Ball cage type synchronous universal coupling

Abstract

A ball cage type synchronous universal coupling comprises an outer sleeve, an inner sleeve, a retainer and steel balls, the retainer is arranged between the outer sleeve and the inner sleeve, N windows are formed in the retainer, the N steel balls are embedded into the windows, and a taper sleeve is detachably connected into the inner sleeve through a screw assembly. Each mounting / dismounting hole used for being matched with the screw assembly is formed by combining a half unthreaded hole and a half threaded hole, and the mounting holes and the dismounting holes are alternately arranged; and an expansion joint is arranged on the taper sleeve. Through the arrangement of the mounting hole and the dismounting hole, the problems of mounting and dismounting of the ball cage coupling are effectively solved, the operation is simple, and special tools are not needed.

Description

Technical Field

[0001] The utility model relates to a coupling, in particular to a ball cage type synchronous universal coupling. Background Art

[0002] In the machinery manufacturing, metallurgy, automobile and other industries, the application of couplings is everywhere. It is a mechanical component that connects the driving shaft and the driven shaft in different mechanisms to rotate together while transmitting motion and torque.

[0003] The ball cage type synchronous universal coupling (hereinafter referred to as the ball cage coupling) has been optimized for nearly a hundred years, from the early Rzeppa type with indexing rod structure to the currently more widely used Birfield type, and the double-effect compensation ball cage coupling structure with axial relative sliding. The Birfield type ball cage coupling has arc grooves on the inner and outer sleeves. While transmitting torque, the outer sleeve and the inner sleeve can rotate relative to each other around the rotation center to compensate for the input and output shaft angle. The double-effect compensation ball cage coupling has straight grooves on the inner and outer sleeves. During the process of transmitting torque, the outer sleeve and the inner sleeve can move relative to each other in the axial direction and rotate relative to each other along the rotation center at the same time, and double-effect compensation is performed on the input and output shaft angles and telescopic lengths.

[0004] At present, the process of transmitting torque of the existing ball cage coupling is generally through fasteners, splines or flat keys, and the hole matching forms are mostly interference fit and transition fit. The installation and disassembly must be carried out by heating the inner hole and freezing the connecting shaft, and at the same time, a series of tools and equipment such as pullers and induction disassemblers are used. The cost is high, the time is long, the labor intensity is high, and the scale is slightly improper, which may cause damage to the parts. (See Figure 1 . ) Summary of the invention

[0005] The purpose of the utility model is to overcome the above-mentioned deficiencies of the prior art and to provide a ball cage type synchronous universal coupling which is convenient to install and disassemble, effectively solving the difficult problems of installing and disassembling the ball cage coupling, and is simple to operate without the need for special tooling.

[0006] The technical solution of the utility model is that it includes an outer sleeve, an inner sleeve, a retaining frame, and steel balls. The retaining frame is arranged between the outer sleeve and the inner sleeve. N windows are arranged on the retaining frame. N steel balls are embedded in the windows. The cone sleeve is detachably connected to the inner sleeve through a screw assembly. The mounting hole and the disassembly hole used to cooperate with the screw assembly are composed of half a smooth hole and half a threaded hole. The mounting holes and the disassembly holes are arranged alternately. An expansion joint is arranged on the cone sleeve.

[0007] The inner surface of the inner sleeve is an inner conical surface, and the outer surface of the tapered sleeve is an outer conical surface; half of the threaded holes constituting the installation hole are arranged at the large end of the inner conical surface of the inner sleeve, and half of the smooth holes constituting the installation hole are arranged at the large end of the outer conical surface of the tapered sleeve; half of the threaded holes constituting the disassembly hole are arranged at the large end of the outer conical surface of the tapered sleeve, and half of the smooth holes constituting the disassembly hole are arranged at the large end of the inner conical surface of the inner sleeve.

[0008] The inner surface of the tapered sleeve is a cylindrical surface, and the large end of the inner conical surface of the inner sleeve is arranged with M mounting holes 1 and M-1 disassembly holes 1, wherein the mounting hole 1 is a half threaded hole and the disassembly hole 1 is a half plain hole, and the large end of the outer conical surface of the tapered sleeve is arranged with M mounting holes 2 and M-1 disassembly holes 2, wherein the mounting hole 2 is a half plain hole and the disassembly hole 2 is a half threaded hole; the M mounting holes 2 of the tapered sleeve correspond one-to-one with the M mounting holes 1 of the inner sleeve to form M mounting holes; the M-1 disassembly holes 2 of the tapered sleeve correspond one-to-one with the M-1 disassembly holes 1 of the inner sleeve to form M-1 disassembly holes.

