Hollow piston rod for shock absorber

Abstract

The utility model provides a hollow piston rod for a shock absorber, and relates to the technical field of shock absorbers. The hollow piston rod for the shock absorber comprises a piston rod body and two connecting ends. According to the hollow piston rod for the shock absorber, fan-shaped groove structures are formed in the piston rod body at equal intervals, the structural strength of the piston rod body can be improved while the interior of the piston rod body is hollow, and meanwhile the locking assembly and the limiting assembly can be used for locking the piston rod body when the piston rod body is connected with the connecting end; in addition, the connecting nut is matched with the locking assembly, the interaction force between the connecting nut and the locking assembly can be achieved, the connecting nut abuts against the locking assembly and meanwhile abuts against the locking assembly, and in the using process of the equipment, due to the fact that the connecting nut abuts against the locking assembly, the equipment can be prevented from falling off. And therefore, the device cannot rotate randomly due to the overall movement of the device, the structural stability of the device is further improved, and actual application is facilitated.

Description

Technical Field

[0001] The present application relates to the technical field of shock absorbers, and in particular to a hollow piston rod for shock absorbers. Background Art

[0002] Shock absorbers are components used to suppress the shock caused by the rebound of springs after absorbing shock and the impact from the road surface. They are widely used in automobiles to accelerate the attenuation of frame and body vibrations to improve the ride smoothness of the car. The piston rod is a component inside the shock absorber. In order to reduce the manufacturing cost of the piston rod, the hollow piston rod is out of the market.

[0003] After searching, a Chinese patent discloses a hollow piston rod of an automobile shock absorber (authorization announcement number CN208535055U), which includes a piston rod as a whole, a first connecting end, a second connecting end, a first sealing gasket, a first internal thread, a second internal thread and a second sealing ring. The top of the piston rod as a whole is connected to the second connecting end, and the bottom of the piston rod as a whole is connected to the first connecting end. The axes of the piston rod as a whole, the first connecting end and the second connecting end are on the same line, and a through hole is provided inside the piston rod as a whole that passes through from top to bottom.

[0004] The interior of the piston rod is a completely hollow structure, which results in insufficient overall strength of the device. In addition, during the installation of the patented device, the piston rod is connected to the connecting ends at both ends only by threads. In the actual application of the shock absorber, the piston rod needs to move continuously. During the movement of the piston rod, the connection method that relies solely on threads is not enough to ensure the stability of the connection between the piston rod and the connecting ends at both ends. After long-term use, the ends are prone to fall off, which is not conducive to practical application.

[0005] Therefore, those skilled in the art provide a hollow piston rod for a shock absorber to solve the problems raised in the above background technology. Utility Model Content

[0006] In view of the deficiencies in the prior art, the present application provides a hollow piston rod for a shock absorber, which solves the problem mentioned in the above background technology that the connection method relying solely on threads is not sufficient to ensure the connection stability between the piston rod as a whole and the connecting ends at both ends.

[0007] To achieve the above objectives, the present application is implemented through the following technical solutions: A hollow piston rod for a shock absorber, comprising a piston rod body and two connecting ends, the outer sides of both ends of the piston rod body are threadedly connected with connecting nuts, and the connecting ends are installed on both ends of the piston rod body through the connecting nuts;

[0008] Both ends of the piston rod body are provided with limit assemblies, and the interior of the connecting end is equidistantly provided with locking assemblies, the limit assemblies are used to cooperate with the locking assemblies to hook the connecting end at both ends of the piston rod body, and the locking assemblies are used to cooperate with the connecting nut to realize the interaction force;

[0009] Sector-shaped grooves are equidistantly arranged inside the piston rod body and between the two limiting components.

[0010] Through the above technical scheme, fan-shaped groove structures are equidistantly provided inside the piston rod body, which can increase the structural strength of the piston rod body while realizing the hollowness of the interior of the piston rod body; and a locking assembly is provided inside the connecting end, which cooperates with the limit assemblies provided at both ends of the piston rod body, so that when the piston rod body and the connecting end are connected, the locking assembly and the limit assembly can be used to hook and limit them, thereby avoiding the direct detachment between the two, further increasing the connection stability between the piston rod body and the connecting end, which is beneficial to practical application; in addition, by providing a connecting nut between the piston rod body and the connecting end for secondary tightening, and using the connecting nut to cooperate with the locking assembly, the mutual force between the two can be achieved, so that the connecting nut is pressed against the locking assembly while being pressed itself, and when the device is in use, since the connecting nut is pressed, it will not rotate arbitrarily due to the overall movement of the device, thereby further increasing the structural stability of the device.

