A rotational joint assembly

Abstract

The utility model discloses a kind of rotary joint assemblies, comprising: first connecting piece, first connecting piece is equipped with first rotating part, first rotating part has at least part of cylindrical outer surface;Second connecting piece, first connecting piece is equipped with second rotating part, second rotating part is equipped with the cylindrical inner surface matched with cylindrical outer surface, to make second connecting piece around the central axis of cylindrical outer surface relatively first connecting piece rotation setting;Pressure mechanism, with first rotating part or second rotating part contact, for drive cylindrical outer surface along its radial abuts on cylindrical inner surface.The above rotary joint assembly with cylindrical outer surface central axis as the rotation axis of first connecting piece and second connecting piece relative rotation, by pressure mechanism make that the relative pressure of radial direction between cylindrical outer surface and cylindrical inner surface, when first connecting piece and second connecting piece relatively rotate, cylindrical outer surface and cylindrical inner surface contact in large area and provide larger rotation resistance, suitable for large load working condition.

Description

Technical Field

[0001] This utility model relates to a rotating joint assembly. Background Technology

[0002] In various technical fields, it is often necessary to assemble two parts together using a rotating connection. The two parts must be stable after adjusting their relative angles to resist torsional forces and prevent easy relative rotation. For example, consider a folding leg for photographic equipment. The folding leg includes a first rod and a second rod rotatably connected to the first rod. A common practice is to have a disc-shaped first joint at one end of the first rod and a disc-shaped second joint at one end of the second rod. A fastening bolt is inserted between the first and second joints to create planar pressure, which is then converted into friction to prevent relative rotation.

[0003] However, such a rotating connection structure provides a small maximum friction force and has extremely poor torsional resistance. In some related technologies, multiple first joints and multiple second joints are alternately arranged in the axial direction of the fastening bolt to increase the friction force by increasing the contact area. However, this still does not change the fact that the contact surface cannot form sufficient friction force in the clockwise direction of the torque, so it cannot be applied to situations with large loads. Utility Model Content

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one of the objectives of the present invention is to provide a rotary joint assembly capable of providing greater rotational resistance and suitable for heavy load conditions.

[0005] A rotating joint assembly according to an embodiment of the present invention includes: a first connector having a first rotating portion having at least a portion of a cylindrical outer surface; a second connector having a second rotating portion having at least a portion of a cylindrical inner surface that mates with the cylindrical outer surface, such that the second connector is rotatably disposed relative to the first connector about the central axis of the cylindrical outer surface; and a pressure mechanism in contact with the first rotating portion or the second rotating portion for driving the cylindrical outer surface to abut against the cylindrical inner surface radially thereafter.

[0006] The rotary joint assembly according to the embodiments of the present invention has at least the following beneficial effects:

[0007] The above-mentioned rotating joint assembly uses the central axis of the outer surface of the cylinder as the axis of rotation for the relative rotation of the first connector and the second connector. Both the outer surface of the cylinder and the inner surface of the cylinder are arranged around this axis. Through the pressure mechanism, a radial relative pressure is formed between the outer surface of the cylinder and the inner surface of the cylinder. When the first connector and the second connector rotate relative to each other, there is a large area of ​​contact between the outer surface of the cylinder and the inner surface of the cylinder, forming a large frictional force to resist torque. This can provide a large rotational resistance and is suitable for heavy load conditions.

[0008] In some embodiments of this utility model, the first rotating part is a cylinder movably connected to the first connecting member, and the second rotating part is a cylindrical sleeve fitted outside the cylinder. The inner diameter of the cylindrical sleeve is consistent with the outer diameter of the cylinder. The pressure mechanism is connected between the first connecting member and the cylinder to drive the cylinder to move radially along the outer surface of the cylinder and then fix it.

[0009] In some embodiments of this utility model, the outer peripheral wall of the cylindrical sleeve is provided with a clearance through hole arranged around its circumference, the pressure mechanism includes a fastening screw connected between the cylinder and the first connecting member and passing through the clearance through hole, the first connecting member or the cylinder is provided with a fastening nut that cooperates with the fastening screw, and the first connecting member is provided with a pressing member that abuts against the cylindrical sleeve or the second connecting member in a direction parallel to the fastening screw.

