CN215058728U

CN215058728U - Axial limiting structure for oil distribution shaft and revolving body of steel ball floating retainer ring type revolving joint

Info

Publication number: CN215058728U
Application number: CN202121459599.7U
Authority: CN
Inventors: 张雷; 谢胜林
Original assignee: Yulin Fushan Hydraulic Components Manufacturing Co ltd
Current assignee: Yulin Fushan Hydraulic Components Manufacturing Co ltd
Priority date: 2021-06-30
Filing date: 2021-06-30
Publication date: 2021-12-07
Anticipated expiration: 2031-06-30

Abstract

The utility model discloses an axial spacing structure of an oil distribution shaft and a revolving body of a steel ball floating retainer ring type revolving joint, which is characterized in that the oil distribution shaft, the revolving body and a floating retainer ring are provided with steel ball rolling groove which forms sliding friction contact with steel balls, and the revolving body is also provided with a steel ball mounting groove, a floating retainer ring sinking groove and a sealing ring sinking groove; the oil distribution shaft, the revolving body and the floating retainer ring are assembled, and then the steel ball raceway is formed, the steel ball is arranged in the steel ball raceway, the steel ball raceway grooves on the oil distribution shaft, the revolving body and the floating retainer ring are in sliding, rolling and friction contact with the steel ball, the steel ball is limited to slide and roll in the steel ball raceway, the floating retainer ring is assembled with the oil distribution shaft, the revolving body and the end cover in a clearance mode, and meanwhile, the sealing ring is tightly pressed in the sealing ring sinking groove on the revolving body by the end cover. The structure is simple, compact and reliable, the structure volume is relatively reduced, the processing is easy, the precision and quality control is easy, the assembly is simple, the assembly positioning is accurate, no additional tool clamp is needed, the friction force is small, the maintenance is simple, and the cost is reduced.

Description

Axial limiting structure for oil distribution shaft and revolving body of steel ball floating retainer ring type revolving joint

Technical Field

The utility model belongs to engineering machine tool swivel joint field, especially a retaining ring formula swivel joint oil distribution shaft and solid of revolution axial limit structure float of steel ball.

Background

At present, an axial limiting structure of an oil distribution shaft and a revolving body of an engineering mechanical revolving joint has a bearing form, a clamp spring form, a fixed retainer ring form and the like, the structural parts have high requirements on machining precision and assembly precision, when the axial limiting structure is applied to a large joint, the oil distribution shaft and the revolving body which support the limiting structure to form are relatively large and heavy under the constraints of machining conditions, performance requirements, assembly size and other factors, the axial limiting structure is not beneficial to machining and precision quality control, a corresponding tool clamp is generally required during assembly, later maintenance is difficult, and the cost is high. In addition, when the installation space of the swivel joint is limited and the internal oil passage is compactly arranged, the structure cannot be adjusted and adapted, and the design difficulty is easily caused.

Reference 1, application No.: CN201020215894, inventive name: the utility model provides an axial spacing connection structure and use connector of this structure, its connector includes the casing, the cover is equipped with connecting nut on the casing outer peripheral face, connecting nut passes through the spacing connection structure setting of axial on the casing, this spacing connection structure of axial includes the interior connecting ring groove that sets up on the outer connection annular that sets up on the connecting nut inner peripheral face and the casing outer peripheral face, it is interior, the cooperation intercommunication of outer connection annular forms annular connection space, wear to be equipped with the locking wire with the spacing setting of connecting nut axial on the casing in the annular connection space, the locking wire is buckled into the annular with annular connection space adaptation, the last locking wire that is provided with on the connecting nut and extends to annular connection space by its peripheral face penetrates the passageway. The structural characteristics of the comparison file and the scheme are different.

