Ball cage type synchronous universal coupling and sealing device thereof

Abstract

The ball cage type synchronous universal coupling comprises two coupling bodies which are symmetrically arranged, each coupling body comprises an outer sleeve, an inner sleeve and a retainer, limiting pieces are arranged at the two ends of each coupling body, each limiting piece comprises a steel wire baffle ring and a baffle, and the inner end of the inner cylindrical surface of each outer sleeve is provided with a circle of annular step. The baffles are fixed at the annular steps of the two jackets through fasteners; outer flanges are arranged at the inner ends of the outer cylindrical surfaces of the two jackets; the joint surfaces of the outer flanges at the inner ends of the two coupling bodies are hermetically connected through a sealing plate and a fastening assembly; the two sealing structures are used for connecting the outer ends of the coupling bodies in a sealing manner; the sealing structure comprises a sealing sleeve, a large gland and a small gland. The design of the upper flange and the lower flange of the sealing sleeve is utilized, the embedded structure of the sealing sleeve, the large gland, the small gland, the inner sleeve and the outer sleeve is adopted, the ball cage coupling is effectively sealed, the large gland and the small gland are ingeniously combined with the sealing sleeve, and the reliability of high-speed operation of the ball cage coupling is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to a coupling, in particular to a ball cage type synchronous universal coupling and sealing device thereof. 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] There are various kinds of couplings for direct connection with motor, such as diaphragm coupling, drum gear coupling, ball cage coupling, etc.

[0004] Diaphragm coupling does not need lubrication and sealing, and is maintenance-free, but it requires high installation precision, and has no axial displacement compensation, so it is easy to be damaged when installed out of tolerance.

[0005] Drum gear coupling has compact structure, small rotation radius and angular deviation compensation of 1.5°, and is suitable for low-speed heavy-load working conditions. Since the adjustment angular deviation of diaphragm coupling and drum gear coupling is not greater than 1.5°, the axial displacement capacity is limited, especially the installation of both is hinge hole bolt, and the installation of hinge hole bolt requires high precision. In general, the two shafts of the connected parts are required to be completely concentric, but during operation, due to manufacturing and installation errors, bearing wear, stress deformation, foundation subsidence and other conditions, it is inevitable to cause the deviation of the shaft line, which exceeds the use requirement.

[0006] The angular deviation compensation of ball cage coupling can reach 5°, has certain axial displacement, is easy to align and install, and transmits large torque, but has certain requirements for sealing device. The existing ball cage coupling has contact type structure for sealing device, which is easy to cause lubricating grease to seep out or even be thrown out at high speed, and in severe cases, the transmission parts are surrounded by splashed grease, which pollutes the environment by mixing with dust and water vapor. More seriously, it causes the lack of lubricating grease in the ball cage coupling, insufficient lubrication or dry grinding, which causes heating and sintering, and finally fails to work normally, see Figure 1 . Figure 1In the prior art, the inner sleeve and the cage seal 1 are in lip interference contact, and when the ball cage coupling works and is deflected by a certain angle, the inner sleeve and the cage seal 1 often have irregular gaps, causing leakage of lubricating grease; the O-ring 2 between the gland and the outer sleeve is sealed, and if the depth of the groove of the O-ring 2 or the size precision and the shape tolerance of the gland are not controlled well during assembly of the ball cage coupling, the O-ring 2 will be cut by the gland or not be contacted, etc., affecting the sealing effect; the spacer 3 between the two outer sleeves is sealed, and a good sealing effect cannot be formed between the steel parts. The above three cases directly lead to leakage of lubricating grease of the ball cage coupling, affecting the feasibility of high-speed use of the ball cage coupling. For the existing sealing device fixed at both ends, under high speed, due to the effect of centrifugal force, the sealing sleeve expands, is scraped and torn by the surrounding mechanical device, or is torn along the clamp, which also causes leakage of grease, thereby causing the ball cage coupling to lack lubricating grease and heat and sintering failure. SUMMARY

[0007] The utility model discloses a ball cage type synchronous universal coupling and sealing device thereof with large compensation angle, axial displacement and good high-speed sealing performance.

