Novel piston rod and air chamber structure

Abstract

The utility model discloses a novel piston rod and an air chamber structure, the novel piston rod comprises a rod body, a special blanking cap, a ball pin and a threaded plug, a cavity is arranged in the rod body, and a connecting hole communicated with the cavity is arranged at the rear end of the rod body; the special blanking cap comprises a blanking cap body, the rear end of the blanking cap body is inserted into the opening in the front end of the rod body, and a limiting boss used for abutting against the front end of the rod body is arranged on the outer side wall of the blanking cap body. A through hole penetrating front and back is formed in the blanking cap body, internal threads are arranged on the inner wall of the rear end of the through hole, and an anti-falling necking opening is formed in the front end of the through hole. The ball pin comprises a pin shaft, a connecting shaft and a ball head, the ball head is located in the through hole, one end of the connecting shaft is connected with the rear end of the pin shaft, and the other end of the connecting shaft penetrates through the anti-falling necking opening and then is connected with the ball head; the threaded plug comprises a plug body, the plug body is arranged in the through hole, and external threads matched with the internal threads are arranged on the outer side wall of the plug body.

Description

Technical Field

[0001] The utility model relates to the technical field of auto parts and components, in particular to a novel piston rod and air chamber structure. Background Art

[0002] The existing rear axle air chamber assembly includes a driving air chamber and a parking air chamber, which are large in size and do not meet the assembly space of existing products; the reliability and safety of industrial cylinders are poor, and when there is no gas source, the piston rod is in a relaxed state, which does not meet the product use requirements.

[0003] In order to solve the above problems, the Chinese patent document "An Air Chamber Structure" (patent application number: 2023234357933) discloses an air chamber structure, in which a connecting block is provided at the front end of the piston rod of the air chamber structure, the ball socket is located at the front end of the connecting block, and a retaining spring is provided in the ball socket to prevent the ball head from falling out.

[0004] However, in actual use of the above structure, it is found that the retaining spring is prone to breakage, causing the ball head to fall out, thus shortening the service life of the product. Utility Model Content

[0005] In view of the defects existing in the prior art, the purpose of the utility model is to provide a new piston rod and air chamber structure, which adopts a special plug cover and a threaded plug to achieve the limitation of the ball head and extend the service life of the product.

[0006] To achieve the above objectives, the technical solution adopted by the utility model is: a new type of piston rod, including a rod body, a cavity is provided inside the rod body, a connecting hole connected to the cavity is provided at the rear end of the rod body, and also includes a special plugging cover, a ball pin and a threaded plug; the special plugging cover includes a plugging cover body, the rear end of the plugging cover body is inserted into the front end opening of the rod body, and the outer wall of the plugging cover body is provided with a limiting boss for supporting the front end of the rod body; a through hole passing through the front and back is provided in the plugging cover body, and the rear end inner wall of the through hole is provided with an internal thread, and the front end of the through hole is provided with an anti-shrinkage opening; the ball pin includes a pin shaft, a connecting shaft and a ball head, the ball head is located in the through hole, one end of the connecting shaft is connected to the rear end of the pin shaft, and the other end of the connecting shaft is connected to the ball head after passing through the anti-shrinkage opening; the threaded plug includes a plug body, the plug body is arranged in the through hole, and the outer wall of the plug body is provided with an external thread matching the internal thread.

[0007] A further improvement is that: the front end of the plug body is provided with a groove matched with the ball head; the rear end of the plug body is connected to the connection disk located at the rear end of the special plug cover through a connecting block.

[0008] A further improvement is that the swing angle of the pin is 20°.

[0009] The utility model also provides an air chamber structure, including a shell, a cover body and a novel piston rod as described above; the front end of the shell is an open end, and a piston is arranged inside the shell, and the piston divides the inside of the shell from front to back into a first chamber and a second chamber; the cover body is used to close the open end of the shell; the rear end of the novel piston rod passes through the cover body and is connected to the piston.

[0010] A further improvement is that a spring is arranged in the second chamber.

[0011] A further improvement is that a through hole communicating with the second chamber and a plugging cover for blocking the through hole are provided at the center of the rear end surface of the shell.

[0012] Further improvements are: the cover body is a forging structure, and a center hole for the new piston rod to pass through is provided at the center of the cover body; the edge of the center hole extends backward to form a guide boss; a first sealing ring and a first sealing ring are provided between the guide boss and the new piston rod.

[0013] A further improvement is that the cover body is provided with an air inlet communicating with the first chamber, and a release bolt connected to the air inlet.

[0014] A further improvement is that a second sealing ring is provided at the connection between the piston and the novel piston rod, and a second sealing ring and a third sealing ring are provided at the connection between the piston and the inner wall of the housing.

[0015] A further improvement is that the inner wall of the housing, the outer surface of the novel piston rod, the first sealing ring, the first sealing ring, the second sealing ring, the second sealing ring and the third sealing ring are all coated with lithium-based grease.