[0011] Preferably, the limiting assembly comprises a limiting groove and four limiting holes, the limiting grooves are provided on both ends of the piston rod body, the limiting groove is configured as a rectangular groove, and the four limiting holes are respectively provided on the four sides of the inner wall of the limiting groove.

[0012] Preferably, the locking assembly includes a U-shaped groove, a U-shaped locking block and two springs, the U-shaped grooves are equidistantly arranged inside the connecting end, the U-shaped locking blocks slide inside the U-shaped groove, one end of the U-shaped locking blocks extends to the outside of the connecting end, and the other end of the U-shaped locking blocks extends to the inside of the corresponding limiting holes, and the two springs are fixedly connected between one side of the U-shaped locking block and one side of the inner wall of the U-shaped groove.

[0013] Through the above technical solution, under the normal condition of the spring, the end of the U-shaped locking block located inside the limiting hole remains flush with the end of the connecting end set as a rectangular structure, and will not extend to the outside of the connecting end, thereby ensuring that the connecting end can be better installed so that the end with the rectangular structure can be better inserted into the interior of the limiting groove.

[0014] Preferably, one outer end of the connecting terminal is configured as a cylindrical structure, and the other outer end is configured as a rectangular structure, and the rectangular structure at one end of the connecting terminal extends to the interior of the limiting groove.

[0015] Through the above technical solution, by utilizing the cooperation between the rectangular structure at one end of the connecting end and the limiting groove, one end of the rectangular structure of the connecting end can be easily inserted into one end of the piston rod body.

[0016] Preferably, a bevel groove is formed on one end of the U-shaped locking block extending to the outside of the connecting end, and a bevel structure for use with the bevel groove is formed on the end of the connecting nut.

[0017] Through the above technical solution, when the connecting nut is screwed to move toward the connecting end, the cooperation between the inclined structure at the end of the connecting nut and the inclined groove can pull the U-shaped locking block to move outward inside the U-shaped groove, thereby pulling the spring and driving one end of the U-shaped locking block to extend into the interior of the limiting hole, thereby completing the locking action.

[0018] Preferably, a connecting threaded rod is installed at one end of the connecting end away from the piston rod body.

[0019] Through the above technical solution, the device can be connected to other parts of the shock absorber by using the connecting threaded rod.

[0020] Preferably, the outer side of the piston rod body and the cylindrical structure on the outer side of the connecting end are both provided with external threads for use with the connecting nut.

[0021] Through the above technical solution, the piston rod body and the connecting end are conveniently connected and fixed using a connecting nut by utilizing the cooperation between the threads.

[0022] The present application provides a hollow piston rod for a shock absorber, which has the following beneficial effects:

[0023] 1. The shock absorber uses a hollow piston rod, and by providing a fan-shaped groove structure at equal intervals inside the piston rod body, the hollow interior of the piston rod body can be achieved while increasing the structural strength of the piston rod body;

[0024] 2. The hollow piston rod for the shock absorber is provided with a locking assembly inside the connecting end, and cooperates with the limiting assemblies provided at both ends of the piston rod body. When the piston rod body and the connecting end are connected, the locking assembly and the limiting assembly are used to hook and limit them, thereby preventing the two from falling off directly, further increasing the connection stability between the piston rod body and the connecting end, which is beneficial to practical applications;

[0025] 3. The shock absorber uses a hollow piston rod, which is fastened twice by setting a connecting nut between the piston rod body and the connecting end. At the same time, the connecting nut is used in conjunction with a locking assembly to achieve the interaction force between the two, so that the connecting nut is pressed against the locking assembly while the connecting nut itself is also pressed. When the equipment is in use, since the connecting nut is pressed, it will not rotate arbitrarily due to the overall movement of the equipment, thereby further increasing the structural stability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the overall structure of this application;

[0027] Figure 2 This is a schematic diagram of the overall split structure of this application;

[0028] Figure 3 This is a schematic diagram of the internal structure of the first perspective of this application;

[0029] Figure 4 This is a schematic diagram of the internal structure of the second viewing angle of this application;

[0030] Figure 5 This is a schematic diagram of the internal structure of this application;

[0031] Figure 6 For this application Figure 3 The enlarged view of point A in the middle;

[0032] Figure 7 For this application Figure 5 Enlarged view of point B in the middle.

[0033] In the figure: 1. Piston rod body; 2. Connecting nut; 3. Connecting end; 4. Fan-shaped groove; 5. Limiting groove; 6. Limiting hole; 7. U-shaped groove; 8. U-shaped locking block; 9. Spring; 10. Bevel groove; 11. Connecting threaded rod. DETAILED DESCRIPTION

[0034] The present application is further described in detail below through drawings and examples.

