CN219888484U - Pull rod joint - Google Patents
Pull rod joint Download PDFInfo
- Publication number
- CN219888484U CN219888484U CN202320896274.8U CN202320896274U CN219888484U CN 219888484 U CN219888484 U CN 219888484U CN 202320896274 U CN202320896274 U CN 202320896274U CN 219888484 U CN219888484 U CN 219888484U
- Authority
- CN
- China
- Prior art keywords
- ball
- conical surface
- ball pin
- dust cover
- pin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000000428 dust Substances 0.000 claims abstract description 68
- 210000004907 gland Anatomy 0.000 claims description 21
- 229920001971 elastomer Polymers 0.000 claims description 19
- 239000004433 Thermoplastic polyurethane Substances 0.000 claims description 3
- 229920002803 thermoplastic polyurethane Polymers 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims 5
- 238000010168 coupling process Methods 0.000 claims 5
- 238000005859 coupling reaction Methods 0.000 claims 5
- 238000010276 construction Methods 0.000 claims 1
- 239000000806 elastomer Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 17
- 238000007789 sealing Methods 0.000 abstract description 16
- 239000012535 impurity Substances 0.000 abstract description 4
- 229910000831 Steel Inorganic materials 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000004519 grease Substances 0.000 description 3
- 238000010030 laminating Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Landscapes
- Pivots And Pivotal Connections (AREA)
- Sealing Devices (AREA)
Abstract
The utility model provides a pull rod joint, which relates to the technical field of automobile parts and adopts the following scheme: the anti-dust ball pin comprises a ball pin, wherein the ball pin is provided with a ball neck conical surface, a dust cover is sleeved on the ball pin, a round table-shaped inner sheath matched with the ball neck conical surface is arranged in the dust cover, and the inner sheath is attached to the ball neck conical surface. The brought effects are as follows: the two are in interference fit, the inner sheath tightly wraps the conical surface of the ball neck, so that impurities such as dust are difficult to enter and the dustproof sealing effect is improved due to large-area close fit between the conical surface of the ball neck and the dustproof cover.
Description
Technical Field
The utility model relates to the technical field of automobile parts, in particular to a pull rod joint.
Background
With the continuous development of commercial vehicle industry, the demand of the pull rod is continuously increased, and the pull rod joint is used as the most important mechanism of the pull rod, plays a role in transmitting motion in a steering system, and directly influences the stability of automobile operation, the running safety and the service life of tires.
In order to ensure the service life and safety of the joint assembly, the tightness of the joint is important to the joint assembly, so that the entry of external silt and rainwater in the running process of a vehicle is ensured, and the overflow of lubricating grease in the joint is prevented, so that the lubrication performance in the joint is influenced. In order to enhance the sealing performance, patent literature with publication number of CN207064459U and publication date of 2018 and 03 month and 02 day discloses a steering rod joint assembly with high sealing performance, which comprises a ball pin, a dust cover clamping ring, a joint, a ball seat, an end cover and a hexagonal slotted nut, wherein the ball pin consists of a ball body, a trapezoid table and a cone, the ball body is arranged at the lower part of the ball pin, the trapezoid table is in an inverted trapezoid shape, a cylindrical step is arranged between the large end of the trapezoid table and the large end of the cone at the lower part of the cone, the circular arc is transited between the cylindrical step and the cone, the upper end of the dust cover is arranged on the cone of the ball pin, the lower end of the dust cover is arranged on an annular boss at the upper end of the joint, and the clamping ring is arranged in a clamping groove at the lower end of the dust cover, so that the dust sealing effect is improved through the design of the structure of the dust cover.
However, because a larger gap is left between the middle part of the dust cover and the ball pin in the prior art, and the joint surface between the dust cover and the ball pin is small, dust is easy to enter the gap and accumulate in the gap, so that the dust-proof effect is slightly insufficient.
Disclosure of Invention
The utility model aims to provide and design a pull rod joint with strong dustproof sealing effect, aiming at the problems that the contact surface between a dustproof cover and a ball pin in the existing pull rod joint is small, and dust is easy to accumulate due to a large gap.