[0009] Half of the smooth hole of the installation / removal hole is a blind hole; half of the threaded hole of the installation / removal hole can be a through hole or a blind hole.

[0010] The inner surface of the cone sleeve is provided with a keyway.

[0011] The inner surface of the outer sleeve is a cylindrical surface, and N inner grooves equidistantly distributed along the circumference are arranged on the inner surface of the outer sleeve, and slots are arranged at both ends of the inner surface of the outer sleeve; the outer surface of the inner sleeve consists of an outer spherical surface and an outer cylindrical surface, and N outer grooves equidistantly distributed along the circumference are arranged on the outer spherical surface of the inner sleeve, and the outer grooves of the inner sleeve correspond to the inner grooves of the outer sleeve, and the steel balls are placed in the N inner grooves on the inner surface of the outer sleeve and the N outer grooves on the outer spherical surface of the inner sleeve.

[0012] The outer cylindrical end of the outer sleeve is provided with an outer sleeve sealing groove, the outer cylindrical end of the inner sleeve is provided with an inner sleeve sealing groove, the large mouth end of the sealing cover which is interference fit in the outer sleeve sealing groove is clamped by a large clamp, and the small mouth end of the sealing cover which is interference fit in the inner sleeve sealing groove is clamped by a small clamp.

[0013] The clamping rings are placed in the clamping grooves at both ends of the outer sleeve.

[0014] The utility model has a novel structural design, and the installation and disassembly of the ball cage coupling are convenient through the arrangement of the installation hole and the disassembly hole, thereby greatly improving the production efficiency and comprehensively improving the performance of the ball cage coupling. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the prior art structure;

[0016] Figure 2 It is the front view of the utility model;

[0017] Figure 3It is a left view of the utility model;

[0018] Figure 4 It is a schematic diagram of the inner sleeve sealing groove structure;

[0019] Figure 5 It is a schematic diagram of the structure of the outer jacket sealing groove;

[0020] Figure 6 It is a schematic diagram of the connecting shaft;

[0021] Figure 7 It is a schematic diagram of the structure of the inner sleeve 4;

[0022] Figure 8 It is a schematic diagram of the structure of the cone sleeve 5;

[0023] In the figure, 1, outer sleeve, 2, steel ball, 3, retaining frame, 4, inner sleeve, 5, tapered sleeve, 6, inner sleeve sealing groove, 7, small clamp, 8, sealing cover, 9, large clamp, 10, outer sleeve sealing groove, 11-1, clamp ring 1, 11-2, clamp ring 2, 12, disassembly hole one, 13, installation hole one, 14, screw, 15 expansion joint, 16, connecting shaft, 17, flat key, 18, installation hole two; 19, disassembly hole two. DETAILED DESCRIPTION

[0024] Figure 2 , Figure 3 In the figure, the inner surface of the outer sleeve 1 is a cylindrical surface (i.e., an inner cylindrical surface), and the inner surface of the outer sleeve 1 is provided with N inner grooves equidistantly distributed along the circumference, and slots are provided at both ends of the inner cylindrical surface of the outer sleeve 1; the outer spherical surface of the inner sleeve 4 is provided with N outer grooves equidistantly distributed along the circumference, corresponding to the inner grooves of the outer sleeve 1; the retaining frame 3 is arranged between the inner cylindrical surface of the outer sleeve 1 and the outer spherical surface of the inner sleeve 4, and the retaining frame 3 is provided with N windows, and N steel balls 2 are embedded in the windows and simultaneously placed in the N inner grooves on the inner cylindrical surface of the outer sleeve 1 and the N outer grooves on the outer spherical surface of the inner sleeve 4; the retaining rings 11-1 and 11-2 are placed in the slots at both ends of the outer sleeve 1 to control the axial slip of the steel balls 2. The inner surface of the inner sleeve 4 is a cone with a cone angle of 8°. The large end of the inner conical surface of the inner sleeve 4 is provided with M mounting holes (i.e., half a threaded hole mounting hole) 13 and M-1 disassembly hole (i.e., half a light hole disassembly hole) 12. The M mounting holes 13 on the inner sleeve 4 are half threaded holes, and the M-1 disassembly hole 12 are half light holes. The center diameters of the mounting hole 13 and the disassembly hole 12 are the same, and it can be ensured that there are approximately half of the half threaded holes or half light holes on the inner sleeve 4. The angular positions of the M mounting holes 13 along the circumference are arranged as evenly as possible without affecting other design items, and the angular positions of the M-1 disassembly holes 12 along the circumference are arranged as evenly as possible without affecting other design items. The mounting holes 13 and the disassembly holes 12 are interlaced and staggered, and the diameter of the disassembly hole 12 is 1 to 2 mm larger than the large diameter of the mounting hole 13.