[0016] The beneficial effects of the utility model are:

[0017] The utility model adopts the cooperation of a special plugging cover and a threaded plugging head to realize the limiting of the ball head, thereby extending the service life of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of a new piston rod in an embodiment of the utility model;

[0019] Figure 2 This is a schematic diagram of the connection between the special plug cover, the threaded plug and the ball pin in the embodiment of the utility model;

[0020] Figure 3 This is a schematic diagram of the connection of the special plugging cover in the embodiment of the utility model;

[0021] Figure 4 This is a schematic diagram of the connection of the ball pin in the embodiment of the utility model;

[0022] Figure 5This is a schematic diagram of the connection of the threaded plug in the embodiment of the utility model;

[0023] Figure 6 This is a schematic diagram of the structure of the air chamber in the embodiment of the utility model;

[0024] Figure 7 It is a cross-sectional view of the cover body in the embodiment of the utility model;

[0025] Figure 8 It is a schematic diagram of the connection between the piston and the piston rod in the embodiment of the utility model.

[0026] Reference numerals:

[0027] 1-housing; 11-first chamber; 12-second chamber; 13-spring; 14-through hole; 15-blocking cover;

[0028] 2-cover body; 21-center hole; 22-air inlet; 23-release bolt; 24-guide boss; 25-first sealing ring; 26-first sealing ring;

[0029] 3-piston; 31-second sealing ring; 32-second sealing ring; 33-third sealing ring;

[0030] 4-new piston rod; 41-rod body; 42-cavity; 43-connecting hole; 44-special plugging cover; 441-plugging cover body; 442-through hole; 443-internal thread; 444-anti-shrinkage port; 445-limiting boss; 45-ball pin; 451-pin shaft; 452-ball head; 453-connecting shaft; 46-threaded plug; 461-connecting plate; 462-plugging cover body; 463-external thread; 464-groove; 465-connecting block. DETAILED DESCRIPTION

[0031] The embodiments of the present invention are described in detail below. The embodiments are shown in the accompanying drawings, wherein the same or similar numbers throughout represent the same or similar elements or elements with the same or similar functions.

[0032] In the description of the present invention, it should be noted that directional words, such as the terms "center", "lateral (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of narrating the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific protection scope of the present invention.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. Therefore, the definition of "first" and "second" features can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "several" and "a number" is two or more, unless otherwise clearly and specifically defined.

[0034] The following is a further description of the specific implementation of the utility model in conjunction with the drawings of the specification, so that the technical solution and its beneficial effects of the utility model are clearer and more explicit. The following description of the embodiments with reference to the drawings is exemplary and intended to explain the utility model, but cannot be understood as limiting the utility model.

[0035] See also Figure 1 and Figure 2 As shown, the embodiment of the utility model provides a new piston rod, including a rod body 41, a cavity 42 is arranged inside the rod body 41, a connecting hole 43 communicating with the cavity 42 is arranged at the rear end of the rod body 41, and also includes a special plug cover 44, a ball pin 45 and a threaded plug 46;

[0036] See also Figure 3 As shown, the special plugging cover 44 includes a plugging cover body 441, the rear end of the plugging cover body 441 is inserted into the front end opening of the rod body 41, and the outer side wall of the plugging cover body 441 is provided with a limiting boss 445 for resisting the front end of the rod body 41; a through hole 442 is provided in the plugging cover body 441, which passes through the front and back, and the rear end inner wall of the through hole 442 is provided with an internal thread 443, and the front end of the through hole 442 is provided with an anti-shrinkage opening 444;

[0037] See also Figure 4 As shown, the ball pin 45 includes a pin shaft 451, a connecting shaft 453 and a ball head 452. The ball head 452 is located in the through hole 442. One end of the connecting shaft 453 is connected to the rear end of the pin shaft 451, and the other end of the connecting shaft 453 is connected to the ball head 452 after passing through the anti-shrinkage opening 444. Specifically, the swing angle of the pin shaft 451 is 20°.

[0038] See also Figure 5 As shown, the threaded plug 46 includes a plug body 462, which is disposed in the through hole 442 and the outer wall of the plug body 462 is provided with an outer thread 463 adapted to the inner thread 443. Specifically, the front end of the plug body 462 is provided with a groove 464 adapted to the ball head 452; the rear end of the plug body 462 is connected to the connection plate 461 located at the rear end of the special plug cover 44 through a connection block 465.

