A universal ball and a method for constructing a receiving groove thereof

Abstract

The present invention discloses a universal ball and a method for constructing a receiving groove thereof. In the universal ball of the present application, a plurality of secondary balls are filled between a main ball and a groove surface of the receiving groove. The plurality of secondary balls include a plurality of first secondary balls and a plurality of second secondary balls. The plurality of first secondary balls are circumferentially distributed around the central axis of the receiving groove. The main ball abuts against each of the first secondary balls, respectively, and a gap is left between the main ball and the second secondary balls. Therefore, when the universal ball of the present application is used, friction is only generated between the main ball and the first secondary balls during the rotation process, and the main ball is less obstructed during the rotation process, thereby improving the smoothness of the main ball during the rotation process.

Description

Technical Field

[0001] The invention relates to the technical field of universal joints, and in particular to a universal ball and a construction method of a receiving groove thereof. Background Art

[0002] Universal balls are also called universal conveyor balls or universal rollers. As universal balls can roll flexibly, objects such as work plates and material boxes running on them can slide more flexibly, thereby greatly reducing the difficulty for workers to drive work plates, material boxes and other objects to move. In the machinery manufacturing industry, universal balls are widely used in auxiliary equipment such as transmission systems, feeding systems, processing systems, processing machinery and packaging machinery.

[0003] In the related technology, the universal ball includes a shell, a main ball and multiple secondary balls. The shell is provided with a receiving groove. The main ball is rotatably arranged in the receiving groove. The secondary balls are filled between the groove wall of the receiving groove and the main ball. When the universal ball is working, the main ball can rotate relative to the secondary balls.

[0004] However, since the secondary ball needs to be completely filled between the groove wall of the accommodating groove and the main ball, the main ball will be subjected to greater friction from the secondary ball during the rotation process, thereby affecting the smoothness of the main ball during the rotation process. Summary of the invention

[0005] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art. In a first aspect, the present invention provides a universal ball with a main ball that rotates more smoothly. In a second aspect, the present invention also provides a method for constructing a receiving groove.

[0006] According to the first aspect of the present invention, a universal ball is provided in an embodiment, comprising a shell, a main ball and a plurality of secondary balls; a receiving groove is provided in the shell; the main ball is rotatably arranged in the receiving groove and at least partially extends out of the receiving groove; the secondary balls are rotatably arranged in the receiving groove and are arranged in contact with the groove wall of the receiving groove, the plurality of secondary balls comprise a plurality of first secondary balls and a plurality of second secondary balls, the plurality of first secondary balls are circumferentially distributed around the central axis of the receiving groove, the main ball is respectively in contact with each of the first secondary balls, and a gap is left between the main ball and the second secondary balls.

[0007] The universal ball described in the present invention has at least the following beneficial effects: in the universal ball of the present application, a plurality of secondary balls are filled between the main ball and the groove surface of the accommodating groove, the plurality of secondary balls include a plurality of first secondary balls and a plurality of second secondary balls, the plurality of first secondary balls are circumferentially distributed around the central axis of the accommodating groove, the main ball abuts against each first secondary ball respectively, and a gap is left between the main ball and the second secondary balls, so that when the universal ball of the present application is used, the main ball only generates friction with the first secondary balls during the rotation process, the main ball encounters less obstruction during the rotation process, thereby improving the smoothness of the main ball during the rotation process.

[0008] According to the universal ball described in the embodiment of the first aspect of the present invention, the groove wall of the accommodating groove has a contact area abutting against the first secondary ball, the vertical distance between the contact area and the central axis of the accommodating groove is a first distance, and there is a second distance between the contact area and the center of the main ball, and the second distance is twice the first distance in value.

[0009] According to the universal ball described in the embodiment of the first aspect of the present invention, along the extension direction of the central axis of the accommodating groove, the secondary ball is spaced from the notch of the accommodating groove by a third distance.

[0010] According to the universal ball described in the embodiment of the first aspect of the present invention, the groove depth of the accommodating groove is a fourth distance, and the fourth distance is four times the third distance in value.