Disclosure of Invention

An object of the utility model is to provide a join in marriage the oil spindle, the last steel ball raceway groove assembly of processing forms the steel ball raceway on the solid of revolution and the unsteady fender circle, the steel ball is arranged in the steel ball raceway, join in marriage the oil spindle, the steel ball raceway groove of the solid of revolution and unsteady retaining ring forms the smooth friction contact with the steel ball, the contact surface leaves the fitting gap, unsteady retaining ring and join in marriage the oil spindle, solid of revolution and end cover are clearance assembly, the sealing washer is sticis in the sealing washer heavy inslot on the solid of revolution by the end cover simultaneously, form static seal, the accurate location when realizing joining in marriage oil spindle and solid of revolution assembly and the reliable axial of during operation are spacing. The axial limiting structure of the oil distribution shaft and the revolving body of the revolving joint has the advantages of simple structure, compactness, reliability, easiness in processing, precision quality control, simplicity in assembly, accuracy in assembly and positioning, reliability in limiting and convenience in maintenance.

The technical scheme adopted for achieving the purpose is as follows: an axial limiting structure of an oil distribution shaft and a revolving body of a steel ball floating retainer ring type revolving joint comprises an oil distribution shaft, a revolving body, a steel ball, a floating retainer ring, a sealing ring, an end cover, a bolt, a steel ball mounting groove, a floating retainer ring sinking groove, a sealing ring sinking groove and a steel ball raceway, wherein the upper steel ball raceway groove processed on the oil distribution shaft 1, the revolving body 2 and the floating retainer ring 4 forms a complete steel ball raceway d after being assembled, the steel ball 3 is arranged in the steel ball raceway d, the steel ball raceway grooves of the oil distribution shaft 1, the revolving body 2 and the floating retainer ring 4 form sliding and rolling friction contact with the steel ball 3, an assembly gap is reserved on a contact surface, the steel ball 3 is limited to slide and roll in the steel ball raceway d, the floating retainer ring 4 is limited in the floating retainer ring sinking groove b on the revolving body 2 by the end cover 6 fastened on the revolving body 2 by the bolt 7, the floating retainer ring 4 is assembled with the oil distribution shaft 1, the revolving body 2 and the end cover 6 in a gap, meanwhile, the sealing ring 5 is tightly pressed in the sealing ring sinking groove c on the revolving body 2 by the end cover 6 to form static sealing, so that accurate positioning during assembly of the oil distribution shaft 1 and the revolving body 2 and reliable axial limiting during working are realized.

Steel ball rolling grooves which form sliding, rolling and friction contact with the steel balls 3 are processed on the oil distribution shaft 1, the revolving body 2 and the floating retainer ring 4; the revolving body 2 is also provided with a floating retainer ring sinking groove b and a sealing ring sinking groove c.

A steel ball mounting groove a of the steel ball 3 is arranged at the steel ball rolling channel groove which is processed on the revolving body 2 and forms sliding, rolling and friction contact with the steel ball 3.

Compared with the prior art, the utility model, simple structure, it is compact reliable, the volume reduces relatively, easily processing and precision quality control, the assembly is simple and assembly positioning is accurate, need not extra frock clamp, and later maintenance is simple, cost reduction.

Description of the drawings:

fig. 1 is the utility model discloses a steel ball retaining ring formula rotary joint oil distribution shaft and solid of revolution axial limit structure's full section schematic view.

Fig. 2 is the utility model discloses a steel ball retaining ring formula rotary joint oil distribution shaft and solid of revolution axial limit structure's 3D axle survey structure schematic view.

Fig. 3 is the utility model relates to a steel ball retaining ring formula rotary joint oil distribution shaft floats and schematic diagram in steel ball mounting groove, the last retaining ring heavy groove that floats of solid of revolution on the solid of revolution of solid of revolution axial limit structure and the heavy groove of sealing washer.

Fig. 4 is the complete steel ball raceway schematic diagram formed after the assembly of the oil distribution shaft of the steel ball floating retainer ring type revolving joint and the oil distribution shaft of the revolving body axial limiting structure, the revolving body and the steel ball raceway groove processed on the floating retainer ring of the utility model.

