Crank pin hole quenching positioning clamp
By designing a crank pin hole quenching positioning fixture, the problem of high cost and low efficiency caused by frequent replacement of multiple sets of fixtures was solved, and rapid quenching and efficient processing of cranks of various specifications were realized.
Patent Information
- Application Number
- CN202520021361.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-06
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2035-01-06
AI Technical Summary
In the existing technology, quenching the through holes of engine crankshafts and crankpins requires multiple sets of fixtures and frequent changes, resulting in high processing costs and low efficiency.
A crank pin hole quenching positioning fixture was designed, including a quenching base, a positioning plate, a positioning sleeve, and a lifting indexing arm. It enables rapid positioning and quenching of cranks of various specifications through multiple crank shaft positioning holes and positioning pins.
Rapid quenching of cranks of various specifications has been achieved, improving processing efficiency and reducing processing costs.
Smart Images
Figure CN223674700U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of fixture, concretely relates to a crank pin hole quenching positioning fixture. BACKGROUND
[0002] The engine crank assembly includes left and right cranks, the shape of the crank is similar to a mushroom, the disc part is usually called a handle part, and the rod part is usually called a crank rod. A through hole for pressing a connecting rod shaft is arranged on the handle part, and the through hole is usually called a crank pin hole. The crank pin hole and the crank rod are provided with an eccentric moment, and the connecting rod shaft is pressed to form a crank. In order to ensure the strength and mechanical properties of the crank pin hole, the inner surface of the crank pin hole usually needs to be quenched. The prior art engine crank pin hole quenching method adopts high-frequency or medium-frequency induction heating, that is, in the case that the crank rotates, an induction coil is inserted into the crank pin hole to inductively heat the inner surface of the crank pin hole. Since the crank pin hole and the crank rod are provided with an eccentric moment, the prior art engine crank pin hole quenching method needs multiple sets of fixtures and needs to frequently replace the fixtures, which leads to increased processing cost and low processing efficiency. SUMMARY
[0003] In view of the above problems in the prior art, the utility model provides a crank pin hole quenching positioning fixture which is simple in structure and convenient for quenching crank pin holes of various specifications.
[0004] In order to achieve the above purpose, the utility model adopts the following technical scheme:
[0005] A crank pin hole quenching positioning fixture, characterized by comprising a quenching base, a quenching machine positioning plate and a quenching positioning sleeve, wherein the quenching machine positioning plate is arranged on the top surface of the quenching base, the quenching machine positioning plate is provided with a mounting hole in the center, multiple crank shaft positioning holes are arranged on the outer side of the mounting hole, the quenching positioning sleeve is arranged in the mounting hole, the center distance between the multiple crank shaft positioning holes and the mounting hole corresponds to the eccentric distance of multiple specifications of cranks, the quenching positioning sleeve is provided with a vertical lifting quenching positioning pin on the top, the quenching positioning pin is matched with the quenching positioning sleeve in the lowered state, and a pressing plate for pressing the crank sector surface against the positioning plate is arranged on the top of one side of the quenching machine positioning plate.
[0006] Further, a lifting and indexing support arm is arranged on the quenching machine, and the quenching positioning sleeve is arranged at the bottom of the lifting and indexing support arm.
[0007] Further, one end of the pressing plate is arranged on the piston rod of a cylinder, and the free end of the pressing plate is provided with a pressing head.
[0008] The beneficial effects of the utility model include: the positioning mode is simple, the quick quenching of the crank pin hole can be realized, various specifications of crank connections can be matched, and the processing efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS
[0009] Fig. 1 It is the structure schematic diagram of the utility model;
[0010] Fig. 2 It is the plan view of the utility model. DETAILED DESCRIPTION
[0011] The utility model is further described in detail in combination with specific embodiments and drawings.
[0012] A crank pin hole quenching positioning fixture as Figs. 1-2 shown, including quenching base 1, quenching machine positioning plate 2, quenching positioning sleeve 3, wherein quenching machine positioning plate 2 is set up at the top surface of quenching base 1. Quenching machine positioning plate 2 has mounting hole 20 in the center, and multiple crank shaft positioning holes 21 are distributed outside mounting hole 20, and the center distance of multiple crank shaft positioning holes 21 and mounting hole 20 corresponds to the eccentric distance of multiple specifications of crank.
[0013] Quenching positioning sleeve 3 is arranged in mounting hole 20, and quenching positioning pin 4 is arranged vertically on quenching positioning sleeve 3, and lifting and indexing arm 8 is arranged on the quenching machine, and quenching positioning sleeve 3 is arranged at the bottom of lifting and indexing arm 8. Quenching positioning pin 4 is matched with quenching positioning sleeve 3 in the descending state, and pressing plate 6 is arranged on one side of quenching machine positioning plate 2 for pressing the crank sector surface on positioning plate 2.
[0014] One end of pressing plate 6 is arranged on the piston rod of cylinder 7, and the free end of pressing plate 6 is provided with pressure head 9.
[0015] The embodiment is installed on the quenching machine, the bearing mounting position on the shaft of the crank is positioned in crank shaft positioning hole 21, the crank pin hole of the crank is kept opposite to quenching positioning sleeve 3, then quenching positioning pin 4 is lowered to pass through the crank pin hole on crank 5, and then matched with quenching positioning sleeve 3 to realize positioning, then cylinder 7 drives pressing plate 6 to press the sector surface of the crank, then quenching positioning pin 4 is lifted, and the quenching induction coil of the quenching machine is inserted into the crank pin hole to quench.
[0016] The technical scheme provided by the utility model embodiment is described in detail above, and the principle and implementation mode of the utility model embodiment are described by applying specific examples in this paper; the above embodiment description is only applicable to helping understand the principle of the utility model embodiment; meanwhile, for the general technical personnel in the field, the specific implementation mode and application range of the utility model embodiment will be changed, and the above is described, and the content of the specification should not be understood as the limitation of the utility model.
Claims
1. A crankpin bore quenching positioning fixture, characterized by: It includes quenching base (1), quenching machine positioning plate (2), quenching positioning sleeve (3), wherein the quenching machine positioning plate (2) is arranged on the top surface of the quenching base (1), the quenching machine positioning plate (2) is provided with mounting hole (20) in the center, the mounting hole (20) is distributed with multiple crank shaft positioning hole (21) outside, multiple crank shaft positioning hole (21) and the center distance of mounting hole (20) correspond to multiple specifications of crank eccentricity, the quenching positioning sleeve (3) is arranged in the mounting hole (20), the quenching positioning sleeve (3) is provided with vertical lifting quenching positioning pin (4) on the top, the quenching positioning pin (4) is matched with the quenching positioning sleeve (3) in the descending state, the quenching machine positioning plate (2) is provided with pressing plate (6) on one side of the top for pressing the crank sector surface on the positioning plate (2).
2. A crankpin bore quenching fixture locating clamp according to claim 1 wherein: Quenching machine is provided with lifting and indexing support arm (8), the quenching positioning sleeve (3) is arranged at the bottom of the lifting and indexing support arm (8).
3. A crankpin bore quenching fixture locating clamp according to claim 1 wherein: One end of the pressing plate (6) is arranged on the piston rod of the cylinder (7), and the free end of the pressing plate (6) is provided with a pressure head (9).