Steel ball coupling

Abstract

The utility model provides a steel ball coupling, which is used for connecting a motor and a main machine concentric shaft in the machinery industry and realizing reliable transmission of motion and torque, and specifically comprises a first half coupling, a second half coupling is arranged on the side part of the first half coupling, the first half coupling and the second half coupling are clamped, a check ring is arranged on the other side of the second half coupling, and the check ring is connected with the second half coupling. The first half coupling and the second half coupling are connected through a fastener, and steel balls are arranged in a cavity formed between the first half coupling and the second half coupling. The steel ball is adopted as a power transmission body, the self-aligning compensation capacity is high, alternating torque and vibration hazards caused by installation centering errors can be eliminated, the fatigue fracture risk of the connecting shaft is effectively reduced, meanwhile, the oil injection lubrication function is achieved, the service life is prolonged, the structure is simple, the machining cost is low, and practicability is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical equipment and relates to a steel ball coupling. Background Art

[0002] Couplings, also known as couplings, are mechanical components used to reliably connect the driving shaft and the driven shaft in different mechanisms to rotate together and transmit motion and torque. They are usually composed of two halves, which are connected by keys or tight fits, fastened to the two shaft ends, and then connected in some way. As the core component between the transmission motor and the main machine or the driving shaft and the driven shaft, the coupling has high installation accuracy requirements for the two connecting shafts. Once the concentricity and deflection are not up to standard, the coupling body and the connecting parts will wear abnormally, causing equipment vibration and even spindle breakage accidents. In addition, in the environment of forward and reverse rotation and frequent starting, the coupling transmission body (such as the pin) is impacted and worn, and is forced to stop and replace, affecting the operating rate of the driven equipment. Utility Model Content

[0003] The utility model aims to provide a steel ball coupling to solve the problems of the prior art, in which the concentricity and deflection of the existing coupling body and the connecting parts do not meet the standards, resulting in abnormal wear, equipment vibration, and even spindle breakage.

[0004] To this end, the utility model adopts the following technical solutions:

[0005] A steel ball coupling comprises a first half coupling, a second half coupling is arranged on the side of the first half coupling, and the two are in a snap-fitting state, a retaining ring is arranged on the other side of the second half coupling, and the two are connected by fasteners, a steel ball is arranged in the cavity formed between the first half coupling and the second half coupling, and an axial assembly gap δ1 and a radial assembly gap δ2 are arranged between the first half coupling and the second half coupling.

[0006] Furthermore, the first half-coupling is a stepped rotating body, including a first boss and a second boss whose circular areas decrease successively from one end to the other end, and a first axial hole passing through the first boss and the second boss; the side wall of the first axial hole is provided with a first keyway; the end face of the first boss is provided with a special-shaped recess, and the edge of the special-shaped recess is composed of a number of semicircular arcs and arc lines arranged at continuous intervals; the side of the semicircular arc close to the first axial hole is provided with a first through hole.

[0007] Furthermore, the second half-coupling is a stepped rotating body, including a third boss and a fourth boss whose circular areas increase successively from one end to the other end, and a second axial hole passing through the third boss and the fourth boss; a second keyway is provided on the side wall of the second axial hole; a special-shaped boss is provided on the other side of the fourth boss, the diameter of the special-shaped boss is smaller than the diameter of the fourth boss, and a plurality of second through holes and screw holes arranged at continuous intervals are provided at the edge of the special-shaped boss.

[0008] Furthermore, the retaining ring is in a circular ring shape and is provided with a plurality of third through holes arranged in a ring shape.

[0009] Furthermore, the steel ball is spherical and has a diameter of a4.

[0010] Furthermore, the fasteners are bolts.

[0011] Furthermore, the relationship between the radial assembly gap δ2 and the outer diameter D12 of the special-shaped concave platform and the outer diameter D22 of the special-shaped convex platform is: δ2=(D12-D22) / 2;

[0012] The relationship between the radius r of the semicircular arc and the aperture a2 of the second through hole is: a2=2r.

[0013] The relationship between the diameter a3 of the third through hole and the major diameter m of the screw hole is: a3=m+1.

[0014] The relationship between the diameter a4 of the steel ball and the diameter a2 of the second through hole is: a4=(0.93-0.95)a2; the relationship between the inner diameter D31 of the retaining ring and the diameter D21 of the third boss is: D31=D21+1.