[0039] See also Figure 6 to Figure 8As shown, the utility model also provides an air chamber structure, including a housing 1, a cover 2 and the new piston rod 4 as described above; the front end of the housing 1 is an open end, and a piston is arranged inside the housing 1, and the piston divides the interior of the housing 1 from front to back into a first chamber 11 and a second chamber 12; the cover 2 is used to close the open end of the housing 1; the rear end of the new piston rod 4 passes through the cover 2 and is connected to the piston. A spring 13 is arranged in the second chamber 12. A through hole 14 communicating with the second chamber 12 and a plug 15 for blocking the through hole 14 are arranged at the center of the rear end surface of the housing 1. The cover 2 is a forging structure, and a center hole 21 for the new piston rod 4 to penetrate is arranged at the center of the cover 2; the edge of the center hole 21 extends backward to form a guide boss 24; a first sealing ring 25 and a first sealing ring 26 are arranged between the guide boss 24 and the new piston rod 4. The cover body 2 is provided with an air inlet 22 communicating with the first chamber 11, and a release bolt 23 connected to the air inlet 22. A second sealing ring 31 is provided at the connection between the piston and the new piston rod 4, and a second sealing ring 32 and a third sealing ring 33 are provided at the connection between the piston and the inner wall of the housing 1. The inner wall of the housing 1, the outer surface of the new piston rod 4, the first sealing ring 25, the first sealing ring 26, the second sealing ring 31, the second sealing ring 32 and the third sealing ring 33 are all coated with lithium-based grease.

[0040] In the description of the specification, the description with reference to the terms "one embodiment", "preferably", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model, and the schematic expressions of the above terms in this specification do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0041] Through the description of the above structure and principle, technicians in the relevant technical field should understand that the present invention is not limited to the above-mentioned specific implementation methods. Improvements and substitutions based on the present invention using the known technology in the field all fall within the protection scope of the present invention and should be defined by the claims.

Claims

1. A novel piston rod, comprising a rod body (41), wherein a cavity (42) is provided inside the rod body (41), and a connecting hole (43) communicating with the cavity (42) is provided at the rear end of the rod body (41), characterized in that: It also includes a special plug cover (44), a ball pin (45) and a threaded plug (46); The special plugging cover (44) comprises a plugging cover body (441), the rear end of the plugging cover body (441) is inserted into the front end opening of the rod body (41), and the outer side wall of the plugging cover body (441) is provided with a limiting boss (445) for abutting against the front end of the rod body (41); a through hole (442) passing through the front and back is provided in the plugging cover body (441), and the rear end inner wall of the through hole (442) is provided with an internal thread (443), and the front end of the through hole (442) is provided with an anti-shrinkage opening (444); The ball pin (45) comprises a pin shaft (451), a connecting shaft (453) and a ball head (452); the ball head (452) is located in the through hole (442); one end of the connecting shaft (453) is connected to the rear end of the pin shaft (451); and the other end of the connecting shaft (453) passes through the anti-shrinkage opening (444) and is connected to the ball head (452); The threaded plug (46) comprises a plug body (462), the plug body (462) is arranged in the through hole (442), and the outer wall of the plug body (462) is provided with an external thread (463) that matches the internal thread (443).

2. The novel piston rod according to claim 1 is characterized in that: The front end of the plug body (462) is provided with a groove (464) adapted to the ball head (452); the rear end of the plug body (462) is connected to a connection plate (461) located at the rear end of the special plug cover (44) through a connection block (465).

3. The novel piston rod according to claim 1 is characterized in that: The swing angle of the pin shaft (451) is 20°.

4. An air chamber structure, comprising a housing (1), characterized in that: It also includes a cover body (2) and a new piston rod (4) as described in any one of claims 1 to 3; the front end of the shell (1) is an open end, and a piston is arranged inside the shell (1), and the piston divides the inside of the shell (1) from front to back into a first chamber (11) and a second chamber (12); the cover body (2) is used to close the open end of the shell (1); the rear end of the new piston rod (4) passes through the cover body (2) and is connected to the piston.

5. The air chamber structure according to claim 4, characterized in that: A spring (13) is arranged in the second chamber (12).

6. The air chamber structure according to claim 4, characterized in that: A through hole (14) communicating with the second chamber (12) and a plugging cover (15) for plugging the through hole (14) are provided at the center of the rear end surface of the housing (1).

7. The air chamber structure according to claim 4, characterized in that: The cover body (2) is a forged structure, and a center hole (21) is provided at the center of the cover body (2) for the new piston rod (4) to penetrate; the edge of the center hole (21) extends backward to form a guide boss (24); a first sealing ring (25) and a first sealing ring (26) are provided between the guide boss (24) and the new piston rod (4).

8. The air chamber structure according to claim 4, characterized in that: The cover body (2) is provided with an air inlet (22) communicating with the first chamber (11), and a release bolt (23) connected to the air inlet (22).

9. The air chamber structure according to claim 4, characterized in that: A second sealing ring (31) is provided at the connection between the piston and the novel piston rod (4), and a second sealing ring (32) and a third sealing ring (33) are provided at the connection between the piston and the inner wall of the housing (1).

10. The air chamber structure according to claim 7 or 9, characterized in that: The inner wall of the housing (1), the outer surface of the novel piston rod (4), the first sealing ring (25), the first sealing ring (26), the second sealing ring (31), the second sealing ring (32) and the third sealing ring (33) are all coated with lithium-based grease.

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