Connecting shaft of automobile upper support arm, automobile upper support arm and automobile
By designing a connecting shaft composed of a screw, upper shaft core, lower shaft core and first nut, the problem of the car's upper arm connection shaft falling off is solved, achieving higher stability and safety, and in the bumps Provide better buffering on the road surface.
Patent Information
- Application Number
- CN202421345752.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-12
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-06-12
AI Technical Summary
The connecting shaft of the upper arm of the car is prone to fall off during long-term use, resulting in safety hazards.
A connecting shaft is designed, consisting of a screw, an upper shaft core, a lower shaft core and a first nut. The screw is not fixed to other parts, allowing it to remain mobility when friction and heat up, avoid loosening or falling off.
It effectively avoids the problem of the connection shaft falling off, improves the stability and safety of the car's upper arm, and provides a greater buffering effect when the road surface is bumpy, ensuring that the vehicle is driving more stable.
Smart Images
Figure CN222495998U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of automobile steering control, and in particular to a connecting shaft of an automobile upper support arm, an automobile upper support arm and an automobile. Background Art
[0002] The upper arm of a car is an important component of the chassis suspension system. It elastically links the car body and wheels together. When the vehicle is driving, the shock absorber and the arm cooperate to elastically connect the vehicle and the frame, so as to reduce the impact force caused by the road surface during driving, thereby ensuring the comfort of passengers when the vehicle is driving, attenuating the vibration caused by the elastic system, and transmitting the reaction force and torque from all directions, so that the wheels move relative to the car body along a certain trajectory, playing a certain guiding role. Therefore, the upper arm of a car plays a very important role in the comfort, stability and safety of the vehicle, and is also one of the most important parts of the car.
[0003] During long-term use of the current upper support arm of an automobile, the connecting shaft of the upper support arm of the automobile may fall off, which may easily lead to safety hazards. Utility Model Content
[0004] The purpose of the present application is to provide a connecting shaft of an automobile upper support arm, an automobile upper support arm and an automobile, which can greatly avoid the problem of the connecting shaft of the automobile upper support arm falling off.
[0005] The present application discloses a connecting shaft of an upper support arm of an automobile, wherein the connecting shaft cooperates with a mounting hole of the upper support arm of the automobile, the connecting shaft comprises a screw rod, an upper shaft core, a lower shaft core and a first nut, the screw rod comprises a rod head and a rod body, the rod head is located at one end of the rod body, and the cross-sectional area of the rod head is larger than the cross-sectional area of the rod body; the upper shaft core has a first axial center hole, the lower shaft core has a second axial center hole, the rod body is provided with the first axial center hole and the second axial center hole, and the minimum cross-sectional area of the first axial center hole is smaller than the cross-sectional area of the rod head; the first nut is threadedly connected to the rod body, the upper shaft core and the lower shaft core are located between the rod head and the first nut, and the upper shaft core is located between the lower shaft core and the rod head.
[0006] Optionally, the upper shaft core includes a first extension portion and a first plug-in portion that are connected to each other, the edge size of the first extension portion is larger than the edge size of the first plug-in portion, and the first extension portion and the first plug-in portion are internally hollow to form the first axial center hole; the lower shaft core includes a second plug-in portion, a second extension portion and an extension portion that are connected in sequence, the edge size of the second extension portion is larger than the edge size of the second plug-in portion, and the second plug-in portion, the second extension portion and the extension portion are internally hollow to form the second axial center hole, and the second plug-in portion is arranged opposite to the first plug-in portion; the first plug-in portion and the second plug-in portion are respectively inserted into the mounting hole from both sides of the mounting hole, and the first extension portion and the second extension portion are respectively abutted against both sides of the mounting hole.
[0007] Optionally, the extension portion includes a first extension section, a third extension section, and a second extension section connected in sequence, the first extension section is connected to the second extension section, and the second plug-in section, the second extension section, the first extension section, the third extension section, and the second extension section have internal hollow portions to form the second axial hole; the edge size of the third extension section is smaller than the edge size of the second extension section, and larger than the edge size of the first extension section; the edge size of the first extension section is larger than the edge size of the second extension section, and the edge size of the second extension section gradually decreases from the first extension section to the second extension section.
