Joint with square ball head and universal connector

Abstract

The invention relates to a joint with a square ball head and a universal connector, a positioning steel ball capable of retracting inwards is arranged on the square ball head, the position of the positioning steel ball on the square ball head is a square boundary of the maximum size of the square ball head, the two sides of the square boundary are of a quadrangular frustum pyramid structure, and the axial section of the square ball head is square; a square column is arranged at the connecting position between the square ball head and the connector body, the size of the square column is the same as that of the square boundary, the square column and the square boundary are combined to form an extending cylindrical surface, and a square neck is arranged between the square ball head and the square column. After the square ball head is matched with the square rabbet of the sleeve in an inserted mode, the connector can incline by an angle relative to the sleeve, and therefore torque can be transmitted in a narrow or irregular space. The extension cylindrical surface has the same function as the square tenon, and the square ball head and the square column limit the coaxiality between the joint and the sleeve, so that the stability between the joint and the sleeve can be ensured when the torque is coaxially transmitted.

Description

Technical Field

[0001] The invention belongs to the field of sleeve tools, and in particular relates to a joint with a square ball head and a universal connector. Background Art

[0002] Usually, the socket is connected vertically to matching wrenches, torque wrenches, ratchet wrenches and other tools, and can only transmit coaxial torque, but cannot transmit torque in an inclined direction. The existing joints connecting the sockets and wrenches are also connected vertically, but in some places the space cannot ensure that the socket can be inserted vertically. At this time, a component is needed to meet the angled torque transmission.

[0003] So people studied the universal joint, which connects the matching handle and sleeve through the universal joint to achieve free change of the angle between the handle and the sleeve, thereby providing torque transmission in narrow or irregular spaces. The universal joint mainly includes a mother seat, a joint body and a connecting structure connecting the mother seat and the joint body. Through the connecting structure, the mother seat and the joint body are cross-hinged and can rotate relative to each other. The mother seat is provided with a square tenon for connecting with the head of the wrench, and the joint body is provided with a square tenon. The square tenon cooperates with the square tenon of the sleeve to achieve torque transmission.

[0004] However, the existing universal joint only has a connection structure that can make the female seat and the joint body tilt relative to each other, and the tilt angle is limited. Summary of the invention

[0005] The invention provides a joint with a square ball head. The end of the joint adopts a new square tenon structure, that is, a square ball head structure. The axial cross-sections of the square ball heads are all square. The position of a positioning steel ball on the square ball head is a square boundary. The two sides of the square boundary are in a quadrangular pyramid structure. After the joint is connected with a sleeve, a relative inclination is generated at the position of the square ball head, so that the torque transmission between the wrench and the sleeve can adapt to the needs of the inclination angle; a square column is arranged at the joint between the square ball head and the joint, and the square column and the square boundary form an extended cylindrical surface. The extended cylindrical surface enables the joint to limit the transmission of torque in a coaxial direction.

[0006] The present invention also provides a universal connector using a square ball head. The square ball head structure is adopted on the joint body, so that after the joint body is connected to the sleeve, a relative tilt is generated at the square ball head position. Combined with the tilt angle of the connection structure between the joint body and the connecting socket, the overall tilt angle of the universal connector relative to the sleeve is increased.

[0007] The specific technical scheme of the present invention is: a joint with a square ball head, including a joint body, one end of the joint body is provided with a square tenon for connecting the head of a wrench, the other end of the joint body is provided with a square ball head connected to the sleeve, the square ball head is provided with a retractable positioning steel ball, the position of the positioning steel ball on the square ball head is the square boundary of the maximum size of the square ball head, the two sides of the square boundary are square pyramid structures, and the axial cross-section of the square ball head is a square; a square column is provided at the connecting part between the square ball head and the joint body, the size of the square column is the same as the size of the square boundary, the square column and the square boundary are combined into an extended cylindrical surface, and a square neck is provided between the square ball head and the square column.

