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CN-224223743-U - Press mounting jig

CN224223743UCN 224223743 UCN224223743 UCN 224223743UCN-224223743-U

Abstract

The present utility model relates to a press-fitting jig for press-fitting a weight to a crankshaft, and more particularly, to a press-fitting jig that prevents the weight from being deviated in a circumferential direction from an intended circumferential mounting position of the crankshaft. The press-fit jig comprises a jig main body, a first positioning part and a second positioning part. The jig main body is cylindrical or partially cylindrical and is suitable for being sleeved on the crankshaft in a sliding way relative to the crankshaft along the axial direction. The jig main body further comprises a bearing end face and a pressing end face which are opposite in the axial direction. The pressure-bearing end face is suitable for bearing the pressure-mounting force from the pressure-mounting equipment, and the pressure-bearing end face is suitable for applying the pressure-mounting force to the balance weight. The first positioning part is arranged on the jig main body and is suitable for being directly or indirectly matched with the crankshaft so as to position the press-fit jig relative to the crankshaft in the circumferential direction. The second positioning part is arranged on the jig main body and is suitable for being matched with the balance weight directly or indirectly so as to position the press-fit jig relative to the balance weight in the circumferential direction.

Inventors

  • LI WEI
  • SU JUNMEI
  • YE HANG

Assignees

  • 丹佛斯（天津）有限公司

Dates

Publication Date
20260512
Application Date
20250523

Claims (10)

  1. 1. The utility model provides a pressure equipment tool, its characterized in that, pressure equipment tool is used for pressing the balancing piece to the bent axle on to include: The jig body is cylindrical or partially cylindrical, is suitable for being sleeved on the crankshaft in a sliding way along the axial direction relative to the crankshaft, and comprises a bearing end face and a pressing end face which are opposite in the axial direction, wherein the bearing end face is suitable for bearing the pressing force from the pressing equipment, and the pressing end face is suitable for applying the pressing force to the balance block; A first positioning part arranged on the jig main body and suitable for being directly or indirectly matched with the crankshaft so as to position the press-fit jig relative to the crankshaft in the circumferential direction, and The second positioning part is arranged on the jig main body and is suitable for being directly or indirectly matched with the balance weight so as to position the press-fit jig relative to the balance weight in the circumferential direction.
  2. 2. The press-fitting jig according to claim 1, wherein the first positioning portion is a through groove that extends from an outer peripheral surface of the jig main body to an inner peripheral surface thereof to penetrate the jig main body, and a length direction of the through groove is substantially parallel to the axial direction.
  3. 3. The press-fitting jig according to claim 2, wherein the through groove extends to the pressing end face in the axial direction to form an opening on the pressing end face.
  4. 4. The press-fitting jig according to claim 1, wherein the second positioning portion is a lug portion protruding outward from an outer peripheral surface of the jig main body.
  5. 5. The press-fitting jig according to claim 4, wherein the lug portions are two lug portions spaced apart in the circumferential direction, one side of each lug portion in the circumferential direction is provided with a positioning surface adapted to abut against a positioned surface of the weight to position the press-fitting jig relative to the weight in the circumferential direction, and two of the positioning surfaces of the two lug portions are adjacent in the circumferential direction.
  6. 6. The press-fitting jig according to claim 5, wherein the two positioning surfaces are coplanar, the first positioning portion is a through groove that extends from an outer peripheral side of the jig main body to an inner peripheral surface thereof to penetrate the jig main body, and a length direction of the through groove is substantially parallel to the axial direction, and a reference straight line passing through the through groove and an axis of the jig main body is substantially perpendicular to a reference plane in which the two positioning surfaces are located.
  7. 7. The press-fitting jig according to claim 5, wherein each lug portion has a non-positioning surface opposite to the positioning surface in the circumferential direction, and the first positioning portion is located between and spaced apart from two of the non-positioning surfaces of the two lug portions in the circumferential direction.
  8. 8. The press-fit jig of claim 7, further comprising a first arcuate transition and a second arcuate transition, the first arcuate transition being located at a junction of the locating surface and the jig body, the second arcuate transition being located at a junction of the non-locating surface and the jig body, the radius of the first arcuate transition being less than the radius of the second arcuate transition.
  9. 9. The press-fitting jig according to claim 1, wherein a protective sheath or a protective layer is provided on an inner peripheral side of the jig main body, and the protective sheath or the protective layer has a hardness lower than that of the jig main body.
  10. 10. The press-fit jig according to claim 9, wherein the protective sheath or the protective layer is at least partially made of aluminum or an alloy thereof, copper or an alloy thereof, nylon or teflon.

