Rotary joint

Abstract

The utility model discloses a rotary joint which comprises a rotary shell and a connecting shaft, the head of the connecting shaft is arranged in the rotary shell in a penetrating mode, a sealing piece and a bearing piece are arranged between the rotary shell and the connecting shaft, and the sealing piece comprises a rotary seal. The rotary seal comprises a sliding ring, two containing grooves are formed in the inner wall of the sliding ring, O-shaped rings are arranged in the containing grooves, two grooves are formed in the outer wall of the sliding ring, and channels are formed in the bottoms of the grooves and communicated with the outside. The slip ring is arranged in the rotary joint, the two O-shaped rings are arranged on the inner wall of the slip ring to enhance the sealing effect, and the two grooves are formed in the outer wall of the slip ring to receive or release oil under high pressure and low pressure, enhance the lubricating effect and reduce friction force; according to the utility model, the plurality of L-shaped grooves are arranged, so that bearings can be conveniently mounted, and the rotating effect is good.

Description

TECHNICAL FIELD

[0001] The utility model relates to a rotary joint, specifically a rotary joint. BACKGROUND

[0002] The rotary joint is a kind of closed rotary connector of 360 ° rotation conveying medium, and it is matched with slip ring to realize rotation and sealing.Currently, the slip ring of rotary joint is an annular structure opening installation O ring, and there is great friction when rotating, and the friction will affect rotation, and the sealing effect of the installation of one O ring of slip ring is not good. CONTENT OF UTILITY MODEL

[0003] To solve the defects of the prior art, the utility model provides a kind of rotary joint, the utility model can improve lubricating effect by being provided with recess in the outside of slip ring, and the friction is small, and the sealing effect is good by being provided with two O rings in the inside.

[0004] To realize the above technical purpose, the utility model adopts the following technical scheme: a kind of rotary joint, including rotary shell and connecting shaft, the head of the connecting shaft is arranged in the inside of the rotary shell, and sealing element, bearing element are arranged between the rotary shell and the connecting shaft, and the sealing element includes rotary seal;

[0005] The rotary seal includes slip ring, the inner wall of the slip ring is provided with two accommodating grooves, the accommodating groove is provided with O ring, the outer wall of the slip ring is provided with two recesses, and the bottom of the recess is provided with passage to communicate with the outside.

[0006] The connecting shaft is provided with oil port, the rotary shell is provided with annular oil cavity in the inside, and the annular oil cavity is located at the outside of the oil port.

[0007] The connecting shaft is divided into two sections with the oil port as boundary line, the length of first section is less than second section, first section is inserted into the inside of the rotary shell, the end of the first section is provided with L-shaped groove and is provided with the bearing element, and the second section is located in the inside of the connecting shaft, and the outer periphery of the second section is provided with extended convex section, and L-shaped groove is formed at both ends of the convex section and is provided with the bearing element.

[0008] The bearing element includes first bearing, second bearing and third bearing, the first bearing and the second bearing are respectively located at the L-shaped groove formed at both ends of the convex section, and the third bearing is located at the L-shaped groove formed at the end of the first section.

[0009] The sealing element further includes first sealing ring and second sealing ring, the inner wall of the rotary shell is provided with two inner grooves, the first sealing ring and the second sealing ring are respectively placed in the two inner grooves, the first sealing ring is located on the convex section, and the second sealing ring is located on the first section and is located outside the third bearing.

[0010] Therefore, the utility model discloses the following technical effects are achieved:

[0011] The utility model discloses the inside setting slip ring of swivel joint, the inner wall of slip ring sets up two O -rings, strengthens the sealing effect, and the outer wall sets up two recess, can receive or release oil under high pressure low pressure, enhances lubricating effect, reduces friction force;

[0012] The utility model discloses the setting multiple L type groove can very conveniently install bearing, and the rotation effect is good. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a swivel joint schematic diagram;

[0014] Figure 2 It is the rotary seal schematic diagram. DETAILED DESCRIPTION

[0015] The utility model will be further explained in detail in combination with the drawings.

[0016] The embodiment is only the explanation of the utility model, and it is not the limitation of the utility model, and the person skilled in the art can make the modification of no creative contribution according to the need after reading the specification, but as long as in the utility model's right claim range all receive the patent law's protection.

[0017] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0018] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more features. In the description of the utility model, the meaning of "multiple" is two or more than two, unless otherwise specifically limited.

[0019] In the utility model, unless another definite provision and limitation, the terms "mount", "link", "connect", "fix" and so on should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be direct connection, also can indirectly connect through intermediate medium, can be the communication of two elements or the interaction of two elements.For the ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0020] In the utility model, unless another definite provision and limitation, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium.Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the second feature, or just indicate that the first feature is higher than the second feature in horizontal height.The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the second feature, or just indicate that the first feature is lower than the second feature in horizontal height.

[0021] Embodiment:

[0022] Figure 1 It is a swivel joint schematic diagram, including rotating shell 1 and connecting shaft 2, the head of connecting shaft 2 is arranged in the inside of rotating shell 1, and sealing element, bearing element are arranged between rotating shell 1 and connecting shaft 2.Sealing element is used to realize sealing, and bearing element is used to provide the rotation between rotating shell 1 and connecting shaft 2.

