Shock absorber piston rod used for being connected with hanging ring

Abstract

The utility model discloses a shock absorber piston rod used for being connected with a hanging ring, and relates to the field of shock absorbers, the shock absorber piston rod comprises a shaft rod, one end of the shaft rod is connected with a piston connecting part, and the piston connecting part is used for being fixedly connected with a piston; a lifting ring connecting hole is formed in the end, away from the piston connecting part, of the shaft rod, the lifting ring connecting hole is a blind hole, internal threads used for being matched with a lifting ring are arranged in the lifting ring connecting hole, and an opening of the lifting ring connecting hole penetrates through the end face, away from the piston connecting part, of the shaft rod. The bottom wall of the hanging ring connecting hole is sunken in the direction away from an opening of the hanging ring connecting hole. The utility model has the advantages of simple and reliable connection between the damper piston rod and the hanging ring, good applicability of the piston shaft and the like.

Description

Technical Field

[0001] The utility model relates to the field of shock absorbers, and particularly relates to a shock absorber piston rod for connecting a suspension ring. Background Art

[0002] An automobile shock absorber is a component for shock absorption in an automobile, which includes a cylinder block and a piston rod. The piston rod is connected to a piston, and the piston slides in the cylinder block in a sealed manner, applying the pressure during vibration to hydraulic oil. By the relative movement of the piston rod with respect to the cylinder block of the hydraulic cylinder, the shock absorption and buffering of the automobile are achieved.

[0003] In the related art, one end of the piston rod of the shock absorber extending out of the cylinder block is usually fixedly connected to a suspension ring, and the piston rod of the shock absorber is connected to the automobile through the suspension ring. When the automobile vibrates during operation, the vibration of the automobile pushes the piston rod to expand and contract through the suspension ring, so as to change the inner cavity of the shock absorber and achieve shock absorption.

[0004] In the above-mentioned prior art, both ends of the piston rod need to be connected to a suspension ring and a piston. The suspension ring is fixed to the piston rod by welding, and it is inconvenient to position the suspension ring. If the positioning of the suspension ring is deviated, the welded suspension ring and piston rod cannot be used, resulting in waste, and each piston rod can only be welded with one type of suspension ring and cannot be applicable to other suspension rings. Summary of the Invention

[0005] To solve the defect of inconvenient connection between the piston rod and the suspension ring in the prior art, the utility model provides a shock absorber piston rod for connecting a suspension ring, which facilitates the fixed connection between the suspension ring and the piston rod and has better applicability.

[0006] The above technical purpose of the utility model is achieved through the following technical solutions:

[0007] The utility model provides a shock absorber piston rod for connecting a suspension ring. The shock absorber piston rod includes a shaft rod, and one end of the shaft rod is connected with a piston connecting part for fixedly connecting a piston; a suspension ring connection hole is formed at one end of the shaft rod far away from the piston connecting part. The suspension ring connection hole is a blind hole, and an internal thread for cooperating with the suspension ring is arranged in the suspension ring connection hole. The opening of the suspension ring connection hole penetrates through the end face of the shaft rod far away from the piston connecting part, and the bottom wall of the suspension ring connection hole is recessed in the direction away from the opening of the suspension ring connection hole.

[0008] Further, a guiding port is arranged at the opening of the suspension ring connection hole. Along the direction away from the suspension ring connection hole, the guiding port is in a flared shape with a gradually increasing diameter.

[0009] Further, the flare angle of the guiding port is 30° - 50°.

[0010] Further, one end of the sling connection hole away from the opening of the sling connection hole forms a hemispherical cavity, and the bottom wall of the sling connection hole is the spherical inner wall of the hemispherical cavity.

[0011] Further, the piston connection part is cylindrical, and the piston connection part is coaxially connected to the end of the shaft rod away from the sling connection hole.

[0012] Further, the diameter of the piston connection part is smaller than the diameter of the shaft rod, and a limiting step is formed at the connection between the piston connection part and the shaft rod.

