CN216185430U - Steering transmission shaft assembly with four-groove through rolling way for commercial vehicle - Google Patents

Steering transmission shaft assembly with four-groove through rolling way for commercial vehicle Download PDF

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Publication number
CN216185430U
CN216185430U CN202121796686.1U CN202121796686U CN216185430U CN 216185430 U CN216185430 U CN 216185430U CN 202121796686 U CN202121796686 U CN 202121796686U CN 216185430 U CN216185430 U CN 216185430U
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China
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telescopic
joint fork
shaft
shaft assembly
sleeve
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CN202121796686.1U
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Chinese (zh)
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王义杰
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Sichuan Mianyang Dexin Machinery Co ltd
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Sichuan Mianyang Dexin Machinery Co ltd
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Abstract

The utility model provides a steering transmission shaft assembly of a four-groove through raceway of a commercial vehicle, which comprises a joint fork, a cross shaft assembly, a telescopic shaft, a telescopic sleeve, an axial retainer ring, a steel ball, a retainer, an elastic positioning sleeve, a dust ring and a sealing ring, wherein the joint fork is connected with the cross shaft assembly; the left side of a joint fork I is connected with a steering gear, the right side of the joint fork I is connected with a joint fork II through a cross shaft assembly I, the joint fork II is connected with a telescopic sleeve through welding, the telescopic shaft is connected with a joint fork III through a spline and a bolt, the joint fork III is connected with one side of a joint fork IV through the cross shaft assembly II, and the other side of the joint fork IV is connected with a steering shaft in a steering column. The utility model has the characteristics of small stretching force, small clearance, high rigidity, high strength, strong durability, high impact resistance and long service life of products.

