Ball cage type synchronous universal coupling

Abstract

A ball cage type synchronous universal coupling comprises a first inner sleeve, a second inner sleeve, an outer sleeve and a balance assembly. The opposite faces of the first inner sleeve and the second inner sleeve are outer spherical faces, N evenly-distributed outer channels extending in the axial direction in a one-to-one correspondence mode are formed in the outer spherical faces of the first inner sleeve and the second inner sleeve, the outer sleeve is arranged on the outer spherical faces of the two inner sleeves in a sleeving mode, N evenly-distributed inner channels extending in the axial direction are formed in the inner cylindrical face of the outer sleeve, and the outer channels correspond to the inner channels in a one-to-one correspondence mode. The two steel ball groups are respectively arranged in a circular channel formed by the inner sleeve I, the inner sleeve II and the corresponding outer sleeve through a retainer; the balance assembly is installed in a center hole of the second inner sleeve and comprises a balance disc, and a device used for balancing weights is arranged on the balance disc. The mass distribution of the coupler relative to the rotation axis is changed, the gravity center coincides with the rotation center as much as possible, and therefore the dynamic balance precision of the coupler is improved, and vibration and noise are reduced.

Description

Technical Field

[0001] This utility model relates to the field of coupling technology, specifically a ball cage type synchronous universal coupling. Background Technology

[0002] Ball cage synchronous universal couplings (hereinafter referred to as ball cage couplings) are widely used in engineering, petroleum, metallurgy, textile, vehicle and other machinery industries for torque transmission between input and output shafts. The original ball cage coupling consisted of an inner sleeve at each end of the outer sleeve. N straight grooves with elliptical or circular cross-sections were evenly distributed along the circumference of both the inner and outer sleeves. Torque was transmitted through the inner sleeve grooves, steel balls, and outer sleeve grooves; power transmission between the driving and driven ends was achieved through the outer sleeve. However, due to different operating environments, the inner sleeves at both ends need to be customized according to customer requirements, resulting in different bore diameters and lengths, and therefore uneven mass. Under high-speed, heavy-load conditions, centrifugal force is often generated in the coupling due to changes in motor shaft speed and motor torque fluctuations, causing vibration and abnormal noise during acceleration or deceleration. In the transmission system connecting the motor and the working machine, the motor bearings are subjected to additional axial loads. Prolonged exposure to this condition can lead to excessive wear and damage to the motor bearings, shortening the motor's service life.

[0003] The traditional solution to the problem of centrifugal force generated in the coupling due to factors such as changes in motor shaft speed and fluctuations in motor torque, which cause vibration and abnormal noise during speed increase or decrease, is to perform a dynamic balancing test on the assembled coupling. This is achieved by adding weight to the outer wall of the outer and inner sleeves or by drilling holes to remove weight. However, this method affects the appearance of the product, and due to the requirements of actual working conditions, it is not always possible to achieve the purpose of balancing by adding weight and drilling holes. Utility Model Content

[0004] The purpose of this utility model is to provide a ball cage type synchronous universal coupling to solve the problem in the prior art where, under high-speed and heavy-load conditions, the coupling often generates centrifugal force due to factors such as changes in motor shaft speed and motor torque fluctuations. This causes vibration and abnormal noise in the coupling during acceleration or deceleration. In the transmission system connecting the motor and the working machine, the motor bearings are subjected to additional axial loads. If this condition is maintained for a long time, the motor bearings will be damaged due to excessive wear, shortening the service life of the motor.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a ball cage type synchronous universal coupling, comprising an inner sleeve I for engaging with the extension of the driving end shaft to achieve power input, an inner sleeve II for engaging with the extension of the driven end shaft to achieve power output, an outer sleeve, and a balancing assembly;

[0006] The inner sleeve 1 and inner sleeve 2 have opposing outer spherical surfaces. The outer spherical surfaces of the inner sleeve 1 and inner sleeve 2 are provided with N evenly distributed outer channels extending axially in a one-to-one correspondence. The outer sleeve is fitted on the outer spherical surfaces of the two inner sleeves. The inner cylindrical surface of the outer sleeve is provided with N evenly distributed inner channels extending axially. The outer channels correspond one-to-one with the inner channels. It also includes two steel ball groups. The two steel ball groups are respectively installed in the circular channels formed by the inner sleeve 1, inner sleeve 2 and the corresponding outer sleeve through a retainer.

