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Assembly device of pin roller force-transmitting type eccentric crankshaft

An assembly device and eccentric technology, applied in the field of assembly tooling, can solve the problems of reducing assembly efficiency and assembly quality, difficulty in ensuring assembly accuracy, time-consuming and laborious, etc., to improve assembly efficiency and assembly quality stability, facilitate operation, and reduce assembly deviation Effect

Pending Publication Date: 2020-04-03
NINGBO STF HYDRAULIC TRANSMISSIONS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such an operation method requires two alignments, which is time-consuming and labor-intensive, and the assembly accuracy is difficult to guarantee, which reduces the assembly efficiency and assembly quality, and also requires a higher technical level of the operator

Method used

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  • Assembly device of pin roller force-transmitting type eccentric crankshaft
  • Assembly device of pin roller force-transmitting type eccentric crankshaft
  • Assembly device of pin roller force-transmitting type eccentric crankshaft

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] As shown in the figure, an assembly device for a roller force transmission type eccentric crankshaft includes a convex base 1, the base 1 includes a base part 2 and a raised part 3 integrally formed above the base part 2, the raised part The outer wall of the part 3 includes a first positioning surface 4 for positioning the inner peripheral wall of the shaft sleeve 10, the upper surface of the base part 2 includes a second positioning surface 5 for positioning the bottom surface of the shaft sleeve, and the raised portion The upper end of 3 is coaxially provided with a concave counterbore 6, and an eccentric through hole 7 is provided eccentrically in the counterbore 6, that is, the central axis of the eccentric through hole 7 is non-coaxially arranged with the central axis of the counterbore 6, and the eccentric through hole 7 Up and down through the raised part 3 and the base part 2, the keyway end 12 of the eccentric crankshaft 11 is inserted into the eccentric throug...

Embodiment 2

[0020] This embodiment proposes an assembly device for a roller force transmission type eccentric crankshaft, which improves the structure of the first positioning surface 4 on the basis of the first embodiment. In this embodiment, the first positioning surface 4 is set as an inclined surface with the upper end inclined inward at a certain angle, and the angle range of the inclination angle α is 3° to 5°. The preferred inclination angle is set to 5°, which acts as a guide, making it easier for the bushing to be inserted and centered.

Embodiment 3

[0022] This embodiment proposes an assembly device for a roller force transmission type eccentric crankshaft, which further defines the structures of the counterbore 6 and the eccentric through hole 7 on the basis of the first embodiment. In this embodiment, the upper ends of the side walls of the counterbore 6 and the eccentric through hole 7 are both provided with arc-shaped chamfers. This acts as a guide, making it easier to place the eccentric crankshaft in the assembly unit and to facilitate alignment.

[0023] In this embodiment, the depth range of the inward concave of the counterbore 6 is 2.5-3.5 mm.

[0024] In this embodiment, there is a gap of 1-2 mm between the counterbore 6 and the eccentric cylinder 13 .

[0025] The working principle of the assembling device of a roller force transmission type eccentric crankshaft of the present invention is as follows: during operation, only the bushing needs to be placed on the base, and then the keyway end of the eccentric c...

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PUM

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Abstract

The invention discloses an assembly device of a pin roller force-transmitting type eccentric crankshaft. The assembly device is characterized in that the assembly device comprises a convex-shaped base, the base comprises a basic part and a convex part which is arranged on the upper part of the basic part in an integrally formed mode, the outer side wall of the convex part comprises a first positioning surface used for positioning the inner peripheral wall of a shaft sleeve, the upper surface of the basic part comprises a second positioning surface used for positioning the bottom surface of theshaft sleeve, a concave counter bore is coaxially formed in the upper end of the convex part, an eccentric through hole is formed in the counter bore in a penetrating mode, the end with a key grooveof the eccentric crankshaft is inserted into the eccentric through hole, an eccentric cylinder of the eccentric crankshaft is put into the counter bore, the bottom surface of the counter bore comprises a third positioning surface used of positioning the bottom surface of the eccentric cylinder, the side wall of the counter bore comprises a fourth positioning surface used for positioning the outerside wall of the eccentric cylinder, and the counter bore is in clearance fit with the eccentric cylinder. The assembly device has the advantages that centering can be quickly and automatically achieved, time and labor are saved, and the assembly efficiency and stability of assembly quality are improved.

Description

technical field [0001] The invention relates to the field of assembly tooling, in particular to an assembly device for a roller force transmission type eccentric crankshaft. Background technique [0002] The eccentric crankshaft is an important power transmission part in the engine. It bears the force transmitted by the connecting rod, converts it into torque and outputs it through the crankshaft and drives other accessories on the engine to work. At present, when the roller force transmission type eccentric crankshaft is assembled with the rollers, the eccentric crankshaft with one end of the keyway is first put into the bushing, so that the eccentric cylindrical surface of the eccentric crankshaft and the cylindrical surface of the bushing are kept as concentric as possible, and then the eccentric crankshaft is inserted into the gap. Install the four rollers. Due to the small operating space, it is necessary to use a tool to move the four rollers to the four installation p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P21/00
CPCB23P21/00B23P2700/07
Inventor 师文广赵崇碧张科杨韬然
Owner NINGBO STF HYDRAULIC TRANSMISSIONS CO LTD