[0025] Figure 8 In the embodiment, the outer surface of the cone sleeve 5 is a cone surface with a cone angle of 8°. The large end of the outer cone surface of the cone sleeve 5 is provided with M mounting holes 2 (i.e., half of the mounting hole 2) 18 and M-1 disassembly holes 2 (i.e., half of the threaded hole 2) 19. The mounting hole 2 18 on the cone sleeve 5 is a half of the hole, and the disassembly hole 2 19 is a half of the threaded hole. The center diameters of the mounting hole 2 18 and the disassembly hole 2 19 are the same, and it can be ensured that the cone sleeve 5 has roughly half of the half threaded hole or half of the hole. The cone sleeve 5 is provided with an expansion joint 15, and the width of the expansion joint 15 depends on the cone diameter, generally 3 to 8 mm. The inner surface of the cone sleeve 5 is a cylindrical surface, and a keyway or spline is provided inside.

[0026] Figure 7 , Figure 8 In the embodiment, the M mounting holes 18 of the cone sleeve 5 and the M mounting holes 13 of the inner sleeve 4 have the same center diameter and correspond to each other, forming M mounting holes; the M-1 disassembly holes 19 of the cone sleeve 5 and the M-1 disassembly holes 12 of the inner sleeve 4 have the same center diameter and correspond to each other, forming M-1 disassembly holes. Each half threaded hole and half smooth hole form a group.

[0027] The number M of installation and disassembly holes is selected according to the cone diameter, M≥3, and generally an odd number is taken, such as 3, 5, 7, 11... based on the cone diameter from small to large.

[0028] In this embodiment, there are four mounting holes 13 on the inner sleeve 4, and four mounting holes 18 on the tapered sleeve 5; there are three disassembly holes 12 on the inner sleeve 4, and three disassembly holes 19 on the tapered sleeve 5. Each half of the threaded hole and half of the smooth hole form a group, forming four groups of mounting holes and three groups of disassembly holes.

[0029] Figure 2 to Figure 6 In the figure, an outer sleeve sealing groove 10 is provided at the outer cylindrical end of the outer sleeve 1, an inner sleeve sealing groove 6 is provided at the outer cylindrical end of the inner sleeve 4, the large mouth end of the sealing cover 8 is interference fit into the outer sleeve sealing groove 10, and the large clamp 9 is clamped, and the small mouth end of the sealing cover 8 is interference fit into the inner sleeve sealing groove 6, and the small clamp 7 is clamped, which has the effect of sealing grease and preventing dust.

[0030] The installation steps are as follows:

[0031] ①Align the ball cage;

[0032] ② Install the connecting shaft 16 and the flat key 17 from the right end of the ball cage coupling to the left into the inner hole and keyway of the tapered sleeve 5; at the same time, install the tapered sleeve 5 from the left end of the ball cage coupling to the right into the inner conical surface of the inner sleeve 4, and the M mounting holes 2 18 of the tapered sleeve 5 correspond to the M mounting holes 13 of the inner sleeve 4, and the M-1 disassembly holes 2 19 of the tapered sleeve 5 correspond to the M-1 disassembly holes 12 of the inner sleeve 4;

[0033] ③M screws are screwed into the M mounting holes 13 of the inner sleeve 4 and the M mounting holes 2 18 of the cone sleeve 5 in sequence;

[0034] ④ Use a hexagonal screw wrench to tighten the M screws alternately to the torque value corresponding to their level;

[0035] ⑤Inspect and install.