[0008] The utility model discloses a ball cage type synchronous universal coupling, including two symmetrical arrangement's coupling body, each coupling body includes outer sleeve, inner sleeve, retainer, and the limit piece for the movement limit of inner sleeve and retainer is arranged at the both ends of coupling body, the limit piece includes the steel wire baffle at outer end, the baffle at inner end, is equipped with a ring annular step in the inner cylindrical surface inner end of two symmetrical arrangement's outer sleeve, and the baffle is fixed the annular step place of two outer sleeves by fastener, and the outer cylindrical surface inner end of two symmetrical arrangement's outer sleeve has outer flange;The outer flange joint surface at the inner end of two couplings is sealed and connected through sealing plate and fastening assembly;Still include two for sealing structure of the outer end of each coupling body;The sealing structure includes sealing sleeve;The sealing sleeve includes outer sealing structure, inner sealing structure, arc sealing section that links to each other between outer sealing structure and inner sealing structure;The outer sealing structure includes the radial sealing section of arc sealing section connection's radial extension, and the annular sealing section no. 1 of radial sealing section connection's axial extension, and the inner circle inner end of annular sealing section no. 1 has upper flange;The inner sealing structure includes the annular sealing section no. 2 of arc sealing section connection, and the outer circle outer end of annular sealing section no. 2 has lower flange;Form arc groove between annular sealing section no. 2 and arc sealing section;The sealing structure still includes the big gland for the outer sealing structure of sealing sleeve and press tightly to the outer sleeve, and the small gland for the inner sealing structure of sealing sleeve and press tightly to the inner sleeve.

[0009] The big gland cover comprises an annular cover plate corresponding to the annular sealing section of the sealing sleeve, a radial cover plate corresponding to the radial sealing section of the sealing sleeve, and a tangent plate tangent to the arc surface of the arc-shaped sealing section of the sealing sleeve, and the annular cover plate, the radial cover plate and the tangent plate are sequentially connected; the annular cover plate is uniformly provided with N riveting holes one; the small gland cover comprises an annular plate, the outer end of the annular plate is provided with a radial limiting surface, the inner end of the annular plate is rounded to form a round head, the middle part of the annular plate is uniformly provided with N riveting holes two, the inner ring of the annular plate is a stepped shape formed by a large step part and a small step part, and an inner ring groove is arranged between the small step part and the large step part; the outer cylindrical surface of the outer sleeve close to the outer end is provided with a ring groove two and a sealing step two, and the two side walls of the ring groove two are symmetrically inclined; the outer cylindrical surface of the inner sleeve close to the outer end is provided with a ring groove one and a sealing step one, and the two side walls of the ring groove one are symmetrically inclined; during assembly, the lower flange of the sealing sleeve is embedded into the inner ring groove of the small gland cover; the round head of the small gland cover is embedded into the arc-shaped groove of the sealing sleeve, and is sleeved together at the sealing step one and the ring groove one of the inner sleeve, the small gland cover riveted at the ring groove one of the inner sleeve is pressed against the inner sealing structure of the sealing sleeve, and the limiting surface of the small gland cover abuts against the outer end of the inner sleeve; the upper flange of the sealing sleeve is nested in the sealing step two of the outer sleeve, and the big gland cover riveted at the ring groove two of the outer sleeve is pressed against the outer sealing structure of the sealing sleeve, and the tangent plate of the big gland cover is tangent to the sealing sleeve and limits the radial direction of the sealing sleeve.

[0010] The riveting hole two of the small gland cover corresponds to the ring groove one of the inner sleeve, and the riveting is performed through the riveting hole two by using a sharp chisel to embed the folded edge into the inner sleeve ring groove one to form riveting fixation; the riveting hole one of the big gland cover corresponds to the ring groove two of the outer sleeve, and the riveting is performed through the riveting hole one of the big gland cover by using a sharp chisel to embed the folded edge into the outer sleeve ring groove two to form riveting fixation.

[0011] A partition plate is arranged between the radial sealing section of the sealing sleeve and the outer sleeve.

[0012] The baffle is an annular plate, the annular plate is provided with a counterbore matched with the fastener for assembly, the outer sleeve is provided with an axial mounting hole corresponding to the counterbore, and the counterbore and the axial mounting hole form a complete mounting hole, and the fastener is mounted in the mounting hole.

[0013] The depth of the annular step is greater than the depth of the baffle, and the depth of the annular step and the depth of the baffle are indicated by the horizontal arrow; the inner hole of the baffle is larger than the cylindrical surface of the inner sleeve to avoid interference during axial compression. The baffle ensures the limit of the inward movement (compression) of the inner sleeve and the retainer, and the inner hole and the step of the baffle are arranged to avoid interference with the movement of the inner sleeve and the retainer. Figure 2

[0014] The fastening assembly comprises a bolt, a nut and a spring washer.

