A polyurethane ball stud assembly

Abstract

The utility model relates to a kind of polyurethane ball pin assembly, belong to ball pin assembly technical field.The polyurethane ball pin assembly includes: installation shell and ball pin;Protective mechanism, the protective mechanism includes the outer sleeve fixedly connected in the inner wall of installation shell, the inner wall of the outer sleeve is fixedly connected with anti-tear sleeve, the inner wall of the anti-tear sleeve is fixedly connected with inner sleeve, the surface lower end ball of the ball pin is hinged to the inner wall of inner sleeve;Through the inner sleeve of special polyurethane component has good self-lubricating characteristics, reduce the wear between the ball head of ball pin and inner sleeve, avoid frequent grease lubrication, and then guarantee the sealing effect between ball pin and inner sleeve, to reduce the wear between ball pin and inner sleeve, guarantee the service life of ball pin assembly, through the outer sleeve of special polyurethane component, inner sleeve and reinforcing rib, the impact force received by ball pin is dispersed, guarantee the stability and durability of installation shell dynamic performance, and then improve the service life of ball pin assembly.

Description

Technical Field

[0001] This utility model relates to the field of ball pin assembly technology, and in particular to a polyurethane ball pin assembly. Background Technology

[0002] The ball joint assembly is a core connecting component in the automotive chassis system. It is mainly used to transmit force and torque, while allowing multi-degree-of-freedom movement between components, such as in steering and suspension, to cope with dynamic conditions such as wheel bounce and steering deflection.

[0003] Metal ball joint assemblies are widely used in current automotive suspension and steering systems. These assemblies achieve multi-directional rotation through the cooperation of steel ball heads and ball seats. They require frequent grease lubrication to reduce friction.

[0004] Frequent grease lubrication can easily lead to sealing failure in metal ball pin assemblies, resulting in wear and affecting the service life of the ball pin assembly. Utility Model Content

[0005] Therefore, it is necessary to provide a polyurethane ball pin assembly to address the problem that frequent grease lubrication of metal ball pin assemblies can easily lead to sealing failure, resulting in wear and affecting the service life of the ball pin assembly.

[0006] The device includes: a mounting shell and a ball pin; a protective mechanism, the protective mechanism comprising an outer sleeve fixedly connected to the inner wall of the mounting shell, a tear-resistant sleeve fixedly connected to the inner wall of the outer sleeve, an inner sleeve fixedly connected to the inner wall of the tear-resistant sleeve, the lower end of the ball pin being ball-hinged to the inner wall of the inner sleeve, a protective sleeve at the top of the mounting shell, and equally spaced reinforcing ribs fixedly connected to the surface of the outer sleeve, the surfaces of the reinforcing ribs being fixedly connected to the inner wall of the mounting shell. The outer sleeve, inner sleeve, and reinforcing ribs are all made of special polyurethane components, and the tear-resistant sleeve is made of aramid fiber cloth. The inner sleeve, made of special polyurethane components, has good self-lubricating properties, reducing wear between the ball head of the ball pin and the inner sleeve, avoiding frequent grease injection, and thus ensuring a good seal between the ball pin and the inner sleeve, thereby reducing wear between the ball pin and the inner sleeve and ensuring the service life of the ball pin assembly. The outer sleeve, inner sleeve, and reinforcing ribs, made of special polyurethane components, disperse the impact force on the ball pin, ensuring the stability and durability of the dynamic performance of the mounting shell, and thus improving the service life of the ball pin assembly.

[0007] In one embodiment, the inner wall of the protective sleeve is threaded with annularly distributed screws, wherein the surface of one side of the screw is threaded to the inner wall of the mounting shell, and the surface of the other side of the screw is threaded to the inner wall of the ball pin.

[0008] In one embodiment, both the ball pin and the inner wall of the protective sleeve are engaged with annularly distributed soft plugs, the bottom end of which contacts the top end of the screw.

[0009] In one embodiment, both the ball pin and the inner wall of the protective sleeve are slidably connected to a locking rod, the surface of which engages with the inner wall of the soft plug. The locking rod and the soft plug cooperate to lock the screw, thereby ensuring the protective sleeve is stably installed at the opposite ends of the mounting shell and the ball pin. This guarantees the seal between the ball pin and the mounting shell, reduces wear between the ball head of the ball pin and the inner sleeve, and extends the service life of the ball pin assembly.

[0010] In one embodiment, the soft plug and the locking rod are both nitrile rubber components, and the screw is an alloy steel component.

[0011] In one embodiment, a nylon rope is fixedly connected to one end of both the soft plug and the locking rod. One end of the nylon rope on one side is fixedly connected to the surface of the protective sleeve, and the other end of the nylon rope on the other side is fixedly connected to the surface of the ball pin. The nylon rope restricts the placement of the soft plug and the locking rod, preventing the risk of loss.

[0012] In one embodiment, the mounting housing is an aluminum alloy component.

