Swing ball head with large rotation angle and low rotation torque

Abstract

A swing ball head with a large rotation angle and low rotation torque comprises a mounting seat, a V-shaped ball head, a ball core and a screw rod, the ball core is arranged in the V-shaped ball head, mounting holes are formed in the ball core and the mounting seat, and one end of the screw rod penetrates through the mounting hole of the ball core and is screwed in the mounting hole of the mounting seat. The swing ball head further comprises a ball hinge sleeve and a pressing mechanism, one end of the ball hinge sleeve is of a split type structure, and the ball core is wrapped with the ball hinge sleeve. And the pressing mechanism presses the spherical hinge sleeve in the V-shaped ball head in the vertical direction, so that the ball core can rotate relative to the spherical hinge sleeve. The swinging ball head is arranged to be spherical through the inner surface of the spherical hinge sleeve, so that the ball core can rotate in the spherical hinge sleeve at any angle. And the spherical hinge sleeve and the spherical core are assembled in a clearance fit manner, and the spherical inner surface of the spherical hinge sleeve is polished, so that the rotating torque of the spherical core rotating relative to the spherical hinge sleeve is reduced.

Description

Technical Field

[0001] The utility model relates to a ball head of a V-shaped thrust rod for an automobile, in particular to a swing ball head with a large rotation angle and low rotation torque. Background Art

[0002] Through domestic search, it was found that the following patents have similarities with this utility model:

[0003] The utility model with application number CN202223217497.1 and name "Ball head structure, thrust rod, suspension device and vehicle" relates to a ball head structure, thrust rod, suspension device and vehicle. The ball head structure includes a fixed part, a movable part and a vibration isolation assembly; the fixed part has a cavity; the movable part has a movable part and a connecting part, the movable part is located in the cavity, and the connecting part extends out of the cavity for connecting to an external structure; the vibration isolation assembly is clamped between the movable part and the fixed part to isolate the movable part and the fixed part from vibration; the vibration isolation assembly includes a rubber block and a rubber gasket, the rubber block is fixed on the movable part, the rubber gasket is clamped between the rubber block and the fixed part, and the stiffness of the rubber gasket is less than the stiffness of the rubber block. The ball head structure provided by the utility model has reliable connection and has effective vibration filtering and noise reduction performance.

[0004] The utility model with application number CN201320223718.8 and titled "A thrust rod ball head assembly" discloses a thrust rod ball head assembly, including a core shaft, an elastic body, an end cover, a retaining ring and a ball head body, wherein the ball head body is provided with a ball joint mounting hole, a thrust shoulder is provided at one end of the ball joint mounting hole, and a retaining ring clamping groove is provided at the other end, the elastic body is wrapped outside the spherical body of the core shaft, and an end cover is provided at both ends of the elastic body, wherein one end cover is axially positioned by the thrust shoulder, and the other end cover is axially positioned by the retaining ring installed in the retaining ring clamping groove, the retaining ring is provided with a boss on one end face, and a groove for accommodating the boss is provided in the retaining ring clamping groove, and the boss is clamped in the groove under the elastic force of the elastic body. The thrust rod ball head assembly has the advantages of simple and compact structure, convenient installation, avoiding the retaining ring from falling off, exemption from maintenance work, and greatly improved safety performance.

[0005] Although the above patents are also ball heads on thrust rods, the ball cores of the above patents are vulcanized with rubber. Therefore, the rotational torque and the rotation angle of the ball core when rotating in the ball head will be affected by the rubber layer. It is difficult for the ball core to have low rotational torque and large deflection at any angle when rotating. Therefore, further research is needed on how the ball core in the ball head of the thrust rod can achieve large rotation angle and low rotational torque. Utility Model Content

[0006] The technical problem to be solved by the utility model is: how to achieve large-angle deflection and very small rotation torque when the ball core in the ball head of the thrust rod rotates.

[0007] In view of the above problems, the technical solution proposed by the utility model is: a swing ball head with large turning angle and low rotational torque, including a mounting seat, a V-shaped ball head, a ball core and a screw, the ball core is arranged in the V-shaped ball head, and mounting holes are opened on the ball core and the mounting seat, one end of the screw passes through the mounting hole of the ball core and is tightened in the mounting hole of the mounting seat; it also includes a ball hinge sleeve and a clamping mechanism, one end of the ball hinge sleeve is a petal structure, and the ball hinge sleeve is wrapped around the ball core; the clamping mechanism presses the ball hinge sleeve in the V-shaped ball head in the vertical direction, so that the ball core can rotate relative to the ball hinge sleeve.