[0015] ​The outer spherical surface of the inner sleeve is provided with N outer channels equally distributed along the circumference, the outer channels are parallel to the axis, the number of the inner channels of the outer sleeve is equal to and corresponds to the number of the outer channels, the inner hole of the inner sleeve is provided as a spline or a spline, the retainer is arranged between the outer cylindrical surface of the outer sleeve and the outer spherical surface of the inner sleeve, N steel balls are inserted into the window holes of the retainer in an interference fit, and are simultaneously arranged in the N inner channels on the inner surface of the outer sleeve and the N outer channels on the outer spherical surface of the inner sleeve.

[0016] When the thickness of the small grommet is > 1.5mm, the riveting hole two is a counterbore structure, the thickness of the small hole part of the riveting hole two is ≤1.5mm; when the thickness of the large grommet is > 1.5mm, the riveting hole one is a counterbore structure, the thickness of the small hole part of the riveting hole one is ≤1.5mm; when the thickness of the small grommet is ≤1.5mm, the riveting hole two is a through hole structure, the thickness of the riveting hole two is = the thickness of the small grommet; when the thickness of the large grommet is ≤1.5mm, the riveting hole one is a through hole structure, the thickness of the riveting hole one is = the thickness of the large grommet.

[0017] A kind of sealing device of ball cage type synchronous universal coupling, including sealing sleeve;The sealing sleeve includes outer sealing structure, inner sealing structure, arc sealing section connected between outer sealing structure and inner sealing structure;The outer sealing structure includes the radially extending radial sealing section connected with arc sealing section, annular sealing section one axially extending connected with radial sealing section, and the inner end of the inner ring of annular sealing section one has upper flange;The inner sealing structure includes annular sealing section two connected with arc sealing section, and the outer end of the outer ring of annular sealing section two has lower flange;Arc-shaped groove is formed between annular sealing section two and arc sealing section;The sealing structure further includes large gland for pressing outer sealing structure of sealing sleeve to outer sleeve, small gland for pressing inner sealing structure of sealing sleeve to inner sleeve;The large gland includes annular cover plate corresponding to annular sealing section one of sealing sleeve, radial cover plate corresponding to radial sealing section of sealing sleeve, tangent plate tangent to the arc surface of arc sealing section of sealing sleeve, and annular cover plate, radial cover plate, tangent plate are sequentially connected;Annular cover plate is uniformly distributed with N riveting holes one;The small gland includes annular plate, and the outer end of annular plate has radially extending limiting surface, and the inner end of annular plate is rounded to form a round head, and annular plate has uniformly distributed N riveting holes two in the middle part, and the inner ring of annular plate is stepped shape formed by large step part and small step part, and there is inner ring groove between small step part and large step part;The outer cylindrical surface of outer sleeve close to outer end is provided with annular groove two and sealing step two, and the two side walls of annular groove two are symmetrically inclined;The outer cylindrical surface of inner sleeve close to outer end is provided with annular groove one and sealing step one, and the two side walls of annular groove one are symmetrically inclined;When assembling, lower flange of sealing sleeve is embedded in inner ring groove of small gland;Round head of small gland is embedded in arc-shaped groove of sealing sleeve, and is assembled together at sealing step one and annular groove one of inner sleeve, and small gland riveted at annular groove one of inner sleeve is pressed to inner sealing structure of sealing sleeve, and limiting surface on small gland abuts against outer end of inner sleeve;Upper flange of sealing sleeve is nested in sealing step two of outer sleeve, and large gland riveted at annular groove two of outer sleeve is pressed to outer sealing structure of sealing sleeve, and tangent plate on large gland is tangent to sealing sleeve, and limits sealing sleeve radially.