[0010] In some embodiments of this utility model, the cylinder is provided with an installation channel that is opposite to the clearance hole along its radial direction. The end of the installation channel away from the first connector is provided with a countersunk hole that matches the head of the fastening screw. The first connector is provided with an assembly channel through which the shank of the fastening screw passes. The fastening nut is tightened onto the shank of the fastening screw and abuts against the first connector.

[0011] In some embodiments of this utility model, a first washer is provided on the fastening screw and abuts against the end face of the fastening nut, and a compression spring is provided on the fastening screw and abuts against the first washer and the first connecting member.

[0012] In some embodiments of this utility model, the clearance perforation is an arc-shaped groove arranged axially around the cylindrical sleeve, and the width of the arc-shaped groove is consistent with the diameter of the rod portion of the fastening screw.

[0013] In some embodiments of this utility model, the clamping member is disposed between the first connecting member and the cylinder, the clamping member has an arc-shaped concave part that fits against the outer surface of the cylinder, the clamping member has a through hole for the fastening screw to pass through, and the arc-shaped concave part and the cylinder together clamp a part of the cylindrical sleeve.

[0014] In some embodiments of this utility model, the tightening member and the first connecting member are an integral structure, or the tightening member and the first connecting member are separate structures.

[0015] In some embodiments of this utility model, the first connecting member is a first rod, the cylinder extends radially along the first rod, the length of the cylinder matches the diameter of the first rod, and the center of the cylinder is located on the central axis of the first rod; the second connecting member is a second rod, the cylindrical sleeve extends radially along the second rod, the length of the cylindrical sleeve matches the diameter of the second rod, and the center of the cylindrical sleeve is located on the central axis of the second rod.

[0016] In some embodiments of this utility model, the first rod includes a first sleeve and a mounting seat threaded to the end of the first sleeve. The tightening member and the mounting seat are separate structures. The tightening member is placed on the mounting seat. The fastening screw passes through the cylinder, the cylindrical sleeve, the tightening member and the mounting seat in sequence.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0019] Figure 1 This is a schematic diagram of the structure of a first embodiment of the rotary joint assembly of this utility model;

[0020] Figure 2 for Figure 1 A cross-sectional schematic diagram of an embodiment;

[0021] Figure 3 for Figure 1 Schematic diagram of the structure breakdown of the embodiment

[0022] Figure 4 This is a cross-sectional schematic diagram of a second embodiment of the rotary joint assembly of this utility model.

[0023] Figure label:

[0024] First connector 100; first sleeve 101; mounting base 102; cylinder 110; outer surface of cylinder 111; mounting channel 112; countersunk hole 113; second connector 200; cylindrical sleeve 210; inner surface of cylinder 211; clearance through hole 212; pressure mechanism 300; fastening screw 310; fastening nut 320; first washer 330; clamping member 400; arc concave part 410; through hole 420; compression spring 500. Detailed Implementation

[0025] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0026] In the description of this utility model, it should be understood that the directional descriptions, such as the terms "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] See Figures 1 to 3A rotating joint assembly according to an embodiment of the present invention includes: a first connector 100, the first connector 100 having a first rotating portion having at least a portion of a cylindrical outer surface 111; a second connector 200, the first connector 100 having a second rotating portion having at least a portion of a cylindrical inner surface 211 that cooperates with the cylindrical outer surface 111, so that the second connector 200 is rotatably disposed relative to the first connector 100 about the central axis of the cylindrical outer surface 111; and a pressure mechanism 300, in contact with the first rotating portion or the second rotating portion, for driving the cylindrical outer surface 111 to abut against the cylindrical inner surface 211 radially.

[0030] The above-mentioned rotating joint assembly uses the central axis of the outer surface 111 of the cylinder as the axis of rotation for the relative rotation of the first connector 100 and the second connector 200. The outer surface 111 of the cylinder and the inner surface 211 of the cylinder are both arranged around this axis. The pressure mechanism 300 makes a radial relative pressure between the outer surface 111 of the cylinder and the inner surface 211 of the cylinder. When the first connector 100 and the second connector 200 rotate relative to each other, the outer surface 111 of the cylinder and the inner surface 211 of the cylinder have a large contact area and form a large frictional force to resist torque, which can provide a large rotational resistance and is suitable for heavy load conditions.

