Universal joint assembly with lengthened dustproof frame slope

Abstract

The utility model relates to the technical field of universal joint assemblies, in particular to a universal joint assembly with a lengthened dustproof frame slope, which comprises a cross shaft body and is characterized in that four shaft heads are arranged on the cross shaft body, oil seal seats are sleeved at the end parts of the shaft heads, lengthened shaft sleeves are sleeved outside the shaft heads, and the lengthened shaft sleeves are sleeved outside the shaft heads. The axial length L of the lengthened shaft sleeve is 1.2 times to 1.5 times of the standard axial length L of a conventional shaft sleeve, the value range of the L is 30 mm-50 mm, a bearing assembly is arranged on the inner wall of the lengthened shaft sleeve and matched with the end of the shaft head, the sealing space is increased through the lengthened shaft sleeve, and the dustproof and leakage-proof capacity is improved through cooperation of the labyrinth sealing ring and the two-way embedded assembly; the bearing assembly adopts a plurality of cylindrical roller bearings to realize uniform load distribution; lubricating grease distribution is optimized through an oil seal seat lubricating grease backflow groove; the cross shaft main body is subjected to special heat treatment, has both surface hardness and internal toughness, adapts to high-load complex working conditions, improves the operation stability and prolongs the service life.

Description

TECHNICAL FIELD

[0001] The utility model relates to a universal joint assembly technical field, especially a universal joint assembly with lengthened dustproof frame slope. BACKGROUND

[0002] In modern mechanical transmission systems, universal joints are widely used in the fields of automobiles, engineering machinery, industrial equipment, etc. as key components for connecting two shafts and realizing angle change power transmission. Traditional universal joints are usually composed of a cross shaft, a shaft sleeve, bearings and a sealing structure, and the design goal is to achieve smooth power transmission and effective dustproof lubrication. However, with the development of mechanical equipment towards high load, high speed operation and complex working conditions, traditional universal joints gradually reveal deficiencies in sealing performance, lubrication effect and structural stability. Especially in harsh environments such as dusty, humid or high temperature, the sealing structure of traditional universal joints often fails to effectively block the entry of external pollutants, leading to contamination of the lubrication system, accelerated bearing wear, and thus affecting transmission efficiency and service life. In addition, the layout of the lubrication channel in the traditional design is not reasonable, and the uneven distribution of lubricating grease also easily leads to local dry friction and abnormal wear, reducing overall reliability.

[0003] A reinforced universal joint assembly (publication number: CN 204572837 U) is disclosed in a Chinese patent, which includes a cross shaft body, the cross shaft body is provided with a shaft head integrated with the cross shaft body in the cross direction, the shaft head is provided with a shaft sleeve, the inner wall of the side end face of the shaft sleeve is provided with an end face inner groove, the outer wall of the side end face of the shaft sleeve is provided with an end face outer groove, the shaft sleeve and the shaft head are connected through evenly distributed needle rollers, a pad groove is arranged between the shaft sleeve and the needle roller, a sliding block is arranged at the left end of the needle roller, and an oil seal is arranged at the opening of the shaft sleeve and the connection of the shaft head. However, this universal joint assembly has deficiencies in sealing performance, lubrication uniformity and structural strength, and cannot meet the long-term stable operation requirements under high load and complex working conditions, so a universal joint assembly with lengthened dustproof frame slope is needed. UTILITY MODEL CONTENTS

[0004] The utility model aims at solving the deficiencies of traditional universal joints in sealing performance, lubrication uniformity and structural strength, and the long-term stable operation requirements under high load and complex working conditions, and proposes a universal joint assembly with lengthened dustproof frame slope.

