Ball cage type synchronous universal coupling and body thereof

Abstract

The ball cage type synchronous universal coupling body is composed of an outer sleeve, a retainer, steel balls and an inner sleeve, the retainer is arranged between the inner spherical surface of the outer sleeve and the outer spherical surface of the inner sleeve, N window holes are formed in the retainer in the circumferential direction, and the N steel balls are embedded into the window holes of the retainer in a win-win mode. The N inner grooves are formed in the inner surface of the outer sleeve, and the N outer grooves are formed in the outer spherical surface of the inner sleeve; the inner spherical surface of the outer sleeve is concentric with the outer spherical surface of the retainer; the outer spherical surface of the inner sleeve is concentric with the inner spherical surface of the retainer; the outer sleeve inner spherical surface of the outer sleeve is in clearance fit with the retainer outer spherical surface, and the retainer rotates around the center of the retainer outer spherical surface by an angle; a cylindrical surface is arranged at the end part of the retainer inner ring; the outer spherical surface of the inner sleeve is in clearance fit with the inner spherical surface of the retainer, the inner sleeve rotates around the symmetric center O of the window hole by an angle, and the rotation angle of the retainer is 1 / 2 of that of the inner sleeve. The device has a fixed centering function, and the axial length is controllable, so that the requirements of different working conditions are met.

Description

TECHNICAL FIELD

[0001] The utility model relates to a coupling, in particular to a ball cage type synchronous universal coupling and its body. BACKGROUND

[0002] As a kind of mechanical transmission device, coupling is widely used in engineering machinery, metallurgy, mining, chemical industry, automobile industry and other industries, connects two rotating elements not in the same axis, and transmits power (mainly torque) and movement.Coupling can ensure the normal operation of equipment when there is a certain degree of angular deviation and axial displacement between the two rotating elements of the equipment.

[0003] Ball cage type synchronous universal coupling (hereinafter referred to as ball cage coupling) is a kind of coupling, which is widely used.The traditional straight channel type ball cage coupling, the inner and outer spherical surfaces of the retainer are eccentric structure, this structure is also called double offset type ball cage coupling or double effect compensation type ball cage coupling.The steel ball rotates and rolls or slides on the straight line channel on the inner surface of the outer sleeve and the outer surface of the inner sleeve, realizes the functions of rotation and expansion, transmits torque, and compensates the angular change and axial movement caused by the working and installation errors of the two shafts.Double offset type ball cage coupling is widely used in metallurgy, mining, petroleum and other industries due to its large angle compensation and wide torque transmission range.

[0004] Ball cage coupling is used as a component in large oil machinery, metallurgical equipment production line and other complex conditions composed of multiple components, and the input shaft and output shaft are mostly different in axis, surface, length, angle in X, Y, Z direction, due to the manufacturing error of each component, the length determined by design theory and the length used in actual field will have a big difference after assembly, and the space length change caused by manufacturing and installation cannot be accurately measured.When the space length and the space length of ball cage coupling do not correspond, the inner sleeve one, retainer one, steel ball one and shaft one assembled by collar one 5 are used, the steel ball one will always resist the stop ring or gland;When there is a height difference, the high end of the inner sleeve one, retainer one, steel ball one and shaft one assembled by collar one 5 will slide to the low end due to gravity, and the steel ball one 3 at the high end will always resist the stop ring one or gland.Under these two conditions, the steel ball one 3 of the ball cage coupling always resists the stop ring one and the gland, and the stop ring one or the gland is always subjected to the axial impact of the steel ball one 3, under this continuous impact, the stop ring F (or the gland) will be out of place, broken, and finally fail, resulting in the inner sleeve one, retainer one and steel ball one out of the outer sleeve one 1, and the ball cage coupling fails. SUMMARY

[0005] The purpose of the present utility model is to overcome the above-mentioned deficiencies of the prior art and to provide a ball cage type synchronous universal coupling and its body which has a fixed centering function and controllable axial length without a retaining ring F, so as to meet the requirements of different working conditions.