[0008] Preferably, the ball joint sleeve comprises a bottom ring and sleeve petals, the bottom ring is seamlessly connected to the lower end of the sleeve petals, and a strip-shaped seam is provided between two adjacent sleeve petals to separate the sleeve petals from each other.

[0009] Preferably, the bottom ring is in the shape of an inverted hollow truncated cone with openings at both ends, and the sleeve petals are distributed along the circumferential direction of the bottom ring to form a circular tube with a strip slit at the lower end and a hollow truncated cone with a strip slit at the upper end.

[0010] Preferably, the ball core is pressed into the ball hinge sleeve from the sleeve petal, the inner side of the ball hinge sleeve is spherical, and the ball hinge sleeve and the ball core are assembled with clearance fit, which can reduce the rotational torque of the ball core when it rotates relative to the ball hinge sleeve.

[0011] Preferably, the inner side surface of the ball joint sleeve is smooth and the reverse side surface is rough, so as to further reduce the rotation torque when the ball core rotates relative to the ball joint sleeve.

[0012] Preferably, the clamping mechanism includes a retaining ring, a gasket and a sleeve, and the retaining ring, the gasket and the sleeve are all annular, the cross-section of the sleeve is a wedge-shaped with a larger upper end and a smaller lower end, and the inner surface of the sleeve fits with the outer surface of the upper end of the ball joint sleeve.

[0013] Preferably, an annular groove is opened on the inner side of the upper end of the V-shaped ball head, the retaining ring is engaged in the annular groove, the gasket is arranged between the retaining ring and the outer sleeve, and the retaining ring presses the gasket, the outer sleeve and the ball joint sleeve downward in sequence.

[0014] The beneficial technical effect of the utility model is: the ball core is pressed into a ball joint sleeve made of a high-grade material with petals at the upper end, and then the ball core and the ball joint sleeve are installed together into a V-shaped ball head. The inner surface of the ball joint sleeve is set to a spherical shape, so that the ball core can rotate at any angle in the ball joint sleeve. The ball joint sleeve and the ball core are assembled with clearance, and the spherical inner surface of the ball joint sleeve is polished, thereby reducing the rotation torque when the ball core rotates relative to the ball joint sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1It is a three-dimensional schematic diagram of the overall structure of the first embodiment;

[0016] Figure 2 It is a schematic cross-sectional view of the overall structure of the first embodiment;

[0017] Figure 3 An exploded view of the V-shaped ball head, ball core, ball hinge sleeve and clamping mechanism in Example 1;

[0018] Figure 4 It is a schematic diagram of the assembly of the ball core and the ball hinge sleeve in the first embodiment;

[0019] Figure 5 It is a schematic diagram of the three-dimensional structure of the ball joint sleeve in the first embodiment;

[0020] In the figure: mounting seat 1, V-shaped ball head 2, annular groove 21, end cover 3, retaining ring 4, gasket 5, outer sleeve 6, ball joint sleeve 7, bottom ring 71, sleeve petal 72, strip seam 73, ball core 8, screw 9, sealing ring 10. DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with the embodiments and drawings: Embodiment 1

[0022] like Figure 1 , Figure 2 and Figure 3 As shown, the swing ball head includes a mounting seat 1, a VV-shaped ball head 2, a ball core 8, a screw rod 9, a ball hinge sleeve 7 and a clamping mechanism. The upper end of the ball hinge sleeve 7 is set as a petal-shaped structure. First, the multi-genus ball core 8 is pressed into the polymer ball hinge sleeve 7 from the petal-shaped structure at the upper end of the ball hinge sleeve 7. Then the ball core 8 and the ball hinge sleeve 7 are installed into the VV-shaped ball head 2 together. There are mounting holes on the ball core 8, the ball hinge sleeve 7 and the mounting seat 1. The mounting holes on the ball core 8 and the ball hinge sleeve 7 are through holes without threads, while the mounting holes on the mounting seat 1 are threads. One end of the screw rod 9 passes through the mounting holes of the ball core 8 and the ball hinge sleeve 7 and is tightened in the mounting hole of the mounting seat 1, so that the mounting seat 1, the screw rod 9 and the ball core 8 are connected into an integral fixed structure.