[0011] According to the universal ball described in the embodiment of the first aspect of the present invention, the main ball and the second secondary ball are spaced apart by a fifth distance, and the fifth distance is numerically smaller than the radius of the second secondary ball.

[0012] According to the universal ball transfer device described in the embodiment of the first aspect of the present invention, a waste discharge hole is provided at the bottom of the receiving groove.

[0013] According to the universal ball described in the embodiment of the first aspect of the present invention, the shell includes a supporting seat and a fixed seat, the supporting seat is formed with a receiving groove, the fixed seat is provided with a receiving cavity, the bottom of the receiving cavity is provided with a through hole, the diameter of the through hole is smaller than the diameter of the main ball, the supporting seat is detachably installed in the receiving cavity, and the main ball part extends out of the receiving cavity through the through hole.

[0014] According to the universal ball described in the embodiment of the first aspect of the present invention, the shell also includes a retaining ring, which is arranged at one end of the accommodating cavity close to the cavity opening of the accommodating cavity, abuts against the fixing seat, and is used to prevent the fixing seat from leaving the accommodating cavity.

[0015] According to a second aspect of the present invention, a method for constructing a receiving groove of a universal ball as provided in the first aspect of the present invention is provided. The radius of the main ball is r1, the radius of the secondary ball is r2, and the method for constructing the receiving groove comprises the following steps:

[0016] Obtaining an angle α between a line connecting the center of the first secondary ball and the center of the primary ball and the center of the receiving groove;

[0017] Obtaining an angle β between a line connecting the center of the third secondary ball and the center of the main ball relative to the center axis of the receiving groove, and obtaining a distance l1 between the third secondary ball and the main ball, wherein the third secondary ball is one of the plurality of second secondary balls;

[0018] Obtain an angle γ of a line between the center of the fourth secondary ball and the center of the main ball relative to the central axis of the receiving groove, and obtain a distance l2 between the third secondary ball and the main ball, wherein the fourth secondary ball is one of the plurality of second secondary balls, and in the universal ball, the third secondary ball and the fourth secondary ball are distributed along the extension direction of the central axis of the receiving groove;

[0019] Get the depth h1 of the receiving groove;

[0020] Establish a spatial rectangular coordinate system OXYZ;

[0021] In the plane rectangular coordinate system OXZ, set three points A, B, and C, where the coordinates of point A are

[0022] (X1, Y1), X1 = -(r1+2r2)sinα, Y1 = -(r1+2r2)cosα, the coordinates of point B are (X2, Y2), X2 = -(r1+l1+2r2)sinβ, Y2 = -(r1+l1+2r2)cosβ, the coordinates of point C are (X3, Y3), X3 = -(r1+l2+2r2)sinγ, Y3 = -(r1+l2+2r2)

[0023] cosγ;

[0024] Establish a preset arc passing through the three points A, B and C simultaneously in the second and third quadrants of the plane rectangular coordinate system OXZ;

[0025] In the spatial rectangular coordinate system OXYZ, with the Z axis as the rotation axis, rotate the preset arc to obtain the preset model;

[0026] In the spatial rectangular coordinate system OXYZ, a preset plane perpendicular to the Z axis cross-cuts the preset model to construct a receiving groove, wherein a vertical distance between one end of the preset model in the negative direction of the Z axis and the preset plane is h1.

[0027] According to the method for constructing a receiving groove described in an embodiment of the second aspect of the present invention, l1=l2, β=0°, γ=90°.

[0028] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention is further described below in conjunction with the accompanying drawings and embodiments;

[0030] Figure 1 A schematic structural diagram of a universal ball according to an embodiment of the present invention;

[0031] Figure 2 for Figure 1 A schematic structural diagram of a fixing seat of a universal ball shown;

[0032] Figure 3 A flowchart of a method for constructing a receiving groove of a universal ball according to an embodiment of the present invention;

[0033] Figure 4A schematic diagram of the distribution of the main ball and the secondary ball in the receiving groove according to an embodiment of the present invention;

[0034] Figure 5 It is a schematic diagram of the structure of a plane rectangular coordinate system OXZ for constructing a preset circular arc in one embodiment of the present invention.

