Multi-angle adjustable ball joint mechanism

Abstract

The application provides a multi-angle adjusting ball joint mechanism, which comprises a ball and a shell capable of containing the ball, a ball handle is arranged on the upper portion of the ball, a U-shaped gap for avoiding the ball handle is arranged on one side of the upper end of the shell, an elastic device is further arranged in the shell, and a base is arranged on the lower end of the shell; a convex circular table is arranged in the middle of the upper end face of the upper cover, a conical surface or an arc surface is formed between the periphery of the circular table and the upper end face of the upper cover; the ball is a hollow structure and is provided with a large circular hole in the lower portion, a guide shaft and a movable cover capable of moving up and down along the guide shaft are arranged in the ball, the movable cover is provided with a hollow tube matched with the guide shaft, springs are arranged on the outer periphery of the guide shaft and the hollow tube, the elastic force of the springs is smaller than the elastic force of the elastic device, the movable cover is in clearance fit with the large circular hole, and the outer side face of the movable cover is a spherical surface. When the ball is deflected by about 90 degrees to the U-shaped gap, the springs in the ball will push the movable cover to move outward, so that the spherical surface of the movable cover and the ball form a complete spherical shape.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ball joint, in particular to a multi-angle adjustable ball joint mechanism. BACKGROUND

[0002] Ball joint is a common mechanical structure, which can enable the object installed thereon to realize free swinging and rotating in multiple directions. For example, the holder for installing camera and video camera is a typical ball joint. The ball joint is usually composed of a shell with a spherical mounting groove and a ball body movably installed in the shell.

[0003] The description of Chinese invention patent No. 2023219062485 discloses a ball joint mechanism capable of automatic return, which comprises a ball body and a shell capable of accommodating the ball body. The upper part of the ball body is provided with a vertical ball handle. The shell is internally provided with a ball holder, an elastic member and a support member. The ball holder is used to support the ball body. The support member provides elastic support to the ball holder through the elastic member. The lower part of the ball body forms a horizontal section. One side of the upper end of the shell is provided with a U-shaped notch for avoiding the ball handle, so that the ball body can be deflected by about 90° relative to the shell. However, since the ball body is not a complete spherical shape, when the ball body is deflected by about 90° to the U-shaped notch, the horizontal section at the lower part of the ball body will be exposed, and the user can obviously see a crescent-shaped gap between the ball body and the shell, which not only greatly affects the appearance, but also is easy to drop into sundries. SUMMARY

[0004] The technical problem to be solved by the present application is to provide a multi-angle adjustable ball joint mechanism with an attractive and reliable structure.

[0005] To solve the above technical problems, the technical scheme of the present application is as follows: a multi-angle adjustable ball joint mechanism, which comprises a ball body and a shell capable of accommodating the ball body. The upper part of the ball body is provided with a ball handle. One side of the upper end of the shell is provided with a U-shaped notch for avoiding the ball handle. An elastic device is also installed in the shell. The elastic device comprises an upper cover, an elastic member and a lower cover from top to bottom. The lower end of the shell is provided with a base. The middle part of the upper end surface of the upper cover is provided with a convex circular table. A conical surface or an arc surface is formed between the periphery of the circular table and the upper end surface of the upper cover. The ball body is a hollow structure and has a large circular hole at the lower part. A guide shaft and a movable cover capable of moving up and down along the guide shaft are arranged in the ball body. The movable cover has a hollow tube matched with the guide shaft. A small spring is sleeved on the outer periphery of the guide shaft and the hollow tube. The elastic force of the small spring is smaller than that of the elastic member. The movable cover and the large circular hole are in clearance fit. The outer side surface of the movable cover is a spherical surface.

[0006] In the above technical solution, the ball has a guide shaft and a movable cover which can move up and down along the guide shaft, the movable cover has a hollow tube which matches the guide shaft, a small spring is arranged around the guide shaft and the hollow tube, the elastic force of the small spring is smaller than that of the elastic member, when the handle of the ball is in the vertical state, the upper cover of the elastic device is pushed into the ball under the action of the elastic member, when the ball is deflected about 90 degrees to the U-shaped gap, the small spring in the ball pushes the movable cover to move outward, so that the spherical surface of the movable cover can form a complete spherical shape with the ball.