[0008] Optionally, an edge dimension of a side of the first extension portion close to the first plug-in portion is greater than an edge dimension of a side of the first extension portion away from the first plug-in portion, and an edge dimension of a side of the second extension portion close to the second plug-in portion is greater than an edge dimension of a side of the second extension portion away from the second plug-in portion.
[0009] Optionally, the first axial hole includes an upper sub-hole and a lower sub-hole that are connected, the central axes of the upper sub-hole and the lower sub-hole coincide, the upper sub-hole is located on the side of the lower sub-hole away from the lower axial core, and the cross-sectional area of the upper sub-hole is larger than the cross-sectional area of the lower sub-hole; the cross-sectional area of the upper sub-hole is larger than the cross-sectional area of the rod head, the cross-sectional area of the rod head is larger than the cross-sectional area of the lower sub-hole, and the depth of the upper sub-hole is greater than or equal to the height of the rod head.
[0010] Optionally, the connecting shaft further includes a gasket, the rod is inserted into a central through hole of the gasket, and the gasket is located between the first nut and the lower shaft core.
[0011] The present application also discloses an upper support arm for a vehicle, comprising an arm body and a connecting shaft of the upper support arm for a vehicle as described above, wherein a mounting hole is provided on the arm body, wherein the mounting hole is a through hole, and the central axis direction of the mounting hole is the same as the thickness direction of the arm body, and the screw of the connecting shaft is passed through the mounting hole and is rotatably connected to the arm body; the upper shaft core and the lower shaft core are respectively abutted against two sides of the arm body.
[0012] Optionally, the arm body includes a main body and a bearing, the main body is provided with a fixing hole, the bearing is arranged in the fixing hole and connected to the main body, the inner ring of the bearing forms the mounting hole, and the screw is rotatably connected to the bearing; the upper shaft core and the lower shaft core are respectively abutted against two sides of the bearing; the upper arm of the automobile also includes a protective cover, which is connected to one side of the main body close to the upper shaft core and covers the bearing and the connecting shaft.
[0013] Optionally, the upper support arm of the automobile also includes two steering heads, and the two steering heads are respectively connected to the two ends of the support arm body; the steering head includes a steering threaded rod, a steering fixing sleeve, a second nut, an inner core and an outer core, and end threaded holes are provided at both ends of the support arm body, the steering threaded rod is inserted into the end threaded holes and is threadedly connected to the support arm body, the steering fixing sleeve is connected to the steering threaded rod, and the second nut is sleeved on the steering threaded rod and is threadedly connected to the steering threaded rod; a sleeve hole is provided on the steering fixing sleeve, and the inner core and the outer core are respectively inserted into the sleeve holes from both sides of the steering fixing sleeve and are connected to the steering fixing sleeve, and the interiors of the inner core and the outer core are hollow.
[0014] The application also discloses a vehicle, which comprises the vehicle upper support arm as described above.
[0015] The beneficial effect of the present application is that: compared with the current scheme of designing the screw and the upper shaft core as an integrated whole, or connecting the screw and the upper shaft core by gluing, the present application designs the connecting shaft as a structure composed of the screw, the upper shaft core, the lower shaft core and the first nut. The screw is not fixed to other parts. When the car is running for a long time, causing the friction and heating of the connecting shaft, the screw and other structures will not loosen or fall off, and it is not easy to cause safety hazards. Moreover, such a design also enables the screw and the upper shaft core and the lower shaft core to rotate and deflect after the upper arm of the car is installed, so that the screw has a certain activity space. When the road surface on which the car is driving is bumpy, the connecting shaft can provide a greater buffering effect, making the car drive more stable. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The included drawings are used to provide a further understanding of the embodiments of the present application, which constitute a part of the specification, are used to illustrate the implementation methods of the present application, and together with the text description, explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:
[0017] Figure 1 It is a front schematic diagram of an upper support arm of a vehicle provided in an embodiment of the present application;
[0018] Figure 2 It is a schematic diagram of the back side of an upper support arm of a vehicle provided in an embodiment of the present application;
[0019] Figure 3 It is an overall schematic diagram of a body provided in an embodiment of the present application;
[0020] Figure 4 It is an exploded schematic diagram of a body provided in an embodiment of the present application;
[0021] Figure 5 It is a front schematic diagram of a connecting shaft provided in an embodiment of the present application;
[0022] Figure 6 is a front view schematic diagram of another connecting shaft provided in an embodiment of the present application;
[0023] Figure 7 is a three-dimensional schematic diagram of a connecting shaft provided in an embodiment of the present application;
[0024] Figure 8 is a cross-sectional schematic diagram of a connecting shaft provided in an embodiment of the present application;
[0025] Fig. 9 It is an overall schematic diagram of another upper support arm of a vehicle provided in an embodiment of the present application;
[0026] Fig.10 It is an exploded schematic diagram of another upper support arm of a vehicle provided in an embodiment of the present application;
[0027] Fig.11 It is an overall schematic diagram of a steering head provided in an embodiment of the present application;
[0028] Fig.12 It is an exploded schematic diagram of a steering head provided in an embodiment of the present application.