[0035] Reference numerals:

[0036] Shell 100; support base 110; receiving groove 111; waste discharge hole 112; fixing base 120; receiving cavity 121; through hole 121a; snap-fit ​​groove 121b; retaining ring 130;

[0037] cue ball 200;

[0038] Secondary ball 300; first secondary ball 300A; second secondary ball 300B; third secondary ball 300C; fourth secondary ball 300D. DETAILED DESCRIPTION

[0039] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0040] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0041] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0042] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0043] Reference below Figure 1 and Figure 2 The universal ball transfer device according to the first aspect of the present invention will be described in detail.

[0044] refer to Figure 1 , a universal ball according to an embodiment of the present invention includes a shell 100, a main ball 200 and a plurality of sub-balls 300.

[0045] A receiving groove 111 is provided in the shell 100; the main ball 200 is rotatably provided in the receiving groove 111 and at least partially extends out of the receiving groove 111; the secondary ball 300 is rotatably provided in the receiving groove 111 and is arranged in contact with the groove wall of the receiving groove 111, and the multiple secondary balls 300 include multiple first secondary balls 300A and multiple second secondary balls 300B. The multiple first secondary balls 300A are circumferentially distributed around the central axis of the receiving groove 111, and the main ball 200 is respectively abutted against each first secondary ball 300A, and a gap is left between the main ball 200 and the second secondary ball 300B.

[0046] For example, Figure 1 As shown, a receiving groove 111 with an upward opening is provided in the housing 100, the groove wall of the receiving groove 111 is an arc surface, and the receiving groove 111 has a vertically extending central axis. The main ball 200 is rotatably arranged in the receiving groove 111, and the main ball 200 partially extends upward from the notch of the receiving groove 111. A plurality of secondary balls 300 are filled between the main ball 200 and the groove wall of the receiving groove 111. The secondary balls 300 are rotatably arranged in the receiving groove 111, and the plurality of secondary balls 300 include a plurality of A secondary ball 300A and a plurality of second secondary balls 300B, the plurality of first secondary balls 300A are circumferentially distributed around the central axis of the accommodating groove 111, and the main ball 200 is respectively in contact with each first secondary ball 300A, among the plurality of second secondary balls 300B, some of the second secondary balls 300B are located at the lower side of the first secondary ball 300A, and other parts of the second secondary balls 300B are located at the upper side of the first secondary ball 300A, and there is a gap between the main ball 200 and each second secondary ball 300B.

[0047] It should be noted that if the main ball 200 is in contact with all the secondary balls 300, during the rotation of the main ball 200, although there is rolling friction between the main ball 200 and the secondary balls 300, since each secondary ball 300 is in contact with the main ball 200, the friction encountered by the main ball 200 during the rotation is relatively large, which makes it easy for the main ball 200 to get stuck during the rotation, affecting the smoothness of the main ball 200 during the rotation.

[0048] It can be understood that in the universal ball of the present invention, since the main ball 200 is in contact with each first secondary ball 300A, and there is a gap between the main ball 200 and each second secondary ball 300B, when the universal ball 200 is in use, the main ball 200 only generates rolling friction with the first secondary ball 300A when the main ball 200 rotates, thereby greatly reducing the friction resistance encountered by the main ball 200 during the rotation process, so as to improve the fluidity of the main ball 200 during the rotation process.

[0049] It can be understood that since multiple first secondary balls 300A are circumferentially distributed around the central axis of the accommodating groove 111, and the main ball 200 is in contact with each first secondary ball 300A, the main ball 200 can be evenly in contact with each first secondary ball 300A, and the main ball 200 can be subjected to more uniform force during rotation, so as to increase the service life of the main ball 200 and improve the stability of the main ball 200 during rotation, thereby improving the overall stability of the universal ball of the present invention and the load-bearing capacity of the product.