Description

Press mounting jig Technical Field The utility model relates to the field of press-fitting jigs, in particular to a press-fitting jig for press-fitting a balance weight to a crankshaft. Background An apparatus such as a scroll compressor includes a crankshaft and a counterweight mounted thereon. Due to the eccentric portion, the crankshaft may generate unbalanced centrifugal force during rotation. Such unbalanced centrifugal forces may cause undesirable vibrations to occur as the crankshaft rotates. The balance weight can change the mass distribution of the crankshaft, and helps to eliminate the generation of unbalanced centrifugal force, thereby inhibiting vibration during rotation. The balance weight needs to be positioned accurately relative to the crankshaft in the circumferential direction, so that deviation between the actual position and the expected circumferential position is avoided, otherwise, unbalanced centrifugal force generated during rotation of the crankshaft is difficult to avoid. Disclosure of utility model In view of the above, the present utility model proposes a press-fitting jig for press-fitting a weight to a crankshaft, and more particularly, to a press-fitting jig that prevents the weight from being deviated in a circumferential direction from an intended circumferential installation position with respect to the crankshaft. The press-fit jig comprises a jig main body, a first positioning part and a second positioning part. The jig main body is cylindrical or partially cylindrical and is suitable for being sleeved on the crankshaft in a sliding way relative to the crankshaft along the axial direction. The jig main body further comprises a bearing end face and a pressing end face which are opposite in the axial direction. The pressure-bearing end face is suitable for bearing the pressure-mounting force from the pressure-mounting equipment, and the pressure-bearing end face is suitable for applying the pressure-mounting force to the balance weight. The first positioning part is arranged on the jig main body and is suitable for being directly or indirectly matched with the crankshaft so as to position the press-fit jig relative to the crankshaft in the circumferential direction. The second positioning part is arranged on the jig main body and is suitable for being matched with the balance weight directly or indirectly so as to position the press-fit jig relative to the balance weight in the circumferential direction. In the embodiment of the utility model, the jig main body is cylindrical or partially cylindrical. The jig main body with the shape is suitable for the outer surface of the crankshaft, so that the press-fit jig can be sleeved on the crankshaft, at least can slide on the crankshaft along the axial direction in the press-fit process, and is limited relative to the crankshaft in the radial direction. Pressure-bearing end face and pressure-applying end face are oppositely arranged in the axial direction. In the press-fitting process, at least an axial press-fitting force from the press-fitting device is applied to the press-bearing end face of one end of the press-fitting jig in the axial direction, and a press-bearing end face of the other end of the press-fitting jig in the axial direction is applied to the balance weight, thereby press-fitting the balance weight to the crankshaft. The pressure-bearing end face and the pressure-applying end face arranged on the axial direction reduce the press-fitting stroke of the press-fitting device. In the press fitting process, the first positioning part is matched with the crankshaft, the second positioning part is matched with the balance weight, and the crankshaft and the balance weight are positioned in the circumferential direction by combining the first positioning part with the balance weight, so that the crankshaft and the balance weight are prevented from moving in the circumferential direction in the press fitting process, and the accurate positioning of the crankshaft and the balance weight in the circumferential direction after the press fitting is ensured. In one example, the first positioning portion is a through groove that extends from an outer peripheral surface of the jig body to an inner peripheral surface thereof to penetrate the jig body, and a length direction of the through groove is substantially parallel to the axial direction. In the embodiment of the utility model, the first positioning part is a through groove which penetrates from the outer peripheral surface to the inner peripheral surface of the jig main body. The through slot is positioned relative to a locating pin adapted to mate with the crankshaft oil bore. The locating pin sequentially passes through the through groove and the crankshaft oil hole in the radial direction. The through groove thus constructed facilitates pre-mounting the press-fitting jig between the crankshaft and the weight. The longitudinal direction of the through groove is substant