[0007] The balancing assembly is installed in the center hole of the inner sleeve two. The balancing assembly includes a balancing disc, on which a device for counterweight is provided.

[0008] The inner sleeve has two convex rings arranged side by side in the two central holes, and the balancing assembly is installed between the two convex rings.

[0009] The balance disk of the balancing assembly has annular limiting plates extending outward from both ends. Limiting grooves are respectively opened on the opposite side of the two limiting plates. Several U-shaped connecting blocks are evenly distributed around the opposite surfaces of the two convex rings. One end of the connecting block is fixedly connected to the convex ring, and the other end is movably connected to the limiting groove.

[0010] When the inner sleeve one is lighter than the inner sleeve two, the counterweight device on the balance disc consists of several balance holes arranged in a ring array.

[0011] When the inner sleeve one is lighter than the inner sleeve two, the counterweight device on the balance disc is a number of balance blocks arranged in a circular array.

[0012] The side surface of the balance disc has an annular groove, and several balance blocks are distributed in a circular array within the annular groove.

[0013] The inner cylindrical surface of the outer sleeve is equipped with four steel wire retaining rings. The four steel wire retaining rings are arranged in pairs at both ends of the retainer to limit the steel balls in each group of steel balls.

[0014] The outer sleeve is equipped with sealing covers at both ends. One end of the sealing cover is connected to the outer end of the outer sleeve by fasteners, and the other end is fixed to the outer end face of the inner sleeve one and inner sleeve two by clamps.

[0015] This invention uses a balancing component to balance the centrifugal force during the rotation of the coupling. As the balancing disc rotates with the coupling, the balancing holes ensure that the inner sleeves on both sides of the balancing disc are of equal mass, thereby reducing the centrifugal force during the rotation of the coupling and ensuring smooth transmission under high-speed operating conditions.

[0016] Based on the mass of the inner sleeves at both ends, balance holes are provided on the balance disc or balance blocks are welded inside the annular groove to ensure that the mass of the inner sleeves on both sides of the balance disc is appropriate. The number of balance holes or balance blocks is determined according to the mass difference of the inner sleeves on both sides, so as to change the mass distribution of the coupling relative to the axis of rotation, so that the center of gravity coincides with the center of rotation as much as possible, thereby improving the dynamic balance accuracy of the coupling and reducing vibration and noise.

[0017] Meanwhile, lubricant can be added to the inside of the connecting block and the limiting slide groove to increase the service life of the balance disc. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the planar structure of this utility model;

[0019] Figure 2 This is a partial three-dimensional structural diagram of the present utility model;

[0020] Figure 3 This is a cross-sectional three-dimensional structural diagram of the present invention;

[0021] Figure 4 This utility model Figure 3 Enlarged structural diagram at point A in the middle.

[0022] In the diagram: 1. Inner sleeve one; 2. Clamp; 3. Sealing cover; 4. Cage; 5. Steel ball; 6. Oil plug; 7. Steel wire retaining ring; 8. Outer sleeve; 9. Fastener; 10. Inner sleeve two; 1001. Convex ring; 11. Balancing assembly; 1101. Balancing disc; 1102. Balancing hole; 1103. Bearing; 1104. Annular groove; 1105. Limiting plate; 1106. Limiting slide groove; 1107. Connecting block; 1108. Balancing block. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model. Example 1