[0050] It should be noted that, during the operation of the universal ball of the present invention, the secondary ball 300 is constantly moving in the receiving groove 111, that is, in the universal ball of the present invention, the first secondary ball 300A is not always certain secondary balls 300. Among the multiple secondary balls 300 in the receiving groove 111, the secondary ball 300 that is in contact with the groove wall of the receiving groove 111 and the main ball 200 at the same time is the first secondary ball 300A, and the remaining other secondary balls are the second secondary balls 300B. Here, the state in which a certain secondary ball 300 is in contact with the groove wall of the receiving groove 111 and the main ball 200 at the same time is defined as the first state, and the state in which there is a certain gap between a certain secondary ball 300 and the main ball 200 is defined as the second state. For example, when a certain secondary ball 300 in the receiving slot 111 is in the first state, this secondary ball 300 is the first secondary ball 300A; when a certain secondary ball 300 in the receiving slot 111 is in the second state, this secondary ball 300 is the second secondary ball 300B; when a certain secondary ball 300 in the receiving slot 111 is switched from the first state to the second state, during this process, this secondary ball 300 is changed from the first secondary ball 300A to the second secondary ball 300B; when a certain secondary ball 300 in the receiving slot 111 is switched from the second state to the first state, during this process, this secondary ball 300 is changed from the second secondary ball 300B to the first secondary ball 300A.

[0051] In some embodiments of the present invention, the groove wall of the accommodating groove 111 has a contact area abutting against the first secondary ball 300A, the vertical distance between the contact area and the central axis of the accommodating groove 111 is a first distance, and there is a second distance between the contact area and the center of the main ball 200, and the second distance is twice the first distance in value.

[0052] For example, Figure 1As shown, the area on the groove wall of the accommodating groove 111 that abuts against the first secondary ball 300A is the abutment zone. Since the first secondary balls 300A are circumferentially distributed around the central axis of the accommodating groove 111, the abutment zone is a ring arranged around the central axis of the accommodating groove 111. Since the vertical distance between the abutment zone and the central axis of the accommodating groove 111 is the first distance, there is a second distance between the abutment zone and the center of the main ball 200, and the second distance is twice the first distance in value, so that any two points on the abutment zone that are symmetrical about the central axis of the accommodating groove 111 and the center of the main ball 200 together form an equilateral triangle.

[0053] It can be understood that, compared with other types of triangles, the equilateral triangle has higher stability, so that the main ball 200 is more stable during rotation, and thus the universal ball of the present invention has higher stability and higher load-bearing capacity for the product.

[0054] In some embodiments of the present invention, along the extension direction of the central axis of the receiving groove 111 , the secondary ball 300 is spaced apart from the notch of the receiving groove 111 by a third distance.

[0055] For example, Figure 1 As shown, the notch of the receiving groove 111 faces upward, and among all the secondary balls 300 , the highest secondary ball 300 is spaced a third distance from the notch of the receiving groove 111 .

[0056] It should be noted that if the secondary ball 300 is completely filled between the main ball 200 and the groove wall of the accommodating groove 111, there will be a large pressure between each secondary ball 300, and correspondingly, there will be a large friction between each secondary ball 300. In this case, during the operation of the universal ball, due to the large friction between each secondary ball 300, it is difficult for the secondary ball 300 to rotate. During the rotation of the main ball 200, the friction between the main ball 200 and the secondary ball 300 is in the form of sliding friction, which will greatly increase the resistance of the main ball 200 during the rotation process, thereby causing the main ball 200 to frequently get stuck during the operation of the universal ball.

[0057] It can be understood that, since there is a third distance between the secondary ball 300 and the slot of the receiving slot 111, after the main ball 200 and the secondary ball 300 are installed in the receiving slot 111, there is still a certain amount of space in the receiving slot 111 to facilitate the rotation of the secondary ball 300. The setting of the extra space in the receiving slot 111 can reduce the pressure between each secondary ball 300, thereby reducing the friction between any two adjacent secondary balls 300. During the rotation of the main ball 200, the secondary ball 300 can rotate smoothly driven by the main ball 200. At this time, the friction between the main ball 200 and the secondary ball 300 is in the form of rolling friction. Compared with sliding friction, the main ball 200 can be subjected to less resistance from the secondary ball 300, and the main ball 200 can rotate more smoothly in the receiving slot 111. Accordingly, during the operation of the universal ball of the present application, the probability of the main ball 200 getting stuck can be smaller.