[0023] The clamping mechanism includes a retaining ring 4, a gasket 5 and a jacket 6, and the retaining ring 4, the gasket 5 and the jacket 6 are all annular structures. The cross section of the jacket 6 is a wedge-shaped structure with a large upper end and a small lower end. The jacket 6 covers the upper end of the ball joint sleeve 7, so that the inner surface of the jacket 6 is pressed and fitted with the outer surface of the upper end of the ball joint sleeve 7. An annular groove 21 is opened on the inner side of the upper end of the VV-type ball head 2, and the retaining ring 4 is engaged in the annular groove 21. The gasket 5 is arranged between the retaining ring 4 and the jacket 6. The gasket 5 is made of elastic material. The gasket 5 is squeezed between the retaining ring 4 and the jacket 6 to produce a vertical deformation, so that the retaining ring 4 can press the gasket 5, the jacket 6 and the ball joint sleeve 7 downward in sequence. The ball joint sleeve 7 is arranged in the VV-type ball head 2, and the clamping mechanism will press the ball joint sleeve 7 in the VV-type ball head 2 in the vertical direction, so that the bottom of the ball joint sleeve 7 is against the bottom of the VV-type ball head 2. The top of the VV-type ball head 2 is also provided with an end cover 3, which covers the top of the VV-type ball head 2. A sealing ring 10 is provided on the outer side of the lower end of the VV-type ball head 2 and the upper end of the mounting seat 1, and the cross-section of the sealing ring 10 is S-shaped. The end cover 3 and the sealing ring 10 can prevent dust, water vapor and other impurities in the air from entering the VV-type ball head 2. The VV-type ball head 2, the clamping mechanism, the ball hinge sleeve 7, the end cover 3 and the sealing ring 10 are connected together to form an integral rotating structure. The ball hinge sleeve 7 and the ball core 8 are installed with the spherical surface and clearance fit, so that the integral rotating structure can rotate around the integral fixed structure formed by the mounting seat 1, the screw 9 and the ball core 8.

[0024] like Figure 4 and Figure 5 As shown, the ball joint sleeve 7 includes a bottom ring 71 and sleeve petals 72. The bottom ring 71 is seamlessly connected to the lower end of the sleeve petals 72. A strip slit 73 is provided between two adjacent sleeve petals 72 to separate the sleeve petals 72 from each other. The bottom ring 71 is in the shape of an inverted hollow truncated cone with openings at both ends. The upper end of the bottom ring 71 is larger than the lower end. The sleeve petals 72 are distributed along the circumferential direction of the bottom ring 71. A plurality of sleeve petals 72 form a circular tube with a strip slit 73 at the lower end and a hollow truncated cone with a strip slit 73 at the upper end. The upper end of the hollow truncated cone of the sleeve petals 72 is smaller than the lower end.

[0025] The ball joint sleeve 7 and the pressing sleeve are both made of polymer materials, and the polymer materials are preferably polyoxymethylene and polyurethane. When the ball core 8 is pressed into the ball joint sleeve 7 from the sleeve flap 72, the sleeve flap 72 made of the polymer material is first opened by the metal ball core 8, so that the ball core 8 can be pressed into the ball joint sleeve 7; when the ball core 8 enters the ball joint sleeve 7, the sleeve flap 72 closes under the action of its own elastic force, thereby wrapping the ball core 8. The inner side surface of the ball joint sleeve 7 is spherical, and the ball joint sleeve 7 and the ball core 8 are assembled with clearance, which can reduce the rotational torque of the ball core 8 when it rotates relative to the ball joint sleeve 7. The inner side surface of the ball joint sleeve 7 is smooth and the reverse side surface is rough, thereby further reducing the rotational torque of the ball core 8 when it rotates relative to the ball joint sleeve 7.

[0026] like Figure 4 As shown, after the ball core 8 is pressed into the ball joint sleeve 7, the ball joint sleeve 7 can rotate relative to the ball core 8 in any direction and at any angle. Figure 2 As shown, when the ball core 8, the ball hinge sleeve 7, the VV-type ball head 2 and the mounting seat 1 are connected by the screw rod 9, the rotation angle of the ball hinge sleeve 7 relative to the ball core 8 in the vertical deflection direction will be limited; however, the inner side surface of the ball hinge sleeve 7 is spherical, and the structure of the ball hinge sleeve 7 and the ball core 8 with clearance fit can still enable the VV-type ball head 2 to drive the ball hinge sleeve 7 to deflect as much as possible relative to the ball core 8. Unlike the existing products, the VV-type ball head 2 will not be hindered by the vulcanized rubber layer in the VV-type ball head 2 when it deflects vertically relative to the ball core 8. Therefore, the swing ball head of this embodiment has the technical effects of large rotation angle and low rotation torque.

