CN213598396U - Two-degree-of-freedom spherical hinge joint - Google Patents
Two-degree-of-freedom spherical hinge joint Download PDFInfo
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- CN213598396U CN213598396U CN202020553015.1U CN202020553015U CN213598396U CN 213598396 U CN213598396 U CN 213598396U CN 202020553015 U CN202020553015 U CN 202020553015U CN 213598396 U CN213598396 U CN 213598396U
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- guide block
- lower retainer
- ball
- freedom
- groove
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Abstract
The invention relates to a two-degree-of-freedom ball hinge joint which is characterized in that an upper guide block is arranged on a ball head through a fastening screw, the upper guide block can move along a guide groove on the inner concave surface of a lower retainer, and the ball head is matched with the inner concave surface of the lower retainer; the lower guide block is arranged on the ball seat through a fastening screw, the lower guide block can move along a guide groove in the outer convex surface of the lower retainer, and the ball seat is matched with the outer drawing surface of the lower retainer; in order to ensure that the contact surface of the upper guide block and the matching part of the guide groove on the inner concave surface of the lower retainer keeps stressed when the upper guide block rotates along with the ball head, the guide groove on the inner concave surface of the lower retainer is designed into an arc-shaped groove, and the top of the upper guide block is designed with a corresponding arc surface; the guide groove on the lower retainer is designed into an arc-shaped groove, and the top of the lower guide block is designed with a corresponding arc surface; the two guide grooves on the lower retainer are arranged in an orthogonal mode to ensure that two degrees of freedom are not generated simultaneously.
Description
Technical Field
The invention relates to a two-degree-of-freedom spherical hinge joint which is mainly used for a joint connection part requiring two rotational degrees of freedom.
Background
Conventional ball joint joints have three degrees of freedom, but in some cases only two degrees of freedom of rotation are required, and no rotational movement about the ball joint axis is required. Therefore, the invention provides a structural design of a two-degree-of-freedom solution hinge.
Disclosure of Invention
The two-degree-of-freedom ball hinge is composed of a ball head with a screw (hereinafter referred to as the ball head), a ball cover, a ball seat, an upper retainer, a lower retainer, two guide blocks A, B and two fastening screws. The ball head, the guide block A and the lower retainer form a rotational degree of freedom. The ball head is matched and contacted with the inner concave surface of the lower retainer. The structure of guide block A is the cuboid, and its one end is installed in the recess at bulb top to pass through fastening screw A fixed connection. The other end of the guide block A (i.e. the part higher than the spherical surface of the ball head) is matched with the guide groove A of the lower retainer. In order to ensure that the contact surface of the matching part of the guide block A and the guide groove A keeps stressed when the guide block A rotates along with the ball head, the guide groove A is designed into an arc-shaped groove, and the top of the guide block A is designed with a corresponding arc surface.
The lower retainer, the guide block B and the ball seat form another rotational degree of freedom. The concave spherical surface of the ball seat is in contact fit with the convex spherical surface of the lower retainer. One end of the guide block B is arranged in a groove of the concave surface of the ball seat and is fixedly connected with the guide block B through a fastening screw B. The other end of the guide block B (i.e., the portion of the concave surface of the ball seat) is fitted into a guide groove B in the outer spherical surface of the lower holder. In order to ensure that the contact surface of the matching part of the guide block B and the guide groove B keeps stressed when the lower retainer rotates, the guide groove B is designed into an arc-shaped groove, and the top of the guide block B is designed with a corresponding arc surface.
In order to ensure that the two degrees of freedom are not generated simultaneously, the arrangement form of the guide groove A and the guide groove B is a space orthogonal form.
Drawings
FIG. 1 is a cross-sectional view of a two-degree-of-freedom spherical hinge according to the present invention.
Fig. 2 shows a two-degree-of-freedom spherical hinge lower retainer according to the present invention.
Detailed Description
The two-degree-of-freedom ball hinge comprises a ball head (hereinafter referred to as ball head) 1 with a screw rod, a ball cover 2, a ball seat 3, an upper retainer 4, a lower retainer 5, an upper guide block 6, a guide block 7 and screws 8 and 9. The ball head 1, the upper guide block 6 and the lower holder 5 form a rotational degree of freedom. The ball head 1 is matched and contacted with the inner concave surface of the lower retainer 5. The upper guide block 6 is a cuboid, one end of which is arranged in a groove at the top of the ball head 1 and is fixedly connected with the ball head through a fastening screw 8. The other end of the upper guide block 6 (i.e. the part higher than the spherical surface of the ball head) is matched with the guide groove of the lower retainer. In order to ensure that the contact surface of the matching part of the upper guide block 1 and the guide groove 10 of the lower retainer 5 keeps stressed when the upper guide block rotates along with the ball head, the guide groove 10 is designed into an arc-shaped groove, and the top of the upper guide block 1 is designed with a corresponding arc surface.