[0029] Among them, 1. Automobile upper arm; 10. Arm body; 11. Body; 111. Fixing hole; 112. First screw hole; 113. End threaded hole; 12. Bearing; 121. Mounting hole; 20. Connecting shaft; 21. Screw; 211. Rod head; 212. Rod body; 22. Upper shaft core; 221. First axial center hole; 2211. Upper sub-hole; 2212. Lower sub-hole; 222. First extension part; 223. First plug-in part; 23. Lower shaft core; 231. Second axial center hole; 232. Second plug-in part; 233. The second extension part; 234, the extension part; 2341, the first extension section; 2342, the third extension part; 2343, the second extension section; 24, the first nut; 25, the gasket; 30, the steering head; 31, the steering threaded rod; 32, the steering fixing sleeve; 33, the second nut; 34, the inner core; 341, the inner core hole; 342, the inner core fixing end; 343, the inner core connecting end; 35, the outer core; 351, the outer core hole; 352, the outer core fixing end; 353, the outer core connecting end; 40, the protective cover; 41, the second screw hole. DETAILED DESCRIPTION
[0030] It should be understood that the terms used herein, the specific structures and functional details disclosed are only for describing specific embodiments and are representative, but the present application can be implemented in many alternative forms and should not be construed as being limited to only the embodiments described herein.
[0031] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating relative importance or implicitly indicating the number of technical features indicated. Therefore, unless otherwise specified, features defined as "first" and "second" may explicitly or implicitly include one or more of the features; "plurality" means two or more. The term "including" and any variation thereof means non-exclusive inclusion, and one or more other features, integers, steps, operations, units, components and / or combinations thereof may exist or be added.
[0032] The present application is described in detail below with reference to the accompanying drawings and optional embodiments.
[0033] like Figure 1 and Figure 2 As shown, an embodiment of the present application provides an upper support arm 1 for a vehicle, which is an assembled structure, specifically including a support arm body 10, a connecting shaft 20 and two steering heads 30, and the connecting shaft 20 and the steering heads 30 are respectively assembled to the support arm body 10.
[0034] A mounting hole 121 is provided on the arm body 10, and the mounting hole 121 is a fisheye hole, which is a through hole structure, and the central axis direction of the mounting hole 121 is the same as the thickness direction of the arm body 10, that is, the mounting hole 121 penetrates the arm body 10 in the thickness direction of the arm body 10; the connecting shaft 20 is penetrated by the mounting hole 121 and is rotatably connected to the arm body 10, rotating around the central axis direction of the mounting hole 121, and is used to connect the arm body 10 to the frame of the car.
[0035] The two steering heads 30 are respectively connected to the two ends of the arm body 10, and are used to connect the arm body 10 to the axle of the car; wherein, the connecting shaft 20 rotates around a first axis, and the steering head 30 can rotate around a second axis, the first axis is the central axis of the mounting hole 121, and the second axis is perpendicular to the first axis.
