Novel anti-winding rotating joint

Abstract

The novel anti-winding rotary joint comprises a first adapter, a bearing fixing seat, a bearing, a sealing block and a second adapter, the first adapter penetrates through the bearing fixing seat and the bearing, the sealing block is inserted into the second adapter, the sealing block is arranged between the first adapter and the second adapter, and the second adapter is connected with the bearing fixing seat. The bearing is a ball bearing, the first adapter is sleeved with the bearing, at least one of the bearing fixing base and the second adapter is connected with an outer ring of the bearing, an annular protruding edge protruding inwards is arranged at the upper end of the bearing fixing base, and the upper end of the outer ring of the bearing is limited by the lower end of the annular protruding edge. A limiting piece is arranged on the first conversion head, the upper end of the limiting piece is connected with an inner ring of the bearing, and the bearing fixing base is in threaded connection with the second conversion head. The high-pressure water gun is good in sealing performance, and can effectively solve the problem that a high-pressure water gun pipeline is wound due to large relative rotation resistance.

Description

Technical Field

[0001] The utility model relates to the field of high-pressure cleaning machines, in particular to an anti-winding hose structure. Background Art

[0002] High-pressure pipelines in the prior art need to be connected by joints, and since high-pressure pipelines or components need to be rotated or moved during use, the pipelines or components need to be able to rotate relative to each other to facilitate user use or prevent pipelines such as high-pressure pipes from getting tangled.

[0003] However, there are currently the following disadvantages: 1. Due to the internal pressure in the pipeline, the internal pressure will cause pressure on the internal parts of the joint, resulting in the joint being unable to rotate or having very large resistance to rotation; 2. In addition, due to the long-term aging or wear of the internal seals of the joint, the inside of the joint may not be sealed, resulting in water leakage or jamming, affecting use.

[0004] The anti-entanglement joints in the prior art all use connecting screws to connect the conversion heads at both ends, and open a groove on the outer surface of the inserted conversion head to place a sealing ring or add a sealing ring seat to achieve a rotary seal of the conversion head. However, there is internal pressure in the pipeline that always applies axial force. As the internal pressure increases, the sealing ring and the conversion head become tighter, generating a large friction resistance, resulting in the conversion head not rotating smoothly. Therefore, this method cannot solve the problem of large relative rotation resistance between the conversion heads.

[0005] In view of this, it is necessary to develop a new type of anti-winding rotating joint to solve the above problems. Utility Model Content

[0006] The invention aims to provide a novel anti-entanglement rotating joint, which not only has good sealing performance, but also can effectively solve the problem of entanglement of high-pressure water gun pipelines due to large relative rotation resistance.

[0007] In order to achieve the above-mentioned invention object, the technical solution adopted by the utility model is: a new anti-winding rotary joint, including a first conversion head, a bearing fixing seat, a bearing, a sealing block, a second conversion head,

[0008] The first conversion head is inserted into the second conversion head through the bearing fixing seat, the bearing and the sealing block. The sealing block is arranged between the first conversion head and the second conversion head. The bearing is a ball bearing.

[0009] The bearing sleeve is arranged on the first conversion head, at least one of the bearing fixing seat and the second conversion head is connected to the outer ring of the bearing, the upper end of the bearing fixing seat is provided with an annular convex edge protruding inward, and the lower end of the annular convex edge limits the upper end of the outer ring of the bearing,

[0010] The first conversion head is provided with a limiter, and the upper end of the limiter is connected to the inner ring of the bearing.

[0011] The bearing fixing seat is threadedly connected to the second conversion head.

[0012] In a preferred technical solution, the second conversion head is provided with a first step, the first conversion head is provided with a second step, and an annular structure is provided on the outer periphery of the upper end of the sealing block, and the annular structure is provided between the first step and the second step.

[0013] In a preferred technical solution, the lower end of the first conversion head has a contraction portion, the outer peripheral surface of the contraction portion is a smooth plane, and the sealing block is sleeved on the contraction portion.