[0018] The utility model discloses the design of upper and lower flange of sealing sleeve, adopts the embedded structure of sealing sleeve and large and small gland and inner and outer sleeve, effectively seals ball cage coupling, and the ingenious combination of large and small gland and sealing sleeve guarantees the reliability of high-speed operation of ball cage coupling.The structure meets the use requirement of high-speed ball cage coupling of large torque, expands the use field of ball cage coupling, and expands the market share of ball cage coupling. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is prior art structure schematic diagram;

[0020] Figure 2 It is structure schematic diagram of the utility model;

[0021] Figure 3Structure diagram of inner sleeve;

[0022] Figure 4 Structure diagram of inner sleeve; Figure 3 Structure diagram of inner sleeve;

[0023] Figure 5 Structure diagram of inner sleeve; Structure diagram of inner sleeve;

[0024] Figure 6 Structure diagram of inner sleeve; Figure 5 Structure diagram of inner sleeve;

[0025] Figure 7 Structure diagram of inner sleeve;

[0026] Figure 8 Structure diagram of inner sleeve; Figure 7 Structure diagram of inner sleeve;

[0027] Figure 9 Structure diagram of inner sleeve;

[0028] Figure 10 Structure diagram of inner sleeve; Figure 9 Structure diagram of inner sleeve;

[0029] Figure 11 Structure diagram of inner sleeve;

[0030] Figure 12 Structure diagram of inner sleeve;

[0031] Figure 13 Structure diagram of inner sleeve;

[0032] Figure 1 In the figure, 1, skeleton seal, 2, O-ring, 3, spacer sleeve;

[0033] Figures 2-13 In the figure, 4, inner sleeve, 4-1, ring groove one, 4-2, sealing step one, 5, outer sleeve, 5-1, ring groove two, 5-2, sealing step two, 6, retainer, 7, baffle, 8, bolt, 9, nut, 10, spring washer, 11, sealing plate, 12, steel ball, 13, steel wire baffle, 14, large gland, 14-1, riveting hole one, 14-2, cutting plate, 15, sealing sleeve, 15-1, lower flange, 15-2, arc-shaped groove, 15-3, upper flange, 15-4, arc-shaped sealing segment, 16, partition plate, 17, small gland, 17-1, riveting hole two, 17-2, limiting surface, 17-3, inner ring groove, 17-4, round head, 18, fastener. DETAILED DESCRIPTION

[0034] Figure 2The utility model discloses a bearing, which comprises an inner sleeve 4, an outer sleeve 5, a retainer 6, a baffle 7, a bolt 8, a nut 9, a spring washer, a sealing plate 11, a steel ball 12, a steel wire baffle ring 13, a large gland 14, a sealing sleeve 15, a partition plate 16, a small gland 17 and a fastener 18.

[0035] The outer sleeve 4 is provided with N outer channels on the outer spherical surface, which are distributed equidistantly along the circumference and are parallel to the axis, and the number of the outer channels is equal to and corresponds to the number of the inner channels of the outer sleeve 5; the inner hole of the inner sleeve 4 is provided with a flat key or a spline, or other required connecting mode.

[0036] The outer sleeve 5 and the inner sleeve 4 are each provided with two symmetrically arranged retainers 6; one baffle 7 is arranged in the inner cylindrical surface of the middle part of the symmetrically arranged outer sleeve 5, and the baffles 7 are fixed on the left and right outer sleeves by the fasteners 18, respectively, and are used for limiting the inward movement (compression) of the inner sleeve 4 and the retainer 6; the outer end of the inner cylindrical surface of the outer sleeve 5 is provided with a steel wire baffle ring 13, which is used for limiting the outward movement (stretching) of the inner sleeve 4 and the retainer 6; the large end of the sealing sleeve 15 is arranged on the outer cylindrical surface of the outer sleeve 5 through the partition plate 16 and is fixed by the large gland 14; the small end of the sealing sleeve is fixed by the small gland 17; the sealing plate 11 is arranged between the two symmetrically arranged outer flanges of the outer sleeve 5, is used for sealing the joint surface, and is fastened by the bolt 8, the nut 9 and the spring washer 10.

[0037] Figure 3 、 4 The outer cylindrical surface of one end of the inner sleeve 4 is provided with a ring groove 4-1 and a sealing step 4-2; the two side walls of the ring groove 1 are symmetrically inclined at an angle to form a dovetail groove, and the inclination angle is ≤5°.

[0038] Figure 5 、 6 The outer cylindrical surface of one end of the outer sleeve 5 is provided with a ring groove 5-1 and a sealing step 5-2; the two side walls of the ring groove 5-1 are symmetrically inclined at an angle to form a dovetail groove, and the inclination angle is ≤5°.

[0039] Figure 7 、 8 The small gland 17 is provided with N uniformly distributed riveting holes 17-1, a limiting surface 17-2, an inner ring groove 17-3 and a round head 17-4; the riveting holes 17-1 are in a counterbore structure, and the thickness of the small hole part of the riveting holes 17-1 is ≤1.5 mm.