[0013] Further, an external thread is provided on the outer periphery of the piston connection part, and the external thread is used to cooperate with the piston.

[0014] Further, the external thread is provided on the outer periphery of the end of the piston connection part away from the shaft rod.

[0015] Further, the distance between the external thread and the shaft rod is 35 - 80 mm.

[0016] Further, a chamfer is provided on the outer edge of the end of the piston connection part away from the shaft rod.

[0017] In summary, the present utility model has the following beneficial effects:

[0018] 1. In the shock absorber piston rod of the present utility model, one end of the shaft rod is connected to the piston connection part, and the piston is connected through the piston connection part; the other end of the shaft rod is provided with a sling connection hole, and the sling can cooperate with the sling connection hole. A columnar structure adapted to the sling connection hole can be provided on the sling, so as to facilitate the positioning of the sling and the piston rod. An internal thread is provided in the sling connection hole, and the sling and the piston rod can be fixed by screwing the internal thread and the thread on the sling. There will be no situation where the piston rod is wasted due to welding after the positioning deviation between the piston rod and the sling, and a columnar structure with a thread fit with the sling connection hole can be provided on different slings, and different slings can be selected to cooperate with the piston rod according to needs, and the applicability of the piston rod is better. The bottom wall of the sling connection hole is recessed in the direction away from its opening, so that when the sling cooperates with the sling connection hole, it is not easy to squeeze the bottom wall of the sling connection hole, avoiding damage to the sling and the sling connection hole.

[0019] 2. A flared guiding port is provided at the opening of the sling connection hole to facilitate the part on the sling to be screwed into the sling connection hole from the guiding port.

[0020] 3. The bottom wall of the sling connection hole is a hemispherical inner wall, which is convenient for the formation of the sling connection hole, and at the same time avoids stress concentration during hole opening and reduces damage during hole opening.

[0021] 4. The piston connecting part is cylindrical, and an external thread is provided thereon for cooperation with the piston, making the connection between the piston rod and the piston convenient and reliable.

[0022] 5. The diameter of the piston connecting part is smaller than that of the shaft rod, so that a limiting step is formed at the connection between the piston connecting part and the shaft rod, and one side of the piston facing the shaft rod is limited by the limiting step, which is convenient for the positioning and cooperation between the piston and the piston rod, and makes the connection between the piston and the piston rod more firm and reliable. Brief Description of the Drawings

[0023] Figure 1 is a three-dimensional structural schematic diagram of a shock absorber piston rod according to an embodiment of the present invention.

[0024] Figure 2 is a front view structural schematic diagram of a shock absorber piston rod according to an embodiment of the present invention.

[0025] Figure 3 is Figure 2 a sectional structural schematic diagram at A-A in

[0026] Figure 4 is Figure 3 an enlarged schematic diagram at B in

[0027] Figure 5 is Figure 3 an enlarged schematic diagram at C in

[0028] In the figure:

[0029] 1000, shock absorber piston rod; 100, shaft rod; 110, hanger connection hole; 120, internal thread; 130, spherical inner wall; 140, guiding port; 200, piston connecting part; 210, external thread; 220, chamfer; 300, limiting step. Detailed Embodiment

[0030] The present invention will be further described below with reference to the accompanying drawings.

[0031] This embodiment discloses a shock absorber piston rod 1000 for connecting a hanger. Referring to Figure 1 , the shock absorber piston rod 1000 includes a shaft rod 100. The shaft rod 100 is a cylindrical rod with a constant diameter. One end of the shaft rod 100 is used to extend into the cylinder body of the shock absorber and is fixedly connected to the piston, and the other end of the shaft rod 100 is used to extend out of the cylinder body of the shock absorber and is fixedly connected to the hanger.