[0014] In a preferred technical solution, a sealing member is further provided, and the sealing member is sleeved on the lower end of the first conversion head, and the sealing member is sandwiched between the sealing block, the first conversion head and the second conversion head.

[0015] In a further technical solution, the upper end of the seal abuts against the lower end of the sealing block, the second conversion head is provided with a third step, and the lower end of the seal abuts against the third step.

[0016] In a preferred technical solution, the limiting member is a shaft shoulder, the upper end of the shaft shoulder abuts against the lower end of the bearing, and the shaft shoulder is integrally formed with the first conversion head.

[0017] In the preferred technical solution, the first conversion head is provided with a fourth step, a gap is left between the outer side of the fourth step and the inner side of the upper end of the bearing fixing seat, the limiting member is a retaining spring, and the first conversion head is also provided with an annular groove, the limiting member is arranged in the annular groove, and the upper end of the limiting member abuts against the lower end of the bearing.

[0018] In a preferred technical solution, the first conversion head is provided with a fifth step, and a gap is left between the fifth step and the bearing fixing seat.

[0019] In the present technical solution, at least one of the bearing fixing seat and the second conversion head is connected to the outer ring of the bearing, and the bearing fixing seat is threadedly connected to the second conversion head; and the upper end of the limiter is connected to the inner ring of the bearing, so that the second conversion head and the first conversion head have relative rotation freedom.

[0020] The utility model also discloses a novel anti-winding rotating joint, comprising a first conversion head, a bearing fixing seat, a bearing, a sealing block, and a second conversion head.

[0021] The first conversion head is inserted into the second conversion head through the bearing fixing seat, the bearing and the sealing block. The sealing block is arranged between the first conversion head and the second conversion head. The bearing is a plane bearing.

[0022] The bearing sleeve is arranged on the first conversion head, the upper end of the bearing fixing seat is provided with an annular convex edge protruding inward, and the lower end of the annular convex edge is connected to the upper end of the bearing.

[0023] The first conversion head is provided with a limiter, and the upper end of the limiter is connected to the lower end of the bearing.

[0024] The bearing fixing seat is threadedly connected to the second conversion head.

[0025] In a preferred technical solution, the second conversion head is provided with a first step, the first conversion head is provided with a second step, and an annular structure is provided on the outer periphery of the upper end of the sealing block, and the annular structure is provided between the first step and the second step.

[0026] In a preferred technical solution, the lower end of the first conversion head has a contraction portion, the outer peripheral surface of the contraction portion is a smooth plane, and the sealing block is sleeved on the contraction portion.

[0027] In a preferred technical solution, a sealing member is further provided, and the sealing member is sleeved on the lower end of the first conversion head, and the sealing member is sandwiched between the sealing block, the first conversion head and the second conversion head.

[0028] In a further technical solution, the upper end of the seal abuts against the lower end of the sealing block, the second conversion head is provided with a third step, and the lower end of the seal abuts against the third step.

[0029] In a further technical solution, the upper end of the seal abuts against the lower end of the sealing block, the second conversion head is provided with a third step, and the lower end of the seal abuts against the third step.

[0030] In a preferred technical solution, the limiting member is a shaft shoulder, the upper end of the shaft shoulder abuts against the lower end of the bearing, and the shaft shoulder is integrally formed with the first conversion head.

[0031] In the preferred technical solution, the first conversion head is provided with a fourth step, a gap is left between the outer side of the fourth step and the inner side of the upper end of the bearing fixing seat, the limiting member is a retaining spring, and the first conversion head is also provided with an annular groove, the limiting member is arranged in the annular groove, and the upper end of the limiting member abuts against the lower end of the bearing.

[0032] In a preferred technical solution, the first conversion head is provided with a fifth step, and a gap is left between the fifth step and the bearing fixing seat.

[0033] In a preferred technical solution, the sealing block and the sealing member are integrally formed.

[0034] In the technical solution, the number of the ball bearings is one or more, and when there are multiple ball bearings, they are stacked up and down.

