阅读说明：本技术 一种挖掘机转动用液压旋转接头 (Hydraulic rotary joint for rotation of excavator ) 是由 付贤安 于 2020-06-04 设计创作，主要内容包括：本发明涉及旋转接头技术领域,且公开了一种挖掘机转动用液压旋转接头,包括固定壳体,固定壳体的内圈活动套接有旋转芯轴,旋转芯轴顶部的中部开设有进油口,旋转芯轴内部位于通孔的外圈呈环状开设有液压孔,固定壳体内部位于进油口底部的位置开设有环形槽,环形槽与液压孔连通,所述固定壳体内部位于环形槽一侧的位置活动套接有稳固套环,所述固定壳体内部位于稳固套环一侧的位置固定安装有报警器,所述稳固套环的中部开设有贯穿的伸缩滑孔,通过设置有稳固套环和在固定壳体内设置有报警器,且在稳固套环中套接有液压调节头配合开关触动顶杆和限位滑块,可以有效地保护旋转芯轴不偏移和控制旋转接头安全使用。(The invention relates to the technical field of rotary joints, and discloses a hydraulic rotary joint for rotation of an excavator, which comprises a fixed shell, wherein a rotary mandrel is movably sleeved on an inner ring of the fixed shell, an oil inlet is formed in the middle of the top of the rotary mandrel, a hydraulic hole is formed in an annular outer ring of a through hole in the rotary mandrel, an annular groove is formed in the position, located at the bottom of the oil inlet, in the fixed shell and communicated with the hydraulic hole, a stable lantern ring is movably sleeved at the position, located at one side of the annular groove, in the fixed shell, an alarm is fixedly installed at the position, located at one side of the stable lantern ring, in the fixed shell, a penetrating telescopic sliding hole is formed in the middle of the stable lantern ring, the alarm is arranged in the fixed shell through the stable lantern ring, a hydraulic adjusting head is sleeved in, the rotary mandrel can be effectively protected from deviation and the rotary joint can be controlled to be safely used.)

1. The utility model provides an excavator rotates and uses hydraulic pressure rotary joint, including fixed casing (1), rotatory dabber (2) has been cup jointed in the inner circle activity of fixed casing (1), oil inlet (3) have been seted up at the middle part at rotatory dabber (2) top, through-hole (4) that run through have been seted up at the middle part of rotatory dabber (2), the inside outer lane that is located through-hole (4) of rotatory dabber (2) is cyclic annular hydraulic pressure hole (5) of having seted up, the outer lane fixed mounting that rotatory dabber (2) cup jointed the position both ends with fixed casing (1) has ball bearing (6), the position fixed mounting that the outer lane of rotatory dabber (2) is located between ball bearing (6) and oil inlet (3) has O type circle (7), ring channel (8) have been seted up to the inside position that is located oil inlet (3) bottom of fixed casing (1), ring channel: the utility model discloses a hydraulic pressure hole (5) for the hydraulic pressure hole, including fixed casing (1), the inside position activity that is located ring channel (8) one side of fixed casing (1) has cup jointed firm lantern ring (9), the inside position fixed mounting that is located firm lantern ring (9) one side of fixed casing (1) has alarm (10), firm lantern ring (9) are the little shape in the big middle part in both ends, the activity of the one end outer lane that ring channel (8) were kept away from in firm lantern ring (9) has cup jointed supplementary bearing (11), the outer lane at rotatory dabber (2) is cup jointed in the bottom of firm lantern ring (9), fastening bolt (12) are installed through the screw thread in the position that rotatory dabber (2) are located between firm.

2. The hydraulic swivel joint for excavator rotation according to claim 1, wherein: the middle part of the stable sleeve ring (9) is provided with a penetrating telescopic sliding hole (901), the top part of one end, far away from the annular groove (8), of the stable sleeve ring (9) is provided with an air cavity (902) communicated with the telescopic sliding hole (901), one end, close to the annular groove (8), of the telescopic sliding hole (901) is movably sleeved with a hydraulic adjusting head (13), one end, far away from the annular groove (8), of the telescopic sliding hole (901) is movably sleeved with a switch to trigger an ejector rod (14), the bottom of an inner cavity of the air cavity (902) is movably sleeved with a limiting sliding block (15), and the position between the hydraulic adjusting head (13) and the switch trigger ejector rod (14) is filled with hydraulic oil (16).

3. The hydraulic swivel joint for excavator rotation according to claim 1, wherein: the top notch of the annular groove (8) is larger than the bottom notch, and the width of the bottom notch of the annular groove (8) is larger than the diameter of the hydraulic hole (5).