[0006] The technical solution of the utility model is: a ball cage type synchronous universal joint body, which is composed of an outer sleeve, a retainer, steel balls and an inner sleeve, the retainer is arranged between the outer sleeve inner spherical surface of the outer sleeve and the outer spherical surface of the inner sleeve, the retainer is provided with N window holes along the circumferential direction, the N steel balls are interference fit into the window holes of the retainer, and are simultaneously placed in N inner grooves on the inner surface of the outer sleeve and N outer grooves on the outer spherical surface of the inner sleeve; the outer sleeve inner spherical surface of the outer sleeve is concentric with the center of the outer spherical surface of the retainer; the outer sleeve outer spherical surface of the outer sleeve is clearance-matched with the outer spherical surface of the retainer, and the retainer rotates around the center of the outer spherical surface of the retainer; the inner ring end of the retainer is provided with a cylindrical surface; the outer spherical surface of the inner sleeve is clearance-matched with the inner spherical surface of the retainer, and the inner sleeve rotates around the symmetry center O of the window hole by an angle, and the retainer rotation angle is 1 / 2 of the inner sleeve rotation angle;

[0007] A loading and unloading groove is provided at the mouth of the outer jacket. The inner surface of the outer jacket consists of an inner cylindrical surface of the outer jacket and an inner spherical surface of the outer jacket. N inner grooves are provided in the outer jacket at equal distances along the circumference, and the length direction of the inner groove is parallel to the axis of the outer jacket. A channel wall is formed between any two adjacent inner grooves. The surface of the inner channel wall is composed of an inner cylindrical surface segment of the outer jacket and an inner spherical surface segment of the outer jacket connected to the inner cylindrical surface segment of the outer jacket. The limiting surface segment is located outside the inner spherical surface segment of the outer jacket. The inner cylindrical surface segments of the outer jacket on the surfaces of each channel wall are arranged in a ring to form an inner cylindrical surface of the outer jacket, and the inner spherical surface segments of the outer jacket on the surfaces of each channel wall are arranged in a ring to form an inner spherical surface of the outer jacket.

[0008] Two opposite ends of the channel walls are each provided with a groove for installing and removing the retainer to form a pair of loading and unloading grooves, and the distance between the pair of loading and unloading grooves is greater than the height between two opposite points on the outer spherical surface of the retainer on the retainer axis section.

[0009] The outer sleeve is provided with a stopper surface at its mouth, and each channel wall has a stopper surface segment at its end. These segments are arranged in a circular pattern to form a stopper surface. The outer sleeve mouth is chamfered to form the stopper surface, with a chamfer angle of 20 to 40 degrees. When the shaft rotates until it aligns with the stopper surface of the outer sleeve, the stopper surface provides the required position. If the shaft and outer sleeve do not align after rotation to the required dimension, the stopper can be used to provide the required position.

[0010] N evenly distributed mounting holes are provided on the end face of the outer sleeve, one mounting hole corresponds to one channel wall, and K circumferential teeth are provided on the outer circumference of the outer sleeve; N is an integer ≥ 6, and the number of circumferential teeth K is an integer multiple of N.

[0011] The outer spherical surface of the inner sleeve is provided with N outer grooves distributed at equal distances along the circumference. The length direction of the outer grooves is parallel to the axis of the inner sleeve. The inner hole of the inner sleeve is provided with a spline or a flat key.

[0012] The outer surface of the cage is an outer spherical surface of the cage, the spherical center of the outer spherical surface of the cage is B, the inner surface of the cage is an inner spherical surface of the cage, the spherical center of the inner spherical surface of the cage is A, the outer spherical surface of the cage and the inner spherical surface of the cage are coaxial and concentric, the spherical center of the inner spherical surface of the cage is offset to the left relative to the center of symmetry O of the cage window hole by a distance e, and the spherical center of the outer spherical surface of the cage is offset to the right relative to the center of symmetry O of the cage window hole by a distance e.