[0007] Further, the ball is made of aluminum alloy, and a stainless steel bushing is embedded in the large hole of the ball. Since the periphery of the large hole often contacts and rubs with the upper cover during rotation of the ball, the embedded stainless steel bushing can increase the wear resistance.

[0008] The upper cover can move up and down in the shell, and the position of the lower cover in the shell is adjustable or non-adjustable.

[0009] In one embodiment, the lower end surface of the upper cover is provided with a guide sleeve, and the upper end surface of the lower cover is provided with a guide column which can be inserted into the guide sleeve.

[0010] In one embodiment, the outer periphery of the upper cover is provided with a downwardly extending ball shaft sleeve which is in contact with the inner wall of the shell.

[0011] In one embodiment, a wedge is arranged below the lower cover, the middle part of the wedge is transversely provided with a screw hole, the wedge is transversely installed on an adjusting screw rod through the screw hole, both ends of the adjusting screw rod are rotatably installed on the shell, the lower surface of the wedge is a flat surface, the upper surface of the wedge is an inclined surface and at least one inclined groove is arranged on the inclined surface, and the lower surface of the lower cover is provided with an inclined guide rail which is embedded in the inclined groove; when the adjusting screw rod is screwed, the wedge can move left and right along the adjusting screw rod, and the lower cover is forced to move upward in the shell through the action of the inclined groove on the inclined guide rail.

[0012] In one embodiment, the lower cover is installed in the shell by screw connection, the lower surface of the lower cover is provided with an internal hexagonal blind hole, and the base is provided with a through hole.

[0013] In one embodiment, the lower cover is fixedly connected with the base by a screw.

[0014] In one embodiment, the base can rotate circumferentially relative to the shell, and the shell is provided with a locking screw to limit the circumferential rotation between the shell and the base.

[0015] In one embodiment, the elastic element is a large spring; the side of the sphere is provided with a degree-of-freedom conversion hole, and the housing is provided with a degree-of-freedom conversion pin. When the degree-of-freedom conversion pin is inserted into the degree-of-freedom conversion hole of the sphere, the sphere can only move around the axis with the degree-of-freedom conversion pin as the axis; a damping pad is provided between the housing and the sphere, and the housing is provided with a ball core locking mechanism that can clamp the sphere. Attached Figure Description

[0016] Figure 1 This is a top view schematic diagram of the ball joint mechanism in embodiments 1, 2, and 3 of the present invention;

[0017] Figure 2 When the sphere in Example 1 is in its natural state, along Figure 1 Schematic diagram of the cross-sectional structure along the X-X' line;

[0018] Figure 3 When the sphere in Example 1 is tilted at 45°, along Figure 1 Schematic diagram of the cross-sectional structure along the X-X' line;

[0019] Figure 4 When the sphere in Example 1 is tilted at 90°, along Figure 1 Schematic diagram of the cross-sectional structure along the X-X' line;

[0020] Figure 5 When the sphere in Example 1 is in its natural state, along Figure 1 A schematic diagram of the Y-Y' line cross-sectional structure;

[0021] Figure 6 When the sphere in Example 1 is tilted at 45°, along Figure 1 A schematic diagram of the Y-Y' line cross-sectional structure;

[0022] Figure 7 This is a schematic diagram of the lower cover structure in Example 1;

[0023] Figure 8 for Figure 7 A schematic diagram of the left-side view structure;

[0024] Figure 9 for Figure 8 A schematic diagram of the cross-sectional structure;

[0025] Figure 10 This is a schematic diagram of the wedge structure in Example 1;

[0026] Figure 11 for Figure 10 A schematic diagram of the right-side view structure;

[0027] Figure 12 for Figure 10 A schematic diagram of the left-side view structure;

[0028] Figure 13 When the sphere in Example 2 is in its natural state, along Figure 1 A schematic diagram of the Y-Y' line cross-sectional structure;

[0029] Figure 14 These are schematic diagrams of the external structure of the upper cover in Examples 2 and 3;

[0030] Figure 15 When the sphere in Example 3 is in its natural state, along Figure 1 Schematic diagram of the cross-sectional structure along the X-X' line.