[0035] In the technical solution, the sealing blocks and sealing parts are made of rubber, ceramic, polytetrafluoroethylene or other forms of sealing parts. The sealing method can be oil seal or water seal, realizing mechanical seal, rubber seal or their double sealing method, with low friction resistance, free rotation and sealing effect.

[0036] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0037] 1. The utility model adopts a plug-in matching mode between two conversion heads, and by arranging the bearing between the bearing fixing seat and the first conversion head, there is no mutual force relationship caused by the existence of pressure between the two conversion heads, and the two conversion heads can rotate smoothly.

[0038] 2. The conversion heads of the utility model use mechanical seals or rubber seals or their double seals, and the seal is controlled by the gap to make the friction resistance low, the rotation is free and the sealing effect is good.

[0039] 3. The utility model sets the outer peripheral surface of the contraction part of the first conversion head as a smooth plane, and the sealing block is sleeved on the contraction part of the first conversion head. When there is internal pressure in the pipeline, the sealing effect remains unchanged, the sealing block will not become tight but only loose, thereby ensuring the relative smoothness between the first conversion head and the second conversion head. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is an exploded schematic diagram of the first embodiment of the utility model.

[0041] Figure 2 It is a schematic cross-sectional structural diagram of the first embodiment of the utility model after assembly.

[0042] Figure 3 It is an exploded schematic diagram of the second embodiment of the present utility model.

[0043] Figure 4 It is a schematic cross-sectional view of the assembled structure of the second embodiment of the utility model.

[0044] Figure 5 It is a schematic cross-sectional view of the assembled structure of the third embodiment of the utility model.

[0045] Figure 6 It is a schematic cross-sectional view of the assembled structure of the fourth embodiment of the utility model.

[0046] Among them: 1. first conversion head; 2. bearing fixing seat; 3. bearing; 4. second conversion head; 5. limiter; 6. sealing block; 7. sealing; 8. first step; 9. second step; 10. annular structure; 11. third step; 12. fourth step; 13. annular convex edge; 14. fifth step. DETAILED DESCRIPTION

[0047] The utility model is further described below in conjunction with the accompanying drawings and embodiments: Embodiment 1

[0048] See also Figure 1 , Figure 2 As shown, a new type of anti-winding rotary joint includes a first conversion head 1, a bearing fixing seat 2, a bearing 3, a sealing block 6, and a second conversion head 4. The first conversion head 1 passes through the bearing fixing seat 2, the bearing 3, and the sealing block 6 and is inserted into the second conversion head 4. The sealing block 6 is arranged between the first conversion head 1 and the second conversion head 4. The bearing 3 is a ball bearing, and the bearing 3 is sleeved on the first conversion head 1. At least one of the bearing fixing seat 2 and the second conversion head 4 is connected to the outer ring of the bearing 3. The upper end of the bearing fixing seat 2 is provided with an inwardly protruding annular ridge 13, and the lower end of the annular ridge 13 limits the upper end of the outer ring of the bearing 3. The first conversion head 1 is provided with a limiting member 5, and the upper end of the limiting member 5 is connected to the inner ring of the bearing 3. The bearing fixing seat 2 is threadedly connected to the second conversion head 4.

[0049] In this embodiment, the bearings 3 are ball bearings, two of which are stacked one above the other.

[0050] In this embodiment, the second conversion head 4 is provided with a first step 8, and the first conversion head 1 is provided with a second step 9. Figure 6 The sealing block 6 in the embodiment is cylindrical, and an annular structure 10 is provided on the outer periphery of the upper end of the sealing block 6. After assembly, the annular structure 10 is located between the first step 8 and the second step 9 and abuts against each other. The lower end of the first conversion head 1 has a contraction portion, and the outer peripheral surface of the contraction portion is a smooth plane. The sealing block 6 is sleeved on the contraction portion, and a sealing member 7 is also provided. After assembly, the sealing member 7 is sandwiched between the sealing block 6, the first conversion head 1 and the second conversion head 4, and the lower end of the sealing block 6 abuts against the upper end of the sealing member 7, and the lower end of the sealing member 7 abuts against the first step 11. The outer peripheral surface of the contraction portion is a smooth plane. Even if there is internal pressure in the pipeline, the sealing block and the sealing member will not be squeezed and tightened by the first conversion head, but will only become loose, thereby ensuring the relative smoothness between the first conversion head and the second conversion head.