[0036] (During the installation process, you can use a copper rod to knock on the inner sleeve or the large end of the cone sleeve to assist in aligning the assembly)

[0037] The disassembly steps are as follows:

[0038] ①Put the ball cage straight;

[0039] ② Use a hexagonal screw wrench to alternately remove M screws until they fall off;

[0040] ③ Use M-1 screws to screw into the M-1 disassembly holes 12 of the inner sleeve 4 and the M-1 disassembly holes 19 of the taper sleeve 5 in sequence;

[0041] ④ Use a hexagonal screw wrench to tighten M-1 screws alternately until the cone sleeve 5 loosens and falls out;

[0042] ⑤Take out the cone sleeve 5;

[0043] ⑥Inspection and disassembly are completed.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A ball cage type synchronous universal coupling, characterized in that: The invention comprises an outer sleeve (1), an inner sleeve (4), a retaining frame (3), and steel balls (2); the retaining frame (3) is arranged between the outer sleeve (1) and the inner sleeve (4); N windows are arranged on the retaining frame (3); the N steel balls (2) are embedded in the windows; the conical sleeve (5) is detachably connected to the inner sleeve (4) via a screw assembly; the mounting holes and the disassembly holes used to cooperate with the screw assembly are composed of half a plain hole and half a threaded hole; the mounting holes and the disassembly holes are arranged alternately; and the conical sleeve (5) is provided with an expansion joint (15).

2. The ball cage type synchronous universal coupling according to claim 1, characterized in that: The inner surface of the inner sleeve (4) is an inner conical surface, and the outer surface of the tapered sleeve (5) is an outer conical surface; half of the threaded holes constituting the mounting hole are arranged at the large end of the inner conical surface of the inner sleeve (4), and half of the light holes constituting the mounting hole are arranged at the large end of the outer conical surface of the tapered sleeve (5); half of the threaded holes constituting the disassembly hole are arranged at the large end of the outer conical surface of the tapered sleeve (5), and half of the light holes constituting the disassembly hole are arranged at the large end of the inner conical surface of the inner sleeve (4).

3. The ball cage type synchronous universal coupling according to claim 1 or 2, characterized in that: The inner surface of the cone sleeve (5) is a cylindrical surface. The inner cone surface of the inner sleeve (4) is provided with M mounting holes (13) and M-1 disassembly holes (12) at the large end thereof. The mounting hole (13) is a half threaded hole and the disassembly hole (12) is a half smooth hole. The outer cone surface of the cone sleeve (5) is provided with M mounting holes (18) and M-1 disassembly holes (19). The mounting hole (18) is a half smooth hole and the disassembly hole (19) is a half threaded hole. The M mounting holes 2 (18) of the cone sleeve (5) correspond one-to-one with the M mounting holes 1 (13) of the inner sleeve (4) to form M mounting holes; the M-1 disassembly holes 2 (19) of the cone sleeve (5) correspond one-to-one with the M-1 disassembly holes 1 (12) of the inner sleeve (4) to form M-1 disassembly holes.

4. The ball cage type synchronous universal coupling according to claim 3, characterized in that: Half of the smooth hole of the installation / removal hole is a blind hole; half of the threaded hole of the installation / removal hole can be a through hole or a blind hole.

5. The ball cage type synchronous universal coupling according to claim 1, characterized in that: The inner surface of the cone sleeve (5) is provided with a keyway.

6. The ball cage type synchronous universal coupling according to claim 1, characterized in that: The inner surface of the outer sleeve (1) is a cylindrical surface, and the inner surface of the outer sleeve (1) is provided with N inner grooves distributed at equal distances along the circumference, and slots are provided at both ends of the inner surface of the outer sleeve (1); the outer surface of the inner sleeve (4) is composed of an outer spherical surface and an outer cylindrical surface, and the outer spherical surface of the inner sleeve (4) is provided with N outer grooves distributed at equal distances along the circumference, and the outer grooves of the inner sleeve (4) correspond to the inner grooves of the outer sleeve (1), and the steel balls (2) are placed in the N inner grooves on the inner surface of the outer sleeve (1) and the N outer grooves on the outer spherical surface of the inner sleeve (4).

7. The ball cage type synchronous universal coupling according to claim 1, characterized in that: An outer sleeve sealing groove (10) is provided at the outer cylindrical end of the outer sleeve (1), an inner sleeve sealing groove (6) is provided at the outer cylindrical end of the inner sleeve (4), a large opening end of a sealing cover (8) interference fit in the outer sleeve sealing groove (10) is clamped by a large clamp (9), and a small opening end of a sealing cover (8) interference fit in the inner sleeve sealing groove (6) is clamped by a small clamp (7).

8. The ball cage type synchronous universal coupling according to claim 1, characterized in that: The clamping rings are placed in the clamping grooves at both ends of the outer sleeve (1).

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