Description

Steering transmission shaft assembly with four-groove through rolling way for commercial vehicle
Technical Field
The utility model belongs to the field of automobiles, and particularly relates to a steering transmission shaft assembly with four grooves and a through raceway for a commercial vehicle.
Background
The automobile steering transmission shaft assembly is an important safety component for transmitting the operating force and direction of a steering wheel to a steering gear so as to realize the steering of a vehicle. Meanwhile, the components are also the realization mechanism of the steering wheel position adjustment.
The position of a steering wheel of a common commercial vehicle needs to be adjusted; the cab needs to be turned over when the vehicle is maintained and repaired; the cab vibrates up and down while the vehicle is running. Three main reasons require a steering drive shaft assembly with a large extension range. The steering transmission shaft assembly is used for transmitting the operating force and the direction of a steering wheel to a steering gear; the impact of the sliding and stretching of the cab during the overturn requires that the cab has higher strength. The extension and retraction force of the steering transmission shaft assembly will make the steering wheel adjust the main force source of the force up and down. For the convenience of steering wheel adjustment, the telescopic force of the steering transmission shaft assembly is the main force source of the up-and-down adjusting force of the steering wheel. For the steering wheel to adjust lightly, the flexible power of steering drive shaft assembly requires for a short time. The steering transmission shaft assembly has a clearance when stretching and sliding, the clearance reaches a certain value and causes abnormal sound of the middle shaft part in the running process of the vehicle, and the clearance is required to be small usually for avoiding the abnormal sound. The clearance is small, and the telescopic sliding force of the steering transmission shaft assembly is large, so the clearance and the sliding force must be balanced on the middle shaft part.
The steering transmission shaft assembly is also a difficult point and a key point in the design and manufacture of the whole steering transmission device. The quality level of the steering gear is directly reflected to the performance and durability of the steering gear. The main problems of the existing industry are as follows: the steering transmission shaft assembly has large telescopic force and is easy to cause the shaking of a steering wheel; the large clearance of the steering transmission shaft assembly causes loose abnormal sound and poor durability.
As shown in FIG. 1, the left side of a yoke I101 is connected with a steering gear, the yoke I101 is connected with a yoke II 103 through a cross shaft assembly I102, the yoke II 103 is connected with a telescopic sleeve 105 through welding, and a telescopic shaft 104 is matched with the telescopic sleeve 105 through a steel ball pair 109. The telescopic shaft 104 and the yoke III 106 are connected with a bolt through a spline, the yoke III 106 and the yoke IV 107 are connected through a cross shaft assembly II 102, and the yoke IV 107 is connected with a steering shaft in a steering column.
The telescopic shaft 104 and the telescopic sleeve 105 are movable relative to each other by a steel ball pair, and the telescopic shaft 104 and the telescopic sleeve 105 can transmit a return force from a steering wheel or a steering system. The position adjustment of the steering wheel is ensured to meet the requirement of the extension of a steering transmission shaft when the cab is turned over; meanwhile, the steering requirement of the vehicle is ensured; has certain aligning capability with the vehicle.
Disadvantages of the first prior art
As shown in fig. 2 below: a) the telescopic shaft of the steering transmission shaft assembly is provided with an A-A double-groove track, 2 rows of 8 steel balls are arranged on the A-A track in the assembly, the B-B part in the vertical direction of the 2 rows of steel balls is the suspension direction of the telescopic shaft sleeve, and the radial clearance in the circumferential direction of a steering wheel is corresponding to easily generate abnormal sound;
the torque is transmitted in a point contact mode by 8 steel balls in the torque transmission process of the steering transmission shaft assembly, the steering transmission device has low torsional strength and poor torsional rigidity under two conditions of forced steering of a steering wheel and road surface impact, a telescopic shaft in contact with the steel balls and a track A-A of a telescopic sleeve easily generate pits, and the telescopic shaft and the telescopic sleeve slide in unbalanced mode in subsequent work of the assembly to generate shaking abnormal sound.
b) The local groove 1015 of the telescopic shaft, and the movement range of the steel ball is only between the two clamping ring grooves of the telescopic shaft. Under the amplitude of high frequency, the telescopic sleeve and the telescopic shaft are in a limited steel ball movement range, the abrasion is fast, and an intermediate shaft assembly easily generates an abraded gap, so that a steering system has abnormal sound, and the steering system is scrapped.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the defects in the prior art and provides a steering transmission shaft assembly with a four-groove through raceway for a commercial vehicle, which has the advantages of small telescopic force, small gap, high rigidity, high strength, strong durability, high impact resistance and long service life.
The utility model adopts the following technical scheme:
a steering transmission shaft assembly of a four-groove through raceway of a commercial vehicle comprises a joint fork, a cross shaft assembly, a telescopic shaft, a telescopic sleeve, an axial check ring, a steel ball, a retainer, an elastic positioning sleeve, a dustproof ring and a sealing ring.
The left side of a joint fork I is connected with a steering gear, the right side of the joint fork I is connected with a joint fork II through a cross shaft assembly I, the joint fork II is connected with a telescopic sleeve through welding, the telescopic shaft is connected with a joint fork III through a spline and a bolt, the joint fork III is connected with one side of a joint fork IV through the cross shaft assembly II, and the other side of the joint fork IV is connected with a steering shaft in a steering column.
The telescopic shaft is provided with a through groove, 4 through grooves in axial symmetry are formed in the shaft surface by taking the axis of the telescopic shaft as the axis, the telescopic shaft is provided with 1 axial retainer ring, the axial retainer ring is arranged at the left end part of the telescopic shaft, the steel ball is arranged in the through groove of the telescopic shaft, the telescopic shaft is arranged in the telescopic sleeve, 8 raceways in axial symmetry are formed in the inner wall of the telescopic sleeve matched with the telescopic sleeve by taking the axis as the axis, and 4 matched telescopic shafts can be selected randomly in the assembly of the telescopic shaft and the telescopic sleeve.
Each through groove is provided with 4 steel balls, and all the steel balls are arranged in the retainer. The steel balls are grouped at 0.02 mm.
The left side of the telescopic sleeve is provided with an elastic positioning sleeve and a dustproof ring, the end part of the left side of the telescopic sleeve is also provided with a sealing ring, the elastic positioning sleeve and the dustproof ring are fixed on the telescopic sleeve by the sealing ring, and lubricating grease is also arranged in the through groove of the telescopic shaft and the roller path of the telescopic sleeve.