[0051] In this embodiment, the first conversion head 1 is provided with a fourth step 12, and a gap is left between the outer side of the fourth step and the inner side of the upper end of the bearing fixing seat to prevent the rotation from being blocked after contact. The first conversion head is also provided with an annular groove, and the limiter 5 is arranged in the annular groove. The upper end of the limiter 5 abuts against the lower end of the bearing 3, and a gap is left between the fifth step 14 and the upper end of the bearing fixing seat 2. Due to the provision of the fourth step 12 and the fifth step 14, the limiter 5 is preferably a retaining spring. After the bearing is sleeved and assembled from bottom to top, the upper end of the retaining spring abuts against the inner ring of the lower end of the bearing 3, which limits the first conversion head 1 from being forced to move to one side when there is pressure inside the pipeline. The first conversion head 1 will apply force to the bearing, and the bearing will be fixed by the annular convex edge of the bearing fixing seat 2 and the limiter 5, which not only ensures the smooth rotation of the first conversion head 1, but also reduces friction. The sealing block 6 and the sealing member 7 are fixed in the second conversion head 4.

[0052] In this embodiment, the bearing fixing seat 2 is connected to the outer ring of the bearing 3 , and the bearing is not in contact with the second conversion head 4 .

[0053] In this embodiment, the sealing block 6 is a ceramic sealing block, and the sealing member 7 is a rubber ring. Through mechanical sealing, rubber sealing and their double sealing methods, the friction resistance is low, the rotation is free and the sealing effect is achieved.

[0054] In this embodiment, after assembly, the bottom of the first conversion head 1 is lower than the bottom of the rubber member 7 . Embodiment 2

[0055] See also Figure 3 , Figure 4 As shown, a new type of anti-winding rotary joint includes a first conversion head 1, a bearing fixing seat 2, a bearing 3, a sealing block 6, and a second conversion head 4. The first conversion head 1 passes through the bearing fixing seat 2, the bearing 3, and the sealing block 6 and is inserted into the second conversion head 4. The sealing block 6 is arranged between the first conversion head 1 and the second conversion head 4. The bearing 3 is a ball bearing, and the bearing 3 is sleeved on the first conversion head 1. At least one of the bearing fixing seat 2 and the second conversion head 4 is connected to the outer ring of the bearing 3. The upper end of the bearing fixing seat 2 is provided with an inwardly protruding annular ridge 13, and the lower end of the annular ridge 13 limits the upper end of the outer ring of the bearing 3. The first conversion head 1 is provided with a limit member 5, and the upper end of the limit member 5 is connected to the inner ring of the bearing 3. The bearing fixing seat 2 is threadedly connected to the second conversion head 4.

[0056] In this embodiment, the bearings 3 are ball bearings, two of which are stacked one above the other.

[0057] In this embodiment, the second conversion head 4 is provided with a first step 8, and the first conversion head 1 is provided with a second step 9. Figure 4The sealing block 6 in the embodiment is cylindrical, and an annular structure 10 is provided on the outer periphery of the upper end of the sealing block 6. After assembly, the annular structure 10 is located between the first step 8 and the second step 9 and abuts against each other. The lower end of the first conversion head 1 has a contraction portion, and the outer peripheral surface of the contraction portion is a smooth plane. The sealing block 6 is sleeved on the contraction portion, and a sealing member 7 is also provided. After assembly, the sealing member 7 is sandwiched between the sealing block 6, the first conversion head 1 and the second conversion head 4, and the lower end of the sealing block 6 abuts against the upper end of the sealing member 7, and the lower end of the sealing member 7 abuts against the first step 11. The outer peripheral surface of the contraction portion is a smooth plane. Even if there is internal pressure in the pipeline, the sealing effect of the sealing block and the sealing member remains unchanged, and will not be squeezed by the first conversion head to cause tightening, thereby ensuring the relative smoothness between the first conversion head and the second conversion head.