4. The hydraulic swivel joint for excavator rotation according to claim 2, wherein: the top of the hydraulic adjusting head (13) is provided with an oblique angle, and the distance between the end part of the hydraulic adjusting head (13) and the telescopic sliding hole (901) under the normal condition is the same as the distance between the switch touch ejector rod (14) and the alarm (10).

5. The hydraulic swivel joint for excavator rotation according to claim 2, wherein: the bottom of the limiting sliding block (15) and the side edge of the switch touch ejector rod (14) are in an oblique angle shape and are attached to each other, and the horizontal length of the oblique angle of the switch touch ejector rod (14) is larger than the distance between the switch touch ejector rod (14) and the alarm (10).

6. The hydraulic swivel joint for excavator rotation according to any one of claims 1 to 5, wherein: the work control flow of the alarm (10) is as follows: the alarm (10) is characterized in that a switch of the alarm transmits a signal to a control system after being triggered, the control system adjusts driving hydraulic pressure and feeds the driving hydraulic pressure back to the alarm (10), the alarm (10) gives a sound to clean the rotary joint, and the alarm (10) does not give a sound to control the hydraulic pressure so as to continue working.

Technical Field

The invention relates to the technical field of rotary joints, in particular to a hydraulic rotary joint for rotation of an excavator.

Background

The excavator is a mechanical equipment very commonly used today, it can save a large amount of time compared in the manpower, and the operation of excavator itself is not very complicated yet, mainly utilize fuselage control bucket to dig and get actions such as, the hydraulic pressure rotary joint that rotation position between fuselage and the base adopted is connected, this kind of simple convenient to use of joint design, the fixed casing that utilizes the outer lane cup joints inside rotatory dabber, and set up slotted and rotatory epaxial through-hole of spindle and communicate all the time on the casing, can realize the fuel feeding all the time when rotatory like this and pass through, but this kind of rotary joint still has some problems:

1. when the hydraulic rotary joint works, the coaxiality between the rotary mandrel and the fixed shell is ensured, in practice, the working of the machine body can generate acting forces with different directions and different sizes, so that the rotary mandrel connected with the machine body can generate deviation, and a movable sleeved connection mode is adopted between the rotary mandrel and the fixed shell, so that the rotary mandrel and the fixed shell can generate inclined deformation due to the action of the force applied to the machine body, the rotating effect and friction are slightly influenced, and the mechanical damage can be generated between the two ends of the mandrel and the shell due to the gravity, so that the hydraulic overflow causes safety accidents;

2. the hydraulic rotary joint still transmits very high hydraulic pressure at the pivoted in-process, rotary joint department only is responsible for rotatoryly in the in-service use, like this when hydraulic pressure is unstable, especially hydraulic pressure increases will cause rotary joint department's bearing load greatly increased, and its load of this kind of movable muffjoint's connected mode of itself just receives very big restriction, rescue when hydraulic pressure increases and can cause the overload like this, thereby cause the potential safety hazard, still can have impurity in hydraulic medium simultaneously, these impurity also accumulate easily in the muffjoint department, also can cause the load increase like this, and current hydraulic rotary joint can't realize effectively controlling and avoiding at all when these circumstances appear.

Disclosure of Invention

In view of the above-mentioned drawbacks of the background art, the present invention provides a hydraulic swivel joint for excavator rotation, which has the advantages of good stability and high safety, and solves the problems of the background art.

The invention provides the following technical scheme: a hydraulic rotary joint for rotation of an excavator comprises a fixed shell, wherein a rotary mandrel is movably sleeved on an inner ring of the fixed shell, an oil inlet is formed in the middle of the top of the rotary mandrel, a through hole is formed in the middle of the rotary mandrel, a hydraulic hole is formed in an annular outer ring positioned in the through hole in the rotary mandrel, ball bearings are fixedly installed on the outer rings at two ends of a sleeved part of the rotary mandrel and the fixed shell, an O-shaped ring is fixedly installed at a position, between the ball bearings and the oil inlet, of the outer ring of the rotary mandrel, a ring groove is formed in a position, positioned at the bottom of the oil inlet, in the fixed shell, and is communicated with the hydraulic hole, a stable lantern ring is movably sleeved at a position, positioned at one side of the ring groove, in the fixed shell, an alarm is fixedly, the auxiliary bearing is movably sleeved on the outer ring of the end, away from the annular groove, of the stabilizing lantern ring, the outer ring of the rotating mandrel is sleeved on the bottom of the stabilizing lantern ring, and the position, located between the bottom of the stabilizing lantern ring and the hydraulic hole, of the rotating mandrel is provided with a fastening bolt through threads.