[0015] The beneficial effects of the utility model are:

[0016] 1. The utility model adopts steel balls as the power transmission body, which has strong self-aligning compensation ability, can eliminate the alternating torque and vibration hazards caused by installation centering errors, and effectively reduce the risk of fatigue fracture of the connecting shaft;

[0017] 2. The utility model has the function of oil injection and lubrication, which can extend the service life of the device;

[0018] 3. The utility model can be used in forward and reverse rotation and frequent starting environments. Compared with the traditional coupling, it can effectively reduce the impact wear problem of the transmission body and has the advantages of simple structure, low processing cost and strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a cross-sectional structural schematic diagram of the utility model;

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

[0021] Figure 3 for Figure 2 Schematic diagram of the AA section;

[0022] Figure 4 is a schematic cross-sectional structural diagram of the first half coupling;

[0023] Figure 5 Schematic diagram of the top view of the first half coupling;

[0024] Figure 6 is a schematic cross-sectional structural diagram of the second half coupling;

[0025] Figure 7 is a schematic diagram of the top view of the second half coupling;

[0026] Figure 8 for Figure 7 Schematic diagram of the middle BB section;

[0027] Fig. 9 Schematic diagram of the top view of the retaining ring;

[0028] Fig.10 It is a schematic diagram of the side structure of the retaining ring.

[0029] In the figure, 1-first half coupling, 1a-first boss, 1b-second boss, 1c-first axial hole, 1c1-first keyway, 1d-special-shaped recess, 1d1-semicircular arc, 1d2-arc, 1e-first through hole, 2-second half coupling, 2a-third boss, 2b-fourth boss, 2c-second axial hole, 2c1-second keyway, 2d-special-shaped boss, 2d1-second through hole, 2d2-screw hole, 3-steel ball, 4-retaining ring, 4a-third through hole, 5-fastener. DETAILED DESCRIPTION

[0030] The technical solution of the utility model is described below in conjunction with the accompanying drawings and implementation methods.

[0031] like Figures 1 to 3 As shown, the steel ball coupling comprises a first half coupling 1, a second half coupling 2 is arranged on the side of the first half coupling 1, and the two are in a snap-fitting state, a retaining ring 4 is arranged on the other side of the second half coupling 2, and the two are connected by a fastener 5, and a steel ball 3 is arranged in the cavity formed between the first half coupling 1 and the second half coupling 2. An axial assembly gap δ1 and a radial assembly gap δ2 are arranged between the first half coupling 1 and the second half coupling 2.

[0032] like Figure 4 and 5As shown, the first half coupling 1 is a stepped rotating body, including a first boss 1a and a second boss 1b whose circular areas decrease successively from one end to the other end, and a first axial hole 1c that passes through the first boss 1a and the second boss 1b; a first keyway 1c1 is provided on the side wall of the first axial hole 1c; a special-shaped recess 1d is provided on the end face of the first boss 1a, and the edge of the special-shaped recess 1d is composed of a plurality of semicircular arcs 1d1 and arc lines 1d2 that are arranged at continuous intervals; a first through hole 1e is provided on the side of the semicircular arc 1d1 close to the first axial hole 1c.

[0033] like Figures 6-8 As shown, the second half coupling 2 is a stepped rotating body, including a third boss 2a and a fourth boss 2b whose circular areas increase successively from one end to the other end, and a second axial hole 2c that passes through the third boss 2a and the fourth boss 2b; a second keyway 2c1 is provided on the side wall of the second axial hole 2c; a special-shaped boss 2d is provided on the other side of the fourth boss 2b, and the diameter of the special-shaped boss 2d is smaller than the diameter of the fourth boss 2b, and a plurality of second through holes 2d1 and screw holes 2d2 that are continuously spaced are provided on the edge of the special-shaped boss 2d.

[0034] Specifically, the steel ball 3 is spherical, and its diameter is a4; Fig. 9 and 10 As shown, the retaining ring 4 is in a circular ring shape and is provided with a plurality of third through holes 4a arranged in a ring shape; the fasteners 5 are bolts.

[0035] In addition, the following parameters are limited:

[0036] The relationship between the radial assembly clearance δ2 and the outer diameter D12 of the special-shaped concave platform 1d and the outer diameter D22 of the special-shaped convex platform 2d is: δ2=(D12-D22) / 2;

[0037] The relationship between the radius r of the semicircular arc 1d1 and the aperture a2 of the second through hole 1c1 is: a2=2r;

[0038] The relationship between the diameter of the third through hole 3a a3 and the major diameter m of the screw hole 1c2 is: a3=m+1;

[0039] The relationship between the diameter a4 of the steel ball 3 and the diameter a2 of the second through hole 1c1 is: a4=(0.93-0.95)a2; the relationship between the inner diameter D31 of the retaining ring 4 and the diameter D21 of the third boss 2a is: D31=D21+1.