[0058] In this embodiment, the first conversion head 3 is located in a section above the limit member 5, and no step structure is set. The limit member 5 is a shaft shoulder. During assembly, the bearing can be directly sleeved from top to bottom, and the upper end of the shaft shoulder abuts against the lower end of the inner ring of the bearing. The shaft shoulder and the first conversion head are integrally formed. The annular protrusion 13 of the bearing fixing seat 2 limits the upper end of the outer ring of the bearing 3. After assembly, the annular protrusion 13 abuts against the upper end of the outer ring of the bearing 3. This arrangement allows the first conversion head 3 and the second conversion head 4 to rotate smoothly.

[0059] In this embodiment, the bearing fixing seat 2 is connected to the outer ring of the bearing 3 , and the bearing 3 is not in contact with the second conversion head 4 .

[0060] In this embodiment, the sealing block 6 is a resin sealing block, and the sealing member 7 is an O-ring, which realizes a double sealing mode of mechanical sealing and rubber sealing, has low friction resistance, can rotate freely and has a sealing effect. Embodiment 3

[0061] See also Figure 5 As shown, a new type of anti-winding rotary joint includes a first conversion head 1, a bearing fixing seat 2, a bearing 3, a sealing block 6, and a second conversion head 4. The first conversion head 1 passes through the bearing fixing seat 2, the bearing 3, and the sealing block 6 and is inserted into the second conversion head 4. The sealing block 6 is arranged between the first conversion head 1 and the second conversion head 4. The bearing 3 is a plane bearing, and the bearing 3 is sleeved on the first conversion head 1. The upper end of the bearing fixing seat 2 is provided with an inwardly protruding annular flange 13, and the lower end of the annular flange 13 is connected to the upper end of the bearing 3. A limit member 5 is provided on the first conversion head 1, and the upper end of the limit member 5 is connected to the lower end of the bearing 3. The bearing fixing seat 2 is threadedly connected to the second conversion head 4.

[0062] In this embodiment, the second conversion head 4 is provided with a first step 8 , the first conversion head 1 is provided with a second step 9 , and the upper periphery of the sealing block 6 is provided with an annular structure 10 , which is provided between the first step 8 and the second step 9 .

[0063] In this embodiment, the lower end of the first conversion head 1 has a contraction portion, the outer peripheral surface of the contraction portion is a smooth plane, the sealing block 6 is sleeved on the contraction portion, and a sealing member 7 is also provided. The sealing member 7 is sleeved on the lower end of the first conversion head 1, and the sealing member 7 is sandwiched between the sealing block 6, the first conversion head 1 and the second conversion head 4.

[0064] In this embodiment, the upper end of the sealing member 7 abuts against the lower end of the sealing block 6 , the second conversion head 4 is provided with a third step 11 , and the lower end of the sealing member 7 abuts against the third step 11 .

[0065] In this embodiment, the limit member 5 is a retaining spring, the number is 1, the first conversion head is provided with an annular groove, and the retaining spring is arranged in the annular groove. After assembly, the lower end of the annular protrusion 13 abuts against the upper end of the plane bearing, and the upper end of the retaining spring abuts against the lower end of the plane bearing.

[0066] In this embodiment, the sealing block 6 is a resin sealing block, and the sealing member 7 is an O-ring, which realizes a double sealing mode of mechanical sealing and rubber sealing, has low friction resistance, can rotate freely and has a sealing effect. Embodiment 4

[0067] See also Figure 6 As shown, the difference between this embodiment and the third embodiment is that the structure of the upper part of the first conversion head in this embodiment is different, no step is set on the limit member 5, the limit member 5 is a shoulder, and the shoulder is integrally formed with the first conversion head.

[0068] In the description of the present invention, it is necessary to understand that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0069] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the protection scope of the present invention.