[0031] The attached figures are labeled as follows:

[0032] 1. Sphere; 1a. Guide shaft; 1b. Movable cover; 2. Housing; 3. Top cover; 3a. Guide sleeve; 3b. Ball bearing sleeve; 4. Bottom cover; 4a. Guide post; 4b. Angled guide rail; 5. Base; 6. Adjusting screw; 7. Locking screw; 8. Small spring; 9. Large spring; 10. Damping pad; 11. Stainless steel bushing; 12. Wedge; 13. U-shaped notch; 14. Degree of freedom conversion pin. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the invention clearer, the invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. Example 1

[0034] like Figures 1 to 12 As shown, a multi-angle adjustable ball joint mechanism includes a ball 1 and a housing 2 capable of accommodating the ball 1. A ball handle is provided on the upper part of the ball 1, and a U-shaped notch is provided on one side of the upper end of the housing 2 to allow the ball handle to pass. The shell 2 has a notch 13 and an elastic device installed inside. The elastic device includes an upper cover 3, an elastic element, and a lower cover 4 from top to bottom. The elastic element is a large conical spring 9. The upper cover 3 can move up and down inside the shell 2. The position of the lower cover 4 inside the shell 2 is adjustable or non-adjustable. The lower end of the shell 2 is provided with a base 5. A raised frustum is provided in the middle of the upper end face of the upper cover 3. The periphery of the frustum and the upper end face of the upper cover 3 form a conical or arc surface. The sphere 1 is a hollow structure with a large circular hole at the bottom. The sphere 1 is provided with a guide shaft 1a and a movable cover 1b that can move up and down along the guide shaft 1a. The movable cover 1b has a hollow tube that cooperates with the guide shaft 1a. A small spring 8 is sleeved on the outer periphery of the guide shaft 1a and the hollow tube. The elastic force of the small spring 8 is less than that of the large spring 9. The movable cover 1b and the large circular hole are clearance fit. The outer surface of the movable cover 1b is spherical.

[0035] In the above technical solution, the ball 1 is provided with a guide shaft 1a and a movable cover 1b which can move up and down along the guide shaft 1a, the movable cover 1b has a hollow tube matched with the guide shaft 1a, the guide shaft 1a and the hollow tube are provided with a small spring 8, the elastic force of the small spring 8 is smaller than that of a large spring 9, when the ball handle of the ball 1 is in an upright state, the upper cover 3 of the elastic device is pushed into the ball 1 under the action of the large spring 9, when the ball 1 is deflected by about 90° to the U-shaped gap, the small spring 8 in the ball 1 pushes the movable cover 1b to move outward, so that the spherical surface of the movable cover 1b can form a complete spherical shape with the ball 1.

[0036] In order to reduce the weight, the ball 1 is made of aluminum alloy, and a stainless steel bushing 11 is embedded in the large circular hole of the ball 1. Since the periphery of the large circular hole is often in contact and friction with the upper cover 3 during rotation of the ball 1, the embedding of the stainless steel bushing 11 in the large circular hole can increase the wear resistance.

[0037] As shown in Figures 5 to 12 , the lower end surface of the upper cover 3 is provided with a guide sleeve 3a, and the upper end surface of the lower cover 4 is provided with a guide column 4a which can be inserted into the guide sleeve 3a; a wedge 12 is provided below the lower cover 4, the middle part of the wedge 12 is transversely provided with a screw hole, the wedge 12 is transversely installed on an adjusting screw 6 through the screw hole, both ends of the adjusting screw 6 are rotatably installed on the shell 2, the lower surface of the wedge 12 is a plane, the upper surface of the wedge 12 is an inclined surface and at least one inclined groove is provided on the inclined surface, and the lower surface of the lower cover 4 is provided with an inclined guide rail 4b which is embedded with the inclined groove; when the adjusting screw 6 is screwed, the wedge 12 can move left and right along the adjusting screw 6, and through the action of the inclined groove on the inclined guide rail 4b, the lower cover 4 is forced to move upward in the shell 2, so as to realize the adjustment of the position of the lower cover 4. In order to make the connection between the lower cover 4 and the wedge 12 more close, the inclined groove of the wedge 12 can be set as a dovetail groove or a T-shaped groove, and the shape of the inclined guide rail 4a can be set as a structure matched with the dovetail groove or the T-shaped groove.

[0038] As shown in Figures 2 to 4 , the base 5 can rotate circumferentially relative to the shell 2, and the shell 2 is provided with a locking screw 7 to limit the circumferential rotation between the shell 2 and the base 5.

