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CN-224223800-U - Puller structure for disassembling conical ball bearing of cam shaft

CN224223800UCN 224223800 UCN224223800 UCN 224223800UCN-224223800-U

Abstract

The utility model provides a puller structure for disassembling a conical ball bearing of a camshaft, which can be used for pressing and disassembling after a bearing to be disassembled is placed in an alignment notch, so that the disassembling efficiency of the bearing is improved, and the manufacturing cost is low. The bearing positioning device comprises a placement seat, wherein the upper surface of the placement seat is provided with a concave profiling positioning groove, the profiling positioning groove comprises a shaft body suspension cavity, a bearing suspension cavity and a shaft body supporting notch groove, the shaft body supporting notch groove is arranged corresponding to one end side of the placement seat in the length direction, clamping jaws are arranged on two sides of the shaft body supporting notch groove, the opposite distance between the clamping jaws is smaller than the outer diameter of an inner ring of a cam shaft conical ball bearing and larger than the outer diameter of a corresponding shaft body, a supporting block is arranged at the bottom of the shaft body supporting notch groove, the upper surface of the supporting block is used for supporting the shaft body, the front end of the placement seat corresponding to the shaft body suspension cavity is provided with a penetrating threaded hole, and a tip cone comprises a stud section and a tip cone body, and the tip end of the tip cone body is used for propping against the end face position of the small-diameter end of the shaft body.

Inventors

  • ZHANG BIN

Assignees

  • 苏州电中燃油喷射科技有限公司

Dates

Publication Date
20260512
Application Date
20250612

Claims (7)

  1. 1. A puller structure for camshaft cone ball bearing disassembly, comprising: The upper surface of the placement seat is provided with an inwards concave profiling positioning groove, the profiling positioning groove comprises a shaft body suspension cavity, a bearing suspension cavity and a shaft body supporting notch groove, the shaft body supporting notch groove is arranged corresponding to one end side of the placement seat in the length direction, clamping jaws are arranged on two sides of the shaft body supporting notch groove, the opposite distance between the clamping jaws is smaller than the outer diameter of an inner ring of a cam shaft conical ball bearing and larger than the outer diameter of a corresponding shaft body, a supporting block is arranged at the bottom of the shaft body supporting notch groove, the upper surface of the supporting block is used for supporting the shaft body, and a through threaded hole is formed in the front end of the placement seat corresponding to the shaft body suspension cavity; the tip end of the tip cone body is used for propping against the end face position of the small-diameter end of the shaft body; The screw bolt section threaded connection run through the screw hole, tip cone body is located the unsettled chamber of axis body, the outer end of screw bolt section expose in place the seat, the conical ball bearing of camshaft is arranged in the bearing suspension chamber, and conical ball bearing's inner circle corresponds the terminal surface and hugs closely inner wall of jack catch, the inner wall of supporting piece respectively, the terminal surface position of the tip cone body's the minor diameter end of axis body of camshaft is withstood to the tip of tip cone body, and the operator is rotatory through driving the screw bolt section and then makes conical ball bearing move in the minor diameter end region of opposite direction camshaft to accomplish conical ball bearing's dismantlement operation.
  2. 2. The puller structure for disassembling a tapered ball bearing of a camshaft as set forth in claim 1 wherein the placement base comprises a bottom plate, two side plates, a front end plate, a rear end plate, and an upper cover plate.
  3. 3. The puller structure for disassembling the tapered ball bearing of the camshaft according to claim 2, wherein the inner surface of the front end plate is fixedly connected with a threaded hole mounting seat, a through threaded hole which penetrates axially is formed in the threaded hole mounting seat, a through hole is formed in a corresponding position of the front end plate, a reinforcing plate is welded on the outer surface of the front end plate, and a guide hole is formed in a position, corresponding to the through hole, of the reinforcing plate.
  4. 4. A puller structure for disassembling a conical ball bearing of a camshaft according to claim 3, wherein the upper cover plate is a cover mounting area corresponding to the threaded hole mounting seat, corresponding notches are respectively arranged at positions of the upper cover plate corresponding to the shaft body suspension cavity, the bearing suspension cavity and the shaft body supporting notch groove, and the upper cover plate is welded and connected with the corresponding upper surfaces of the two side plates, the front end plate and the rear end plate.
  5. 5. The puller structure for disassembling a tapered ball bearing of a camshaft as set forth in claim 4, wherein the rear end plate is notched at a position corresponding to the shaft body supporting notch groove, the bottom area of the rear end plate is a supporting block, and the positions of both sides of the rear end plate are corresponding claws.
  6. 6. The puller structure for disassembling a tapered ball bearing of a camshaft as set forth in claim 1 wherein the stud segment of the tip cone further comprises a driving end.
  7. 7. The puller structure for disassembling a tapered ball bearing of a camshaft as set forth in claim 6 wherein said driving end is exposed to said placement base and is of a hexagonal configuration.

