Sealing structure for starter isolator

Abstract

The utility model relates to the field of starter isolators, in particular to a sealing structure for a starter isolator, which comprises a transmission shaft provided with a stepped section structure. The guide cylinder is in threaded connection with the isolator main body; the rubber mat A is arranged between the isolator main body and the guide cylinder; and the rubber mat B is arranged between a sudden change section between the end part A and the end part B of the transmission shaft and the guide cylinder. The rubber mat A and the rubber mat B are arranged to seal the space between the guide cylinder and the isolator body and seal the gap between the sudden change section between the end A and the end B of the transmission shaft and the guide cylinder respectively, and the sealing effect of the isolator is improved; and moreover, the rubber mat A and the rubber mat B are independently arranged, so that the rubber mat A and the rubber mat B can be independently deformed, the normal sealing function of the other side can be prevented from being influenced by deformation of one side, and the possibility of accidental sealing leakage of the sealing device is reduced.

Description

Technical Field

[0001] The utility model relates to the field of starter isolators, in particular to a sealing structure for starter isolators. Background Art

[0002] The starter non-return device is installed on the starter to prevent the engine from reversely reacting and damaging the starter under special circumstances, thereby protecting the starter. When the non-return device is in operation, the gear on the transmission shaft of the non-return device meshes with the flywheel of the engine to transmit the rotational torque of the starter to the engine, causing the engine to start rotating.

[0003] When the transmission shaft of the one-way device is installed on the one-way device, the transmission shaft is installed on the one-way device through a guide cylinder threadedly connected to the one-way device, and a gasket is generally used to seal the transmission shaft and the one-way device to prevent foreign matter from entering between the one-way device and the transmission shaft and affecting the normal use of the one-way device; however, the current setting characteristics of the gasket are basically designed based on the contact surface of the guide cylinder, that is, only the part of the one-way device that is flush with the guide cylinder can be sealed, and the remaining part, especially the transition arc surface of the transmission shaft cannot be acted upon by the gasket, resulting in the gasket The sealing effect between the transmission shaft and the guide frame is not complete, that is, the effect of using the gasket to seal the transmission shaft and the one-way device is poor. Utility Model Content

[0004] The utility model provides a sealing structure for a starter isolator that can improve the sealing effect, aiming to solve the technical problems in the above-mentioned background technology. The technical solution is as follows:

[0005] The transmission shaft comprises a stepped cross-sectional structure, so that the diameter of the A end of the transmission shaft is larger than the diameter of the B end thereof, and the diameter of the transmission shaft changes suddenly at the connection between the A end and the B end, and the B end of the transmission shaft is the main end connected to the gear;

[0006] A one-way device body, wherein the outer side wall of the one-way device body is provided with threads;

[0007] The guide cylinder has a thread on its inner wall, and the thread of the one-way device body matches the thread of the guide cylinder, so that the guide cylinder is threadedly connected to the one-way device body. The top surface of the guide cylinder is provided with a hole for the transmission shaft to pass through, and the diameter of the hole is equal to the diameter of the end of the transmission shaft B;

[0008] Rubber pad A, which is arranged between the isolator body and the guide cylinder;

[0009] The rubber pad B is arranged between the sudden change section between the A end and the B end of the transmission shaft and the guide cylinder.

[0010] Optionally, it also includes: a protective sleeve, one side of the protective sleeve is provided with an open end, the open end of the protective sleeve passes through the connecting part between the transmission shaft, the guide cylinder and the isolator body, and the protective sleeve cover is arranged outside the connecting part.

[0011] Optionally, it also includes: a snap-back ring, and the open end of the protective sleeve is provided with a snap-back ring, so that the protective sleeve closes the connecting part.

[0012] Optionally, an exhaust hole is provided on the top of the protective cover.

[0013] Optionally, it further includes: a friction ring, and the friction ring is fixedly connected to the outer wall of the protective sleeve.

[0014] Optionally, it also includes: a pull ring, and the top of the protective cover is fixedly connected with the pull ring.

[0015] Optionally, it further includes: an anti-skid pad, and the anti-skid pad is fixedly connected to the outer wall of the guide cylinder.

[0016] Optionally, the protective cover is made of rubber.

[0017] The beneficial effects are as follows:

[0018] 1. The utility model provides rubber pads A and rubber pads B to respectively seal between the guide cylinder and the isolator body, and to seal the gap between the sudden change section between the A end and the B end of the transmission shaft and the guide cylinder, thereby improving the sealing effect of the utility model; and the rubber pads A and B are independently provided, which will enable them to deform independently, thereby preventing the deformation of one from affecting the normal sealing function of the other, and reducing the possibility of accidental leakage of the utility model.