[0058] In a further embodiment of the present invention, the depth of the accommodating groove 111 is a fourth distance, and the fourth distance is four times the third distance in value.

[0059] It should be noted that if the movable space of the secondary ball 300 in the receiving groove 111 is too small, at this time, the pressure between the two adjacent secondary balls 300 is relatively large, and the friction between the two adjacent secondary balls 300 is relatively large. During the operation of the universal ball, it is difficult for the secondary ball 300 to rotate, which causes the main ball 200 to frequently get stuck due to the excessive friction between the secondary ball 300 and the secondary ball 300; if the movable space of the secondary ball 300 in the receiving groove 111 is too large, at this time, during the operation of the universal ball, it is difficult for the secondary ball 300 to always keep in contact with the groove wall of the receiving groove 111, and the secondary balls 300 are prone to stacking and getting stuck in the receiving groove 111, thereby affecting the normal operation of the universal ball.

[0060] It can be understood that, in the universal ball of the present invention, since there is a third distance between the secondary ball 300 and the slot of the accommodating slot 111, the slot depth of the accommodating slot 111 is a fourth distance, and the fourth distance is four times the third distance in value. Therefore, under the premise of ensuring that there is space in the accommodating slot 111 to allow the secondary ball 300 to move normally, the probability of the secondary ball 300 being stacked and stuck can be reduced.

[0061] In some embodiments of the present invention, the main ball 200 is spaced apart from the second secondary ball 300B by a fifth distance, and the fifth distance is smaller in value than the radius of the second secondary ball 300B.

[0062] It is understandable that the second secondary ball 300B needs to be spaced from the main ball 200 by the fifth distance. If the fifth distance is too large, other second secondary balls 300B may be easily stuck in the gap between the second secondary ball 300B and the main ball 200, and even the first secondary ball 300A may be misplaced and stuck in the gap between the second secondary ball 300B and the main ball 200, thereby causing the secondary balls 300 to be stacked and stuck with each other.

[0063] In the universal ball of the present embodiment, since the main ball 200 and the second secondary ball 300B are separated by the fifth distance, and the fifth distance is numerically smaller than the radius of the second secondary ball 300B, it is difficult to insert other secondary balls 300 into the gap between the second secondary ball 300B and the main ball 200, thereby reducing the probability of the secondary balls 300 being stacked and stuck with each other.

[0064] In some embodiments of the present invention, reference Figure 1 A waste discharge hole 112 is provided at the bottom of the receiving groove 111 .

[0065] It should be noted that during the operation of the universal ball, impurities will enter the receiving groove 111. As time goes by, more and more impurities will accumulate in the receiving groove 111. These impurities will not only occupy the activity space of the main ball 200 and the secondary ball 300 in the receiving groove 111, but also the impurities will adhere to the groove surface of the receiving groove 111, the spherical surface of the secondary ball 300 and the spherical surface of the main ball 200. On the one hand, it will affect the smoothness of the rotation of the secondary ball 300 and the main ball 200, and on the other hand, it will also increase the resistance encountered by the secondary ball 300 and the main ball 200 during rotation.

[0066] In the universal ball of the present embodiment, a waste discharge hole 112 is provided at the bottom of the receiving groove 111. During the operation of the universal ball of the present application, the main ball 200 and the secondary ball 300 will rotate, so that the impurities in the receiving groove 111 can continuously move driven by the main ball 200 and the secondary ball 300. With the assistance of the gravity of the impurities themselves, the impurities in the receiving groove 111 can gradually move to the waste discharge hole 112 and be discharged from the receiving groove 111 through the waste discharge hole 112.