[0040] Figure 9 、 10In the middle, the large gland 14 is provided with N evenly distributed riveting holes 14-1, a cutting plate 14-2, the riveting hole 14-1 is a counterbore structure, and the thickness of the small hole part of the riveting hole 14-1 is less than or equal to 1.5 mm.

[0041] Figure 11 、 12 In the middle, the sealing sleeve 15 is provided with a lower flange 15-1, an arc-shaped groove 15-2, an upper flange 15-3, and an arc-shaped sealing section 15-4.

[0042] Figure 13 In the middle, during assembly, the lower flange 15-1 of the sealing sleeve 15 is embedded into the inner ring groove 17-3 of the small gland 17; the round head 17-4 of the small gland 17 is embedded into the arc-shaped groove 15-2 of the sealing sleeve 15, and is assembled together at the sealing step one 4-2 and the ring groove one 4-1 of the inner sleeve 4, is pressed tightly, the limiting surface 17-2 on the small gland 17 limits, the riveting hole two 17-1 of the small gland 17 corresponds to the ring groove one 4-1 of the inner sleeve 4, a sharp chisel is used to rivet the flange embedded into the ring groove one 4-1 of the inner sleeve 4 through the riveting hole two 17-1, the two symmetrical inclined side walls of the ring groove one 4-1 and the riveted flange form a locking amount, the small gland is locked and fixed; the upper flange 15-3 of the sealing sleeve 15 is nested in the sealing step two 5-2 of the outer sleeve 5, the large gland 14 is pressed tightly, the riveting hole one 14-1 on the large gland 14 corresponds to the ring groove two 5-1 of the outer sleeve 5, a sharp chisel is used to rivet the flange embedded into the ring groove two 5-1 of the outer sleeve 5 through the riveting hole one 14-1 of the large gland 14, the two symmetrical inclined side walls of the ring groove two 5-1 and the riveted flange form a locking amount, the large gland is locked and fixed, and the cutting plate 14-2 on the large gland 14 is tangent to the sealing sleeve 15, and limits the radial direction of the sealing sleeve 15.

[0043] The above structure ensures the long-term effective dust-proof sealing grease effect of the sealing sleeve 15 of the ball cage coupling during high-speed rotation.

[0044] The above only describes the preferred embodiments of the utility model, and does not limit the utility model, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A ball cage type constant velocity universal joint characterized by: The coupling body comprises two symmetrically arranged coupling bodies, each coupling body comprises an outer sleeve (5), an inner sleeve (4) and a retainer (6), and the two ends of the coupling body are provided with limiting members for limiting the movement of the inner sleeve (4) and the retainer (6), the limiting members comprise a steel wire retaining ring (13) at the outer end and a baffle (7) at the inner end, a ring-shaped step is arranged at the inner cylindrical surface of the two symmetrically arranged outer sleeves (5), the baffle (7) is fixed at the ring-shaped step of the two outer sleeves by a fastener (18), and the inner end of the outer cylindrical surface of the two symmetrically arranged outer sleeves (5) is provided with an outer flange; the outer flanges of the two coupling bodies are sealingly connected at the joint surface by a sealing plate (11) and a fastening assembly; the sealing structure further comprises two sealing structures for sealingly connecting the outer ends of the coupling bodies; the sealing structure comprises a sealing sleeve (15); The sealing sleeve (15) comprises an outer sealing structure, an inner sealing structure and an arc-shaped sealing segment (15-4) connected between the outer sealing structure and the inner sealing structure; the outer sealing structure comprises a radially extending radial sealing segment connected with the arc-shaped sealing segment (15-4), and an annular sealing segment one extending in the axial direction and connected with the radial sealing segment; the inner end of the inner ring of the annular sealing segment one is provided with an upper flange (15-3); the inner sealing structure comprises an annular sealing segment two connected with the arc-shaped sealing segment (15-4), and the outer end of the outer ring of the annular sealing segment two is provided with a lower flange (15-1); an arc-shaped groove (15-2) is formed between the annular sealing segment two and the arc-shaped sealing segment (15-4); The sealing structure further comprises a large gland (14) for pressing the outer sealing structure of the sealing sleeve (15) against the outer sleeve (5) and a small gland (17) for pressing the inner sealing structure of the sealing sleeve (15) against the inner sleeve (4).

