Hydraulic steering rotary joint

Abstract

The utility model discloses a hydraulic steering rotary joint, and relates to the technical field of hydraulic cylinder joints. The hydraulic steering rotary joint comprises a shell, a screwing end cover is arranged at the fixed top of the shell, a first magnetic ring is fixedly connected into the shell, a rotary mandrel is arranged in the shell, a long self-lubricating shaft sleeve and a short self-lubricating shaft sleeve are arranged at the upper end and the lower end of the rotary mandrel respectively, and a limiting spring is arranged on the outer surface of the rotary mandrel. The upper end and the lower end of the limiting spring are fixedly connected with the long self-lubricating shaft sleeve and the short self-lubricating shaft sleeve correspondingly, and a second magnetic ring mounting and dismounting mechanism is arranged on the rotating core shaft, so that a second magnetic ring can be connected with the rotating core shaft through a mounting ring; after the magnetic force is gradually weakened after the second magnetic ring is used for a long time, the arc-shaped block can be pressed downwards, so that the mounting ring and the rotating mandrel are automatically separated, and the second magnetic ring is conveniently replaced.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic cylinder joints, in particular to a hydraulic steering rotary joint. Background Art

[0002] A rotary joint is a pipe connection device whose connected pipes can rotate relative to each other. It can be used to transmit various media such as gas, liquid, oil, etc. Its compact design structure and flange connection can be effectively integrated into customer equipment.

[0003] The utility model with publication number CN218882671U discloses a rotary joint of an expansion and contraction hydraulic cylinder, including a connector housing, a rotating core shaft is arranged inside the connector housing, and an anti-wear mechanism is arranged between the rotating core shaft and the connector housing. The anti-wear mechanism performs a limit adjustment action when the rotating core shaft rotates inside the connector housing. In the above application document, two magnetic rings with the same magnetic poles on relative surfaces are arranged between the rotating core shaft and the inside of the connector housing, thereby utilizing the principle of like-sex repulsion of magnets to maintain the limited rotation of the rotating core shaft. The magnetic force of the magnetic ring will decrease after long-term use, resulting in a decrease in the effect of maintaining the limited rotation of the rotating core shaft, and it needs to be replaced in time, but the magnetic ring is fixed on the rotating core shaft and it is more troublesome to replace it. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a hydraulic steering rotary joint, which solves the problems raised in the above background technology. To achieve the above purpose, the utility model is implemented through the following technical solutions: a hydraulic steering rotary joint, comprising a shell, a screw end cover is arranged at the fixed top of the shell, a first magnetic ring is fixedly connected inside the shell, a rotating mandrel is arranged inside the shell, a long self-lubricating sleeve and a short self-lubricating sleeve are arranged at the upper and lower ends of the rotating mandrel, respectively, a limit spring is arranged on the outer surface of the rotating mandrel, and the upper and lower ends of the limit spring are fixedly connected to the long self-lubricating sleeve and the short self-lubricating sleeve, respectively, a second magnetic ring installation and disassembly mechanism is arranged on the rotating mandrel, the second magnetic ring installation and disassembly mechanism comprises a slide groove and a mounting ring, the slide groove is arranged on the side of the rotating mandrel, a slider is slidably connected inside the slide groove through a telescopic spring, a second magnetic ring is fixedly connected to the outer surface of the mounting ring, a slot is arranged on the side of the mounting ring, a card slot is arranged on the top of the mounting ring, a groove is arranged on the top of the slider, an arc block is slidably connected inside the groove through a compression spring, and a convenient pressing mechanism is arranged on the top of the mounting ring.

[0005] Preferably, the convenient pressing mechanism includes a support rod, the support rod is fixedly connected to the top of the mounting ring, the top of the support rod is fixedly connected to a fixed block, the fixed block is slidably connected to a pressure rod, the side of the pressure rod is fixedly connected to a block, the top of the block is fixedly connected to a return spring, the end of the return spring away from the block is fixedly connected to the bottom of the fixed block, the size of the pressure rod is smaller than the slot, the pressure rod can enter the slot when it moves downward, and the return spring will be gradually stretched.

[0006] Preferably, the slider is made of ferromagnetic stainless steel, the depth of the slide groove is greater than the length of the slider, the slider is not easy to rust and moves when attracted by the second magnetic ring, and the slider can be completely retracted into the slide groove.

[0007] Preferably, the slider is in the slot in the initial state, and the telescopic spring is in a stretched state in the initial state. The slider is initially attracted by the second magnetic ring and is in the slot. After the magnetic force of the second magnetic ring weakens, the telescopic spring rebounds and drives the slider to move and retract into the slide groove.

[0008] Preferably, the arc block is in the slot in the initial state, and the depth of the slot is greater than the length of the arc block. At the beginning, the arc block is in the slot to prevent the telescopic spring from rebounding and driving the slider to move, thereby preventing it from automatically falling off. Pressing the arc block can make it completely retract into the slot.