[0067] It is understandable that by opening the waste discharge hole 112 at the bottom of the receiving groove 111, impurities falling into the receiving groove 111 can be discharged from the receiving groove 111 in time through the waste discharge hole 112, so as to reduce the influence of the impurities on the universal ball of the present application.

[0068] In some embodiments of the present invention, the shell 100 includes a support seat 110 and a fixed seat 120, a receiving groove 111 is formed on the support seat 110, a receiving cavity 121 is provided on the fixed seat 120, a through hole 121a is provided at the bottom of the receiving cavity 121, a diameter of the through hole 121a is smaller than the diameter of the main ball 200, the support seat 110 is detachably installed in the receiving cavity 121, and the main ball 200 partially extends out of the receiving cavity 121 through the through hole 121a.

[0069] For example, Figure 1 and Figure 2 As shown, the shell 100 includes a supporting seat 110 and a fixing seat 120, a receiving groove 111 is formed on the supporting seat 110, and a receiving cavity 121 is provided on the fixing seat 120, the cavity mouth of the receiving cavity 121 is set downward, and the cavity bottom of the receiving cavity 121 is provided with an upward through hole 121a, and the diameter of the through hole 121a is smaller than the diameter of the main ball 200, the supporting seat 110 is detachably installed in the receiving cavity 121, and the notch of the receiving groove 111 is connected with the through hole 121a of the receiving cavity 121, and the main ball 200 in the receiving groove 111 passes through the notch of the receiving groove 111 and the through hole 121a of the receiving cavity 121 in turn and extends out of the receiving cavity 121.

[0070] Furthermore, when assembling the universal ball of the present invention, the staff can first assemble the secondary ball 300 into the receiving groove 111 of the support seat 110, and then assemble the main ball 200 into the receiving groove 111 of the support seat 110, and then assemble the support seat 110 from the cavity mouth of the receiving cavity 121 to the receiving cavity 121 of the fixed seat 120, and make the main ball 200 extend upward from the receiving cavity 121 from the through hole 121a of the receiving cavity 121.

[0071] In a further embodiment of the present invention, the housing 100 further comprises a retaining ring 130 , which is disposed at one end of the accommodating cavity 121 close to the cavity opening of the accommodating cavity 121 , abuts against the fixing seat 120 , and is used to prevent the fixing seat 120 from escaping from the accommodating cavity 121 .

[0072] For example, Figure 2 As shown, an annular snap-in groove 121 b is provided on the cavity wall adjacent to the cavity opening of the accommodating cavity 121, and the retaining ring 130 is snapped into the snap-in groove 121 b. The upper end of the retaining ring 130 abuts against the support seat 110 to prevent the support seat 110 from detaching from the cavity opening of the accommodating cavity 121.

[0073] It is understandable that after the staff installs the support seat 110 in the accommodating cavity 121 of the fixing seat 120 , the staff can insert the retaining ring 130 into the snap-in groove 121b of the cavity wall of the accommodating cavity 121 to limit the support seat 110 in the accommodating cavity 121 through the retaining ring 130 .

[0074] Reference below Figures 3 to 5 The method for constructing the receiving groove 111 of the universal ball according to the second aspect of the embodiment of the present invention is described in detail.

[0075] refer to Figures 3 to 5 According to the method for constructing the receiving groove 111 of the universal ball provided by the second aspect of the present invention, the radius of the main ball 200 is r1, and the radius of the secondary ball 300 is r2. The construction method includes the following steps:

[0076] Step S100, obtaining an angle α between the center of the first secondary ball 300A and the center of the main ball 200 and the central axis of the receiving groove 111;

[0077] Step S200, obtaining an angle β between a line connecting the center of the third secondary ball 300C and the center of the main ball 200 and the central axis of the receiving groove 111, and obtaining a distance l1 between the third secondary ball 300C and the main ball 200, wherein the third secondary ball 300C is one of the plurality of second secondary balls 300B;