The technical scheme adopted by the utility model for solving the technical problems is as follows: the utility model provides a pull rod joint, includes the ball round pin, has ball neck conical surface on the ball round pin, and the cover is equipped with the dust cover on the ball round pin, is provided with the round platform form inner sheath with ball neck conical surface adaptation in the dust cover, and inner sheath and ball neck conical surface laminating, both interference fit, inner sheath tightly wrap up in ball neck conical surface for closely laminate in large tracts of land between ball neck conical surface and the dust cover, impurity such as dust is difficult to get into, promotes dustproof sealed effect.
Further, the dust cover is provided with an upper opening and a lower opening, a plurality of annular grooves are formed in the upper opening of the dust cover, and the upper opening is in contact fit with the ball pin through the annular grooves. The multi-channel annular groove is in line contact with the ball pin, plays a multi-channel sealing effect, continuously avoids entering of external dust, improves sealing effect, and has smaller friction force in a line contact mode, so that the ball pin rotates more flexibly.
Further, the dust cover is of an integrated thermoplastic polyurethane elastic rubber structure. Excellent wear-resisting and corrosion-resisting properties.
Further, the ball pin is sequentially provided with a threaded end, an upper conical surface, a spherical diameter conical surface and a ball head from top to bottom, and is respectively connected with different parts by arranging the ball pin into a plurality of sections of different structures.
Further, the novel ball head structure further comprises a ball head seat, the ball head of the ball pin is arranged in the ball head seat, a groove is formed in the ball head seat, the diameter of a lower opening of the dust cover is smaller than that of the groove of the ball head seat, the diameter of the lower opening is enlarged during assembly, the groove of the ball head seat is sleeved, and the diameter of the lower opening is automatically tightened and embedded into the groove of the ball head seat under the influence of rebound resilience performance of the dust cover. After the lower opening of the dust cover is embedded into the groove of the ball seat, the double-layer spiral retainer ring is fixed outside the lower opening, compared with the traditional clamp spring connection and spin riveting connection, the double-layer spiral retainer ring has smaller installation space, is continuous in shape and circumference, is fully contacted with the assembly part, and the whole retainer ring is uniform in circumferential stress, strong in axial strain resistance, reliable in limiting, convenient to assemble and disassemble and neat and attractive in shape.
Further, the wall thickness of the dust cover gradually becomes thinner along the direction from the upper opening to the lower opening; according to the actual swing of the ball pin, the position close to the ball head is greatly deformed, so that the ball pin can be ensured to receive smaller resistance in the swing process of the ball pin; the upper part of the thicker ball seat has enough strength, and can prevent the dust cover and the rocker arm from being damaged due to excessively quick friction caused by twisting of the ball pin after loading while maintaining the arc shape of the dust cover.
Further, the upper conical surface of the ball pin is sleeved with a conical surface sheath, the top of the dust cover is provided with an annular groove, and the bottom of the conical surface sheath is attached to the top of the dust cover. The annular groove line contact mode has smaller friction force and improves the sealing effect.
Further, a steel wire retainer ring is arranged outside the upper opening of the dust cover, so that the contact force between the upper opening of the dust cover and the ball pin is further enhanced, and the sealing effect is improved; the steel wire retainer ring is detachably arranged on the dust cover, and the change and replacement are more flexible.
Further, a hexagonal slotted nut is arranged at the threaded end of the ball pin; the bottom of the ball seat is connected with a gland, the gland is connected with the ball seat through spin riveting, and the edge of the ball seat is turned inwards to realize the sealing between the ball seat and the gland; a rubber gasket is arranged between the ball head and the gland, a plurality of pits are formed on the contact surface of the rubber gasket and the ball pin and used for storing lubricating oil or lubricating grease, and dust or impurities entering the steering joint can be stored. The thickness of the rubber gasket is larger than the distance between the ball pin and the gland, when the gland is riveted with the ball seat, the rubber gasket is forced to deform, rubber flows to a gap between the ball seat and the gland, no gap exists between the ball seat and the gland in the joint, and the sealing effect is improved.