[0009] Preferably, the elastic potential energy of the return spring is greater than the gravitational potential energy of the pressure rod. In the initial state, the bottom of the pressure rod is close to the top of the arc block. When the pressure rod is pressed down, the pressure rod moves downward and drives the arc block to move downward. When released, the return spring drives the pressure rod to move upward and restore.

[0010] The utility model provides a hydraulic steering rotary joint. It has the following beneficial effects:

[0011] (1) The present application is provided with a second magnetic ring installation and disassembly mechanism, thereby achieving the goal of connecting the second magnetic ring to the rotating core shaft through the installation ring. After the magnetic force of the second magnetic ring gradually weakens after long-term use, the arc block can be pressed down to automatically separate the installation ring from the rotating core shaft, making it convenient to replace the second magnetic ring.

[0012] (2) The present application is provided with a convenient pressing mechanism, so that the pressure rod can be pressed down so that the pressure rod presses down the arc block to separate the mounting ring and the rotating core shaft. After releasing the pressure rod, it will automatically move upward to restore, which is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the internal structure of the utility model;

[0015] Figure 3 This is a schematic diagram of the structure of the second magnetic ring installation and disassembly mechanism of the utility model;

[0016] Figure 4 It is a schematic diagram of the structure of the convenient pressing mechanism inside the utility model.

[0017] In the figure: 1. Shell; 2. Screw end cover; 3. First magnetic ring; 4. Rotating mandrel; 5. Long self-lubricating sleeve; 6. Short self-lubricating sleeve; 7. Limit spring; 8. Second magnetic ring installation and disassembly mechanism; 81. Slide groove; 82. Telescopic spring; 83. Sliding block; 84. Mounting ring; 85. Second magnetic ring; 86. Slot; 87. Slot; 88. Groove; 89. Compression spring; 810. Arc block; 9. Convenient pressing mechanism; 91. Support rod; 92. Fixed block; 93. Press rod; 94. Block; 95. Reset spring. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0019] Embodiment 1

[0020] See also Figure 1-3A hydraulic steering rotary joint comprises a shell 1, a screwing end cover 2 is arranged on the top of the shell 1, a first magnetic ring 3 is fixedly connected to the inside of the shell 1, a rotating core shaft 4 is arranged inside the shell 1, a long self-lubricating sleeve 5 and a short self-lubricating sleeve 6 are arranged at the upper and lower ends of the rotating core shaft 4, a limiting spring 7 is arranged on the outer surface of the rotating core shaft 4, and the upper and lower ends of the limiting spring 7 are fixedly connected to the long self-lubricating sleeve 5 and the short self-lubricating sleeve 6 respectively, and a second magnetic ring installation and disassembly mechanism 8 is arranged on the rotating core shaft 4, and the second magnetic ring installation and disassembly mechanism 8 comprises a slide groove 81 and a mounting ring 84, the slide groove 81 is opened on the side of the rotating core shaft 4, and a slider 83 is slidably connected to the inside of the slide groove 81 through a telescopic spring 82, and the material of the slider 83 is stainless steel with ferromagnetism, the depth of the slide groove 81 is greater than the length of the slider 83, the slider 83 is not easy to rust and moves when attracted by the second magnetic ring 85, and the slider 83 can be completely retracted into the slide groove 81, and the installation The outer surface of the ring 84 is fixedly connected with a second magnetic ring 85, and a slot 86 is provided on the side of the mounting ring 84. The slider 83 is initially in the slot 86, and the telescopic spring 82 is initially in a stretched state. The slider 83 is initially attracted by the second magnetic ring 85 and is in the slot 86. After the magnetic force of the second magnetic ring 85 is weakened, the telescopic spring 82 rebounds and drives the slider 83 to move and retract into the slide groove 81. A slot 87 is provided on the top of the mounting ring 84, and a groove 88 is provided on the top of the slider 83. The interior of the groove 88 is slidably connected with an arc block 810 through a compression spring 89. The arc block 810 is initially in the slot 87, and the depth of the groove 88 is greater than the length of the arc block 810. At the beginning, the arc block 810 is in the slot 87 to prevent the telescopic spring 82 from rebounding and driving the slider 83 to move, thereby preventing it from automatically falling off. Pressing the arc block 810 can make it completely retract into the groove 88. A convenient pressing mechanism 9 is provided on the top of the mounting ring 84.