[0013] The diameter of the cylindrical surface is greater than the diameter of the inner spherical surface of the cage by 0.2-0.5 mm.

[0014] The installation steps are as follows:

[0015] ①The cage is aligned, the N outer spherical surfaces of the inner sleeve are aligned with the N window holes of the cage, the N channels of the inner sleeve are aligned with the N inner spherical surfaces of the cage, and the inner sleeve is installed from the cylindrical surface end of the cage;

[0016] ②The outer sleeve 7 is aligned, and the cage and the inner sleeve are vertically installed from the dismounting groove;

[0017] ③The outer spherical surface of the outer sleeve and the outer spherical surface of the cage, and the inner spherical surface of the cage and the outer spherical surface of the inner sleeve are matched in place;

[0018] ④The inner sleeve is rotated while driving the cage, and the steel balls are sequentially installed;

[0019] ⑤Check, installation is completed;

[0020] The dismounting steps can be operated in reverse.

[0021] A ball cage type synchronous universal coupling, comprising a shaft, both ends of the shaft are installed into the ball cage type synchronous universal coupling body through a ring.

[0022] A ball cage type synchronous universal coupling, characterized in that: comprising a shaft, one end of the shaft is installed into the ball cage type synchronous universal coupling body through a ring, the other end of the shaft is installed with a universal joint, or the other end of the shaft is installed with a straight channel type ball cage coupling through a ring, and the straight channel type ball cage coupling is provided with a check ring F.

[0023] The cage, the inner sleeve and the steel ball are randomly axially slid in the outer sleeve, the sliding amount and the sliding position are related to the installation working condition, and the specific positions of the cage, the inner sleeve and the steel ball in the outer sleeve are uncertain. The cage and the outer sleeve are spherical surface matched, the positions of the cage, the inner sleeve and the steel ball in the outer sleeve are fixed and cannot be axially slid, and the specific positions of the cage, the inner sleeve and the steel ball in the outer sleeve are determined. The traditional thinking mode is changed, the spherical surface matching constraint of the outer sleeve and the cage, the spherical surface matching constraint of the cage and the inner sleeve and the channel matching constraint are realized, the fixed structure mode of the double-biased ball cage is realized, the use requirement of the ball cage coupling under the specific working condition such as large torque is met, the use field of the ball cage coupling is expanded, and the market share of the ball cage coupling is enlarged. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a prior art structure schematic view;

[0025] Figure 2 It is a prior art outer sleeve structure schematic view;

[0026] Figure 3 It is a prior art cage structure schematic view;

[0027] Figure 4 It is a front view of the body of the utility model;

[0028] Figure 5 It is a left view of the body of the utility model;

[0029] Figure 6 It is an outer sleeve structure schematic view;

[0030] Figure 7 It is a cage structure schematic view;

[0031] Figure 8 It is a structure schematic view of the utility model Figure 1 ;

[0032] Figure 9 It is a structure schematic view of the utility model Figure 2 ;

[0033] Figure 1 In the figure, 1, outer sleeve one, 2, cage one, 3, steel ball one, 4, inner sleeve one, 5, ring one, 6, shaft one, F, baffle one;

[0034] In the figure, 7, the outer sleeve, 8, the retainer, 9, the steel ball, 10, the inner sleeve, 11, the spline or the key, 12, the outer sleeve inner cylindrical surface, 13, the outer sleeve inner spherical surface, 14, the limiting surface, 15, the dismounting groove, 16, the mounting hole, 17, the peripheral teeth, 18, the retainer outer spherical surface, 19, the retainer inner spherical surface, 20, the window hole, 21, the cylindrical surface, 22, the collar, 23, the shaft, e, the eccentric distance, A, the center of the inner sleeve 10 outer spherical surface (i.e. the center of the retainer inner spherical surface 19), B, the center of the outer sleeve 7 inner spherical surface (i.e. the center of the retainer outer spherical surface 18), O, the center of the window hole 20 symmetry. DETAILED DESCRIPTION