[0035] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 The embodiment of the present application provides a hollow piston rod for a shock absorber, comprising a piston rod body 1 and two connecting ends 3. The outer sides of both ends of the piston rod body 1 are threadedly connected with connecting nuts 2, and the connecting ends 3 are installed on both ends of the piston rod body 1 through the connecting nuts 2. A connecting threaded rod 11 is installed at one end of the connecting end 3 away from the piston rod body 1, and the connecting threaded rod 11 can be used to connect the device with other components of the shock absorber.

[0036] Both ends of the piston rod body 1 are provided with limit assemblies, and the interior of the connecting end 3 is equidistantly provided with locking assemblies, and the limit assemblies are used to cooperate with the locking assemblies to hook the connecting end 3 at both ends of the piston rod body 1. By arranging the locking assemblies inside the connecting end 3 and cooperating with the limit assemblies arranged at both ends of the piston rod body 1, when the piston rod body 1 and the connecting end 3 are connected, the locking assemblies and the limit assemblies can be used to hook and limit them, thereby avoiding the direct detachment between the two, further increasing the connection stability between the piston rod body 1 and the connecting end 3, which is beneficial to practical application. The locking assembly is used to cooperate with the connecting nut 2 to achieve the interaction force, and by arranging the connecting nut 2 between the piston rod body 1 and the connecting end 3 for secondary tightening, and by using the connecting nut 2 to cooperate with the locking assembly, the interaction force between the two can be achieved, so that the connecting nut 2 is pressed against the locking assembly while being pressed against itself. When the device is in use, since the connecting nut 2 is pressed against, it will not rotate arbitrarily due to the movement of the entire device, thereby further increasing the structural stability of the device.

[0037] Sector-shaped grooves 4 are equidistantly provided inside the piston rod body 1 and between the two limit assemblies. By providing the sector-shaped grooves 4 equidistantly inside the piston rod body 1, the structural strength of the piston rod body 1 can be increased while achieving the hollow interior of the piston rod body 1.

[0038] Reference Figure 3 , Figure 5 , Figure 6 and Figure 7 In one aspect of the present embodiment, the limiting assembly includes a limiting groove 5 and four limiting holes 6. The limiting groove 5 is provided at both ends of the piston rod body 1. The limiting groove 5 is set as a rectangular groove, one end of the outer side of the connecting end 3 is set as a cylindrical structure, and the other end is set as a rectangular structure. The rectangular structure at one end of the connecting end 3 extends into the inside of the limiting groove 5. By using the cooperation between the rectangular structure at one end of the connecting end 3 and the limiting groove 5, one end of the rectangular structure of the connecting end 3 can be conveniently inserted into the inside of one end of the piston rod body 1. The four limiting holes 6 are respectively provided on the four sides of the inner wall of the limiting groove 5.

[0039] The cylindrical structures on the outside of the piston rod body 1 and the outside of the connecting end 3 are both provided with external threads for use with the connecting nut 2. The cooperation between the threads facilitates the use of the connecting nut 2 to connect and fix the piston rod body 1 and the connecting end 3.

[0040] Reference Figure 3 , Figure 5 , Figure 6 and Figure 7In one aspect of the present embodiment, the locking assembly includes a U-shaped groove 7, a U-shaped locking block 8 and two springs 9. The U-shaped grooves 7 are equidistantly arranged inside the connecting terminal 3, and the U-shaped locking blocks 8 slide inside the U-shaped grooves 7. One end of the U-shaped locking blocks 8 extends to the outside of the connecting terminal 3, and the other end of the U-shaped locking blocks 8 extends to the inside of the corresponding limiting holes 6. The two springs 9 are fixedly connected between one side of the U-shaped locking blocks 8 and one side of the inner wall of the U-shaped groove 7. In the normal state of the spring 9, the end of the U-shaped locking block 8 located inside the limiting hole 6 is flush with the end of the connecting terminal 3 set as a rectangular structure, and will not extend to the outside of the connecting terminal 3, thereby ensuring that the connecting terminal 3 can be better installed, so that the end with a rectangular structure can be better inserted into the inside of the limiting groove 5.

[0041] Reference Figure 2 , Figure 3 and Figure 6 In one aspect of the present embodiment, a bevel groove 10 is formed on one end of the U-shaped locking block 8 extending to the outside of the connection terminal 3, and a bevel structure used in conjunction with the bevel groove 10 is formed at the end of the connection nut 2. When the connection nut 2 is screwed to move toward the connection terminal 3, the bevel structure at the end of the connection nut 2 cooperates with the bevel groove 10 to pull the U-shaped locking block 8 to move outward inside the U-shaped groove 7, thereby pulling the spring 9 and driving one end of the U-shaped locking block 8 to extend into the inside of the limiting hole 6, thereby completing the locking action.