Claims

1. A new type of anti-winding rotary joint, characterized in that: The invention comprises a first conversion head (1), a bearing fixing seat (2), a bearing (3), a sealing block (6), and a second conversion head (4); the first conversion head (1) passes through the bearing fixing seat (2), the bearing (3), and the sealing block (6) and is inserted into the second conversion head (4); the sealing block (6) is arranged between the first conversion head (1) and the second conversion head (4); the bearing (3) is a ball bearing; the bearing (3) is sleeved on the first conversion head (1); at least one of the bearing fixing seat (2) and the second conversion head (4) is connected to the outer ring of the bearing (3); the upper end of the bearing fixing seat (2) is provided with an annular convex edge (13) protruding inwardly; the lower end of the annular convex edge (13) limits the upper end of the outer ring of the bearing (3); the first conversion head (1) is provided with a limiting member (5); the upper end of the limiting member (5) is connected to the inner ring of the bearing (3); the bearing fixing seat (2) is threadedly connected to the second conversion head (4).

2. The novel anti-winding rotary joint according to claim 1 is characterized in that: The second conversion head (4) is provided with a first step (8), the first conversion head (1) is provided with a second step (9), and an annular structure (10) is provided on the outer periphery of the upper end of the sealing block (6), and the annular structure (10) is provided between the first step (8) and the second step (9).

3. The novel anti-winding rotary joint according to claim 1 is characterized in that: The lower end of the first conversion head (1) has a contraction portion, the outer peripheral surface of the contraction portion is a smooth plane, and the sealing block (6) is sleeved on the contraction portion.

4. The novel anti-winding rotary joint according to claim 1 is characterized in that: A sealing member (7) is also provided, wherein the sealing member (7) is sleeved on the lower end of the first conversion head (1), and the sealing member (7) is sandwiched between the sealing block (6), the first conversion head (1) and the second conversion head (4).

5. The novel anti-winding rotary joint according to claim 4 is characterized in that: The upper end of the sealing member (7) abuts against the lower end of the sealing block (6); the second conversion head (4) is provided with a third step (11); and the lower end of the sealing member (7) abuts against the third step (11).

6. A new type of anti-winding rotary joint, characterized by: The invention comprises a first conversion head (1), a bearing fixing seat (2), a bearing (3), a sealing block (6), and a second conversion head (4); the first conversion head (1) passes through the bearing fixing seat (2), the bearing (3), and the sealing block (6) and is inserted into the second conversion head (4); the sealing block (6) is arranged between the first conversion head (1) and the second conversion head (4); the bearing (3) is a plane bearing; the bearing (3) is sleeved on the first conversion head (1); the upper end of the bearing fixing seat (2) is provided with an annular convex edge (13) protruding inwardly; the lower end of the annular convex edge (13) is connected to the upper end of the bearing (3); the first conversion head (1) is provided with a stopper (5); the upper end of the stopper (5) is connected to the lower end of the bearing (3); the bearing fixing seat (2) is threadedly connected to the second conversion head (4).

7. The novel anti-winding rotary joint according to claim 6 is characterized in that: The second conversion head (4) is provided with a first step (8), the first conversion head (1) is provided with a second step (9), and an annular structure (10) is provided on the outer periphery of the upper end of the sealing block (6), and the annular structure (10) is provided between the first step (8) and the second step (9).

8. The novel anti-winding rotary joint according to claim 6 is characterized in that: The lower end of the first conversion head (1) has a contraction portion, the outer peripheral surface of the contraction portion is a smooth plane, and the sealing block (6) is sleeved on the contraction portion.

9. The novel anti-winding rotary joint according to claim 6 is characterized in that: A sealing member (7) is also provided, wherein the sealing member (7) is sleeved on the lower end of the first conversion head (1), and the sealing member (7) is sandwiched between the sealing block (6), the first conversion head (1) and the second conversion head (4).

10. The novel anti-winding rotary joint according to claim 9 is characterized in that: The upper end of the sealing member (7) abuts against the lower end of the sealing block (6); the second conversion head (4) is provided with a third step (11); and the lower end of the sealing member (7) abuts against the third step (11).

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