[0036] Specific, combined Figure 3 and Figure 4 As shown, the arm body 10 includes a body 11 and a bearing 12. The body 11 is an integrated metal structure and is C-shaped. A fixing hole 111 is provided on the body 11. The fixing hole 111 is located at a corner of the body 11. The width m1 of the body 11 corresponding to the fixing hole 111 is greater than the width m2 of other areas. The thickness h1 of the body 11 corresponding to the fixing hole 111 is greater than the thickness h2 of other areas. The above design ensures the strength of the body 11 near the fixing hole 111.
[0037] The bearing 12 is disposed in the fixing hole 111 and connected to the body 11 by means of a clamp. The inner ring of the bearing 12 forms the mounting hole 121 , and the connecting shaft 20 is rotatably connected to the bearing 12 .
[0038] In the embodiment of the present application, the diameter of the mounting hole 121 is 1-2 inches, specifically 1.5 inches, which is almost double the diameter of the mounting hole of the ordinary upper arm, and the size of the connecting shaft 20 is also increased. In addition to increasing the overall strength of the upper arm 1 of the automobile, the connecting shaft 20 has a larger inclination angle and degree of deflection in the mounting hole 121, so that the upper arm 1 of the automobile has a better buffering effect and is less likely to have the problem of the connecting shaft 20 and the arm body 10 falling off.
[0039] Furthermore, the height of the bearing 12 is lower than the depth of the fixing hole 111 , so that after the connecting shaft 20 is matched with the bearing 12 , one end will not protrude too much.
[0040] Moreover, taking the planes where the two ends of the fixing hole 111 are located as the front and back sides of the main body 11, a plurality of groove patterns are respectively provided on the front and back sides of the main body 11 to reduce the weight of the main body 11; wherein, the groove pattern on the front side of the main body 11 may be symmetrical with the groove pattern on the back side of the main body 11, or may be asymmetrical, which is not limited here.
[0041] In addition, end threaded holes 113 are respectively provided at both ends of the body 11 , and the two steering heads 30 are respectively connected and fixed to the two ends of the body 11 by threaded connection.
[0042] The present application also provides a specific connecting shaft 20, such as Figure 5-Figure 8 As shown, the connecting shaft 20 is an axisymmetric structure, specifically including a screw 21, an upper shaft core 22, a lower shaft core 23 and a first nut 24, the screw 21 is inserted through the upper shaft core 22, the lower shaft core 23 and the first nut 24, the first nut 24 and the screw 21 are threadedly connected, and the screw 21, the upper shaft core 22 and the lower shaft core 23 are respectively an integral structure.
[0043] The screw rod 21 includes a rod head 211 and a rod shaft 212, wherein the rod head 211 is located at one end of the rod shaft 212, a portion of the rod shaft 212 away from the rod head 211 is provided with threads, and a portion of the rod shaft 212 close to the rod head 211 may not have threads, so as to reduce the friction between the upper shaft core 22, the lower shaft core 23 and the rod shaft 212, and facilitate the movement of the screw rod 21. The cross-sectional area of the rod head 211 is larger than the cross-sectional area of the rod shaft 212, and along the length direction of the rod shaft 212, the rod head 211, the upper shaft core 22, the lower shaft core 23 and the first nut 24 are distributed in sequence.
[0044] The length of the shaft 212 is greater than the height of the mounting hole 121, the upper shaft core 22 has a first shaft center hole 221, the lower shaft core 23 has a second shaft center hole 231, the shaft 212 is provided with the first shaft center hole 221 and the second shaft center hole 231, the upper shaft core 22 is sleeved on the shaft 212 through the first shaft center hole 221, and the lower shaft core 23 is sleeved on the shaft 212 through the second shaft center hole 231; the minimum cross-sectional area of the first shaft center hole 221 is smaller than the cross-sectional area of the rod head 211, that is, the rod head 211 cannot pass through the upper shaft core 22. The first nut 24 is threadedly connected to the shaft 212, the upper shaft core 22 and the lower shaft core 23 are located between the rod head 211 and the first nut 24, and the upper shaft core 22 is located between the lower shaft core 23 and the rod head 211.