The utility model has the beneficial effects that:
a) the telescopic shaft sleeve of the steering transmission shaft assembly is designed to be symmetrical with four-groove tracks with A-A, 4 rows of 16 steel balls are arranged on the tracks with A-A in the assembly, and the clearance of the telescopic shaft sleeve is controlled within a small range through 4 steel balls in the circumferential direction, so that the initial clearance is ensured to be low, and the steering wheel has no suspended direction.
The torque is transmitted in a point contact mode by the 16 steel balls in the torque transmission process of the steering transmission shaft assembly, the torsional strength of the steering transmission device is improved under two conditions of forced steering of a steering wheel and road surface impact, the torsional rigidity is high, a telescopic shaft in contact with the steel balls and a track A-A of a telescopic sleeve are not easy to generate pits, and the possibility that the telescopic shaft and the telescopic sleeve slide unstably and generate shaking abnormal sound in subsequent work of the assembly is eliminated.
b) The telescopic shaft sleeve is designed to be of a through groove structure, the movement of the steel ball group in the full stroke on the telescopic shaft is increased, the abrasion of the steel ball to the telescopic shaft is greatly reduced, and the service life of a product is prolonged.
Drawings
FIG. 1 is a schematic representation of a typical high end intermediate driveshaft section of a steering driveshaft assembly for a commercial vehicle of the background art;
FIG. 2 is a schematic structural view of an intermediate shaft assembly of a conventional steel ball type telescopic shaft sleeve;
FIG. 3 is a schematic sectional view taken along line A-A of FIG. 2;
FIG. 4 is a schematic structural view of the present invention;
FIG. 5 is a schematic view of the structure of the telescopic shaft of the present invention;
FIG. 6 is a cross-sectional view C-C of FIG. 5;
FIG. 7 is a schematic view of the structure of the telescopic sleeve of the present invention;
FIG. 8 is a cross-sectional view B-B of FIG. 7;
fig. 9 is a schematic structural diagram during assembly of the present invention.
In the figure: the universal joint comprises a 1-section fork I, a 2-cross shaft assembly I, a 3-section fork II, a 4-telescopic shaft, a 5-telescopic sleeve, a 6-section fork III, a 7-section fork IV, an 8-axial retainer ring, a 9-steel ball, a 10-retainer, an 11-elastic positioning sleeve, a 12-dustproof ring, a 13-sealing ring and a 14-cross shaft assembly II.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention are described below clearly and completely, and it is obvious that the described embodiments are some, not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The utility model utilizes 4 groups of 16 steel balls to do linear movement in the through groove 15 of the telescopic shaft 4, and the through groove 15 of the telescopic shaft 4 can drive the steel balls 9 to drive the roller path of the telescopic sleeve 5 to do torsional movement, thereby realizing the transmission of the steering wheel operating force.
As shown in fig. 4-8, the steering transmission shaft assembly with four grooves and through raceways for a commercial vehicle of the present invention includes a yoke, a cross axle assembly, a telescopic shaft 4, a telescopic sleeve 5, an axial retainer ring 8, a steel ball 9, a retainer 10, an elastic positioning sleeve 11, a dust ring 12, and a seal ring 13.
The left side of a joint fork I1 is connected with a steering gear, the right side of the joint fork I1 is connected with a joint fork II 3 through a cross shaft assembly I2, the joint fork II 3 is connected with a telescopic sleeve 5 through welding, a telescopic shaft 4 is connected with a joint fork III 6 through a spline and a bolt, the joint fork III 6 is connected with one side of a joint fork IV 7 through a cross shaft assembly II 14, and the other side of the joint fork IV 7 is connected with a steering shaft in a steering column.
The telescopic shaft 4 is provided with a through groove 15. The axis of the preferred telescopic shaft 4 is the axle center and 4 through grooves 15 of axial symmetry are opened on the axial plane, the telescopic shaft 4 has 1 axial retainer ring 8, the axial retainer ring 8 is installed at the left end of the telescopic shaft 4, the steel ball 9 is installed in the through groove 15 of the telescopic shaft 5, the telescopic shaft 4 is installed in the telescopic sleeve 5, 8 raceways of axial symmetry are opened on the inner wall of the telescopic sleeve 5 matched with the axial center, and 4 matched telescopic shafts can be selected arbitrarily in the assembly of the telescopic shaft 4 and the telescopic sleeve 5.
4 steel balls 9 are arranged in each through groove 15, all the steel balls 9 are arranged in the retainer 10, so that the steel balls 9 can rotate freely in the retainer 10 and do not fall off, and the retainer 10 drives the steel balls 9 to move axially on the telescopic shaft 4 at the right side of the axial retainer ring 8. The steel balls 9 are grouped by 0.02mm, (the design theoretical size of the steel balls 9 is S phi 7mm (S phi refers to the diameter of the steel balls, and the unit is mm), different groups of sizes of S phi 6.94mm, S phi 6.96mm, S phi 6.98mm and S phi 7.02mm can be adopted for grouping and assembling), the size of the steel balls 9 is subdivided, the gap of the telescopic sleeve 5 is controlled, the initial installation gap is small, and the service life of a product is prolonged; meanwhile, the assembly process is simple in design and high in efficiency (in the traditional assembly mode, the sizes of the channels of the telescopic sleeves and the raceways of the telescopic shafts are measured and grouped for grouped paired assembly, and when the telescopic force and the clearance are unqualified after the pairing, the sizes of the channels of the telescopic shafts are remachined for matching on the basis of the measurement of the sizes of the raceways of the telescopic sleeves.
An elastic positioning sleeve 11 and a dustproof ring 12 are arranged on the left side of the telescopic sleeve 5, a sealing ring 13 is further arranged at the end part of the left side of the telescopic sleeve 5, the elastic positioning sleeve 11 and the dustproof ring 12 are fixed on the telescopic sleeve 5 through the sealing ring 13, and lubricating grease is further arranged in a through groove 15 of the telescopic shaft 4 and a raceway of the telescopic sleeve 5 and used for ensuring lubrication of the steel ball 9 when the steel ball moves on the raceways of the telescopic sleeve 5 and the telescopic shaft 4.
Working mode
As shown in fig. 9, the holder 10 is assembled on the telescopic shaft 4 in advance, a theoretical steel ball group (S phi 7mm) is mounted on the holder 10, the telescopic shaft 4 with the holder 10 group is guided into the telescopic sleeve 5 (guided into the corresponding rolling groove through the steel ball 9), and the telescopic shaft 4 is pulled to detect the telescopic force under the condition that the telescopic sleeve 5 is fixed; the torsion telescopic shaft 4 detects a circumferential gap. When the telescopic force is large, the circumferential clearance is small; when the circumferential gap is large, the stretching force thereof will be small. To balance the requirements of small applied telescoping forces with small circumferential clearances. When the circumferential clearance is large, the steel balls 9(S phi 7mm) in the retainer 10 are replaced by steel balls 9 with a size increasing group (S phi 7.02mm), and the circumferential clearance is reduced; when the expansion/contraction force is large, the steel balls 9(S phi 7mm) in the cage 10 are replaced with steel balls 9 of a size-reduced group (S phi 6.98 mm).
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (4)

