Automotive chassis upper arm assembly

Abstract

The application discloses an automobile chassis upper arm assembly which comprises a fixing shaft, a rocker arm and two positioning pins, the rocker arm is in a U shape and is provided with two sleeves coaxial with each other at two ends, the sleeves are provided with internal threads, the two positioning pins are provided with external threads and are fixedly screwed into the two sleeves respectively, opposite ends of the two positioning pins are provided with screw holes respectively, the screw threads of the screw holes of the two positioning pins are the same as the internal threads of the corresponding sleeves, the two ends of the fixing shaft are provided with external threads, and the two ends of the fixing shaft are rotatably screwed into the screw holes of the two positioning pins respectively. The positioning pins are fixedly screwed into the sleeves through the external threads, the ends of the fixing shaft are provided with external threads, and the ends of the fixing shaft are rotatably screwed into the screw holes of the positioning pins through the external threads, so that the rocker arm can rotate relative to the fixing shaft, and the axial bearing capacity between the fixing shaft and the rocker arm is effectively improved through the rotatable screwing.

Description

Technical Field

[0001] This utility model relates to the technical field of automotive chassis parts, and more specifically to an automotive chassis upper arm assembly. Background Technology

[0002] The upper control arm assembly of a car chassis is a key component of the suspension system. Its main structure includes a fixed shaft for mounting to the frame and a rocker arm for mounting the wheel steering knuckle. Through the rotational engagement between the fixed shaft and the rocker arm, the guiding and force transmission between the frame and the wheels is achieved, which is crucial to the vehicle's handling stability, ride comfort, and safety.

[0003] In traditional designs, a ball joint is typically placed at the end of the fixed shaft, and a bushing is placed at the end of the rocker arm. The relative rotation between the fixed shaft and the rocker arm is achieved through the rotational engagement of the ball joint and the bushing. While this structure meets basic rotational requirements, with increasing use, the ball joint and bushing will continuously wear down, gradually altering their contact surface and deteriorating their stress state. This is especially problematic for heavy-duty trucks and transport vehicles with high load-bearing requirements, where the large axial forces during acceleration and deceleration exacerbate wear between the ball joint and bushing, leading to loosening or failure of the connection and threatening driving safety. Utility Model Content

[0004] The purpose of this invention is to solve the problem that in the prior art, as the upper arm assembly is used for a longer period of time, the ball joint and bushing will wear down continuously, causing the contact surface between the two to gradually change and the stress state to gradually deteriorate. This is especially true for heavy trucks, transport vehicles and other vehicles with high load-bearing requirements, where the axial force during acceleration and deceleration is large, which aggravates the wear between the ball joint and bushing, leading to loosening or failure of the connection and threatening driving safety.

[0005] To solve the above problems, this utility model provides an upper arm assembly for an automobile chassis, including a fixed shaft, a rocker arm, and two positioning bolts. The rocker arm is U-shaped and has coaxial sleeves at both ends. The sleeves have internal threads. The two positioning bolts have external threads and are fixedly screwed into the two sleeves. The opposite ends of the two positioning bolts have screw holes, and the thread direction of the screw holes of the two positioning bolts is the same as the internal thread of the corresponding sleeve. The two ends of the fixed shaft have external threads, and the two ends of the fixed shaft are rotatably screwed into the screw holes of the two positioning bolts.

[0006] Compared with existing technologies, the above solution uses a positioning bolt, which is fixedly screwed to the internal thread of the sleeve through an external thread. At the same time, external threads are provided at both ends of the fixed shaft, and the ends of the fixed shaft are rotatedly screwed to the threaded holes of the positioning bolt through external threads. This ensures that the rocker arm can rotate relative to the fixed shaft, while effectively improving the axial load-bearing capacity between the fixed shaft and the rocker arm through the rotational screwing connection. It is especially suitable for heavy trucks, transport vehicles and other vehicles with high load-bearing requirements.

[0007] In an improved embodiment, two annular dust covers are also included. The side walls at both ends of the fixed shaft are respectively provided with raised steps. The two dust covers are respectively sleeved on both ends of the fixed shaft. The opposite sides of the two dust covers abut against the opposite sides of the two sleeves, and the opposite sides of the two dust covers abut against the two steps. Thus, the dust covers provide protection between the fixed shaft, the positioning bolt, and the sleeves, effectively preventing dust from entering.

