Ball joint earring

Abstract

The application discloses a ball hinge earring, which comprises an earring body, a pull rod, an adjusting sleeve and a locking nut, a bearing mounting hole is formed in the center of the earring body, a slit is formed in the earring body and penetrates into the mounting hole, the slit is parallel to the axis of the bearing mounting hole, the two sides of the slit are respectively provided with oppositely arranged lug one and lug two, a first threaded hole is formed in the lug one, a second threaded hole is formed in the lug two, and the axes of the first threaded hole and the second threaded hole are collinear, the pull rod is arranged in the first threaded hole and the second threaded hole, one end of the pull rod is threadedly connected with the first threaded hole, the other end of the pull rod extends out of the second threaded hole and is threadedly connected with the locking nut, and the locking nut is located on the side of the lug two away from the lug one, and the adjusting sleeve is movably sleeved on the pull rod and is threadedly connected with the outer wall of the second threaded hole, and the ball hinge earring can accurately control the opening or tightening of the slit.

Description

Technical Field

[0001] This invention relates to the field of ball joint technology, and in particular to a ball joint earring. Background Technology

[0002] Ball joints, as a common mechanical connection component, are widely used in the articulation connection between actuators such as hydraulic cylinders and actuators and main equipment. They allow the connecting components to swing and self-align within a certain angle range.

[0003] Existing ball joint structures typically include a ball joint lug, a bearing mounting hole inside the ball joint lug, a bearing assembled in the bearing mounting hole, a ball joint tie rod on the inner ring of the bearing, and the ball joint tie rod rotatably mounted on the hinge seat, thereby enabling the ball joint lug to rotate relative to the hinge seat.

[0004] However, when the ball joint operates under reciprocating fatigue loading conditions, the bearing will inevitably wear, causing the clearance between the inner and outer rings of the bearing to gradually increase during rotation. To compensate for this wear, existing technology involves creating a slit in the ball joint clevis that extends through to the bearing mounting hole. By adjusting the opening of the slit, the ball joint clevis can be elastically deformed, thereby achieving the clamping or loosening adjustment of the bearing.

[0005] Regarding the issue of kerf adjustment, patent application number CN201721395367.3 discloses a backlash-eliminating dynamic loading ball joint, which adopts a structure that eliminates screw engagement rings and adjusts the kerf through preload and reaction force.

[0006] However, this solution has obvious limitations: it can only perform unidirectional clamping by tightening the release screw, and cannot achieve reverse loosening adjustment; its adjustment range is limited by the elastic deformation of the ring, and cannot achieve arbitrary and precise control of the slit opening; this structure is a passive compensation mechanism, and cannot actively and bidirectionally adjust the slit opening according to the working conditions. This unidirectional reciprocating adjustment method is greatly limited in applications requiring high-precision dynamic control.

[0007] Therefore, it is particularly necessary to design a new adjustable gap ball joint lug that can precisely control the opening or tightening of the slit to meet the needs of high-precision dynamic working conditions. Summary of the Invention

[0008] The purpose of this invention is to provide a ball-joint earring that can precisely control the opening or tightening of the slit, addressing the aforementioned problems.

[0009] The technical solution adopted in this invention is as follows:

[0010] A ball-joint earring includes an earring body, a pull rod, an adjusting sleeve, and a locking nut;

[0011] The earring body has a through bearing mounting hole at its center. The earring body has a slit that extends through to the mounting hole. The slit is parallel to the axis of the bearing mounting hole. On both sides of the slit are a lug 1 and a lug 2 that are arranged opposite to each other. The lug 1 has a first threaded hole and the lug 2 has a second threaded hole. The axes of the first threaded hole and the second threaded hole are collinear.

[0012] The pull rod passes through the first threaded hole and the second threaded hole, with one end threadedly connected to the first threaded hole and the other end extending out of the second threaded hole and threadedly connected to the locking nut. The locking nut is located on the side of the lug two away from the lug one.

[0013] The adjusting sleeve is movably sleeved on the pull rod, and its outer wall is threadedly connected to the second threaded hole.