2. The ball cage type universal joint coupling according to claim 1, characterized by: The large gland (14) comprises an annular cover plate corresponding to the annular sealing segment one of the sealing sleeve (15), a radial cover plate corresponding to the radial sealing segment of the sealing sleeve (15) and a tangent plate (14-2) tangent to the arc surface of the arc-shaped sealing segment (15-4) of the sealing sleeve (15), and the annular cover plate, the radial cover plate and the tangent plate (14-2) are sequentially connected; the annular cover plate is uniformly provided with N riveting holes one (14-1); The small gland (17) comprises an annular plate, the outer end of the annular plate is provided with a limiting surface (17-2) extending in the radial direction, the inner end of the annular plate is rounded to form a round head (17-4), the middle part of the annular plate is uniformly provided with N riveting holes two (17-1), and the inner ring of the annular plate is in the shape of a step formed by a large step portion and a small step portion, and there is an inner ring groove (17-3) between the small step portion and the large step portion; The outer cylindrical surface of the outer sleeve (5) near the outer end is provided with a ring groove two (5-1) and a sealing step two (5-2), and the two side walls of the ring groove two (5-1) are symmetrically inclined; The outer cylindrical surface of the inner sleeve (4) near the outer end is provided with a ring groove one (4-1) and a sealing step one (4-2), and the two side walls of the ring groove one (4-1) are symmetrically inclined; When assembled, the lower flange (15-1) of the sealing sleeve (15) is embedded in the inner ring groove (17-3) of the small gland (17); the round head (17-4) of the small gland (17) is embedded in the arc-shaped groove (15-2) of the sealing sleeve (15) and is assembled together at the sealing step one (4-2) and the ring groove one (4-1) of the inner sleeve (4), the small gland (17) riveted at the ring groove one (4-1) of the inner sleeve (4) is pressed against the inner sealing structure of the sealing sleeve (15), the limiting surface (17-2) on the small gland (17) abuts against the outer end of the inner sleeve (4); the upper flange (15-3) of the sealing sleeve (15) is nested in the sealing step two (5-2) of the outer sleeve (5), the large gland (14) riveted at the ring groove two (5-1) of the outer sleeve (5) is pressed against the outer sealing structure of the sealing sleeve (15), the cut plate (14-2) on the large gland (14) is tangent to the sealing sleeve (15) and limits the radial direction of the sealing sleeve (15).

3. The ball cage type universal joint coupling according to claim 2, characterized in that: The riveting hole two (17-1) of the small gland (17) corresponds to the ring groove one (4-1) of the inner sleeve (4), the riveting flange is embedded in the ring groove one (4-1) of the inner sleeve (4) by using a sharp chisel through the riveting hole two (17-1) to form riveting fixation; the riveting hole one (14-1) on the large gland (14) corresponds to the ring groove two (5-1) of the outer sleeve (5), the riveting flange is embedded in the ring groove two (5-1) of the outer sleeve (5) by using a sharp chisel through the riveting hole one (14-1) of the large gland (14) to form riveting fixation.

4. The ball cage type universal joint coupling according to claim 1, characterized by: A partition plate (16) is arranged between the radial sealing section of the sealing sleeve (15) and the outer sleeve (5).

5. The ball cage type universal joint coupling of claim 1, wherein: The baffle (7) is an annular plate, the annular plate is provided with a counterbore matched with the fastener (18) near the outer ring, the outer sleeve (5) is provided with an axial mounting hole corresponding to the counterbore, the counterbore and the axial mounting hole form a complete mounting hole, and the fastener (18) is mounted in the mounting hole.

6. The ball cage type universal joint coupling of claim 1, wherein: The depth of the annular step is greater than the depth of the baffle (7); the inner hole of the baffle (7) is greater than the cylindrical surface of the inner sleeve (4).

7. The ball cage type universal joint coupling of claim 1, wherein: The fastening assembly includes a bolt (8), a nut (9) and a spring washer (10).

8. The ball cage type universal joint coupling of claim 1, wherein: The outer sleeve (5) is provided with N outer grooves equidistantly distributed along the circumference, the outer grooves are parallel to the axis, the number of the inner grooves of the outer sleeve (5) is equal to and corresponds to the number of the outer grooves, the inner hole of the inner sleeve (4) is provided as a spline or a spline, the retainer (6) is arranged between the outer cylindrical surface of the outer sleeve (5) and the outer spherical surface of the inner sleeve (4), N steel balls (12) are embedded in the window holes of the retainer (6) and are simultaneously arranged in the N inner grooves on the inner surface of the outer sleeve (5) and the N outer grooves on the outer spherical surface of the inner sleeve (4).