[0078] Step S300, obtaining an angle γ between a line connecting the center of the fourth secondary ball 300D and the center of the main ball 200 and the central axis of the receiving groove 111, and obtaining a distance l2 between the third secondary ball 300C and the main ball 200, wherein the fourth secondary ball 300D is one of the plurality of second secondary balls 300B, and in the universal ball, the third secondary ball 300C and the fourth secondary ball 300D are distributed along the extension direction of the central axis of the receiving groove 111;

[0079] Step S400, obtaining the groove depth h1 of the receiving groove 111;

[0080] Step S500, establishing a spatial rectangular coordinate system OXYZ;

[0081] Step S600: In the plane rectangular coordinate system OXZ, set three points A, B, and C, where the coordinates of point A are (X1, Y1), X1 = -(r1+2r2)sinα, Y1 = -(r1+2r2)cosα, and the coordinates of point B are (X2, Y2), X2 = -(r1+l1+2r2)sinβ, Y2 = -(r1+l1+2r2)

[0082] cosβ, the coordinates of point C are (X3, Y3), X3 = -(r1+l2+2r2)sinγ, Y3 = -

[0083] (r1+l2+2r2)cosγ;

[0084] Step S700, establishing a preset arc passing through the three points A, B, and C in the second and third quadrants of the plane rectangular coordinate system OXZ;

[0085] Step S800, in the spatial rectangular coordinate system OXYZ, with the Z axis as the rotation axis, rotating a preset arc to obtain a preset model;

[0086] Step S900, in the spatial rectangular coordinate system OXYZ, a preset plane perpendicular to the Z axis cross-cuts the preset model to construct the receiving groove 111, wherein the vertical distance between one end of the preset model in the negative direction of the Z axis and the preset plane is h1.

[0087] It should be noted that, in the universal ball of the present invention, among each secondary ball 300, only the first secondary ball 300A is in contact with the main ball 200, while there is a certain gap between the second secondary ball 300B and the main ball 200. In the construction method of the receiving groove 111 of the present invention, the curvature radius of the preset arc passing through the three points A, B, and C is greater than the curvature radius of the spherical surface of the main ball 200. That is, in the preset model, on the curve formed by the rotation of point A around the Z axis, the distance from each point to the origin of the spatial rectangular coordinate system is the sum of the values ​​of the diameter of the secondary ball 300 and the radius of the main ball 200. That is, after the receiving groove 111 is constructed from the preset model, there will be an annular abutment area in the receiving groove 111, and each secondary ball 300 attached to the abutment area will abut against the main ball 200, while the secondary balls 300 located in other areas outside the abutment area of ​​the receiving groove 111 will have a certain gap with the main ball 200.

[0088] It can be understood that in the construction method of the universal ball receiving groove 111 of the present invention, the receiving groove 111 is constructed based on the actual sizes of the main ball 200 and the secondary ball 300, so that the constructed receiving groove 111 can meet the requirements of the receiving groove 111 in the universal ball of the first aspect of the present invention, and the construction method of the universal ball receiving groove 111 of the present invention can standardize the manufacturing standards of the shell 100 in the universal ball, which is conducive to the standardization of the universal ball. For main balls 200 and secondary balls 300 of different specifications, the staff can use the construction method of the universal ball receiving groove 111 of the present invention to construct the receiving groove 111 that is suitable for the selected main ball 200 and secondary ball 300, so that the construction of the receiving groove 111 is more standardized and convenient.

[0089] In some embodiments of the present invention, l1=l2, β=0°, and γ=90°.

[0090] It can be understood that when l1=l2, β=0°, γ=90°, the third secondary ball 300C is just located at the bottom of the accommodating groove 111, and the center of the fourth secondary ball 300D is just in the same horizontal plane with the center of the main ball 200.

[0091] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A universal ball, characterized in that: include: A housing, wherein a receiving groove is provided in the housing; A main ball is rotatably disposed in the receiving slot and at least partially extends out of the receiving slot; A plurality of secondary balls are rotatably arranged in the receiving groove and arranged in contact with the groove wall of the receiving groove. The plurality of secondary balls include a plurality of first secondary balls and a plurality of second secondary balls. The plurality of first secondary balls are circumferentially distributed around the central axis of the receiving groove. The main ball is respectively in contact with each of the first secondary balls, and a gap is left between the main ball and the second secondary balls.