The lower holder 5, the lower guide block 7 and the ball seat 3 constitute another rotational degree of freedom. The concave spherical surface of the ball seat 3 is contacted and matched with the convex spherical surface of the lower retainer 5. One end of the lower guide block 7 is arranged in a groove at the top of the spherical surface protruded outside the ball seat 3 and is fixedly connected with the ball seat through a fastening screw 9. The other end of the lower guide block 7 (i.e., the portion higher than the inner spherical surface of the ball seat) is engaged with a guide groove 11 in the inner concave spherical surface of the lower holder 5. In order to ensure that the contact surface of the matching part of the lower guide block 7 and the guide groove 11 of the lower retainer keeps stressed when the lower retainer rotates, the guide groove 11 is designed into an arc-shaped groove, and the top of the lower guide block 7 is designed with a corresponding arc surface.
In order to ensure that the two degrees of freedom do not occur simultaneously, the arrangement of the lower cage guide grooves 10, 11 is in a spatially orthogonal manner. When the ball head moves along the direction of the guide groove 10, the lower retainer and the ball seat are integrated under the action of the guide block 7 and the guide groove 11 because the two guide grooves are orthogonal, so that the ball hinge has only one degree of freedom of rotation along the direction of the guide groove 10. When the ball head moves along the direction of the guide groove 11, the lower retainer and the ball head are integrated under the action of the guide block 6 and the guide groove 10 because the two guide grooves are in an orthogonal structure, so that the ball hinge has only one rotation degree of freedom along the direction of the guide groove 11.
Claims (4)
1. A two-degree-of-freedom spherical hinge joint is characterized by comprising a ball head with a screw, a ball cover, a ball seat, an upper retainer, a lower retainer, an upper guide block, a lower guide block and two fastening screws; the upper guide block is arranged on the ball head through a fastening screw, the upper guide block can move along a guide groove on the inner concave surface of the lower retainer, and the ball head is matched with the inner concave surface of the lower retainer; the lower guide block is arranged on the ball seat through a fastening screw, the lower guide block can move along a guide groove in the outer convex surface of the lower retainer, and the ball seat is matched with the outer drawing surface of the lower retainer; in order to ensure that the contact surface of the upper guide block and the matching part of the guide groove on the inner concave surface of the lower retainer keeps stressed when the upper guide block rotates along with the ball head, the guide groove on the inner concave surface of the lower retainer is designed into an arc-shaped groove, and the top of the upper guide block is designed with a corresponding arc surface; in order to ensure that the contact surface of the lower guide block and the matching part of the guide groove on the lower retainer keeps stressed when the lower guide block rotates in the lower retainer, the guide groove on the lower retainer is designed into an arc-shaped groove, and the top of the lower guide block is designed with a corresponding arc surface; the two guide grooves on the lower retainer are arranged in an orthogonal mode to guarantee that two degrees of freedom are not generated simultaneously.
2. The two-degree-of-freedom ball hinge joint according to claim 1, wherein the ball head further comprises an upper guide block and a fastening screw, the upper guide block is mounted in a groove of the ball head through the fastening screw, and the ball head with the upper guide block moves along a guide groove on the inner concave surface of the lower holder to generate a degree of freedom.
3. The two-degree-of-freedom ball hinge joint according to claim 1, wherein the ball seat further comprises an upper guide block and a lower guide block, and a fastening screw, the lower guide block is mounted in a groove of the ball seat by the fastening screw, and the ball seat with the lower guide block moves along a guide groove on an inner concave surface of the lower holder with one degree of freedom.
4. The two-degree-of-freedom spherical hinge joint according to claim 1, wherein the two guide grooves of the lower holder are orthogonally arranged to ensure that the two degrees of freedom are not generated simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020553015.1U CN213598396U (en) | 2020-04-15 | 2020-04-15 | Two-degree-of-freedom spherical hinge joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020553015.1U CN213598396U (en) | 2020-04-15 | 2020-04-15 | Two-degree-of-freedom spherical hinge joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213598396U true CN213598396U (en) | 2021-07-02 |
Family
ID=76582391
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020553015.1U Active CN213598396U (en) | 2020-04-15 | 2020-04-15 | Two-degree-of-freedom spherical hinge joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213598396U (en) |
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2020
- 2020-04-15 CN CN202020553015.1U patent/CN213598396U/en active Active
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