[0008] The square ball head is not a spherical structure, but a structure composed of multiple planes, with a square boundary similar to the diameter of a sphere, and four prisms similar to the upper and lower hemispheres on both sides of the square boundary. The cross-section of the sphere is circular. The axial cross-section of the square ball head of this joint is square, but the areas of adjacent axial cross-sections are different. The cross-sectional area at the square boundary is the largest, and the areas of the axial cross-sections on both sides of the square decomposition gradually decrease. The outer dimensions of the square boundary are compatible with the dimensions of the square tenon of the sleeve to be matched, and the dimensions of the remaining parts of the square ball head are smaller than the dimensions of the square tenon, so that after the square ball head of the joint is plugged into the square tenon of the sleeve, The joint can be tilted at an angle relative to the sleeve, thereby changing the direction angle of torque transmission, so that torque can be transmitted in a narrow or irregular space; the setting of a square column with the same size as the square boundary forms an extended cylindrical surface between the square column and the square boundary, and the extended cylindrical surface has the same function as the square tenon, that is, when the square column is inserted into the square tenon of the sleeve at the same time, the square ball head and the square column limit the coaxiality between the joint and the sleeve, and when the torque is transmitted coaxially, the stability between the joint and the sleeve can be guaranteed. Once the square column is separated from the square tenon of the sleeve, the joint can be tilted at an angle relative to the sleeve, and the square neck can play a role in limiting the tilt.

[0009] Preferably, the four-sided pyramid on the end side of the square boundary is an outer four-sided pyramid, and the four-sided pyramid on the other side of the square boundary is an inner four-sided pyramid. The oblique height angle of the outer four-sided pyramid is greater than the oblique height angle of the inner four-sided pyramid, and the height of the outer four-sided pyramid is less than the height of the inner four-sided pyramid. After the joint is matched with the sleeve, the outer four-sided pyramid is located further inside the sleeve than the inner four-sided pyramid, and the height of the outer four-sided pyramid is less than the height of the inner four-sided pyramid, which facilitates the rotation of the square ball head in the square tenon of the sleeve, and the inner four-sided pyramid can ensure that the square ball head rotates to the maximum angle in the sleeve.

[0010] As a preferred embodiment, there is a transition section between the square neck and the square column, and the transition section is a cubic structure with a concave surface, and the axis of the concave surface is perpendicular to the axis of the joint body. The square neck is the position of the smallest cross-sectional area of ​​the square ball head. The square ball head rotates in the sleeve, and the square neck is the position with the largest rotation range of the square ball head. The cross-sectional area of ​​the square neck is the smallest, which means that the outer dimensions of the square neck are the smallest, ensuring the smooth rotation of the square ball head.

[0011] As a preferred embodiment, the edge position of the square ball head adopts a facet structure transition. When the facet structure transitions the edge position of the square ball head, when the torque is transmitted by tilting, no sudden change of movement will occur when crossing the edge position, and the transition is relatively smooth.

[0012] A universal connector comprises a female seat, a joint body and a connecting structure connecting the female seat and the joint body, wherein a square tenon is arranged on the female seat, a square ball head is arranged on the joint body, opposite ends of the female seat and the joint body are in a connecting fork structure, and the opposite connecting forks and the connecting structure are cross-hinged; a retractable positioning steel ball is arranged on the square ball head, the position of the positioning steel ball on the square ball head is a square boundary of the maximum size of the square ball head, the two sides of the square boundary are in a four-sided pyramid structure, and the axial cross-section of the square ball head is a square; a square column is arranged at the connecting part between the square ball head and the joint body, the size of the square column is the same as the size of the square boundary, the square column and the square boundary are combined into an extended cylindrical surface, and a square neck is arranged between the square ball head and the square column.

[0013] The female seat, the joint body and the connecting structure form a universal rotating structure. A square ball head structure is arranged at the end of the joint body. There will be an inclination between the square ball head and the sleeve. Combined with the inclination at the connecting structure, the inclination angle of the universal connector is increased. The square joint has two modes: straight line and inclined. In the straight line mode, the inclination generated by the connecting structure between the female seat and the joint body is completely used. In the inclined mode of the square joint, the inclination generated by the connecting structure between the female seat and the joint body is the sum of the inclination of the square joint, thereby increasing the inclination angle of the universal connector.

[0014] Preferably, the quadrangular pyramid on the end side of the square boundary is an outer quadrangular pyramid, and the quadrangular pyramid on the other side of the square boundary is an inner quadrangular pyramid. The oblique height angle of the outer quadrangular pyramid is greater than the oblique height angle of the inner quadrangular pyramid, and the height of the outer quadrangular pyramid is less than the height of the inner quadrangular pyramid.

[0015] Preferably, the connection structure is a square connection column, both ends of which are respectively plugged into the connection fork on the joint body and the connection fork on the mother seat, and the connection fork and the connection column are hinged by a pin.

[0016] Preferably, the two pins on the connecting column are perpendicular to each other and in different planes, the pin of the articulated female seat is outside the joint body, and the pin of the articulated joint body is outside the female seat.