[0031] See Figure 1 , Figure 2 and Figure 3In some embodiments of this utility model, the first rotating part is a cylinder 110 movably connected to the first connecting member 100, and the second rotating part is a cylindrical sleeve 210 sleeved on the outside of the cylinder 110. The inner diameter of the cylindrical sleeve 210 is the same as the outer diameter of the cylinder 110. The pressure mechanism 300 is connected between the first connecting member 100 and the cylinder 110 to drive the cylinder 110 to move radially along the outer surface 111 of the cylinder and then fix it. It can be understood that the outer circumferential surface of the cylinder 110 constitutes the outer surface 111 of the cylinder, and the inner circumferential surface of the cylindrical sleeve 210 constitutes the inner surface 211 of the cylinder. The cooperation between the cylinder 110 and the cylindrical sleeve 210 not only has a large contact area, but also facilitates greater stability when the first connecting member 100 and the second connecting member 200 rotate relative to each other, preventing the problem of relative movement between the two in the radial direction. By configuring the cylinder 110 to be movable relative to the first rotating part, a larger radially outward contact pressure can be generated on the cylindrical sleeve 210 by slightly adjusting the position of the cylinder 110, thereby increasing the static friction between the cylinder 110 and the cylindrical sleeve 210. Alternatively, in other embodiments, the cylindrical sleeve 210 can also be configured to be movable relative to the second rotating part, and a larger radially inward contact pressure can be generated on the cylinder 110 by slightly adjusting the position of the cylindrical sleeve 210.

[0032] See Figure 1 and Figure 3 In some embodiments of this utility model, the outer peripheral wall of the cylindrical sleeve 210 is provided with a clearance hole 212 arranged around its circumference. The pressure mechanism 300 includes a fastening screw 310 connected between the cylinder 110 and the first connecting member 100 and passing through the clearance hole 212. The first connecting member 100 or the cylinder 110 is provided with a fastening nut 320 that cooperates with the fastening screw 310. The first connecting member 100 is provided with a tightening member 400 that abuts against the cylindrical sleeve 210 or the second connecting member 200 in a direction parallel to the fastening screw 310. Understandably, when the user rotates the fastening screw 310, the clamping member 400 abuts against the cylindrical sleeve 210 or the second connecting member 200, allowing the cylinder 110 to feed along the length of the fastening screw 310. This causes the cylinder 110 to generate a radially outward abutting force against the cylindrical sleeve 210, achieving a tight fit between the cylinder 110 and the cylindrical sleeve 210. When the first connecting member 100 rotates relative to the second connecting member 200, the fastening screw 310 can swing along the extension direction of the clearance hole 212 without affecting the relative rotation of the first connecting member 100 and the second connecting member 200 to achieve angle adjustment.

[0033] See Figure 2 and Figure 3In some embodiments of this utility model, the cylinder 110 is provided with an installation channel 112 that is opposite to the clearance hole 212 along its radial direction. The end of the installation channel 112 away from the first connector 100 is provided with a countersunk hole 113 that matches the head of the fastening screw 310. The first connector 100 is provided with an assembly channel through which the rod of the fastening screw 310 passes. The fastening nut 320 is tightened onto the rod of the fastening screw 310 and abuts against the first connector 100. It is conceivable that when assembling the cylinder 110 and the first connector 100 together, the fastening screw 310 passes through the mounting channel 112, the clearance hole 212 and the assembly channel. At this time, the head of the fastening screw 310 is located in the countersunk hole 113, and the fastening nut 320 is tightened on the end of the fastening screw 310 to achieve a tight fit between the cylinder 110 and the cylindrical sleeve 210. The above structure can effectively improve the structural compactness of the rotating joint assembly of this utility model, reduce the number of parts, and simplify the manufacturing process.