[0039] As shown in Figure 5 , 6 , the side surface of the ball 1 is provided with a degree of freedom conversion hole, and the shell 2 is provided with a degree of freedom conversion pin 14, when the degree of freedom conversion pin 14 is inserted into the degree of freedom conversion hole of the ball 1, the ball 1 can only rotate around the degree of freedom conversion pin 14 as the axis;

[0040] As shown in Figures 1 to 6As shown, damping pad 10 is arranged between shell 2 and ball 1, and locking mechanism is arranged on shell 2 to clamp ball 1.

[0041] The working principle and process of the embodiment are as follows: the base 5 of the ball joint mechanism provided by the embodiment can be installed on a tripod, and the ball handle of the ball 1 is used to install a gimbal. Since a large circular hole is formed in the lower part of the ball 1, the distance between the lower part of the ball 1 and the ball center is less than the distance between the spherical surface and the ball center. When the ball 1 is rotated in the shell 2 by hand to make the spherical surface contact the upper surface of the upper cover 3, the ball 1 will push the upper cover 3 to move downward against the elastic force of the large spring 9. Once the hand is released, the elastic force of the large spring 9 will act on the upper cover 3 to push the ball 1 back to the original position, and the movable cover 1b will be inserted into the ball 1, so that the circular hole of the ball 1 is in contact with or corresponds to the upper surface of the upper cover 3. The cooperation of the guide sleeve 3a and the guide column 4a can avoid the deflection and jamming of the upper cover 3 during the up-and-down movement. The upper end surface of the upper cover 3 is provided with a convex circular table, and the periphery of the circular table and the upper end surface of the upper cover 3 form a conical surface or an arc surface. The included angle between the conical surface or the arc surface and the circular table is 15°-30°. The conical surface is arranged to facilitate the ball 1 to always act on the conical surface when the ball 1 is rotated, so that the ball 1 and the upper cover 3 always maintain good contact, thereby enabling the ball 1 to be fixed after being rotated to any state due to sufficient clamping force. Embodiment 2

[0042] As shown in Figure 13 , 14 , the basic structure and principle of the ball joint mechanism provided by the embodiment are the same as those of embodiment 1, and the differences are as follows: first, the guide sleeve 3a of the upper cover is cancelled, and a downward extending ball shaft sleeve 3b is arranged on the outer periphery of the upper cover 3. The ball shaft sleeve 3b is in contact with the inner wall of the shell 2 through a plurality of balls, which can avoid the jamming of the upper cover 3 during the movement; second, the guide column 4a of the lower cover 4 is cancelled, and the large spring 9 is replaced by a cylindrical spring.

[0043] The ball joint mechanism provided by the embodiment can be made smaller in size compared with embodiment 1. Embodiment 3

[0044] As shown in Figure 14 , 15 , the basic structure and principle of the ball joint mechanism provided by the embodiment are the same as those of embodiment 2, and the structure is further simplified based on embodiment 2: first, the inclined wedge 12 is cancelled; second, the inclined guide rail 4b of the lower cover 4 is cancelled, and the lower cover 4 is installed in the shell 2 by threaded connection. The lower surface of the lower cover 4 is provided with an internal hexagonal blind hole, and the base 5 is provided with a through hole. When adjustment is needed, an external hexagonal wrench can be inserted into the internal hexagonal blind hole of the lower cover 4 through the through hole of the base 5, so as to rotate the lower cover 4 to move upward or downward relative to the shell 2.

[0045] The ball joint mechanism provided by the embodiment has a further reduced volume compared with the embodiment 2, but the adjustment of the lower cover 4 is not as convenient as that of the embodiment 2. Embodiment 4

[0046] The embodiment is a further improvement on the basis of the embodiment 3, that is, the lower cover 4 is fixedly connected with the base 5 by a screw, or the lower cover 4 is combined with the base 5 to form one part, so that the overall structure is simpler. This structure is suitable for the ball joint mechanism with a smaller volume, and the position of the lower cover 4 does not need to be adjusted.

[0047] The above embodiments are the preferred implementation of the present application, in addition to this, the present application can be implemented in other ways, any obvious replacement without departing from the technical scheme concept is within the scope of the present application patent.

[0048] In order to make the ordinary skilled in the art more convenient to understand the improvement of the present application relative to the prior art, some of the drawings and descriptions of the present application have been simplified, and some other elements have been omitted in the present application file for the sake of clarity, and the ordinary skilled in the art should realize that these omitted elements can also constitute the content of the present application.