[0017] Preferably, there is a transition section between the square neck and the square column, and the transition section is a cubic structure with a concave surface, and the axis of the concave surface is perpendicular to the axis of the joint body.

[0018] The beneficial effects of the present invention are as follows: the outer dimensions of the square boundary are compatible with the dimensions of the square tenon of the sleeve to be matched, and the dimensions of the remaining parts of the square ball head are smaller than the dimensions of the square tenon, so that after the square ball head of the joint is plugged into the square tenon of the sleeve, the joint can be tilted at an angle relative to the sleeve, thereby changing the direction angle of torque transmission, and torque can be transmitted in a narrow or irregular space; the setting of a square column with the same size as the square boundary forms an extended cylindrical surface between the square column and the square boundary, and the extended cylindrical surface has the same function as the square tenon, that is, when the square column is inserted into the square tenon of the sleeve at the same time, the square ball head and the square column define the coaxiality between the joint and the sleeve, and when the torque is transmitted coaxially, the stability between the joint and the sleeve can be guaranteed, and once the square column is separated from the square tenon of the sleeve, the joint can be tilted at an angle relative to the sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a joint of the present invention; Figure 2 The present invention Figure 1 Schematic diagram of two modes of connection between the connector and the sleeve; Figure 3 It is a structural schematic diagram of a connector of the present invention; Figure 4 The present invention Figure 3 A schematic structural diagram of a connector body of the connector shown; In the figure: 1, joint body, 2, boss, 3, square column, 4, extended cylinder, 5, inner tetrahedron, 6, square boundary, 7, outer tetrahedron, 8, positioning steel ball, 9, square neck, 10, transition section, 11, square ball head, 12, sleeve, 13, square tenon, 14, joint body, 15, connecting column, 16, female seat, a, oblique height angle of outer tetrahedron, b, oblique height angle of inner tetrahedron. DETAILED DESCRIPTION

[0020] The present invention will be further described below through specific embodiments in conjunction with the accompanying drawings. Example

[0021] like Figure 1 Figure 2As shown, a joint with a square ball head includes a joint body 1, one end of the joint body is provided with a square tenon 13 for connecting the head of a wrench, the other end of the joint body is provided with a square ball head 11 connected to the sleeve, and the square ball head is provided with a retractable positioning steel ball 8, the positioning steel ball is located at the square boundary 6 of the maximum size of the square ball head, the two sides of the square boundary are in a four-sided pyramid structure, and the axial cross-section of the square ball head is a square. The edge position of the square ball head adopts a facet structure. A square column 3 is provided at the joint between the square ball head and the joint body, the size of the square column is the same as the size of the square boundary, the square column and the square boundary are combined into an extended cylinder 4, and a square neck 9 is provided between the square ball head and the square column. There is a transition section 10 between the square neck and the square column, and the transition section is a square cube structure with a concave surface on the outside, and the axis of the concave surface is perpendicular to the axis of the joint body. The square column and the joint body are connected by a boss 2, and the boss is circular.

[0022] The quadrangular pyramid on the end side of the square boundary is an outer quadrangular pyramid 7, and the quadrangular pyramid on the other side of the square boundary is an inner quadrangular pyramid 5. The oblique height angle a of the outer quadrangular pyramid is greater than the oblique height angle b of the inner quadrangular pyramid, and the height of the outer quadrangular pyramid is less than the height of the inner quadrangular pyramid. In this embodiment, the specification of the square boundary is 3 / 8 inch, the oblique height angle a of the outer quadrangular pyramid is 81°, the oblique height angle b of the inner quadrangular pyramid is 74°, the height of the outer quadrangular pyramid is 3.5mm, the height of the inner quadrangular pyramid is 5.0mm, the specification of the square column is 3 / 8 inch, and the height of the square column is 2mm.