[0014] The slit opening is adjusted by coordinating the adjustment sleeve and the locking nut. When the adjustment sleeve moves toward the first lug and the locking nut moves away from the second lug, the slit can be opened. When the adjustment sleeve moves into the second threaded hole and the locking nut moves toward the second lug, the slit can be tightened.

[0015] Furthermore, the adjusting sleeve has an adjusting hole in the radial direction, and the adjusting hole is located at the end of the adjusting sleeve near the lug one; when the pin is inserted into the adjusting hole, it can drive the adjusting sleeve to rotate.

[0016] Furthermore, a spherical washer and a spherical washer seat are provided between the lug and the adjusting sleeve. The spherical washer and the spherical washer seat are both sleeved on the pull rod, and the spherical washer and the spherical washer seat are in spherical fit.

[0017] Furthermore, the spherical washer seat is positioned near the lug, and the spherical washer is located between the spherical washer seat and the adjusting sleeve.

[0018] Furthermore, a positioning sleeve is installed between the second lug and the locking nut. The positioning sleeve is sleeved on the outside of the pull rod and is fixedly installed on the second lug.

[0019] Furthermore, the second lug is provided with a countersunk hole on the side end face opposite to the first lug, and the positioning sleeve is installed in the countersunk hole.

[0020] Furthermore, a washer is provided between the positioning sleeve and the locking nut, and the washer is sleeved on the pull rod.

[0021] Furthermore, the locking nut is provided with a threaded hole, in which a screw is installed. The axis of the screw is parallel to the axis of the pull rod, and the end of the screw abuts against the surface of the washer away from the positioning sleeve.

[0022] Furthermore, the number of threaded holes is at least two, and each threaded hole is evenly distributed in the circumferential direction of the locking nut.

[0023] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0024] This invention employs a combination structure of a pull rod, an adjusting sleeve, and a locking nut. The adjusting sleeve and the locking nut work together to control the opening and tightening of the slit in both directions, overcoming the limitation of existing technologies that can only clamp in one direction. This allows for arbitrary and precise control of the slit opening, thereby flexibly adjusting the bearing assembly clearance. Attached Figure Description

[0025] Figure 1 This is a structural diagram of the present invention;

[0026] Figure 2 Internal structural diagrams of lug 1 and lug 2;

[0027] In the diagram, 1-earring body, 2-hole retaining ring, 3-bearing, 4-lug two, 5-lug one, 6-cut slit, 7-pull rod, 8-spherical washer seat, 9-spherical washer, 10-adjusting sleeve, 11-positioning sleeve, 12-washer, 13-locking nut, 14-screw, 15-adjusting hole. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0030] It should be noted that, unless otherwise specified, the embodiments and features described in this invention can be combined with each other.

[0031] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0032] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are used only for the convenience of describing this invention 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, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0033] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" 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 invention based on the specific circumstances.

[0034] like Figure 1 and 2 As shown, this invention discloses a ball joint earring, including an earring body 1, a pull rod 7, an adjusting sleeve 10, and a locking nut 13; the earring body 1 has a through bearing mounting hole at its center, and a bearing 3 is installed in the bearing mounting hole; the earring body 1 has a through slit 6 extending to the mounting hole, and the slit 6 is parallel to the axis of the bearing mounting hole; two opposite lugs 5 and 4 are respectively provided on both sides of the slit 6; the lug 5 has a first threaded hole, and the lug 4 has a second threaded hole, and the axes of the first threaded hole and the second threaded hole are collinear; the pull rod 7 passes through the first threaded hole and the second threaded hole, and one end of its pull rod is threaded into the first threaded hole. The first end is threaded, and the second end extends out of the second threaded hole and is threadedly connected to the locking nut 13. The locking nut 13 is located on the side of the lug 2 4 away from the lug 1 5. The adjusting sleeve 10 is movably sleeved on the pull rod 7, and its outer wall is threadedly connected to the second threaded hole. There is a gap of 2~3mm between the inner hole of the adjusting sleeve 10 and the pull rod 7. The opening of the slit 6 is adjusted by coordinating the operation of the adjusting sleeve 10 and the locking nut 13. When the adjusting sleeve 10 moves towards the lug 1 5 and the locking nut 13 moves away from the lug 2 4, the slit 6 can be opened. When the adjusting sleeve 10 moves into the second threaded hole and the locking nut 13 moves towards the lug 2 4, the slit 6 can be tightened.