[0005] The utility model solves its technical problem adopts the technical scheme: A kind of universal joint assembly with lengthening dustproof frame slope of the utility model, including cross shaft body, it is characterized by: four axle heads are equipped on the cross shaft body, oil seal seat is sleeved at axle head end, lengthening sleeve is sleeved at the outside of axle head, the axial length L of lengthening sleeve is 1.2 times to 1.5 times of the standard axial length L0 of conventional sleeve, wherein the value range of L0 is 30mm~50mm, bearing assembly is equipped in the inner wall of lengthening sleeve and is matched with axle head end, radial oil channel and annular oil injection nozzle associated with radial oil channel are jointly equipped in lengthening sleeve and axle head end, radial oil channel and annular oil injection nozzle are concentrically arranged, lengthening sleeve end is equipped with labyrinth seal ring and the connecting place is equipped with bidirectional embedding component.The structure is integrated by lengthening sleeve, labyrinth seal ring and bidirectional embedding component, constructs integrated, high-sealing universal joint assembly structure, effectively prevent external pollutants from entering internal lubrication system, ensure the stability and precision of lubrication channel simultaneously, improve the reliability and durability of overall operation.

[0006] Preferably, the labyrinth seal ring includes a ring body and a spiral spring disposed at the center of the ring body. The labyrinth seal ring adopts a structure design combining a ring body and a spiral spring, enhancing the resilience and self-adaptability of the seal ring, so that it can still maintain good sealing performance in a dynamic working environment, effectively blocking dust and pollutants, and improving the dustproof effect.

[0007] Preferably, the bidirectional embedding component includes a plurality of clamping blocks disposed at the end of the sleeve and a plurality of clamping grooves disposed at the corresponding position of the oil seal seat, and the clamping blocks are matched with the clamping grooves. Through the embedded matching design of the clamping blocks and the clamping grooves, the firm connection and precise positioning between the sleeve and the oil seal seat are realized, preventing relative displacement or loosening of the two, and enhancing the stability and assembly consistency of the overall structure.

[0008] Preferably, the bearing assembly includes a retainer, and a plurality of cylindrical roller bearings are disposed on the retainer in an equidistant array. The structure of a plurality of cylindrical roller bearings supported by the retainer provides uniform load distribution and smooth rotation performance, making the universal joint more stable during operation, reducing local wear, and improving service life.

[0009] Preferably, the outer wall of the oil seal seat is provided with a plurality of grease return grooves arranged in an equidistant array. The grease return grooves provided on the outer wall of the oil seal seat help to achieve uniform distribution and effective return of the grease during movement, avoid accumulation or loss of the grease, improve the lubrication effect, and ensure the continuous lubrication state of the internal components.

[0010] Preferably, the cross shaft body is made of medium carbon alloy steel with a surface hardness of HRC58~63, a core hardness of HRC32~38, and a surface hardened layer depth of 0.8~1.2mm. The cross shaft body, made of specific materials and undergoing specific heat treatment processes, possesses high surface hardness and wear resistance while maintaining good internal toughness and impact resistance, thus ensuring structural integrity and stable performance even under complex working conditions.

[0011] The advantages of this utility model are:

[0012] The universal joint assembly of the extended dustproof rack ramp in this application achieves more reliable operation and a longer service life under complex working conditions through innovative structural design. The extended bushing effectively increases the internal sealing space, and together with the labyrinth seal ring and bidirectional embedded components, significantly improves dustproof and leakage prevention capabilities, enabling the lubrication system to remain clean and efficient in harsh environments. The bearing assembly adopts a cage-supported multi-cylinder roller bearing structure, achieving uniform load distribution and smooth rotation, reducing local wear, and improving overall load-bearing capacity and smooth operation. The grease return groove on the outer wall of the oil seal seat optimizes the grease distribution path, ensuring that the grease continuously covers key friction surfaces during operation, avoiding dry friction and abnormal wear. In addition, the cross shaft body uses specific materials and heat treatment processes, giving it high surface hardness and wear resistance while maintaining good internal toughness and impact resistance, thus maintaining structural integrity and operational stability under high load and frequent turning conditions. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of 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 only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the exploded structure of this utility model.

[0015] Figure 2 This utility model Figure 1 Enlarged view of I in the middle.

[0016] Figure 3 This utility model Figure 1 Enlarged view of section II.

[0017] Figure 4 This is a schematic diagram of the overall structure of this utility model.

