Method of dismounting pinion-like member

FIELD: mechanical engineering.

SUBSTANCE: method comprises gripping the part to be dismounted and applying axial load by means of at least two ties and, e.g., hydraulic cylinder. The rod of the hydraulic cylinder cooperates with the face of the shaft. The ties are interconnected via a plate opposite to the end of the part to be dismounted. Each of the ties is provided with the eccentric groove. The ties are set in the openings in the part to be dismounted for permitting engagement by their step defined by the eccentric groove. Between the wall of the opening of the part to be dismounted and each tie is sickle-shaped bushing member. The hydraulic cylinder abuts against the plate so that to provide relationships D1 ≤ D2, b ≥ H, e = h, where D1 is the outer diameter of the tie, D2 is the diameter of the opening in the part to be dismounted, b is the width of the eccentric groove, H is the thickness of the part, e is the eccentricity of the groove with respect to the axis of the tie, and h is the maximum thickness of the sickle-shaped bushing member.

EFFECT: expanded functional capabilities.

1 cl, 2 dwg

 

The invention relates to the field of engineering, in particular to facilitate disassembly pressed products, and can be used in repair work in the event that a dismantling of the "friction welded parts from hard to reach places.

Known disassembling parts like gear from the shaft, including the capture of details and the application of axial force (see A.S. USSR №544531, CL 23 P 19/02, publ. in bull. No. 4 of 1977).

Also known disassembling parts like gear from the shaft, including the capture of details and the application of axial force by means of rods connected with the opposite relatively movable parts of the end plate, and, for example, a hydraulic cylinder, a rod which interacts with the end of the shaft (see A.S. USSR №210763, CL 23 P 19/027, publ. 04.06.1968).

However, the known methods of dismantling not allowed to withdraw the item type gear from the shaft, if it is not possible to catch (located in a remote place), and it is firmly seated on the shaft (friction welding), which is available on the technological holes for pickup (dismantling) do not provide the strength of the efforts of a stripper.

The basis of the claimed invention is a technical problem: to create a way of dismantling parts like gear, which would allow disassembly pressed, "friction welded parts from hard to reach places.

the technical result of the claimed invention is the expansion of technological capabilities by providing higher thrust removal.

This technical result is achieved by the fact that in disassembling parts like gear from the shaft, including the capture of details and the application of axial force by means of rods connected with the opposite relatively movable parts of the end plate, and, for example, a hydraulic cylinder, a rod which interacts with the end of the shaft, use at least two thrust, each of which is made eccentric groove and equipped mortgage element in the form of a Crescent cross-section of poluchulki, rods set into the holes of the disassembled parts with the possibility of snagging a ledge formed eccentric groove, with available end surface of movable parts, between the wall of the bore of the disassembled parts and each thrust of post Crescent in the cross section of poluotok, and the cylinder rests in the plate, with stand ratio:

D1≤D2, b≥H, e=h,

where D1- outer diameter of thrust;

D2the diameter of the hole of the disassembled parts;

b - the width of the eccentric groove;

H - thickness of the disassembled parts;

e - the eccentricity of the grooves relative to the axis of thrust;

h is the maximum thickness of the Crescent poluchulki.

In addition, when removing the gear with holes designed, for example, for ease, traction and sacla the data elements can be installed in these holes.

Figure 1 shows the circuit-constructive variant of implementation of the proposed method; figure 2 - section a-a in figure 1.

The method is as follows.

The gear 1 is firmly seated on the shaft 2. Technological openings for dismantling on the hub gears 1 does not provide the necessary means for its removal efforts. Disassembly of gear 1 shaft 2 carry out the inventive method, which includes seizure of movable gear 1 and the application of axial force. Axial force is applied by means of rods 3 connected with the opposite relatively movable gears 1 end plate 4 and the cylinder 5, the piston rod 6 which communicates with the end of the shaft 2. The method involves the use of at least two rods 3. Each rod 3 perform eccentric groove 7 and equip mortgage element 8 in the form of a Crescent cross-section of poluchulki. Thrust 3 sets of 9 holes removable gears 1 with gears ledge formed eccentric groove 7, with available mechanical surface 10 removable gears 1. Between the wall of the bore 9 of movable gears 1 and each thrust 3 post Crescent in the cross section of poluotok 8. The hydraulic cylinder 5 rests in the plate 4. Thus withstand ratio: D1≤D2, b≥H, e=h, where D1- outer diameter of thrust; D the diameter of the hole removable gear; b - width of the eccentric grooves; H - thickness of the movable gear; e is the eccentricity of the grooves relative to the thrust axis; h is the maximum thickness of the Crescent poluchulki.

Moreover, when removing the gear 1 with 9 holes, designed to facilitate, thrust 3 and embedded elements 8 mounted in the said opening 9.

Example. The method was tested on the automated line for longitudinal slitting of steel coils firms "Soenen, Belgium, where in the Winding device gear, causing the shaft of this device in action through beskonechnoe connection and located in a recess of the frame, did not succumb to dismantle to replace the shaft bearings. Disassemble the gear with the shaft turned out to be structurally impossible. Thrust threaded m wrapped in the holes on the hub of gear, when reaching efforts pickup 60 t collapsed. The reason was weakening beskonechnogo connection, the rotation of the gear relative to the shaft and, as a result, friction welding gear and shaft. To achieve axial force greater than the force of friction welding were used traction ⊘64 mm, which were instituted in the hole ⊘65 mm drive gear. The distance in a recess of the disc to the wall of the bed of 20 mm was sufficient to anchor rods for is not available tor the new surface of the drive gear through the holes ⊘ 65 mm disk. The distance from the toothed crown gear to the bed in the alcove was 3 mm In the four holes of the drive gear set four thrust with four broad polutonami. All thrust from the opposite end were linked by a common plate, which was supported cylinder, a rod which, interacting with the end of the shaft, when hydraulic pressure pushing down on the shaft, and when reaching the axial force of approximately 150 t has been a shift gear to the shaft. When disassembly is clearly visible welded section width of 10 mm and a length of 175 mm, which tore off the landing surface of the gear and which is left on the shaft.

Thus, the inventive method of dismantling allows you to parse pressed product if it is impossible disassembly friction welded parts from hard to reach places that expands its technological capabilities by providing higher thrust removal.

1. Disassembling parts like gear from the shaft, including the capture of details and the application of axial force by means of rods connected with the opposite relatively movable parts of the end plate, and, for example, a hydraulic cylinder, a rod which interacts with the end of the shaft, characterized in that use, at least two traction, each of which is made eccentric groove and equipped mortgage is lementa in the form of a Crescent cross-section of poluchulki, thrust is set in the holes of the disassembled parts with the possibility of snagging a ledge formed eccentric groove, with available end surface of movable parts between the wall of the bore of the disassembled parts and each thrust of post Crescent in the cross section of poluotok, and the cylinder rests in the plate, with stand ratio

D1≤D2, b≥H, e=h,

where D1- outer diameter of thrust;

D2the diameter of the hole of the disassembled parts;

b - the width of the eccentric groove;

H - thickness of the disassembled parts;

e - the eccentricity of the grooves relative to the axis of thrust;

h is the maximum thickness of the Crescent poluchulki.

2. The method according to claim 1, characterized in that when removing the gear with holes designed, for example, for ease, traction and embedded elements set in the above-mentioned holes.



 

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