[0021] When in use, the mounting ring 84 is connected to the rotating core shaft 4. At the beginning, the slider 83 is completely in the slide groove 81, and the arc block 810 is squeezed and compressed in the groove 88 by the inner wall of the slide groove 81, and the compression spring 89 is tightened. When the side slot 86 of the mounting ring 84 fits with the slide groove 81, the second magnetic ring 85 attracts the slider 83 to move and snap into the slot 86, the telescopic spring 82 is stretched, and at the same time, the groove 88 fits with the slot 87, and the compression spring 89 rebounds to drive the arc block 810 to snap into the slot 87. At this time, the mounting ring 84 and the second magnetic ring 85 are fixed. When the magnetic force of the second magnetic ring 85 weakens after long-term use and needs to be replaced, the arc block 810 can be pressed down to make it completely retracted into the groove 88. At this time, the magnetic force of the second magnetic ring 85 cannot attract the slider 83, and the telescopic spring 82 rebounds to drive the slider 83 to completely retract into the slide groove 81. At this time, the mounting ring 84 and the rotating core shaft 4 can be separated, and the second magnetic ring 85 can be replaced.

[0022] Embodiment 2

[0023] See also Figure 1-4 On the basis of the first embodiment, the pressing mechanism 9 includes a support rod 91, which is fixedly connected to the top of the mounting ring 84. A fixing block 92 is fixedly connected to the top of the support rod 91. A pressure rod 93 is slidably connected to the fixing block 92. A side of the pressure rod 93 is fixedly connected to a block 94. A return spring 95 is fixedly connected to the top of the block 94. An end of the return spring 95 away from the block 94 is fixedly connected to the bottom of the fixing block 92. The size of the pressure rod 93 is smaller than the slot 87. The pressure rod 93 moves downward to enter the slot 87. The return spring 95 will be gradually stretched. The elastic potential energy of the return spring 95 is greater than the gravitational potential energy of the pressure rod 93. In the initial state, the bottom of the pressure rod 93 is close to the top of the arc block 810. When the pressure rod 93 is pressed down, the pressure rod 93 moves downward to drive the arc block 810 to move downward. When released, the return spring 95 drives the pressure rod 93 to move upward and restore.

[0024] During use, based on the first embodiment, when it is necessary to separate the mounting ring 84 and the rotating core shaft 4, the pressure rod 93 can be pressed down. The pressure rod 93 moves downward and can enter the slot 87 to drive the arc block 810 to move downward. The reset spring 95 will be gradually stretched. When released, the reset spring 95 drives the pressure rod 93 to move upward and restore, making it convenient to press down the arc block 810.

[0025] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A hydraulic steering rotary joint, comprising a housing (1), characterized in that: The shell (1) is provided with a screw-on end cover (2) at the top, the shell (1) is fixedly connected with a first magnetic ring (3) inside, the shell (1) is provided with a rotating core shaft (4) inside, the upper and lower ends of the rotating core shaft (4) are respectively provided with a long self-lubricating sleeve (5) and a short self-lubricating sleeve (6), the outer surface of the rotating core shaft (4) is provided with a limit spring (7), the upper and lower ends of the limit spring (7) are respectively fixedly connected with the long self-lubricating sleeve (5) and the short self-lubricating sleeve (6), and the rotating core shaft (4) is provided with a second magnetic ring installation and removal mechanism (8); The second magnetic ring installation and disassembly mechanism (8) comprises a slide groove (81) and a mounting ring (84), wherein the slide groove (81) is provided on the side of the rotating core shaft (4), a slider (83) is slidably connected to the interior of the slide groove (81) via a telescopic spring (82), a second magnetic ring (85) is fixedly connected to the outer surface of the mounting ring (84), a slot (86) is provided on the side of the mounting ring (84), a clamping slot (87) is provided on the top of the mounting ring (84), and the slider (83) is fixedly connected to the outer surface of the mounting ring (84). ) is provided with a groove (88) at the top, and an arc block (810) is slidably connected inside the groove (88) via a compression spring (89), and a convenient pressing mechanism (9) is provided at the top of the mounting ring (84). The slider (83) is made of ferromagnetic stainless steel, the depth of the slide groove (81) is greater than the length of the slider (83), and the slider (83) is in the slot (86) in the initial state, and the telescopic spring (82) is in a stretched state in the initial state.

2. A hydraulic steering rotary joint according to claim 1, characterized in that: The convenient pressing mechanism (9) comprises a support rod (91), wherein the support rod (91) is fixedly connected to the top of the mounting ring (84), the top of the support rod (91) is fixedly connected to a fixed block (92), the fixed block (92) is slidably connected to a pressure rod (93), the side of the pressure rod (93) is fixedly connected to a block (94), the top of the block (94) is fixedly connected to a return spring (95), and one end of the return spring (95) away from the block (94) is fixedly connected to the bottom of the fixed block (92).

3. A hydraulic steering rotary joint according to claim 2, characterized in that: In an initial state, the arc-shaped block (810) is located in the clamping groove (87), and the depth of the groove (88) is greater than the length of the arc-shaped block (810).

4. A hydraulic steering rotary joint according to claim 3, characterized in that: The elastic potential energy of the return spring (95) is greater than the gravitational potential energy of the pressure rod (93), and the bottom of the pressure rod (93) is close to the top of the arc block (810) in the initial state.

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