[0045] Compared with the current scheme of using an integrated design for the screw and the upper shaft core, or connecting the screw and the upper shaft core by gluing, the present application designs the connecting shaft 20 as a structure composed of the screw 21, the upper shaft core 22, the lower shaft core 23 and the first nut 24. The screw 21 is not fixed to other parts. When the car is driven for a long time, causing the friction and heat of the connecting shaft 20, the screw 21 will not loosen or fall off from other structures, and it is not easy to cause safety hazards. Moreover, such a design also allows the screw 21, the upper shaft core 22 and the lower shaft core 23 to rotate and deflect after the upper arm 1 of the car is installed, so that the screw 21 has a certain activity space. When the road surface on which the car is driving is bumpy, the connecting shaft 20 can provide a greater buffering effect, making the car drive more stable.
[0046] Specifically, the upper shaft core 22 includes a first extension portion 222 and a first plug portion 223 connected to each other, the edge size of the first extension portion 222 is larger than the edge size of the first plug portion 223, and the first extension portion 222 and the first plug portion 223 are hollow inside to form the first axial center hole 221. The lower shaft core 23 includes a second plug portion 232, a second extension portion 233 and an extension portion 234 connected in sequence, the edge size of the second extension portion 233 is larger than the edge size of the second plug portion 232, the second plug portion 232, the second extension portion 233 and the extension portion 234 are hollow inside to form the second axial center hole 231, and the second plug portion 232 is arranged opposite to the first plug portion 223.
[0047] The first plug-in portion 223 and the second plug-in portion 232 are plugged into the mounting hole 121 from both sides, and the first plug-in portion 223 and the second plug-in portion 232 have the same outer diameter and are in contact with the inner wall of the mounting hole 121. The first plug-in portion 223 and the second plug-in portion 232 may or may not abut against each other in the mounting hole 121, which is not limited here, but the first extension portion 222 and the second extension portion 233 are respectively abutted against both sides of the bearing 12 to improve the stability of the upper shaft core 22, the lower shaft core 23 and the arm body 10.
[0048] In addition, the portion of the shaft 212 between the extension portion 234 and the first nut 24 forms a connection position for fixing with the bicycle frame, and the connection position can be adjusted by adjusting the position of the first nut 24 on the shaft 212 .
[0049] In the embodiment of the present application, the first extension part 222 and the second extension part 233 are both truncated cones or truncated cone-like structures. Specifically, the edge size of the first extension part 222 on the side close to the bearing 12 is larger than the edge size of the side of the first extension part away from the bearing 12, and the edge size of the second extension part 233 on the side close to the bearing 12 is larger than the edge size of the side of the second extension part away from the bearing 12. The side surfaces of the first extension part 222 and the second extension part 233 are both inclined surfaces or outwardly protruding arc surfaces. Through the above design, the upper shaft core 22, the lower shaft core 23 and the support arm body 10 (specifically the bearing 12) are more tightly engaged and more stable, avoiding the problem of the upper shaft core 22 and the lower shaft core 23 swinging in the mounting hole 121. Of course, in other embodiments, the first extension part 222 and the second extension part 233 can also be cylindrical structures or structures of other shapes.
[0050] In the embodiment of the present application, the extension portion 234 includes a first extension section 2341, a third extension section 2342 and a second extension section 2343 which are connected in sequence, the first extension section 2341 is connected to the second extension section 233, and the second plug-in portion 232, the second extension section 233, the first extension section 2341, the third extension section 2342 and the second extension section 2343 are hollow inside to form the second axial hole 231; the edge size of the third extension section 2342 is smaller than the edge size of the second extension section 233, and larger than the edge size of the first extension section 2341; the edge size of the first extension section 2341 is larger than the edge size of the second extension section 2343, and the edge size of the second extension section 2343 gradually decreases from the first extension section 2341 to the second extension section 2343.
[0051] Through the above design, the inherent strength of the lower shaft core 23 can be improved, while the connection area between the lower shaft core 23 and the shaft 212 is increased, thereby improving the stability between the lower shaft core 23 and the shaft 212 .