[0018] In the figure: 1, lengthened shaft sleeve; 2, cross shaft body; 3, oil seal seat; 4, shaft head; 5, radial oil passage; 6, labyrinth seal ring; 7, annular oil injection nozzle; 8, cylindrical roller bearing; 9, retainer; 10, grease backflow groove; 11, clamping groove; 12, clamping block; 13, ring body; 14, helical spring. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model. EMBODIMENT

[0020] Please refer to Figures 1-4 As shown in the figure, a universal joint assembly with lengthened dustproof frame slope, including cross shaft body 2, characterized by: the cross shaft body 2 is provided with four shaft heads 4, the shaft head 4 end is sleeved with an oil seal seat 3, the shaft head 4 is externally sleeved with a lengthened shaft sleeve 1, the lengthened shaft sleeve 1 axial length L is 1.2 to 1.5 times of the standard axial length L0 of the conventional shaft sleeve, wherein the value range of L0 is 30mm~50mm, the lengthened shaft sleeve 1 inner wall is provided with a bearing assembly and matched with the shaft head 4 end, the lengthened shaft sleeve 1 and the shaft head 4 end are internally provided with a radial oil passage 5 and an annular oil injection nozzle 7 associated with the radial oil passage 5, the radial oil passage 5 and the annular oil injection nozzle 7 are concentrically arranged, the lengthened shaft sleeve 1 end is provided with a labyrinth seal ring 6 and the connecting part is provided with a bidirectional embedding assembly. The structure integrates the lengthened shaft sleeve 1, the labyrinth seal ring 6 and the bidirectional embedding assembly, constructs an integrated and high-sealing universal joint assembly structure, effectively prevents external pollutants from entering the internal lubricating system, ensures the stability and precision of the lubricating passage, and improves the reliability and durability of the overall operation.

[0021] In the embodiment, the labyrinth seal ring 6 includes a ring body 13 and a helical spring 14 arranged at the center of the ring body 13. The labyrinth seal ring 6 adopts the structural design of the combination of the ring body 13 and the helical spring 14, enhances the resilience and self-adaptability of the seal ring, makes it still maintain good sealing performance in the dynamic working environment, effectively blocks dust and pollutants, and improves the dustproof effect.

[0022] In this embodiment, the bidirectional embedding assembly includes a plurality of clamping blocks 12 arranged at the end of the shaft sleeve and a plurality of clamping grooves 11 arranged at the corresponding position of the oil seal seat 3, and the clamping blocks 12 are matched with the clamping grooves 11. Through the embedded matching design of the clamping blocks 12 and the clamping grooves 11, the firm connection and accurate positioning between the shaft sleeve and the oil seal seat 3 are realized, the relative displacement or loosening of the two is prevented, and the stability and assembly consistency of the overall structure are enhanced.

[0023] In this embodiment, the bearing assembly includes a retainer 9, and a plurality of cylindrical roller bearings 8 are arranged on the retainer 9 in an equidistant array. The structure of the plurality of cylindrical roller bearings 8 supported by the retainer 9 provides uniform load distribution and smooth rotation performance, so that the universal joint is more stable during operation, reduces local wear, and prolongs the service life.

[0024] In this embodiment, the outer wall of the oil seal seat 3 is provided with a plurality of grease return grooves 10 arranged in an equidistant array. The grease return grooves 10 arranged on the outer wall of the oil seal seat 3 help to achieve uniform distribution and effective return of the grease during movement, avoid accumulation or loss of the grease, improve the lubrication effect, and ensure the continuous lubrication state of the internal components.

[0025] In this embodiment, the cross shaft body is made of medium-carbon alloy steel, the surface hardness is HRC58~63, the core hardness is HRC32~38, and the surface hardening layer depth is 0.8~1.2mm. The cross shaft body made of specific material and heat treatment process has high surface hardness and wear resistance, and maintains good toughness and impact resistance inside, so that the structure is still complete and stable under complex working conditions.