From the above technical scheme, the utility model has the following advantages:
the utility model provides a pull rod joint, through set up the inner sheath in the dust cover, inner sheath and ball neck conical surface laminating, both interference fit, the inner sheath is tightly wrapped up in ball neck conical surface for extensive closely laminating between ball neck conical surface and the dust cover, impurity such as dust is difficult to get into, promotes dustproof seal effect.
Drawings
In order to more clearly illustrate the technical solutions of the present utility model, the drawings that are needed in the description will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of an embodiment of the present utility model.
Fig. 2 is a schematic diagram of a split state structure according to an embodiment of the present utility model.
Fig. 3 is a schematic structural view of a ball pin according to an embodiment of the present utility model.
Fig. 4 is a schematic structural view of a dust cap according to an embodiment of the present utility model.
In the figure, 1, a conical surface sheath, 2, a ball pin, 3, a steel wire retainer ring, 4, a double-layer spiral retainer ring, 5, a ball seat, 6, a rubber washer, 7, a hexagonal slotted nut, 8, a dust cover, 9, a gland, 201, a ball head, 202, a ball neck conical surface, 203, an upper conical surface, 204, a threaded end, 801, an upper opening, 802, a lower opening, 803 and an inner sheath.
Detailed Description
In order to make the objects, features and advantages of the present utility model more obvious and understandable, the technical solutions of the present utility model will be clearly and completely described below with reference to the drawings in this specific embodiment, and it is apparent that the embodiments described below are only some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, based on the embodiments in this patent, which would be within the purview of one of ordinary skill in the art without the particular effort to make the utility model are intended to be within the scope of the patent protection.
As shown in fig. 1 to 4, the present embodiment provides a pull rod joint, which comprises a conical surface sheath 1, a ball pin 2, a steel wire retainer ring 3, a double-layer spiral retainer ring 4, a ball seat 5, a rubber gasket 6, a hexagonal slotted nut 7, a dust cover 8 and a gland 9, wherein a hexagonal slotted nut 7 is assembled at a threaded end 204 of the ball pin 2; the ball head 201 of the ball pin 2 is positioned in the ball seat 5 and is contacted with the rubber gasket 6; the top of the dust cover 8 is contacted with the bottom of the conical surface sheath 1, the upper opening 801 of the dust cover 8 is attached to the upper conical surface 203 of the ball pin 2, the inner sheath 803 of the dust cover 8 is attached to the conical surface of the ball head 201, and the lower opening 802 of the dust cover 8 is embedded into the groove of the ball head seat 5; the steel wire retainer ring 3 is arranged outside the upper opening 801 of the dust cover 8; the double-layer spiral retainer ring 4 is arranged outside the lower opening 802 of the dust cover 8; the bottom of the ball seat 5 is connected with the gland 9 through spin riveting; the rubber gasket 6 is located between the ball head 201 and the gland 9.
Wherein, dust cover 8 is thermoplastic polyurethane elastic rubber structure as an organic whole, and dust cover 8 and ball seat 5 are connected and are connected adopting double-deck spiral retaining ring 4, and compare traditional jump ring connection and rivet soon and connect, double-deck spiral retaining ring 4 has less installation space, and the appearance is continuous circumference, and is abundant with the assembly part contact, and whole retaining ring is even along circumference atress, and anti axial ability is strong, spacing reliable, the dismouting of being convenient for, and the appearance is neat more pleasing to the eye. The top of the dust cover 8 and the upper opening 801 are annular grooves, the top of the dust cover 8 is matched with the bottom plane of the conical surface sheath 1, the upper opening 801 is matched with the ball pin 2, and the two are in line contact, so that a multi-channel sealing effect can be achieved, external dust is continuously prevented from entering, and the sealing effect is improved; the friction force of the line contact mode is smaller, and the ball pin 2 rotates more flexibly. The inside round platform form inner sheath 803 that possesses of dust cover 8, inner sheath 803 and ball cervical vertebra face 202 of ball round pin 2 are interference fit, can ensure that inner sheath 803 is wrapped up in tight ball round pin 2, further promotes the dustproof sealed effect. The wall thickness of the dust cover 8 gradually becomes thinner along the direction from the upper opening 801 to the lower opening 802, the deformation of the position close to the ball seat 5 is larger according to the actual swing of the ball pin 2, and the resistance of the ball pin 2 is smaller in the swing process of the ball pin 2; the upper part of the thicker ball seat 5 has enough strength, maintains the arc shape of the dust cover 8, and can prevent the dust cover 8 from being damaged due to the excessively quick friction between the ball pin 2 and the rocker arm after loading. The steel wire retainer ring 3 is fixed outside the upper opening 801 of the dust cover 8, so that the contact force between the upper opening 801 of the dust cover 8 and the ball pin 2 is further enhanced, and the sealing effect is improved; the steel wire retainer ring 3 is detachable, and the change and replacement are more flexible.