[0027] like Figures 1 to 5 As shown, in summary, the swing ball head of this embodiment is a fixed structure that connects the mounting seat 1 and the ball core 8 with a screw 9, while the VV-type ball head 2, the clamping mechanism, and the ball hinge sleeve 7 are connected to form an integral rotating structure. The ball hinge sleeve 7 and the ball core 8 are installed with the spherical surface and clearance fit, so that the integral rotating structure can rotate around the integral fixed structure. The ball hinge sleeve 7 and the outer sleeve 6 are made of a polymer material with a certain elasticity to replace the existing vulcanized rubber layer structure. The inner side of the ball hinge sleeve 7 is polished into a smooth spherical shape, so that the ball hinge sleeve 7 and the ball core 8 are installed with the spherical surface and clearance fit. Therefore, when the VV-type ball head 2 rotates relative to the ball core 8, it has technical effects such as a large vertical deflection angle and a low rotation torque. The end cap 3 and the sealing ring 10 are then used to seal the two ends of the VV-type ball head 2 to reduce impurities from entering the VV-type ball head 2 and causing damage to the components inside the VV-type ball head 2.

[0028] Obviously, without departing from the principle of the present invention, several improvements or modifications made should be regarded as within the protection scope of the present invention.

Claims

1. A swing ball head with large rotation angle and low rotation torque, comprising a mounting seat, a V-shaped ball head, a ball core and a screw, wherein the ball core is arranged in the V-shaped ball head, and mounting holes are provided on the ball core and the mounting seat, and one end of the screw passes through the mounting hole of the ball core and is tightened in the mounting hole of the mounting seat; characterized in that: It also includes a ball joint sleeve and a clamping mechanism. One end of the ball joint sleeve is a petal structure, and the ball joint sleeve is wrapped around the ball core. The clamping mechanism presses the ball joint sleeve in the V-shaped ball head in the vertical direction, so that the ball core can rotate relative to the ball joint sleeve.

2. A swing ball head with large rotation angle and low rotation torque according to claim 1, characterized in that: The ball joint sleeve comprises a bottom ring and sleeve petals. The bottom ring is seamlessly connected to the lower end of the sleeve petals. A strip seam is provided between two adjacent sleeve petals to separate the sleeve petals from each other.

3. A swing ball head with large rotation angle and low rotation torque according to claim 2, characterized in that: The bottom ring is in the shape of an inverted hollow truncated cone with openings at both ends, and the sleeve petals are distributed along the circumferential direction of the bottom ring, forming a circular tube with a strip slit at the lower end and a hollow truncated cone with a strip slit at the upper end.

4. A swing ball head with large rotation angle and low rotation torque according to claim 3, characterized in that: The ball core is pressed into the ball joint sleeve from the sleeve petal. The inner side of the ball joint sleeve is spherical. The ball joint sleeve and the ball core are assembled with clearance fit, which can reduce the rotation torque of the ball core relative to the ball joint sleeve.

5. A swing ball head with large rotation angle and low rotation torque according to claim 4, characterized in that: The inner side of the ball joint sleeve is smooth and the reverse side is rough, thereby further reducing the rotation torque when the ball core rotates relative to the ball joint sleeve.

6. A swing ball head with large rotation angle and low rotation torque according to claim 5, characterized in that: The clamping mechanism includes a retaining ring, a gasket and a sleeve, and the retaining ring, the gasket and the sleeve are all annular. The cross section of the sleeve is a wedge-shaped with a large upper end and a small lower end. The inner surface of the sleeve fits with the outer surface of the upper end of the ball joint sleeve.

7. A swing ball head with large rotation angle and low rotation torque according to claim 6, characterized in that: An annular groove is formed on the inner side of the upper end of the V-shaped ball head, a retaining ring is engaged in the annular groove, a gasket is arranged between the retaining ring and the outer sleeve, and the retaining ring presses the gasket, the outer sleeve and the ball joint sleeve downward in sequence.

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