# US 12,179,596 B2 · Engine connection structure for hybrid transmission

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- Number: US 12,179,596 B2
- Document ID: US12179596B2
- Status: Granted
- Kind: B2
- Application number: 17/403,851
- Filed: 2021-08-16
- Published: 2022-02-24
- Granted: 2024-12-31
- Earliest claimed: 2020-08-21
- Assignees: Hyundai Transys Inc.
- Applicants: Hyundai Transys Inc.
- Inventors: Tae Hoon Kim
- Web page: https://patentgrep.com/patent/US12179596B2

## CPC

- B60K 6/24: characterised by the combustion engines
- F16D 1/116: the interengaging parts including a continuous or interrupted circumferential groove in the surface of one of the coupling parts (circlips for retaining hubs on shafts F16B21/18)
- B60K 6/40: characterised by the assembly or relative disposition of components
- F16D 2001/103: {the torque is transmitted via splined connections}
- B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES

## Abstract

An engine connection structure for a hybrid transmission includes: a connecting mechanism having an edge connected with a mass by a connecting plate and connected to a counter-rotor shaft; and a drive plate being opposite to the connecting mechanism, positioned at a crankshaft, and connecting the mass and the crankshaft to each other.

## Claims

### Claim 1

An engine connection structure for a hybrid transmission, the engine connection structure comprising:
a connecting mechanism having an edge connected with a mass by a connecting plate, the connecting mechanism being connected to a rotor shaft; and
a drive plate disposed opposite to the connecting mechanism, positioned at a crankshaft, and connecting the mass and the crankshaft to each other,
wherein the connecting mechanism and the rotor shaft form a leveled plane along a surface of the connecting mechanism and a locking step of the rotor shaft, and
wherein, when a locking nut is thread-fastened to an outer surface of the rotor shaft, a surface of the locking nut is configured to be in contact with both of the surface of the connecting mechanism and the locking step of the rotor shaft along the leveled plane, thereby locking the connecting mechanism.

### Claim 2 (depends on 1)

The engine connection structure of claim 1,
wherein the connecting mechanism is a first connecting nut,
wherein the first connecting nut is coupled to the outer surface of the rotor shaft protruding toward the crankshaft by a spline,
wherein a first step and a second step are defined at a portion of the rotor shaft which is exposed to the crankshaft without being coupled to the first connecting nut,
wherein the locking nut is thread-fastened to an outer surface of the first step, the first step having an outer diameter smaller than an outer diameter of the rotor shaft coupled to the first connecting nut through the spline, and
wherein the second step has an outer diameter smaller than the outer diameter of the first step, the second step being is connected with the first step, the second step extending toward the crankshaft from the first step and being fitted in the crankshaft.

### Claim 3 (depends on 1)

The engine connection structure of claim 1,
wherein a housing separator is disposed between the mass or the connecting plate and a motor,
wherein a hub surrounding the rotor shaft is disposed at a center of the housing separator, and
wherein an oil seal to provide watertightness is disposed between an outer surface of the rotor shaft and an inner surface of the hub.