9. The ball cage type universal joint coupling set forth in claim 1 wherein: When the thickness of the small gland (17) is >1.5mm, the second riveting hole (17-1) is a counterbore structure, and the thickness of the small hole part of the second riveting hole (17-1) is ≤1.5mm; when the thickness of the large gland (14) is >1.5mm, the first riveting hole (14-1) is a counterbore structure, and the thickness of the small hole part of the first riveting hole (14-1) is ≤1.5mm; when the thickness of the small gland (17) is ≤1.5mm, the second riveting hole (17-1) is a through hole structure, and the thickness of the second riveting hole (17-1) is equal to the thickness of the small gland (17); when the thickness of the large gland (14) is ≤1.5mm, the first riveting hole (14-1) is a through hole structure, and the thickness of the first riveting hole (14-1) is equal to the thickness of the large gland (14).

10. A sealing device for a ball cage type constant velocity universal joint, characterized by: The sealing sleeve (15) comprises an outer sealing structure, an inner sealing structure, and an arc-shaped sealing section (15-4) connected between the outer sealing structure and the inner sealing structure; the outer sealing structure comprises a radial sealing section extending radially and connected with the arc-shaped sealing section (15-4), and an annular sealing section one extending axially and connected with the radial sealing section, and the inner end of the inner ring of the annular sealing section one has an upper flange (15-3); the inner sealing structure comprises an annular sealing section two connected with the arc-shaped sealing section (15-4), and the outer end of the outer ring of the annular sealing section two has a lower flange (15-1); an arc-shaped groove (15-2) is formed between the annular sealing section two and the arc-shaped sealing section (15-4); The sealing structure further comprises a large gland (14) for pressing the outer sealing structure of the sealing sleeve (15) against the outer sleeve (5), and a small gland (17) for pressing the inner sealing structure of the sealing sleeve (15) against the inner sleeve (4); The large gland (14) comprises an annular cover plate corresponding to the annular sealing section one of the sealing sleeve (15), a radial cover plate corresponding to the radial sealing section of the sealing sleeve (15), and a tangent plate (14-2) tangent to the arc surface of the arc-shaped sealing section (15-4) of the sealing sleeve (15), and the annular cover plate, the radial cover plate, and the tangent plate (14-2) are connected in sequence; the annular cover plate is uniformly provided with N first riveting holes (14-1); The small gland (17) comprises an annular plate, the outer end of the annular plate has a limiting surface (17-2) extending radially, the inner end of the annular plate is rounded to form a round head (17-4), the middle part of the annular plate is uniformly provided with N second riveting holes (17-1), and the inner ring of the annular plate is in a stepped shape formed by a large step part and a small step part, and there is an inner ring groove (17-3) between the small step part and the large step part; The outer cylindrical surface of the outer sleeve (5) near the outer end is provided with a ring groove two (5-1) and a sealing step two (5-2), and the two side walls of the ring groove two (5-1) are symmetrically inclined; The outer cylindrical surface of the inner sleeve (4) near the outer end is provided with a ring groove one (4-1) and a sealing step one (4-2), and the two side walls of the ring groove one (4-1) are symmetrically inclined; ​ In assembly, the lower flange (15-1) of the sealing sleeve (15) is embedded in the inner ring groove (17-3) of the small gland (17); the round head (17-4) of the small gland (17) is embedded in the arc-shaped groove (15-2) of the sealing sleeve (15), and is sleeved together at the sealing step one (4-2) and the ring groove one (4-1) of the inner sleeve (4), the small gland (17) riveted at the ring groove one (4-1) of the inner sleeve (4) is pressed against the inner sealing structure of the sealing sleeve (15), the limiting surface (17-2) on the small gland (17) abuts against the outer end of the inner sleeve (4); the upper flange (15-3) of the sealing sleeve (15) is nested in the sealing step two (5-2) of the outer sleeve (5), the large gland (14) riveted at the ring groove two (5-1) of the outer sleeve (5) is pressed against the outer sealing structure of the sealing sleeve (15), the cut plate (14-2) on the large gland (14) is tangent to the sealing sleeve (15) and limits the radial direction of the sealing sleeve (15).

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