2. A universal ball transfer device according to claim 1, characterized in that: The groove wall of the accommodating groove has a contact area that abuts the first secondary ball, the vertical distance between the contact area and the central axis of the accommodating groove is a first distance, and there is a second distance between the contact area and the center of the main ball, and the second distance is twice the first distance in value.

3. A universal ball transfer device according to claim 1, characterized in that: Along the extending direction of the central axis of the accommodating groove, the secondary ball is spaced from the notch of the accommodating groove by a third distance.

4. A universal ball transfer device according to claim 3, characterized in that: The groove depth of the accommodating groove is a fourth distance, and the fourth distance is four times the third distance in value.

5. The universal ball according to claim 1, characterized in that: The main ball and the second secondary ball are spaced apart by a fifth distance, and the fifth distance is numerically smaller than a radius of the second secondary ball.

6. A universal ball transfer device according to claim 1, characterized in that: The bottom of the containing tank is provided with a waste discharge hole.

7. A universal ball transfer device according to claim 1, characterized in that: The shell includes a supporting seat and a fixing seat, the supporting seat is formed with the accommodating groove, the fixing seat is provided with an accommodating cavity, the bottom of the accommodating cavity is provided with a through hole, the diameter of the through hole is smaller than the diameter of the main ball, the supporting seat is detachably installed in the accommodating cavity, and the main ball part extends out of the accommodating cavity through the through hole.

8. A universal ball transfer device according to claim 7, characterized in that: The housing further comprises a retaining ring, The retaining ring is arranged at one end of the accommodating cavity close to the cavity opening of the accommodating cavity, and the retaining ring abuts against the fixing seat and is used to prevent the fixing seat from being separated from the accommodating cavity.

9. A method for constructing a receiving groove of a universal ball according to any one of claims 1 to 8, characterized in that: The radius of the main ball is r1, the radius of the secondary ball is r2, and the construction method includes the following steps: Obtaining an angle α between a line connecting the center of the first secondary ball and the center of the primary ball and a center axis of the receiving groove; Obtaining an angle β between a line connecting the center of a third secondary ball and the center of the main ball relative to the central axis of the receiving groove, and obtaining a distance l1 between the third secondary ball and the main ball, wherein the third secondary ball is one of the plurality of the second secondary balls; Obtaining an angle γ of a line between the center of the fourth secondary ball and the center of the main ball relative to the central axis of the receiving groove, and obtaining a distance l2 between the third secondary ball and the main ball, wherein the fourth secondary ball is one of the plurality of the second secondary balls, and in the universal ball, the third secondary ball and the fourth secondary ball are distributed along the extension direction of the central axis of the receiving groove; Obtaining a groove depth h1 of the receiving groove; Establish a spatial rectangular coordinate system OXYZ; In the plane rectangular coordinate system OXZ, three points A, B, and C are set, among which the coordinates of point A are (X1, Y1), X1 = -(r1+2r2)sinα, Y1 = -(r1+2r2)cosα, the coordinates of point B are (X2, Y2), X2 = -(r1+l1+2r2)sinβ, Y2 = -(r1+l1+2r2)cosβ, and the coordinates of point C are (X3, Y3), X3 = -(r1+l2+2r2)sinγ, Y3 = -(r1+l2+2r2) cosγ; Establish a preset arc passing through the three points A, B and C simultaneously in the second and third quadrants of the plane rectangular coordinate system OXZ; In the spatial rectangular coordinate system OXYZ, the preset arc is rotated with the Z axis as the rotation axis to obtain a preset model; In the spatial rectangular coordinate system OXYZ, the preset model is cross-sectioned by a preset plane perpendicular to the Z axis to construct the receiving groove, wherein the vertical distance between one end of the preset model in the negative direction of the Z axis and the preset plane is h1.

10. The method for constructing a receiving tank according to claim 9, characterized in that: l1=l2, β=0°, γ=90°.

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