[0023] The connecting shaft 2 is provided with an oil port, and the rotating shell 1 is provided with an annular oil cavity 11 inside the rotating shell 1, the annular oil cavity 11 is located outside the oil port and is used for oil guiding.The annular oil cavity 11 can accommodate oil, and the oil guiding effect is better.

[0024] The connecting shaft 2 is divided into two sections with the oil port as a boundary, the length of the first section is less than that of the second section, the first section extends into the rotating shell 1, and the end of the first section is provided with an L-shaped groove and is provided with the bearing element, and the second section is located in the connecting shaft 2, and the outer periphery of the second section is provided with an extended protruding section 21, and the both ends of the protruding section 21 are formed with L-shaped grooves and are respectively provided with the bearing element.

[0025] The bearing element includes a first bearing 5, a second bearing 6 and a third bearing 9, the first bearing 5 and the second bearing 6 are respectively located at the L-shaped grooves formed at the both ends of the protruding section 21, and the third bearing 9 is located at the L-shaped groove formed at the end of the first section.

[0026] The utility model discloses a small diameter section is arranged at the first section end of connecting shaft 2, forms L type groove for installing third bearing 9, and the both ends of the convex section 21 of the second section are installed first bearing 5, second bearing 6 respectively, and three bearings reduce friction together for rotating shell 1, and the smoothness of rotation is better, and the working performance of rotary joint is improved.

[0027] The utility model discloses set up multiple L type grooves can better install bearing, make convenient processing, convenient installation.

[0028] The sealing piece includes first sealing ring 4, second sealing ring 7, rotating seal 3, two inner grooves are set up in the inner wall of rotating shell 1, first sealing ring 4 and second sealing ring 7 are placed in the two inner grooves respectively, first sealing ring 4 is located on convex section 21, and second sealing ring 7 is located on the first section and is located the outside of third bearing 9.

[0029] Figure 2 It is rotating seal schematic diagram, rotating seal 3 includes slip ring 30, the inner wall of slip ring 30 is set up with two accommodating grooves 32, O-shaped ring 33 is arranged in accommodating groove 32, the outer wall of slip ring 30 is set up with two recesses 31, and the bottom of recess 31 is set up with passageway 34 and is connected with the outside.

[0030] Two O-shaped rings 33 can enhance the sealing property, prevent leakage, and accommodating groove 32 and recess 31 are staggered structures, prevent the decrease of intensity, passageway 34 can let liquid in and out recess 31 when high pressure or low pressure, receive or release oil, receive oil can pre-lubrication, release oil can prevent leakage, and two recesses 31 improve lubricating effect.

[0031] The above only is to the preferred implementation of the utility model of the utility model, and is not to the utility model make any form on the limitation, and any simple modification, equivalent change and modification of the above embodiment according to the technical essence of the utility model, all belong to the range of the utility model technical scheme.

Claims

1. A rotary joint, characterized by: The utility model provides a rotary shell (1) and connecting axle (2) are included, the head of connecting axle (2) is worn in the inside of rotary shell (1), and the rotary shell (1) is provided with sealing element, bearing element between connecting axle (2), and the sealing element includes rotary seal (3); The rotary seal (3) includes a slip ring (30) having two accommodating grooves (32) formed in the inner wall of the slip ring (30), and an O-ring (33) is arranged in each of the accommodating grooves (32); the outer wall of the slip ring (30) is provided with two grooves (31), and the bottom of each of the grooves (31) is provided with a passage (34) in communication with the outside.

2. A rotary joint according to claim 1, characterized in that: The connecting axle (2) is provided with an oil port, and the rotary shell (1) is internally provided with an annular oil cavity (11) located outside the oil port.

3. A rotary joint according to claim 2, characterised in that: The connecting axle (2) is divided into two sections by the oil port, and the length of the first section is less than that of the second section; the first section extends into the rotary shell (1), and the end of the first section is provided with an L-shaped groove and is arranged with the bearing element; the second section is located in the connecting axle (2), and the outer periphery of the second section is provided with an extended protruding section (21), and the two ends of the protruding section (21) are formed with L-shaped grooves and are respectively arranged with the bearing element.

4. A rotary joint according to claim 3, characterised in that: The bearing element includes a first bearing (5), a second bearing (6) and a third bearing (9); the first bearing (5) and the second bearing (6) are respectively arranged at the L-shaped grooves formed at the two ends of the protruding section (21); and the third bearing (9) is arranged at the L-shaped groove formed at the end of the first section.

5. A rotary joint according to claim 4, characterised in that: The sealing element further includes a first sealing ring (4) and a second sealing ring (7); the inner wall of the rotary shell (1) is provided with two inner grooves; the first sealing ring (4) and the second sealing ring (7) are respectively arranged in the two inner grooves; the first sealing ring (4) is arranged on the protruding section (21); and the second sealing ring (7) is arranged on the first section and is located outside the third bearing (9).

Images