[0024] Please see Figures 1-4This utility model provides a technical solution: a ball-cage type synchronous universal coupling, comprising an inner sleeve 1 for connecting with the extended shaft of the driving end to achieve power input, an inner sleeve 2 10 for connecting with the extended shaft of the driven end to achieve power output, an integral outer sleeve 8 that cooperates with the inner sleeve 1 and the inner sleeve 2 10, and a balancing assembly 11. The balancing assembly 11 is installed in the central hole of the inner sleeve of the inner sleeve 2 10. Two parallel convex rings 1001 are fixedly connected to the inner wall of the inner sleeve 2 10. The balancing assembly 11 includes a balancing disc 1101, which is movably connected inside the inner sleeve 2 10 and located between the two convex rings 1001. The side surface of the balancing disc 1101... The inner sleeve 1 is provided with an annular groove 1104. When the inner sleeve 1 is lighter than the inner sleeve 2 10, the balance disk 1101 is provided with several balance holes 1102 for counterweight. The balance holes 1102 are arranged in an annular array on the balance disk 1101. An annular limiting piece 1105 is fixedly connected to the outer ring of each of the two sides of the balance disk 1101. An annular limiting groove 1106 is provided on the opposite side of the two limiting pieces 1105. Several connecting blocks 1107 are movably connected inside the limiting groove 1106. The connecting blocks 1107 are arranged in an annular array inside the limiting groove 1106. The other side of the connecting block 1107 is fixedly connected to one side of the convex ring 1001.

[0025] In this embodiment, as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, one end of inner sleeve 1 and one end of inner sleeve 2 10 are provided with an outer spherical surface, which is located in the inner cylindrical surface of outer sleeve 8. Ten outer grooves for steel ball movement are provided on the outer spherical surfaces of inner sleeve 1 and inner sleeve 2 10. Ten corresponding inner grooves for steel ball movement are provided on the inner wall of outer sleeve 8. It also includes two groups of steel balls, with the steel balls 5 in each group placed in the grooves formed by inner sleeve 1, inner sleeve 2 10, and outer sleeve 8 via a retainer 4. The grooves have an elliptical, circular, or peach-shaped straight cross-section.

[0026] In this embodiment, as Figure 1 As shown, the outer wall of the outer jacket 8 is provided with an oil injection channel for injecting oil into the inner channel. The oil injection channel opening is located at the center of the outer jacket 8, and an oil plug 6 is provided on the oil injection port. Four steel wire retaining rings 7 are installed on the inner cylindrical surface of the outer jacket 8. The four steel wire retaining rings 7 are arranged in pairs and are located at both ends of the retainer 4 to limit the steel balls 5 in each steel ball group. Sealing covers 3 are installed on the outer sides of both ends of the outer jacket 8. One end of the two sealing covers 3 is connected to the outer side of the outer jacket 8 by fasteners 9, and the other end is fixed to the circumference of the inner sleeve 1 and inner sleeve 2 10 by clamps 2.

[0027] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the design of the balancing component 11 is used to balance the centrifugal force generated during the rotation of the coupling. The balancing component 11 ensures that the mass of the inner sleeves on both sides is adapted to each other, thereby reducing the centrifugal force and stabilizing the rotation of the coupling. At the same time, lubricating fluid can be added to the inside of the connecting block and the limiting slide groove to increase the service life of the balancing disc. Example 2