[0052] It should be noted that the “edge size” mentioned in the embodiments of the present application refers to the maximum size of the structure at the edge, which can be expressed as a diameter, side length, etc. For example, the “edge size of the first extension portion 222” refers to the outer diameter of the first extension portion 222 on the side close to the first plug portion 223, the “edge size of the first plug portion 223” refers to the outer diameter of the first plug portion 223, the “edge size of the second extension portion 233” refers to the outer diameter of the second extension portion 233 on the side close to the second plug portion 232, and the “edge size of the second plug portion 232” refers to the outer diameter of the second plug portion 232.
[0053] like Figure 6-Figure 8As shown, the connecting shaft 20 also includes a gasket 25, the center through hole size of the gasket 25 is larger than the cross-sectional area of the rod body 212, the rod body 212 is passed through the center through hole of the gasket 25, and the gasket 25 is sleeved on the rod body 212 and located between the first nut 24 and the second extension section 2343 to increase the contact area between the connecting shaft 20 and the frame of the automobile and improve the connection stability.
[0054] In the process of assembling the connecting shaft 20 to the support arm body 10, first insert the upper shaft core 22 into the screw rod 21, insert the screw rod 21 with the upper shaft core 22 into the mounting hole 121 from one side of the support arm body 10, then insert the lower shaft core 23 into the screw rod 21, pass the screw rod 21 through the corresponding hole position of the frame, and finally put the gasket 25 on the end of the screw rod 21, tighten it with the first nut 24 to complete the assembly.
[0055] Compared with the traditional upper support arm structure, the automobile upper support arm 1 provided in the embodiment of the present application has a larger mounting hole 121, a thicker screw 21, and is also equipped with a larger upper shaft core 22 and a lower shaft core 23, which greatly improves the strength of the upper support arm structure and makes the automobile upper support arm 1 not easily damaged when the automobile is in a complex terrain.
[0056] like Figure 8 As shown, the first axial hole 221 includes an upper sub-hole 2211 and a lower sub-hole 2212 which are connected, the central axes of the upper sub-hole 2211 and the lower sub-hole 2212 coincide with each other, the upper sub-hole 2211 is located on the side of the lower sub-hole 2212 away from the lower axis core 23, and the cross-sectional area of the upper sub-hole 2211 is larger than the cross-sectional area of the lower sub-hole 2212; the cross-sectional area of the upper sub-hole 2211 is larger than the cross-sectional area of the rod head 211, the cross-sectional area of the rod head 211 is larger than the cross-sectional area of the lower sub-hole 2212, the depth of the upper sub-hole 2211 is larger than the height of the rod head 211, and after the upper support arm 1 of the automobile is assembled, the rod head 211 is located in the upper sub-hole 2211 to prevent the rod head 211 from protruding out of the upper axis core 22 and affecting the overall aesthetics of the product.
[0057] like Fig. 9 and Fig.10As shown, the automobile upper arm 1 also includes a protective cover 40, which is arranged on a side of the body 11 close to the upper shaft core 22 and covers the bearing 12 and the connecting shaft 20, and the upper cover is connected to the body 11 by screws. Specifically, a plurality of first screw holes 112 are provided on a side of the body 11 away from the lower shaft core 23, and the plurality of screw holes are sequentially distributed around the fixing hole 111, and a plurality of second screw holes 41 are provided on the protective cover 40, and the second screw holes 41 are arranged one by one with the first screw holes 112, and the second screw holes 41 are connected to the first screw holes 112 by screws. Moreover, an annular groove is also provided on the side of the protective cover 40 facing the body 11, and an annular sealing ring is placed in the annular groove.
[0058] The above design can achieve the effect of preventing dust and dirt from entering the connecting shaft 20 , thereby preventing dust from entering the connecting shaft 20 and hindering the deflection and rotation of the screw 21 , thereby affecting the operation of the connecting shaft 20 and the upper arm 1 of the vehicle.