[0035] Figures 1-3 In the figure, the existing straight groove type ball cage coupling is composed of an outer sleeve 1, a retainer 2, a steel ball 3, an inner sleeve 4, a collar 5, a shaft 6 and a stop ring F. The inner surface of the outer sleeve 1 is composed of an inner cylindrical surface E and a groove G. The center A of the inner spherical surface of the retainer 2 is left offset relative to the center O of the window hole symmetry of the retainer 2. The center B of the outer spherical surface of the retainer 2 is right offset relative to the center O of the window hole symmetry of the retainer 2. In use, the inner sleeve 1, the retainer 2 and the steel ball 3 are assembled on the shaft 6 and are fixed by the collar 5, and can axially slide in the groove G of the outer sleeve 1. The position after sliding is randomly changed with the installation angle and length on site. If the height difference or the space length cannot be accurately measured or installation error exists on site, the high end of the inner sleeve 1, the retainer 2, the steel ball 3 and the shaft 1 assembled by the collar 5 will slide to the low end due to the action of gravity, and the steel ball 3 will hit the stop ring F (or the gland). When the stop ring F is broken or the gland is hit off, the inner sleeve 4, the retainer 2 and the steel ball 3 will be out of the outer sleeve 1, and the ball cage coupling is invalid.

[0036] Figure 4 、 5 In the figure, the body of the utility model is composed of an outer sleeve 7, a retainer 8, a steel ball 9 and an inner sleeve 10. N outer grooves are arranged on the outer spherical surface of the inner sleeve 10 and are equidistantly distributed along the circumference. The outer grooves are parallel to the axis and are equal in number to and correspond to the inner grooves of the outer sleeve 7. The inner hole of the inner sleeve 10 is provided with a spline 11 or a key, or other required connection mode. The retainer 8 is arranged between the outer sleeve inner spherical surface 13 of the outer sleeve 7 and the outer spherical surface of the inner sleeve 10. N steel balls 9 are embedded in the window hole 20 of the retainer 8 and are simultaneously arranged in the N inner grooves on the inner surface of the outer sleeve 7 and the N outer grooves on the outer spherical surface of the inner sleeve 10.

[0037] The outer sleeve inner spherical surface 13 of the outer sleeve 7 is concentric with the retainer outer spherical surface 18, which is point B; the outer spherical surface of the inner sleeve 10 is concentric with the retainer inner spherical surface 19, which is point A. The outer sleeve inner spherical surface 13 of the outer sleeve 7 is in clearance fit with the retainer outer spherical surface 18, and the retainer 8 rotates around the center of the retainer outer spherical surface 18 by an angle; the outer spherical surface of the inner sleeve 10 is in clearance fit with the retainer inner spherical surface 19, and the inner sleeve 10 rotates around the center of the window O by an angle, and the rotation angle of the retainer 8 is 1 / 2 of the rotation angle of the inner sleeve 10.

[0038] Figure 6 In the embodiment, the inner surface of the outer sleeve 7 is composed of an outer sleeve inner cylindrical surface 12 and an outer sleeve inner spherical surface 13, and N inner channels are arranged on the inner surface of the outer sleeve 7 at equal distances along the circumference, the inner channels are parallel to the axis, and N is an integer greater than or equal to 6; N mounting holes 16 are arranged on the outer sleeve 7, which correspond to the outer sleeve inner cylindrical surface 12 and the outer sleeve inner spherical surface 13 and are uniformly distributed, and K peripheral teeth 17 are arranged on the outer circumference of the outer sleeve 7, and the number K of the peripheral teeth 17 is an integral multiple of N; the width and depth of the peripheral teeth 17 are determined according to the equal strength theory. A limiting surface 14 is arranged at the opening of the outer sleeve 7 to limit the rotation angle of the ball cage coupling; a pair of mounting and dismounting grooves 15 are arranged at the opening of the outer sleeve 7 for mounting and dismounting the retainer 8.