[0034] See Figure 4 In some embodiments of this utility model, to facilitate the adjustment and control of the torque required to drive the first connecting member 100 and the second connecting member 200 to rotate relative to each other, a first washer 330 is provided on the fastening screw 310, abutting against the end face of the fastening nut 320, and a compression spring 500 is provided on the fastening screw 310, abutting against the first washer 330 and the first connecting member 100. By turning the fastening screw 310, the compression amount of the compression spring 500 can be adjusted, thereby adjusting the radial pressure of the cylinder 110 on the cylindrical sleeve 210, and thus adjusting the torque required for rotation.

[0035] See Figure 2 and Figure 3 In some embodiments of this utility model, in order to prevent the cylinder 110 and the cylindrical sleeve 210 from moving relative to each other along the axial direction and to improve the stability and reliability of the first connector 100 and the second connector 200 when rotating relative to each other, the clearance hole 212 is an arc-shaped groove arranged around the cylindrical sleeve 210 along the axial direction. The width of the arc-shaped groove is consistent with the diameter of the rod of the fastening screw 310, thereby playing a role in rotation guidance.

[0036] See Figures 1 to 3In a preferred embodiment of the present invention, the clamping member 400 is disposed between the first connecting member 100 and the cylinder 110. The clamping member 400 has an arc-shaped concave portion 410 that fits against the outer surface 111 of the cylinder. The clamping member 400 has a through hole 420 for the fastening screw 310 to pass through. The arc-shaped concave portion 410 and the cylinder 110 together clamp a part of the cylindrical sleeve 210. It should be noted that, with the cooperation of the fastening screw 310 and the fastening nut 320, the cylinder 110 is tightly fitted with the cylindrical sleeve 210, the clamping member 400 is tightly fitted with the cylindrical sleeve 210, and a large area of ​​contact is also formed between the arc concave part 410 and the outer peripheral wall of the cylindrical sleeve 210. When the first connecting member 100 and the second connecting member 200 rotate relative to each other, the friction between the arc concave part 410 and the cylindrical sleeve 210 and the friction between the cylinder 110 and the cylindrical sleeve 210 together prevent the first connecting member 100 and the second connecting member 200 from rotating relative to each other, thus achieving a more stable and reliable support effect, which is more suitable for heavy load conditions.

[0037] In some embodiments of this utility model, the clamping member 400 and the first connecting member 100 are integral structures, or the clamping member 400 and the first connecting member 100 are separate structures. It is understood that an integral structure of the clamping member 400 and the first connecting member 100 reduces the number of parts and simplifies the manufacturing process. Separate structures of the clamping member 400 and the first connecting member 100 allow for separate manufacturing processes to ensure processing accuracy, resulting in higher quality products.

[0038] See Figure 1 In some embodiments of this utility model, the first connecting member 100 is a first rod, and the cylinder 110 extends radially along the first rod. The length of the cylinder 110 matches the diameter of the first rod, and the center of the cylinder 110 is located on the central axis of the first rod. The second connecting member 200 is a second rod, and the cylindrical sleeve 210 extends radially along the second rod. The length of the cylindrical sleeve 210 matches the diameter of the second rod, and the center of the cylindrical sleeve 210 is located on the central axis of the second rod. This rotating joint assembly with the above structure, applied between two rods, is widely applicable in the field of photographic equipment, and its overall radial dimension is relatively large, avoiding a bulky structure.

[0039] See Figure 4In some embodiments of this utility model, the first rod includes a first sleeve 101 and a mounting base 102 threaded to the end of the first sleeve 101. The clamping member 400 and the mounting base 102 are separate structures. The clamping member 400 is placed on the mounting base 102. The fastening screw 310 passes sequentially through the cylinder 110, the cylindrical sleeve 210, the clamping member 400, and the mounting base 102. It can be understood that when the first sleeve 101 is rotated, the outer peripheral edge of the clamping member 400 can be clamped and fixed between the mounting base 102 and the cylindrical sleeve 210. The fastening screw 310 clamps and fixes the middle part of the clamping member 400 between the middle part of the mounting base 102 and the cylindrical sleeve 210, which is beneficial to apply a more stable and reliable radial pressure between the cylinder 110 and the cylindrical sleeve 210, thereby improving the rotational resistance.