Preferably, a penetrating telescopic sliding hole is formed in the middle of the stable lantern ring, an air cavity communicated with the telescopic sliding hole is formed in the top of one end, away from the annular groove, of the stable lantern ring, a hydraulic adjusting head is movably sleeved at one end, close to the annular groove, of the telescopic sliding hole, a switch is movably sleeved at one end, away from the annular groove, of the telescopic sliding hole, a push rod is touched, a limiting slide block is movably sleeved at the bottom of an inner cavity of the air cavity, and hydraulic oil is filled in a position, between the hydraulic adjusting head and the switch touch push rod.

Preferably, the top notch of the annular groove is larger than the bottom notch, and the width of the bottom notch of the annular groove is larger than the diameter of the hydraulic hole.

Preferably, the top of the hydraulic adjusting head is provided with an oblique angle, and the distance between the end part of the hydraulic adjusting head and the telescopic sliding hole under the normal condition is the same as the distance between the switch triggering ejector rod and the alarm.

Preferably, the bottom of the limiting sliding block and the side edge of the switch touch ejector rod are in an oblique angle shape and are attached to each other, and the horizontal length of the oblique angle of the switch touch ejector rod is larger than the distance between the switch touch ejector rod and the alarm.

Preferably, the work control flow of the alarm is as follows: the alarm switch transmits a signal to the control system after being triggered, the control system adjusts the driving hydraulic pressure and feeds the driving hydraulic pressure back to the alarm after being adjusted, the alarm sounds to clean the rotary joint, and the alarm does not sound to control the hydraulic pressure so as to continue working.

The invention has the following beneficial effects:

1. through being provided with firm lantern ring inner circle and rotatory dabber fixed connection and outer lane and fixed casing activity and cup joint, compare in prior art, set up the firm lantern ring between rotatory dabber and the fixed casing, and vertical parallel cup joints between the tip fixed casing of the firm lantern ring, there is not the clearance of rocking, can be because the effect of the firm lantern ring and can't take place the skew and rock when the trend of slope appears in rotatory dabber atress, the firm lantern ring also cup joints with fixed casing activity simultaneously, can not produce big friction influence and can also play the effect of protection rotatory dabber simultaneously.

2. Through being provided with the alarm in fixed casing, and it touches ejector pin and limit slide to cup joint hydraulic pressure regulation head cooperation switch in the firm lantern ring, compare in prior art, can inwards support and press hydraulic pressure regulation head when hydraulic pressure load has surpassed the load, thereby push the switch and touch the ejector pin, will push open limit slide when the load that surpasses is too big, thereby let the switch touch the ejector pin and push up alarm switch and trigger the warning, and then judge through the control whether the drive fluid pressure is too big or impurity blocks up, if hydraulic pressure is too big then control regulation, load reduces limit slide and can touch the ejector pin back to the normal position with the switch after the regulation, again with hydraulic pressure regulation head reset, if hybrid blocks up then the alarm still can report an alarm after adjusting hydraulic pressure, department stop work this moment, dismantle rotary joint gets off the clearance.

Drawings

FIG. 1 is a schematic view of the present invention;

FIG. 2 is an overall half-sectional view of the structure of the present invention;

FIG. 3 is an enlarged view taken at A in FIG. 2;

fig. 4 is a detection control flowchart.

In the figure: 1. a stationary housing; 2. rotating the mandrel; 3. an oil inlet; 4. a through hole; 5. a hydraulic bore; 6. a ball bearing; 7. an O-shaped ring; 8. an annular groove; 9. a stabilizing collar; 901. a telescopic slide hole; 902. an air cavity; 10. an alarm; 11. an auxiliary bearing; 12. fastening a bolt; 13. a hydraulic adjusting head; 14. the switch touches the ejector rod; 15. a limiting slide block; 16. and (5) hydraulic oil.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.