[0042] Working principle:

[0043] When in use, since the spring 9 is in a normal state, the end of the U-shaped locking block 8 located inside the limiting hole 6 is kept flush with the end of the connecting terminal 3 set as a rectangular structure, and will not extend to the outside of the connecting terminal 3. Therefore, when installing, first insert the end of the connecting terminal 3 with a rectangular structure into the inside of the limiting groove 5;

[0044] Then, by screwing the connecting nut 2 to move it toward the connecting end 3, the cooperation between the inclined surface structure at the end of the connecting nut 2 and the inclined surface groove 10 can pull the U-shaped locking block 8 to move outward inside the U-shaped groove 7, thereby pulling the spring 9 and driving one end of the U-shaped locking block 8 to extend into the inside of the limiting hole 6, thereby completing the locking action;

[0045] At this time, the installation between the connecting end 3 and the piston rod body 1 can be completed. The cooperation between one end of the U-shaped locking block 8 and the limiting hole 6 can be used to hook and limit the connecting end 3 and the piston rod body 1, thereby avoiding the direct falling off between the two, further increasing the connection stability between the piston rod body 1 and the connecting end 3, and by setting a connecting nut 2 between the piston rod body 1 and the connecting end 3 for secondary tightening, and at the same time using the connecting nut 2 to cooperate with the U-shaped locking block 8, under the elastic force of the spring 9, the mutual force between the two can be achieved, so that the connecting nut 2 is pressed against the U-shaped locking block 8 and itself is also pressed. When the equipment is in use, since the connecting nut 2 is pressed, it will not rotate arbitrarily due to the overall movement of the equipment, thereby further increasing the structural stability of the equipment, which is beneficial to practical applications.

[0046] Although the embodiments of the present application have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A hollow piston rod for a shock absorber, comprising a piston rod body (1) and two connecting ends (3), characterized in that: The outer sides of both ends of the piston rod body (1) are threadedly connected with connecting nuts (2), and the connecting ends (3) are mounted on both ends of the piston rod body (1) through the connecting nuts (2); Both ends of the piston rod body (1) are provided with limit assemblies, and the interior of the connecting end (3) is provided with locking assemblies at equal intervals, the limit assemblies are used to cooperate with the locking assemblies to hook the connecting end (3) on the two ends of the piston rod body (1), and the locking assemblies are used to cooperate with the connecting nut (2) to realize the interaction force; Sector-shaped grooves (4) are equidistantly provided inside the piston rod body (1) and between the two limit assemblies.

2. The hollow piston rod for shock absorber according to claim 1, characterized in that: The limiting assembly comprises a limiting groove (5) and four limiting holes (6); the limiting groove (5) is provided at both ends of the piston rod body (1); the limiting groove (5) is configured as a rectangular groove; and the four limiting holes (6) are respectively provided on the periphery of the inner wall of the limiting groove (5).

3. The hollow piston rod for shock absorber according to claim 2, characterized in that: The locking assembly comprises a U-shaped groove (7), a U-shaped locking block (8) and two springs (9); the U-shaped groove (7) is equidistantly arranged inside the connecting end (3); the U-shaped locking block (8) slides inside the U-shaped groove (7); one end of the U-shaped locking block (8) extends to the outside of the connecting end (3); the other end of the U-shaped locking block (8) extends to the inside of the corresponding limiting hole (6); and the two springs (9) are fixedly connected between one side of the U-shaped locking block (8) and one side of the inner wall of the U-shaped groove (7).

4. The hollow piston rod for shock absorber according to claim 2, characterized in that: One end of the outer side of the connecting terminal (3) is configured as a cylindrical structure, and the other end is configured as a rectangular structure, and the rectangular structure at one end of the connecting terminal (3) extends into the interior of the limiting groove (5).

5. The hollow piston rod for shock absorber according to claim 3, characterized in that: An inclined groove (10) is formed on one end of the U-shaped locking block (8) extending to the outside of the connecting end (3), and an inclined structure for use with the inclined groove (10) is formed on the end of each of the connecting nuts (2).

6. The hollow piston rod for a shock absorber according to claim 1, characterized in that: A connecting threaded rod (11) is installed at one end of the connecting end (3) away from the piston rod body (1).

7. The hollow piston rod for a shock absorber according to claim 4, characterized in that: The cylindrical structures on the outside of the piston rod body (1) and the outside of the connecting end (3) are both provided with external threads for use with the connecting nut (2).

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