[0035] The combination structure of pull rod 7, adjusting sleeve 10 and locking nut 13 is adopted. The adjusting sleeve 10 and locking nut 13 work together to control the opening and tightening of the slit 6 in both directions. This breaks through the limitation of existing technology (patent application number CN201721395367.3) which can only clamp in one direction. It can realize arbitrary and precise control of the opening of the slit 6, thereby flexibly adjusting the assembly gap of the bearing 3.

[0036] Furthermore, the adjusting sleeve 10 is provided with an adjusting hole 15 in the radial direction, and the adjusting hole 15 is located at one end of the adjusting sleeve 10 near the lug 5; when the pin is inserted into the adjusting hole 15, it can drive the adjusting sleeve 10 to rotate.

[0037] An adjustment hole 15 is provided radially on the adjustment sleeve 10, providing a convenient operating point for the rotation of the adjustment sleeve 10. The adjustment sleeve 10 can be easily rotated by inserting a pin, reducing the difficulty of the adjustment operation. The adjustment hole 15 is located at one end close to the lug 5, avoiding interference with other components, ensuring a smooth adjustment process, and improving the operational efficiency of the slit 6 adjustment.

[0038] Furthermore, a spherical washer 9 and a spherical washer seat 8 are provided between the lug 5 and the adjusting sleeve 10. The spherical washer 9 and the spherical washer seat 8 are both sleeved on the pull rod 7, and the spherical washer 9 and the spherical washer seat 8 are in spherical fit; the spherical washer 9 and the spherical washer seat 8 are in clearance fit with the pull rod 7.

[0039] In this invention, the spherical fit between the spherical washer 9 and the spherical washer seat 8 ensures that the force between the adjusting sleeve 10, the spherical washer 9, and the spherical washer seat 8 is always transmitted in a straight line during the opening of the slit 6, thereby ensuring that the adjusting force is evenly applied to both sides of the slit 6 and avoiding local stress concentration.

[0040] In the prior art (patent application number CN201721395367.3), the spherical washer and conical ring are only used to cooperate with the ring sleeve to achieve the balance between preload and reaction force. Their core function is to absorb the load through the deformation of the ring sleeve to protect the backlash-free screw 14, but they cannot solve the problem of force transmission path offset.

[0041] The spherical mating structure of this application can actively compensate for assembly errors and angular offsets, ensuring the linear transmission of force. Compared with the prior art, it can better guarantee adjustment accuracy and structural stability.

[0042] Furthermore, the spherical washer seat 8 is positioned close to the lug 5, and the spherical washer 9 is located between the spherical washer seat 8 and the adjusting sleeve 10.

[0043] Due to the aforementioned positional layout, the linear transmission path of force is further enhanced, enabling the thrust of the adjusting sleeve 10 to be directly and stably transmitted to the lug 5, ensuring that the opening of the slit 6 is precisely controllable.

[0044] Furthermore, a positioning sleeve 11 is installed between the second lug 4 and the locking nut 13. The positioning sleeve 11 is sleeved on the outside of the pull rod 7 and is fixedly installed on the side of the second lug 4 away from the first lug 5. The positioning sleeve 11 is clearance-fitted with the pull rod 7.

[0045] The positioning sleeve 11 can provide radial positioning for the tie rod 7, preventing the tie rod 7 from radially shifting or shaking when under force, thus ensuring stability and reliability during the adjustment process.

[0046] Furthermore, a washer 12 is provided between the positioning sleeve 11 and the locking nut 13, and the washer 12 is sleeved on the pull rod 7 and has a clearance fit with the pull rod 7.

[0047] The presence of the shim 12 increases the contact area between the locking nut 13 and the positioning sleeve 11, disperses the pressure applied by the locking nut 13, and prevents the positioning sleeve 11 or the lug 4 from deforming due to excessive local stress. The shim 12 can also reduce the direct friction between the locking nut 13 and the positioning sleeve 11, and reduce component wear.

[0048] Furthermore, the locking nut 13 has a threaded hole, and a screw 14 is installed in the threaded hole. The axis of the screw 14 is parallel to the axis of the pull rod 7, and the end of the screw 14 abuts against the washer 12.