[0039] Figure 7 In the embodiment, the outer surface of the retainer 8 is a retainer outer spherical surface 18 with a ball center B, and the inner surface of the retainer 8 is a retainer inner spherical surface 19 with a ball center A, the retainer outer spherical surface 18 and the retainer inner spherical surface 19 are coaxial and concentric, and the ball centers B and A of the retainer outer spherical surface 18 and the retainer inner spherical surface 19 are apart by 2 times the eccentric distance e. N window holes 20 are arranged on the retainer 8, and the retainer outer spherical surface 18 and the retainer inner spherical surface 19 are symmetrically arranged with respect to the symmetric center O of the window hole 20, that is, the distance between the center B of the retainer outer spherical surface 18 and the center A of the retainer inner spherical surface 19 and the symmetric center O of the window hole 20 is e, and OA=OB=e. A cylindrical surface 21 is arranged at the right end of the retainer 8, and the diameter of the cylindrical surface 21 is 0.2-0.5 mm larger than the diameter of the retainer inner spherical surface 19.

[0040] Figure 8 In the embodiment, the body composed of the outer sleeve 7, the retainer 8, the steel ball 9 and the inner sleeve 10 is sleeved on both ends of the shaft 23, and the two pairs of clamps 22 are fixed, which is used for the working condition of the ball cage coupling with fixed length and no expansion.

[0041] Figure 9 In the embodiment, the body composed of the outer sleeve 7, the retainer 8, the steel ball 9 and the inner sleeve 10 and the body composed of the outer sleeve 1, the retainer 2, the steel ball 3 and the inner sleeve 4 are respectively sleeved on both ends of the shaft 23, and the two pairs of clamps 22 are fixed, which is used for the working condition of the ball cage coupling with a certain length of expansion.

[0042] The installation steps are as follows:

[0043] ① keep the holder 8 in place, the N section of the outer spherical surface of the inner sleeve 10 to the N window hole 20 of the holder 8, the N channel of the inner sleeve 10 to the N inner spherical surface of the holder 8, the inner sleeve 10 from the holder cylindrical surface 21 end loaded;

[0044] ② keep the outer sleeve 7 in place, the holder 8 and the inner sleeve 10 from the loading and unloading slot 15 vertically loaded;

[0045] ③ the outer spherical surface 13 of the outer sleeve and the outer spherical surface 18 of the holder, the inner spherical surface 19 of the holder and the outer spherical surface of the inner sleeve 10 are matched in place;

[0046] ④ rotate the inner sleeve 10 while driving the holder 8, and sequentially load the steel ball 3;

[0047] ⑤ check, installation is completed;

[0048] During installation, a small copper rod can be used to knock the steel ball to assist assembly.

[0049] The disassembly steps can be operated in reverse.

[0050] The above only for the preferred embodiment of the present application, and not to limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application, should be included in the scope of protection of the present application.