1. The commercial vehicle four-groove through raceway steering transmission shaft assembly comprises a joint fork, a cross shaft assembly, a telescopic shaft, a telescopic sleeve, an axial retainer ring, a steel ball, a retainer, an elastic positioning sleeve, a dustproof ring and a sealing ring;
the left side of a joint fork I is connected with a steering gear, the right side of the joint fork I is connected with a joint fork II through a cross shaft assembly I, the joint fork II is connected with a telescopic sleeve through welding, a telescopic shaft is connected with a joint fork III through a spline and a bolt, the joint fork III is connected with one side of a joint fork IV through the cross shaft assembly II, and the other side of the joint fork IV is connected with a steering shaft in a steering column;
an elastic positioning sleeve and a dustproof ring are arranged on the left side of the telescopic sleeve, a sealing ring is further arranged at the end part of the left side of the telescopic sleeve, and the elastic positioning sleeve and the dustproof ring are fixed on the telescopic sleeve by the sealing ring;
the telescopic shaft is characterized in that a through groove is formed in the telescopic shaft, 4 axially symmetric through grooves are formed in the shaft surface by taking the axis of the telescopic shaft as the axis, the telescopic shaft is provided with 1 axial retainer ring, the axial retainer ring is installed at the left end of the telescopic shaft, the steel ball is installed in the through groove of the telescopic shaft, the telescopic shaft is installed in the telescopic sleeve, 8 axially symmetric roller paths are formed in the inner wall of the telescopic sleeve matched with the telescopic shaft by taking the axis as the axis, and 4 matched telescopic shafts are selected randomly in the assembly of the telescopic shaft and the telescopic sleeve.
2. The commercial vehicle four-groove through-raceway steering transmission shaft assembly according to claim 1, wherein each through groove mounts 4 steel balls and all steel balls are mounted in a cage.
3. The steering transmission shaft assembly with four grooved channels for commercial vehicle of claim 2 wherein the steel balls are grouped by 0.02 mm.
4. The steering transmission shaft assembly with four grooves and through raceways for a commercial vehicle of claim 1, wherein grease is also provided in the grooves of the telescopic shaft and the raceways of the telescopic sleeve.
CN202121796686.1U 2021-08-03 2021-08-03 Steering transmission shaft assembly with four-groove through rolling way for commercial vehicle Active CN216185430U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202121796686.1U CN216185430U (en) 2021-08-03 2021-08-03 Steering transmission shaft assembly with four-groove through rolling way for commercial vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202121796686.1U CN216185430U (en) 2021-08-03 2021-08-03 Steering transmission shaft assembly with four-groove through rolling way for commercial vehicle

Publications (1)

Publication Number Publication Date
CN216185430U true CN216185430U (en) 2022-04-05

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ID=80895908

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202121796686.1U Active CN216185430U (en) 2021-08-03 2021-08-03 Steering transmission shaft assembly with four-groove through rolling way for commercial vehicle

Country Status (1)

Country Link
CN (1) CN216185430U (en)

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