Reference numerals: the oil distribution shaft comprises an oil distribution shaft 1, a revolving body 2, a steel ball 3, a floating retainer ring 4, a sealing ring 5, an end cover 6, a bolt 7, a steel ball mounting groove a, a floating retainer ring sinking groove b, a sealing ring sinking groove c and a steel ball raceway d.

Detailed Description

The invention will be further described with reference to the accompanying drawings:

example 1, the assembly process steps were:

step 1: pressing the oil distribution shaft 1 into the revolving body 2;

step 2: a certain amount of steel balls 3 are loaded into an 3/4 (incomplete) steel ball raceway d formed by the oil distribution shaft 1 and the revolving body 2 through a steel ball mounting groove a;

and step 3: the side of a steel ball raceway groove of a floating retainer ring 4 is attached to a steel ball 3, the retainer ring 4 is assembled with an oil distribution shaft 1 and a revolving body 2 to form a complete steel ball raceway d, the steel ball 3 is in sliding, rolling and friction contact with the steel ball raceway grooves processed on the oil distribution shaft 1, the revolving body 2 and the floating retainer ring 4, a reasonable assembly gap is reserved on a contact surface, and the steel ball 3 can only freely slide and roll in the steel ball raceway d;

and 4, step 4: placing the sealing ring 5 into a sealing ring sinking groove c on the revolving body 2;

and 5: an end cover 6 is fastened on the revolving body 2 by a bolt 7, a seal ring 5 is pressed in a seal ring groove c on the revolving body 2 by the end cover 6 to form reliable static seal, meanwhile, the end cover 6 limits a floating retainer ring 4 in a floating retainer ring sinking groove b on the revolving body 2, and the floating retainer ring 4 is assembled with the end cover 6, an oil distribution shaft 1 and the revolving body 2 in a clearance way;

step 6: and checking and finishing assembly.

Above assembling process is simple, need not extra frock clamp, and the positioning is accurate, and the precision is high, and the later maintenance is simple.

The following description of the limiting embodiments with reference to the drawings is as follows:

limiting embodiment 1: assuming that the overall installation direction of the swivel joint is from top to bottom as shown in fig. 2, the revolving body 2 is fixed, the oil distribution shaft 1 rotates and moves downwards, the steel ball raceway groove on the oil distribution shaft 1 is attached to the steel ball 3, the steel ball 3 is stressed downwards, the steel ball 3 and the oil distribution shaft 1 both move downwards, the maximum moving distance is the maximum installation set gap value, then the steel ball 3 is attached to the steel ball raceway groove on the revolving body 1, the revolving body 2 is fixed and stationary, at the moment, the steel ball 3 is supported by the revolving body 2, the oil distribution shaft 1 is supported by the steel ball 3, the downward movement of the oil distribution shaft is limited, and the rotation function of the oil distribution shaft 1 is not limited because the steel ball 3 can freely slide and roll in the steel ball raceway d; at the moment, the floating retainer ring 4 is in a floating state and is in contact with the steel ball 3 due to self weight; the oil distribution shaft 1 moves downwards relative to the revolving body 2 for limiting.

Limiting embodiment 2: assuming that the whole installation direction of the rotary joint is from top to bottom as shown in figure 2, the rotary body 2 is fixed, the oil distribution shaft 1 rotates and moves upwards, at the moment, the steel ball raceway groove on the oil distribution shaft 1 is attached to the steel ball 3, the steel ball 3 is forced upwards, the floating retainer ring 4, the steel ball 3 and the oil distribution shaft 1 move upwards under the stress, the maximum moving distance is the maximum clearance value set by installation, then the floating retainer ring 4 is contacted with the end cover 6, the end cover 6 is fastened on the revolving body 2 and is fixed and static, the floating retainer ring 4 is supported by the end cover 6, the steel ball 3 is supported by the floating retainer ring 4, the oil distribution shaft 1 is supported by the steel ball 3 to limit the upward movement, the rotation function of the oil distribution shaft 1 is not limited because the steel ball 3 can freely slide and roll in the steel ball raceway d, and the upward movement limit of the oil distribution shaft 1 relative to the revolving body 2 is realized.