Claims

1. A ball cage type constant velocity universal joint body characterized by: The application relates to a bearing, which is composed of an outer sleeve (7), a retainer (8), steel balls (9) and an inner sleeve (10), wherein the retainer (8) is arranged between the inner spherical surface (13) of the outer sleeve (7) and the outer spherical surface of the inner sleeve (10), the retainer (8) is provided with N window holes (20) in the circumferential direction, N steel balls (9) are embedded in the window holes (20) of the retainer (8) in an interference fit, and the N steel balls (9) are simultaneously arranged in N inner channels on the inner surface of the outer sleeve (7) and N outer channels on the outer spherical surface of the inner sleeve (10); the inner spherical surface (13) of the outer sleeve (7) is concentric with the center of the outer spherical surface (18) of the retainer; the outer spherical surface of the inner sleeve (10) is concentric with the center of the inner spherical surface (19) of the retainer; the inner spherical surface (13) of the outer sleeve (7) is in clearance fit with the outer spherical surface (18) of the retainer, and the retainer (8) rotates around the center of the outer spherical surface (18) of the retainer by an angle; the inner ring end of the retainer (8) is provided with a cylindrical surface (21); the outer spherical surface of the inner sleeve (10) is in clearance fit with the inner spherical surface (19) of the retainer, and the inner sleeve (10) rotates around the window hole symmetry center O by an angle, and the rotation angle of the retainer (8) is 1 / 2 of the rotation angle of the inner sleeve (10). The outer sleeve (7) is provided with a dismounting groove (15) at the mouth, the inner surface of the outer sleeve (7) is composed of an outer sleeve inner cylindrical surface (12) and an outer sleeve inner spherical surface (13), the outer sleeve (7) is internally provided with N inner channels which are equidistantly distributed along the circumference, and the length direction of the inner channels is parallel to the axis of the outer sleeve (7); any two adjacent inner channels form a channel wall, the surface of the inner channel wall is composed of an outer sleeve inner cylindrical surface section and an outer sleeve inner spherical surface section which is connected with the outer sleeve inner cylindrical surface section, and the limiting surface section is located outside the outer sleeve inner spherical surface section, the outer sleeve inner cylindrical surface sections of the surfaces of the channel walls are annularly arranged to form the outer sleeve inner cylindrical surface (12), and the outer sleeve inner spherical surface sections of the surfaces of the channel walls are annularly arranged to form the outer sleeve inner spherical surface (13).

2. The ball cage type universal joint body of claim 1, wherein: One end of each of two opposite channel walls is provided with a groove for mounting and dismounting the retainer (8) to form a pair of dismounting grooves (15).

3. The ball cage type universal joint body of claim 1, wherein: The outer sleeve (7) is provided with a limiting surface (14) at the mouth, and the end of each channel wall is provided with a limiting surface section, and the limiting surface sections of the ends of the channel walls are annularly arranged to form the limiting surface (14).

4. The ball cage type universal joint body of claim 1, wherein: The end surface of the outer sleeve (7) is provided with N mounting holes (16) which are equidistantly distributed, one mounting hole (16) corresponds to one channel wall, and the outer circumference of the outer sleeve (7) is provided with K peripheral teeth (17); N is an integer greater than or equal to 6, and the number K of the peripheral teeth (17) is an integral multiple of N.

5. The ball cage type universal joint body of claim 1, wherein: The outer spherical surface of the inner sleeve (10) is provided with N outer channels which are equidistantly distributed along the circumference, the length direction of the outer channels is parallel to the axis of the inner sleeve (10), and the inner hole of the inner sleeve (10) is provided with a spline (11) or a flat key.

6. The ball cage type universal joint body of Claim 1, wherein: The outer surface of the retainer (8) is an outer spherical surface (18) of the retainer, the center of the outer spherical surface (18) of the retainer is B, the inner surface of the retainer (8) is an inner spherical surface (19) of the retainer, the center of the inner spherical surface (19) of the retainer is A, the outer spherical surface (18) of the retainer and the inner spherical surface (19) of the retainer are coaxial and eccentric, the center of the inner spherical surface (19) of the retainer is offset to the left relative to the window hole symmetry center O of the retainer by a distance e, and the center of the outer spherical surface (18) of the retainer is offset to the right relative to the window hole symmetry center O of the retainer by a distance e.

7. The ball cage type universal joint body of Claim 1, wherein: The diameter of the cylindrical surface (21) is 0.2-0.5mm larger than the diameter of the inner spherical surface (19) of the cage.

8. A ball cage type universal joint coupling characterized by: The shaft (23) is inserted into the body of the ball cage type synchronous universal coupling of any one of claims 1-7 through the collar (22) at both ends.

9. A ball cage type constant velocity universal joint characterized by: The shaft (23) is inserted into the body of the ball cage type synchronous universal coupling of any one of claims 1-7 through the collar (22) at one end, and the other end of the shaft (23) is equipped with a universal joint, or the other end of the shaft (23) is inserted into a straight groove type ball cage coupling through the collar (5), and the straight groove type ball cage coupling is provided with a check ring F.

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