[0019] 2. The utility model protects the one-way device body and the transmission shaft by providing a protective cover, so that the one-way device body and the transmission shaft can be stored for a long time without being easily contaminated by dust and impurities, and is suitable for the storage of replacement parts of the one-way device body and the transmission shaft; the rebate ring can make the open end of the protective cover close to the one-way device body and close the open end of the protective cover, thereby better sealing the internal environment of the protective cover and improving the protective effect of the protective cover; when the protective cover is installed, the exhaust hole is provided to discharge the gas generated in the protective cover, so that the protective cover can better protect the one-way device body and the transmission shaft, and improve the protective effect of the protective cover; the friction ring is used to increase the friction coefficient of the outer surface of the protective cover, which is convenient for the user to install the protective cover on the one-way device body and the transmission shaft for convenient use; the use of the pull ring can provide the user with a better force application point, which is convenient for removing the protective cover.

[0020] 3. The utility model increases the friction coefficient of the outer surface of the guide cylinder by arranging the anti-skid pad, so that the user can tighten the guide cylinder with the isolator body to improve the fixing effect of the transmission shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0022] Figure 2 It is a cross-sectional view of the internal structure of the utility model.

[0023] Figure 3 It is a structural schematic diagram of the guide cylinder, transmission shaft and rubber pad A of the utility model.

[0024] Figure 4 It is a schematic diagram of the structure of the protective cover, the rebate ring and the exhaust hole of the utility model.

[0025] The markings in the attached drawings are: 1-transmission shaft, 101-isolator body, 2-guide cylinder, 3-rubber pad A, 4-rubber pad B, 5-protective sleeve, 6-rebate ring mouth, 7-exhaust hole, 8-friction ring, 9-pull ring, 10-anti-slip pad. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] Embodiment: A sealing structure for a starter isolator, see Figure 1-Figure 4 , including: a transmission shaft 1, the transmission shaft 1 is provided with a stepped cross-sectional structure, so that the diameter of the A end of the transmission shaft 1 is larger than the diameter of the B end thereof, and at the connection between the A end and the B end, the diameter of the transmission shaft 1 changes suddenly, and the B end of the transmission shaft 1 is the main end connected to the gear; a one-way device body 101, the outer wall of the one-way device body 101 is provided with a thread; a guide cylinder 2, the inner wall of the guide cylinder 2 is provided with a thread, the thread of the one-way device body 101 cooperates with the thread of the guide cylinder 2, so that the guide cylinder 2 is threadedly connected to the one-way device body 101, and the top surface of the guide cylinder 2 is provided with a hole for the transmission shaft 1 to pass through, the diameter of the hole is equal to the diameter of the B end of the transmission shaft 1, and the guide cylinder 2 is used to fix the transmission shaft 1 on the one-way device body 101; a rubber pad A3, the rubber pad A3 is arranged between the one-way device body 101 and the guide cylinder 2; a rubber pad B4, the rubber pad B4 is arranged between the sudden change section between the A end and the B end of the transmission shaft 1 and the guide cylinder 2.

[0028] The B end of the transmission shaft 1 is passed through the hole on the guide cylinder 2, the A end of the transmission shaft 1 is located on the left side of the guide cylinder 2, and the B end of the transmission shaft 1 is located on the right side of the guide cylinder 2. The guide cylinder 2 is rotated and the guide cylinder 2 is threadedly fixed on the right side of the isolator body 101, so that the transmission shaft 1 can be fixed on the isolator body 101; after the guide cylinder 2 is fixed on the isolator body 101, the rubber pad A3 is squeezed and deformed, so the restoring effect of the rubber pad A3 can fully fill the gap between the guide cylinder 2 and the isolator body 101. Similarly, the rubber pad B4 fully fills the gap between the A end of the transmission shaft 1 The gap between the sudden change section between the A end and the B end and the guide cylinder 2 is blocked by the rubber pad A3 and the rubber pad B4. Therefore, the cooperation between the rubber pad A3 and the rubber pad B4 can fully block the gap between the transmission shaft 1 and the one-way device body 101, and prevent debris from entering the one-way device body 101 and causing the entire one-way device to get stuck or fail to work. The rubber pad A3 and the rubber pad B4 are independently arranged, which will enable them to deform independently. Because the rubber pad A3 and the rubber pad B4 close the gap in different situations, the rubber pad A3 and the rubber pad B4 are independently arranged to prevent the deformation of one from affecting the normal sealing function of the other.

