is fitted on the plunger (13). The preload spring (12) also abuts against the end (14) of the plunger (13).

8. The motorcycle hydraulic tensioner positioning structure of claim 6, wherein: The one-way valve (11) is provided with a ball (15) and a return spring (16) in the valve body.

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