[0049] By abutting the end of the screw 14 against the washer 12, the rotational tendency of the locking nut 13 caused by vibration under working conditions can be counteracted, thereby preventing relative rotation between the locking nut 13 and the pull rod 7 and avoiding loosening. The parallel arrangement of the axis of the screw 14 and the axis of the pull rod 7 ensures that the pressure of the screw 14 on the washer 12 is evenly distributed, preventing the washer 12 from being unbalanced.

[0050] Furthermore, the number of threaded holes is at least two, and each threaded hole is evenly distributed in the circumferential direction of the locking nut 13.

[0051] Furthermore, a retaining ring 2 for the bearing mounting hole is also provided inside the bearing mounting hole.

[0052] A retaining ring 2 is installed in the bearing mounting hole to provide axial positioning for the bearing 3 assembled in the bearing mounting hole.

[0053] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A ball joint earring, characterized by: The ear ring body (1), the pull rod (7), the adjusting sleeve (10) and the locking nut (13) are included. The ear ring body (1) is provided with a bearing mounting hole in the center, and a slit (6) is provided on the ear ring body (1) and penetrates into the mounting hole, the slit (6) is parallel to the axis of the bearing mounting hole, and the two sides of the slit (6) are respectively provided with oppositely arranged lug one (5) and lug two (4), the first threaded hole is provided on the lug one (5), the second threaded hole is provided on the lug two (4), and the axes of the first threaded hole and the second threaded hole are collinear. The pull rod (7) is provided in the first threaded hole and the second threaded hole, one end of the pull rod (7) is threadedly connected with the first threaded hole, the other end of the pull rod (7) extends out of the second threaded hole and is threadedly connected with the locking nut (13), and the locking nut (13) is located on the side of the lug two (4) away from the lug one (5). The adjusting sleeve (10) is movably sleeved on the pull rod (7), and the outer wall of the adjusting sleeve (10) is threadedly connected with the second threaded hole. The slit (6) is adjusted by cooperatively operating the adjusting sleeve (10) and the locking nut (13), when the adjusting sleeve (10) moves towards the lug one (5), and the locking nut (13) moves away from the lug two (4), the slit (6) can be expanded, when the adjusting sleeve (10) moves towards the second threaded hole, and the locking nut (13) moves towards the lug two (4), the slit (6) can be tightened.

2. Ball-joint earring according to claim 1, characterized in that: The adjusting sleeve (10) is provided with an adjusting hole (15) in the radial direction, and the adjusting hole (15) is located at one end of the adjusting sleeve (10) close to the lug one (5); when the pin shaft is inserted into the adjusting hole (15), the adjusting sleeve (10) can be rotated.

3. The ball-joint earring of claim 1, wherein: The lug one (5) and the adjusting sleeve (10) are provided with a spherical washer (9) and a spherical washer seat (8), the spherical washer (9) and the spherical washer seat (8) are sleeved on the pull rod (7), and the spherical washer (9) and the spherical washer seat (8) are spherical matched.

4. The ball-joint earring of claim 3, wherein: The spherical washer seat (8) is located close to the lug one (5), and the spherical washer (9) is located between the spherical washer seat (8) and the adjusting sleeve (10).

5. The ball-joint earring of claim 1, wherein: The lug two (4) and the locking nut (13) are provided with a positioning sleeve (11), the positioning sleeve (11) is sleeved on the pull rod (7), and the positioning sleeve (11) is fixedly installed on the side of the lug two (4) away from the lug one (5).

6. The ball-joint earring of claim 5, wherein: The positioning sleeve (11) and the locking nut (13) are provided with a gasket (12), and the gasket (12) is sleeved on the pull rod (7).

7. The ball-joint earring of claim 6, wherein: The locking nut (13) is provided with a threaded hole, a screw (14) is installed in the threaded hole, the axis of the screw (14) is parallel to the axis of the pull rod (7), and the end of the screw (14) abuts against the gasket (12).

8. The ball-joint earring of claim 7, wherein: The number of the threaded holes is at least two, and each threaded hole is uniformly distributed in the circumferential direction of the locking nut (13).

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