[0059] like Fig.11 and Fig.12 As shown, the steering head 30 includes a steering threaded rod 31, a steering fixing sleeve 32, a second nut 33, an inner core 34 and an outer core 35. End threaded holes 113 are provided at both ends of the support arm body 10. The steering threaded rod 31 and the steering fixing sleeve 32 are an integrated structure. The steering threaded rod 31 is inserted into the end threaded hole 113 and is threadedly connected to the support arm body 10. The steering fixing sleeve 32 is connected to the steering threaded rod 31. The second nut 33 is sleeved on the steering threaded rod 31 and is threadedly connected to the steering threaded rod 31.
[0060] The steering fixing sleeve 32 is provided with a sleeve hole, and the inner core 34 and the outer core 35 are respectively inserted into the sleeve hole from both sides of the steering fixing sleeve 32 to be connected with the steering fixing sleeve 32, and the inner hollow of the inner core 34 and the outer core 35 form a connection position for connecting with the axle of the automobile.
[0061] Specifically, the inner core 34 is an integral structure, including an inner core fixing end 342 and an inner core connecting end 343. The inner core fixing end 342 and the inner core connecting end 343 are hollow inside to form an inner core hole 341. The inner core fixing end 342 is inserted into the sleeve hole, and the outer wall of the inner core fixing end 342 is in contact with the hole wall of the sleeve hole. The inner core connecting end 343 is located outside the sleeve hole, and the cross-sectional area of the inner core connecting end 343 is larger than the cross-sectional area of the inner core fixing end 342. In addition, the cross-sectional area of the inner core connecting end 343 gradually decreases in the direction toward the inner core fixing end 342.
[0062] Similarly, the outer core 35 is also an integral structure, including an outer core fixing end 352 and an outer core connecting end 353. The inner hollow of the outer core fixing end 352 and the outer core connecting end 353 forms an outer core hole 351. The outer core fixing end 352 is inserted into the sleeve hole, opposite to the inner core fixing end 342, and the outer wall of the outer core fixing end 352 is in contact with the hole wall of the sleeve hole. The outer core connecting end 353 is located outside the sleeve hole, and the cross-sectional area of the outer core connecting end 353 is larger than the cross-sectional area of the outer core fixing end 352, and the cross-sectional area of the outer core connecting end 353 gradually decreases in the direction toward the outer core fixing end 352.
[0063] The length of the outer core connection end 353 is smaller than the length of the inner core connection end 343 , and the inner core hole 341 and the outer core hole 351 form a second connection position.
[0064] The embodiment of the present application further provides a car, which includes the above-mentioned car upper support arm 1, and the car upper support arm 1 is respectively connected to the frame and axle of the car.
[0065] The above content is a further detailed description of the present application in combination with specific optional implementation methods, and it cannot be determined that the specific implementation of the present application is limited to these descriptions. For ordinary technicians in the technical field to which the present application belongs, several simple deductions or substitutions can be made without departing from the concept of the present application, which should be deemed to fall within the scope of protection of the present application.
Claims
1. A connecting shaft of an upper support arm of an automobile, wherein the connecting shaft cooperates with a mounting hole of the upper support arm of the automobile, and is characterized in that: The connecting shaft comprises a screw rod, an upper shaft core, a lower shaft core and a first nut, the screw rod comprises a rod head and a rod body, the rod head is located at one end of the rod body, and the cross-sectional area of the rod head is greater than the cross-sectional area of the rod body; The upper shaft core has a first axial hole, the lower shaft core has a second axial hole, the shaft is provided with the first axial hole and the second axial hole, the minimum cross-sectional area of the first axial hole is smaller than the cross-sectional area of the shaft head; the first nut is threadedly connected to the shaft, the upper shaft core and the lower shaft core are located between the shaft head and the first nut, and the upper shaft core is located between the lower shaft core and the shaft head.
2. The connecting shaft of the upper support arm of the vehicle according to claim 1, characterized in that: The upper shaft core comprises a first extension portion and a first plug-in portion connected to each other, the edge size of the first extension portion is larger than the edge size of the first plug-in portion, and the first extension portion and the first plug-in portion are hollow inside to form the first shaft center hole; The lower shaft core comprises a second plug-in portion, a second extension portion and an extension portion connected in sequence, the edge size of the second extension portion is larger than the edge size of the second plug-in portion, the second plug-in portion, the second extension portion and the extension portion are hollow inside to form the second axial center hole, and the second plug-in portion is arranged opposite to the first plug-in portion; The first plug-in portion and the second plug-in portion are respectively plugged into the mounting hole from both sides of the mounting hole, and the first extension portion and the second extension portion are respectively abutted against both sides of the mounting hole.
3. The connecting shaft of the upper support arm of the vehicle as claimed in claim 2, characterized in that: The extension portion includes a first extension sub-portion, a third extension portion, and a second extension sub-portion which are connected in sequence, the first extension sub-portion is connected to the second extension portion, and the second plug-in portion, the second extension portion, the first extension sub-portion, the third extension portion, and the second extension sub-portion are hollow inside to form the second axial center hole; The edge size of the third extension portion is smaller than the edge size of the second extension portion, and larger than the edge size of the first extension portion; the edge size of the first extension portion is larger than the edge size of the second extension portion, and the edge size of the second extension portion gradually decreases from the first extension portion to the second extension portion.
4. The connecting shaft of the upper support arm of the vehicle as claimed in claim 2, characterized in that: The edge size of a side of the first extension portion close to the first plug-in portion is greater than the edge size of a side of the first extension portion away from the first plug-in portion, and the edge size of a side of the second extension portion close to the second plug-in portion is greater than the edge size of a side of the second extension portion away from the second plug-in portion.
5. The connecting shaft of the upper support arm of the vehicle as claimed in claim 2, characterized in that: The first axial hole includes an upper sub-hole and a lower sub-hole which are connected, the central axes of the upper sub-hole and the lower sub-hole coincide with each other, the upper sub-hole is located on a side of the lower sub-hole away from the lower axial core, and the cross-sectional area of the upper sub-hole is greater than the cross-sectional area of the lower sub-hole; The cross-sectional area of the upper sub-hole is greater than the cross-sectional area of the rod head, the cross-sectional area of the rod head is greater than the cross-sectional area of the lower sub-hole, and the depth of the upper sub-hole is greater than or equal to the height of the rod head.
6. The connecting shaft of the upper support arm of the vehicle as claimed in claim 1, characterized in that: The connecting shaft also includes a gasket, the rod is inserted into a central through hole of the gasket, and the gasket is located between the first nut and the lower shaft core.
7. An automobile upper support arm, characterized in that: It comprises an arm body and a connecting shaft of an automobile upper arm as described in any one of claims 1 to 6, wherein a mounting hole is provided on the arm body, the mounting hole is a through hole, and the central axis direction of the mounting hole is the same as the thickness direction of the arm body, the screw of the connecting shaft is passed through the mounting hole and is rotatably connected to the arm body; the upper shaft core and the lower shaft core are respectively abutted against two sides of the arm body.
8. The vehicle upper support arm according to claim 7, characterized in that: The arm body comprises a body and a bearing, the body is provided with a fixing hole, the bearing is arranged in the fixing hole and connected to the body, the inner ring of the bearing forms the mounting hole, the screw is rotatably connected to the bearing; the upper shaft core and the lower shaft core are respectively in contact with two sides of the bearing; The automobile upper support arm also includes a protective cover, which is connected to a side of the body close to the upper shaft core and covers the bearing and the connecting shaft.
9. The vehicle upper support arm according to claim 7, characterized in that: The vehicle upper support arm further comprises two steering heads, and the two steering heads are respectively connected to the two ends of the support arm body; The steering head comprises a steering threaded rod, a steering fixing sleeve, a second nut, an inner core and an outer core, end threaded holes are provided at both ends of the support arm body, the steering threaded rod is inserted into the end threaded holes and is threadedly connected to the support arm body, the steering fixing sleeve is connected to the steering threaded rod, and the second nut is sleeved on the steering threaded rod and is threadedly connected to the steering threaded rod; The steering fixing sleeve is provided with a sleeve hole, the inner core and the outer core are respectively inserted into the sleeve hole from both sides of the steering fixing sleeve and connected with the steering fixing sleeve, and the inner core and the outer core are hollow inside.
10. An automobile, characterized in that: The invention comprises an upper support arm for a vehicle as described in any one of claims 7 to 9.