Limiting embodiment 3: when the rotary joint normally works, the up-down moving direction of the oil distribution shaft 1 relative to the rotary body 2 is irregular, and the limiting implementation mode 1 and the limiting implementation mode 2 are irregularly and alternately arranged.

In the above embodiment 1, the floating retainer ring 4 is in a floating state and is in contact with the steel ball 3 only by its own weight, so that the generated friction force is negligible, and the steel ball 3 is in rolling sliding contact with the steel ball raceway groove on the oil distribution shaft 1 by force, so that the friction force is small and the rotational resistance of the oil distribution shaft is small.

In the above embodiment 2, the floating retainer ring 4 is forced to contact and abut against the end cover 6, the frictional resistance is large, the steel ball 3 slides and rolls in the steel ball raceway groove on the floating retainer ring 4, and the frictional resistance is small, so that the floating retainer ring 4 is stationary with respect to the end cover 6, that is, the floating retainer ring 4 is stationary, the steel ball 3 slides and rolls relative to the floating retainer ring 4, the steel ball 3 also rolls and slides in the steel ball raceway on the oil distribution shaft 1, the frictional force is small, and the rotational resistance of the oil distribution shaft is small as can be seen from the above.

Therefore, the utility model discloses a compare prior art, the rotation resistance of rotary joint normal during operation is little, and spacing reliable.

Claims

1. An axial limiting structure of an oil distribution shaft and a revolving body of a steel ball floating retainer ring type revolving joint comprises an oil distribution shaft, a revolving body, a steel ball, a floating retainer ring, a sealing ring, an end cover, a bolt, a steel ball mounting groove, a floating retainer ring sinking groove, a sealing ring sinking groove and a steel ball raceway, and is characterized in that the oil distribution shaft (1), the revolving body (2) and the floating retainer ring (4) are provided with upper steel ball raceway grooves which are assembled to form a steel ball raceway (d), the steel ball (3) is arranged in the steel ball raceway (d), the oil distribution shaft (1), the revolving body (2) and the steel ball raceway grooves of the floating retainer ring (4) are in sliding, rolling, friction and contact with the steel ball (3), the contact surface is provided with an assembly gap, the steel ball (3) is limited in the steel ball raceway (d) to slide, the floating retainer ring (4) is limited in a floating retainer ring sinking groove (b) on the revolving body (2) by an end cover (6) which is fastened on the revolving body (2) by a bolt (7), the floating retainer ring (4) is assembled with the oil distribution shaft (1), the revolving body (2) and the end cover (6) in a clearance mode, meanwhile, the sealing ring (5) is tightly pressed in the sealing ring sinking groove (c) on the revolving body (2) through the end cover (6) to form static sealing, and accurate positioning during assembly of the oil distribution shaft (1) and the revolving body (2) and reliable axial limiting during working are achieved.

2. The axial limiting structure of the oil distribution shaft and the revolving body of the steel ball floating retainer ring type revolving joint according to claim 1, characterized in that the oil distribution shaft (1), the revolving body (2) and the floating retainer ring (4) are provided with steel ball raceway grooves which form sliding, rolling and frictional contact with the steel balls (3); the revolving body (2) is also provided with a floating retainer ring sinking groove (b) and a sealing ring sinking groove (c).

3. The axial limiting structure of the oil distribution shaft and the revolving body of the steel ball floating retainer ring type revolving joint according to claim 1, characterized in that a steel ball mounting groove (a) of the steel ball (3) is arranged at a steel ball raceway groove which is processed on the revolving body (2) and forms sliding, rolling and friction contact with the steel ball (3).