Description

Puller structure for disassembling conical ball bearing of cam shaft Technical Field The utility model relates to the technical field of camshaft bearing disassembly, in particular to a puller structure for disassembling a conical ball bearing of a camshaft. Background In a common four-stroke diesel engine, the rotation speed of a camshaft of an oil injection pump is 1/2 of the rotation speed of a crankshaft, and in order to ensure that higher oil injection pressure and accurate oil injection advance angle (the error is controlled within 1 DEG of the rotation angle of the crankshaft) can be generated, the transmission between the diesel engine and the oil injection pump is required to have enough strength and rigidity. In order to realize good lubrication of moving parts (such as a cam shaft, a tappet and the like) of the fuel injection pump, a lubricating oil way is communicated with a lubricating oil way of the diesel engine, when the cam shaft rotates, a plunger reciprocates up and down in a plunger sleeve through interaction of a roller tappet and a plunger spring to generate a pressure oil effect, so that fuel is injected into a cylinder of the diesel engine through a high-pressure oil pipe and an oil injector through an oil outlet valve. The camshaft is used as an important part in the NB pump, the conical ball bearing is required to be disassembled for assembly in the assembly process due to gap adjustment or instantaneous pressure adjustment, three claws are generally adopted in the prior art to carry out disassembly operation by pulling the maleic, each claw needs to be adjusted to enable the claw to clamp the corresponding end of the bearing respectively, namely, the disassembly operation can be carried out only by accurately aligning the position relation of the three claws, so that the disassembly efficiency of the bearing is low, and therefore, the development of a puller structure capable of improving the disassembly efficiency is urgently needed. Disclosure of utility model According to the puller structure for disassembling the cam shaft conical ball bearing, the bearing to be disassembled is placed in the alignment notch, so that press attachment and disassembly can be performed, the disassembly efficiency of the bearing is improved, and the manufacturing cost is low. A puller structure for camshaft cone ball bearing disassembly, comprising: The upper surface of the placement seat is provided with an inwards concave profiling positioning groove, the profiling positioning groove comprises a shaft body suspension cavity, a bearing suspension cavity and a shaft body supporting notch groove, the shaft body supporting notch groove is arranged corresponding to one end side of the placement seat in the length direction, clamping jaws are arranged on two sides of the shaft body supporting notch groove, the opposite distance between the clamping jaws is smaller than the outer diameter of an inner ring of a cam shaft conical ball bearing and larger than the outer diameter of a corresponding shaft body, a supporting block is arranged at the bottom of the shaft body supporting notch groove, the upper surface of the supporting block is used for supporting the shaft body, and a through threaded hole is formed in the front end of the placement seat corresponding to the shaft body suspension cavity; the tip end of the tip cone body is used for propping against the end face position of the small-diameter end of the shaft body; The screw bolt section threaded connection run through the screw hole, tip cone body is located the unsettled chamber of axis body, the outer end of screw bolt section expose in place the seat, the conical ball bearing of camshaft is arranged in the bearing suspension chamber, and conical ball bearing's inner circle corresponds the terminal surface and hugs closely inner wall of jack catch, the inner wall of supporting piece respectively, the terminal surface position of the tip cone body's the minor diameter end of axis body of camshaft is withstood to the tip of tip cone body, and the operator is rotatory through driving the screw bolt section and then makes conical ball bearing move in the minor diameter end region of opposite direction camshaft to accomplish conical ball bearing's dismantlement operation. It is further characterized by: the placing seat comprises a bottom plate, two side plates, a front end plate, a rear end plate and an upper cover plate; The inner surface of the front end plate is fixedly connected with a threaded hole mounting seat, a through threaded hole which penetrates axially is formed in the threaded hole mounting seat, a through hole is formed in the corresponding position of the front end plate, a reinforcing plate is welded on the outer surface of the front end plate, and a guide hole is formed in the position, corresponding to the through hole, of the reinforcing plate, so that the through threaded hole cannot deform or shift; The upper cover plate is