[0013] Beneficial effects

[0014] 1. The inner sleeve of the special polyurethane component has good self-lubricating properties, which reduces the wear between the ball head of the ball pin and the inner sleeve, avoids frequent grease injection, and thus ensures the sealing effect between the ball pin and the inner sleeve, thereby reducing the wear between the ball pin and the inner sleeve and ensuring the service life of the ball pin assembly. The outer sleeve, inner sleeve and reinforcing ribs of the special polyurethane component disperse the impact force on the ball pin, ensuring the stability and durability of the dynamic performance of the mounting shell, thereby improving the service life of the ball pin assembly.

[0015] 2. The locking mechanism, consisting of a locking lever and a soft plug, secures the screw, ensuring the protective sleeve is stably installed on the opposite ends of the mounting housing and the ball pin. This guarantees the seal between the ball pin and the mounting housing, reduces wear between the ball head and the inner sleeve, and extends the service life of the ball pin assembly. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the protective mechanism structure of this utility model;

[0019] Figure 3 This utility model Figure 2 Enlarged view of point A in the middle;

[0020] Figure 4 This utility model Figure 2 Enlarged view of point B in the middle.

[0021] Figure label:

[0022] 100. Mounting shell; 200. Ball pin; 300. Protective mechanism; 301. Outer shell; 302. Tear-resistant sleeve; 303. Inner sleeve; 304. Reinforcing rib; 305. Screw; 306. Soft plug; 307. Clamping rod; 308. Nylon rope; 309. Protective sleeve. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this specification are for illustrative purposes only and do not represent the only possible implementation.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0026] In this utility model, unless otherwise explicitly 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 and the second feature are in indirect contact 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 indicates 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 indicates that the first feature is at a lower horizontal level than the second feature.

[0027] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this specification belongs. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0028] The following is combined Figures 1-4 This invention describes the polyurethane ball pin assembly.

[0029] In one embodiment, a polyurethane ball pin assembly includes: a mounting housing 100 and a ball pin 200; a protective mechanism 300, the protective mechanism 300 including an outer sleeve 301 fixedly connected to the inner wall of the mounting housing 100, an anti-tear sleeve 302 fixedly connected to the inner wall of the outer sleeve 301, an inner sleeve 303 fixedly connected to the inner wall of the anti-tear sleeve 302, the lower end of the surface of the ball pin 200 being ball-hinged to the inner wall of the inner sleeve 303, a protective sleeve 309 provided at the top of the mounting housing 100, and reinforcing ribs 304 evenly distributed fixedly connected to the surface of the outer sleeve 301, the surface of the reinforcing ribs 304 being fixedly connected to the inner wall of the mounting housing 100, the outer sleeve 301, the inner sleeve 303 and the reinforcing ribs 304 being special polyurethane components, and the anti-tear sleeve 302 being an aramid fiber cloth component.

[0030] The ball pin 200 includes a hardened steel ball head (HRC58-62) and a precision-ground rod. The surface of the ball head is ultra-precision ground to Ra0.2μm and then mirror-polished after heat treatment. It forms a self-lubricating structure with the inner sleeve 303 of the special polyurethane component. The inner sleeve 303, outer sleeve 301, and reinforcing rib 304 are injection molded using graphene-modified polyurethane material. The inner sleeve 303 is a hemispherical structure that matches the ball head of the ball pin 200. The clearance between the ball head and the inner sleeve 303 is 0.05-0.1mm on one side. The protective sleeve 309 is a 304 stainless steel component. The top and bottom of the protective sleeve 309 are both fluororubber components.

[0031] Mounting housing 100 undergoes anodizing treatment to improve corrosion resistance.

[0032] The outer sleeve 301, inner sleeve 303, and reinforcing rib 304 of the special polyurethane component are made of Bayer Desmopan® 487 series material, containing 5% graphene reinforcement phase.

[0033] The ball head on the ball pin 200 achieves ±25° deflection within the inner sleeve 303. Due to the excellent self-lubricating properties of the inner sleeve 303 of the special polyurethane component, the friction coefficient is reduced to 0.08-0.12. Under alternating loads, the entropy elastic deformation of the polyurethane molecular chains absorbs impact energy. The reinforcing rib structure converts radial force into circumferential stress distribution.

[0034] After applying molybdenum disulfide grease to the ball head surface of ball pin 200, the ball head of ball pin 200 is installed into inner sleeve 303 using appropriate tools.

[0035] The inner sleeve 303 is made of Shore A70 soft vibration-absorbing layer, and the outer sleeve 301 is made of Shore A95 high rigidity load-bearing layer. The tear-resistant sleeve 302 of the aramid fiber cloth component improves the tear resistance of the outer sleeve 301 and the inner sleeve 303.