Claims

1. A multi-angle adjustable ball joint mechanism, comprising a ball (1) and a shell (2) capable of accommodating the ball (1), the ball (1) being provided with a ball handle at the upper portion, one side of the upper end of the shell (2) being provided with a U-shaped gap (13) for avoiding the ball handle, a spring device being further installed in the shell (2), the spring device comprising an upper cover (3), a spring, and a lower cover (4) from top to bottom, and the lower end of the shell (2) being provided with a base (5); characterized in that: The upper end surface of the upper cover (3) is provided with a convex circular truncated cone, and the periphery of the circular truncated cone and the upper end surface of the upper cover (3) form a conical surface or an arc surface; the spherical body (1) is a hollow structure and is provided with a large circular hole in the lower part, the spherical body (1) is provided with a guide shaft (1a) and a movable cover (1b) which can move up and down along the guide shaft (1a), the movable cover (1b) has a hollow tube matched with the guide shaft (1a), a small spring (8) is sleeved on the outer periphery of the guide shaft (1a) and the hollow tube, the elastic force of the small spring (8) is smaller than the elastic force of the elastic member, the movable cover (1b) is gap-fitted with the large circular hole, and the outer side surface of the movable cover (1b) is a spherical surface.

2. The poly-angulation adjustable ball joint mechanism according to claim 1, wherein: The spherical body (1) is made of aluminum alloy, and a stainless steel bushing (11) is embedded in the large circular hole of the spherical body (1).

3. The poly-angulated, ball-joint mechanism of claim 1 or 2, wherein: The upper cover (3) can move up and down in the shell (2), and the position of the lower cover (4) in the shell (2) is adjustable or non-adjustable.

4. The poly-angulation adjustable ball joint mechanism of claim 3, wherein: The lower end surface of the upper cover (3) is provided with a guide sleeve (3a), and the upper end surface of the lower cover (4) is provided with a guide column (4a) which can be inserted into the guide sleeve (3a).

5. The poly-angulation adjustable ball joint mechanism of claim 3, wherein: The outer periphery of the upper cover (3) is provided with a downwardly extending ball shaft sleeve (3b) which is in contact with the inner wall of the shell (2).

6. The poly-angulation adjustable ball joint mechanism of claim 3, wherein: A wedge (12) is arranged below the lower cover (4), the middle part of the wedge (12) is transversely provided with a screw hole, the wedge (12) is transversely installed on an adjusting screw rod (6) through the screw hole, both ends of the adjusting screw rod (6) are rotatably installed on the shell (2), the lower surface of the wedge (12) is a plane, the upper surface of the wedge (12) is an inclined surface and is provided with at least one inclined groove on the inclined surface, and the lower surface of the lower cover (4) is provided with an inclined guide rail (4b) which is embedded with the inclined groove; when the adjusting screw rod (6) is screwed, the wedge (12) can move left and right along the adjusting screw rod (6), and the inclined groove acts on the inclined guide rail (4b) to force the lower cover (4) to move upward in the shell (2).

7. The poly-angulation adjustable ball joint mechanism of claim 3, wherein: The lower cover (4) is installed in the shell (2) by screw connection, the lower surface of the lower cover (4) is provided with an internal hexagonal blind hole, and the base (5) is provided with a through hole.

8. The poly-angulation adjustable ball joint mechanism of claim 3, wherein: The lower cover (4) is fixedly connected with the base (5) by screws.

9. The poly-angulation adjustable ball joint mechanism according to claim 1 or 2, characterized in that: The base (5) can rotate circumferentially relative to the shell (2), and the shell (2) is provided with a locking screw rod (7) to limit the circumferential rotation between the shell (2) and the base (5).

10. The poly-angulation adjustable ball joint mechanism according to claim 1 or 2, characterized in that: The elastic member is a large spring (9); the side surface of the spherical body (1) is provided with a degree of freedom conversion hole, the shell (2) is provided with a degree of freedom conversion pin (14), after the degree of freedom conversion pin (14) is inserted into the degree of freedom conversion hole of the spherical body (1), the spherical body (1) can only rotate around the degree of freedom conversion pin (14) as the axis; a damping gasket (10) is arranged between the shell (2) and the spherical body (1), and the shell (2) is provided with a ball core locking mechanism which can clamp the spherical body (1).

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