[0029] See also Figure 1 , Figure 2 and Figure 4 , and also includes: a protective sleeve 5, an open end is provided on one side of the protective sleeve 5, the open end of the protective sleeve 5 passes through the connecting part between the transmission shaft 1, the guide cylinder 2 and the isolator body 101, so that the protective sleeve 5 is covered outside the connecting part, the protective sleeve 5 is made of rubber material, and an exhaust hole 7 is opened on the top of the protective sleeve 5; a rebate ring opening 6, a rebate ring opening 6 is provided on the open end of the protective sleeve 5, so that the protective sleeve 5 closes the connecting part; a friction ring 8, a friction ring 8 is fixedly connected to the outer side wall of the protective sleeve 5; a pull ring 9, a pull ring 9 is fixedly connected to the top of the sleeve.

[0030] The use of the protective cover 5 can protect the one-way device body 101 and the transmission shaft 1, so that they can be stored for a long time without being easily contaminated by dust and impurities, and is suitable for the storage of replacements for the one-way device body 101 and the transmission shaft 1; the rebate ring 6 can make the open end of the protective cover 5 fit tightly against the one-way device body 101, close the open end of the protective cover 5, thereby better sealing the internal environment of the protective cover 5 and improving the protective effect of the protective cover 5; when the protective cover 5 is installed, the exhaust hole 7 is set to discharge the gas generated in the protective cover 5, so that the protective cover 5 can protect the one-way device body 101 and the transmission shaft 1 more snugly, and improve the protective effect of the protective cover 5; the friction ring 8 is used to increase the friction coefficient of the outer surface of the protective cover 5, so that the user can install the protective cover 5 on the outside of the one-way device body 101 and the transmission shaft 1 for convenient use; the use of the pull ring 9 can provide the user with a better force point, which is convenient for removing the protective cover 5.

[0031] See also Figure 2, further comprising: an anti-skid pad 10, the outer wall of the guide cylinder 2 is fixedly connected with the anti-skid pad 10. The anti-skid pad 10 is used to increase the friction coefficient of the outer surface of the guide cylinder 2, so that the user can better tighten the guide cylinder 2 with the isolator body 101, thereby improving the fixing effect of the guide cylinder 2 on the transmission shaft 1.

[0032] The above-mentioned embodiments only express the preferred implementation of the utility model, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that for ordinary technicians in this field, several modifications, improvements and substitutions can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A sealing structure for a starter isolator, characterized in that: include: The transmission shaft (1) is provided with a stepped cross-sectional structure, so that the diameter of the A end of the transmission shaft (1) is larger than the diameter of the B end thereof, and the diameter of the transmission shaft (1) changes suddenly at the connection between the A end and the B end, and the B end of the transmission shaft (1) is the main end connected to the gear; A isolator body (101), wherein the outer side wall of the isolator body (101) is provided with threads; A guide cylinder (2), wherein the inner wall of the guide cylinder (2) is provided with a thread, the thread of the isolator body (101) cooperates with the thread of the guide cylinder (2), so that the guide cylinder (2) is threadedly connected to the isolator body (101), and a hole is provided on the top surface of the guide cylinder (2) for the transmission shaft (1) to pass through, and the diameter of the hole is equal to the diameter of the end B of the transmission shaft (1), and the guide cylinder (2) is used to fix the transmission shaft (1) to the isolator body (101); A rubber pad A (3) is arranged between the isolator body (101) and the guide cylinder (2); and a rubber pad B (4) is arranged between the sudden change section between the A end and the B end of the transmission shaft (1) and the guide cylinder (2).

2. A sealing structure for a starter isolator according to claim 1, characterized in that: Also includes: A protective sleeve (5) is provided with an open end on one side of the protective sleeve (5), and the open end of the protective sleeve (5) passes through the connecting portion between the transmission shaft (1), the guide cylinder (2) and the isolator body (101), so that the protective sleeve (5) is covered outside the connecting portion.

3. A sealing structure for a starter isolator according to claim 2, characterized in that: It also comprises a snap-back ring (6), the open end of the protective sleeve (5) is provided with a snap-back ring (6), so that the protective sleeve (5) closes the connecting part.

4. A sealing structure for a starter isolator according to claim 3, characterized in that: An exhaust hole (7) is provided on the top of the protective cover (5).

5. A sealing structure for a starter isolator according to claim 4, characterized in that: It also comprises a friction ring (8), and the friction ring (8) is fixedly connected to the outer wall of the protective sleeve (5).

6. A sealing structure for a starter isolator according to claim 5, characterized in that: Also includes: A pull ring (9) is fixedly connected to the top of the protective sleeve (5).

7. A sealing structure for a starter isolator according to claim 6, characterized in that: It also includes an anti-skid pad (10), and the anti-skid pad (10) is fixedly connected to the outer side wall of the guide cylinder (2).

8. The sealing structure for a starter isolator according to claim 7, characterized in that: The protective cover (5) is made of rubber material.

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