[0032] Referring to Figure 1 and Figure 2 , a piston connecting part 200 is connected to one end of the shaft rod 100, and the piston connecting part 200 is used to fixedly connect the piston. In this embodiment, the piston connecting part 200 and the shaft rod 100 are integrally cast to increase the connection strength between the piston connecting part 200 and the shaft rod 100.

[0033] In this embodiment, the piston connecting portion 200 is cylindrical, and the piston connecting portion 200 is coaxially connected to the end face of the shaft rod 100 away from the sling connection hole 110, so as to ensure the coaxiality when the shock absorber piston rod 1000 and the piston are connected. Among them, the diameter of the piston connecting portion 200 is smaller than the diameter of the shaft rod 100. Therefore, a limiting step 300 is formed at the connection between the piston connecting portion 200 and the shaft rod 100, so that one side of the piston facing the shaft rod 100 is limited by the limiting step 300, which is convenient for the positioning and cooperation between the piston and the shock absorber piston rod 1000, and makes the connection between the piston and the shock absorber piston rod 1000 firmer and more reliable.

[0034] Refer to Figure 3 and Figure 4 , an external thread 210 is provided on the outer periphery of the piston connecting portion 200. Therefore, the external thread 210 can be used for thread fitting with the piston. When the piston connecting portion 200 is connected to the piston, the external thread 210 on the piston connecting portion 200 is screwed into the threaded hole of the piston, making the connection between the shock absorber piston rod 1000 and the piston convenient and reliable.

[0035] In this embodiment, the external thread 210 is only provided on the outer periphery of one end of the piston connecting portion 200 away from the shaft rod 100, so that the piston can fit tightly with the part of the piston connecting portion 200 without the external thread 210, so as to enhance the sealing effect.

[0036] Specifically in this embodiment, the distance between the external thread 210 and the shaft rod 100 is 35 - 80 mm, that is, the length of the part of the threaded connection portion without the external thread 210 is 35 - 80 mm. In addition, in other embodiments, this distance can also be other appropriate values to adapt to the thickness of the piston.

[0037] In this embodiment, a chamfer 220 is provided on the outer edge of one end of the piston connecting portion 200 away from the shaft rod 100. The chamfer 220 is provided on the side of the external thread 210 away from the shaft rod 100 to play a guiding role when the external thread 210 is screwed into the threaded hole of the piston, and facilitate the cooperation between the piston connecting portion 200 and the piston.

[0038] Refer to Figure 3 and Figure 5 , a sling connection hole 110 is provided at one end of the shaft rod 100 away from the piston connecting portion 200. The sling can cooperate with the sling connection hole 110. A columnar structure adapted to the sling connection hole 110 can be provided on the sling to cooperate with the sling connection hole 110 for connection, so as to facilitate the positioning of the sling and the shock absorber piston rod 1000. Specifically, the sling connection hole 110 is a blind hole, which only has an opening. The opening of the sling connection hole 110 penetrates the end face of the shaft rod 100 away from the piston connecting portion 200 for a part on the sling to be inserted into the sling connection hole 110 from the opening.

[0039] The hanging ring connection hole 110 is provided with an internal thread 120 for cooperating with the hanging ring. Through the cooperation of the internal thread 120 and the thread on the hanging ring, the hanging ring and the shock absorber piston rod 1000 can be fixed by means of threaded connection, and the situation of waste of the shock absorber piston rod 1000 caused by welding after the positioning deviation between the shock absorber piston rod 1000 and the hanging ring will not occur. Moreover, a columnar structure that is in threaded cooperation with the hanging ring connection hole 110 can be provided on different hanging rings, and different hanging rings can be selected to cooperate with the shock absorber piston rod 1000 according to needs, so that the applicability of the shock absorber piston rod 1000 is better.

[0040] In this embodiment, the bottom wall of the hanging ring connection hole 110 is recessed in the direction away from the opening of the hanging ring connection hole 110, so that when the hanging ring is fitted with the hanging ring connection hole 110, the bottom wall of the hanging ring connection hole 110 is not easily squeezed, avoiding damage to the hanging ring and the hanging ring connection hole 110.