[0040] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0041] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A rotary joint assembly, characterized in that, include: A first connector (100) is provided with a first rotating part, the first rotating part having at least a portion of a cylindrical outer surface (111); The second connector (200) is provided with the first connector (100) having a second rotating part, the second rotating part having at least a portion of the inner cylindrical surface (211) that cooperates with the outer cylindrical surface (111), so that the second connector (200) is rotatably disposed relative to the first connector (100) about the central axis of the outer cylindrical surface (111); The pressure mechanism (300) is in contact with the first rotating part or the second rotating part and is used to drive the outer surface (111) of the cylinder to abut against the inner surface (211) of the cylinder radially.

2. The rotary joint assembly according to claim 1, characterized in that: The first rotating part is a cylinder (110) movably connected to the first connecting member (100), and the second rotating part is a cylindrical sleeve (210) sleeved on the outside of the cylinder (110). The inner diameter of the cylindrical sleeve (210) is consistent with the outer diameter of the cylinder (110). The pressure mechanism (300) is connected between the first connecting member (100) and the cylinder (110) to drive the cylinder (110) to move radially along the outer surface (111) of the cylinder and then fix it.

3. A rotary joint assembly according to claim 2, characterized in that: The outer peripheral wall of the cylindrical sleeve (210) is provided with a clearance hole (212) arranged around its circumference. The pressure mechanism (300) includes a fastening screw (310) connected between the cylinder (110) and the first connecting member (100) and passing through the clearance hole (212). The first connecting member (100) or the cylinder (110) is provided with a fastening nut (320) that cooperates with the fastening screw (310). The first connecting member (100) is provided with a tightening member (400) that abuts against the cylindrical sleeve (210) or the second connecting member (200) in a direction parallel to the fastening screw (310).

4. A rotary joint assembly according to claim 3, characterized in that: The cylinder (110) has a mounting channel (112) that is opposite to the clearance hole (212) through it radially. The mounting channel (112) has a countersunk hole (113) that matches the head of the fastening screw (310) at one end away from the first connector (100). The first connector (100) has an assembly channel through which the shank of the fastening screw (310) passes. The fastening nut (320) is tightened onto the shank of the fastening screw (310) and abuts against the first connector (100).

5. A rotary joint assembly according to claim 4, characterized in that: A first washer (330) is provided on the fastening screw (310) and abuts against the end face of the fastening nut (320). A compression spring (500) is provided on the fastening screw (310) and abuts against the first washer (330) and the first connector (100).

6. A rotary joint assembly according to claim 3, characterized in that: The clearance perforation (212) is an arc-shaped groove arranged axially around the cylindrical sleeve (210), and the width of the arc-shaped groove is consistent with the diameter of the rod of the fastening screw (310).

7. A rotary joint assembly according to claim 3, characterized in that: The clamping member (400) is disposed between the first connecting member (100) and the cylinder (110). The clamping member (400) has an arc concave part (410) that fits against the outer surface (111) of the cylinder. The clamping member (400) has a through hole (420) for the fastening screw (310) to pass through. The arc concave part (410) and the cylinder (110) together clamp a part of the cylindrical sleeve (210).

8. A rotary joint assembly according to claim 7, characterized in that: The clamping member (400) and the first connecting member (100) are an integral structure, or the clamping member (400) and the first connecting member (100) are separate structures.

9. A rotary joint assembly according to claim 7, characterized in that: The first connector (100) is a first rod, and the cylinder (110) extends radially along the first rod. The length of the cylinder (110) matches the diameter of the first rod, and the center of the cylinder (110) is located on the central axis of the first rod. The second connector (200) is a second rod, and the cylindrical sleeve (210) extends radially along the second rod. The length of the cylindrical sleeve (210) matches the diameter of the second rod, and the center of the cylindrical sleeve (210) is located on the central axis of the second rod.

10. A rotary joint assembly according to claim 9, characterized in that: The first rod includes a first sleeve (101) and a mounting seat (102) threaded to the end of the first sleeve (101). The tightening member (400) and the mounting seat (102) are separate structures. The tightening member (400) is placed on the mounting seat (102). The fastening screw (310) passes through the cylinder (110), the cylindrical sleeve (210), the tightening member (400) and the mounting seat (102) in sequence.

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