[0023] like Figure 2 As shown, Figure 2 Figure I in the figure is the tilting mode, the square ball head 11 of the joint matches the square tenon 13 of the sleeve 12, the inner wall of the square tenon is provided with a groove adapted to the positioning steel ball, the square column on the joint is outside the sleeve, in the tilting mode, the maximum angle at which the joint can be tilted relative to the sleeve is 16°. Figure 2 Figure II in the figure is a straight line mode, and the extended cylindrical surface 4 formed by the square column and the square boundary of the joint is completely matched with the square tenon of the sleeve. At this time, the joint and the sleeve are coaxial. Example

[0024] like Figure 3 Figure 4As shown, a universal connector includes a female seat 16, a joint body 14 and a connecting structure connecting the female seat and the joint body. A square tenon 13 is provided on the female seat, and a square ball head 11 is provided on the joint body. The opposite ends of the female seat and the joint body are in a connecting fork structure. The side of the connecting fork is in a V-shape with a rounded bottom, and the opposite connecting forks are cross-hinged with the connecting structure. The connecting structure is a square connecting column 15, and the two ends of the connecting column are respectively plugged into the connecting fork on the joint body and the connecting fork on the female seat, and the connecting fork is hinged to the connecting column through a pin shaft. The two pin shafts on the connecting column are perpendicular to each other and in different planes. The pin shaft of the articulated female seat is outside the joint body, and the pin shaft of the articulated joint body is outside the female seat.

[0025] The structure of the square ball head of the universal connector refers to the structure of the square ball head in Example 1.

[0026] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent transformation made to the above embodiment based on the technical essence of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A joint with a square ball head, characterized in that: The invention comprises a joint body (1), one end of which is provided with a square tenon (13) for connecting a wrench head, the other end of which is provided with a square ball head (11) connected to a sleeve, the square ball head being provided with a retractable positioning steel ball (8), the positioning steel ball being located at a square boundary (6) of the maximum size of the square ball head, the two sides of the square boundary being in a four-sided pyramid structure, the axial cross-section of the square ball head being a square; a square column (3) being provided at the joint portion between the square ball head and the joint body, the size of the square column being the same as the size of the square boundary, the square column and the square boundary being combined to form an extended cylindrical surface (4), and a square neck (9) being provided between the square ball head and the square column.

2. A joint with a square ball head according to claim 1, characterized in that: The quadrangular pyramid on the end side of the square boundary is an outer quadrangular pyramid (7), and the quadrangular pyramid on the other side of the square boundary is an inner quadrangular pyramid (5). The oblique height angle of the outer quadrangular pyramid is greater than the oblique height angle of the inner quadrangular pyramid, and the height of the outer quadrangular pyramid is less than the height of the inner quadrangular pyramid.

3. A joint with a square ball head according to claim 1 or 2, characterized in that: A transition section (10) is provided between the square neck and the square column. The transition section is a cubic structure with a concave curved surface on the outside, and the axis of the concave curved surface is perpendicular to the axis of the joint body.

4. A joint with a square ball head according to claim 1 or 2, characterized in that: The edges of the square ball head are transitioned by a facet structure.

5. A universal connector using the square ball head according to any one of claims 1 to 4, characterized in that: The invention comprises a female seat (16), a joint body (14) and a connecting structure connecting the female seat and the joint body, wherein the female seat is provided with a square tenon (13), the joint body is provided with a square ball head (11), the opposite ends of the female seat and the joint body are in a connecting fork structure, and the opposite connecting forks and the connecting structure are cross-hinged; a retractable positioning steel ball (8) is provided on the square ball head, the positioning steel ball is located at a square boundary (6) of the maximum size of the square ball head, the two sides of the square boundary are in a four-sided pyramid structure, and the axial cross section of the square ball head is a square; a square column (3) is provided at the connecting portion between the square ball head and the joint body, the size of the square column is the same as the size of the square boundary, the square column and the square boundary are combined to form an extended cylindrical surface (4), and a square neck (9) is provided between the square ball head and the square column.

6. A universal connector according to claim 5, characterized in that: The quadrangular pyramid on the end side of the square boundary is an outer quadrangular pyramid, and the quadrangular pyramid on the other side of the square boundary is an inner quadrangular pyramid. The oblique height angle of the outer quadrangular pyramid is greater than the oblique height angle of the inner quadrangular pyramid, and the height of the outer quadrangular pyramid is less than the height of the inner quadrangular pyramid.

7. A universal connector according to claim 6, characterized in that: The connection structure is a square connection column (15), the two ends of which are respectively plugged into the connection fork on the joint body and the connection fork on the female seat, and the connection fork and the connection column are hinged via a pin.

8. A universal connector according to claim 7, characterized in that: The two pins on the connecting column are perpendicular to each other and in different planes, the pin of the hinged female seat is located outside the joint body, and the pin of the hinged joint body is located outside the female seat.

9. A universal connector according to claim 5, 6, 7 or 8, characterized in that: A transition section is provided between the square neck and the square column. The transition section is a cubic structure with a concave surface on the outside, and the axis of the concave surface is perpendicular to the axis of the joint body.

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