[0041] Specifically, one end of the hanging ring connection hole 110 away from the opening of the hanging ring connection hole 110 forms a hemispherical cavity, and the hemispherical cavity is arranged facing the opening of the hanging ring connection hole 110. The bottom wall of the hanging ring connection hole 110 is the spherical inner wall 130 of the hemispherical cavity, which facilitates the formation of the hanging ring connection hole 110 and at the same time avoids stress concentration during hole opening and reduces damage during hole opening.

[0042] A guiding port 140 is provided at the opening of the hanging ring connection hole 110. Along the direction away from the hanging ring connection hole 110, the guiding port 140 is in the shape of a flared opening with a gradually increasing diameter, so that the part on the hanging ring can be screwed into the hanging ring connection hole 110 from the guiding port 140.

[0043] In this embodiment, the flare angle of the guiding port 140 is 30° - 50°. Through experiments, the hanging ring can enter the hanging ring connection hole 110 more smoothly at this angle.

[0044] The above is only the preferred embodiment of the present invention. Therefore, all equivalent changes or modifications made according to the structure, features and principles described in the scope of the patent application of the present invention are included in the scope of the patent application of the present invention.

Claims

1. A shock absorber piston rod for connecting a sling, characterized in that, The shock absorber piston rod (1000) includes a shaft rod (100). One end of the shaft rod (100) is connected with a piston connecting part (200), and the piston connecting part (200) is used for fixedly connecting a piston. At the end of the shaft rod (100) far from the piston connecting part (200), a ring connection hole (110) is formed. The ring connection hole (110) is a blind hole. An internal thread (120) for cooperating with a ring is arranged in the ring connection hole (110). The opening of the ring connection hole (110) penetrates through the end face of the shaft rod (100) far from the piston connecting part (200), and the bottom wall of the ring connection hole (110) is recessed in the direction away from the opening of the ring connection hole (110).

2. The shock absorber piston rod for connecting a lifting ring according to claim 1, wherein, A guiding port (140) is arranged at the opening of the ring connection hole (110). Along the direction away from the ring connection hole (110), the guiding port (140) is in a flared shape with a gradually increasing diameter.

3. The shock absorber piston rod for connecting a sling as claimed in claim 2, wherein, The flare angle of the guiding port (140) is 30° - 50°.

4. The shock absorber piston rod for connecting a sling according to claim 1, characterized in that, One end of the ring connection hole (110) far from the opening of the ring connection hole (110) forms a hemispherical cavity, and the bottom wall of the ring connection hole (110) is the spherical inner wall (130) of the hemispherical cavity.

5. The shock absorber piston rod for connecting a lifting ring according to claim 1, characterized in that, The piston connecting part (200) is cylindrical and is coaxially connected to the end of the shaft rod (100) far from the ring connection hole (110).

6. The shock absorber piston rod for connecting a sling according to claim 5, wherein The diameter of the piston connecting part (200) is smaller than the diameter of the shaft rod (100), and a limiting step (300) is formed at the connection between the piston connecting part (200) and the shaft rod (100).

7. The shock absorber piston rod for connecting a lifting ring according to claim 6, characterized in that, External threads (210) are arranged on the outer circumference of the piston connecting part (200), and the external threads (210) are used for cooperating with the piston.

8. The shock absorber piston rod for connecting a lifting ring according to claim 7, characterized in that, The external threads (210) are arranged on the outer circumference of the end of the piston connecting part (200) far from the shaft rod (100).

9. The shock absorber piston rod for connecting a sling as claimed in claim 8, wherein, The distance between the external threads (210) and the shaft rod (100) is 35 - 80 mm.

10. A shock absorber piston rod for connecting a sling, as claimed in claim 6, wherein, A chamfer (220) is arranged on the outer edge of the end of the piston connecting part (200) far from the shaft rod (100).

Images