Referring to fig. 1-4, a hydraulic swivel joint for rotation of an excavator comprises a fixed housing 1, a rotating mandrel 2 is movably sleeved on an inner ring of the fixed housing 1, an oil inlet 3 is formed in the middle of the top of the rotating mandrel 2, a through hole 4 is formed in the middle of the rotating mandrel 2, a hydraulic hole 5 is annularly formed in an outer ring of the rotating mandrel 2, which is located in the through hole 4, ball bearings 6 are fixedly installed on outer rings at two ends of a sleeved portion of the rotating mandrel 2 and the fixed housing 1, an O-ring 7 is fixedly installed at a position, which is located between the ball bearings 6 and the oil inlet 3, of the outer ring of the rotating mandrel 2, an annular groove 8 is formed in a position, which is located at the bottom of the oil inlet 3, in the fixed housing 1, the annular groove 8 is communicated with the hydraulic hole 5, a stable lantern ring 9 is movably sleeved at a position, which is, the stabilizing lantern ring 9 is in a shape with two large ends and a small middle part, an auxiliary bearing 11 is movably sleeved on the outer ring of one end of the stabilizing lantern ring 9 far away from the annular groove 8, the bottom of the stabilizing lantern ring 9 is sleeved on the outer ring of the rotating mandrel 2, a fastening bolt 12 is installed at the position of the rotating mandrel 2 between the bottom of the stabilizing lantern ring 9 and the hydraulic hole 5 through threads, a penetrating telescopic sliding hole 901 is formed in the middle of the stabilizing lantern ring 9, an air cavity 902 communicated with the telescopic sliding hole 901 is formed in the top of one end of the stabilizing lantern ring 9 far away from the annular groove 8, a hydraulic adjusting head 13 is movably sleeved at one end of the telescopic sliding hole 901 close to the annular groove 8, a switch touch ejector rod 14 is movably sleeved at one end of the telescopic sliding hole 901 far away from the annular groove 8, a limit slider 15 is movably sleeved at the bottom of the inner cavity of the air cavity 902, compressed air is filled, when the load disappears, the air pressure is higher, the limiting slide block 15 can descend again, and the position between the hydraulic adjusting head 13 and the switch touch ejector rod 14 is filled with hydraulic oil 16.

Wherein, the top notch of ring channel 8 is greater than the bottom notch, and the bottom notch width of ring channel 8 is greater than the diameter of hydraulic pressure hole 5, and hydraulic medium can be stored to the opening of ring channel 8 greatly, guarantees to have hydraulic medium's entering all the time in the hydraulic pressure hole 5 simultaneously.

The top of the hydraulic adjusting head 13 is provided with an oblique angle, the distance between the end of the hydraulic adjusting head 13 and the telescopic sliding hole 901 under normal conditions is the same as the distance between the switch touch ejector rod 14 and the alarm 10, the distance is the maximum load limit of the rotary joint, when the load is reached, the hydraulic adjusting head 13 and the switch touch ejector rod 14 to trigger the switch of the alarm 10, the design is designed for more accurate and convenient response, no error range exists, and the safety and the accuracy are higher.

Wherein, the bottom of limit slider 15 and the side that the switch touched ejector pin 14 all are the bevel shape and laminate each other, and the bevel horizontal length that the switch touched ejector pin 14 is greater than the distance between switch touched ejector pin 14 and the alarm 10, utilizes the design at oblique angle can realize the effect of promotion, and the length at control oblique angle, loses pressure in the length range and will be supported back once more, realizes the self-adaptation regulation, need not be through extra control system simple and convenient.

The working control flow of the alarm 10 is as follows: the alarm 10 switch transmits the signal to the control system after touching, and the control system feeds back the alarm 10 after adjusting the driving hydraulic pressure, and the alarm 10 needs to be cleaned when sounding, and the alarm 10 controls the hydraulic pressure when not sounding, can continue to work, and can realize the control under different hydraulic pressure conditions through the feedback of the alarm 10.

The working principle is that when the hydraulic pressure is too high, the fixed shell 1 is fixed with the base, the rotating mandrel 2 is fixedly connected with the machine body, a hydraulic medium enters from the oil inlet 3 and enters into the hydraulic hole 5 through the annular groove 8, when the machine body is stressed, the rotating mandrel 2 is driven to have a tendency of offset, at the moment, the rotating mandrel 2 is stabilized and cannot shake due to the existence of the stabilizing lantern ring 9, when the hydraulic pressure is too high, the hydraulic pressure adjusting head 13 is subjected to a large load pressure, the hydraulic pressure adjusting head is contracted towards the inside of the telescopic sliding hole 901, the switch trigger ejector rod 14 is pushed through hydraulic oil 16, the switch trigger ejector rod 14 pushes the limiting slide block 15 at the top up and triggers the switch of the alarm 10 per se, the driving hydraulic pressure is reduced through the control of the control system, at the moment, if the alarm 10 does not sound, the driving hydraulic pressure is too high, the, if the alarm 10 still gives an alarm, it indicates that impurities are blocked in the rotary joint at the moment, and the rotary joint needs to be stopped, disassembled and cleaned, so that the rotary joint cannot continue to work.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.