[0040] The installation process of the utility model is as follows:

[0041] Step 1, installing the first half coupling 1 on the main shaft of the driven equipment;

[0042] Step 2, insert the retaining ring 4 into the third boss 2a of the second half coupling 2, and install the second half coupling 2 and the retaining ring 4 assembly into the motor shaft;

[0043] Step 3: Using the first half coupling 1 as a reference, align the second half coupling 2, that is, measure the concentricity deviation of the second half coupling 2 relative to the first half coupling 1 in four directions of the circumference, measure the numerical deviation of the axial assembly clearance δ1 in four directions, and tighten the anchor bolts of the motor after adjusting to the standard;

[0044] Step 4, insert the steel balls 3 into the second through holes 2d1 of the second half coupling 2 on the motor side in sequence;

[0045] Step 5, adjust the position of the retaining ring 4, make the third through hole 4a correspond to the screw hole 2d2 of the second half coupling 2, and then install the bolt;

[0046] Step 6: Inject lubricating grease into the first through hole of the first half coupling 1 on the main machine side. When the motor is running, the first half coupling 2 rotates with the motor shaft, and the steel ball 3 rotates synchronously around the motor axis due to the tangential force in the circumferential direction. Through the rotation of the steel ball 3, the first half coupling 1 rotates as a driven part, thereby driving the main shaft of the driven equipment to achieve rotational operation.

Claims

1. Steel ball coupling, characterized in that: The invention comprises a first half coupling (1), a second half coupling (2) is provided on the side of the first half coupling (1), and the two are in a snap-fitting state, a retaining ring (4) is provided on the other side of the second half coupling (2), and the two are connected via a fastener (5), a steel ball (3) is provided in a cavity formed between the first half coupling (1) and the second half coupling (2), and an axial assembly gap (δ1) and a radial assembly gap (δ2) are provided between the first half coupling (1) and the second half coupling (2).

2. The steel ball coupling according to claim 1, characterized in that: The first half coupling (1) is a stepped rotating body, comprising a first boss (1a) and a second boss (1b) whose circular areas decrease successively from one end to the other end, and a first axial hole (1c) penetrating the first boss (1a) and the second boss (1b); a first keyway (1c1) is provided on the side wall of the first axial hole (1c); an irregular concave platform (1d) is provided on the end face of the first boss (1a), and the edge of the irregular concave platform (1d) is composed of a plurality of semicircular arcs (1d1) and arc lines (1d2) arranged at intervals in a continuous manner; and a first through hole (1e) is provided on the side of the semicircular arc (1d1) close to the first axial hole (1c).

3. The steel ball coupling according to claim 2, characterized in that: The second half coupling (2) is a stepped rotating body, comprising a third boss (2a) and a fourth boss (2b) whose circular areas increase successively from one end to the other end, and a second axial hole (2c) penetrating the third boss (2a) and the fourth boss (2b); a second keyway (2c1) is provided on the side wall of the second axial hole (2c); a special-shaped boss (2d) is provided on the other side of the fourth boss (2b), and the diameter of the special-shaped boss (2d) is smaller than the diameter of the fourth boss (2b); and a plurality of second through holes (2d1) and screw holes (2d2) are provided at the edge of the special-shaped boss (2d) and are arranged in a continuous interval.

4. The steel ball coupling according to claim 3, characterized in that: The retaining ring (4) is in the shape of a circular ring and is provided with a plurality of third through holes (4a) arranged in a circular shape.

5. The steel ball coupling according to claim 1, characterized in that: The steel ball (3) is spherical and has a diameter of a4.

6. The steel ball coupling according to claim 1, characterized in that: The fastener (5) is a bolt.

7. The steel ball coupling according to claim 3, characterized in that: The relationship between the radial assembly clearance (δ2) and the outer diameter D12 of the special-shaped concave platform (1d) and the outer diameter D22 of the special-shaped convex platform (2d) is: δ2=(D12-D22) / 2.

8. The steel ball coupling according to claim 3, characterized in that: The relationship between the radius r of the semicircular arc (1d1) and the aperture a2 of the second through hole (2d1) is: a2=2r.

9. The steel ball coupling according to claim 4, characterized in that: The relationship between the hole diameter a3 of the third through hole (4a) and the major diameter m of the screw hole (2d2) is: a3=m+1.

10. The steel ball coupling according to claim 3, characterized in that: The relationship between the diameter a4 of the steel ball (3) and the diameter a2 of the second through hole (2d1) is: a4=(0.93-0.95)a2; the relationship between the inner diameter D31 of the retaining ring (4) and the diameter D21 of the third boss (2a) is: D31=D21+1.

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