[0026] The implementation principle of this embodiment is:

[0027] First, when power is transmitted from one shaft to another, due to the existence of a certain angle between the two shafts, the cross shaft body 2 as the core transmission component is connected with the corresponding shafts through the four shaft heads 4 respectively, realizing multi-directional transmission of power. In this process, the lengthened shaft sleeve 1 externally sleeved on the shaft head 4 not only increases the internal space, but also provides a more stable installation foundation for the bearing assembly, so that the load can be uniformly distributed to the plurality of cylindrical roller bearings 8 through the retainer 9, thereby realizing stable and efficient rotation. The lengthened shaft sleeve 1 extends the coverage range away from the center of the cross shaft body 2 by extending the axial dimension, so as to increase the dustproof area.

[0028] In order to ensure that the internal lubrication system is not contaminated by the outside during operation, the labyrinth seal ring 6 is arranged at the end of the shaft sleeve, and the ring body 13 and the center spiral spring 14 structure can maintain good sealing performance under dynamic conditions, effectively blocking dust, moisture and other external pollutants from entering the internal lubrication area. At the same time, the bidirectional embedded assembly is embedded with the clamping block 12 and the clamping groove 11, and the shaft sleeve and the oil seal seat 3 are firmly connected together to prevent relative displacement or loosening between the two, further improving the stability and sealing effect of the overall structure.

[0029] In terms of lubrication, the concentric and coaxial design of the radial oil channel 5 and the annular oil injection nozzle 7 allows the lubricating grease to be accurately injected into the key friction parts, and the multiple lubricating grease return grooves 10 arranged on the outer wall of the oil seal seat 3 help the lubricating grease to be evenly distributed and effectively returned during movement, avoiding the accumulation or loss of lubricating grease in local areas, ensuring that each friction surface is always in good lubrication state, reducing wear and heat accumulation.

[0030] In the description of the present specification, the description of the terms "one embodiment", "example", "specific example" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0031] The basic principles, main features and advantages of the present application have been shown and described. It should be understood by those skilled in the art that the present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application.

Claims

1. A universal joint assembly with an extended dustproof rack ramp, comprising a cross shaft body (2), characterized in that... The cross shaft body (2) is provided with four shaft heads (4). The ends of the shaft heads (4) are fitted with oil seal seats (3). The shaft heads (4) are fitted with extended bushings (1). The axial length L of the extended bushings (1) is 1.2 to 1.5 times the standard axial length L0 of the conventional bushings. The value of L0 is 30mm to 50mm. The inner wall of the extended bushings (1) is provided with a bearing assembly that cooperates with the ends of the shaft heads (4). The extended bushings (1) and the ends of the shaft heads (4) are provided with a radial oil passage (5) and an annular oil nozzle (7) associated with the radial oil passage (5). The radial oil passage (5) and the annular oil nozzle (7) are arranged concentrically and coaxially. The ends of the extended bushings (1) are provided with a labyrinth seal ring (6) and a bidirectional embedding assembly is provided at the connection.

2. The universal joint assembly with an extended dustproof frame ramp according to claim 1, characterized in that: The labyrinth sealing ring (6) includes a ring body (13) and a helical spring (14) located at the center of the ring body (13).

3. The universal joint assembly with an extended dustproof frame ramp according to claim 1, characterized in that: The bidirectional embedding assembly includes multiple locking blocks (12) located at the end of the bushing and multiple locking slots (11) located at positions corresponding to the oil seal seat (3), wherein the locking blocks (12) and the locking slots (11) cooperate with each other.

4. The universal joint assembly with an extended dustproof frame ramp according to claim 1, characterized in that: The bearing assembly includes a cage (9) on which cylindrical roller bearings (8) are provided. The number of cylindrical roller bearings (8) is 20 to 30 and they are arranged in an equally spaced array.

5. A universal joint assembly with an extended dustproof frame ramp according to claim 1, characterized in that: The outer wall of the oil seal seat (3) is provided with several grease return grooves (10) arranged in an equally spaced array.

6. A universal joint assembly with an extended dustproof frame ramp according to claim 1, characterized in that: The cross shaft body is made of medium carbon alloy steel with a surface hardness of HRC58~63, a core hardness of HRC32~38, and a surface hardened layer depth of 0.8~1.2mm.

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