I have fetch product details using function in product view page like below.

Here Sm/Sawyer is my theme.

    $_config = $this->helper('Sm\Sawyer\Helper\Data');
    $productId = $this->getProduct()->getId();
    $name = $this->getProduct()->getName();
    $stock1 = $this->getProduct()->getQty();
    $price = $this->getProduct()->getPrice();