[0028] This utility model includes an inner sleeve 1 for power input through a connection with the active end shaft extension, an inner sleeve 2 10 for power output through a connection with the driven end shaft extension, an integral outer sleeve 8 that cooperates with the inner sleeve 1 and the inner sleeve 2 10, and a balancing assembly 11. The balancing assembly 11 is installed in the central hole of the inner sleeve of the inner sleeve 2 10. Two parallel convex rings 1001 are fixedly connected to the inner wall of the inner sleeve 2 10. The balancing assembly 11 includes a balancing disc 1101, which is movably connected inside the inner sleeve 2 10 and is located between the two convex rings 1001. An annular groove 1104 is provided on the side surface of the balancing disc 1101. When the inner sleeve 1 is heavier than the inner sleeve 2 10, a balancing block 1108 is installed inside the annular groove 1104 for counterweight. The balancing blocks 1108 are arranged in a ring array inside the annular groove 1104. An annular limiting piece 1105 is fixedly connected to the outer ring of each of the two sides of the balance disc 1101. An annular limiting groove 1106 is opened on the opposite side of the two limiting pieces 1105. Several connecting blocks 1107 are movably connected inside the limiting groove 1106. The connecting blocks 1107 are arranged in a ring array inside the limiting groove 1106. The other side of the connecting block 1107 is fixedly connected to one side of the convex ring 1001.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A ball-cage type synchronous universal coupling, characterized in that, It includes an inner sleeve (1) for connecting with the active end shaft extension to realize power input, an inner sleeve (2) (10) for connecting with the driven end shaft extension to realize power output, an outer sleeve (8) and a balance assembly (11); The inner sleeve 1 (1) and inner sleeve 2 (10) have opposite surfaces that are spherical. The outer surfaces of the inner sleeve 1 (1) and inner sleeve 2 (10) are provided with N evenly distributed outer channels that extend axially in a one-to-one correspondence. The outer sleeve (8) is fitted on the outer surfaces of the two inner sleeves. The inner cylindrical surface of the outer sleeve (8) is provided with N evenly distributed inner channels that extend axially. The outer channels correspond one-to-one with the inner channels. It also includes two steel ball groups. The two steel ball groups are respectively installed in the circular channels formed by the inner sleeve 1 (1), inner sleeve 2 (10) and the corresponding outer sleeve (8) through a retainer (4). The balancing component (11) is installed in the center hole of the inner sleeve (10). The balancing component (11) includes a balancing disc (1101) and a device for counterweight is provided on the balancing disc (1101).

2. The ball cage type synchronous universal coupling according to claim 1, characterized in that, The inner sleeve (10) has two convex rings (1001) arranged side by side in the center hole, and the balancing component (11) is installed between the two convex rings (1001).

3. A ball-cage type synchronous universal coupling according to claim 1 or 2, characterized in that, The balance disk (1101) of the balance component (11) has annular limiting plates (1105) extending outward from both ends. Limiting grooves (1106) are respectively opened on the opposite side of the two limiting plates (1105). Several U-shaped connecting blocks (1107) are evenly arranged around the opposite surface of the two convex rings (1001). One end of the connecting block (1107) is fixedly connected to the convex ring (1001), and the other end is movably connected to the limiting groove (1106).

4. A ball-cage type synchronous universal coupling according to claim 1 or 2, characterized in that, When the inner sleeve 1 (1) is lighter than the inner sleeve 2 (10), the counterweight device on the balance disc (1101) is a number of balance holes (1102) arranged in a ring array.

5. A ball-cage type synchronous universal coupling according to claim 1 or 2, characterized in that, When the inner sleeve 1 (1) is lighter than the inner sleeve 2 (10), the counterweight device on the balance plate (1101) is a number of balance blocks (1108) arranged in a ring array.

6. A ball-cage type synchronous universal coupling according to claim 5, characterized in that, The side surface of the balance disc (1101) is provided with an annular groove (1104), and a number of balance blocks (1108) are distributed in an annular array within the annular groove (1104).

7. A ball-cage type synchronous universal coupling according to claim 1, characterized in that, The inner cylindrical surface of the outer sleeve (8) is equipped with four steel wire retaining rings (7). The four steel wire retaining rings (7) are arranged in pairs and are located at both ends of the retainer (4) to limit the steel balls (5) in each group of steel balls.

8. A ball-cage type synchronous universal coupling according to claim 1, characterized in that, The outer sleeve (8) is equipped with sealing covers (3) at both ends. One end of the sealing cover (3) is connected to the outer end of the outer sleeve (8) by fasteners (9), and the other end is fixed to the outer end face of the inner sleeve one (1) and the inner sleeve two (10) by clamps (2).

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