[0008] In an improved embodiment, the dust cover is filled with lubricating oil or grease, which can enter between the end of the fixed shaft and the screw hole to improve the smoothness of their relative rotation.

[0009] In an improved embodiment, the opposite ends of the two positioning bolts protrude from the corresponding sleeves, the inner peripheral walls of the opposite sides of the two dust covers abut against the protruding parts of the corresponding positioning bolts, and the inner peripheral walls of the opposite sides of the two dust covers abut against the outer peripheral wall of the fixed shaft, thereby improving the fit of the dust covers, enhancing the protective effect, and preventing the leakage of lubricating oil or grease.

[0010] In an improved embodiment, the inner peripheral walls on opposite sides and opposite sides of the dust cover are respectively provided with sealing grooves, thereby further improving the sealing performance of the dust cover and preventing leakage of lubricating oil or grease.

[0011] In an improved embodiment, the opposite ends of the positioning bolts protrude from the corresponding sleeves and are provided with nuts. The nuts of the two positioning bolts abut against the opposite sides of the two sleeves, thereby achieving axial positioning through the nuts.

[0012] In an improved design, the sleeve, locating bolt, and fixing shaft are all made of the same metal material, ensuring good consistency and load-bearing capacity. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of an upper arm assembly for a car chassis. Figure 2 This is a partial cross-sectional schematic diagram of an upper arm assembly of an automobile chassis; Figure 3 for Figure 2 A magnified view of a portion of region A in the middle.

[0014] Explanation of reference numerals in the attached figures. 1. Fixed shaft; 11. Step; 2. Rocker arm; 21. Sleeve; 3. Positioning bolt; 31. Screw hole; 32. Nut; 4. Dust cover; 41. Sealing groove. Detailed Implementation

[0015] It should be understood by those skilled in the art that the following embodiments are merely illustrative of the technical principles of the embodiments of this application and are not intended to limit the scope of protection of the embodiments of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0016] In the following description of the embodiments, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0017] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0018] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0019] Please see Figures 1-3 The present invention provides an upper arm assembly for an automobile chassis, comprising a fixed shaft 1, a rocker arm 2, and two positioning bolts 3. The rocker arm 2 is U-shaped and has coaxial sleeves 21 at both ends. The sleeves 21 have internal threads. The two positioning bolts 3 are both externally threaded and are fixedly screwed into the two sleeves 21. The opposite ends of the two positioning bolts 3 are respectively provided with screw holes 31, and the thread direction of the screw holes 31 of the two positioning bolts 3 is the same as the internal thread of the corresponding sleeve 21. The two ends of the fixed shaft 1 are respectively provided with external threads, and the two ends of the fixed shaft 1 are respectively rotatably screwed into the screw holes 31 of the two positioning bolts 3.

[0020] The above solution uses a positioning bolt 3, which is fixedly threaded to the internal thread of the sleeve 21 via an external thread. At the same time, external threads are provided at both ends of the fixed shaft 1, and the ends of the fixed shaft 1 are rotatably threaded to the threaded holes 31 of the positioning bolt 3 via external threads. This ensures that the rocker arm 2 can rotate relative to the fixed shaft 1, while effectively improving the axial load-bearing capacity between the fixed shaft 1 and the rocker arm 2 through the rotatable threaded connection. It is especially suitable for heavy trucks, transport vehicles and other vehicles with high load-bearing requirements.

[0021] In the above scheme, the internal thread of the sleeve 21 matches the external thread of the positioning bolt 3, and the thread of the screw hole 31 matches the external thread of the fixed shaft 1. At the same time, since the screw hole 31 of the two positioning bolts 3 has the same thread direction as the corresponding internal thread of the sleeve 21, it is ensured that during assembly, both ends of the fixed shaft 1 can be first extended into the two sleeves 21 respectively, and then the two positioning bolts 3 can be screwed into the end of the fixed shaft 1 and the sleeve 21 respectively. The sleeve 21 and the positioning bolt 3 can be fixedly screwed together by thread glue or welding, while the fixed shaft 1 and the screw hole 31 can be further lubricated with lubricating oil or grease to achieve a smoother rotation screwing connection.

[0022] As an improvement to this embodiment, two annular dust covers 4 are also included. The side walls at both ends of the fixed shaft 1 are respectively provided with raised steps 11. The two dust covers 4 are respectively sleeved on both ends of the fixed shaft 1. The opposite sides of the two dust covers 4 abut against the opposite sides of the two sleeves 21, and the opposite sides of the two dust covers 4 abut against the two steps 11. Thus, the dust covers 4 can protect the fixed shaft 1, the positioning bolt 3 and the sleeves 21, effectively preventing dust from entering.