In addition, the rubber gasket 6 is matched with the head of the ball pin 2 and is responsible for stabilizing the head of the ball pin 2; the contact surface of the rubber washer 6 with the ball pin 2 has a plurality of pits for storing lubricating oil or grease, and dust or foreign matter entering the steering joint can be stored. The gland 9 and the ball seat 5 adopt a spin riveting process, the edge of the ball seat 5 turns inwards, and the sealing between the ball seat 5 and the gland 9 is realized; the thickness of the rubber gasket 6 is larger than the distance between the ball pin 2 and the gland 9, when the gland 9 is riveted with the ball seat 5, the rubber gasket 6 is forced to deform, rubber flows to a gap between the ball seat 5 and the gland 9, no gap exists between the ball seat 5 and the gland 9 in the joint, and the sealing effect is improved.
The terms "upper," "lower," "outboard," "inboard," and the like in the description and in the claims of the utility model and in the above figures, if any, are used for distinguishing between relative relationships in position and not necessarily for giving qualitative sense. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the utility model described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (6)
1. The pull rod joint comprises a ball pin, wherein the ball pin is provided with a ball neck conical surface, and a dust cover is sleeved on the ball pin; the ball pin is sequentially provided with a threaded end, an upper conical surface, a spherical diameter conical surface and a ball head from top to bottom; the upper conical surface of the ball pin is sleeved with a conical surface sheath, the top of the dust cover is provided with an annular groove, and the bottom of the conical surface sheath is attached to the top of the dust cover; the hexagonal slotted nut is arranged at the threaded end of the ball pin; the bottom of the ball seat is connected with a gland, the gland is connected with the ball seat through spin riveting, a rubber gasket is arranged between the ball and the gland, and a contact surface of the rubber gasket and the ball pin is provided with a plurality of pits.
2. The tie-bar coupling of claim 1, wherein the dust cap has an upper opening and a lower opening, the upper opening of the dust cap having a plurality of annular grooves, the upper opening being in contact with the ball pin through the annular grooves.
3. The tie-bar coupling of claim 2 wherein the dust cap is of unitary thermoplastic polyurethane elastomer construction.
4. A tie rod coupling as claimed in claim 3 further comprising a ball seat, the ball head of the ball pin being mounted within the ball seat, the ball seat being provided with a recess, the lower opening of the dust cap being embedded within the recess of the ball seat, the lower opening of the dust cap being externally provided with a double-layered helical retainer ring.
5. The tie-bar coupling of claim 1, wherein the dust cap has a wall thickness that tapers in a direction from the upper opening to the lower opening.
6. A tie-bar coupling according to claim 3, wherein the dust cap is provided with a wire retainer ring externally of the upper opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320896274.8U CN219888484U (en) | 2023-04-20 | 2023-04-20 | Pull rod joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320896274.8U CN219888484U (en) | 2023-04-20 | 2023-04-20 | Pull rod joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219888484U true CN219888484U (en) | 2023-10-24 |
Family
ID=88399860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320896274.8U Active CN219888484U (en) | 2023-04-20 | 2023-04-20 | Pull rod joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219888484U (en) |
-
2023
- 2023-04-20 CN CN202320896274.8U patent/CN219888484U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |