Novel connecting fork structure

Abstract

The utility model relates to the technical field of shock absorbers, in particular to a novel connecting fork structure which is characterized in that an end cover is fixedly mounted at the lower end of a shock absorber barrel, a connecting fork is integrally formed at the bottom of the end cover, a locking ring is welded at the upper end of the end cover, and the locking ring is in threaded connection with the outer wall of the lower end of the shock absorber barrel; a floating piston is arranged in the shock absorber cylinder, a gas chamber located below the floating piston is arranged in the shock absorber cylinder, and an inflation structure communicated with the gas chamber is arranged on the end cover. When the shock absorber breaks down, the end cover can be conveniently detached from the lower end of the shock absorber cylinder for maintenance.

Description

Technical Field

[0001] The utility model relates to the technical field of shock absorbers, in particular to a novel connecting fork structure. Background Art

[0002] With the rapid development of the automobile industry, shock absorbers, as one of the important components of automobiles, largely determine the ride comfort of automobiles. Shock absorbers used in automobiles usually include double-acting cylinder shock absorbers and single-tube pneumatic shock absorbers. As a new type of shock absorber, the single-tube pneumatic shock absorber uses a floating piston, does not require an additional cylinder, and reduces a valve system, which greatly simplifies the structure compared to the double-acting cylinder shock absorber.

[0003] In the prior art, a utility model patent with application number CN202221981025.0 discloses a lower connecting fork structure of an automobile shock absorber, including a shock absorber outer cylinder, a bottom cover is provided at one end of the shock absorber outer cylinder, an integral stamped fork foot is provided on one side of the bottom cover, the integral stamped fork foot includes a contoured bottom cover, a structural frame, and a yoke, and the shock absorber outer cylinder, the bottom cover and the contoured bottom cover are connected by an annular weld.

[0004] The outer cylinder, bottom cover and contoured bottom cover of the lower connecting fork-shaped structure of the above-mentioned automobile shock absorber are connected by an annular weld, and it is inconvenient to remove the bottom cover for internal maintenance when the shock absorber fails. In addition, the bottom cover of the lower connecting fork-shaped structure of the above-mentioned automobile shock absorber does not have an inflatable structure, and cannot be applied to a single-tube inflatable shock absorber. Utility Model Content

[0005] The purpose of the utility model is to provide a new type of connecting fork structure, the bottom cover of which is detachable and can have both connecting fork and inflation functions, so as to solve the defects mentioned in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A new type of connecting fork structure includes a shock absorber cylinder, an end cover is fixedly installed at the lower end of the shock absorber cylinder, a connecting fork is integrally formed at the bottom of the end cover, a circular groove matching the lower end of the shock absorber cylinder is provided on the top of the end cover, a locking ring is welded to the upper end of the end cover, and the locking ring is threadedly connected to the outer wall of the lower end of the shock absorber cylinder; a floating piston is provided in the shock absorber cylinder, a gas chamber is provided in the shock absorber cylinder below the floating piston, and an inflation structure connected to the gas chamber is provided on the end cover.

[0008] As a preferred technical solution, an O-ring is provided on the inner wall of the circular groove.

[0009] As a preferred technical solution, the inflation structure includes a mounting groove arranged on the bottom wall of the circular groove, a rubber air plug is embedded in the mounting groove, and a pin hole for inserting an inflation needle into the rubber air plug is provided at the bottom of the end cover.

[0010] As a preferred technical solution, the inflation structure includes a columnar protrusion arranged on the bottom wall of the circular groove, the bottom of the end cover is provided with a vertically extending first inflation channel, the top of the columnar protrusion is provided with a vertically extending second inflation channel, and the columnar protrusion is provided with an inflation hole connecting the first inflation channel and the lower end of the second inflation channel; the second inflation channel is provided with a blocking ball for blocking the upper end of the inflation hole, and a blocking bolt is fixedly installed in the upper end of the second inflation channel, and a spring is connected between the blocking bolt and the blocking ball; the outer wall of the columnar protrusion is provided with an air inlet hole connecting the second inflation channel.

[0011] As a preferred technical solution, a movable column is fixedly installed at the bottom of the blocking ball, and the movable column is vertically slidably installed in the inflation hole. The lower end of the movable column extends into the first inflation channel and is fixedly installed with a limit plate; an adjusting screw is threadedly connected in the first inflation channel below the limit plate, and the adjusting screw moves vertically along the first inflation channel when it is rotated, and a hook body for hooking the limit plate is fixedly installed on the upper end of the adjusting screw.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. A locking ring is provided at the upper end of the end cover, which is threadedly connected to the outer wall of the lower end of the shock absorber cylinder. When the shock absorber fails, it is convenient to remove the end cover from the lower end of the shock absorber cylinder for maintenance;

[0014] 2. A connecting fork is integrally formed at the bottom of the end cover, and an inflatable structure communicating with the gas chamber is provided on the end cover, so as to facilitate the connection of the monotube inflatable shock absorber to the vehicle body suspension;

[0015] 3. A protruding elastic retaining ring is arranged around the outer circumference of the rubber gas plug, and the elastic retaining ring is embedded in the embedded groove of the inner wall of the installation groove, so that the damaged rubber gas plug can be removed and replaced conveniently;

[0016] 4. A hook body for hooking the limit plate is fixedly installed on the upper end of the adjusting screw. After the inflation is completed, the adjusting screw is rotated clockwise to drive the hook body to move downward. The hook body pulls the limit plate downward, so that the blocking ball is tightly attached to the bottom of the second inflation channel and cannot move upward, further improving the sealing of the inflation structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 It is a structural schematic diagram of the first embodiment of the utility model;

[0019] Figure 2 yes Figure 1 A cross-sectional schematic diagram of

[0020] Figure 3 yes Figure 2 A partial enlarged view of part I;

[0021] Figure 4 It is a structural schematic diagram of the end cover of the second embodiment of the utility model;

[0022] Figure 5 It is a structural schematic diagram of the inflatable structure of the second embodiment of the utility model;

[0023] Figure 6 It is a top view schematic diagram of the movable column of the second embodiment of the utility model;

[0024] Figure 7 It is a bottom view schematic diagram of the adjusting screw of the second embodiment of the utility model.

[0025] In the figure: 1- shock absorber cylinder; 2- end cover; 3- connecting fork; 4- circular groove; 5- locking ring; 6- floating piston; 7- liquid chamber; 8- gas chamber; 9- O-ring; 10- mounting groove; 11- rubber gas plug; 12- elastic retaining ring; 13- columnar protrusion; 14- first inflation channel; 15- second inflation channel; 16- inflation hole; 17- blocking ball; 18- blocking bolt; 19- movable column; 20- air flow groove; 21- limit plate; 22- adjusting screw; 23- air guide groove; 24- hook body; 25- connecting plate; 26- vertical arm; 27- hook; 28- pin hole; 29- spring; 30- air inlet hole. 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 1:

[0028] like Figures 1 to 3 As shown, a new type of connecting fork structure includes a cylindrical shock absorber cylinder 1, an end cap 2 is fixedly mounted at the lower end of the shock absorber cylinder 1, and a connecting fork 3 is integrally formed at the bottom of the end cap 2 so as to connect the vehicle body suspension; a circular groove 4 matching the lower end of the shock absorber cylinder 1 is provided at the top of the end cap 2, and the lower end of the shock absorber cylinder 1 is inserted into the circular groove 4, a locking ring 5 is welded at the upper end of the end cap 2, and the locking ring 5 is threadedly connected to the outer wall of the lower end of the shock absorber cylinder 1 so as to remove the end cap 2 from the lower end of the shock absorber cylinder 1. A floating piston 6 is provided in the shock absorber cylinder 1, and a liquid chamber 7 located above the floating piston 6 is provided in the shock absorber cylinder 1, and the liquid chamber is filled with oil; a gas chamber 8 located below the floating piston 6 is provided in the shock absorber cylinder 1, and the gas chamber 8 is filled with nitrogen, and an inflation structure communicating with the gas chamber 8 is provided on the end cap 2.

[0029] The lower end of the shock absorber cylinder 1 is inserted into the circular groove 4 on the top of the end cover 2. An annular groove is provided on the inner wall of the circular groove 4. An O-ring 9 is embedded in the annular groove, thereby improving the sealing between the shock absorber cylinder 1 and the end cover 2.

[0030] like Figure 3 As shown, the inflation structure includes a mounting groove 10 arranged on the bottom wall of the circular groove 4. The mounting groove 10 is circular, and a cylindrical rubber gas plug 11 is embedded in the mounting groove 10. The rubber gas plug 11 has an interference fit with the inner wall of the mounting groove 10, and an annular embedding groove is provided on the inner wall of the mounting groove 10. A protruding elastic retaining ring 12 is arranged around the outer peripheral surface of the upper end of the rubber gas plug 11, and the elastic retaining ring 12 is embedded in the embedding groove of the inner wall of the mounting groove 10, so that the damaged rubber gas plug 11 can be removed and replaced conveniently; a pin hole 28 for inserting an inflation needle into the rubber gas plug 11 is provided at the bottom of the end cover 2, and the pin hole 28 is connected to the bottom of the mounting groove 10, and a channel for the inflation needle to pass through is provided on the rubber gas plug 11. When in use, the inflation needle is passed through the rubber gas plug 11 for inflation. After the inflation is completed, the inflation needle is pulled out, and the channel on the rubber gas plug 11 is elastically closed to prevent leakage.

[0031] Embodiment 2:

[0032] like Figures 4 to 7As shown, the difference between this embodiment and embodiment one is that this embodiment provides an inflation structure with better sealing performance. Specifically, the inflation structure includes a columnar protrusion 13 arranged on the bottom wall of the circular groove 4, the bottom of the end cover 2 is provided with a vertically extending first inflation channel 14, the top of the columnar protrusion 13 is provided with a vertically extending second inflation channel 15, and the columnar protrusion 13 is provided with an inflation hole 16 connecting the first inflation channel 14 and the lower end of the second inflation channel 15. The first inflation channel 14, the second inflation channel 15 and the inflation hole 16 are all coaxially arranged with the columnar protrusion 13; the second inflation channel 15 is provided with a blocking ball 17 for blocking the upper end of the inflation hole 16, and a blocking bolt 18 is fixedly installed in the upper end of the second inflation channel 15, and a spring 29 is connected between the blocking bolt 18 and the blocking ball 17. The diameter of the blocking ball 17 is smaller than the diameter of the second inflatable channel 15 and larger than the diameter of the inflatable hole 16. The bottom wall of the second inflatable channel 15 is inverted cone shape. When there is no external force, the spring 29 pushes the blocking ball 17 to fit on the inverted cone surface at the bottom of the second inflatable channel 15 to block the upper end of the inflatable hole 16. The outer wall of the columnar protrusion 13 is provided with an air inlet 30 connected to the second inflatable channel 15. The end cap 2 located at the periphery of the lower end of the first inflatable channel 14 protrudes downward to form an inflatable nozzle, which is located between the two fork legs of the connecting fork 3. The inflatable nozzle is convenient for connecting the lower end of the first inflatable channel 14 to the inflatable device. The first inflation channel 14 is inflated by the inflation device, and the air pressure in the first inflation channel 14 increases, thereby pushing the blocking ball 17 upward, so that the inflation hole 16 connects the first inflation channel 14 and the second inflation channel 15, and the gas enters the gas chamber through the first inflation channel 14, the inflation hole 16, the second inflation channel 15 and the air inlet hole 30 in sequence; after the inflation is stopped, the spring 29 pushes the blocking ball 17 again to fit onto the inverted cone surface at the bottom of the second inflation channel 15, and blocks the upper end of the inflation hole 16 to prevent leakage.

[0033] A movable column 19 is fixedly installed at the bottom of the blocking ball 17. The upper end of the movable column 19 is threadedly connected to the bottom of the blocking ball 17. The movable column 19 is vertically slidably installed in the inflation hole 16. Figure 6 As shown, a vertically extending airflow groove 20 is provided on the outer wall of the movable column 19. When inflating, the gas in the first inflatable channel 14 can enter the second inflatable channel 15 through the airflow groove 20 and the inner wall of the inflatable hole 16; the lower end of the movable column 19 extends into the first inflatable channel 14 and is integrally formed with a limiting plate 21; the first inflatable channel 14 located below the limiting plate 21 is threadedly connected with an adjusting screw 22, and the inner wall of the first inflatable channel is provided with a thread matching the adjusting screw 22, and the lower end of the adjusting screw 22 is provided with a hexagonal groove, such as Figure 7As shown, a vertically extending air guide groove 23 is provided on the outer side of the adjusting screw 22. When inflating, the gas at the lower end of the first air inflation channel 14 can flow upward between the air guide groove 23 and the inner wall of the first air inflation channel 14; when the adjusting screw 22 is rotated, it moves vertically along the first air inflation channel 14, and a hook body 24 for hooking the limit plate 21 is fixedly installed on the upper end of the adjusting screw 22.

[0034] Specifically, the hook body 24 is provided with a connecting plate 25 extending transversely, and the connecting plate 25 is fixedly mounted on the upper end of the adjusting screw 22 by welding or screws, and both ends of the connecting plate 25 are provided with vertical arms 26 extending upward, and the limit plate 21 is located between the two vertical arms 26, and the upper end of the vertical arm 26 extends to the upper side of the limit plate 21 and is provided with a hook portion 27 extending downwardly and obliquely toward the side close to the movable column 19. When inflating, the adjusting screw 22 is rotated counterclockwise and the hook body 24 is driven to move upward, so that the hook portion 27 moves upward away from the limit plate 21, thereby providing space for the limit plate 21 and the blocking ball 17 to float upward; after the inflation is completed, the adjusting screw 22 is rotated clockwise and the hook body 24 is driven to move downward, such as Figure 5 As shown, the hook body 24 pulls the limiting plate 21 downward through the hook portion 27 , so that the blocking ball 17 is closely attached to the bottom of the second inflation channel 15 and cannot move upward.

[0035] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A new type of connecting fork structure, characterized in that: It includes a shock absorber cylinder, an end cover is fixedly installed at the lower end of the shock absorber cylinder, a connecting fork is integrally formed at the bottom of the end cover, a circular groove matching the lower end of the shock absorber cylinder is provided on the top of the end cover, a locking ring is fixedly installed on the upper end of the end cover, and the locking ring is threadedly connected to the outer wall of the lower end of the shock absorber cylinder; a floating piston is provided in the shock absorber cylinder, a gas chamber is provided below the floating piston, and an inflation structure connected to the gas chamber is provided on the end cover.

2. A new type of connecting fork structure as claimed in claim 1, characterized in that: An O-type sealing ring is arranged on the inner wall of the circular groove.

3. A new type of connecting fork structure as claimed in claim 1, characterized in that: The inflation structure comprises a mounting groove arranged on the bottom wall of the circular groove, a rubber gas plug is embedded in the mounting groove, and a pin hole for inserting an inflation needle into the rubber gas plug is arranged at the bottom of the end cover.

4. A novel connecting fork structure as claimed in claim 1, characterized in that: The inflation structure includes a columnar protrusion arranged on the bottom wall of the circular groove, the bottom of the end cover is provided with a first inflation channel extending vertically, the top of the columnar protrusion is provided with a second inflation channel extending vertically, and the columnar protrusion is provided with an inflation hole connecting the first inflation channel and the lower end of the second inflation channel; the second inflation channel is provided with a blocking ball for blocking the upper end of the inflation hole, and a blocking bolt is fixedly installed in the upper end of the second inflation channel, and a spring is connected between the blocking bolt and the blocking ball; the outer wall of the columnar protrusion is provided with an air inlet hole connecting the second inflation channel.

5. A new type of connecting fork structure as claimed in claim 4, characterized in that: A movable column is fixedly installed at the bottom of the blocking ball, and the movable column is vertically slidably installed in the inflation hole. The lower end of the movable column extends into the first inflation channel and is fixedly installed with a limit plate; an adjusting screw is threadedly connected in the first inflation channel below the limit plate, and the adjusting screw moves vertically along the first inflation channel when it is rotated, and a hook body for hooking the limit plate is fixedly installed on the upper end of the adjusting screw.

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