[0023] Furthermore, the dust cover 4 is filled with lubricating oil or grease, which can enter between the end of the fixed shaft 1 and the screw hole 31, improving the smoothness of their relative rotation.

[0024] In this embodiment, the opposite ends of the two positioning bolts 3 protrude from the corresponding sleeves 21, the inner peripheral walls of the opposite sides of the two dust covers 4 abut against the protruding parts of the corresponding positioning bolts 3 in the sleeves 21, and the inner peripheral walls of the opposite sides of the two dust covers 4 abut against the outer peripheral wall of the fixed shaft 1, thereby improving the fit of the dust covers 4, enhancing the protective effect, and preventing the leakage of lubricating oil or grease.

[0025] Furthermore, the inner peripheral walls on the opposite side and the inner peripheral walls on the opposite side of the dust cover 4 are respectively provided with sealing grooves 41, thereby further improving the sealing performance of the dust cover 4 and preventing the leakage of lubricating oil or grease.

[0026] In this embodiment, the opposite ends of the positioning bolts 3 protrude from the corresponding sleeves 21 and are provided with nuts 32. The nuts 32 of the two positioning bolts 3 respectively abut against the opposite sides of the two sleeves 21, thereby achieving axial positioning through the nuts 32.

[0027] In this embodiment, the sleeve 21, the positioning bolt 3, and the fixing shaft 1 are all made of the same metal material, and have good consistency.

[0028] It should be noted that in the description of this application, the terms "inner" and "outer," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application. All directional indications (such as up, down, left, right, front, back, inner, and outer) are only used to explain the relative positional relationships and movement between components in a specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0029] In the description of this application, the references to terms such as "an embodiment," "some embodiments," "in this embodiment," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0030] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An automotive chassis upper arm assembly, characterized by, The device comprises a fixed shaft (1), a rocker arm (2) and two positioning pins (3), the rocker arm (2) is U-shaped and has two sleeves (21) with coaxial lines at two ends, the sleeves (21) are internally threaded, the two positioning pins (3) are externally threaded and are screwed into the two sleeves (21) respectively, the opposite ends of the two positioning pins (3) are provided with screw holes (31), the screw threads of the screw holes (31) of the two positioning pins (3) are the same as the internal threads of the corresponding sleeves (21), the two ends of the fixed shaft (1) are externally threaded, and the two ends of the fixed shaft (1) are screwed into the screw holes (31) of the two positioning pins (3) respectively.

2. The automotive chassis upper arm assembly of claim 1, wherein, The device further comprises two annular dust covers (4), the side peripheral walls of the two ends of the fixed shaft (1) are provided with protruding steps (11), the two dust covers (4) are sleeved on the two ends of the fixed shaft (1) respectively, the opposite sides of the two dust covers (4) are in abutment with the opposite sides of the two sleeves (21) respectively, and the opposite sides of the two dust covers (4) are in abutment with the two steps (11) respectively.

3. The automotive chassis upper arm assembly of claim 2, wherein, The dust covers (4) are filled with lubricating oil or grease.

4. The automotive chassis upper arm assembly of claim 2 or 3, wherein, The opposite ends of the two positioning pins (3) protrude from the corresponding sleeves (21), the inner peripheral walls of the opposite sides of the two dust covers (4) are in abutment with the parts of the two positioning pins (3) protruding from the sleeves (21), and the inner peripheral walls of the opposite sides of the two dust covers (4) are in abutment with the outer peripheral walls of the fixed shaft (1).

5. The automotive chassis upper arm assembly of claim 4, wherein, The inner peripheral walls of the opposite sides and the inner peripheral walls of the opposite sides of the dust covers (4) are provided with sealing grooves (41) respectively.

6. The automotive chassis upper arm assembly of claim 1, wherein, The opposite ends of the two positioning pins (3) protrude from the corresponding sleeves (21) and are provided with nuts (32), and the nuts (32) of the two positioning pins (3) are in abutment with the opposite sides of the two sleeves (21) respectively.

7. The automotive chassis upper arm assembly of claim 1, wherein, The sleeves (21), the positioning pins (3) and the fixed shaft (1) are made of the same metal material.

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