[0036] In this embodiment, a mounting base is welded to the surface of the mounting shell 100. The mounting shell 100 and the ball pin 200 are installed at the corresponding positions on the car suspension frame by means of bolts and nuts. When the ball pin 200 is turned, the ball head of the ball pin 200 swings in the inner sleeve 303. The ball head, after being coated with molybdenum disulfide grease, reduces the wear between it and the inner sleeve 303. The outer sleeve 301, inner sleeve 303 and reinforcing rib 304 of the special polyurethane component disperse the impact force transmitted by the ball pin 200.

[0037] like Figure 3 As shown, the inner wall of the protective sleeve 309 is threaded with annularly distributed screws 305. One side of the screws 305 is threaded to the inner wall of the mounting shell 100, and the other side of the screws 305 is threaded to the inner wall of the ball pin 200. Both the ball pin 200 and the inner wall of the protective sleeve 309 are engaged with annularly distributed soft plugs 306. The bottom end of the soft plug 306 contacts the top end of the screws 305. Both the ball pin 200 and the inner wall of the protective sleeve 309 are slidably connected with locking rods 307. The surface of the locking rods 307 is engaged with the inner wall of the soft plugs 306. One end of each soft plug 306 and locking rod 307 is fixedly connected with a nylon rope 308. One end of one nylon rope 308 is fixedly connected to the surface of the protective sleeve 309, and the other end of the nylon rope 308 is fixedly connected to the surface of the ball pin 200. The soft plugs 306 and locking rods 307 are both nitrile rubber components, the screws 305 are alloy steel components, and the mounting shell 100 is an aluminum alloy component.

[0038] In this embodiment, after the ball pin 200 is installed inside the inner sleeve 303, the protective sleeve 309 is fitted onto the surface of the ball pin 200, so that the bottom end of the protective sleeve 309 abuts against the top end of the mounting shell 100 and the top end of the protective sleeve 309 abuts against the end of the ball pin 200. An electric screwdriver is used to install the screw 305 inside the protective sleeve 309 and the mounting shell 100, thereby sealing the mounting shell 100 and the ball pin 200 with the protective sleeve 309.

[0039] Working principle: When the ball pin 200 is turning, the ball head of the ball pin 200 swings within the inner sleeve 303. The ball head, after being coated with molybdenum disulfide grease, reduces the wear between it and the inner sleeve 303. The outer sleeve 301, inner sleeve 303 and reinforcing rib 304 of the special polyurethane component disperse the impact force transmitted by the ball pin 200.

[0040] It should be noted that the mounting housing 100, ball pin 200, screw 305, soft plug 306 and locking lever 307 mentioned above are all components with relatively mature existing technology. The specific models can be selected according to actual needs, and will not be elaborated here.

[0041] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0042] The above-described embodiments are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A polyurethane ball pin assembly, characterized in that, include: Mounting housing (100) and ball pin (200); The protective mechanism (300) includes an outer sleeve (301) fixedly connected to the inner wall of the mounting shell (100), a tear-resistant sleeve (302) fixedly connected to the inner wall of the outer sleeve (301), an inner sleeve (303) fixedly connected to the inner wall of the tear-resistant sleeve (302), a ball pin (200) with its lower end ball-hinged to the inner wall of the inner sleeve (303), a protective sleeve (309) provided at the top of the mounting shell (100), and reinforcing ribs (304) evenly distributed fixedly connected to the surface of the outer sleeve (301). The surface of the reinforcing ribs (304) is fixedly connected to the inner wall of the mounting shell (100). The outer sleeve (301), the inner sleeve (303) and the reinforcing ribs (304) are all special polyurethane components, and the tear-resistant sleeve (302) is an aramid fiber cloth component.

2. The polyurethane ball pin assembly according to claim 1, characterized in that, The inner wall of the protective sleeve (309) is threaded with annularly distributed screws (305), one side of which the surface of the screw (305) is threaded to the inner wall of the mounting shell (100), and the other side of which the surface of the screw (305) is threaded to the inner wall of the ball pin (200).

3. The polyurethane ball pin assembly according to claim 2, characterized in that, Both the ball pin (200) and the inner wall of the protective sleeve (309) are fitted with annularly distributed soft plugs (306), and the bottom end of the soft plugs (306) contacts the top end of the screw (305).

4. The polyurethane ball pin assembly according to claim 3, characterized in that, Both the ball pin (200) and the inner wall of the protective sleeve (309) are slidably connected to a locking rod (307), and the surface of the locking rod (307) is engaged with the inner wall of the soft plug (306).

5. The polyurethane ball pin assembly according to claim 4, characterized in that, The soft plug (306) and the locking rod (307) are both nitrile rubber components, and the screw (305) is an alloy steel component.

6. The polyurethane ball pin assembly according to claim 4, characterized in that, One end of the soft plug (306) and the lever (307) are both fixedly connected to a nylon rope (308). One end of the nylon rope (308) on one side is fixedly connected to the surface of the protective sleeve (309), and the other end of the nylon rope (308) on the other side is fixedly connected to the surface of the ball pin (200).

7. The polyurethane ball pin assembly according to claim 1, characterized in that, The mounting housing (100) is an aluminum alloy component.

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